[GitHub] [airflow] ashb commented on a change in pull request #9333: Split-off vault hook from vault secret backend

[GitBox <gi...@apache.org>]

ashb commented on a change in pull request #9333:
URL: https://github.com/apache/airflow/pull/9333#discussion_r441415763



##########
File path: airflow/providers/hashicorp/secrets/vault.py
##########
@@ -50,42 +46,44 @@ class VaultBackend(BaseSecretsBackend, LoggingMixin):
     would be accessible if you provide ``{"connections_path": "connections"}`` and request
     conn_id ``smtp_default``.
 
-    :param connections_path: Specifies the path of the secret to read to get Connections.
-        (default: 'connections')
+    :param connections_path: Specifies the path of the secret to read to get Connections
+        (default: 'connections').
     :type connections_path: str
-    :param variables_path: Specifies the path of the secret to read to get Variables.
-        (default: 'variables')
+    :param variables_path: Specifies the path of the secret to read to get Variables
+        (default: 'variables').
     :type variables_path: str
     :param url: Base URL for the Vault instance being addressed.
     :type url: str
-    :param auth_type: Authentication Type for Vault (one of 'token', 'ldap', 'userpass', 'approle',
-        'github', 'gcp', 'kubernetes'). Default is ``token``.
+    :param auth_type: Authentication Type for Vault. Default is ``token``. Available values are in
+        :py:const:`airflow.providers.hashicorp.hooks.vault.VALID_AUTH_TYPES`.
     :type auth_type: str
-    :param mount_point: The "path" the secret engine was mounted on. (Default: ``secret``)
+    :param mount_point: The "path" the secret engine was mounted on. Default is "secret". Note that
+         this mount_point is not used for authentication if authentication is done via a
+         different engine.
     :type mount_point: str
+    :param kv_engine_version: Select the version of the engine to run (``1`` or ``2``, default: ``2``).
+    :type kv_engine_version: int
     :param token: Authentication token to include in requests sent to Vault.
         (for ``token`` and ``github`` auth_type)
     :type token: str
-    :param kv_engine_version: Select the version of the engine to run (``1`` or ``2``, default: ``2``)
-    :type kv_engine_version: int
-    :param username: Username for Authentication (for ``ldap`` and ``userpass`` auth_type)
+    :param username: Username for Authentication (for ``ldap`` and ``userpass`` auth_type).
     :type username: str
-    :param password: Password for Authentication (for ``ldap`` and ``userpass`` auth_type)
+    :param password: Password for Authentication (for ``ldap`` and ``userpass`` auth_type).
     :type password: str
-    :param role_id: Role ID for Authentication (for ``approle`` auth_type)
+    :param secret_id: Secret ID for Authentication (for ``approle`` auth_type).
+    :type secret_id: str
+    :param role_id: Role ID for Authentication (for ``approle`` auth_type).
     :type role_id: str
-    :param kubernetes_role: Role for Authentication (for ``kubernetes`` auth_type)
+    :param kubernetes_role: Role for Authentication (for ``kubernetes`` auth_type).
     :type kubernetes_role: str
-    :param kubernetes_jwt_path: Path for kubernetes jwt token (for ``kubernetes`` auth_type, deafult:
-        ``/var/run/secrets/kubernetes.io/serviceaccount/token``)
+    :param kubernetes_jwt_path: Path for kubernetes jwt token (for ``kubernetes`` auth_type, default:
+        ``/var/run/secrets/kubernetes.io/serviceaccount/token``).
     :type kubernetes_jwt_path: str
-    :param secret_id: Secret ID for Authentication (for ``approle`` auth_type)
-    :type secret_id: str
-    :param gcp_key_path: Path to GCP Credential JSON file (for ``gcp`` auth_type)
+    :param gcp_key_path: Path to GCP Credential JSON file (for ``gcp`` auth_type).
     :type gcp_key_path: str
-    :param gcp_scopes: Comma-separated string containing GCP scopes (for ``gcp`` auth_type)
+    :param gcp_scopes: Comma-separated string containing GCP scopes (for ``gcp`` auth_type).
     :type gcp_scopes: str
-    """
+   """

Review comment:
       This looks like an errant delete happened?
   
   ```suggestion
       """
   ```

##########
File path: airflow/providers/hashicorp/secrets/vault.py
##########
@@ -50,42 +46,44 @@ class VaultBackend(BaseSecretsBackend, LoggingMixin):
     would be accessible if you provide ``{"connections_path": "connections"}`` and request
     conn_id ``smtp_default``.
 
-    :param connections_path: Specifies the path of the secret to read to get Connections.
-        (default: 'connections')
+    :param connections_path: Specifies the path of the secret to read to get Connections
+        (default: 'connections').
     :type connections_path: str
-    :param variables_path: Specifies the path of the secret to read to get Variables.
-        (default: 'variables')
+    :param variables_path: Specifies the path of the secret to read to get Variables
+        (default: 'variables').
     :type variables_path: str
     :param url: Base URL for the Vault instance being addressed.
     :type url: str
-    :param auth_type: Authentication Type for Vault (one of 'token', 'ldap', 'userpass', 'approle',
-        'github', 'gcp', 'kubernetes'). Default is ``token``.
+    :param auth_type: Authentication Type for Vault. Default is ``token``. Available values are in
+        :py:const:`airflow.providers.hashicorp.hooks.vault.VALID_AUTH_TYPES`.

Review comment:
       Do the possible values get shown in the rendered docs? If not can it please, otherwise we're needing users to source dive which isn't great.
   
   (Perhaps this means turning `VALID_AUTH_TYPES` in to `class AuthTypes(enum.enum)`? I'm not saying I need this to be an enum type, just I'd like the possible values in the rendered docs, and enum might be a way of achieving that.)

##########
File path: airflow/providers/hashicorp/hooks/vault.py
##########
@@ -0,0 +1,546 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+"""Hook for HashiCorp Vault"""
+from typing import List, Optional, Tuple
+
+import hvac
+from cached_property import cached_property
+from hvac.exceptions import InvalidPath, VaultError
+from requests import Response
+
+from airflow.hooks.base_hook import BaseHook
+from airflow.utils.log.logging_mixin import LoggingMixin
+
+DEFAULT_KUBERNETES_JWT_PATH = '/var/run/secrets/kubernetes.io/serviceaccount/token'
+DEFAULT_KV_ENGINE_VERSION = 2
+
+
+VALID_KV_VERSIONS: List[int] = [1, 2]
+VALID_AUTH_TYPES: List[str] = [
+    'approle',
+    'github',
+    'gcp',
+    'kubernetes',
+    'ldap',
+    'token',
+    'userpass'
+]
+
+
+class _VaultClient(LoggingMixin):  # pylint: disable=too-many-instance-attributes
+    """
+    Retrieves Authenticated client from Hashicorp Vault. This is purely internal class promoting
+    authentication code reuse between the Hook an Secret, it should not be used directly in
+    Airflow DAGs. Use VaultBackend for backend integration and Hook in case you want to communicate
+    with VaultHook using standard Airflow Connection definition.
+
+    :param url: Base URL for the Vault instance being addressed.
+    :type url: str
+    :param auth_type: Authentication Type for Vault. Default is ``token``. Available values are in
+        :py:const:`airflow.providers.hashicorp.hooks.vault.VALID_AUTH_TYPES`.
+    :type auth_type: str
+    :param mount_point: The "path" the secret engine was mounted on. Default is "secret". Note that
+         this mount_point is not used for authentication if authentication is done via a
+         different engine.
+    :type mount_point: str
+    :param kv_engine_version: Selects the version of the engine to run (``1`` or ``2``, default: ``2``).
+    :type kv_engine_version: int
+    :param token: Authentication token to include in requests sent to Vault
+        (for ``token`` and ``github`` auth_type).
+    :type token: str
+    :param username: Username for Authentication (for ``ldap`` and ``userpass`` auth_types).
+    :type username: str
+    :param password: Password for Authentication (for ``ldap`` and ``userpass`` auth_types).
+    :type password: str
+    :param secret_id: Secret ID for Authentication (for ``approle`` auth_type).
+    :type secret_id: str
+    :param role_id: Role ID for Authentication (for ``approle`` auth_type).
+    :type role_id: str
+    :param kubernetes_role: Role for Authentication (for ``kubernetes`` auth_type).
+    :type kubernetes_role: str
+    :param kubernetes_jwt_path: Path for kubernetes jwt token (for ``kubernetes`` auth_type, default:
+        ``/var/run/secrets/kubernetes.io/serviceaccount/token``).
+    :type kubernetes_jwt_path: str
+    :param gcp_key_path: Path to GCP Credential JSON file (for ``gcp`` auth_type).
+    :type gcp_key_path: str
+    :param gcp_scopes: Comma-separated string containing GCP scopes (for ``gcp`` auth_type).
+    :type gcp_scopes: str
+    """
+    def __init__(  # pylint: disable=too-many-arguments
+        self,
+        url: Optional[str] = None,
+        auth_type: str = 'token',
+        mount_point: str = "secret",
+        kv_engine_version: Optional[int] = None,
+        token: Optional[str] = None,
+        username: Optional[str] = None,
+        password: Optional[str] = None,
+        secret_id: Optional[str] = None,
+        role_id: Optional[str] = None,
+        kubernetes_role: Optional[str] = None,
+        kubernetes_jwt_path: Optional[str] = '/var/run/secrets/kubernetes.io/serviceaccount/token',
+        gcp_key_path: Optional[str] = None,
+        gcp_scopes: Optional[str] = None,
+        **kwargs
+    ):
+        super().__init__(**kwargs)
+        if kv_engine_version and kv_engine_version not in VALID_KV_VERSIONS:
+            raise VaultError(f"The version is not supported: {kv_engine_version}. "
+                             f"It should be one of {VALID_KV_VERSIONS}")
+        if auth_type not in VALID_AUTH_TYPES:
+            raise VaultError(f"The auth_type is not supported: {auth_type}. "
+                             f"It should be one of {VALID_AUTH_TYPES}")
+        if auth_type == "token" and not token:
+            raise VaultError("The 'token' authentication type requires 'token'")
+        if auth_type == "github" and not token:
+            raise VaultError("The 'github' authentication type requires 'token'")
+        if auth_type == "approle" and not role_id:
+            raise VaultError("The 'approle' authentication type requires 'role_id'")
+        if auth_type == "kubernetes":
+            if not kubernetes_role:
+                raise VaultError("The 'kubernetes' authentication type requires 'kubernetes_role'")
+            if not kubernetes_jwt_path:
+                raise VaultError("The 'kubernetes' authentication type requires 'kubernetes_jwt_path'")
+
+        self.kv_engine_version = kv_engine_version if kv_engine_version else 2
+        self.url = url
+        self.auth_type = auth_type
+        self.kwargs = kwargs
+        self.token = token
+        self.mount_point = mount_point
+        self.username = username
+        self.password = password
+        self.secret_id = secret_id
+        self.role_id = role_id
+        self.kubernetes_role = kubernetes_role
+        self.kubernetes_jwt_path = kubernetes_jwt_path
+        self.gcp_key_path = gcp_key_path
+        self.gcp_scopes = gcp_scopes
+
+    @cached_property
+    def client(self) -> hvac.Client:
+        """
+        Return an authenticated Hashicorp Vault client.
+
+        :rtype: hvac.Client
+        :return: Vault Client
+
+        """
+        _client = hvac.Client(url=self.url, **self.kwargs)
+        if self.auth_type == "approle":
+            self._auth_approle(_client)
+        elif self.auth_type == "gcp":
+            self._auth_gcp(_client)
+        elif self.auth_type == "github":
+            self._auth_github(_client)
+        elif self.auth_type == "kubernetes":
+            self._auth_kubernetes(_client)
+        elif self.auth_type == "ldap":
+            self._auth_ldap(_client)
+        elif self.auth_type == "token":
+            _client.token = self.token
+        elif self.auth_type == "userpass":
+            self._auth_userpass(_client)
+        else:
+            raise VaultError(f"Authentication type '{self.auth_type}' not supported")
+
+        if _client.is_authenticated():
+            return _client
+        else:
+            raise VaultError("Vault Authentication Error!")
+
+    def _auth_userpass(self, _client: hvac.Client) -> None:
+        _client.auth_userpass(username=self.username, password=self.password)
+
+    def _auth_ldap(self, _client: hvac.Client) -> None:
+        _client.auth.ldap.login(
+            username=self.username, password=self.password)
+
+    def _auth_kubernetes(self, _client: hvac.Client) -> None:
+        if not self.kubernetes_jwt_path:
+            raise VaultError("The kubernetes_jwt_path should be set here. This should not happen.")
+        with open(self.kubernetes_jwt_path) as f:
+            jwt = f.read()
+            _client.auth_kubernetes(role=self.kubernetes_role, jwt=jwt)
+
+    def _auth_github(self, _client: hvac.Client) -> None:
+        _client.auth.github.login(token=self.token)
+
+    def _auth_gcp(self, _client: hvac.Client) -> None:
+        # noinspection PyProtectedMember
+        from airflow.providers.google.cloud.utils.credentials_provider import (
+            get_credentials_and_project_id,
+            _get_scopes
+        )
+        scopes = _get_scopes(self.gcp_scopes)
+        credentials, _ = get_credentials_and_project_id(key_path=self.gcp_key_path,
+                                                        scopes=scopes)
+        _client.auth.gcp.configure(credentials=credentials)
+
+    def _auth_approle(self, _client: hvac.Client) -> None:
+        _client.auth_approle(role_id=self.role_id, secret_id=self.secret_id)
+
+    def get_secret(self, secret_path: str, secret_version: Optional[int] = None) -> Optional[dict]:
+        """
+        Get secret value from the engine.
+
+        :param secret_path: The path of the secret.
+        :type secret_path: str
+        :param secret_version: Specifies the version of Secret to return. If not set, the latest
+            version is returned. (Can only be used in case of version 2 of KV).
+        :type secret_version: int
+
+        See https://hvac.readthedocs.io/en/stable/usage/secrets_engines/kv_v1.html
+        and https://hvac.readthedocs.io/en/stable/usage/secrets_engines/kv_v2.html for details.
+
+        :return: secret stored in the vault as a dictionary
+        """
+        try:
+            if self.kv_engine_version == 1:
+                if secret_version:
+                    raise VaultError("Secret version can only be used with version 2 of the KV engine")
+                response = self.client.secrets.kv.v1.read_secret(
+                    path=secret_path, mount_point=self.mount_point)
+            else:
+                response = self.client.secrets.kv.v2.read_secret_version(
+                    path=secret_path, mount_point=self.mount_point, version=secret_version)
+        except InvalidPath:
+            self.log.debug("Secret not found %s with mount point %s", secret_path, self.mount_point)
+            return None
+
+        return_data = response["data"] if self.kv_engine_version == 1 else response["data"]["data"]
+        return return_data
+
+    def get_secret_metadata(self, secret_path: str) -> Optional[dict]:
+        """
+        Reads secret metadata (including versions) from the engine. It is only valid for KV version 2.
+
+        :param secret_path: The path of the secret.
+        :type secret_path: str
+        :rtype: dict
+        :return: secret metadata. This is a Dict containing metadata for the secret.
+
+                 See https://hvac.readthedocs.io/en/stable/usage/secrets_engines/kv_v2.html for details.
+
+        """
+        if self.kv_engine_version == 1:
+            raise VaultError("Metadata might only be used with version 2 of the KV engine.")
+        try:
+            return self.client.secrets.kv.v2.read_secret_metadata(
+                path=secret_path,
+                mount_point=self.mount_point)
+        except InvalidPath:
+            self.log.debug("Secret not found %s with mount point %s", secret_path, self.mount_point)
+            return None
+
+    def get_secret_including_metadata(self,
+                                      secret_path: str,
+                                      secret_version: Optional[int] = None) -> Optional[dict]:
+        """
+        Reads secret including metadata. It is only valid for KV version 2.
+
+        See https://hvac.readthedocs.io/en/stable/usage/secrets_engines/kv_v2.html for details.
+
+        :param secret_path: The path of the secret.
+        :type secret_path: str
+        :param secret_version: Specifies the version of Secret to return. If not set, the latest
+            version is returned. (Can only be used in case of version 2 of KV).
+        :type secret_version: int
+        :rtype: dict
+        :return: The key info. This is a Dict with "data" mapping keeping secret
+                 and "metadata" mapping keeping metadata of the secret.
+        """
+        if self.kv_engine_version == 1:
+            raise VaultError("Metadata might only be used with version 2 of the KV engine.")
+        try:
+            return self.client.secrets.kv.v2.read_secret_version(
+                path=secret_path, mount_point=self.mount_point,
+                version=secret_version)
+        except InvalidPath:
+            self.log.debug("Secret not found %s with mount point %s and version %s",
+                           secret_path, self.mount_point, secret_version)
+            return None
+
+    def create_or_update_secret(self,
+                                secret_path: str,
+                                secret: dict,
+                                method: Optional[str] = None,
+                                cas: Optional[int] = None) -> Response:
+        """
+        Creates or updates secret.
+
+        :param secret_path: The path of the secret.
+        :type secret_path: str
+        :param secret: Secret to create or update for the path specified
+        :type secret: dict
+        :param method: Optional parameter to explicitly request a POST (create) or PUT (update) request to
+            the selected kv secret engine. If no argument is provided for this parameter, hvac attempts to
+            intelligently determine which method is appropriate. Only valid for KV engine version 1
+        :type method: str
+        :param cas: Set the "cas" value to use a Check-And-Set operation. If not set the write will be
+            allowed. If set to 0 a write will only be allowed if the key doesn't exist.
+            If the index is non-zero the write will only be allowed if the key's current version
+            matches the version specified in the cas parameter. Only valid for KV engine version 2.
+        :type cas: int
+        :rtype: requests.Response
+        :return: The response of the create_or_update_secret request.
+
+                 See https://hvac.readthedocs.io/en/stable/usage/secrets_engines/kv_v1.html
+                 and https://hvac.readthedocs.io/en/stable/usage/secrets_engines/kv_v2.html for details.
+
+        """
+        if self.kv_engine_version == 2 and method:
+            raise VaultError("The method parameter is only valid for version 1")
+        if self.kv_engine_version == 1 and cas:
+            raise VaultError("The cas parameter is only valid for version 2")
+        if self.kv_engine_version == 1:
+            response = self.client.secrets.kv.v1.create_or_update_secret(
+                secret_path=secret_path, secret=secret, mount_point=self.mount_point, method=method)
+        else:
+            response = self.client.secrets.kv.v2.create_or_update_secret(
+                secret_path=secret_path, secret=secret, mount_point=self.mount_point, cas=cas)
+        return response
+
+
+class VaultHook(BaseHook):
+    """
+    HashiCorp Vault wrapper to Interact with HashiCorp Vault KeyValue Secret engine.
+
+    HashiCorp HVac documentation:
+       * https://hvac.readthedocs.io/en/stable/
+
+    You connect to the host specified as host in the connection. The login/password from the connection
+    are used as credentials usually and you can specify different authentication parameters
+    via init params or via corresponding extras in the connection.
+
+    The extras in the connection are named the same as the parameters (`mount_point`,'kv_engine_version' ...).
+
+    Login/Password are used as credentials:
+
+        * approle: password -> secret_id
+        * ldap: login -> username,   password -> password
+        * userpass: login -> username, password -> password
+
+    :param vault_conn_id: The id of the connection to use
+    :type vault_conn_id: str
+    :param auth_type: Authentication Type for Vault. Default is ``token``. Available values are in
+        :py:const:`airflow.providers.hashicorp.hooks.vault.VALID_AUTH_TYPES`.
+    :type auth_type: str
+    :param mount_point: The "path" the secret engine was mounted on. Default is "secret". Note that
+         this mount_point is not used for authentication if authentication is done via a
+         different engine.
+    :type mount_point: str
+    :param kv_engine_version: Select the version of the engine to run (``1`` or ``2``). Defaults to
+          version defined in connection or ``2`` if not defined in connection.
+    :type kv_engine_version: int
+    :param token: Authentication token to include in requests sent to Vault.
+        (for ``token`` and ``github`` auth_type)
+    :type token: str
+    :param role_id: Role ID for Authentication (for ``approle`` auth_type)
+    :type role_id: str
+    :param kubernetes_role: Role for Authentication (for ``kubernetes`` auth_type)
+    :type kubernetes_role: str
+    :param kubernetes_jwt_path: Path for kubernetes jwt token (for ``kubernetes`` auth_type, default:
+        ``/var/run/secrets/kubernetes.io/serviceaccount/token``)
+    :type kubernetes_jwt_path: str
+    :param gcp_key_path: Path to GCP Credential JSON file (for ``gcp`` auth_type)
+    :type gcp_key_path: str
+    :param gcp_scopes: Comma-separated string containing GCP scopes (for ``gcp`` auth_type)
+    :type gcp_scopes: str
+
+    """
+    def __init__(  # pylint: disable=too-many-arguments
+        self,
+        vault_conn_id: str,
+        auth_type: Optional[str] = None,
+        mount_point: Optional[str] = None,
+        kv_engine_version: Optional[int] = None,
+        token: Optional[str] = None,
+        role_id: Optional[str] = None,
+        kubernetes_role: Optional[str] = None,
+        kubernetes_jwt_path: Optional[str] = None,
+        gcp_key_path: Optional[str] = None,
+        gcp_scopes: Optional[str] = None,
+    ):
+        super().__init__()
+        self.connection = self.get_connection(vault_conn_id)
+
+        if not auth_type:
+            auth_type = self.connection.extra_dejson.get('auth_type') or "token"
+
+        if not mount_point:
+            mount_point = self.connection.extra_dejson.get('mount_point')
+        if not mount_point:
+            mount_point = 'secret'
+
+        if not kv_engine_version:
+            conn_version = self.connection.extra_dejson.get("kv_engine_version")
+            try:
+                kv_engine_version = int(conn_version) if conn_version else DEFAULT_KV_ENGINE_VERSION
+            except ValueError:
+                raise VaultError(f"The version is not an int: {conn_version}. ")
+
+        if auth_type in ["approle"]:
+            if not role_id:
+                role_id = self.connection.extra_dejson.get('role_id')
+
+        if auth_type in ['github', "token"]:
+            if not token:
+                token = self.connection.extra_dejson.get('token')
+        gcp_key_path, gcp_scopes = \
+            self._get_gcp_parameters_from_connection(gcp_key_path, gcp_scopes) \
+            if auth_type == 'gcp' else (None, None)
+        kubernetes_jwt_path, kubernetes_role = \
+            self._get_kubernetes_parameters_from_connection(kubernetes_jwt_path, kubernetes_role) \
+            if auth_type == 'kubernetes' else (None, None)
+
+        url = f"{self.connection.schema}://{self.connection.host}"
+        if self.connection.port:
+            url += f":{self.connection.port}"
+
+        self.vault_client = _VaultClient(
+            url=url,
+            auth_type=auth_type,
+            mount_point=mount_point,
+            kv_engine_version=kv_engine_version,
+            token=token,
+            username=self.connection.login,
+            password=self.connection.password,
+            secret_id=self.connection.password,

Review comment:
       ```suggestion
               secret_id=self.secret_id,
   ```
   
   I think?

##########
File path: airflow/providers/hashicorp/hooks/vault.py
##########
@@ -0,0 +1,546 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+"""Hook for HashiCorp Vault"""
+from typing import List, Optional, Tuple
+
+import hvac
+from cached_property import cached_property
+from hvac.exceptions import InvalidPath, VaultError
+from requests import Response
+
+from airflow.hooks.base_hook import BaseHook
+from airflow.utils.log.logging_mixin import LoggingMixin
+
+DEFAULT_KUBERNETES_JWT_PATH = '/var/run/secrets/kubernetes.io/serviceaccount/token'
+DEFAULT_KV_ENGINE_VERSION = 2
+
+
+VALID_KV_VERSIONS: List[int] = [1, 2]
+VALID_AUTH_TYPES: List[str] = [
+    'approle',
+    'github',
+    'gcp',
+    'kubernetes',
+    'ldap',
+    'token',
+    'userpass'
+]
+
+
+class _VaultClient(LoggingMixin):  # pylint: disable=too-many-instance-attributes
+    """
+    Retrieves Authenticated client from Hashicorp Vault. This is purely internal class promoting
+    authentication code reuse between the Hook an Secret, it should not be used directly in
+    Airflow DAGs. Use VaultBackend for backend integration and Hook in case you want to communicate
+    with VaultHook using standard Airflow Connection definition.
+
+    :param url: Base URL for the Vault instance being addressed.
+    :type url: str
+    :param auth_type: Authentication Type for Vault. Default is ``token``. Available values are in
+        :py:const:`airflow.providers.hashicorp.hooks.vault.VALID_AUTH_TYPES`.
+    :type auth_type: str
+    :param mount_point: The "path" the secret engine was mounted on. Default is "secret". Note that
+         this mount_point is not used for authentication if authentication is done via a
+         different engine.
+    :type mount_point: str
+    :param kv_engine_version: Selects the version of the engine to run (``1`` or ``2``, default: ``2``).
+    :type kv_engine_version: int
+    :param token: Authentication token to include in requests sent to Vault
+        (for ``token`` and ``github`` auth_type).
+    :type token: str
+    :param username: Username for Authentication (for ``ldap`` and ``userpass`` auth_types).
+    :type username: str
+    :param password: Password for Authentication (for ``ldap`` and ``userpass`` auth_types).
+    :type password: str
+    :param secret_id: Secret ID for Authentication (for ``approle`` auth_type).
+    :type secret_id: str
+    :param role_id: Role ID for Authentication (for ``approle`` auth_type).
+    :type role_id: str
+    :param kubernetes_role: Role for Authentication (for ``kubernetes`` auth_type).
+    :type kubernetes_role: str
+    :param kubernetes_jwt_path: Path for kubernetes jwt token (for ``kubernetes`` auth_type, default:
+        ``/var/run/secrets/kubernetes.io/serviceaccount/token``).
+    :type kubernetes_jwt_path: str
+    :param gcp_key_path: Path to GCP Credential JSON file (for ``gcp`` auth_type).
+    :type gcp_key_path: str
+    :param gcp_scopes: Comma-separated string containing GCP scopes (for ``gcp`` auth_type).
+    :type gcp_scopes: str
+    """
+    def __init__(  # pylint: disable=too-many-arguments
+        self,
+        url: Optional[str] = None,
+        auth_type: str = 'token',
+        mount_point: str = "secret",
+        kv_engine_version: Optional[int] = None,
+        token: Optional[str] = None,
+        username: Optional[str] = None,
+        password: Optional[str] = None,
+        secret_id: Optional[str] = None,
+        role_id: Optional[str] = None,
+        kubernetes_role: Optional[str] = None,
+        kubernetes_jwt_path: Optional[str] = '/var/run/secrets/kubernetes.io/serviceaccount/token',
+        gcp_key_path: Optional[str] = None,
+        gcp_scopes: Optional[str] = None,
+        **kwargs
+    ):
+        super().__init__(**kwargs)
+        if kv_engine_version and kv_engine_version not in VALID_KV_VERSIONS:
+            raise VaultError(f"The version is not supported: {kv_engine_version}. "
+                             f"It should be one of {VALID_KV_VERSIONS}")
+        if auth_type not in VALID_AUTH_TYPES:
+            raise VaultError(f"The auth_type is not supported: {auth_type}. "
+                             f"It should be one of {VALID_AUTH_TYPES}")
+        if auth_type == "token" and not token:
+            raise VaultError("The 'token' authentication type requires 'token'")
+        if auth_type == "github" and not token:
+            raise VaultError("The 'github' authentication type requires 'token'")
+        if auth_type == "approle" and not role_id:
+            raise VaultError("The 'approle' authentication type requires 'role_id'")
+        if auth_type == "kubernetes":
+            if not kubernetes_role:
+                raise VaultError("The 'kubernetes' authentication type requires 'kubernetes_role'")
+            if not kubernetes_jwt_path:
+                raise VaultError("The 'kubernetes' authentication type requires 'kubernetes_jwt_path'")
+
+        self.kv_engine_version = kv_engine_version if kv_engine_version else 2
+        self.url = url
+        self.auth_type = auth_type
+        self.kwargs = kwargs
+        self.token = token
+        self.mount_point = mount_point
+        self.username = username
+        self.password = password
+        self.secret_id = secret_id
+        self.role_id = role_id
+        self.kubernetes_role = kubernetes_role
+        self.kubernetes_jwt_path = kubernetes_jwt_path
+        self.gcp_key_path = gcp_key_path
+        self.gcp_scopes = gcp_scopes
+
+    @cached_property
+    def client(self) -> hvac.Client:
+        """
+        Return an authenticated Hashicorp Vault client.
+
+        :rtype: hvac.Client
+        :return: Vault Client
+
+        """
+        _client = hvac.Client(url=self.url, **self.kwargs)
+        if self.auth_type == "approle":
+            self._auth_approle(_client)
+        elif self.auth_type == "gcp":
+            self._auth_gcp(_client)
+        elif self.auth_type == "github":
+            self._auth_github(_client)
+        elif self.auth_type == "kubernetes":
+            self._auth_kubernetes(_client)
+        elif self.auth_type == "ldap":
+            self._auth_ldap(_client)
+        elif self.auth_type == "token":
+            _client.token = self.token
+        elif self.auth_type == "userpass":
+            self._auth_userpass(_client)
+        else:
+            raise VaultError(f"Authentication type '{self.auth_type}' not supported")
+
+        if _client.is_authenticated():
+            return _client
+        else:
+            raise VaultError("Vault Authentication Error!")
+
+    def _auth_userpass(self, _client: hvac.Client) -> None:
+        _client.auth_userpass(username=self.username, password=self.password)
+
+    def _auth_ldap(self, _client: hvac.Client) -> None:
+        _client.auth.ldap.login(
+            username=self.username, password=self.password)
+
+    def _auth_kubernetes(self, _client: hvac.Client) -> None:
+        if not self.kubernetes_jwt_path:
+            raise VaultError("The kubernetes_jwt_path should be set here. This should not happen.")
+        with open(self.kubernetes_jwt_path) as f:
+            jwt = f.read()
+            _client.auth_kubernetes(role=self.kubernetes_role, jwt=jwt)
+
+    def _auth_github(self, _client: hvac.Client) -> None:
+        _client.auth.github.login(token=self.token)
+
+    def _auth_gcp(self, _client: hvac.Client) -> None:
+        # noinspection PyProtectedMember
+        from airflow.providers.google.cloud.utils.credentials_provider import (
+            get_credentials_and_project_id,
+            _get_scopes
+        )
+        scopes = _get_scopes(self.gcp_scopes)
+        credentials, _ = get_credentials_and_project_id(key_path=self.gcp_key_path,
+                                                        scopes=scopes)
+        _client.auth.gcp.configure(credentials=credentials)
+
+    def _auth_approle(self, _client: hvac.Client) -> None:
+        _client.auth_approle(role_id=self.role_id, secret_id=self.secret_id)
+
+    def get_secret(self, secret_path: str, secret_version: Optional[int] = None) -> Optional[dict]:
+        """
+        Get secret value from the engine.
+
+        :param secret_path: The path of the secret.
+        :type secret_path: str
+        :param secret_version: Specifies the version of Secret to return. If not set, the latest
+            version is returned. (Can only be used in case of version 2 of KV).
+        :type secret_version: int
+
+        See https://hvac.readthedocs.io/en/stable/usage/secrets_engines/kv_v1.html
+        and https://hvac.readthedocs.io/en/stable/usage/secrets_engines/kv_v2.html for details.
+
+        :return: secret stored in the vault as a dictionary
+        """
+        try:
+            if self.kv_engine_version == 1:
+                if secret_version:
+                    raise VaultError("Secret version can only be used with version 2 of the KV engine")
+                response = self.client.secrets.kv.v1.read_secret(
+                    path=secret_path, mount_point=self.mount_point)
+            else:
+                response = self.client.secrets.kv.v2.read_secret_version(
+                    path=secret_path, mount_point=self.mount_point, version=secret_version)
+        except InvalidPath:
+            self.log.debug("Secret not found %s with mount point %s", secret_path, self.mount_point)
+            return None
+
+        return_data = response["data"] if self.kv_engine_version == 1 else response["data"]["data"]
+        return return_data
+
+    def get_secret_metadata(self, secret_path: str) -> Optional[dict]:
+        """
+        Reads secret metadata (including versions) from the engine. It is only valid for KV version 2.
+
+        :param secret_path: The path of the secret.
+        :type secret_path: str
+        :rtype: dict
+        :return: secret metadata. This is a Dict containing metadata for the secret.
+
+                 See https://hvac.readthedocs.io/en/stable/usage/secrets_engines/kv_v2.html for details.
+
+        """
+        if self.kv_engine_version == 1:
+            raise VaultError("Metadata might only be used with version 2 of the KV engine.")
+        try:
+            return self.client.secrets.kv.v2.read_secret_metadata(
+                path=secret_path,
+                mount_point=self.mount_point)
+        except InvalidPath:
+            self.log.debug("Secret not found %s with mount point %s", secret_path, self.mount_point)
+            return None
+
+    def get_secret_including_metadata(self,
+                                      secret_path: str,
+                                      secret_version: Optional[int] = None) -> Optional[dict]:
+        """
+        Reads secret including metadata. It is only valid for KV version 2.
+
+        See https://hvac.readthedocs.io/en/stable/usage/secrets_engines/kv_v2.html for details.
+
+        :param secret_path: The path of the secret.
+        :type secret_path: str
+        :param secret_version: Specifies the version of Secret to return. If not set, the latest
+            version is returned. (Can only be used in case of version 2 of KV).
+        :type secret_version: int
+        :rtype: dict
+        :return: The key info. This is a Dict with "data" mapping keeping secret
+                 and "metadata" mapping keeping metadata of the secret.
+        """
+        if self.kv_engine_version == 1:
+            raise VaultError("Metadata might only be used with version 2 of the KV engine.")
+        try:
+            return self.client.secrets.kv.v2.read_secret_version(
+                path=secret_path, mount_point=self.mount_point,
+                version=secret_version)
+        except InvalidPath:
+            self.log.debug("Secret not found %s with mount point %s and version %s",
+                           secret_path, self.mount_point, secret_version)
+            return None
+
+    def create_or_update_secret(self,
+                                secret_path: str,
+                                secret: dict,
+                                method: Optional[str] = None,
+                                cas: Optional[int] = None) -> Response:
+        """
+        Creates or updates secret.
+
+        :param secret_path: The path of the secret.
+        :type secret_path: str
+        :param secret: Secret to create or update for the path specified
+        :type secret: dict
+        :param method: Optional parameter to explicitly request a POST (create) or PUT (update) request to
+            the selected kv secret engine. If no argument is provided for this parameter, hvac attempts to
+            intelligently determine which method is appropriate. Only valid for KV engine version 1
+        :type method: str
+        :param cas: Set the "cas" value to use a Check-And-Set operation. If not set the write will be
+            allowed. If set to 0 a write will only be allowed if the key doesn't exist.
+            If the index is non-zero the write will only be allowed if the key's current version
+            matches the version specified in the cas parameter. Only valid for KV engine version 2.
+        :type cas: int
+        :rtype: requests.Response
+        :return: The response of the create_or_update_secret request.
+
+                 See https://hvac.readthedocs.io/en/stable/usage/secrets_engines/kv_v1.html
+                 and https://hvac.readthedocs.io/en/stable/usage/secrets_engines/kv_v2.html for details.
+
+        """
+        if self.kv_engine_version == 2 and method:
+            raise VaultError("The method parameter is only valid for version 1")
+        if self.kv_engine_version == 1 and cas:
+            raise VaultError("The cas parameter is only valid for version 2")
+        if self.kv_engine_version == 1:
+            response = self.client.secrets.kv.v1.create_or_update_secret(
+                secret_path=secret_path, secret=secret, mount_point=self.mount_point, method=method)
+        else:
+            response = self.client.secrets.kv.v2.create_or_update_secret(
+                secret_path=secret_path, secret=secret, mount_point=self.mount_point, cas=cas)
+        return response
+
+
+class VaultHook(BaseHook):
+    """
+    HashiCorp Vault wrapper to Interact with HashiCorp Vault KeyValue Secret engine.

Review comment:
       ```suggestion
       Hook to Interact with HashiCorp Vault KeyValue Secret engine.
   ```

##########
File path: airflow/providers/hashicorp/hooks/vault.py
##########
@@ -0,0 +1,546 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+"""Hook for HashiCorp Vault"""
+from typing import List, Optional, Tuple
+
+import hvac
+from cached_property import cached_property
+from hvac.exceptions import InvalidPath, VaultError
+from requests import Response
+
+from airflow.hooks.base_hook import BaseHook
+from airflow.utils.log.logging_mixin import LoggingMixin
+
+DEFAULT_KUBERNETES_JWT_PATH = '/var/run/secrets/kubernetes.io/serviceaccount/token'
+DEFAULT_KV_ENGINE_VERSION = 2
+
+
+VALID_KV_VERSIONS: List[int] = [1, 2]
+VALID_AUTH_TYPES: List[str] = [
+    'approle',
+    'github',
+    'gcp',
+    'kubernetes',
+    'ldap',
+    'token',
+    'userpass'
+]
+
+
+class _VaultClient(LoggingMixin):  # pylint: disable=too-many-instance-attributes
+    """
+    Retrieves Authenticated client from Hashicorp Vault. This is purely internal class promoting
+    authentication code reuse between the Hook an Secret, it should not be used directly in
+    Airflow DAGs. Use VaultBackend for backend integration and Hook in case you want to communicate
+    with VaultHook using standard Airflow Connection definition.
+
+    :param url: Base URL for the Vault instance being addressed.
+    :type url: str
+    :param auth_type: Authentication Type for Vault. Default is ``token``. Available values are in
+        :py:const:`airflow.providers.hashicorp.hooks.vault.VALID_AUTH_TYPES`.
+    :type auth_type: str
+    :param mount_point: The "path" the secret engine was mounted on. Default is "secret". Note that
+         this mount_point is not used for authentication if authentication is done via a
+         different engine.
+    :type mount_point: str
+    :param kv_engine_version: Selects the version of the engine to run (``1`` or ``2``, default: ``2``).
+    :type kv_engine_version: int
+    :param token: Authentication token to include in requests sent to Vault
+        (for ``token`` and ``github`` auth_type).
+    :type token: str
+    :param username: Username for Authentication (for ``ldap`` and ``userpass`` auth_types).
+    :type username: str
+    :param password: Password for Authentication (for ``ldap`` and ``userpass`` auth_types).
+    :type password: str
+    :param secret_id: Secret ID for Authentication (for ``approle`` auth_type).
+    :type secret_id: str
+    :param role_id: Role ID for Authentication (for ``approle`` auth_type).
+    :type role_id: str
+    :param kubernetes_role: Role for Authentication (for ``kubernetes`` auth_type).
+    :type kubernetes_role: str
+    :param kubernetes_jwt_path: Path for kubernetes jwt token (for ``kubernetes`` auth_type, default:
+        ``/var/run/secrets/kubernetes.io/serviceaccount/token``).
+    :type kubernetes_jwt_path: str
+    :param gcp_key_path: Path to GCP Credential JSON file (for ``gcp`` auth_type).
+    :type gcp_key_path: str
+    :param gcp_scopes: Comma-separated string containing GCP scopes (for ``gcp`` auth_type).
+    :type gcp_scopes: str
+    """
+    def __init__(  # pylint: disable=too-many-arguments
+        self,
+        url: Optional[str] = None,
+        auth_type: str = 'token',
+        mount_point: str = "secret",
+        kv_engine_version: Optional[int] = None,
+        token: Optional[str] = None,
+        username: Optional[str] = None,
+        password: Optional[str] = None,
+        secret_id: Optional[str] = None,
+        role_id: Optional[str] = None,
+        kubernetes_role: Optional[str] = None,
+        kubernetes_jwt_path: Optional[str] = '/var/run/secrets/kubernetes.io/serviceaccount/token',
+        gcp_key_path: Optional[str] = None,
+        gcp_scopes: Optional[str] = None,
+        **kwargs
+    ):
+        super().__init__(**kwargs)
+        if kv_engine_version and kv_engine_version not in VALID_KV_VERSIONS:
+            raise VaultError(f"The version is not supported: {kv_engine_version}. "
+                             f"It should be one of {VALID_KV_VERSIONS}")
+        if auth_type not in VALID_AUTH_TYPES:
+            raise VaultError(f"The auth_type is not supported: {auth_type}. "
+                             f"It should be one of {VALID_AUTH_TYPES}")
+        if auth_type == "token" and not token:
+            raise VaultError("The 'token' authentication type requires 'token'")
+        if auth_type == "github" and not token:
+            raise VaultError("The 'github' authentication type requires 'token'")
+        if auth_type == "approle" and not role_id:
+            raise VaultError("The 'approle' authentication type requires 'role_id'")
+        if auth_type == "kubernetes":
+            if not kubernetes_role:
+                raise VaultError("The 'kubernetes' authentication type requires 'kubernetes_role'")
+            if not kubernetes_jwt_path:
+                raise VaultError("The 'kubernetes' authentication type requires 'kubernetes_jwt_path'")
+
+        self.kv_engine_version = kv_engine_version if kv_engine_version else 2
+        self.url = url
+        self.auth_type = auth_type
+        self.kwargs = kwargs
+        self.token = token
+        self.mount_point = mount_point
+        self.username = username
+        self.password = password
+        self.secret_id = secret_id
+        self.role_id = role_id
+        self.kubernetes_role = kubernetes_role
+        self.kubernetes_jwt_path = kubernetes_jwt_path
+        self.gcp_key_path = gcp_key_path
+        self.gcp_scopes = gcp_scopes
+
+    @cached_property
+    def client(self) -> hvac.Client:
+        """
+        Return an authenticated Hashicorp Vault client.
+
+        :rtype: hvac.Client
+        :return: Vault Client
+
+        """
+        _client = hvac.Client(url=self.url, **self.kwargs)
+        if self.auth_type == "approle":
+            self._auth_approle(_client)
+        elif self.auth_type == "gcp":
+            self._auth_gcp(_client)
+        elif self.auth_type == "github":
+            self._auth_github(_client)
+        elif self.auth_type == "kubernetes":
+            self._auth_kubernetes(_client)
+        elif self.auth_type == "ldap":
+            self._auth_ldap(_client)
+        elif self.auth_type == "token":
+            _client.token = self.token
+        elif self.auth_type == "userpass":
+            self._auth_userpass(_client)
+        else:
+            raise VaultError(f"Authentication type '{self.auth_type}' not supported")
+
+        if _client.is_authenticated():
+            return _client
+        else:
+            raise VaultError("Vault Authentication Error!")
+
+    def _auth_userpass(self, _client: hvac.Client) -> None:
+        _client.auth_userpass(username=self.username, password=self.password)
+
+    def _auth_ldap(self, _client: hvac.Client) -> None:
+        _client.auth.ldap.login(
+            username=self.username, password=self.password)
+
+    def _auth_kubernetes(self, _client: hvac.Client) -> None:
+        if not self.kubernetes_jwt_path:
+            raise VaultError("The kubernetes_jwt_path should be set here. This should not happen.")
+        with open(self.kubernetes_jwt_path) as f:
+            jwt = f.read()
+            _client.auth_kubernetes(role=self.kubernetes_role, jwt=jwt)
+
+    def _auth_github(self, _client: hvac.Client) -> None:
+        _client.auth.github.login(token=self.token)
+
+    def _auth_gcp(self, _client: hvac.Client) -> None:
+        # noinspection PyProtectedMember
+        from airflow.providers.google.cloud.utils.credentials_provider import (
+            get_credentials_and_project_id,
+            _get_scopes
+        )
+        scopes = _get_scopes(self.gcp_scopes)
+        credentials, _ = get_credentials_and_project_id(key_path=self.gcp_key_path,
+                                                        scopes=scopes)
+        _client.auth.gcp.configure(credentials=credentials)
+
+    def _auth_approle(self, _client: hvac.Client) -> None:
+        _client.auth_approle(role_id=self.role_id, secret_id=self.secret_id)
+
+    def get_secret(self, secret_path: str, secret_version: Optional[int] = None) -> Optional[dict]:
+        """
+        Get secret value from the engine.
+
+        :param secret_path: The path of the secret.
+        :type secret_path: str
+        :param secret_version: Specifies the version of Secret to return. If not set, the latest
+            version is returned. (Can only be used in case of version 2 of KV).
+        :type secret_version: int
+
+        See https://hvac.readthedocs.io/en/stable/usage/secrets_engines/kv_v1.html
+        and https://hvac.readthedocs.io/en/stable/usage/secrets_engines/kv_v2.html for details.
+
+        :return: secret stored in the vault as a dictionary
+        """
+        try:
+            if self.kv_engine_version == 1:
+                if secret_version:
+                    raise VaultError("Secret version can only be used with version 2 of the KV engine")
+                response = self.client.secrets.kv.v1.read_secret(
+                    path=secret_path, mount_point=self.mount_point)
+            else:
+                response = self.client.secrets.kv.v2.read_secret_version(
+                    path=secret_path, mount_point=self.mount_point, version=secret_version)
+        except InvalidPath:
+            self.log.debug("Secret not found %s with mount point %s", secret_path, self.mount_point)
+            return None
+
+        return_data = response["data"] if self.kv_engine_version == 1 else response["data"]["data"]
+        return return_data
+
+    def get_secret_metadata(self, secret_path: str) -> Optional[dict]:
+        """
+        Reads secret metadata (including versions) from the engine. It is only valid for KV version 2.
+
+        :param secret_path: The path of the secret.
+        :type secret_path: str
+        :rtype: dict
+        :return: secret metadata. This is a Dict containing metadata for the secret.
+
+                 See https://hvac.readthedocs.io/en/stable/usage/secrets_engines/kv_v2.html for details.
+
+        """
+        if self.kv_engine_version == 1:
+            raise VaultError("Metadata might only be used with version 2 of the KV engine.")
+        try:
+            return self.client.secrets.kv.v2.read_secret_metadata(
+                path=secret_path,
+                mount_point=self.mount_point)
+        except InvalidPath:
+            self.log.debug("Secret not found %s with mount point %s", secret_path, self.mount_point)
+            return None
+
+    def get_secret_including_metadata(self,
+                                      secret_path: str,
+                                      secret_version: Optional[int] = None) -> Optional[dict]:
+        """
+        Reads secret including metadata. It is only valid for KV version 2.
+
+        See https://hvac.readthedocs.io/en/stable/usage/secrets_engines/kv_v2.html for details.
+
+        :param secret_path: The path of the secret.
+        :type secret_path: str
+        :param secret_version: Specifies the version of Secret to return. If not set, the latest
+            version is returned. (Can only be used in case of version 2 of KV).
+        :type secret_version: int
+        :rtype: dict
+        :return: The key info. This is a Dict with "data" mapping keeping secret
+                 and "metadata" mapping keeping metadata of the secret.
+        """
+        if self.kv_engine_version == 1:
+            raise VaultError("Metadata might only be used with version 2 of the KV engine.")
+        try:
+            return self.client.secrets.kv.v2.read_secret_version(
+                path=secret_path, mount_point=self.mount_point,
+                version=secret_version)
+        except InvalidPath:
+            self.log.debug("Secret not found %s with mount point %s and version %s",
+                           secret_path, self.mount_point, secret_version)
+            return None
+
+    def create_or_update_secret(self,
+                                secret_path: str,
+                                secret: dict,
+                                method: Optional[str] = None,
+                                cas: Optional[int] = None) -> Response:
+        """
+        Creates or updates secret.
+
+        :param secret_path: The path of the secret.
+        :type secret_path: str
+        :param secret: Secret to create or update for the path specified
+        :type secret: dict
+        :param method: Optional parameter to explicitly request a POST (create) or PUT (update) request to
+            the selected kv secret engine. If no argument is provided for this parameter, hvac attempts to
+            intelligently determine which method is appropriate. Only valid for KV engine version 1
+        :type method: str
+        :param cas: Set the "cas" value to use a Check-And-Set operation. If not set the write will be
+            allowed. If set to 0 a write will only be allowed if the key doesn't exist.
+            If the index is non-zero the write will only be allowed if the key's current version
+            matches the version specified in the cas parameter. Only valid for KV engine version 2.
+        :type cas: int
+        :rtype: requests.Response
+        :return: The response of the create_or_update_secret request.
+
+                 See https://hvac.readthedocs.io/en/stable/usage/secrets_engines/kv_v1.html
+                 and https://hvac.readthedocs.io/en/stable/usage/secrets_engines/kv_v2.html for details.
+
+        """
+        if self.kv_engine_version == 2 and method:
+            raise VaultError("The method parameter is only valid for version 1")
+        if self.kv_engine_version == 1 and cas:
+            raise VaultError("The cas parameter is only valid for version 2")
+        if self.kv_engine_version == 1:
+            response = self.client.secrets.kv.v1.create_or_update_secret(
+                secret_path=secret_path, secret=secret, mount_point=self.mount_point, method=method)
+        else:
+            response = self.client.secrets.kv.v2.create_or_update_secret(
+                secret_path=secret_path, secret=secret, mount_point=self.mount_point, cas=cas)
+        return response
+
+
+class VaultHook(BaseHook):
+    """
+    HashiCorp Vault wrapper to Interact with HashiCorp Vault KeyValue Secret engine.
+
+    HashiCorp HVac documentation:
+       * https://hvac.readthedocs.io/en/stable/
+
+    You connect to the host specified as host in the connection. The login/password from the connection
+    are used as credentials usually and you can specify different authentication parameters
+    via init params or via corresponding extras in the connection.
+
+    The extras in the connection are named the same as the parameters (`mount_point`,'kv_engine_version' ...).
+
+    Login/Password are used as credentials:
+
+        * approle: password -> secret_id
+        * ldap: login -> username,   password -> password
+        * userpass: login -> username, password -> password
+
+    :param vault_conn_id: The id of the connection to use
+    :type vault_conn_id: str
+    :param auth_type: Authentication Type for Vault. Default is ``token``. Available values are in
+        :py:const:`airflow.providers.hashicorp.hooks.vault.VALID_AUTH_TYPES`.
+    :type auth_type: str
+    :param mount_point: The "path" the secret engine was mounted on. Default is "secret". Note that
+         this mount_point is not used for authentication if authentication is done via a
+         different engine.
+    :type mount_point: str
+    :param kv_engine_version: Select the version of the engine to run (``1`` or ``2``). Defaults to
+          version defined in connection or ``2`` if not defined in connection.
+    :type kv_engine_version: int
+    :param token: Authentication token to include in requests sent to Vault.
+        (for ``token`` and ``github`` auth_type)
+    :type token: str
+    :param role_id: Role ID for Authentication (for ``approle`` auth_type)
+    :type role_id: str
+    :param kubernetes_role: Role for Authentication (for ``kubernetes`` auth_type)
+    :type kubernetes_role: str
+    :param kubernetes_jwt_path: Path for kubernetes jwt token (for ``kubernetes`` auth_type, default:
+        ``/var/run/secrets/kubernetes.io/serviceaccount/token``)
+    :type kubernetes_jwt_path: str
+    :param gcp_key_path: Path to GCP Credential JSON file (for ``gcp`` auth_type)
+    :type gcp_key_path: str
+    :param gcp_scopes: Comma-separated string containing GCP scopes (for ``gcp`` auth_type)
+    :type gcp_scopes: str
+
+    """
+    def __init__(  # pylint: disable=too-many-arguments
+        self,
+        vault_conn_id: str,
+        auth_type: Optional[str] = None,
+        mount_point: Optional[str] = None,
+        kv_engine_version: Optional[int] = None,
+        token: Optional[str] = None,
+        role_id: Optional[str] = None,
+        kubernetes_role: Optional[str] = None,
+        kubernetes_jwt_path: Optional[str] = None,
+        gcp_key_path: Optional[str] = None,
+        gcp_scopes: Optional[str] = None,
+    ):
+        super().__init__()
+        self.connection = self.get_connection(vault_conn_id)
+
+        if not auth_type:
+            auth_type = self.connection.extra_dejson.get('auth_type') or "token"
+
+        if not mount_point:
+            mount_point = self.connection.extra_dejson.get('mount_point')
+        if not mount_point:
+            mount_point = 'secret'
+
+        if not kv_engine_version:
+            conn_version = self.connection.extra_dejson.get("kv_engine_version")
+            try:
+                kv_engine_version = int(conn_version) if conn_version else DEFAULT_KV_ENGINE_VERSION
+            except ValueError:
+                raise VaultError(f"The version is not an int: {conn_version}. ")
+
+        if auth_type in ["approle"]:
+            if not role_id:
+                role_id = self.connection.extra_dejson.get('role_id')
+
+        if auth_type in ['github', "token"]:
+            if not token:
+                token = self.connection.extra_dejson.get('token')
+        gcp_key_path, gcp_scopes = \
+            self._get_gcp_parameters_from_connection(gcp_key_path, gcp_scopes) \
+            if auth_type == 'gcp' else (None, None)
+        kubernetes_jwt_path, kubernetes_role = \
+            self._get_kubernetes_parameters_from_connection(kubernetes_jwt_path, kubernetes_role) \
+            if auth_type == 'kubernetes' else (None, None)
+
+        url = f"{self.connection.schema}://{self.connection.host}"
+        if self.connection.port:
+            url += f":{self.connection.port}"
+
+        self.vault_client = _VaultClient(
+            url=url,
+            auth_type=auth_type,
+            mount_point=mount_point,
+            kv_engine_version=kv_engine_version,
+            token=token,
+            username=self.connection.login,
+            password=self.connection.password,
+            secret_id=self.connection.password,
+            role_id=role_id,
+            kubernetes_role=kubernetes_role,
+            kubernetes_jwt_path=kubernetes_jwt_path,
+            gcp_key_path=gcp_key_path,
+            gcp_scopes=gcp_scopes,
+        )
+
+    def _get_kubernetes_parameters_from_connection(
+        self, kubernetes_jwt_path: Optional[str], kubernetes_role: Optional[str]) \
+            -> Tuple[str, Optional[str]]:
+        if not kubernetes_jwt_path:
+            kubernetes_jwt_path = self.connection.extra_dejson.get("kubernetes_jwt_path")
+            if not kubernetes_jwt_path:
+                kubernetes_jwt_path = DEFAULT_KUBERNETES_JWT_PATH
+        if not kubernetes_role:
+            kubernetes_role = self.connection.extra_dejson.get("kubernetes_role")
+        return kubernetes_jwt_path, kubernetes_role
+
+    def _get_gcp_parameters_from_connection(
+        self, gcp_key_path: Optional[str], gcp_scopes: Optional[str]) \
+            -> Tuple[Optional[str], Optional[str]]:
+        if not gcp_scopes:
+            gcp_scopes = self.connection.extra_dejson.get("gcp_scopes")
+        if not gcp_key_path:
+            gcp_key_path = self.connection.extra_dejson.get("gcp_key_path")
+        return gcp_key_path, gcp_scopes
+
+    def get_conn(self) -> hvac.Client:
+        """
+        Retrieves connection to Vault.
+
+        :rtype: hvac.Client
+        :return: connection used.
+        """
+        return self.vault_client.client
+
+    def get_secret(self, secret_path: str, secret_version: Optional[int] = None) -> Optional[dict]:
+        """
+        Get secret value from the engine.
+
+        :param secret_path: Path of the secret
+        :type secret_path: str
+        :param secret_version: Optional version of key to read - can only be used in case of version 2 of KV
+        :type secret_version: int
+
+        See https://hvac.readthedocs.io/en/stable/usage/secrets_engines/kv_v1.html
+        and https://hvac.readthedocs.io/en/stable/usage/secrets_engines/kv_v2.html for details.
+
+        :param secret_path: Path of the secret
+        :type secret_path: str
+        :rtype: dict
+        :return: secret stored in the vault as a dictionary
+        """
+        return self.vault_client.get_secret(secret_path=secret_path, secret_version=secret_version)
+
+    def get_secret_metadata(self, secret_path: str) -> Optional[dict]:
+        """
+        Reads secret metadata (including versions) from the engine. It is only valid for KV version 2.
+
+        :param secret_path: Path to read from
+        :type secret_path: str
+        :rtype: dict
+        :return: secret metadata. This is a Dict containing metadata for the secret.
+
+                 See https://hvac.readthedocs.io/en/stable/usage/secrets_engines/kv_v2.html for details.
+
+        """
+        return self.vault_client.get_secret_metadata(secret_path=secret_path)
+
+    def get_secret_including_metadata(self,
+                                      secret_path: str,
+                                      secret_version: Optional[int] = None) -> Optional[dict]:
+        """
+        Reads secret including metadata. It is only valid for KV version 2.
+
+        See https://hvac.readthedocs.io/en/stable/usage/secrets_engines/kv_v2.html for details.
+
+        :param secret_path: Path of the secret
+        :type secret_path: str
+        :param secret_version: Optional version of key to read - can only be used in case of version 2 of KV
+        :type secret_version: int
+        :rtype: dict
+        :return: key info. This is a Dict with "data" mapping keeping secret
+                 and "metadata" mapping keeping metadata of the secret.
+
+        """
+        return self.vault_client.get_secret_including_metadata(
+            secret_path=secret_path, secret_version=secret_version)
+
+    def create_or_update_secret(self,
+                                secret_path: str,
+                                secret: dict,
+                                method: Optional[str] = None,
+                                cas: Optional[int] = None) -> Response:
+        """
+        Creates or updates secret.
+
+        :param secret_path: Path to read from
+        :type secret_path: str
+        :param secret: Secret to create or update for the path specified
+        :type secret: dict
+        :param method: Optional parameter to explicitly request a POST (create) or PUT (update) request to
+            the selected kv secret engine. If no argument is provided for this parameter, hvac attempts to
+            intelligently determine which method is appropriate. Only valid for KV engine version 1
+        :type method: str
+        :param cas: Set the "cas" value to use a Check-And-Set operation. If not set the write will be
+            allowed. If set to 0 a write will only be allowed if the key doesn't exist.
+            If the index is non-zero the write will only be allowed if the key's current version
+            matches the version specified in the cas parameter. Only valid for KV engine version 2.
+        :type cas: int
+        :rtype: requests.Response
+        :return: The response of the create_or_update_secret request.
+
+                 See https://hvac.readthedocs.io/en/stable/usage/secrets_engines/kv_v1.html
+                 and https://hvac.readthedocs.io/en/stable/usage/secrets_engines/kv_v2.html for details.

Review comment:
       Same question here about how does this render.

##########
File path: airflow/providers/hashicorp/hooks/vault.py
##########
@@ -0,0 +1,546 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+"""Hook for HashiCorp Vault"""
+from typing import List, Optional, Tuple
+
+import hvac
+from cached_property import cached_property
+from hvac.exceptions import InvalidPath, VaultError
+from requests import Response
+
+from airflow.hooks.base_hook import BaseHook
+from airflow.utils.log.logging_mixin import LoggingMixin
+
+DEFAULT_KUBERNETES_JWT_PATH = '/var/run/secrets/kubernetes.io/serviceaccount/token'
+DEFAULT_KV_ENGINE_VERSION = 2
+
+
+VALID_KV_VERSIONS: List[int] = [1, 2]
+VALID_AUTH_TYPES: List[str] = [
+    'approle',
+    'github',
+    'gcp',
+    'kubernetes',
+    'ldap',
+    'token',
+    'userpass'
+]
+
+
+class _VaultClient(LoggingMixin):  # pylint: disable=too-many-instance-attributes
+    """
+    Retrieves Authenticated client from Hashicorp Vault. This is purely internal class promoting
+    authentication code reuse between the Hook an Secret, it should not be used directly in
+    Airflow DAGs. Use VaultBackend for backend integration and Hook in case you want to communicate
+    with VaultHook using standard Airflow Connection definition.
+
+    :param url: Base URL for the Vault instance being addressed.
+    :type url: str
+    :param auth_type: Authentication Type for Vault. Default is ``token``. Available values are in
+        :py:const:`airflow.providers.hashicorp.hooks.vault.VALID_AUTH_TYPES`.
+    :type auth_type: str
+    :param mount_point: The "path" the secret engine was mounted on. Default is "secret". Note that
+         this mount_point is not used for authentication if authentication is done via a
+         different engine.
+    :type mount_point: str
+    :param kv_engine_version: Selects the version of the engine to run (``1`` or ``2``, default: ``2``).
+    :type kv_engine_version: int
+    :param token: Authentication token to include in requests sent to Vault
+        (for ``token`` and ``github`` auth_type).
+    :type token: str
+    :param username: Username for Authentication (for ``ldap`` and ``userpass`` auth_types).
+    :type username: str
+    :param password: Password for Authentication (for ``ldap`` and ``userpass`` auth_types).
+    :type password: str
+    :param secret_id: Secret ID for Authentication (for ``approle`` auth_type).
+    :type secret_id: str
+    :param role_id: Role ID for Authentication (for ``approle`` auth_type).
+    :type role_id: str
+    :param kubernetes_role: Role for Authentication (for ``kubernetes`` auth_type).
+    :type kubernetes_role: str
+    :param kubernetes_jwt_path: Path for kubernetes jwt token (for ``kubernetes`` auth_type, default:
+        ``/var/run/secrets/kubernetes.io/serviceaccount/token``).
+    :type kubernetes_jwt_path: str
+    :param gcp_key_path: Path to GCP Credential JSON file (for ``gcp`` auth_type).
+    :type gcp_key_path: str
+    :param gcp_scopes: Comma-separated string containing GCP scopes (for ``gcp`` auth_type).
+    :type gcp_scopes: str
+    """
+    def __init__(  # pylint: disable=too-many-arguments
+        self,
+        url: Optional[str] = None,
+        auth_type: str = 'token',
+        mount_point: str = "secret",
+        kv_engine_version: Optional[int] = None,
+        token: Optional[str] = None,
+        username: Optional[str] = None,
+        password: Optional[str] = None,
+        secret_id: Optional[str] = None,
+        role_id: Optional[str] = None,
+        kubernetes_role: Optional[str] = None,
+        kubernetes_jwt_path: Optional[str] = '/var/run/secrets/kubernetes.io/serviceaccount/token',
+        gcp_key_path: Optional[str] = None,
+        gcp_scopes: Optional[str] = None,
+        **kwargs
+    ):
+        super().__init__(**kwargs)
+        if kv_engine_version and kv_engine_version not in VALID_KV_VERSIONS:
+            raise VaultError(f"The version is not supported: {kv_engine_version}. "
+                             f"It should be one of {VALID_KV_VERSIONS}")
+        if auth_type not in VALID_AUTH_TYPES:
+            raise VaultError(f"The auth_type is not supported: {auth_type}. "
+                             f"It should be one of {VALID_AUTH_TYPES}")
+        if auth_type == "token" and not token:
+            raise VaultError("The 'token' authentication type requires 'token'")
+        if auth_type == "github" and not token:
+            raise VaultError("The 'github' authentication type requires 'token'")
+        if auth_type == "approle" and not role_id:
+            raise VaultError("The 'approle' authentication type requires 'role_id'")
+        if auth_type == "kubernetes":
+            if not kubernetes_role:
+                raise VaultError("The 'kubernetes' authentication type requires 'kubernetes_role'")
+            if not kubernetes_jwt_path:
+                raise VaultError("The 'kubernetes' authentication type requires 'kubernetes_jwt_path'")
+
+        self.kv_engine_version = kv_engine_version if kv_engine_version else 2
+        self.url = url
+        self.auth_type = auth_type
+        self.kwargs = kwargs
+        self.token = token
+        self.mount_point = mount_point
+        self.username = username
+        self.password = password
+        self.secret_id = secret_id
+        self.role_id = role_id
+        self.kubernetes_role = kubernetes_role
+        self.kubernetes_jwt_path = kubernetes_jwt_path
+        self.gcp_key_path = gcp_key_path
+        self.gcp_scopes = gcp_scopes
+
+    @cached_property
+    def client(self) -> hvac.Client:
+        """
+        Return an authenticated Hashicorp Vault client.
+
+        :rtype: hvac.Client
+        :return: Vault Client
+
+        """
+        _client = hvac.Client(url=self.url, **self.kwargs)
+        if self.auth_type == "approle":
+            self._auth_approle(_client)
+        elif self.auth_type == "gcp":
+            self._auth_gcp(_client)
+        elif self.auth_type == "github":
+            self._auth_github(_client)
+        elif self.auth_type == "kubernetes":
+            self._auth_kubernetes(_client)
+        elif self.auth_type == "ldap":
+            self._auth_ldap(_client)
+        elif self.auth_type == "token":
+            _client.token = self.token
+        elif self.auth_type == "userpass":
+            self._auth_userpass(_client)
+        else:
+            raise VaultError(f"Authentication type '{self.auth_type}' not supported")
+
+        if _client.is_authenticated():
+            return _client
+        else:
+            raise VaultError("Vault Authentication Error!")
+
+    def _auth_userpass(self, _client: hvac.Client) -> None:
+        _client.auth_userpass(username=self.username, password=self.password)
+
+    def _auth_ldap(self, _client: hvac.Client) -> None:
+        _client.auth.ldap.login(
+            username=self.username, password=self.password)
+
+    def _auth_kubernetes(self, _client: hvac.Client) -> None:
+        if not self.kubernetes_jwt_path:
+            raise VaultError("The kubernetes_jwt_path should be set here. This should not happen.")
+        with open(self.kubernetes_jwt_path) as f:
+            jwt = f.read()
+            _client.auth_kubernetes(role=self.kubernetes_role, jwt=jwt)
+
+    def _auth_github(self, _client: hvac.Client) -> None:
+        _client.auth.github.login(token=self.token)
+
+    def _auth_gcp(self, _client: hvac.Client) -> None:
+        # noinspection PyProtectedMember
+        from airflow.providers.google.cloud.utils.credentials_provider import (
+            get_credentials_and_project_id,
+            _get_scopes
+        )
+        scopes = _get_scopes(self.gcp_scopes)
+        credentials, _ = get_credentials_and_project_id(key_path=self.gcp_key_path,
+                                                        scopes=scopes)
+        _client.auth.gcp.configure(credentials=credentials)
+
+    def _auth_approle(self, _client: hvac.Client) -> None:
+        _client.auth_approle(role_id=self.role_id, secret_id=self.secret_id)
+
+    def get_secret(self, secret_path: str, secret_version: Optional[int] = None) -> Optional[dict]:
+        """
+        Get secret value from the engine.
+
+        :param secret_path: The path of the secret.
+        :type secret_path: str
+        :param secret_version: Specifies the version of Secret to return. If not set, the latest
+            version is returned. (Can only be used in case of version 2 of KV).
+        :type secret_version: int
+
+        See https://hvac.readthedocs.io/en/stable/usage/secrets_engines/kv_v1.html
+        and https://hvac.readthedocs.io/en/stable/usage/secrets_engines/kv_v2.html for details.
+
+        :return: secret stored in the vault as a dictionary
+        """
+        try:
+            if self.kv_engine_version == 1:
+                if secret_version:
+                    raise VaultError("Secret version can only be used with version 2 of the KV engine")
+                response = self.client.secrets.kv.v1.read_secret(
+                    path=secret_path, mount_point=self.mount_point)
+            else:
+                response = self.client.secrets.kv.v2.read_secret_version(
+                    path=secret_path, mount_point=self.mount_point, version=secret_version)
+        except InvalidPath:
+            self.log.debug("Secret not found %s with mount point %s", secret_path, self.mount_point)
+            return None
+
+        return_data = response["data"] if self.kv_engine_version == 1 else response["data"]["data"]
+        return return_data
+
+    def get_secret_metadata(self, secret_path: str) -> Optional[dict]:
+        """
+        Reads secret metadata (including versions) from the engine. It is only valid for KV version 2.
+
+        :param secret_path: The path of the secret.
+        :type secret_path: str
+        :rtype: dict
+        :return: secret metadata. This is a Dict containing metadata for the secret.
+
+                 See https://hvac.readthedocs.io/en/stable/usage/secrets_engines/kv_v2.html for details.
+
+        """
+        if self.kv_engine_version == 1:
+            raise VaultError("Metadata might only be used with version 2 of the KV engine.")
+        try:
+            return self.client.secrets.kv.v2.read_secret_metadata(
+                path=secret_path,
+                mount_point=self.mount_point)
+        except InvalidPath:
+            self.log.debug("Secret not found %s with mount point %s", secret_path, self.mount_point)
+            return None
+
+    def get_secret_including_metadata(self,
+                                      secret_path: str,
+                                      secret_version: Optional[int] = None) -> Optional[dict]:
+        """
+        Reads secret including metadata. It is only valid for KV version 2.
+
+        See https://hvac.readthedocs.io/en/stable/usage/secrets_engines/kv_v2.html for details.
+
+        :param secret_path: The path of the secret.
+        :type secret_path: str
+        :param secret_version: Specifies the version of Secret to return. If not set, the latest
+            version is returned. (Can only be used in case of version 2 of KV).
+        :type secret_version: int
+        :rtype: dict
+        :return: The key info. This is a Dict with "data" mapping keeping secret
+                 and "metadata" mapping keeping metadata of the secret.
+        """
+        if self.kv_engine_version == 1:
+            raise VaultError("Metadata might only be used with version 2 of the KV engine.")
+        try:
+            return self.client.secrets.kv.v2.read_secret_version(
+                path=secret_path, mount_point=self.mount_point,
+                version=secret_version)
+        except InvalidPath:
+            self.log.debug("Secret not found %s with mount point %s and version %s",
+                           secret_path, self.mount_point, secret_version)
+            return None
+
+    def create_or_update_secret(self,
+                                secret_path: str,
+                                secret: dict,
+                                method: Optional[str] = None,
+                                cas: Optional[int] = None) -> Response:
+        """
+        Creates or updates secret.
+
+        :param secret_path: The path of the secret.
+        :type secret_path: str
+        :param secret: Secret to create or update for the path specified
+        :type secret: dict
+        :param method: Optional parameter to explicitly request a POST (create) or PUT (update) request to
+            the selected kv secret engine. If no argument is provided for this parameter, hvac attempts to
+            intelligently determine which method is appropriate. Only valid for KV engine version 1
+        :type method: str
+        :param cas: Set the "cas" value to use a Check-And-Set operation. If not set the write will be
+            allowed. If set to 0 a write will only be allowed if the key doesn't exist.
+            If the index is non-zero the write will only be allowed if the key's current version
+            matches the version specified in the cas parameter. Only valid for KV engine version 2.
+        :type cas: int
+        :rtype: requests.Response
+        :return: The response of the create_or_update_secret request.
+
+                 See https://hvac.readthedocs.io/en/stable/usage/secrets_engines/kv_v1.html
+                 and https://hvac.readthedocs.io/en/stable/usage/secrets_engines/kv_v2.html for details.
+
+        """
+        if self.kv_engine_version == 2 and method:
+            raise VaultError("The method parameter is only valid for version 1")
+        if self.kv_engine_version == 1 and cas:
+            raise VaultError("The cas parameter is only valid for version 2")
+        if self.kv_engine_version == 1:
+            response = self.client.secrets.kv.v1.create_or_update_secret(
+                secret_path=secret_path, secret=secret, mount_point=self.mount_point, method=method)
+        else:
+            response = self.client.secrets.kv.v2.create_or_update_secret(
+                secret_path=secret_path, secret=secret, mount_point=self.mount_point, cas=cas)
+        return response
+
+
+class VaultHook(BaseHook):
+    """
+    HashiCorp Vault wrapper to Interact with HashiCorp Vault KeyValue Secret engine.
+
+    HashiCorp HVac documentation:
+       * https://hvac.readthedocs.io/en/stable/
+
+    You connect to the host specified as host in the connection. The login/password from the connection
+    are used as credentials usually and you can specify different authentication parameters
+    via init params or via corresponding extras in the connection.
+
+    The extras in the connection are named the same as the parameters (`mount_point`,'kv_engine_version' ...).
+
+    Login/Password are used as credentials:
+
+        * approle: password -> secret_id
+        * ldap: login -> username,   password -> password
+        * userpass: login -> username, password -> password
+
+    :param vault_conn_id: The id of the connection to use
+    :type vault_conn_id: str
+    :param auth_type: Authentication Type for Vault. Default is ``token``. Available values are in
+        :py:const:`airflow.providers.hashicorp.hooks.vault.VALID_AUTH_TYPES`.
+    :type auth_type: str
+    :param mount_point: The "path" the secret engine was mounted on. Default is "secret". Note that
+         this mount_point is not used for authentication if authentication is done via a
+         different engine.
+    :type mount_point: str
+    :param kv_engine_version: Select the version of the engine to run (``1`` or ``2``). Defaults to
+          version defined in connection or ``2`` if not defined in connection.
+    :type kv_engine_version: int
+    :param token: Authentication token to include in requests sent to Vault.
+        (for ``token`` and ``github`` auth_type)
+    :type token: str
+    :param role_id: Role ID for Authentication (for ``approle`` auth_type)
+    :type role_id: str
+    :param kubernetes_role: Role for Authentication (for ``kubernetes`` auth_type)
+    :type kubernetes_role: str
+    :param kubernetes_jwt_path: Path for kubernetes jwt token (for ``kubernetes`` auth_type, default:
+        ``/var/run/secrets/kubernetes.io/serviceaccount/token``)
+    :type kubernetes_jwt_path: str
+    :param gcp_key_path: Path to GCP Credential JSON file (for ``gcp`` auth_type)
+    :type gcp_key_path: str
+    :param gcp_scopes: Comma-separated string containing GCP scopes (for ``gcp`` auth_type)
+    :type gcp_scopes: str
+
+    """
+    def __init__(  # pylint: disable=too-many-arguments
+        self,
+        vault_conn_id: str,
+        auth_type: Optional[str] = None,
+        mount_point: Optional[str] = None,
+        kv_engine_version: Optional[int] = None,
+        token: Optional[str] = None,
+        role_id: Optional[str] = None,
+        kubernetes_role: Optional[str] = None,
+        kubernetes_jwt_path: Optional[str] = None,
+        gcp_key_path: Optional[str] = None,
+        gcp_scopes: Optional[str] = None,
+    ):
+        super().__init__()
+        self.connection = self.get_connection(vault_conn_id)
+
+        if not auth_type:
+            auth_type = self.connection.extra_dejson.get('auth_type') or "token"
+
+        if not mount_point:
+            mount_point = self.connection.extra_dejson.get('mount_point')
+        if not mount_point:
+            mount_point = 'secret'
+
+        if not kv_engine_version:
+            conn_version = self.connection.extra_dejson.get("kv_engine_version")
+            try:
+                kv_engine_version = int(conn_version) if conn_version else DEFAULT_KV_ENGINE_VERSION
+            except ValueError:
+                raise VaultError(f"The version is not an int: {conn_version}. ")
+
+        if auth_type in ["approle"]:
+            if not role_id:
+                role_id = self.connection.extra_dejson.get('role_id')
+
+        if auth_type in ['github', "token"]:
+            if not token:
+                token = self.connection.extra_dejson.get('token')
+        gcp_key_path, gcp_scopes = \
+            self._get_gcp_parameters_from_connection(gcp_key_path, gcp_scopes) \
+            if auth_type == 'gcp' else (None, None)
+        kubernetes_jwt_path, kubernetes_role = \
+            self._get_kubernetes_parameters_from_connection(kubernetes_jwt_path, kubernetes_role) \
+            if auth_type == 'kubernetes' else (None, None)
+
+        url = f"{self.connection.schema}://{self.connection.host}"
+        if self.connection.port:
+            url += f":{self.connection.port}"
+
+        self.vault_client = _VaultClient(
+            url=url,
+            auth_type=auth_type,
+            mount_point=mount_point,
+            kv_engine_version=kv_engine_version,
+            token=token,
+            username=self.connection.login,
+            password=self.connection.password,
+            secret_id=self.connection.password,
+            role_id=role_id,
+            kubernetes_role=kubernetes_role,
+            kubernetes_jwt_path=kubernetes_jwt_path,
+            gcp_key_path=gcp_key_path,
+            gcp_scopes=gcp_scopes,
+        )
+
+    def _get_kubernetes_parameters_from_connection(
+        self, kubernetes_jwt_path: Optional[str], kubernetes_role: Optional[str]) \
+            -> Tuple[str, Optional[str]]:
+        if not kubernetes_jwt_path:
+            kubernetes_jwt_path = self.connection.extra_dejson.get("kubernetes_jwt_path")
+            if not kubernetes_jwt_path:
+                kubernetes_jwt_path = DEFAULT_KUBERNETES_JWT_PATH
+        if not kubernetes_role:
+            kubernetes_role = self.connection.extra_dejson.get("kubernetes_role")
+        return kubernetes_jwt_path, kubernetes_role
+
+    def _get_gcp_parameters_from_connection(
+        self, gcp_key_path: Optional[str], gcp_scopes: Optional[str]) \
+            -> Tuple[Optional[str], Optional[str]]:
+        if not gcp_scopes:
+            gcp_scopes = self.connection.extra_dejson.get("gcp_scopes")
+        if not gcp_key_path:
+            gcp_key_path = self.connection.extra_dejson.get("gcp_key_path")
+        return gcp_key_path, gcp_scopes
+
+    def get_conn(self) -> hvac.Client:
+        """
+        Retrieves connection to Vault.
+
+        :rtype: hvac.Client
+        :return: connection used.
+        """
+        return self.vault_client.client
+
+    def get_secret(self, secret_path: str, secret_version: Optional[int] = None) -> Optional[dict]:
+        """
+        Get secret value from the engine.
+
+        :param secret_path: Path of the secret
+        :type secret_path: str
+        :param secret_version: Optional version of key to read - can only be used in case of version 2 of KV
+        :type secret_version: int
+
+        See https://hvac.readthedocs.io/en/stable/usage/secrets_engines/kv_v1.html
+        and https://hvac.readthedocs.io/en/stable/usage/secrets_engines/kv_v2.html for details.
+
+        :param secret_path: Path of the secret
+        :type secret_path: str
+        :rtype: dict
+        :return: secret stored in the vault as a dictionary
+        """
+        return self.vault_client.get_secret(secret_path=secret_path, secret_version=secret_version)
+
+    def get_secret_metadata(self, secret_path: str) -> Optional[dict]:
+        """
+        Reads secret metadata (including versions) from the engine. It is only valid for KV version 2.
+
+        :param secret_path: Path to read from
+        :type secret_path: str
+        :rtype: dict
+        :return: secret metadata. This is a Dict containing metadata for the secret.
+
+                 See https://hvac.readthedocs.io/en/stable/usage/secrets_engines/kv_v2.html for details.
+
+        """
+        return self.vault_client.get_secret_metadata(secret_path=secret_path)
+
+    def get_secret_including_metadata(self,
+                                      secret_path: str,
+                                      secret_version: Optional[int] = None) -> Optional[dict]:
+        """
+        Reads secret including metadata. It is only valid for KV version 2.
+
+        See https://hvac.readthedocs.io/en/stable/usage/secrets_engines/kv_v2.html for details.
+
+        :param secret_path: Path of the secret
+        :type secret_path: str
+        :param secret_version: Optional version of key to read - can only be used in case of version 2 of KV
+        :type secret_version: int
+        :rtype: dict
+        :return: key info. This is a Dict with "data" mapping keeping secret
+                 and "metadata" mapping keeping metadata of the secret.

Review comment:
       ```suggestion
           :return: key info. This is a Dict with "data" mapping keeping secret
               and "metadata" mapping keeping metadata of the secret.
   ```
   
   I think is the correct indentation?

##########
File path: airflow/providers/hashicorp/hooks/vault.py
##########
@@ -0,0 +1,546 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+"""Hook for HashiCorp Vault"""
+from typing import List, Optional, Tuple
+
+import hvac
+from cached_property import cached_property
+from hvac.exceptions import InvalidPath, VaultError
+from requests import Response
+
+from airflow.hooks.base_hook import BaseHook
+from airflow.utils.log.logging_mixin import LoggingMixin
+
+DEFAULT_KUBERNETES_JWT_PATH = '/var/run/secrets/kubernetes.io/serviceaccount/token'
+DEFAULT_KV_ENGINE_VERSION = 2
+
+
+VALID_KV_VERSIONS: List[int] = [1, 2]
+VALID_AUTH_TYPES: List[str] = [

Review comment:
       (I'm never sure when mypy can workout the type and when we need to specify it. I'd have thought it could have guessed this case... :shrug:)

##########
File path: airflow/providers/hashicorp/hooks/vault.py
##########
@@ -0,0 +1,546 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+"""Hook for HashiCorp Vault"""
+from typing import List, Optional, Tuple
+
+import hvac
+from cached_property import cached_property
+from hvac.exceptions import InvalidPath, VaultError
+from requests import Response
+
+from airflow.hooks.base_hook import BaseHook
+from airflow.utils.log.logging_mixin import LoggingMixin
+
+DEFAULT_KUBERNETES_JWT_PATH = '/var/run/secrets/kubernetes.io/serviceaccount/token'
+DEFAULT_KV_ENGINE_VERSION = 2
+
+
+VALID_KV_VERSIONS: List[int] = [1, 2]
+VALID_AUTH_TYPES: List[str] = [
+    'approle',
+    'github',
+    'gcp',
+    'kubernetes',
+    'ldap',
+    'token',
+    'userpass'
+]
+
+
+class _VaultClient(LoggingMixin):  # pylint: disable=too-many-instance-attributes
+    """
+    Retrieves Authenticated client from Hashicorp Vault. This is purely internal class promoting
+    authentication code reuse between the Hook an Secret, it should not be used directly in
+    Airflow DAGs. Use VaultBackend for backend integration and Hook in case you want to communicate
+    with VaultHook using standard Airflow Connection definition.
+
+    :param url: Base URL for the Vault instance being addressed.
+    :type url: str
+    :param auth_type: Authentication Type for Vault. Default is ``token``. Available values are in
+        :py:const:`airflow.providers.hashicorp.hooks.vault.VALID_AUTH_TYPES`.
+    :type auth_type: str
+    :param mount_point: The "path" the secret engine was mounted on. Default is "secret". Note that
+         this mount_point is not used for authentication if authentication is done via a
+         different engine.
+    :type mount_point: str
+    :param kv_engine_version: Selects the version of the engine to run (``1`` or ``2``, default: ``2``).
+    :type kv_engine_version: int
+    :param token: Authentication token to include in requests sent to Vault
+        (for ``token`` and ``github`` auth_type).
+    :type token: str
+    :param username: Username for Authentication (for ``ldap`` and ``userpass`` auth_types).
+    :type username: str
+    :param password: Password for Authentication (for ``ldap`` and ``userpass`` auth_types).
+    :type password: str
+    :param secret_id: Secret ID for Authentication (for ``approle`` auth_type).
+    :type secret_id: str
+    :param role_id: Role ID for Authentication (for ``approle`` auth_type).
+    :type role_id: str
+    :param kubernetes_role: Role for Authentication (for ``kubernetes`` auth_type).
+    :type kubernetes_role: str
+    :param kubernetes_jwt_path: Path for kubernetes jwt token (for ``kubernetes`` auth_type, default:
+        ``/var/run/secrets/kubernetes.io/serviceaccount/token``).
+    :type kubernetes_jwt_path: str
+    :param gcp_key_path: Path to GCP Credential JSON file (for ``gcp`` auth_type).
+    :type gcp_key_path: str
+    :param gcp_scopes: Comma-separated string containing GCP scopes (for ``gcp`` auth_type).
+    :type gcp_scopes: str
+    """
+    def __init__(  # pylint: disable=too-many-arguments
+        self,
+        url: Optional[str] = None,
+        auth_type: str = 'token',
+        mount_point: str = "secret",
+        kv_engine_version: Optional[int] = None,
+        token: Optional[str] = None,
+        username: Optional[str] = None,
+        password: Optional[str] = None,
+        secret_id: Optional[str] = None,
+        role_id: Optional[str] = None,
+        kubernetes_role: Optional[str] = None,
+        kubernetes_jwt_path: Optional[str] = '/var/run/secrets/kubernetes.io/serviceaccount/token',
+        gcp_key_path: Optional[str] = None,
+        gcp_scopes: Optional[str] = None,
+        **kwargs
+    ):
+        super().__init__(**kwargs)
+        if kv_engine_version and kv_engine_version not in VALID_KV_VERSIONS:
+            raise VaultError(f"The version is not supported: {kv_engine_version}. "
+                             f"It should be one of {VALID_KV_VERSIONS}")
+        if auth_type not in VALID_AUTH_TYPES:
+            raise VaultError(f"The auth_type is not supported: {auth_type}. "
+                             f"It should be one of {VALID_AUTH_TYPES}")
+        if auth_type == "token" and not token:
+            raise VaultError("The 'token' authentication type requires 'token'")
+        if auth_type == "github" and not token:
+            raise VaultError("The 'github' authentication type requires 'token'")
+        if auth_type == "approle" and not role_id:
+            raise VaultError("The 'approle' authentication type requires 'role_id'")
+        if auth_type == "kubernetes":
+            if not kubernetes_role:
+                raise VaultError("The 'kubernetes' authentication type requires 'kubernetes_role'")
+            if not kubernetes_jwt_path:
+                raise VaultError("The 'kubernetes' authentication type requires 'kubernetes_jwt_path'")
+
+        self.kv_engine_version = kv_engine_version if kv_engine_version else 2
+        self.url = url
+        self.auth_type = auth_type
+        self.kwargs = kwargs
+        self.token = token
+        self.mount_point = mount_point
+        self.username = username
+        self.password = password
+        self.secret_id = secret_id
+        self.role_id = role_id
+        self.kubernetes_role = kubernetes_role
+        self.kubernetes_jwt_path = kubernetes_jwt_path
+        self.gcp_key_path = gcp_key_path
+        self.gcp_scopes = gcp_scopes
+
+    @cached_property
+    def client(self) -> hvac.Client:
+        """
+        Return an authenticated Hashicorp Vault client.
+
+        :rtype: hvac.Client
+        :return: Vault Client
+
+        """
+        _client = hvac.Client(url=self.url, **self.kwargs)
+        if self.auth_type == "approle":
+            self._auth_approle(_client)
+        elif self.auth_type == "gcp":
+            self._auth_gcp(_client)
+        elif self.auth_type == "github":
+            self._auth_github(_client)
+        elif self.auth_type == "kubernetes":
+            self._auth_kubernetes(_client)
+        elif self.auth_type == "ldap":
+            self._auth_ldap(_client)
+        elif self.auth_type == "token":
+            _client.token = self.token
+        elif self.auth_type == "userpass":
+            self._auth_userpass(_client)
+        else:
+            raise VaultError(f"Authentication type '{self.auth_type}' not supported")
+
+        if _client.is_authenticated():
+            return _client
+        else:
+            raise VaultError("Vault Authentication Error!")
+
+    def _auth_userpass(self, _client: hvac.Client) -> None:
+        _client.auth_userpass(username=self.username, password=self.password)
+
+    def _auth_ldap(self, _client: hvac.Client) -> None:
+        _client.auth.ldap.login(
+            username=self.username, password=self.password)
+
+    def _auth_kubernetes(self, _client: hvac.Client) -> None:
+        if not self.kubernetes_jwt_path:
+            raise VaultError("The kubernetes_jwt_path should be set here. This should not happen.")
+        with open(self.kubernetes_jwt_path) as f:
+            jwt = f.read()
+            _client.auth_kubernetes(role=self.kubernetes_role, jwt=jwt)
+
+    def _auth_github(self, _client: hvac.Client) -> None:
+        _client.auth.github.login(token=self.token)
+
+    def _auth_gcp(self, _client: hvac.Client) -> None:
+        # noinspection PyProtectedMember
+        from airflow.providers.google.cloud.utils.credentials_provider import (
+            get_credentials_and_project_id,
+            _get_scopes
+        )
+        scopes = _get_scopes(self.gcp_scopes)
+        credentials, _ = get_credentials_and_project_id(key_path=self.gcp_key_path,
+                                                        scopes=scopes)
+        _client.auth.gcp.configure(credentials=credentials)
+
+    def _auth_approle(self, _client: hvac.Client) -> None:
+        _client.auth_approle(role_id=self.role_id, secret_id=self.secret_id)
+
+    def get_secret(self, secret_path: str, secret_version: Optional[int] = None) -> Optional[dict]:
+        """
+        Get secret value from the engine.
+
+        :param secret_path: The path of the secret.
+        :type secret_path: str
+        :param secret_version: Specifies the version of Secret to return. If not set, the latest
+            version is returned. (Can only be used in case of version 2 of KV).
+        :type secret_version: int
+
+        See https://hvac.readthedocs.io/en/stable/usage/secrets_engines/kv_v1.html
+        and https://hvac.readthedocs.io/en/stable/usage/secrets_engines/kv_v2.html for details.
+
+        :return: secret stored in the vault as a dictionary
+        """
+        try:
+            if self.kv_engine_version == 1:
+                if secret_version:
+                    raise VaultError("Secret version can only be used with version 2 of the KV engine")
+                response = self.client.secrets.kv.v1.read_secret(
+                    path=secret_path, mount_point=self.mount_point)
+            else:
+                response = self.client.secrets.kv.v2.read_secret_version(
+                    path=secret_path, mount_point=self.mount_point, version=secret_version)
+        except InvalidPath:
+            self.log.debug("Secret not found %s with mount point %s", secret_path, self.mount_point)
+            return None
+
+        return_data = response["data"] if self.kv_engine_version == 1 else response["data"]["data"]
+        return return_data
+
+    def get_secret_metadata(self, secret_path: str) -> Optional[dict]:
+        """
+        Reads secret metadata (including versions) from the engine. It is only valid for KV version 2.
+
+        :param secret_path: The path of the secret.
+        :type secret_path: str
+        :rtype: dict
+        :return: secret metadata. This is a Dict containing metadata for the secret.
+
+                 See https://hvac.readthedocs.io/en/stable/usage/secrets_engines/kv_v2.html for details.
+
+        """
+        if self.kv_engine_version == 1:
+            raise VaultError("Metadata might only be used with version 2 of the KV engine.")
+        try:
+            return self.client.secrets.kv.v2.read_secret_metadata(
+                path=secret_path,
+                mount_point=self.mount_point)
+        except InvalidPath:
+            self.log.debug("Secret not found %s with mount point %s", secret_path, self.mount_point)
+            return None
+
+    def get_secret_including_metadata(self,
+                                      secret_path: str,
+                                      secret_version: Optional[int] = None) -> Optional[dict]:
+        """
+        Reads secret including metadata. It is only valid for KV version 2.
+
+        See https://hvac.readthedocs.io/en/stable/usage/secrets_engines/kv_v2.html for details.
+
+        :param secret_path: The path of the secret.
+        :type secret_path: str
+        :param secret_version: Specifies the version of Secret to return. If not set, the latest
+            version is returned. (Can only be used in case of version 2 of KV).
+        :type secret_version: int
+        :rtype: dict
+        :return: The key info. This is a Dict with "data" mapping keeping secret
+                 and "metadata" mapping keeping metadata of the secret.
+        """
+        if self.kv_engine_version == 1:
+            raise VaultError("Metadata might only be used with version 2 of the KV engine.")
+        try:
+            return self.client.secrets.kv.v2.read_secret_version(
+                path=secret_path, mount_point=self.mount_point,
+                version=secret_version)
+        except InvalidPath:
+            self.log.debug("Secret not found %s with mount point %s and version %s",
+                           secret_path, self.mount_point, secret_version)
+            return None
+
+    def create_or_update_secret(self,
+                                secret_path: str,
+                                secret: dict,
+                                method: Optional[str] = None,
+                                cas: Optional[int] = None) -> Response:
+        """
+        Creates or updates secret.
+
+        :param secret_path: The path of the secret.
+        :type secret_path: str
+        :param secret: Secret to create or update for the path specified
+        :type secret: dict
+        :param method: Optional parameter to explicitly request a POST (create) or PUT (update) request to
+            the selected kv secret engine. If no argument is provided for this parameter, hvac attempts to
+            intelligently determine which method is appropriate. Only valid for KV engine version 1
+        :type method: str
+        :param cas: Set the "cas" value to use a Check-And-Set operation. If not set the write will be
+            allowed. If set to 0 a write will only be allowed if the key doesn't exist.
+            If the index is non-zero the write will only be allowed if the key's current version
+            matches the version specified in the cas parameter. Only valid for KV engine version 2.
+        :type cas: int
+        :rtype: requests.Response
+        :return: The response of the create_or_update_secret request.
+
+                 See https://hvac.readthedocs.io/en/stable/usage/secrets_engines/kv_v1.html
+                 and https://hvac.readthedocs.io/en/stable/usage/secrets_engines/kv_v2.html for details.
+
+        """
+        if self.kv_engine_version == 2 and method:
+            raise VaultError("The method parameter is only valid for version 1")
+        if self.kv_engine_version == 1 and cas:
+            raise VaultError("The cas parameter is only valid for version 2")
+        if self.kv_engine_version == 1:
+            response = self.client.secrets.kv.v1.create_or_update_secret(
+                secret_path=secret_path, secret=secret, mount_point=self.mount_point, method=method)
+        else:
+            response = self.client.secrets.kv.v2.create_or_update_secret(
+                secret_path=secret_path, secret=secret, mount_point=self.mount_point, cas=cas)
+        return response
+
+
+class VaultHook(BaseHook):
+    """
+    HashiCorp Vault wrapper to Interact with HashiCorp Vault KeyValue Secret engine.
+
+    HashiCorp HVac documentation:
+       * https://hvac.readthedocs.io/en/stable/
+
+    You connect to the host specified as host in the connection. The login/password from the connection
+    are used as credentials usually and you can specify different authentication parameters
+    via init params or via corresponding extras in the connection.
+
+    The extras in the connection are named the same as the parameters (`mount_point`,'kv_engine_version' ...).
+
+    Login/Password are used as credentials:
+
+        * approle: password -> secret_id
+        * ldap: login -> username,   password -> password
+        * userpass: login -> username, password -> password
+
+    :param vault_conn_id: The id of the connection to use
+    :type vault_conn_id: str
+    :param auth_type: Authentication Type for Vault. Default is ``token``. Available values are in
+        :py:const:`airflow.providers.hashicorp.hooks.vault.VALID_AUTH_TYPES`.
+    :type auth_type: str
+    :param mount_point: The "path" the secret engine was mounted on. Default is "secret". Note that
+         this mount_point is not used for authentication if authentication is done via a
+         different engine.
+    :type mount_point: str
+    :param kv_engine_version: Select the version of the engine to run (``1`` or ``2``). Defaults to
+          version defined in connection or ``2`` if not defined in connection.
+    :type kv_engine_version: int
+    :param token: Authentication token to include in requests sent to Vault.
+        (for ``token`` and ``github`` auth_type)
+    :type token: str
+    :param role_id: Role ID for Authentication (for ``approle`` auth_type)
+    :type role_id: str
+    :param kubernetes_role: Role for Authentication (for ``kubernetes`` auth_type)
+    :type kubernetes_role: str
+    :param kubernetes_jwt_path: Path for kubernetes jwt token (for ``kubernetes`` auth_type, default:
+        ``/var/run/secrets/kubernetes.io/serviceaccount/token``)
+    :type kubernetes_jwt_path: str
+    :param gcp_key_path: Path to GCP Credential JSON file (for ``gcp`` auth_type)
+    :type gcp_key_path: str
+    :param gcp_scopes: Comma-separated string containing GCP scopes (for ``gcp`` auth_type)
+    :type gcp_scopes: str
+
+    """
+    def __init__(  # pylint: disable=too-many-arguments
+        self,
+        vault_conn_id: str,
+        auth_type: Optional[str] = None,
+        mount_point: Optional[str] = None,
+        kv_engine_version: Optional[int] = None,
+        token: Optional[str] = None,
+        role_id: Optional[str] = None,
+        kubernetes_role: Optional[str] = None,
+        kubernetes_jwt_path: Optional[str] = None,
+        gcp_key_path: Optional[str] = None,
+        gcp_scopes: Optional[str] = None,
+    ):
+        super().__init__()
+        self.connection = self.get_connection(vault_conn_id)
+
+        if not auth_type:
+            auth_type = self.connection.extra_dejson.get('auth_type') or "token"
+
+        if not mount_point:
+            mount_point = self.connection.extra_dejson.get('mount_point')
+        if not mount_point:
+            mount_point = 'secret'
+
+        if not kv_engine_version:
+            conn_version = self.connection.extra_dejson.get("kv_engine_version")
+            try:
+                kv_engine_version = int(conn_version) if conn_version else DEFAULT_KV_ENGINE_VERSION
+            except ValueError:
+                raise VaultError(f"The version is not an int: {conn_version}. ")
+
+        if auth_type in ["approle"]:
+            if not role_id:
+                role_id = self.connection.extra_dejson.get('role_id')
+
+        if auth_type in ['github', "token"]:
+            if not token:
+                token = self.connection.extra_dejson.get('token')
+        gcp_key_path, gcp_scopes = \
+            self._get_gcp_parameters_from_connection(gcp_key_path, gcp_scopes) \
+            if auth_type == 'gcp' else (None, None)
+        kubernetes_jwt_path, kubernetes_role = \
+            self._get_kubernetes_parameters_from_connection(kubernetes_jwt_path, kubernetes_role) \
+            if auth_type == 'kubernetes' else (None, None)
+
+        url = f"{self.connection.schema}://{self.connection.host}"
+        if self.connection.port:
+            url += f":{self.connection.port}"
+
+        self.vault_client = _VaultClient(
+            url=url,
+            auth_type=auth_type,
+            mount_point=mount_point,
+            kv_engine_version=kv_engine_version,
+            token=token,
+            username=self.connection.login,
+            password=self.connection.password,
+            secret_id=self.connection.password,
+            role_id=role_id,
+            kubernetes_role=kubernetes_role,
+            kubernetes_jwt_path=kubernetes_jwt_path,
+            gcp_key_path=gcp_key_path,
+            gcp_scopes=gcp_scopes,
+        )
+
+    def _get_kubernetes_parameters_from_connection(
+        self, kubernetes_jwt_path: Optional[str], kubernetes_role: Optional[str]) \
+            -> Tuple[str, Optional[str]]:
+        if not kubernetes_jwt_path:
+            kubernetes_jwt_path = self.connection.extra_dejson.get("kubernetes_jwt_path")
+            if not kubernetes_jwt_path:
+                kubernetes_jwt_path = DEFAULT_KUBERNETES_JWT_PATH
+        if not kubernetes_role:
+            kubernetes_role = self.connection.extra_dejson.get("kubernetes_role")
+        return kubernetes_jwt_path, kubernetes_role
+
+    def _get_gcp_parameters_from_connection(
+        self, gcp_key_path: Optional[str], gcp_scopes: Optional[str]) \
+            -> Tuple[Optional[str], Optional[str]]:

Review comment:
       ```suggestion
       def _get_gcp_parameters_from_connection(
           self,
           gcp_key_path: Optional[str],
           gcp_scopes: Optional[str],
       ) -> Tuple[Optional[str], Optional[str]]:
   ```
   
   I find this much easier to read -- I try to avoid using a `\` unless I just can't find a way around it. Thoughts?

##########
File path: airflow/providers/hashicorp/hooks/vault.py
##########
@@ -0,0 +1,546 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+"""Hook for HashiCorp Vault"""
+from typing import List, Optional, Tuple
+
+import hvac
+from cached_property import cached_property
+from hvac.exceptions import InvalidPath, VaultError
+from requests import Response
+
+from airflow.hooks.base_hook import BaseHook
+from airflow.utils.log.logging_mixin import LoggingMixin
+
+DEFAULT_KUBERNETES_JWT_PATH = '/var/run/secrets/kubernetes.io/serviceaccount/token'
+DEFAULT_KV_ENGINE_VERSION = 2
+
+
+VALID_KV_VERSIONS: List[int] = [1, 2]
+VALID_AUTH_TYPES: List[str] = [
+    'approle',
+    'github',
+    'gcp',
+    'kubernetes',
+    'ldap',
+    'token',
+    'userpass'
+]
+
+
+class _VaultClient(LoggingMixin):  # pylint: disable=too-many-instance-attributes
+    """
+    Retrieves Authenticated client from Hashicorp Vault. This is purely internal class promoting
+    authentication code reuse between the Hook an Secret, it should not be used directly in
+    Airflow DAGs. Use VaultBackend for backend integration and Hook in case you want to communicate
+    with VaultHook using standard Airflow Connection definition.
+
+    :param url: Base URL for the Vault instance being addressed.
+    :type url: str
+    :param auth_type: Authentication Type for Vault. Default is ``token``. Available values are in
+        :py:const:`airflow.providers.hashicorp.hooks.vault.VALID_AUTH_TYPES`.
+    :type auth_type: str
+    :param mount_point: The "path" the secret engine was mounted on. Default is "secret". Note that
+         this mount_point is not used for authentication if authentication is done via a
+         different engine.
+    :type mount_point: str
+    :param kv_engine_version: Selects the version of the engine to run (``1`` or ``2``, default: ``2``).
+    :type kv_engine_version: int
+    :param token: Authentication token to include in requests sent to Vault
+        (for ``token`` and ``github`` auth_type).
+    :type token: str
+    :param username: Username for Authentication (for ``ldap`` and ``userpass`` auth_types).
+    :type username: str
+    :param password: Password for Authentication (for ``ldap`` and ``userpass`` auth_types).
+    :type password: str
+    :param secret_id: Secret ID for Authentication (for ``approle`` auth_type).
+    :type secret_id: str
+    :param role_id: Role ID for Authentication (for ``approle`` auth_type).
+    :type role_id: str
+    :param kubernetes_role: Role for Authentication (for ``kubernetes`` auth_type).
+    :type kubernetes_role: str
+    :param kubernetes_jwt_path: Path for kubernetes jwt token (for ``kubernetes`` auth_type, default:
+        ``/var/run/secrets/kubernetes.io/serviceaccount/token``).
+    :type kubernetes_jwt_path: str
+    :param gcp_key_path: Path to GCP Credential JSON file (for ``gcp`` auth_type).
+    :type gcp_key_path: str
+    :param gcp_scopes: Comma-separated string containing GCP scopes (for ``gcp`` auth_type).
+    :type gcp_scopes: str
+    """
+    def __init__(  # pylint: disable=too-many-arguments
+        self,
+        url: Optional[str] = None,
+        auth_type: str = 'token',
+        mount_point: str = "secret",
+        kv_engine_version: Optional[int] = None,
+        token: Optional[str] = None,
+        username: Optional[str] = None,
+        password: Optional[str] = None,
+        secret_id: Optional[str] = None,
+        role_id: Optional[str] = None,
+        kubernetes_role: Optional[str] = None,
+        kubernetes_jwt_path: Optional[str] = '/var/run/secrets/kubernetes.io/serviceaccount/token',
+        gcp_key_path: Optional[str] = None,
+        gcp_scopes: Optional[str] = None,
+        **kwargs
+    ):
+        super().__init__(**kwargs)
+        if kv_engine_version and kv_engine_version not in VALID_KV_VERSIONS:
+            raise VaultError(f"The version is not supported: {kv_engine_version}. "
+                             f"It should be one of {VALID_KV_VERSIONS}")
+        if auth_type not in VALID_AUTH_TYPES:
+            raise VaultError(f"The auth_type is not supported: {auth_type}. "
+                             f"It should be one of {VALID_AUTH_TYPES}")
+        if auth_type == "token" and not token:
+            raise VaultError("The 'token' authentication type requires 'token'")
+        if auth_type == "github" and not token:
+            raise VaultError("The 'github' authentication type requires 'token'")
+        if auth_type == "approle" and not role_id:
+            raise VaultError("The 'approle' authentication type requires 'role_id'")
+        if auth_type == "kubernetes":
+            if not kubernetes_role:
+                raise VaultError("The 'kubernetes' authentication type requires 'kubernetes_role'")
+            if not kubernetes_jwt_path:
+                raise VaultError("The 'kubernetes' authentication type requires 'kubernetes_jwt_path'")
+
+        self.kv_engine_version = kv_engine_version if kv_engine_version else 2
+        self.url = url
+        self.auth_type = auth_type
+        self.kwargs = kwargs
+        self.token = token
+        self.mount_point = mount_point
+        self.username = username
+        self.password = password
+        self.secret_id = secret_id
+        self.role_id = role_id
+        self.kubernetes_role = kubernetes_role
+        self.kubernetes_jwt_path = kubernetes_jwt_path
+        self.gcp_key_path = gcp_key_path
+        self.gcp_scopes = gcp_scopes
+
+    @cached_property
+    def client(self) -> hvac.Client:
+        """
+        Return an authenticated Hashicorp Vault client.
+
+        :rtype: hvac.Client
+        :return: Vault Client
+
+        """
+        _client = hvac.Client(url=self.url, **self.kwargs)
+        if self.auth_type == "approle":
+            self._auth_approle(_client)
+        elif self.auth_type == "gcp":
+            self._auth_gcp(_client)
+        elif self.auth_type == "github":
+            self._auth_github(_client)
+        elif self.auth_type == "kubernetes":
+            self._auth_kubernetes(_client)
+        elif self.auth_type == "ldap":
+            self._auth_ldap(_client)
+        elif self.auth_type == "token":
+            _client.token = self.token
+        elif self.auth_type == "userpass":
+            self._auth_userpass(_client)
+        else:
+            raise VaultError(f"Authentication type '{self.auth_type}' not supported")
+
+        if _client.is_authenticated():
+            return _client
+        else:
+            raise VaultError("Vault Authentication Error!")
+
+    def _auth_userpass(self, _client: hvac.Client) -> None:
+        _client.auth_userpass(username=self.username, password=self.password)
+
+    def _auth_ldap(self, _client: hvac.Client) -> None:
+        _client.auth.ldap.login(
+            username=self.username, password=self.password)
+
+    def _auth_kubernetes(self, _client: hvac.Client) -> None:
+        if not self.kubernetes_jwt_path:
+            raise VaultError("The kubernetes_jwt_path should be set here. This should not happen.")
+        with open(self.kubernetes_jwt_path) as f:
+            jwt = f.read()
+            _client.auth_kubernetes(role=self.kubernetes_role, jwt=jwt)
+
+    def _auth_github(self, _client: hvac.Client) -> None:
+        _client.auth.github.login(token=self.token)
+
+    def _auth_gcp(self, _client: hvac.Client) -> None:
+        # noinspection PyProtectedMember
+        from airflow.providers.google.cloud.utils.credentials_provider import (
+            get_credentials_and_project_id,
+            _get_scopes
+        )
+        scopes = _get_scopes(self.gcp_scopes)
+        credentials, _ = get_credentials_and_project_id(key_path=self.gcp_key_path,
+                                                        scopes=scopes)
+        _client.auth.gcp.configure(credentials=credentials)
+
+    def _auth_approle(self, _client: hvac.Client) -> None:
+        _client.auth_approle(role_id=self.role_id, secret_id=self.secret_id)
+
+    def get_secret(self, secret_path: str, secret_version: Optional[int] = None) -> Optional[dict]:
+        """
+        Get secret value from the engine.
+
+        :param secret_path: The path of the secret.
+        :type secret_path: str
+        :param secret_version: Specifies the version of Secret to return. If not set, the latest
+            version is returned. (Can only be used in case of version 2 of KV).
+        :type secret_version: int
+
+        See https://hvac.readthedocs.io/en/stable/usage/secrets_engines/kv_v1.html
+        and https://hvac.readthedocs.io/en/stable/usage/secrets_engines/kv_v2.html for details.
+
+        :return: secret stored in the vault as a dictionary
+        """
+        try:
+            if self.kv_engine_version == 1:
+                if secret_version:
+                    raise VaultError("Secret version can only be used with version 2 of the KV engine")
+                response = self.client.secrets.kv.v1.read_secret(
+                    path=secret_path, mount_point=self.mount_point)
+            else:
+                response = self.client.secrets.kv.v2.read_secret_version(
+                    path=secret_path, mount_point=self.mount_point, version=secret_version)
+        except InvalidPath:
+            self.log.debug("Secret not found %s with mount point %s", secret_path, self.mount_point)
+            return None
+
+        return_data = response["data"] if self.kv_engine_version == 1 else response["data"]["data"]
+        return return_data
+
+    def get_secret_metadata(self, secret_path: str) -> Optional[dict]:
+        """
+        Reads secret metadata (including versions) from the engine. It is only valid for KV version 2.
+
+        :param secret_path: The path of the secret.
+        :type secret_path: str
+        :rtype: dict
+        :return: secret metadata. This is a Dict containing metadata for the secret.
+
+                 See https://hvac.readthedocs.io/en/stable/usage/secrets_engines/kv_v2.html for details.
+
+        """
+        if self.kv_engine_version == 1:
+            raise VaultError("Metadata might only be used with version 2 of the KV engine.")
+        try:
+            return self.client.secrets.kv.v2.read_secret_metadata(
+                path=secret_path,
+                mount_point=self.mount_point)
+        except InvalidPath:
+            self.log.debug("Secret not found %s with mount point %s", secret_path, self.mount_point)
+            return None
+
+    def get_secret_including_metadata(self,
+                                      secret_path: str,
+                                      secret_version: Optional[int] = None) -> Optional[dict]:
+        """
+        Reads secret including metadata. It is only valid for KV version 2.
+
+        See https://hvac.readthedocs.io/en/stable/usage/secrets_engines/kv_v2.html for details.
+
+        :param secret_path: The path of the secret.
+        :type secret_path: str
+        :param secret_version: Specifies the version of Secret to return. If not set, the latest
+            version is returned. (Can only be used in case of version 2 of KV).
+        :type secret_version: int
+        :rtype: dict
+        :return: The key info. This is a Dict with "data" mapping keeping secret
+                 and "metadata" mapping keeping metadata of the secret.
+        """
+        if self.kv_engine_version == 1:
+            raise VaultError("Metadata might only be used with version 2 of the KV engine.")
+        try:
+            return self.client.secrets.kv.v2.read_secret_version(
+                path=secret_path, mount_point=self.mount_point,
+                version=secret_version)
+        except InvalidPath:
+            self.log.debug("Secret not found %s with mount point %s and version %s",
+                           secret_path, self.mount_point, secret_version)
+            return None
+
+    def create_or_update_secret(self,
+                                secret_path: str,
+                                secret: dict,
+                                method: Optional[str] = None,
+                                cas: Optional[int] = None) -> Response:
+        """
+        Creates or updates secret.
+
+        :param secret_path: The path of the secret.
+        :type secret_path: str
+        :param secret: Secret to create or update for the path specified
+        :type secret: dict
+        :param method: Optional parameter to explicitly request a POST (create) or PUT (update) request to
+            the selected kv secret engine. If no argument is provided for this parameter, hvac attempts to
+            intelligently determine which method is appropriate. Only valid for KV engine version 1
+        :type method: str
+        :param cas: Set the "cas" value to use a Check-And-Set operation. If not set the write will be
+            allowed. If set to 0 a write will only be allowed if the key doesn't exist.
+            If the index is non-zero the write will only be allowed if the key's current version
+            matches the version specified in the cas parameter. Only valid for KV engine version 2.
+        :type cas: int
+        :rtype: requests.Response
+        :return: The response of the create_or_update_secret request.
+
+                 See https://hvac.readthedocs.io/en/stable/usage/secrets_engines/kv_v1.html
+                 and https://hvac.readthedocs.io/en/stable/usage/secrets_engines/kv_v2.html for details.
+
+        """
+        if self.kv_engine_version == 2 and method:
+            raise VaultError("The method parameter is only valid for version 1")
+        if self.kv_engine_version == 1 and cas:
+            raise VaultError("The cas parameter is only valid for version 2")
+        if self.kv_engine_version == 1:
+            response = self.client.secrets.kv.v1.create_or_update_secret(
+                secret_path=secret_path, secret=secret, mount_point=self.mount_point, method=method)
+        else:
+            response = self.client.secrets.kv.v2.create_or_update_secret(
+                secret_path=secret_path, secret=secret, mount_point=self.mount_point, cas=cas)
+        return response
+
+
+class VaultHook(BaseHook):
+    """
+    HashiCorp Vault wrapper to Interact with HashiCorp Vault KeyValue Secret engine.
+
+    HashiCorp HVac documentation:
+       * https://hvac.readthedocs.io/en/stable/
+
+    You connect to the host specified as host in the connection. The login/password from the connection
+    are used as credentials usually and you can specify different authentication parameters
+    via init params or via corresponding extras in the connection.
+
+    The extras in the connection are named the same as the parameters (`mount_point`,'kv_engine_version' ...).
+
+    Login/Password are used as credentials:
+
+        * approle: password -> secret_id
+        * ldap: login -> username,   password -> password
+        * userpass: login -> username, password -> password
+
+    :param vault_conn_id: The id of the connection to use
+    :type vault_conn_id: str
+    :param auth_type: Authentication Type for Vault. Default is ``token``. Available values are in
+        :py:const:`airflow.providers.hashicorp.hooks.vault.VALID_AUTH_TYPES`.
+    :type auth_type: str
+    :param mount_point: The "path" the secret engine was mounted on. Default is "secret". Note that
+         this mount_point is not used for authentication if authentication is done via a
+         different engine.
+    :type mount_point: str
+    :param kv_engine_version: Select the version of the engine to run (``1`` or ``2``). Defaults to
+          version defined in connection or ``2`` if not defined in connection.
+    :type kv_engine_version: int
+    :param token: Authentication token to include in requests sent to Vault.
+        (for ``token`` and ``github`` auth_type)
+    :type token: str
+    :param role_id: Role ID for Authentication (for ``approle`` auth_type)
+    :type role_id: str
+    :param kubernetes_role: Role for Authentication (for ``kubernetes`` auth_type)
+    :type kubernetes_role: str
+    :param kubernetes_jwt_path: Path for kubernetes jwt token (for ``kubernetes`` auth_type, default:
+        ``/var/run/secrets/kubernetes.io/serviceaccount/token``)
+    :type kubernetes_jwt_path: str
+    :param gcp_key_path: Path to GCP Credential JSON file (for ``gcp`` auth_type)
+    :type gcp_key_path: str
+    :param gcp_scopes: Comma-separated string containing GCP scopes (for ``gcp`` auth_type)
+    :type gcp_scopes: str
+
+    """
+    def __init__(  # pylint: disable=too-many-arguments
+        self,
+        vault_conn_id: str,
+        auth_type: Optional[str] = None,
+        mount_point: Optional[str] = None,
+        kv_engine_version: Optional[int] = None,
+        token: Optional[str] = None,
+        role_id: Optional[str] = None,
+        kubernetes_role: Optional[str] = None,
+        kubernetes_jwt_path: Optional[str] = None,
+        gcp_key_path: Optional[str] = None,
+        gcp_scopes: Optional[str] = None,
+    ):
+        super().__init__()
+        self.connection = self.get_connection(vault_conn_id)
+
+        if not auth_type:
+            auth_type = self.connection.extra_dejson.get('auth_type') or "token"
+
+        if not mount_point:
+            mount_point = self.connection.extra_dejson.get('mount_point')
+        if not mount_point:
+            mount_point = 'secret'
+
+        if not kv_engine_version:
+            conn_version = self.connection.extra_dejson.get("kv_engine_version")
+            try:
+                kv_engine_version = int(conn_version) if conn_version else DEFAULT_KV_ENGINE_VERSION
+            except ValueError:
+                raise VaultError(f"The version is not an int: {conn_version}. ")
+
+        if auth_type in ["approle"]:
+            if not role_id:
+                role_id = self.connection.extra_dejson.get('role_id')
+
+        if auth_type in ['github', "token"]:
+            if not token:
+                token = self.connection.extra_dejson.get('token')
+        gcp_key_path, gcp_scopes = \
+            self._get_gcp_parameters_from_connection(gcp_key_path, gcp_scopes) \
+            if auth_type == 'gcp' else (None, None)
+        kubernetes_jwt_path, kubernetes_role = \
+            self._get_kubernetes_parameters_from_connection(kubernetes_jwt_path, kubernetes_role) \
+            if auth_type == 'kubernetes' else (None, None)
+
+        url = f"{self.connection.schema}://{self.connection.host}"
+        if self.connection.port:
+            url += f":{self.connection.port}"
+
+        self.vault_client = _VaultClient(
+            url=url,
+            auth_type=auth_type,
+            mount_point=mount_point,
+            kv_engine_version=kv_engine_version,
+            token=token,
+            username=self.connection.login,
+            password=self.connection.password,
+            secret_id=self.connection.password,
+            role_id=role_id,
+            kubernetes_role=kubernetes_role,
+            kubernetes_jwt_path=kubernetes_jwt_path,
+            gcp_key_path=gcp_key_path,
+            gcp_scopes=gcp_scopes,
+        )
+
+    def _get_kubernetes_parameters_from_connection(
+        self, kubernetes_jwt_path: Optional[str], kubernetes_role: Optional[str]) \
+            -> Tuple[str, Optional[str]]:
+        if not kubernetes_jwt_path:
+            kubernetes_jwt_path = self.connection.extra_dejson.get("kubernetes_jwt_path")
+            if not kubernetes_jwt_path:
+                kubernetes_jwt_path = DEFAULT_KUBERNETES_JWT_PATH
+        if not kubernetes_role:
+            kubernetes_role = self.connection.extra_dejson.get("kubernetes_role")
+        return kubernetes_jwt_path, kubernetes_role
+
+    def _get_gcp_parameters_from_connection(
+        self, gcp_key_path: Optional[str], gcp_scopes: Optional[str]) \
+            -> Tuple[Optional[str], Optional[str]]:
+        if not gcp_scopes:
+            gcp_scopes = self.connection.extra_dejson.get("gcp_scopes")
+        if not gcp_key_path:
+            gcp_key_path = self.connection.extra_dejson.get("gcp_key_path")
+        return gcp_key_path, gcp_scopes
+
+    def get_conn(self) -> hvac.Client:
+        """
+        Retrieves connection to Vault.
+
+        :rtype: hvac.Client
+        :return: connection used.
+        """
+        return self.vault_client.client
+
+    def get_secret(self, secret_path: str, secret_version: Optional[int] = None) -> Optional[dict]:
+        """
+        Get secret value from the engine.
+
+        :param secret_path: Path of the secret
+        :type secret_path: str
+        :param secret_version: Optional version of key to read - can only be used in case of version 2 of KV
+        :type secret_version: int
+
+        See https://hvac.readthedocs.io/en/stable/usage/secrets_engines/kv_v1.html
+        and https://hvac.readthedocs.io/en/stable/usage/secrets_engines/kv_v2.html for details.
+
+        :param secret_path: Path of the secret
+        :type secret_path: str
+        :rtype: dict
+        :return: secret stored in the vault as a dictionary
+        """
+        return self.vault_client.get_secret(secret_path=secret_path, secret_version=secret_version)
+
+    def get_secret_metadata(self, secret_path: str) -> Optional[dict]:
+        """
+        Reads secret metadata (including versions) from the engine. It is only valid for KV version 2.
+
+        :param secret_path: Path to read from
+        :type secret_path: str
+        :rtype: dict
+        :return: secret metadata. This is a Dict containing metadata for the secret.
+
+                 See https://hvac.readthedocs.io/en/stable/usage/secrets_engines/kv_v2.html for details.

Review comment:
       How does this line render in the docs?

##########
File path: airflow/providers/hashicorp/hooks/vault.py
##########
@@ -0,0 +1,546 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+"""Hook for HashiCorp Vault"""
+from typing import List, Optional, Tuple
+
+import hvac
+from cached_property import cached_property
+from hvac.exceptions import InvalidPath, VaultError
+from requests import Response
+
+from airflow.hooks.base_hook import BaseHook
+from airflow.utils.log.logging_mixin import LoggingMixin
+
+DEFAULT_KUBERNETES_JWT_PATH = '/var/run/secrets/kubernetes.io/serviceaccount/token'
+DEFAULT_KV_ENGINE_VERSION = 2
+
+
+VALID_KV_VERSIONS: List[int] = [1, 2]
+VALID_AUTH_TYPES: List[str] = [
+    'approle',
+    'github',
+    'gcp',
+    'kubernetes',
+    'ldap',
+    'token',
+    'userpass'
+]
+
+
+class _VaultClient(LoggingMixin):  # pylint: disable=too-many-instance-attributes
+    """
+    Retrieves Authenticated client from Hashicorp Vault. This is purely internal class promoting
+    authentication code reuse between the Hook an Secret, it should not be used directly in
+    Airflow DAGs. Use VaultBackend for backend integration and Hook in case you want to communicate
+    with VaultHook using standard Airflow Connection definition.
+
+    :param url: Base URL for the Vault instance being addressed.
+    :type url: str
+    :param auth_type: Authentication Type for Vault. Default is ``token``. Available values are in
+        :py:const:`airflow.providers.hashicorp.hooks.vault.VALID_AUTH_TYPES`.
+    :type auth_type: str
+    :param mount_point: The "path" the secret engine was mounted on. Default is "secret". Note that
+         this mount_point is not used for authentication if authentication is done via a
+         different engine.
+    :type mount_point: str
+    :param kv_engine_version: Selects the version of the engine to run (``1`` or ``2``, default: ``2``).
+    :type kv_engine_version: int
+    :param token: Authentication token to include in requests sent to Vault
+        (for ``token`` and ``github`` auth_type).
+    :type token: str
+    :param username: Username for Authentication (for ``ldap`` and ``userpass`` auth_types).
+    :type username: str
+    :param password: Password for Authentication (for ``ldap`` and ``userpass`` auth_types).
+    :type password: str
+    :param secret_id: Secret ID for Authentication (for ``approle`` auth_type).
+    :type secret_id: str
+    :param role_id: Role ID for Authentication (for ``approle`` auth_type).
+    :type role_id: str
+    :param kubernetes_role: Role for Authentication (for ``kubernetes`` auth_type).
+    :type kubernetes_role: str
+    :param kubernetes_jwt_path: Path for kubernetes jwt token (for ``kubernetes`` auth_type, default:
+        ``/var/run/secrets/kubernetes.io/serviceaccount/token``).
+    :type kubernetes_jwt_path: str
+    :param gcp_key_path: Path to GCP Credential JSON file (for ``gcp`` auth_type).
+    :type gcp_key_path: str
+    :param gcp_scopes: Comma-separated string containing GCP scopes (for ``gcp`` auth_type).
+    :type gcp_scopes: str
+    """
+    def __init__(  # pylint: disable=too-many-arguments
+        self,
+        url: Optional[str] = None,
+        auth_type: str = 'token',
+        mount_point: str = "secret",
+        kv_engine_version: Optional[int] = None,
+        token: Optional[str] = None,
+        username: Optional[str] = None,
+        password: Optional[str] = None,
+        secret_id: Optional[str] = None,
+        role_id: Optional[str] = None,
+        kubernetes_role: Optional[str] = None,
+        kubernetes_jwt_path: Optional[str] = '/var/run/secrets/kubernetes.io/serviceaccount/token',
+        gcp_key_path: Optional[str] = None,
+        gcp_scopes: Optional[str] = None,
+        **kwargs
+    ):
+        super().__init__(**kwargs)
+        if kv_engine_version and kv_engine_version not in VALID_KV_VERSIONS:
+            raise VaultError(f"The version is not supported: {kv_engine_version}. "
+                             f"It should be one of {VALID_KV_VERSIONS}")
+        if auth_type not in VALID_AUTH_TYPES:
+            raise VaultError(f"The auth_type is not supported: {auth_type}. "
+                             f"It should be one of {VALID_AUTH_TYPES}")
+        if auth_type == "token" and not token:
+            raise VaultError("The 'token' authentication type requires 'token'")
+        if auth_type == "github" and not token:
+            raise VaultError("The 'github' authentication type requires 'token'")
+        if auth_type == "approle" and not role_id:
+            raise VaultError("The 'approle' authentication type requires 'role_id'")
+        if auth_type == "kubernetes":
+            if not kubernetes_role:
+                raise VaultError("The 'kubernetes' authentication type requires 'kubernetes_role'")
+            if not kubernetes_jwt_path:
+                raise VaultError("The 'kubernetes' authentication type requires 'kubernetes_jwt_path'")
+
+        self.kv_engine_version = kv_engine_version if kv_engine_version else 2
+        self.url = url
+        self.auth_type = auth_type
+        self.kwargs = kwargs
+        self.token = token
+        self.mount_point = mount_point
+        self.username = username
+        self.password = password
+        self.secret_id = secret_id
+        self.role_id = role_id
+        self.kubernetes_role = kubernetes_role
+        self.kubernetes_jwt_path = kubernetes_jwt_path
+        self.gcp_key_path = gcp_key_path
+        self.gcp_scopes = gcp_scopes
+
+    @cached_property
+    def client(self) -> hvac.Client:
+        """
+        Return an authenticated Hashicorp Vault client.
+
+        :rtype: hvac.Client
+        :return: Vault Client
+
+        """
+        _client = hvac.Client(url=self.url, **self.kwargs)
+        if self.auth_type == "approle":
+            self._auth_approle(_client)
+        elif self.auth_type == "gcp":
+            self._auth_gcp(_client)
+        elif self.auth_type == "github":
+            self._auth_github(_client)
+        elif self.auth_type == "kubernetes":
+            self._auth_kubernetes(_client)
+        elif self.auth_type == "ldap":
+            self._auth_ldap(_client)
+        elif self.auth_type == "token":
+            _client.token = self.token
+        elif self.auth_type == "userpass":
+            self._auth_userpass(_client)
+        else:
+            raise VaultError(f"Authentication type '{self.auth_type}' not supported")
+
+        if _client.is_authenticated():
+            return _client
+        else:
+            raise VaultError("Vault Authentication Error!")
+
+    def _auth_userpass(self, _client: hvac.Client) -> None:
+        _client.auth_userpass(username=self.username, password=self.password)
+
+    def _auth_ldap(self, _client: hvac.Client) -> None:
+        _client.auth.ldap.login(
+            username=self.username, password=self.password)
+
+    def _auth_kubernetes(self, _client: hvac.Client) -> None:
+        if not self.kubernetes_jwt_path:
+            raise VaultError("The kubernetes_jwt_path should be set here. This should not happen.")
+        with open(self.kubernetes_jwt_path) as f:
+            jwt = f.read()
+            _client.auth_kubernetes(role=self.kubernetes_role, jwt=jwt)
+
+    def _auth_github(self, _client: hvac.Client) -> None:
+        _client.auth.github.login(token=self.token)
+
+    def _auth_gcp(self, _client: hvac.Client) -> None:
+        # noinspection PyProtectedMember
+        from airflow.providers.google.cloud.utils.credentials_provider import (
+            get_credentials_and_project_id,
+            _get_scopes
+        )
+        scopes = _get_scopes(self.gcp_scopes)
+        credentials, _ = get_credentials_and_project_id(key_path=self.gcp_key_path,
+                                                        scopes=scopes)
+        _client.auth.gcp.configure(credentials=credentials)
+
+    def _auth_approle(self, _client: hvac.Client) -> None:
+        _client.auth_approle(role_id=self.role_id, secret_id=self.secret_id)
+
+    def get_secret(self, secret_path: str, secret_version: Optional[int] = None) -> Optional[dict]:
+        """
+        Get secret value from the engine.
+
+        :param secret_path: The path of the secret.
+        :type secret_path: str
+        :param secret_version: Specifies the version of Secret to return. If not set, the latest
+            version is returned. (Can only be used in case of version 2 of KV).
+        :type secret_version: int
+
+        See https://hvac.readthedocs.io/en/stable/usage/secrets_engines/kv_v1.html
+        and https://hvac.readthedocs.io/en/stable/usage/secrets_engines/kv_v2.html for details.
+
+        :return: secret stored in the vault as a dictionary
+        """
+        try:
+            if self.kv_engine_version == 1:
+                if secret_version:
+                    raise VaultError("Secret version can only be used with version 2 of the KV engine")
+                response = self.client.secrets.kv.v1.read_secret(
+                    path=secret_path, mount_point=self.mount_point)
+            else:
+                response = self.client.secrets.kv.v2.read_secret_version(
+                    path=secret_path, mount_point=self.mount_point, version=secret_version)
+        except InvalidPath:
+            self.log.debug("Secret not found %s with mount point %s", secret_path, self.mount_point)
+            return None
+
+        return_data = response["data"] if self.kv_engine_version == 1 else response["data"]["data"]
+        return return_data
+
+    def get_secret_metadata(self, secret_path: str) -> Optional[dict]:
+        """
+        Reads secret metadata (including versions) from the engine. It is only valid for KV version 2.
+
+        :param secret_path: The path of the secret.
+        :type secret_path: str
+        :rtype: dict
+        :return: secret metadata. This is a Dict containing metadata for the secret.
+
+                 See https://hvac.readthedocs.io/en/stable/usage/secrets_engines/kv_v2.html for details.
+
+        """
+        if self.kv_engine_version == 1:
+            raise VaultError("Metadata might only be used with version 2 of the KV engine.")
+        try:
+            return self.client.secrets.kv.v2.read_secret_metadata(
+                path=secret_path,
+                mount_point=self.mount_point)
+        except InvalidPath:
+            self.log.debug("Secret not found %s with mount point %s", secret_path, self.mount_point)
+            return None
+
+    def get_secret_including_metadata(self,
+                                      secret_path: str,
+                                      secret_version: Optional[int] = None) -> Optional[dict]:
+        """
+        Reads secret including metadata. It is only valid for KV version 2.
+
+        See https://hvac.readthedocs.io/en/stable/usage/secrets_engines/kv_v2.html for details.
+
+        :param secret_path: The path of the secret.
+        :type secret_path: str
+        :param secret_version: Specifies the version of Secret to return. If not set, the latest
+            version is returned. (Can only be used in case of version 2 of KV).
+        :type secret_version: int
+        :rtype: dict
+        :return: The key info. This is a Dict with "data" mapping keeping secret
+                 and "metadata" mapping keeping metadata of the secret.
+        """
+        if self.kv_engine_version == 1:
+            raise VaultError("Metadata might only be used with version 2 of the KV engine.")
+        try:
+            return self.client.secrets.kv.v2.read_secret_version(
+                path=secret_path, mount_point=self.mount_point,
+                version=secret_version)
+        except InvalidPath:
+            self.log.debug("Secret not found %s with mount point %s and version %s",
+                           secret_path, self.mount_point, secret_version)
+            return None
+
+    def create_or_update_secret(self,
+                                secret_path: str,
+                                secret: dict,
+                                method: Optional[str] = None,
+                                cas: Optional[int] = None) -> Response:
+        """
+        Creates or updates secret.
+
+        :param secret_path: The path of the secret.
+        :type secret_path: str
+        :param secret: Secret to create or update for the path specified
+        :type secret: dict
+        :param method: Optional parameter to explicitly request a POST (create) or PUT (update) request to
+            the selected kv secret engine. If no argument is provided for this parameter, hvac attempts to
+            intelligently determine which method is appropriate. Only valid for KV engine version 1
+        :type method: str
+        :param cas: Set the "cas" value to use a Check-And-Set operation. If not set the write will be
+            allowed. If set to 0 a write will only be allowed if the key doesn't exist.
+            If the index is non-zero the write will only be allowed if the key's current version
+            matches the version specified in the cas parameter. Only valid for KV engine version 2.
+        :type cas: int
+        :rtype: requests.Response
+        :return: The response of the create_or_update_secret request.
+
+                 See https://hvac.readthedocs.io/en/stable/usage/secrets_engines/kv_v1.html
+                 and https://hvac.readthedocs.io/en/stable/usage/secrets_engines/kv_v2.html for details.
+
+        """
+        if self.kv_engine_version == 2 and method:
+            raise VaultError("The method parameter is only valid for version 1")
+        if self.kv_engine_version == 1 and cas:
+            raise VaultError("The cas parameter is only valid for version 2")
+        if self.kv_engine_version == 1:
+            response = self.client.secrets.kv.v1.create_or_update_secret(
+                secret_path=secret_path, secret=secret, mount_point=self.mount_point, method=method)
+        else:
+            response = self.client.secrets.kv.v2.create_or_update_secret(
+                secret_path=secret_path, secret=secret, mount_point=self.mount_point, cas=cas)
+        return response
+
+
+class VaultHook(BaseHook):
+    """
+    HashiCorp Vault wrapper to Interact with HashiCorp Vault KeyValue Secret engine.
+
+    HashiCorp HVac documentation:
+       * https://hvac.readthedocs.io/en/stable/
+
+    You connect to the host specified as host in the connection. The login/password from the connection
+    are used as credentials usually and you can specify different authentication parameters
+    via init params or via corresponding extras in the connection.
+
+    The extras in the connection are named the same as the parameters (`mount_point`,'kv_engine_version' ...).
+
+    Login/Password are used as credentials:
+
+        * approle: password -> secret_id
+        * ldap: login -> username,   password -> password
+        * userpass: login -> username, password -> password
+
+    :param vault_conn_id: The id of the connection to use
+    :type vault_conn_id: str
+    :param auth_type: Authentication Type for Vault. Default is ``token``. Available values are in
+        :py:const:`airflow.providers.hashicorp.hooks.vault.VALID_AUTH_TYPES`.
+    :type auth_type: str
+    :param mount_point: The "path" the secret engine was mounted on. Default is "secret". Note that
+         this mount_point is not used for authentication if authentication is done via a
+         different engine.
+    :type mount_point: str
+    :param kv_engine_version: Select the version of the engine to run (``1`` or ``2``). Defaults to
+          version defined in connection or ``2`` if not defined in connection.
+    :type kv_engine_version: int
+    :param token: Authentication token to include in requests sent to Vault.
+        (for ``token`` and ``github`` auth_type)
+    :type token: str
+    :param role_id: Role ID for Authentication (for ``approle`` auth_type)
+    :type role_id: str
+    :param kubernetes_role: Role for Authentication (for ``kubernetes`` auth_type)
+    :type kubernetes_role: str
+    :param kubernetes_jwt_path: Path for kubernetes jwt token (for ``kubernetes`` auth_type, default:
+        ``/var/run/secrets/kubernetes.io/serviceaccount/token``)
+    :type kubernetes_jwt_path: str
+    :param gcp_key_path: Path to GCP Credential JSON file (for ``gcp`` auth_type)
+    :type gcp_key_path: str
+    :param gcp_scopes: Comma-separated string containing GCP scopes (for ``gcp`` auth_type)
+    :type gcp_scopes: str
+
+    """
+    def __init__(  # pylint: disable=too-many-arguments
+        self,
+        vault_conn_id: str,
+        auth_type: Optional[str] = None,
+        mount_point: Optional[str] = None,
+        kv_engine_version: Optional[int] = None,
+        token: Optional[str] = None,
+        role_id: Optional[str] = None,
+        kubernetes_role: Optional[str] = None,
+        kubernetes_jwt_path: Optional[str] = None,
+        gcp_key_path: Optional[str] = None,
+        gcp_scopes: Optional[str] = None,
+    ):
+        super().__init__()
+        self.connection = self.get_connection(vault_conn_id)
+
+        if not auth_type:
+            auth_type = self.connection.extra_dejson.get('auth_type') or "token"
+
+        if not mount_point:
+            mount_point = self.connection.extra_dejson.get('mount_point')
+        if not mount_point:
+            mount_point = 'secret'
+
+        if not kv_engine_version:
+            conn_version = self.connection.extra_dejson.get("kv_engine_version")
+            try:
+                kv_engine_version = int(conn_version) if conn_version else DEFAULT_KV_ENGINE_VERSION
+            except ValueError:
+                raise VaultError(f"The version is not an int: {conn_version}. ")
+
+        if auth_type in ["approle"]:
+            if not role_id:
+                role_id = self.connection.extra_dejson.get('role_id')
+
+        if auth_type in ['github', "token"]:
+            if not token:
+                token = self.connection.extra_dejson.get('token')
+        gcp_key_path, gcp_scopes = \
+            self._get_gcp_parameters_from_connection(gcp_key_path, gcp_scopes) \

Review comment:
       Why do we pass `gcp_key_path, gcp_scopes` in to this function (same for kube below) -- aren't they guaranteed to only ever by None as they are local variables that are assigned a value based on the return




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