[GitHub] [trafficcontrol] mattjackson220 commented on a change in pull request #5843: Updated TV Postgres to use AES encryption for URL Sig Keys

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

mattjackson220 commented on a change in pull request #5843:
URL: https://github.com/apache/trafficcontrol/pull/5843#discussion_r631959019



##########
File path: traffic_ops/traffic_ops_golang/trafficvault/backends/postgres/encrypt.go
##########
@@ -0,0 +1,92 @@
+package postgres
+
+/*
+ * 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.
+ */
+
+import (
+	"crypto/aes"
+	"crypto/cipher"
+	"crypto/rand"
+	"errors"
+	"io"
+	"io/ioutil"
+)
+
+func encryptString(stringToEncrypt string, encryptionKeyLocation string) (string, error) {
+	key, err := readKeyFromFile(encryptionKeyLocation)
+	if err != nil {
+		return "", err
+	}
+
+	cipherBlock, err := aes.NewCipher(key)
+	if err != nil {
+		return "", err
+	}
+
+	gcm, err := cipher.NewGCM(cipherBlock)
+	if err != nil {
+		return "", err
+	}
+
+	nonce := make([]byte, gcm.NonceSize())
+	if _, err = io.ReadFull(rand.Reader, nonce); err != nil {
+		return "", err
+	}
+
+	return string(gcm.Seal(nonce, nonce, []byte(stringToEncrypt), nil)), nil

Review comment:
       yea just to prepend it there since we dont want to save it elsewhere




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