[GitHub] [cassandra] maulin-vasavada commented on a change in pull request #1316: CASSANDRA-17031: Add support for PEM formatted key material for the SSL context

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

maulin-vasavada commented on a change in pull request #1316:
URL: https://github.com/apache/cassandra/pull/1316#discussion_r798939150



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File path: src/java/org/apache/cassandra/security/PEMReader.java
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@@ -0,0 +1,282 @@
+/*
+ * 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.
+ */
+
+package org.apache.cassandra.security;
+
+import java.io.ByteArrayInputStream;
+import java.io.IOException;
+import java.security.AlgorithmParameters;
+import java.security.GeneralSecurityException;
+import java.security.Key;
+import java.security.KeyFactory;
+import java.security.PrivateKey;
+import java.security.cert.Certificate;
+import java.security.cert.CertificateFactory;
+import java.security.cert.X509Certificate;
+import java.security.spec.PKCS8EncodedKeySpec;
+import java.util.ArrayList;
+import java.util.Base64;
+import java.util.List;
+import java.util.Set;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+import javax.crypto.BadPaddingException;
+import javax.crypto.Cipher;
+import javax.crypto.EncryptedPrivateKeyInfo;
+import javax.crypto.SecretKeyFactory;
+import javax.crypto.spec.PBEKeySpec;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import static java.util.regex.Pattern.CASE_INSENSITIVE;
+
+/**
+ * This is a helper class to read private keys and X509 certifificates encoded based on <a href="https://datatracker.ietf.org/doc/html/rfc1421">PEM (RFC 1421)</a>
+ * format. It can read Password Based Encrypted (PBE henceforth) private keys as well as non-encrypted private keys
+ * along with the X509 certificates/cert-chain based on the textual encoding defined in the <a href="https://datatracker.ietf.org/doc/html/rfc7468">RFC 7468</a>
+ * <p>
+ * The input private key must be in PKCS#8 format.
+ * <p>
+ * It returns PKCS#8 formatted private key and X509 certificates.
+ */
+public final class PEMReader
+{
+    /**
+     * The private key can be with any of these algorithms in order for this read to successfully parse it.
+     * Currently supported algorithms are,
+     * <pre>
+     *     RSA, DSA or EC
+     * </pre>
+     * The first one to be evaluated is RSA, being the most common for private keys.
+     */
+    public static final Set<String> SUPPORTED_PRIVATE_KEY_ALGORITHMS = Set.of("RSA", "DSA", "EC");

Review comment:
       Sorry about forgetting that and thanks for making the change for for Java 8 compatible code on your separate branch.




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