Allows more standard rsa private key for config values encryption (#323)

spring-cloud-context/src/main/java/org/springframework/cloud/context/encrypt/EncryptorFactory.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2014 the original author or authors.
+ * Copyright 2013-2018 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -15,13 +15,23 @@
  */
 package org.springframework.cloud.context.encrypt;
 
+import org.bouncycastle.asn1.pkcs.PrivateKeyInfo;
+import org.bouncycastle.openssl.MiscPEMGenerator;
+import org.bouncycastle.openssl.PEMKeyPair;
+import org.bouncycastle.openssl.PEMParser;
+import org.bouncycastle.util.io.pem.PemObjectGenerator;
+import org.bouncycastle.util.io.pem.PemWriter;
 import org.springframework.security.crypto.encrypt.Encryptors;
 import org.springframework.security.crypto.encrypt.TextEncryptor;
 import org.springframework.security.rsa.crypto.RsaSecretEncryptor;
 
+import java.io.IOException;
+import java.io.StringReader;
+import java.io.StringWriter;
+
 /**
  * @author Dave Syer
- *
+ * @author Biju Kunjummen
  */
 public class EncryptorFactory {
 
@@ -34,7 +44,8 @@ public class EncryptorFactory {
 		if (data.contains("RSA PRIVATE KEY")) {
 
 			try {
-				encryptor = new RsaSecretEncryptor(data);
+				String normalizedPemData = normalizePem(data);
+				encryptor = new RsaSecretEncryptor(normalizedPemData.replaceAll("\\n", "").replaceAll("\\r", ""));
 			}
 			catch (IllegalArgumentException e) {
 				throw new KeyFormatException(e);
@@ -51,6 +62,26 @@ public class EncryptorFactory {
 		return encryptor;
 	}
 
+	private String normalizePem(String data) {
+		PEMParser pemParser = new PEMParser(new StringReader(data));
+		PEMKeyPair pemKeyPair = null;
+		try {
+			pemKeyPair = (PEMKeyPair) pemParser.readObject();
+			PrivateKeyInfo privateKeyInfo = pemKeyPair.getPrivateKeyInfo();
+
+			StringWriter textWriter = new StringWriter();
+			PemWriter pemWriter = new PemWriter(textWriter);
+			PemObjectGenerator pemObjectGenerator = new MiscPEMGenerator(privateKeyInfo);
+
+			pemWriter.writeObject(pemObjectGenerator);
+			pemWriter.flush();
+			return textWriter.toString();
+		}
+		catch (IOException e) {
+			throw new RuntimeException(e.getMessage(), e);
+		}
+	}
+
 }
 
 

spring-cloud-context/src/test/java/org/springframework/cloud/bootstrap/encrypt/EncryptorFactoryTests.java

@@ -35,13 +35,18 @@ public class EncryptorFactoryTests {
 		String key = StreamUtils.copyToString(
 				new ClassPathResource("/example-test-rsa-private-key").getInputStream(),
 				Charset.forName("ASCII"));
-		//RSA private key needs to be with no new lines 
-		//-----BEGIN RSA PRIVATE KEY-----MIIEowI....iX8htsO-----END RSA PRIVATE KEY-----
-		String keyNoNewLines = key.replaceAll("\\n", "");
-		TextEncryptor encryptor = new EncryptorFactory().create(keyNoNewLines);
+
+		TextEncryptor encryptor = new EncryptorFactory().create(key);
 		String toEncrypt = "sample text to encrypt";
 		String encrypted = encryptor.encrypt(toEncrypt);
 
 		assertEquals(toEncrypt, encryptor.decrypt(encrypted));
 	}
+
+	@Test(expected = RuntimeException.class)
+	public void testWithInvalidRsaPrivateKey() {
+		String key = "-----BEGIN RSA PRIVATE KEY-----\n"
+				+ "MIIEowIBAAKCAQEAwClFgrRa/PUHPIJr9gvIPL6g6Rjp/TVZmVNOf2fL96DYbkj5\n";
+		new EncryptorFactory().create(key);
+	}
 }

spring-cloud-context/src/test/resources/example-test-rsa-private-key

@@ -1,8 +1,6 @@
 -----BEGIN RSA PRIVATE KEY-----
 MIIEowIBAAKCAQEAwClFgrRa/PUHPIJr9gvIPL6g6Rjp/TVZmVNOf2fL96DYbkj5
-4YbrwfKwjoTjk1M6gLQpOA4Blocx6zN5OnICnVGlVM9xymWxTxxCfc2tE2Fai9I1
-wchULCChhwm/UU5ZNi3KpXinlyamSYw+lMQkZ8gTXCgOEvs2j9E1quF4pvy1BZKv
-bD8tUnUQlyiKRnI6gOxQL8B6OAYPRdaa9FVNmrs1B4eDPG918L2f1pT090P1n+tw
+4YbrwfKwjoTjk1M6gLQpOA4Blocx6zN5OnICnVGlVM9xymWxTxxCfc2tE2Fai9I1wchULCChhwm/UU5ZNi3KpXinlyamSYw+lMQkZ8gTXCgOEvs2j9E1quF4pvy1BZKvbD8tUnUQlyiKRnI6gOxQL8B6OAYPRdaa9FVNmrs1B4eDPG918L2f1pT090P1n+tw
 iejNgQvtSD78/A88qt89OhzscsufALTrBjycn89kkfBd0zbVLF0W6+ZVLZrf97/y
 LCoGSCcZL9LFPNvNqxOnleviDco7aOs4stQ9jQIDAQABAoIBAQC1TbthyN0YUe+T
         7dIDAbbZaVrU00biOtXgzjMADmTprP7Hf18UpIIIKfzfWw6FUD+gc1t4oe5pogE9