Adds additional test for encyptor with RSA private key (#315)

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

@@ -0,0 +1,47 @@
+/*
+ * Copyright 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.
+ * 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.springframework.cloud.bootstrap.encrypt;
+
+import org.junit.Test;
+import org.springframework.cloud.context.encrypt.EncryptorFactory;
+import org.springframework.core.io.ClassPathResource;
+import org.springframework.security.crypto.encrypt.TextEncryptor;
+import org.springframework.util.StreamUtils;
+
+import java.nio.charset.Charset;
+
+import static org.junit.Assert.assertEquals;
+
+/**
+ * @author Biju Kunjummen
+ */
+public class EncryptorFactoryTests {
+
+	@Test
+	public void testWithRsaPrivateKey() throws Exception {
+		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);
+		String toEncrypt = "sample text to encrypt";
+		String encrypted = encryptor.encrypt(toEncrypt);
+
+		assertEquals(toEncrypt, encryptor.decrypt(encrypted));
+	}
+}