AesBytesEncryptorTests

Issue: gh-5099

crypto/src/test/java/org/springframework/security/crypto/encrypt/AesBytesEncryptorTests.java

@@ -0,0 +1,77 @@
+/*
+ * Copyright 2002-2018 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.security.crypto.encrypt;
+
+import org.junit.Before;
+import org.junit.Test;
+
+import org.springframework.security.crypto.codec.Hex;
+import org.springframework.security.crypto.keygen.BytesKeyGenerator;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
+import static org.springframework.security.crypto.encrypt.AesBytesEncryptor.CipherAlgorithm.GCM;
+
+/**
+ * Tests for {@link AesBytesEncryptor}
+ */
+public class AesBytesEncryptorTests {
+	private String secret = "value";
+	private String password = "password";
+	private String hexSalt = "deadbeef";
+
+	private BytesKeyGenerator generator;
+
+	@Before
+	public void setUp() {
+		this.generator = mock(BytesKeyGenerator.class);
+		when(this.generator.generateKey()).thenReturn(Hex.decode("4b0febebd439db7ca77153cb254520c3"));
+		when(this.generator.getKeyLength()).thenReturn(16);
+	}
+
+	@Test
+	public void roundtripWhenUsingDefaultsThenEncryptsAndDecrypts() {
+		AesBytesEncryptor encryptor = new AesBytesEncryptor(this.password, this.hexSalt);
+		byte[] encryption = encryptor.encrypt(this.secret.getBytes());
+		byte[] decryption = encryptor.decrypt(encryption);
+		assertThat(new String(decryption)).isEqualTo(this.secret);
+	}
+
+	@Test
+	public void roundtripWhenUsingDefaultCipherThenEncryptsAndDecrypts() {
+		AesBytesEncryptor encryptor = new AesBytesEncryptor(this.password, this.hexSalt, this.generator);
+		byte[] encryption = encryptor.encrypt(this.secret.getBytes());
+		assertThat(new String(Hex.encode(encryption)))
+				.isEqualTo("4b0febebd439db7ca77153cb254520c3b7232ac29355d07869433f1ecf55fe94");
+
+		byte[] decryption = encryptor.decrypt(encryption);
+		assertThat(new String(decryption)).isEqualTo(this.secret);
+	}
+
+	@Test
+	public void roundtripWhenUsingGcmThenEncryptsAndDecrypts() {
+		AesBytesEncryptor encryptor = new AesBytesEncryptor(this.password, this.hexSalt, this.generator, GCM);
+		byte[] encryption = encryptor.encrypt(this.secret.getBytes());
+		assertThat(new String(Hex.encode(encryption)))
+				.isEqualTo("4b0febebd439db7ca77153cb254520c3e4d61ae38207b4e42b820d311dc3d4e0e2f37ed5ee");
+
+		byte[] decryption = encryptor.decrypt(encryption);
+		assertThat(new String(decryption)).isEqualTo(this.secret);
+	}
+
+}