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Diffstat (limited to 'java/com/google/security/wycheproof/testcases/CipherOutputStreamTest.java')
-rw-r--r-- | java/com/google/security/wycheproof/testcases/CipherOutputStreamTest.java | 239 |
1 files changed, 239 insertions, 0 deletions
diff --git a/java/com/google/security/wycheproof/testcases/CipherOutputStreamTest.java b/java/com/google/security/wycheproof/testcases/CipherOutputStreamTest.java new file mode 100644 index 0000000..e4f288a --- /dev/null +++ b/java/com/google/security/wycheproof/testcases/CipherOutputStreamTest.java @@ -0,0 +1,239 @@ +/** + * @license + * Copyright 2016 Google Inc. All rights reserved. + * 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 com.google.security.wycheproof; + +import java.io.ByteArrayOutputStream; +import java.io.IOException; +import java.security.NoSuchAlgorithmException; +import java.security.SecureRandom; +import java.security.spec.AlgorithmParameterSpec; +import java.util.ArrayList; +import java.util.Arrays; +import javax.crypto.Cipher; +import javax.crypto.CipherOutputStream; +import javax.crypto.spec.GCMParameterSpec; +import javax.crypto.spec.SecretKeySpec; +import junit.framework.TestCase; + +/** CipherOutputStream tests */ +public class CipherOutputStreamTest extends TestCase { + static final SecureRandom rand = new SecureRandom(); + + static byte[] randomBytes(int size) { + byte[] bytes = new byte[size]; + rand.nextBytes(bytes); + return bytes; + } + + static SecretKeySpec randomKey(String algorithm, int keySizeInBytes) { + return new SecretKeySpec(randomBytes(keySizeInBytes), "AES"); + } + + static AlgorithmParameterSpec randomParameters( + String algorithm, int ivSizeInBytes, int tagSizeInBytes) { + if ("AES/GCM/NoPadding".equals(algorithm) || "AES/EAX/NoPadding".equals(algorithm)) { + return new GCMParameterSpec(8 * tagSizeInBytes, randomBytes(ivSizeInBytes)); + } + return null; + } + + /** Test vectors */ + @SuppressWarnings("InsecureCryptoUsage") + public static class TestVector { + public String algorithm; + public SecretKeySpec key; + public AlgorithmParameterSpec params; + public byte[] pt; + public byte[] aad; + public byte[] ct; + + public TestVector( + String algorithm, int keySize, int ivSize, int tagSize, int ptSize, int aadSize) + throws Exception { + this.algorithm = algorithm; + this.key = randomKey(algorithm, keySize); + this.params = randomParameters(algorithm, ivSize, tagSize); + this.pt = randomBytes(ptSize); + this.aad = randomBytes(aadSize); + Cipher cipher = Cipher.getInstance(algorithm); + cipher.init(Cipher.ENCRYPT_MODE, this.key, this.params); + cipher.updateAAD(aad); + this.ct = cipher.doFinal(pt); + } + } + + Iterable<TestVector> getTestVectors( + String algorithm, + int[] keySizes, + int[] ivSizes, + int[] tagSizes, + int[] ptSizes, + int[] aadSizes) + throws Exception { + ArrayList<TestVector> result = new ArrayList<TestVector>(); + for (int keySize : keySizes) { + for (int ivSize : ivSizes) { + for (int tagSize : tagSizes) { + for (int ptSize : ptSizes) { + for (int aadSize : aadSizes) { + result.add(new TestVector(algorithm, keySize, ivSize, tagSize, ptSize, aadSize)); + } + } + } + } + } + return result; + } + + @SuppressWarnings("InsecureCryptoUsage") + public void testEncrypt(Iterable<TestVector> tests) throws Exception { + for (TestVector t : tests) { + Cipher cipher = Cipher.getInstance(t.algorithm); + cipher.init(Cipher.ENCRYPT_MODE, t.key, t.params); + cipher.updateAAD(t.aad); + ByteArrayOutputStream os = new ByteArrayOutputStream(); + CipherOutputStream cos = new CipherOutputStream(os, cipher); + cos.write(t.pt); + cos.close(); + assertEquals(TestUtil.bytesToHex(t.ct), TestUtil.bytesToHex(os.toByteArray())); + } + } + + @SuppressWarnings("InsecureCryptoUsage") + public void testDecrypt(Iterable<TestVector> tests) throws Exception { + for (TestVector t : tests) { + Cipher cipher = Cipher.getInstance(t.algorithm); + cipher.init(Cipher.DECRYPT_MODE, t.key, t.params); + cipher.updateAAD(t.aad); + ByteArrayOutputStream os = new ByteArrayOutputStream(); + CipherOutputStream cos = new CipherOutputStream(os, cipher); + cos.write(t.ct); + cos.close(); + assertEquals(TestUtil.bytesToHex(t.pt), TestUtil.bytesToHex(os.toByteArray())); + } + } + + @SuppressWarnings("InsecureCryptoUsage") + public void testCorruptDecrypt(Iterable<TestVector> tests) throws Exception { + for (TestVector t : tests) { + Cipher cipher = Cipher.getInstance(t.algorithm); + cipher.init(Cipher.DECRYPT_MODE, t.key, t.params); + cipher.updateAAD(t.aad); + byte[] ct = Arrays.copyOf(t.ct, t.ct.length); + ct[ct.length - 1] ^= (byte) 1; + ByteArrayOutputStream os = new ByteArrayOutputStream(); + CipherOutputStream cos = new CipherOutputStream(os, cipher); + cos.write(ct); + try { + // cos.close() should call cipher.doFinal(). + cos.close(); + byte[] decrypted = os.toByteArray(); + // Unfortunately Oracle thinks that returning an empty array is valid behaviour. + // We accept empty results here, but flag them in the next test, so that we can distinguish + // between beheviour considered acceptable by Oracle and more serious flaws. + if (decrypted.length > 0) { + fail( + "this should fail; decrypted:" + + TestUtil.bytesToHex(decrypted) + + " pt: " + + TestUtil.bytesToHex(t.pt)); + } + } catch (IOException ex) { + // expected + } + } + } + + @SuppressWarnings("InsecureCryptoUsage") + public void testCorruptDecryptEmpty(Iterable<TestVector> tests) throws Exception { + for (TestVector t : tests) { + Cipher cipher = Cipher.getInstance(t.algorithm); + cipher.init(Cipher.DECRYPT_MODE, t.key, t.params); + cipher.updateAAD(t.aad); + byte[] ct = Arrays.copyOf(t.ct, t.ct.length); + ct[ct.length - 1] ^= (byte) 1; + ByteArrayOutputStream os = new ByteArrayOutputStream(); + CipherOutputStream cos = new CipherOutputStream(os, cipher); + cos.write(ct); + try { + // cos.close() should call cipher.doFinal(). + cos.close(); + byte[] decrypted = os.toByteArray(); + fail( + "this should fail; decrypted:" + + TestUtil.bytesToHex(decrypted) + + " pt: " + + TestUtil.bytesToHex(t.pt)); + } catch (IOException ex) { + // expected + } + } + } + + public void testAesGcm() throws Exception { + final int[] keySizes = {16, 32}; + final int[] ivSizes = {12}; + final int[] tagSizes = {12, 16}; + final int[] ptSizes = {8, 16, 65, 8100}; + final int[] aadSizes = {0, 8, 24}; + Iterable<TestVector> v = + getTestVectors("AES/GCM/NoPadding", keySizes, ivSizes, tagSizes, ptSizes, aadSizes); + testEncrypt(v); + testDecrypt(v); + testCorruptDecrypt(v); + } + + /** + * Unfortunately Oracle thinks that returning an empty array is valid behaviour for corrupt + * ciphertexts. Because of this we test empty plaintext separately to distinguish behaviour + * considered acceptable by Oracle from other behaviour. + */ + public void testEmptyPlaintext() throws Exception { + final int[] keySizes = {16, 32}; + final int[] ivSizes = {12}; + final int[] tagSizes = {12, 16}; + final int[] ptSizes = {0}; + final int[] aadSizes = {0, 8, 24}; + Iterable<TestVector> v = + getTestVectors("AES/GCM/NoPadding", keySizes, ivSizes, tagSizes, ptSizes, aadSizes); + testEncrypt(v); + testDecrypt(v); + testCorruptDecryptEmpty(v); + } + + /** Tests CipherOutputStream with AES-EAX if AES-EAS is supported by the provider. */ + @SuppressWarnings("InsecureCryptoUsage") + public void testAesEax() throws Exception { + final String algorithm = "AES/EAX/NoPadding"; + final int[] keySizes = {16, 32}; + final int[] ivSizes = {12, 16}; + final int[] tagSizes = {12, 16}; + final int[] ptSizes = {8, 16, 65, 8100}; + final int[] aadSizes = {0, 8, 24}; + try { + Cipher.getInstance(algorithm); + } catch (NoSuchAlgorithmException ex) { + System.out.println("Skipping testAesEax"); + return; + } + Iterable<TestVector> v = + getTestVectors(algorithm, keySizes, ivSizes, tagSizes, ptSizes, aadSizes); + testEncrypt(v); + testDecrypt(v); + testCorruptDecrypt(v); + } +} |