| /* |
| * Copyright (C) 2017 The Android Open Source Project |
| * |
| * 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 libcore.javax.crypto.spec; |
| |
| import java.security.AlgorithmParameters; |
| import java.security.NoSuchAlgorithmException; |
| import java.security.Provider; |
| import java.security.Security; |
| import java.util.Arrays; |
| import java.util.Base64; |
| import javax.crypto.spec.GCMParameterSpec; |
| |
| import tests.security.AlgorithmParameterSymmetricHelper; |
| import tests.security.AlgorithmParametersTest; |
| |
| public class AlgorithmParametersTestGCM extends AlgorithmParametersTest { |
| |
| private static final byte[] IV = new byte[] { |
| (byte) 0x04, (byte) 0x08, (byte) 0x68, (byte) 0xC8, |
| (byte) 0xFF, (byte) 0x64, (byte) 0x72, (byte) 0xF5, |
| (byte) 0x04, (byte) 0x08, (byte) 0x68, (byte) 0xC8 }; |
| |
| private static final int TLEN = 96; |
| |
| // The ASN.1 encoding for GCM params (specified in RFC 5084 section 3.2) specifies |
| // a default value of 12 for TLEN, so both values with and without TLEN should work. |
| // See README.ASN1 for how to understand and reproduce this data. |
| |
| // asn1=SEQUENCE:gcm |
| // [gcm] |
| // iv=FORMAT:HEX,OCTETSTRING:040868C8FF6472F5040868C8 |
| private static final String ENCODED_DATA_NO_TLEN = "MA4EDAQIaMj/ZHL1BAhoyA=="; |
| |
| // asn1=SEQUENCE:gcm |
| // [gcm] |
| // iv=FORMAT:HEX,OCTETSTRING:040868C8FF6472F5040868C8 |
| // tlen=INT:12 |
| private static final String ENCODED_DATA_TLEN = "MBEEDAQIaMj/ZHL1BAhoyAIBDA=="; |
| |
| public AlgorithmParametersTestGCM() { |
| super("GCM", new AlgorithmParameterSymmetricHelper("AES", "GCM/NOPADDING", 128), new GCMParameterSpec(TLEN, IV)); |
| } |
| |
| public void testEncoding() throws Exception { |
| for (Provider p : Security.getProviders()) { |
| AlgorithmParameters params; |
| try { |
| params = AlgorithmParameters.getInstance("GCM", p); |
| } catch (NoSuchAlgorithmException e) { |
| // This provider doesn't support AES/GCM, ignore |
| continue; |
| } |
| |
| params.init(new GCMParameterSpec(TLEN, IV)); |
| String encoded = Base64.getEncoder().encodeToString(params.getEncoded()); |
| assertTrue("Provider: " + p.getName() + ", encoded: " + encoded, |
| encoded.equals(ENCODED_DATA_TLEN) || encoded.equals(ENCODED_DATA_NO_TLEN)); |
| |
| params = AlgorithmParameters.getInstance("GCM", p); |
| params.init(Base64.getDecoder().decode(ENCODED_DATA_NO_TLEN)); |
| GCMParameterSpec spec = params.getParameterSpec(GCMParameterSpec.class); |
| assertEquals("Provider: " + p.getName(), TLEN, spec.getTLen()); |
| assertTrue("Provider: " + p.getName(), Arrays.equals(IV, spec.getIV())); |
| |
| params = AlgorithmParameters.getInstance("GCM", p); |
| params.init(Base64.getDecoder().decode(ENCODED_DATA_TLEN)); |
| spec = params.getParameterSpec(GCMParameterSpec.class); |
| assertEquals("Provider: " + p.getName(), TLEN, spec.getTLen()); |
| assertTrue("Provider: " + p.getName(), Arrays.equals(IV, spec.getIV())); |
| } |
| } |
| |
| } |