1 /* 2 * Copyright (C) 2008 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package org.bouncycastle.crypto.digests; 18 19 import org.bouncycastle.crypto.ExtendedDigest; 20 import org.bouncycastle.jcajce.provider.keystore.bc.BcKeyStoreSpi; 21 import java.security.DigestException; 22 import java.security.MessageDigest; 23 24 /** 25 * Implements the BouncyCastle Digest interface using OpenSSL's EVP API. This 26 * must be an ExtendedDigest for {@link BcKeyStoreSpi} to be able to use it. 27 */ 28 public class OpenSSLDigest implements ExtendedDigest { 29 private final MessageDigest delegate; 30 31 private final int byteSize; 32 OpenSSLDigest(String algorithm, int byteSize)33 public OpenSSLDigest(String algorithm, int byteSize) { 34 try { 35 delegate = MessageDigest.getInstance(algorithm, "AndroidOpenSSL"); 36 this.byteSize = byteSize; 37 } catch (Exception e) { 38 throw new RuntimeException(e); 39 } 40 } 41 getAlgorithmName()42 public String getAlgorithmName() { 43 return delegate.getAlgorithm(); 44 } 45 getDigestSize()46 public int getDigestSize() { 47 return delegate.getDigestLength(); 48 } 49 getByteLength()50 public int getByteLength() { 51 return byteSize; 52 } 53 reset()54 public void reset() { 55 delegate.reset(); 56 } 57 update(byte in)58 public void update(byte in) { 59 delegate.update(in); 60 } 61 update(byte[] in, int inOff, int len)62 public void update(byte[] in, int inOff, int len) { 63 delegate.update(in, inOff, len); 64 } 65 doFinal(byte[] out, int outOff)66 public int doFinal(byte[] out, int outOff) { 67 try { 68 return delegate.digest(out, outOff, out.length - outOff); 69 } catch (DigestException e) { 70 throw new RuntimeException(e); 71 } 72 } 73 74 public static class MD5 extends OpenSSLDigest { MD5()75 public MD5() { super("MD5", 64); } 76 } 77 78 public static class SHA1 extends OpenSSLDigest { SHA1()79 public SHA1() { super("SHA-1", 64); } 80 } 81 82 public static class SHA224 extends OpenSSLDigest { SHA224()83 public SHA224() { super("SHA-224", 64); } 84 } 85 86 public static class SHA256 extends OpenSSLDigest { SHA256()87 public SHA256() { super("SHA-256", 64); } 88 } 89 90 public static class SHA384 extends OpenSSLDigest { SHA384()91 public SHA384() { super("SHA-384", 128); } 92 } 93 94 public static class SHA512 extends OpenSSLDigest { SHA512()95 public SHA512() { super("SHA-512", 128); } 96 } 97 } 98