| /* |
| * Copyright (C) 2008 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 org.apache.harmony.xnet.provider.jsse; |
| |
| import org.bouncycastle.crypto.ExtendedDigest; |
| |
| import java.security.NoSuchAlgorithmException; |
| |
| /** |
| * Implements the BouncyCastle Digest interface using OpenSSL's EVP API. |
| */ |
| public class OpenSSLMessageDigest implements ExtendedDigest { |
| |
| /** |
| * Holds the name of the hashing algorithm, e.g. "SHA-1"; |
| */ |
| private String algorithm; |
| |
| /** |
| * Holds a pointer to the native message digest context. |
| */ |
| private int ctx; |
| |
| /** |
| * Holds a dummy buffer for writing single bytes to the digest. |
| */ |
| private byte[] singleByte = new byte[1]; |
| |
| /** |
| * Creates a new OpenSSLMessageDigest instance for the given algorithm |
| * name. |
| * |
| * @param algorithm The name of the algorithm, e.g. "SHA1". |
| * |
| * @return The new OpenSSLMessageDigest instance. |
| * |
| * @throws RuntimeException In case of problems. |
| */ |
| public static OpenSSLMessageDigest getInstance(String algorithm) { |
| return new OpenSSLMessageDigest(algorithm); |
| } |
| |
| /** |
| * Creates a new OpenSSLMessageDigest instance for the given algorithm |
| * name. |
| * |
| * @param algorithm The name of the algorithm, e.g. "SHA1". |
| */ |
| private OpenSSLMessageDigest(String algorithm) { |
| this.algorithm = algorithm; |
| |
| // We don't support MD2 anymore. This needs to also check for aliases |
| // and OIDs. |
| if ("MD2".equalsIgnoreCase(algorithm) || "1.2.840.113549.2.2" |
| .equals(algorithm)) { |
| throw new RuntimeException(algorithm + " not supported"); |
| } |
| |
| ctx = NativeCrypto.EVP_new(); |
| try { |
| NativeCrypto.EVP_DigestInit(ctx, algorithm.replace("-", "").toLowerCase()); |
| } catch (Exception ex) { |
| throw new RuntimeException(ex.getMessage() + " (" + algorithm + ")"); |
| } |
| } |
| |
| public int doFinal(byte[] out, int outOff) { |
| int i = NativeCrypto.EVP_DigestFinal(ctx, out, outOff); |
| reset(); |
| return i; |
| } |
| |
| public String getAlgorithmName() { |
| return algorithm; |
| } |
| |
| public int getDigestSize() { |
| return NativeCrypto.EVP_DigestSize(ctx); |
| } |
| |
| public int getByteLength() { |
| return NativeCrypto.EVP_DigestBlockSize(ctx); |
| } |
| |
| public void reset() { |
| NativeCrypto.EVP_DigestInit(ctx, algorithm.replace("-", "").toLowerCase()); |
| } |
| |
| public void update(byte in) { |
| singleByte[0] = in; |
| NativeCrypto.EVP_DigestUpdate(ctx, singleByte, 0, 1); |
| } |
| |
| public void update(byte[] in, int inOff, int len) { |
| NativeCrypto.EVP_DigestUpdate(ctx, in, inOff, len); |
| } |
| |
| @Override |
| protected void finalize() throws Throwable { |
| super.finalize(); |
| NativeCrypto.EVP_free(ctx); |
| } |
| |
| } |