| /* |
| * Copyright (c) 1998, 2012, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package com.sun.crypto.provider; |
| |
| import java.io.*; |
| import java.math.BigInteger; |
| import java.security.AlgorithmParametersSpi; |
| import java.security.spec.AlgorithmParameterSpec; |
| import java.security.spec.InvalidParameterSpecException; |
| import javax.crypto.spec.PBEParameterSpec; |
| import sun.security.util.HexDumpEncoder; |
| import sun.security.util.*; |
| |
| |
| /** |
| * This class implements the parameter set used with password-based |
| * encryption, which is defined in PKCS#5 as follows: |
| * |
| * <pre> |
| * PBEParameter ::= SEQUENCE { |
| * salt OCTET STRING SIZE(8), |
| * iterationCount INTEGER } |
| * </pre> |
| * |
| * @author Jan Luehe |
| * |
| */ |
| |
| public final class PBEParameters extends AlgorithmParametersSpi { |
| |
| // the salt |
| private byte[] salt = null; |
| |
| // the iteration count |
| private int iCount = 0; |
| |
| // the cipher parameter |
| private AlgorithmParameterSpec cipherParam = null; |
| |
| protected void engineInit(AlgorithmParameterSpec paramSpec) |
| throws InvalidParameterSpecException |
| { |
| if (!(paramSpec instanceof PBEParameterSpec)) { |
| throw new InvalidParameterSpecException |
| ("Inappropriate parameter specification"); |
| } |
| this.salt = ((PBEParameterSpec)paramSpec).getSalt().clone(); |
| this.iCount = ((PBEParameterSpec)paramSpec).getIterationCount(); |
| this.cipherParam = ((PBEParameterSpec)paramSpec).getParameterSpec(); |
| } |
| |
| protected void engineInit(byte[] encoded) |
| throws IOException |
| { |
| try { |
| DerValue val = new DerValue(encoded); |
| if (val.tag != DerValue.tag_Sequence) { |
| throw new IOException("PBE parameter parsing error: " |
| + "not a sequence"); |
| } |
| val.data.reset(); |
| |
| this.salt = val.data.getOctetString(); |
| this.iCount = val.data.getInteger(); |
| |
| if (val.data.available() != 0) { |
| throw new IOException |
| ("PBE parameter parsing error: extra data"); |
| } |
| } catch (NumberFormatException e) { |
| throw new IOException("iteration count too big"); |
| } |
| } |
| |
| protected void engineInit(byte[] encoded, String decodingMethod) |
| throws IOException |
| { |
| engineInit(encoded); |
| } |
| |
| protected <T extends AlgorithmParameterSpec> |
| T engineGetParameterSpec(Class<T> paramSpec) |
| throws InvalidParameterSpecException |
| { |
| if (PBEParameterSpec.class.isAssignableFrom(paramSpec)) { |
| return paramSpec.cast( |
| new PBEParameterSpec(this.salt, this.iCount, this.cipherParam)); |
| } else { |
| throw new InvalidParameterSpecException |
| ("Inappropriate parameter specification"); |
| } |
| } |
| |
| protected byte[] engineGetEncoded() throws IOException { |
| DerOutputStream out = new DerOutputStream(); |
| DerOutputStream bytes = new DerOutputStream(); |
| |
| bytes.putOctetString(this.salt); |
| bytes.putInteger(this.iCount); |
| |
| out.write(DerValue.tag_Sequence, bytes); |
| return out.toByteArray(); |
| } |
| |
| protected byte[] engineGetEncoded(String encodingMethod) |
| throws IOException |
| { |
| return engineGetEncoded(); |
| } |
| |
| /* |
| * Returns a formatted string describing the parameters. |
| */ |
| protected String engineToString() { |
| String LINE_SEP = System.getProperty("line.separator"); |
| String saltString = LINE_SEP + " salt:" + LINE_SEP + "["; |
| HexDumpEncoder encoder = new HexDumpEncoder(); |
| saltString += encoder.encodeBuffer(salt); |
| saltString += "]"; |
| |
| return saltString + LINE_SEP + " iterationCount:" |
| + LINE_SEP + Debug.toHexString(BigInteger.valueOf(iCount)) |
| + LINE_SEP; |
| } |
| } |