| /* |
| * Copyright (c) 2003, 2007, 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.IOException; |
| import java.security.AlgorithmParametersSpi; |
| import java.security.spec.AlgorithmParameterSpec; |
| import java.security.spec.InvalidParameterSpecException; |
| import javax.crypto.spec.RC2ParameterSpec; |
| import sun.misc.HexDumpEncoder; |
| import sun.security.util.*; |
| |
| /** |
| * This class implements the parameter set used with RC2 |
| * encryption, which is defined in RFC2268 as follows: |
| * |
| * <pre> |
| * RC2-CBCParameter ::= CHOICE { |
| * iv IV, |
| * params SEQUENCE { |
| * version RC2Version, |
| * iv IV |
| * } |
| * } |
| * |
| * where |
| * |
| * IV ::= OCTET STRING -- 8 octets |
| * RC2Version ::= INTEGER -- 1-1024 |
| * </pre> |
| * |
| * @author Sean Mullan |
| * @since 1.5 |
| */ |
| |
| public final class RC2Parameters extends AlgorithmParametersSpi { |
| |
| // TABLE[EKB] from section 6 of RFC 2268, used to convert effective key |
| // size to/from encoded version number |
| private final static int[] EKB_TABLE = new int[] { |
| 0xbd, 0x56, 0xea, 0xf2, 0xa2, 0xf1, 0xac, 0x2a, |
| 0xb0, 0x93, 0xd1, 0x9c, 0x1b, 0x33, 0xfd, 0xd0, |
| 0x30, 0x04, 0xb6, 0xdc, 0x7d, 0xdf, 0x32, 0x4b, |
| 0xf7, 0xcb, 0x45, 0x9b, 0x31, 0xbb, 0x21, 0x5a, |
| 0x41, 0x9f, 0xe1, 0xd9, 0x4a, 0x4d, 0x9e, 0xda, |
| 0xa0, 0x68, 0x2c, 0xc3, 0x27, 0x5f, 0x80, 0x36, |
| 0x3e, 0xee, 0xfb, 0x95, 0x1a, 0xfe, 0xce, 0xa8, |
| 0x34, 0xa9, 0x13, 0xf0, 0xa6, 0x3f, 0xd8, 0x0c, |
| 0x78, 0x24, 0xaf, 0x23, 0x52, 0xc1, 0x67, 0x17, |
| 0xf5, 0x66, 0x90, 0xe7, 0xe8, 0x07, 0xb8, 0x60, |
| 0x48, 0xe6, 0x1e, 0x53, 0xf3, 0x92, 0xa4, 0x72, |
| 0x8c, 0x08, 0x15, 0x6e, 0x86, 0x00, 0x84, 0xfa, |
| 0xf4, 0x7f, 0x8a, 0x42, 0x19, 0xf6, 0xdb, 0xcd, |
| 0x14, 0x8d, 0x50, 0x12, 0xba, 0x3c, 0x06, 0x4e, |
| 0xec, 0xb3, 0x35, 0x11, 0xa1, 0x88, 0x8e, 0x2b, |
| 0x94, 0x99, 0xb7, 0x71, 0x74, 0xd3, 0xe4, 0xbf, |
| 0x3a, 0xde, 0x96, 0x0e, 0xbc, 0x0a, 0xed, 0x77, |
| 0xfc, 0x37, 0x6b, 0x03, 0x79, 0x89, 0x62, 0xc6, |
| 0xd7, 0xc0, 0xd2, 0x7c, 0x6a, 0x8b, 0x22, 0xa3, |
| 0x5b, 0x05, 0x5d, 0x02, 0x75, 0xd5, 0x61, 0xe3, |
| 0x18, 0x8f, 0x55, 0x51, 0xad, 0x1f, 0x0b, 0x5e, |
| 0x85, 0xe5, 0xc2, 0x57, 0x63, 0xca, 0x3d, 0x6c, |
| 0xb4, 0xc5, 0xcc, 0x70, 0xb2, 0x91, 0x59, 0x0d, |
| 0x47, 0x20, 0xc8, 0x4f, 0x58, 0xe0, 0x01, 0xe2, |
| 0x16, 0x38, 0xc4, 0x6f, 0x3b, 0x0f, 0x65, 0x46, |
| 0xbe, 0x7e, 0x2d, 0x7b, 0x82, 0xf9, 0x40, 0xb5, |
| 0x1d, 0x73, 0xf8, 0xeb, 0x26, 0xc7, 0x87, 0x97, |
| 0x25, 0x54, 0xb1, 0x28, 0xaa, 0x98, 0x9d, 0xa5, |
| 0x64, 0x6d, 0x7a, 0xd4, 0x10, 0x81, 0x44, 0xef, |
| 0x49, 0xd6, 0xae, 0x2e, 0xdd, 0x76, 0x5c, 0x2f, |
| 0xa7, 0x1c, 0xc9, 0x09, 0x69, 0x9a, 0x83, 0xcf, |
| 0x29, 0x39, 0xb9, 0xe9, 0x4c, 0xff, 0x43, 0xab |
| }; |
| |
| // the iv |
| private byte[] iv; |
| |
| // the version number |
| private int version = 0; |
| |
| // the effective key size |
| private int effectiveKeySize = 0; |
| |
| public RC2Parameters() {} |
| |
| protected void engineInit(AlgorithmParameterSpec paramSpec) |
| throws InvalidParameterSpecException { |
| |
| if (!(paramSpec instanceof RC2ParameterSpec)) { |
| throw new InvalidParameterSpecException |
| ("Inappropriate parameter specification"); |
| } |
| RC2ParameterSpec rps = (RC2ParameterSpec) paramSpec; |
| |
| // check effective key size (a value of 0 means it is unspecified) |
| effectiveKeySize = rps.getEffectiveKeyBits(); |
| if (effectiveKeySize != 0) { |
| if (effectiveKeySize < 1 || effectiveKeySize > 1024) { |
| throw new InvalidParameterSpecException("RC2 effective key " + |
| "size must be between 1 and 1024 bits"); |
| } |
| if (effectiveKeySize < 256) { |
| version = EKB_TABLE[effectiveKeySize]; |
| } else { |
| version = effectiveKeySize; |
| } |
| } |
| this.iv = rps.getIV(); |
| } |
| |
| protected void engineInit(byte[] encoded) throws IOException { |
| DerValue val = new DerValue(encoded); |
| // check if IV or params |
| if (val.tag == DerValue.tag_Sequence) { |
| val.data.reset(); |
| |
| version = val.data.getInteger(); |
| if (version < 0 || version > 1024) { |
| throw new IOException("RC2 parameter parsing error: " + |
| "version number out of legal range (0-1024): " + version); |
| } |
| if (version > 255) { |
| effectiveKeySize = version; |
| } else { |
| // search table for index containing version |
| for (int i = 0; i < EKB_TABLE.length; i++) { |
| if (version == EKB_TABLE[i]) { |
| effectiveKeySize = i; |
| break; |
| } |
| } |
| } |
| |
| iv = val.data.getOctetString(); |
| } else { |
| val.data.reset(); |
| iv = val.getOctetString(); |
| version = 0; |
| effectiveKeySize = 0; |
| } |
| |
| if (iv.length != 8) { |
| throw new IOException("RC2 parameter parsing error: iv length " + |
| "must be 8 bits, actual: " + iv.length); |
| } |
| |
| if (val.data.available() != 0) { |
| throw new IOException("RC2 parameter parsing error: extra data"); |
| } |
| } |
| |
| protected void engineInit(byte[] encoded, String decodingMethod) |
| throws IOException { |
| engineInit(encoded); |
| } |
| |
| protected AlgorithmParameterSpec engineGetParameterSpec(Class paramSpec) |
| throws InvalidParameterSpecException { |
| |
| if (RC2ParameterSpec.class.isAssignableFrom(paramSpec)) { |
| return (iv == null ? |
| new RC2ParameterSpec(effectiveKeySize) : |
| new RC2ParameterSpec(effectiveKeySize, iv)); |
| } else { |
| throw new InvalidParameterSpecException |
| ("Inappropriate parameter specification"); |
| } |
| } |
| |
| protected byte[] engineGetEncoded() throws IOException { |
| DerOutputStream out = new DerOutputStream(); |
| DerOutputStream bytes = new DerOutputStream(); |
| |
| if (this.effectiveKeySize != 0) { |
| bytes.putInteger(version); |
| bytes.putOctetString(iv); |
| out.write(DerValue.tag_Sequence, bytes); |
| } else { |
| out.putOctetString(iv); |
| } |
| |
| 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"); |
| HexDumpEncoder encoder = new HexDumpEncoder(); |
| StringBuilder sb |
| = new StringBuilder(LINE_SEP + " iv:" + LINE_SEP + "[" |
| + encoder.encodeBuffer(iv) + "]"); |
| |
| if (version != 0) { |
| sb.append(LINE_SEP + "version:" + LINE_SEP |
| + version + LINE_SEP); |
| } |
| return sb.toString(); |
| } |
| } |