J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2003-2007 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun in the LICENSE file that accompanied this code. |
| 10 | * |
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 14 | * version 2 for more details (a copy is included in the LICENSE file that |
| 15 | * accompanied this code). |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License version |
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | * |
| 21 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | package com.sun.crypto.provider; |
| 27 | |
| 28 | import java.io.IOException; |
| 29 | import java.security.AlgorithmParametersSpi; |
| 30 | import java.security.spec.AlgorithmParameterSpec; |
| 31 | import java.security.spec.InvalidParameterSpecException; |
| 32 | import javax.crypto.spec.RC2ParameterSpec; |
| 33 | import sun.misc.HexDumpEncoder; |
| 34 | import sun.security.util.*; |
| 35 | |
| 36 | /** |
| 37 | * This class implements the parameter set used with RC2 |
| 38 | * encryption, which is defined in RFC2268 as follows: |
| 39 | * |
| 40 | * <pre> |
| 41 | * RC2-CBCParameter ::= CHOICE { |
| 42 | * iv IV, |
| 43 | * params SEQUENCE { |
| 44 | * version RC2Version, |
| 45 | * iv IV |
| 46 | * } |
| 47 | * } |
| 48 | * |
| 49 | * where |
| 50 | * |
| 51 | * IV ::= OCTET STRING -- 8 octets |
| 52 | * RC2Version ::= INTEGER -- 1-1024 |
| 53 | * </pre> |
| 54 | * |
| 55 | * @author Sean Mullan |
| 56 | * @since 1.5 |
| 57 | */ |
| 58 | |
| 59 | public final class RC2Parameters extends AlgorithmParametersSpi { |
| 60 | |
| 61 | // TABLE[EKB] from section 6 of RFC 2268, used to convert effective key |
| 62 | // size to/from encoded version number |
| 63 | private final static int[] EKB_TABLE = new int[] { |
| 64 | 0xbd, 0x56, 0xea, 0xf2, 0xa2, 0xf1, 0xac, 0x2a, |
| 65 | 0xb0, 0x93, 0xd1, 0x9c, 0x1b, 0x33, 0xfd, 0xd0, |
| 66 | 0x30, 0x04, 0xb6, 0xdc, 0x7d, 0xdf, 0x32, 0x4b, |
| 67 | 0xf7, 0xcb, 0x45, 0x9b, 0x31, 0xbb, 0x21, 0x5a, |
| 68 | 0x41, 0x9f, 0xe1, 0xd9, 0x4a, 0x4d, 0x9e, 0xda, |
| 69 | 0xa0, 0x68, 0x2c, 0xc3, 0x27, 0x5f, 0x80, 0x36, |
| 70 | 0x3e, 0xee, 0xfb, 0x95, 0x1a, 0xfe, 0xce, 0xa8, |
| 71 | 0x34, 0xa9, 0x13, 0xf0, 0xa6, 0x3f, 0xd8, 0x0c, |
| 72 | 0x78, 0x24, 0xaf, 0x23, 0x52, 0xc1, 0x67, 0x17, |
| 73 | 0xf5, 0x66, 0x90, 0xe7, 0xe8, 0x07, 0xb8, 0x60, |
| 74 | 0x48, 0xe6, 0x1e, 0x53, 0xf3, 0x92, 0xa4, 0x72, |
| 75 | 0x8c, 0x08, 0x15, 0x6e, 0x86, 0x00, 0x84, 0xfa, |
| 76 | 0xf4, 0x7f, 0x8a, 0x42, 0x19, 0xf6, 0xdb, 0xcd, |
| 77 | 0x14, 0x8d, 0x50, 0x12, 0xba, 0x3c, 0x06, 0x4e, |
| 78 | 0xec, 0xb3, 0x35, 0x11, 0xa1, 0x88, 0x8e, 0x2b, |
| 79 | 0x94, 0x99, 0xb7, 0x71, 0x74, 0xd3, 0xe4, 0xbf, |
| 80 | 0x3a, 0xde, 0x96, 0x0e, 0xbc, 0x0a, 0xed, 0x77, |
| 81 | 0xfc, 0x37, 0x6b, 0x03, 0x79, 0x89, 0x62, 0xc6, |
| 82 | 0xd7, 0xc0, 0xd2, 0x7c, 0x6a, 0x8b, 0x22, 0xa3, |
| 83 | 0x5b, 0x05, 0x5d, 0x02, 0x75, 0xd5, 0x61, 0xe3, |
| 84 | 0x18, 0x8f, 0x55, 0x51, 0xad, 0x1f, 0x0b, 0x5e, |
| 85 | 0x85, 0xe5, 0xc2, 0x57, 0x63, 0xca, 0x3d, 0x6c, |
| 86 | 0xb4, 0xc5, 0xcc, 0x70, 0xb2, 0x91, 0x59, 0x0d, |
| 87 | 0x47, 0x20, 0xc8, 0x4f, 0x58, 0xe0, 0x01, 0xe2, |
| 88 | 0x16, 0x38, 0xc4, 0x6f, 0x3b, 0x0f, 0x65, 0x46, |
| 89 | 0xbe, 0x7e, 0x2d, 0x7b, 0x82, 0xf9, 0x40, 0xb5, |
| 90 | 0x1d, 0x73, 0xf8, 0xeb, 0x26, 0xc7, 0x87, 0x97, |
| 91 | 0x25, 0x54, 0xb1, 0x28, 0xaa, 0x98, 0x9d, 0xa5, |
| 92 | 0x64, 0x6d, 0x7a, 0xd4, 0x10, 0x81, 0x44, 0xef, |
| 93 | 0x49, 0xd6, 0xae, 0x2e, 0xdd, 0x76, 0x5c, 0x2f, |
| 94 | 0xa7, 0x1c, 0xc9, 0x09, 0x69, 0x9a, 0x83, 0xcf, |
| 95 | 0x29, 0x39, 0xb9, 0xe9, 0x4c, 0xff, 0x43, 0xab |
| 96 | }; |
| 97 | |
| 98 | // the iv |
| 99 | private byte[] iv; |
| 100 | |
| 101 | // the version number |
| 102 | private int version = 0; |
| 103 | |
| 104 | // the effective key size |
| 105 | private int effectiveKeySize = 0; |
| 106 | |
| 107 | public RC2Parameters() {} |
| 108 | |
| 109 | protected void engineInit(AlgorithmParameterSpec paramSpec) |
| 110 | throws InvalidParameterSpecException { |
| 111 | |
| 112 | if (!(paramSpec instanceof RC2ParameterSpec)) { |
| 113 | throw new InvalidParameterSpecException |
| 114 | ("Inappropriate parameter specification"); |
| 115 | } |
| 116 | RC2ParameterSpec rps = (RC2ParameterSpec) paramSpec; |
| 117 | |
| 118 | // check effective key size (a value of 0 means it is unspecified) |
| 119 | effectiveKeySize = rps.getEffectiveKeyBits(); |
| 120 | if (effectiveKeySize != 0) { |
| 121 | if (effectiveKeySize < 1 || effectiveKeySize > 1024) { |
| 122 | throw new InvalidParameterSpecException("RC2 effective key " + |
| 123 | "size must be between 1 and 1024 bits"); |
| 124 | } |
| 125 | if (effectiveKeySize < 256) { |
| 126 | version = EKB_TABLE[effectiveKeySize]; |
| 127 | } else { |
| 128 | version = effectiveKeySize; |
| 129 | } |
| 130 | } |
| 131 | this.iv = rps.getIV(); |
| 132 | } |
| 133 | |
| 134 | protected void engineInit(byte[] encoded) throws IOException { |
| 135 | DerValue val = new DerValue(encoded); |
| 136 | // check if IV or params |
| 137 | if (val.tag == DerValue.tag_Sequence) { |
| 138 | val.data.reset(); |
| 139 | |
| 140 | version = val.data.getInteger(); |
| 141 | if (version < 0 || version > 1024) { |
| 142 | throw new IOException("RC2 parameter parsing error: " + |
| 143 | "version number out of legal range (0-1024): " + version); |
| 144 | } |
| 145 | if (version > 255) { |
| 146 | effectiveKeySize = version; |
| 147 | } else { |
| 148 | // search table for index containing version |
| 149 | for (int i = 0; i < EKB_TABLE.length; i++) { |
| 150 | if (version == EKB_TABLE[i]) { |
| 151 | effectiveKeySize = i; |
| 152 | break; |
| 153 | } |
| 154 | } |
| 155 | } |
| 156 | |
| 157 | iv = val.data.getOctetString(); |
| 158 | } else { |
| 159 | val.data.reset(); |
| 160 | iv = val.getOctetString(); |
| 161 | version = 0; |
| 162 | effectiveKeySize = 0; |
| 163 | } |
| 164 | |
| 165 | if (iv.length != 8) { |
| 166 | throw new IOException("RC2 parameter parsing error: iv length " + |
| 167 | "must be 8 bits, actual: " + iv.length); |
| 168 | } |
| 169 | |
| 170 | if (val.data.available() != 0) { |
| 171 | throw new IOException("RC2 parameter parsing error: extra data"); |
| 172 | } |
| 173 | } |
| 174 | |
| 175 | protected void engineInit(byte[] encoded, String decodingMethod) |
| 176 | throws IOException { |
| 177 | engineInit(encoded); |
| 178 | } |
| 179 | |
| 180 | protected AlgorithmParameterSpec engineGetParameterSpec(Class paramSpec) |
| 181 | throws InvalidParameterSpecException { |
| 182 | |
| 183 | if (RC2ParameterSpec.class.isAssignableFrom(paramSpec)) { |
| 184 | return (iv == null ? |
| 185 | new RC2ParameterSpec(effectiveKeySize) : |
| 186 | new RC2ParameterSpec(effectiveKeySize, iv)); |
| 187 | } else { |
| 188 | throw new InvalidParameterSpecException |
| 189 | ("Inappropriate parameter specification"); |
| 190 | } |
| 191 | } |
| 192 | |
| 193 | protected byte[] engineGetEncoded() throws IOException { |
| 194 | DerOutputStream out = new DerOutputStream(); |
| 195 | DerOutputStream bytes = new DerOutputStream(); |
| 196 | |
| 197 | if (this.effectiveKeySize != 0) { |
| 198 | bytes.putInteger(version); |
| 199 | bytes.putOctetString(iv); |
| 200 | out.write(DerValue.tag_Sequence, bytes); |
| 201 | } else { |
| 202 | out.putOctetString(iv); |
| 203 | } |
| 204 | |
| 205 | return out.toByteArray(); |
| 206 | } |
| 207 | |
| 208 | protected byte[] engineGetEncoded(String encodingMethod) |
| 209 | throws IOException { |
| 210 | return engineGetEncoded(); |
| 211 | } |
| 212 | |
| 213 | /* |
| 214 | * Returns a formatted string describing the parameters. |
| 215 | */ |
| 216 | protected String engineToString() { |
| 217 | String LINE_SEP = System.getProperty("line.separator"); |
| 218 | HexDumpEncoder encoder = new HexDumpEncoder(); |
| 219 | StringBuilder sb |
| 220 | = new StringBuilder(LINE_SEP + " iv:" + LINE_SEP + "[" |
| 221 | + encoder.encodeBuffer(iv) + "]"); |
| 222 | |
| 223 | if (version != 0) { |
| 224 | sb.append(LINE_SEP + "version:" + LINE_SEP |
| 225 | + version + LINE_SEP); |
| 226 | } |
| 227 | return sb.toString(); |
| 228 | } |
| 229 | } |