| /* | |
| * Copyright (c) 2003, 2022, 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.security.util.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 static final 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 <T extends AlgorithmParameterSpec> | |
| T engineGetParameterSpec(Class<T> paramSpec) | |
| throws InvalidParameterSpecException { | |
| if (paramSpec.isAssignableFrom(RC2ParameterSpec.class)) { | |
| return paramSpec.cast((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.lineSeparator(); | |
| 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(); | |
| } | |
| } |