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| 1 | /* | ||
| 2 | * Copyright (c) 2002, 2007, Oracle and/or its affiliates. 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. Oracle designates this | ||
| 8 | * particular file as subject to the "Classpath" exception as provided | ||
| 9 | * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | ||
| 22 | * or visit www.oracle.com if you need additional information or have any | ||
| 23 | * questions. | ||
| 24 | */ | ||
| 25 | |||
| 26 | package com.sun.crypto.provider; | ||
| 27 | |||
| 28 | import java.util.*; | ||
| 29 | import java.io.*; | ||
| 30 | import sun.security.util.*; | ||
| 31 | import sun.misc.HexDumpEncoder; | ||
| 32 | import java.security.spec.AlgorithmParameterSpec; | ||
| 33 | import java.security.spec.InvalidParameterSpecException; | ||
| 34 | import javax.crypto.spec.IvParameterSpec; | ||
| 35 | |||
| 36 | /** | ||
| 37 | * This class implements the parameter (IV) used with Block Ciphers | ||
| 38 | * in feedback-mode. IV is defined in the standards as follows: | ||
| 39 | * | ||
| 40 | * <pre> | ||
| 41 | * IV ::= OCTET STRING -- length depends on the block size of the | ||
| 42 | * block ciphers | ||
| 43 | * </pre> | ||
| 44 | * | ||
| 45 | * @author Valerie Peng | ||
| 46 | * | ||
| 47 | */ | ||
| 48 | final class BlockCipherParamsCore { | ||
| 49 | private int block_size = 0; | ||
| 50 | private byte[] iv = null; | ||
| 51 | |||
| 52 | BlockCipherParamsCore(int blksize) { | ||
| 53 | block_size = blksize; | ||
| 54 | } | ||
| 55 | |||
| 56 | void init(AlgorithmParameterSpec paramSpec) | ||
| 57 | throws InvalidParameterSpecException { | ||
| 58 | if (!(paramSpec instanceof IvParameterSpec)) { | ||
| 59 | throw new InvalidParameterSpecException | ||
| 60 | ("Inappropriate parameter specification"); | ||
| 61 | } | ||
| 62 | byte[] tmpIv = ((IvParameterSpec)paramSpec).getIV(); | ||
| 63 | if (tmpIv.length != block_size) { | ||
| 64 | throw new InvalidParameterSpecException("IV not " + | ||
| 65 | block_size + " bytes long"); | ||
| 66 | } | ||
| 67 | iv = (byte[]) tmpIv.clone(); | ||
| 68 | } | ||
| 69 | |||
| 70 | void init(byte[] encoded) throws IOException { | ||
| 71 | DerInputStream der = new DerInputStream(encoded); | ||
| 72 | |||
| 73 | byte[] tmpIv = der.getOctetString(); | ||
| 74 | if (der.available() != 0) { | ||
| 75 | throw new IOException("IV parsing error: extra data"); | ||
| 76 | } | ||
| 77 | if (tmpIv.length != block_size) { | ||
| 78 | throw new IOException("IV not " + block_size + | ||
| 79 | " bytes long"); | ||
| 80 | } | ||
| 81 | iv = tmpIv; | ||
| 82 | } | ||
| 83 | |||
| 84 | void init(byte[] encoded, String decodingMethod) | ||
| 85 | throws IOException { | ||
| 86 | if ((decodingMethod != null) && | ||
| 87 | (!decodingMethod.equalsIgnoreCase("ASN.1"))) { | ||
| 88 | throw new IllegalArgumentException("Only support ASN.1 format"); | ||
| 89 | } | ||
| 90 | init(encoded); | ||
| 91 | } | ||
| 92 | |||
| 93 | AlgorithmParameterSpec getParameterSpec(Class paramSpec) | ||
| 94 | throws InvalidParameterSpecException | ||
| 95 | { | ||
| 96 | if (IvParameterSpec.class.isAssignableFrom(paramSpec)) { | ||
| 97 | return new IvParameterSpec(this.iv); | ||
| 98 | } else { | ||
| 99 | throw new InvalidParameterSpecException | ||
| 100 | ("Inappropriate parameter specification"); | ||
| 101 | } | ||
| 102 | } | ||
| 103 | |||
| 104 | byte[] getEncoded() throws IOException { | ||
| 105 | DerOutputStream out = new DerOutputStream(); | ||
| 106 | out.putOctetString(this.iv); | ||
| 107 | return out.toByteArray(); | ||
| 108 | } | ||
| 109 | |||
| 110 | byte[] getEncoded(String encodingMethod) | ||
| 111 | throws IOException { | ||
| 112 | return getEncoded(); | ||
| 113 | } | ||
| 114 | |||
| 115 | /* | ||
| 116 | * Returns a formatted string describing the parameters. | ||
| 117 | */ | ||
| 118 | public String toString() { | ||
| 119 | String LINE_SEP = System.getProperty("line.separator"); | ||
| 120 | |||
| 121 | String ivString = LINE_SEP + " iv:" + LINE_SEP + "["; | ||
| 122 | HexDumpEncoder encoder = new HexDumpEncoder(); | ||
| 123 | ivString += encoder.encodeBuffer(this.iv); | ||
| 124 | ivString += "]" + LINE_SEP; | ||
| 125 | return ivString; | ||
| 126 | } | ||
| 127 | } | ||