1f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project/* 2f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Licensed to the Apache Software Foundation (ASF) under one or more 3f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * contributor license agreements. See the NOTICE file distributed with 4f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * this work for additional information regarding copyright ownership. 5f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * The ASF licenses this file to You under the Apache License, Version 2.0 6f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * (the "License"); you may not use this file except in compliance with 7f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * the License. You may obtain a copy of the License at 8f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 9f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * http://www.apache.org/licenses/LICENSE-2.0 10f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 11f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Unless required by applicable law or agreed to in writing, software 12f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * distributed under the License is distributed on an "AS IS" BASIS, 13f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * See the License for the specific language governing permissions and 15f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * limitations under the License. 16f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 17f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 18f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 19f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectpackage org.apache.harmony.security.provider.crypto; 20f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 21f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 22f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectimport java.security.MessageDigestSpi; 23f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectimport java.security.DigestException; 24f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 25f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectimport java.util.Arrays; 26f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 27f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectimport org.apache.harmony.security.internal.nls.Messages; 28f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectimport org.apache.harmony.security.provider.crypto.SHA1_Data; 29f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectimport org.apache.harmony.security.provider.crypto.SHA1Impl; 30f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 31f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 32f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project/** 33f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * This class extends the MessageDigestSpi class implementing all its abstract methods; 34f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * it overrides the "Object clone()" and "int engineGetDigestLength()" methods. <BR> 35f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * The class implements the Cloneable interface. 36f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 37f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 38f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 39f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectpublic class SHA1_MessageDigestImpl extends MessageDigestSpi 40f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project implements Cloneable, SHA1_Data { 41f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 42f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 43f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project private int buffer[]; // buffer has the following structure: 44f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project // - 0-16 - frame for accumulating a message 45f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project // - 17-79 - for SHA1Impl methods 46f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project // - 80 - unused 47f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project // - 81 - to store length of the message 48f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project // - 82-86 - frame for current message digest 49f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 50f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project private byte oneByte[]; // one byte buffer needed to use in engineUpdate(byte) 51f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project // having buffer as private field is just optimization 52f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 53f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project private int messageLength; // total length of bytes supplied by user 54f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 55f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 56f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /** 57f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * The constructor creates needed buffers and sets the engine at initial state 58f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 59f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project public SHA1_MessageDigestImpl() { 60f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 61f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project // BYTES_OFFSET +6 is minimal length required by methods in SHA1Impl 62f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project buffer = new int[BYTES_OFFSET +6]; 63f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 64f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project oneByte = new byte[1]; 65f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 66f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project engineReset(); 67f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 68f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 69f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 70f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /** 71f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * The method performs final actions and invokes the "computeHash(int[])" method. 72f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * In case if there is no enough words in current frame 73f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * after processing its data, extra frame is prepared and 74f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * the "computeHash(int[])" method is invoked second time. <BR> 75f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 76f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * After processing, the method resets engine's state 77f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 78f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * @param 79f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * digest - byte array 80f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * @param 81f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * offset - offset in digest 82f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 83f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project private void processDigest(byte[] digest, int offset) { 84f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 85f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project int i, j; // implementation variables 86f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project int lastWord; // 87f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 88f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project long nBits = messageLength <<3 ; // length has to be calculated before padding 89f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 90f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project engineUpdate( (byte) 0x80 ); // beginning byte in padding 91f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 92f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project i = 0; // i contains number of beginning word for following loop 93f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 94f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project lastWord = (buffer[BYTES_OFFSET] + 3)>>2 ; // computing of # of full words by shifting 95f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project // # of bytes 96f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 97f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project // possible cases: 98f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project // 99f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project // - buffer[BYTES_OFFSET] == 0 - buffer frame is empty, 100f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project // padding byte was 64th in previous frame 101f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project // current frame should contain only message's length 102f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project // 103f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project // - lastWord < 14 - two last, these are 14 & 15, words in 16 word frame are free; 104f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project // no extra frame needed 105f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project // - lastWord = 14 - only one last, namely 15-th, word in frame doesn't contain bytes; 106f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project // extra frame is needed 107f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project // - lastWord > 14 - last word in frame is not full; 108f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project // extra frame is needed 109f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 110f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if ( buffer[BYTES_OFFSET] != 0 ) { 111f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 112f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if ( lastWord < 15 ) { 113f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project i = lastWord; 114f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } else { 115f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if ( lastWord == 15 ) { 116f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project buffer[15] = 0; // last word in frame is set to "0" 117f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 118f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project SHA1Impl.computeHash(buffer); 119f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project i = 0; 120f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 121f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 122f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project Arrays.fill(buffer, i, 14, 0); 123f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 124f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project buffer[14] = (int)( nBits >>>32 ); 125f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project buffer[15] = (int)( nBits & 0xFFFFFFFF ); 126f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project SHA1Impl.computeHash(buffer); 127f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 128f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project // converting 5-word frame into 20 bytes 129f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project j = offset; 130f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project for ( i = HASH_OFFSET; i < HASH_OFFSET +5; i++ ) { 131f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project int k = buffer[i]; 132f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project digest[j ] = (byte) ( k >>>24 ); // getting first byte from left 133f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project digest[j+1] = (byte) ( k >>>16 ); // getting second byte from left 134f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project digest[j+2] = (byte) ( k >>> 8 ); // getting third byte from left 135f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project digest[j+3] = (byte) ( k ); // getting fourth byte from left 136f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project j += 4; 137f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 138f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 139f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project engineReset(); 140f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 141f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 142f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project // methods specified in java.security.MessageDigestSpi 143f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 144f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /** 145f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Returns a "deep" copy of this SHA1MDImpl object. <BR> 146f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 147f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * The method overrides "clone()" in class Object. <BR> 148f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 149f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * @return 150f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * a clone of this object 151f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 152f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project public Object clone() throws CloneNotSupportedException { 153f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 154f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project SHA1_MessageDigestImpl cloneObj = (SHA1_MessageDigestImpl) super.clone(); 155f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 156f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project cloneObj.buffer = ( int[])buffer.clone(); 157f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project cloneObj.oneByte = (byte[])oneByte.clone(); 158f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 159f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project return cloneObj; 160f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 161f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 162f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 163f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /** 164f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Computes a message digest value. <BR> 165f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 166f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * The method resets the engine. <BR> 167f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 168f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * The method overrides "engineDigest()" in class MessageDigestSpi. <BR> 169f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 170f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * @return 171f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * byte array containing message digest value 172f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 173f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project protected byte[] engineDigest() { 174f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 175f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project byte[] hash = new byte[DIGEST_LENGTH]; 176f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 177f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project processDigest(hash, 0); 178f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project return hash; 179f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 180f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 181f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 182f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /** 183f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Computes message digest value. 184f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Upon return, the value is stored in "buf" buffer beginning "offset" byte. <BR> 185f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 186f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * The method resets the engine. <BR> 187f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 188f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * The method overrides "engineDigest(byte[],int,int) in class MessageDigestSpi. 189f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 190f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * @param 191f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * buf byte array to store a message digest returned 192f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * @param 193f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * offset a position in the array for first byte of the message digest 194f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * @param 195f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * len number of bytes within buffer allotted for the message digest; 196f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * as this implementation doesn't provide partial digests, 197f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * len should be >= 20, DigestException is thrown otherwise 198f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * @return 199f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * the length of the message digest stored in the "buf" buffer; 200f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * in this implementation the length=20 201f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 202f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * @throws IllegalArgumentException 203f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * if null is passed to the "buf" argument <BR> 204f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * if offset + len > buf.length <BR> 205f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * if offset > buf.length or len > buf.length 206f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 207f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * @throws DigestException 208f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * if len < 20 209f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 210f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * @throws ArrayIndexOutOfBoundsException 211f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * if offset < 0 212f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 213f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project protected int engineDigest(byte[] buf, int offset, int len) throws DigestException { 214f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 215f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if ( buf == null ) { 216f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project throw new IllegalArgumentException(Messages.getString("security.162")); //$NON-NLS-1$ 217f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 218f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if ( offset > buf.length || len > buf.length || (len + offset) > buf.length ) { 219f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project throw new IllegalArgumentException( 220f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project Messages.getString("security.163")); //$NON-NLS-1$ 221f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 222f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if ( len < DIGEST_LENGTH ) { 223f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project throw new DigestException(Messages.getString("security.164")); //$NON-NLS-1$ 224f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 225f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if ( offset < 0 ) { 226f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project throw new ArrayIndexOutOfBoundsException(Messages.getString("security.165", offset)); //$NON-NLS-1$ 227f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 228f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 229f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project processDigest(buf, offset); 230f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 231f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project return DIGEST_LENGTH; 232f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 233f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 234f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 235f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /** 236f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Returns a message digest length. <BR> 237f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 238f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * The method overrides "engineGetDigestLength()" in class MessageDigestSpi. <BR> 239f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 240f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * @return 241f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * total length of current message digest as an int value 242f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 243f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project protected int engineGetDigestLength() { 244f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project return DIGEST_LENGTH; 245f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 246f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 247f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 248f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /** 249f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Resets the engine. <BR> 250f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 251f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * The method overrides "engineReset()" in class MessageDigestSpi. <BR> 252f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 253f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project protected void engineReset() { 254f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 255f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project messageLength = 0; 256f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 257f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project buffer[BYTES_OFFSET] = 0; 258f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project buffer[HASH_OFFSET ] = H0; 259f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project buffer[HASH_OFFSET +1] = H1; 260f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project buffer[HASH_OFFSET +2] = H2; 261f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project buffer[HASH_OFFSET +3] = H3; 262f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project buffer[HASH_OFFSET +4] = H4; 263f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 264f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 265f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 266f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /** 267f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Supplements a byte to current message. <BR> 268f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 269f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * The method overrides "engineUpdate(byte)" in class MessageDigestSpi. <BR> 270f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 271f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * @param 272f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * input byte to add to current message 273f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 274f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project protected void engineUpdate(byte input) { 275f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 276f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project oneByte[0] = input; 277f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project SHA1Impl.updateHash( buffer, oneByte, 0, 0 ); 278f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project messageLength++; 279f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 280f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 281f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 282f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /** 283f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Updates current message. <BR> 284f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 285f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * The method overrides "engineUpdate(byte[],int,int)" in class MessageDigestSpi. <BR> 286f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 287f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * The method silently returns if "len" <= 0. 288f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 289f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * @param 290f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * input a byte array 291f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * @param 292f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * offset a number of first byte in the "input" array to use for updating 293f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * @param 294f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * len a number of bytes to use 295f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 296f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * @throws NullPointerException 297f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * if null is passed to the "buf" argument 298f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 299f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * @throws IllegalArgumentException 300f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * if offset > buf.length or len > buf.length or 301f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * (len + offset) > buf.length 302f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * @throws ArrayIndexOutOfBoundsException 303f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * offset < 0 304f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 305f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project protected void engineUpdate(byte[] input, int offset, int len) { 306f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 307f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if ( input == null ) { 308f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project throw new IllegalArgumentException(Messages.getString("security.166")); //$NON-NLS-1$ 309f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 310f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if ( len <= 0 ) { 311f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project return; 312f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 313f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if ( offset < 0 ) { 314f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project throw new ArrayIndexOutOfBoundsException(Messages.getString("security.165", offset)); //$NON-NLS-1$ 315f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 316f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if ( offset > input.length || len > input.length || (len + offset) > input.length ) { 317f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project throw new IllegalArgumentException( 318f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project Messages.getString("security.167")); //$NON-NLS-1$ 319f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 320f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 321f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project SHA1Impl.updateHash(buffer, input, offset, offset + len -1 ); 322f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project messageLength += len; 323f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 324f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 325f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project} 326