15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Copyright (c) 2011 The Chromium Authors. All rights reserved. 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// found in the LICENSE file. 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 55821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// The original file was copied from sqlite, and was in the public domain. 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)/* 85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * This code implements the MD5 message-digest algorithm. 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * The algorithm is due to Ron Rivest. This code was 105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * written by Colin Plumb in 1993, no copyright is claimed. 115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * This code is in the public domain; do with it what you wish. 125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * 135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * Equivalent code is available from RSA Data Security, Inc. 145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * This code has been tested against that, and is equivalent, 155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * except that you don't need to include two pages of legalese 165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * with every copy. 175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * 185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * To compute the message digest of a chunk of bytes, declare an 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * MD5Context structure, pass it to MD5Init, call MD5Update as 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * needed on buffers full of bytes, and then call MD5Final, which 215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * will fill a supplied 16-byte array with the digest. 225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) */ 235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/md5.h" 255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/basictypes.h" 275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace { 295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)struct Context { 315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) uint32 buf[4]; 325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) uint32 bits[2]; 335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) unsigned char in[64]; 345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)}; 355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)/* 375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * Note: this code is harmless on little-endian machines. 385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) */ 395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void byteReverse(unsigned char *buf, unsigned longs) { 405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) uint32 t; 415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) do { 425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) t = (uint32)((unsigned)buf[3]<<8 | buf[2]) << 16 | 435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ((unsigned)buf[1]<<8 | buf[0]); 445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) *(uint32 *)buf = t; 455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) buf += 4; 465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } while (--longs); 475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)/* The four core functions - F1 is optimized somewhat */ 505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)/* #define F1(x, y, z) (x & y | ~x & z) */ 525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define F1(x, y, z) (z ^ (x & (y ^ z))) 535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define F2(x, y, z) F1(z, x, y) 545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define F3(x, y, z) (x ^ y ^ z) 555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define F4(x, y, z) (y ^ (x | ~z)) 565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)/* This is the central step in the MD5 algorithm. */ 585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define MD5STEP(f, w, x, y, z, data, s) \ 595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ( w += f(x, y, z) + data, w = w<<s | w>>(32-s), w += x ) 605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)/* 625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * The core of the MD5 algorithm, this alters an existing MD5 hash to 635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * reflect the addition of 16 longwords of new data. MD5Update blocks 645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * the data and converts bytes into longwords for this routine. 655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) */ 665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void MD5Transform(uint32 buf[4], const uint32 in[16]) { 675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) register uint32 a, b, c, d; 685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) a = buf[0]; 705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) b = buf[1]; 715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) c = buf[2]; 725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) d = buf[3]; 735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MD5STEP(F1, a, b, c, d, in[ 0]+0xd76aa478, 7); 755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MD5STEP(F1, d, a, b, c, in[ 1]+0xe8c7b756, 12); 765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MD5STEP(F1, c, d, a, b, in[ 2]+0x242070db, 17); 775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MD5STEP(F1, b, c, d, a, in[ 3]+0xc1bdceee, 22); 785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MD5STEP(F1, a, b, c, d, in[ 4]+0xf57c0faf, 7); 795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MD5STEP(F1, d, a, b, c, in[ 5]+0x4787c62a, 12); 805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MD5STEP(F1, c, d, a, b, in[ 6]+0xa8304613, 17); 815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MD5STEP(F1, b, c, d, a, in[ 7]+0xfd469501, 22); 825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MD5STEP(F1, a, b, c, d, in[ 8]+0x698098d8, 7); 835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MD5STEP(F1, d, a, b, c, in[ 9]+0x8b44f7af, 12); 845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MD5STEP(F1, c, d, a, b, in[10]+0xffff5bb1, 17); 855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MD5STEP(F1, b, c, d, a, in[11]+0x895cd7be, 22); 865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MD5STEP(F1, a, b, c, d, in[12]+0x6b901122, 7); 875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MD5STEP(F1, d, a, b, c, in[13]+0xfd987193, 12); 885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MD5STEP(F1, c, d, a, b, in[14]+0xa679438e, 17); 895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MD5STEP(F1, b, c, d, a, in[15]+0x49b40821, 22); 905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MD5STEP(F2, a, b, c, d, in[ 1]+0xf61e2562, 5); 925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MD5STEP(F2, d, a, b, c, in[ 6]+0xc040b340, 9); 935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MD5STEP(F2, c, d, a, b, in[11]+0x265e5a51, 14); 945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MD5STEP(F2, b, c, d, a, in[ 0]+0xe9b6c7aa, 20); 955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MD5STEP(F2, a, b, c, d, in[ 5]+0xd62f105d, 5); 965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MD5STEP(F2, d, a, b, c, in[10]+0x02441453, 9); 975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MD5STEP(F2, c, d, a, b, in[15]+0xd8a1e681, 14); 985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MD5STEP(F2, b, c, d, a, in[ 4]+0xe7d3fbc8, 20); 995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MD5STEP(F2, a, b, c, d, in[ 9]+0x21e1cde6, 5); 1005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MD5STEP(F2, d, a, b, c, in[14]+0xc33707d6, 9); 1015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MD5STEP(F2, c, d, a, b, in[ 3]+0xf4d50d87, 14); 1025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MD5STEP(F2, b, c, d, a, in[ 8]+0x455a14ed, 20); 1035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MD5STEP(F2, a, b, c, d, in[13]+0xa9e3e905, 5); 1045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MD5STEP(F2, d, a, b, c, in[ 2]+0xfcefa3f8, 9); 1055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MD5STEP(F2, c, d, a, b, in[ 7]+0x676f02d9, 14); 1065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MD5STEP(F2, b, c, d, a, in[12]+0x8d2a4c8a, 20); 1075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MD5STEP(F3, a, b, c, d, in[ 5]+0xfffa3942, 4); 1095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MD5STEP(F3, d, a, b, c, in[ 8]+0x8771f681, 11); 1105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MD5STEP(F3, c, d, a, b, in[11]+0x6d9d6122, 16); 1115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MD5STEP(F3, b, c, d, a, in[14]+0xfde5380c, 23); 1125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MD5STEP(F3, a, b, c, d, in[ 1]+0xa4beea44, 4); 1135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MD5STEP(F3, d, a, b, c, in[ 4]+0x4bdecfa9, 11); 1145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MD5STEP(F3, c, d, a, b, in[ 7]+0xf6bb4b60, 16); 1155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MD5STEP(F3, b, c, d, a, in[10]+0xbebfbc70, 23); 1165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MD5STEP(F3, a, b, c, d, in[13]+0x289b7ec6, 4); 1175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MD5STEP(F3, d, a, b, c, in[ 0]+0xeaa127fa, 11); 1185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MD5STEP(F3, c, d, a, b, in[ 3]+0xd4ef3085, 16); 1195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MD5STEP(F3, b, c, d, a, in[ 6]+0x04881d05, 23); 1205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MD5STEP(F3, a, b, c, d, in[ 9]+0xd9d4d039, 4); 1215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MD5STEP(F3, d, a, b, c, in[12]+0xe6db99e5, 11); 1225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MD5STEP(F3, c, d, a, b, in[15]+0x1fa27cf8, 16); 1235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MD5STEP(F3, b, c, d, a, in[ 2]+0xc4ac5665, 23); 1245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MD5STEP(F4, a, b, c, d, in[ 0]+0xf4292244, 6); 1265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MD5STEP(F4, d, a, b, c, in[ 7]+0x432aff97, 10); 1275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MD5STEP(F4, c, d, a, b, in[14]+0xab9423a7, 15); 1285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MD5STEP(F4, b, c, d, a, in[ 5]+0xfc93a039, 21); 1295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MD5STEP(F4, a, b, c, d, in[12]+0x655b59c3, 6); 1305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MD5STEP(F4, d, a, b, c, in[ 3]+0x8f0ccc92, 10); 1315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MD5STEP(F4, c, d, a, b, in[10]+0xffeff47d, 15); 1325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MD5STEP(F4, b, c, d, a, in[ 1]+0x85845dd1, 21); 1335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MD5STEP(F4, a, b, c, d, in[ 8]+0x6fa87e4f, 6); 1345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MD5STEP(F4, d, a, b, c, in[15]+0xfe2ce6e0, 10); 1355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MD5STEP(F4, c, d, a, b, in[ 6]+0xa3014314, 15); 1365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MD5STEP(F4, b, c, d, a, in[13]+0x4e0811a1, 21); 1375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MD5STEP(F4, a, b, c, d, in[ 4]+0xf7537e82, 6); 1385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MD5STEP(F4, d, a, b, c, in[11]+0xbd3af235, 10); 1395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MD5STEP(F4, c, d, a, b, in[ 2]+0x2ad7d2bb, 15); 1405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MD5STEP(F4, b, c, d, a, in[ 9]+0xeb86d391, 21); 1415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) buf[0] += a; 1435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) buf[1] += b; 1445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) buf[2] += c; 1455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) buf[3] += d; 1465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace 1495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace base { 1515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)/* 1535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * Start MD5 accumulation. Set bit count to 0 and buffer to mysterious 1545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * initialization constants. 1555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) */ 1565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void MD5Init(MD5Context* context) { 1575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) struct Context *ctx = (struct Context *)context; 1585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ctx->buf[0] = 0x67452301; 1595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ctx->buf[1] = 0xefcdab89; 1605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ctx->buf[2] = 0x98badcfe; 1615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ctx->buf[3] = 0x10325476; 1625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ctx->bits[0] = 0; 1635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ctx->bits[1] = 0; 1645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)/* 1675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * Update context to reflect the concatenation of another buffer full 1685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * of bytes. 1695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) */ 1705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void MD5Update(MD5Context* context, const StringPiece& data) { 1715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const unsigned char* inbuf = (const unsigned char*)data.data(); 1725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) size_t len = data.size(); 1735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) struct Context *ctx = (struct Context *)context; 1745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const unsigned char* buf = (const unsigned char*)inbuf; 1755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) uint32 t; 1765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /* Update bitcount */ 1785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) t = ctx->bits[0]; 1805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if ((ctx->bits[0] = t + ((uint32)len << 3)) < t) 1815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ctx->bits[1]++; /* Carry from low to high */ 1825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ctx->bits[1] += static_cast<uint32>(len >> 29); 1835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) t = (t >> 3) & 0x3f; /* Bytes already in shsInfo->data */ 1855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /* Handle any leading odd-sized chunks */ 1875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (t) { 1895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) unsigned char *p = (unsigned char *)ctx->in + t; 1905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) t = 64-t; 1925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (len < t) { 1935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) memcpy(p, buf, len); 1945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return; 1955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) memcpy(p, buf, t); 1975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) byteReverse(ctx->in, 16); 1985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MD5Transform(ctx->buf, (uint32 *)ctx->in); 1995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) buf += t; 2005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) len -= t; 2015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /* Process data in 64-byte chunks */ 2045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) while (len >= 64) { 2065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) memcpy(ctx->in, buf, 64); 2075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) byteReverse(ctx->in, 16); 2085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MD5Transform(ctx->buf, (uint32 *)ctx->in); 2095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) buf += 64; 2105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) len -= 64; 2115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /* Handle any remaining bytes of data. */ 2145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) memcpy(ctx->in, buf, len); 2165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)/* 2195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * Final wrapup - pad to 64-byte boundary with the bit pattern 2205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * 1 0* (64-bit count of bits processed, MSB-first) 2215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) */ 2225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void MD5Final(MD5Digest* digest, MD5Context* context) { 2235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) struct Context *ctx = (struct Context *)context; 2245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) unsigned count; 2255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) unsigned char *p; 2265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /* Compute number of bytes mod 64 */ 2285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) count = (ctx->bits[0] >> 3) & 0x3F; 2295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /* Set the first char of padding to 0x80. This is safe since there is 2315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) always at least one byte free */ 2325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) p = ctx->in + count; 2335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) *p++ = 0x80; 2345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /* Bytes of padding needed to make 64 bytes */ 2365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) count = 64 - 1 - count; 2375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /* Pad out to 56 mod 64 */ 2395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (count < 8) { 2405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /* Two lots of padding: Pad the first block to 64 bytes */ 2415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) memset(p, 0, count); 2425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) byteReverse(ctx->in, 16); 2435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MD5Transform(ctx->buf, (uint32 *)ctx->in); 2445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /* Now fill the next block with 56 bytes */ 2465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) memset(ctx->in, 0, 56); 2475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } else { 2485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /* Pad block to 56 bytes */ 2495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) memset(p, 0, count-8); 2505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) byteReverse(ctx->in, 14); 2525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /* Append length in bits and transform */ 254cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) memcpy(&ctx->in[14 * sizeof(ctx->bits[0])], 255cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) &ctx->bits[0], 256cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) sizeof(ctx->bits[0])); 257cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) memcpy(&ctx->in[15 * sizeof(ctx->bits[1])], 258cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) &ctx->bits[1], 259cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) sizeof(ctx->bits[1])); 2605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MD5Transform(ctx->buf, (uint32 *)ctx->in); 2625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) byteReverse((unsigned char *)ctx->buf, 4); 2635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) memcpy(digest->a, ctx->buf, 16); 2645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) memset(ctx, 0, sizeof(*ctx)); /* In case it's sensitive */ 2655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 267e5d81f57cb97b3b6b7fccc9c5610d21eb81db09dBen Murdochvoid MD5IntermediateFinal(MD5Digest* digest, const MD5Context* context) { 268e5d81f57cb97b3b6b7fccc9c5610d21eb81db09dBen Murdoch /* MD5Final mutates the MD5Context*. Make a copy for generating the 269e5d81f57cb97b3b6b7fccc9c5610d21eb81db09dBen Murdoch intermediate value. */ 270e5d81f57cb97b3b6b7fccc9c5610d21eb81db09dBen Murdoch MD5Context context_copy; 271e5d81f57cb97b3b6b7fccc9c5610d21eb81db09dBen Murdoch memcpy(&context_copy, context, sizeof(context_copy)); 272e5d81f57cb97b3b6b7fccc9c5610d21eb81db09dBen Murdoch MD5Final(digest, &context_copy); 273e5d81f57cb97b3b6b7fccc9c5610d21eb81db09dBen Murdoch} 274e5d81f57cb97b3b6b7fccc9c5610d21eb81db09dBen Murdoch 2755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)std::string MD5DigestToBase16(const MD5Digest& digest) { 2765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static char const zEncode[] = "0123456789abcdef"; 2775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) std::string ret; 2795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ret.resize(32); 2805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int j = 0; 2825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (int i = 0; i < 16; i ++) { 2835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int a = digest.a[i]; 2845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ret[j++] = zEncode[(a>>4)&0xf]; 2855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ret[j++] = zEncode[a & 0xf]; 2865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 2875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return ret; 2885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void MD5Sum(const void* data, size_t length, MD5Digest* digest) { 2915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MD5Context ctx; 2925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MD5Init(&ctx); 2935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MD5Update(&ctx, 2945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) StringPiece(reinterpret_cast<const char*>(data), length)); 2955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MD5Final(digest, &ctx); 2965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 2975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 2985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)std::string MD5String(const StringPiece& str) { 2995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MD5Digest digest; 3005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) MD5Sum(str.data(), str.length(), &digest); 3015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return MD5DigestToBase16(digest); 3025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 3035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 3045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace base 305