md5.c
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上传日期:2007-01-17
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- /* md5.c - RSA Data Security, Inc., MD5 message-digest algorithm */
- /* Copyright 1984 - 2001 Wind River Systems, Inc. */
- #include "copyright_wrs.h"
- /*
- modification history
- --------------------
- 01a,29mar01,spm file creation: copied from version 01g of tor2_0.open_stack
- branch (wpwr VOB) for unified code base
- */
- /*
- * Copyright (C) 1991-2, RSA Data Security, Inc. Created 1991. All
- * rights reserved.
- *
- * License to copy and use this software is granted provided that it
- * is identified as the "RSA Data Security, Inc. MD5 Message-Digest
- * Algorithm" in all material mentioning or referencing this software
- * or this function.
- *
- * License is also granted to make and use derivative works provided
- * that such works are identified as "derived from the RSA Data
- * Security, Inc. MD5 Message-Digest Algorithm" in all material
- * mentioning or referencing the derived work.
- *
- * RSA Data Security, Inc. makes no representations concerning either
- * the merchantability of this software or the suitability of this
- * software for any particular purpose. It is provided "as is"
- * without express or implied warranty of any kind.
- *
- * These notices must be retained in any copies of any part of this
- * documentation and/or software.
- */
- /*
- DESCRIPTION
- This module implements the Message Digest 5 (MD5) algorithm. To create
- a message digest of a block of text the following is used:
- MD5_CTX_T ctx
- MD5Init(&ctx)
- MD5Update(&ctx, text)
- MD5Final(digest, &ctx)
- Simply create a context and initialize it. Then use MD5Update to
- add to the message digest. Note that MD5Update can be called any number
- of times. Then call MD5Final which creates and stores the calculated
- 16 byte digest.
- INCLUDES: md5.h
- SEE ALSO: RFC 1321
- */
- #ifdef RIP_MD5
- /* defines */
- #define MD5_TEST 0
- /* includes */
- #include "string.h"
- #include "vxWorks.h"
- #include "rip/md5.h"
- /* forward declarations */
- LOCAL void MD5Transform(ULONG [4], UCHAR [64]);
- /* locals */
- LOCAL UCHAR PADDING[64] =
- {
- 0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
- };
- /* defines */
- /* Constants for MD5 Transform routine */
- #define S11 7
- #define S12 12
- #define S13 17
- #define S14 22
- #define S21 5
- #define S22 9
- #define S23 14
- #define S24 20
- #define S31 4
- #define S32 11
- #define S33 16
- #define S34 23
- #define S41 6
- #define S42 10
- #define S43 15
- #define S44 21
- /* macros */
- /* The so called "unbiased" bitwise auxiliary functions! */
- #define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
- #define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
- #define H(x, y, z) ((x) ^ (y) ^ (z))
- #define I(x, y, z) ((y) ^ ((x) | (~z)))
- /* ROTATE_LEFT rotates x left n bits (circular left shift) */
- #define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32 - (n))))
- /* Rounds 1(FF), 2(GG), 3(HH), and 4(II) transformations */
- #define FF(a, b, c, d, x, s, ac)
- {
- (a) += (F((b), (c), (d)) + (x) + (ULONG)(ac));
- (a) = ROTATE_LEFT((a), (s));
- (a) += (b);
- }
- #define GG(a, b, c, d, x, s, ac)
- {
- (a) += (G((b), (c), (d)) + (x) + (ULONG)(ac));
- (a) = ROTATE_LEFT((a), (s));
- (a) += (b);
- }
- #define HH(a, b, c, d, x, s, ac)
- {
- (a) += (H((b), (c), (d)) + (x) + (ULONG)(ac));
- (a) = ROTATE_LEFT((a), (s));
- (a) += (b);
- }
- #define II(a, b, c, d, x, s, ac)
- {
- (a) += (I((b), (c), (d)) + (x) + (ULONG)(ac));
- (a) = ROTATE_LEFT((a), (s));
- (a) += (b);
- }
- /***************************************************************************
- * MD5Transform - Basic MD5 transformation.
- *
- * Transforms the state registers based on the given block.
- *
- * RETURNS: A new state.
- *
- * NOMANUAL
- */
- LOCAL void MD5Transform
- (
- ULONG state[4],
- UCHAR block[64]
- )
- {
- ULONG a, b, c, d;
- ULONG x[16];
- UINT i, j;
- /* Copy block[j] into x[i] */
- for (i = 0, j = 0; j < 64; i++, j += 4)
- {
- x[i] = (((ULONG)block[j]) |
- (((ULONG)block[j+1]) << 8) |
- (((ULONG)block[j+2]) << 16) |
- (((ULONG)block[j+3]) << 24));
- }
- /* Copy context->state[] to working vars */
- a = state[0];
- b = state[1];
- c = state[2];
- d = state[3];
- /*
- * The last argument of the following function is based of the
- * sine funciton. A 64 element table T[1...64] has been constructed
- * where T[i] denotes the i-th element of the table which is equal
- * to the integer part of 4294967296 times abs(sin(i)), i is in radians.
- * See the appendix of RFC 1321 for actual values.
- */
- /* Round 1 */
- FF(a, b, c, d, x[ 0], S11, 0xd76aa478); /* 1 */
- FF(d, a, b, c, x[ 1], S12, 0xe8c7b756); /* 2 */
- FF(c, d, a, b, x[ 2], S13, 0x242070db); /* 3 */
- FF(b, c, d, a, x[ 3], S14, 0xc1bdceee); /* 4 */
- FF(a, b, c, d, x[ 4], S11, 0xf57c0faf); /* 5 */
- FF(d, a, b, c, x[ 5], S12, 0x4787c62a); /* 6 */
- FF(c, d, a, b, x[ 6], S13, 0xa8304613); /* 7 */
- FF(b, c, d, a, x[ 7], S14, 0xfd469501); /* 8 */
- FF(a, b, c, d, x[ 8], S11, 0x698098d8); /* 9 */
- FF(d, a, b, c, x[ 9], S12, 0x8b44f7af); /* 10 */
- FF(c, d, a, b, x[10], S13, 0xffff5bb1); /* 11 */
- FF(b, c, d, a, x[11], S14, 0x895cd7be); /* 12 */
- FF(a, b, c, d, x[12], S11, 0x6b901122); /* 13 */
- FF(d, a, b, c, x[13], S12, 0xfd987193); /* 14 */
- FF(c, d, a, b, x[14], S13, 0xa679438e); /* 15 */
- FF(b, c, d, a, x[15], S14, 0x49b40821); /* 16 */
- /* Round 2 */
- GG(a, b, c, d, x[ 1], S21, 0xf61e2562); /* 17 */
- GG(d, a, b, c, x[ 6], S22, 0xc040b340); /* 18 */
- GG(c, d, a, b, x[11], S23, 0x265e5a51); /* 19 */
- GG(b, c, d, a, x[ 0], S24, 0xe9b6c7aa); /* 20 */
- GG(a, b, c, d, x[ 5], S21, 0xd62f105d); /* 21 */
- GG(d, a, b, c, x[10], S22, 0x2441453); /* 22 */
- GG(c, d, a, b, x[15], S23, 0xd8a1e681); /* 23 */
- GG(b, c, d, a, x[ 4], S24, 0xe7d3fbc8); /* 24 */
- GG(a, b, c, d, x[ 9], S21, 0x21e1cde6); /* 25 */
- GG(d, a, b, c, x[14], S22, 0xc33707d6); /* 26 */
- GG(c, d, a, b, x[ 3], S23, 0xf4d50d87); /* 27 */
- GG(b, c, d, a, x[ 8], S24, 0x455a14ed); /* 28 */
- GG(a, b, c, d, x[13], S21, 0xa9e3e905); /* 29 */
- GG(d, a, b, c, x[ 2], S22, 0xfcefa3f8); /* 30 */
- GG(c, d, a, b, x[ 7], S23, 0x676f02d9); /* 31 */
- GG(b, c, d, a, x[12], S24, 0x8d2a4c8a); /* 32 */
- /* Round 3 */
- HH(a, b, c, d, x[ 5], S31, 0xfffa3942); /* 33 */
- HH(d, a, b, c, x[ 8], S32, 0x8771f681); /* 34 */
- HH(c, d, a, b, x[11], S33, 0x6d9d6122); /* 35 */
- HH(b, c, d, a, x[14], S34, 0xfde5380c); /* 36 */
- HH(a, b, c, d, x[ 1], S31, 0xa4beea44); /* 37 */
- HH(d, a, b, c, x[ 4], S32, 0x4bdecfa9); /* 38 */
- HH(c, d, a, b, x[ 7], S33, 0xf6bb4b60); /* 39 */
- HH(b, c, d, a, x[10], S34, 0xbebfbc70); /* 40 */
- HH(a, b, c, d, x[13], S31, 0x289b7ec6); /* 41 */
- HH(d, a, b, c, x[ 0], S32, 0xeaa127fa); /* 42 */
- HH(c, d, a, b, x[ 3], S33, 0xd4ef3085); /* 43 */
- HH(b, c, d, a, x[ 6], S34, 0x4881d05); /* 44 */
- HH(a, b, c, d, x[ 9], S31, 0xd9d4d039); /* 45 */
- HH(d, a, b, c, x[12], S32, 0xe6db99e5); /* 46 */
- HH(c, d, a, b, x[15], S33, 0x1fa27cf8); /* 47 */
- HH(b, c, d, a, x[ 2], S34, 0xc4ac5665); /* 48 */
- /* Round 4 */
- II(a, b, c, d, x[ 0], S41, 0xf4292244); /* 49 */
- II(d, a, b, c, x[ 7], S42, 0x432aff97); /* 50 */
- II(c, d, a, b, x[14], S43, 0xab9423a7); /* 51 */
- II(b, c, d, a, x[ 5], S44, 0xfc93a039); /* 52 */
- II(a, b, c, d, x[12], S41, 0x655b59c3); /* 53 */
- II(d, a, b, c, x[ 3], S42, 0x8f0ccc92); /* 54 */
- II(c, d, a, b, x[10], S43, 0xffeff47d); /* 55 */
- II(b, c, d, a, x[ 1], S44, 0x85845dd1); /* 56 */
- II(a, b, c, d, x[ 8], S41, 0x6fa87e4f); /* 57 */
- II(d, a, b, c, x[15], S42, 0xfe2ce6e0); /* 58 */
- II(c, d, a, b, x[ 6], S43, 0xa3014314); /* 59 */
- II(b, c, d, a, x[13], S44, 0x4e0811a1); /* 60 */
- II(a, b, c, d, x[ 4], S41, 0xf7537e82); /* 61 */
- II(d, a, b, c, x[11], S42, 0xbd3af235); /* 62 */
- II(c, d, a, b, x[ 2], S43, 0x2ad7d2bb); /* 63 */
- II(b, c, d, a, x[ 9], S44, 0xeb86d391); /* 64 */
- /* increment each state register by the new value */
- state[0] += a;
- state[1] += b;
- state[2] += c;
- state[3] += d;
- /* Zeroize sensitive information */
- memset((UCHAR *)x, 0, sizeof(x));
- }
- /***************************************************************************
- *
- * MD5Init - Initialize the MD5 routine.
- *
- * Begins an MD5 operation by writing a new context.
- *
- * RETURNS: N/A
- */
- void MD5Init
- (
- MD5_CTX_T * context
- )
- {
- context->count[0] = context->count[1] = 0;
- /* Load magic initialization constants */
- context->state[0] = 0x67452301;
- context->state[1] = 0xefcdab89;
- context->state[2] = 0x98badcfe;
- context->state[3] = 0x10325476;
- }
- /***************************************************************************
- *
- * MD5Update - MD5 block update operation.
- *
- * Continues an MD5 message-digest operation by processing another
- * message block and updating the context.
- *
- * RETURNS: N/A
- */
- void MD5Update
- (
- MD5_CTX_T * context,
- UCHAR * input,
- UINT inputLen
- )
- {
- UINT i, index, partLen;
- /* Compute number of bytes mod 64 */
- index = (UINT)((context->count[0] >> 3) & 0x3F);
- /* Update number of bits */
- if ((context->count[0] += ((ULONG)inputLen << 3)) < ((ULONG)inputLen << 3))
- {
- context->count[1]++;
- }
- context->count[1] += ((ULONG)inputLen >> 29);
- partLen = 64 - index;
- /* Transform as many times as possible */
- if (inputLen >= partLen)
- {
- memcpy((UCHAR *)&context->buffer[index], (UCHAR *)input, partLen);
- MD5Transform((ULONG *)context->state, (UCHAR *)context->buffer);
- for (i = partLen; (i + 63) < inputLen; i += 64)
- {
- MD5Transform((ULONG *)context->state, (UCHAR *)&input[i]);
- }
- index = 0;
- }
- else
- {
- i = 0;
- }
- /* Buffer remaining input */
- memcpy((UCHAR *)&context->buffer[index], (UCHAR *)&input[i], inputLen - i);
- }
- /***************************************************************************
- *
- * MD5Final - MD5 finalization.
- *
- * Ends an MD5 message-digest operation by writing the message digest
- * and zeroizing the context.
- *
- * RETURNS: N/A
- */
- void MD5Final
- (
- UCHAR digest[16],
- MD5_CTX_T * context
- )
- {
- UCHAR bits[8];
- UINT index, padLen;
- UINT i, j;
- /* Save number of bits */
- for (i = 0, j = 0; j < 8; i++, j += 4)
- {
- bits[j] = (UCHAR)(context->count[i] & 0xff);
- bits[j+1] = (UCHAR)((context->count[i] >> 8) & 0xff);
- bits[j+2] = (UCHAR)((context->count[i] >> 16) & 0xff);
- bits[j+3] = (UCHAR)((context->count[i] >> 24) & 0xff);
- }
- /* Pad out to 56 mod 64 */
- index = (UINT)((context->count[0] >> 3) & 0x3f);
- padLen = (index < 56) ? (56 - index) : (120 - index);
- MD5Update(context, PADDING, padLen);
- /* Append length (before padding) */
- MD5Update(context, bits, 8);
- /*
- * Store the state as the digest. The digest begins with the
- * low-order byte of the first register and ends with the high-order
- * byte of the last register.
- */
- for (i = 0, j = 0; j < 16; i++, j += 4)
- {
- digest[j] = (UCHAR)(context->state[i] & 0xff);
- digest[j+1] = (UCHAR)((context->state[i] >> 8) & 0xff);
- digest[j+2] = (UCHAR)((context->state[i] >> 16) & 0xff);
- digest[j+3] = (UCHAR)((context->state[i] >> 24) & 0xff);
- }
- /* Zeroize sensitive information */
- memset((UCHAR *)context, 0, sizeof(*context));
- }
- #if MD5_TEST
- #include <stdio.h>
- LOCAL void MD5String
- (
- char * pString,
- char * pResult
- )
- {
- MD5_CTX_T context;
- UCHAR digest[16];
- UCHAR strDigest[32 + 1];
- UCHAR * pTemp;
- UINT len = strlen(pString);
- int i;
- MD5Init(&context);
- MD5Update(&context, pString, len);
- MD5Final(digest, &context);
- for (pTemp = strDigest, i = 0; i < 16; i++)
- pTemp += sprintf(pTemp, "%02x", digest[i]);
- fprintf(stderr, "MD5("%s")n--> %s", pString, strDigest);
- if (strcmp(strDigest, pResult) != 0) fprintf(stderr, " FAILEDn");
- else fprintf(stderr, " PASSEDn");
- }
- void MD5Test
- (
- void
- )
- {
- printf("n");
- MD5String("", "d41d8cd98f00b204e9800998ecf8427e");
- MD5String("a", "0cc175b9c0f1b6a831c399e269772661");
- MD5String("abc", "900150983cd24fb0d6963f7d28e17f72");
- MD5String("message digest", "f96b697d7cb7938d525a2f31aaf161d0");
- MD5String("abcdefghijklmnopqrstuvwxyz", "c3fcd3d76192e4007dfb496cca67e13b");
- MD5String("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789", "d174ab98d277d9f5a5611c2c9f419d9f");
- MD5String("12345678901234567890123456789012345678901234567890123456789012345678901234567890", "57edf4a22be3c955ac49da2e2107b67a");
- printf("n");
- }
- #endif /* MD5_TEST */
- #endif /* RIP_MD5 */