From: John Carr Date: Thu, 26 Mar 1992 04:17:38 +0000 (+0000) Subject: Initial revision X-Git-Tag: krb5-1.0-beta2~191 X-Git-Url: http://git.tremily.us/?a=commitdiff_plain;h=913e4be784c5833689932ce57cc2e1d9ec9670f5;p=krb5.git Initial revision git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@2271 dc483132-0cff-0310-8789-dd5450dbe970 --- diff --git a/src/lib/crypto/md5/md5.c b/src/lib/crypto/md5/md5.c new file mode 100644 index 000000000..140a590b2 --- /dev/null +++ b/src/lib/crypto/md5/md5.c @@ -0,0 +1,290 @@ +/* + *********************************************************************** + ** md5.c -- the source code for MD5 routines ** + ** RSA Data Security, Inc. MD5 Message-Digest Algorithm ** + ** Created: 2/17/90 RLR ** + ** Revised: 1/91 SRD,AJ,BSK,JT Reference C ver., 7/10 constant corr. ** + *********************************************************************** + */ + +/* + *********************************************************************** + ** Copyright (C) 1990, RSA Data Security, Inc. 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. ** + *********************************************************************** + */ + +#include + +/* + *********************************************************************** + ** Message-digest routines: ** + ** To form the message digest for a message M ** + ** (1) Initialize a context buffer mdContext using MD5Init ** + ** (2) Call MD5Update on mdContext and M ** + ** (3) Call MD5Final on mdContext ** + ** The message digest is now in mdContext->digest[0...15] ** + *********************************************************************** + */ + +/* forward declaration */ +static void Transform (); + +static unsigned char PADDING[64] = { + 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 +}; + +/* F, G, H and I are basic MD5 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 */ +#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n)))) + +/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4 */ +/* Rotation is separate from addition to prevent recomputation */ +#define FF(a, b, c, d, x, s, ac) \ + {(a) += F ((b), (c), (d)) + (x) + (UINT4)(ac); \ + (a) = ROTATE_LEFT ((a), (s)); \ + (a) += (b); \ + } +#define GG(a, b, c, d, x, s, ac) \ + {(a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); \ + (a) = ROTATE_LEFT ((a), (s)); \ + (a) += (b); \ + } +#define HH(a, b, c, d, x, s, ac) \ + {(a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); \ + (a) = ROTATE_LEFT ((a), (s)); \ + (a) += (b); \ + } +#define II(a, b, c, d, x, s, ac) \ + {(a) += I ((b), (c), (d)) + (x) + (UINT4)(ac); \ + (a) = ROTATE_LEFT ((a), (s)); \ + (a) += (b); \ + } + +/* The routine MD5Init initializes the message-digest context + mdContext. All fields are set to zero. + */ +void MD5Init (mdContext) +MD5_CTX *mdContext; +{ + mdContext->i[0] = mdContext->i[1] = (UINT4)0; + + /* Load magic initialization constants. + */ + mdContext->buf[0] = (UINT4)0x67452301; + mdContext->buf[1] = (UINT4)0xefcdab89; + mdContext->buf[2] = (UINT4)0x98badcfe; + mdContext->buf[3] = (UINT4)0x10325476; +} + +/* The routine MD5Update updates the message-digest context to + account for the presence of each of the characters inBuf[0..inLen-1] + in the message whose digest is being computed. + */ +void MD5Update (mdContext, inBuf, inLen) +MD5_CTX *mdContext; +unsigned char *inBuf; +unsigned int inLen; +{ + UINT4 in[16]; + int mdi; + unsigned int i, ii; + + /* compute number of bytes mod 64 */ + mdi = (int)((mdContext->i[0] >> 3) & 0x3F); + + /* update number of bits */ + if ((mdContext->i[0] + ((UINT4)inLen << 3)) < mdContext->i[0]) + mdContext->i[1]++; + mdContext->i[0] += ((UINT4)inLen << 3); + mdContext->i[1] += ((UINT4)inLen >> 29); + + while (inLen--) { + /* add new character to buffer, increment mdi */ + mdContext->in[mdi++] = *inBuf++; + + /* transform if necessary */ + if (mdi == 0x40) { + for (i = 0, ii = 0; i < 16; i++, ii += 4) + in[i] = (((UINT4)mdContext->in[ii+3]) << 24) | + (((UINT4)mdContext->in[ii+2]) << 16) | + (((UINT4)mdContext->in[ii+1]) << 8) | + ((UINT4)mdContext->in[ii]); + Transform (mdContext->buf, in); + mdi = 0; + } + } +} + +/* The routine MD5Final terminates the message-digest computation and + ends with the desired message digest in mdContext->digest[0...15]. + */ +void MD5Final (mdContext) +MD5_CTX *mdContext; +{ + UINT4 in[16]; + int mdi; + unsigned int i, ii; + unsigned int padLen; + + /* save number of bits */ + in[14] = mdContext->i[0]; + in[15] = mdContext->i[1]; + + /* compute number of bytes mod 64 */ + mdi = (int)((mdContext->i[0] >> 3) & 0x3F); + + /* pad out to 56 mod 64 */ + padLen = (mdi < 56) ? (56 - mdi) : (120 - mdi); + MD5Update (mdContext, PADDING, padLen); + + /* append length in bits and transform */ + for (i = 0, ii = 0; i < 14; i++, ii += 4) + in[i] = (((UINT4)mdContext->in[ii+3]) << 24) | + (((UINT4)mdContext->in[ii+2]) << 16) | + (((UINT4)mdContext->in[ii+1]) << 8) | + ((UINT4)mdContext->in[ii]); + Transform (mdContext->buf, in); + + /* store buffer in digest */ + for (i = 0, ii = 0; i < 4; i++, ii += 4) { + mdContext->digest[ii] = (unsigned char)(mdContext->buf[i] & 0xFF); + mdContext->digest[ii+1] = + (unsigned char)((mdContext->buf[i] >> 8) & 0xFF); + mdContext->digest[ii+2] = + (unsigned char)((mdContext->buf[i] >> 16) & 0xFF); + mdContext->digest[ii+3] = + (unsigned char)((mdContext->buf[i] >> 24) & 0xFF); + } +} + +/* Basic MD5 step. Transforms buf based on in. + */ +static void Transform (buf, in) +UINT4 *buf; +UINT4 *in; +{ + UINT4 a = buf[0], b = buf[1], c = buf[2], d = buf[3]; + + /* Round 1 */ +#define S11 7 +#define S12 12 +#define S13 17 +#define S14 22 + FF ( a, b, c, d, in[ 0], S11, 3614090360L); /* 1 */ + FF ( d, a, b, c, in[ 1], S12, 3905402710L); /* 2 */ + FF ( c, d, a, b, in[ 2], S13, 606105819L); /* 3 */ + FF ( b, c, d, a, in[ 3], S14, 3250441966L); /* 4 */ + FF ( a, b, c, d, in[ 4], S11, 4118548399L); /* 5 */ + FF ( d, a, b, c, in[ 5], S12, 1200080426L); /* 6 */ + FF ( c, d, a, b, in[ 6], S13, 2821735955L); /* 7 */ + FF ( b, c, d, a, in[ 7], S14, 4249261313L); /* 8 */ + FF ( a, b, c, d, in[ 8], S11, 1770035416L); /* 9 */ + FF ( d, a, b, c, in[ 9], S12, 2336552879L); /* 10 */ + FF ( c, d, a, b, in[10], S13, 4294925233L); /* 11 */ + FF ( b, c, d, a, in[11], S14, 2304563134L); /* 12 */ + FF ( a, b, c, d, in[12], S11, 1804603682L); /* 13 */ + FF ( d, a, b, c, in[13], S12, 4254626195L); /* 14 */ + FF ( c, d, a, b, in[14], S13, 2792965006L); /* 15 */ + FF ( b, c, d, a, in[15], S14, 1236535329L); /* 16 */ + + /* Round 2 */ +#define S21 5 +#define S22 9 +#define S23 14 +#define S24 20 + GG ( a, b, c, d, in[ 1], S21, 4129170786L); /* 17 */ + GG ( d, a, b, c, in[ 6], S22, 3225465664L); /* 18 */ + GG ( c, d, a, b, in[11], S23, 643717713L); /* 19 */ + GG ( b, c, d, a, in[ 0], S24, 3921069994L); /* 20 */ + GG ( a, b, c, d, in[ 5], S21, 3593408605L); /* 21 */ + GG ( d, a, b, c, in[10], S22, 38016083L); /* 22 */ + GG ( c, d, a, b, in[15], S23, 3634488961L); /* 23 */ + GG ( b, c, d, a, in[ 4], S24, 3889429448L); /* 24 */ + GG ( a, b, c, d, in[ 9], S21, 568446438L); /* 25 */ + GG ( d, a, b, c, in[14], S22, 3275163606L); /* 26 */ + GG ( c, d, a, b, in[ 3], S23, 4107603335L); /* 27 */ + GG ( b, c, d, a, in[ 8], S24, 1163531501L); /* 28 */ + GG ( a, b, c, d, in[13], S21, 2850285829L); /* 29 */ + GG ( d, a, b, c, in[ 2], S22, 4243563512L); /* 30 */ + GG ( c, d, a, b, in[ 7], S23, 1735328473L); /* 31 */ + GG ( b, c, d, a, in[12], S24, 2368359562L); /* 32 */ + + /* Round 3 */ +#define S31 4 +#define S32 11 +#define S33 16 +#define S34 23 + HH ( a, b, c, d, in[ 5], S31, 4294588738L); /* 33 */ + HH ( d, a, b, c, in[ 8], S32, 2272392833L); /* 34 */ + HH ( c, d, a, b, in[11], S33, 1839030562L); /* 35 */ + HH ( b, c, d, a, in[14], S34, 4259657740L); /* 36 */ + HH ( a, b, c, d, in[ 1], S31, 2763975236L); /* 37 */ + HH ( d, a, b, c, in[ 4], S32, 1272893353L); /* 38 */ + HH ( c, d, a, b, in[ 7], S33, 4139469664L); /* 39 */ + HH ( b, c, d, a, in[10], S34, 3200236656L); /* 40 */ + HH ( a, b, c, d, in[13], S31, 681279174L); /* 41 */ + HH ( d, a, b, c, in[ 0], S32, 3936430074L); /* 42 */ + HH ( c, d, a, b, in[ 3], S33, 3572445317L); /* 43 */ + HH ( b, c, d, a, in[ 6], S34, 76029189L); /* 44 */ + HH ( a, b, c, d, in[ 9], S31, 3654602809L); /* 45 */ + HH ( d, a, b, c, in[12], S32, 3873151461L); /* 46 */ + HH ( c, d, a, b, in[15], S33, 530742520L); /* 47 */ + HH ( b, c, d, a, in[ 2], S34, 3299628645L); /* 48 */ + + /* Round 4 */ +#define S41 6 +#define S42 10 +#define S43 15 +#define S44 21 + II ( a, b, c, d, in[ 0], S41, 4096336452L); /* 49 */ + II ( d, a, b, c, in[ 7], S42, 1126891415L); /* 50 */ + II ( c, d, a, b, in[14], S43, 2878612391L); /* 51 */ + II ( b, c, d, a, in[ 5], S44, 4237533241L); /* 52 */ + II ( a, b, c, d, in[12], S41, 1700485571L); /* 53 */ + II ( d, a, b, c, in[ 3], S42, 2399980690L); /* 54 */ + II ( c, d, a, b, in[10], S43, 4293915773L); /* 55 */ + II ( b, c, d, a, in[ 1], S44, 2240044497L); /* 56 */ + II ( a, b, c, d, in[ 8], S41, 1873313359L); /* 57 */ + II ( d, a, b, c, in[15], S42, 4264355552L); /* 58 */ + II ( c, d, a, b, in[ 6], S43, 2734768916L); /* 59 */ + II ( b, c, d, a, in[13], S44, 1309151649L); /* 60 */ + II ( a, b, c, d, in[ 4], S41, 4149444226L); /* 61 */ + II ( d, a, b, c, in[11], S42, 3174756917L); /* 62 */ + II ( c, d, a, b, in[ 2], S43, 718787259L); /* 63 */ + II ( b, c, d, a, in[ 9], S44, 3951481745L); /* 64 */ + + buf[0] += a; + buf[1] += b; + buf[2] += c; + buf[3] += d; +}