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Diffstat (limited to 'src/lib/crypto/builtin/md5/md5.c')
| -rw-r--r-- | src/lib/crypto/builtin/md5/md5.c | 343 |
1 files changed, 343 insertions, 0 deletions
diff --git a/src/lib/crypto/builtin/md5/md5.c b/src/lib/crypto/builtin/md5/md5.c new file mode 100644 index 000000000..e548dbc3a --- /dev/null +++ b/src/lib/crypto/builtin/md5/md5.c @@ -0,0 +1,343 @@ +/* + *********************************************************************** + ** 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. ** + *********************************************************************** + */ + +/* + * Modified by John Carr, MIT, to use Kerberos 5 typedefs. + */ + +/* + *********************************************************************** + ** 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 "k5-int.h" +#include "rsa-md5.h" + +/* + *********************************************************************** + ** Message-digest routines: ** + ** To form the message digest for a message M ** + ** (1) Initialize a context buffer mdContext using krb5_MD5Init ** + ** (2) Call krb5_MD5Update on mdContext and M ** + ** (3) Call krb5_MD5Final on mdContext ** + ** The message digest is now in mdContext->digest[0...15] ** + *********************************************************************** + */ + +/* forward declaration */ +static void Transform (krb5_ui_4 *buf, krb5_ui_4 *in); + +static const 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)) & 0xffffffff) | ((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) + (krb5_ui_4)(ac); \ + (a) &= 0xffffffff; \ + (a) = ROTATE_LEFT ((a), (s)); \ + (a) += (b); \ + (a) &= 0xffffffff; \ + } +#define GG(a, b, c, d, x, s, ac) \ + {(a) += G ((b), (c), (d)) + (x) + (krb5_ui_4)(ac); \ + (a) &= 0xffffffff; \ + (a) = ROTATE_LEFT ((a), (s)); \ + (a) += (b); \ + (a) &= 0xffffffff; \ + } +#define HH(a, b, c, d, x, s, ac) \ + {(a) += H ((b), (c), (d)) + (x) + (krb5_ui_4)(ac); \ + (a) &= 0xffffffff; \ + (a) = ROTATE_LEFT ((a), (s)); \ + (a) += (b); \ + (a) &= 0xffffffff; \ + } +#define II(a, b, c, d, x, s, ac) \ + {(a) += I ((b), (c), (d)) + (x) + (krb5_ui_4)(ac); \ + (a) &= 0xffffffff; \ + (a) = ROTATE_LEFT ((a), (s)); \ + (a) += (b); \ + (a) &= 0xffffffff; \ + } + +/* The routine krb5_MD5Init initializes the message-digest context + mdContext. All fields are set to zero. + */ +void +krb5_MD5Init (krb5_MD5_CTX *mdContext) +{ + mdContext->i[0] = mdContext->i[1] = (krb5_ui_4)0; + + /* Load magic initialization constants. + */ + mdContext->buf[0] = 0x67452301UL; + mdContext->buf[1] = 0xefcdab89UL; + mdContext->buf[2] = 0x98badcfeUL; + mdContext->buf[3] = 0x10325476UL; +} + +/* The routine krb5_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 +krb5_MD5Update (krb5_MD5_CTX *mdContext, const unsigned char *inBuf, unsigned int inLen) +{ + krb5_ui_4 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] + ((krb5_ui_4)inLen << 3)) < mdContext->i[0]) + mdContext->i[1]++; + mdContext->i[0] += ((krb5_ui_4)inLen << 3); + mdContext->i[1] += ((krb5_ui_4)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] = load_32_le(mdContext->in+ii); + Transform (mdContext->buf, in); + mdi = 0; + } + } +} + +/* The routine krb5_MD5Final terminates the message-digest computation and + ends with the desired message digest in mdContext->digest[0...15]. + */ +void +krb5_MD5Final (krb5_MD5_CTX *mdContext) +{ + krb5_ui_4 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); + krb5_MD5Update (mdContext, PADDING, padLen); + + /* append length in bits and transform */ + for (i = 0, ii = 0; i < 14; i++, ii += 4) + in[i] = load_32_le(mdContext->in+ii); + Transform (mdContext->buf, in); + + /* store buffer in digest */ + for (i = 0, ii = 0; i < 4; i++, ii += 4) { + store_32_le(mdContext->buf[i], mdContext->digest+ii); + } +} + +/* Basic MD5 step. Transforms buf based on in. + */ +static void Transform (krb5_ui_4 *buf, krb5_ui_4 *in) +{ + register krb5_ui_4 a = buf[0], b = buf[1], c = buf[2], d = buf[3]; + +#if defined(CONFIG_SMALL) && !defined(CONFIG_SMALL_NO_CRYPTO) + + int i; +#define ROTATE { krb5_ui_4 temp; temp = d, d = c, c = b, b = a, a = temp; } + for (i = 0; i < 16; i++) { + const unsigned char round1s[] = { 7, 12, 17, 22 }; + const krb5_ui_4 round1consts[] = { + 3614090360UL, 3905402710UL, 606105819UL, 3250441966UL, + 4118548399UL, 1200080426UL, 2821735955UL, 4249261313UL, + 1770035416UL, 2336552879UL, 4294925233UL, 2304563134UL, + 1804603682UL, 4254626195UL, 2792965006UL, 1236535329UL, + }; + FF (a, b, c, d, in[i], round1s[i%4], round1consts[i]); + ROTATE; + } + for (i = 0; i < 16; i++) { + const unsigned char round2s[] = { 5, 9, 14, 20 }; + const krb5_ui_4 round2consts[] = { + 4129170786UL, 3225465664UL, 643717713UL, 3921069994UL, + 3593408605UL, 38016083UL, 3634488961UL, 3889429448UL, + 568446438UL, 3275163606UL, 4107603335UL, 1163531501UL, + 2850285829UL, 4243563512UL, 1735328473UL, 2368359562UL, + }; + int r2index = (1 + i * 5) % 16; + GG (a, b, c, d, in[r2index], round2s[i%4], round2consts[i]); + ROTATE; + } + for (i = 0; i < 16; i++) { + static const unsigned char round3s[] = { 4, 11, 16, 23 }; + static const krb5_ui_4 round3consts[] = { + 4294588738UL, 2272392833UL, 1839030562UL, 4259657740UL, + 2763975236UL, 1272893353UL, 4139469664UL, 3200236656UL, + 681279174UL, 3936430074UL, 3572445317UL, 76029189UL, + 3654602809UL, 3873151461UL, 530742520UL, 3299628645UL, + }; + int r3index = (5 + i * 3) % 16; + HH (a, b, c, d, in[r3index], round3s[i%4], round3consts[i]); + ROTATE; + } + for (i = 0; i < 16; i++) { + static const unsigned char round4s[] = { 6, 10, 15, 21 }; + static const krb5_ui_4 round4consts[] = { + 4096336452UL, 1126891415UL, 2878612391UL, 4237533241UL, + 1700485571UL, 2399980690UL, 4293915773UL, 2240044497UL, + 1873313359UL, 4264355552UL, 2734768916UL, 1309151649UL, + 4149444226UL, 3174756917UL, 718787259UL, 3951481745UL, + }; + int r4index = (7 * i) % 16; + II (a, b, c, d, in[r4index], round4s[i%4], round4consts[i]); + ROTATE; + } + +#else + + /* Round 1 */ +#define S11 7 +#define S12 12 +#define S13 17 +#define S14 22 + FF ( a, b, c, d, in[ 0], S11, 3614090360UL); /* 1 */ + FF ( d, a, b, c, in[ 1], S12, 3905402710UL); /* 2 */ + FF ( c, d, a, b, in[ 2], S13, 606105819UL); /* 3 */ + FF ( b, c, d, a, in[ 3], S14, 3250441966UL); /* 4 */ + FF ( a, b, c, d, in[ 4], S11, 4118548399UL); /* 5 */ + FF ( d, a, b, c, in[ 5], S12, 1200080426UL); /* 6 */ + FF ( c, d, a, b, in[ 6], S13, 2821735955UL); /* 7 */ + FF ( b, c, d, a, in[ 7], S14, 4249261313UL); /* 8 */ + FF ( a, b, c, d, in[ 8], S11, 1770035416UL); /* 9 */ + FF ( d, a, b, c, in[ 9], S12, 2336552879UL); /* 10 */ + FF ( c, d, a, b, in[10], S13, 4294925233UL); /* 11 */ + FF ( b, c, d, a, in[11], S14, 2304563134UL); /* 12 */ + FF ( a, b, c, d, in[12], S11, 1804603682UL); /* 13 */ + FF ( d, a, b, c, in[13], S12, 4254626195UL); /* 14 */ + FF ( c, d, a, b, in[14], S13, 2792965006UL); /* 15 */ + FF ( b, c, d, a, in[15], S14, 1236535329UL); /* 16 */ + + /* Round 2 */ +#define S21 5 +#define S22 9 +#define S23 14 +#define S24 20 + GG ( a, b, c, d, in[ 1], S21, 4129170786UL); /* 17 */ + GG ( d, a, b, c, in[ 6], S22, 3225465664UL); /* 18 */ + GG ( c, d, a, b, in[11], S23, 643717713UL); /* 19 */ + GG ( b, c, d, a, in[ 0], S24, 3921069994UL); /* 20 */ + GG ( a, b, c, d, in[ 5], S21, 3593408605UL); /* 21 */ + GG ( d, a, b, c, in[10], S22, 38016083UL); /* 22 */ + GG ( c, d, a, b, in[15], S23, 3634488961UL); /* 23 */ + GG ( b, c, d, a, in[ 4], S24, 3889429448UL); /* 24 */ + GG ( a, b, c, d, in[ 9], S21, 568446438UL); /* 25 */ + GG ( d, a, b, c, in[14], S22, 3275163606UL); /* 26 */ + GG ( c, d, a, b, in[ 3], S23, 4107603335UL); /* 27 */ + GG ( b, c, d, a, in[ 8], S24, 1163531501UL); /* 28 */ + GG ( a, b, c, d, in[13], S21, 2850285829UL); /* 29 */ + GG ( d, a, b, c, in[ 2], S22, 4243563512UL); /* 30 */ + GG ( c, d, a, b, in[ 7], S23, 1735328473UL); /* 31 */ + GG ( b, c, d, a, in[12], S24, 2368359562UL); /* 32 */ + + /* Round 3 */ +#define S31 4 +#define S32 11 +#define S33 16 +#define S34 23 + HH ( a, b, c, d, in[ 5], S31, 4294588738UL); /* 33 */ + HH ( d, a, b, c, in[ 8], S32, 2272392833UL); /* 34 */ + HH ( c, d, a, b, in[11], S33, 1839030562UL); /* 35 */ + HH ( b, c, d, a, in[14], S34, 4259657740UL); /* 36 */ + HH ( a, b, c, d, in[ 1], S31, 2763975236UL); /* 37 */ + HH ( d, a, b, c, in[ 4], S32, 1272893353UL); /* 38 */ + HH ( c, d, a, b, in[ 7], S33, 4139469664UL); /* 39 */ + HH ( b, c, d, a, in[10], S34, 3200236656UL); /* 40 */ + HH ( a, b, c, d, in[13], S31, 681279174UL); /* 41 */ + HH ( d, a, b, c, in[ 0], S32, 3936430074UL); /* 42 */ + HH ( c, d, a, b, in[ 3], S33, 3572445317UL); /* 43 */ + HH ( b, c, d, a, in[ 6], S34, 76029189UL); /* 44 */ + HH ( a, b, c, d, in[ 9], S31, 3654602809UL); /* 45 */ + HH ( d, a, b, c, in[12], S32, 3873151461UL); /* 46 */ + HH ( c, d, a, b, in[15], S33, 530742520UL); /* 47 */ + HH ( b, c, d, a, in[ 2], S34, 3299628645UL); /* 48 */ + + /* Round 4 */ +#define S41 6 +#define S42 10 +#define S43 15 +#define S44 21 + II ( a, b, c, d, in[ 0], S41, 4096336452UL); /* 49 */ + II ( d, a, b, c, in[ 7], S42, 1126891415UL); /* 50 */ + II ( c, d, a, b, in[14], S43, 2878612391UL); /* 51 */ + II ( b, c, d, a, in[ 5], S44, 4237533241UL); /* 52 */ + II ( a, b, c, d, in[12], S41, 1700485571UL); /* 53 */ + II ( d, a, b, c, in[ 3], S42, 2399980690UL); /* 54 */ + II ( c, d, a, b, in[10], S43, 4293915773UL); /* 55 */ + II ( b, c, d, a, in[ 1], S44, 2240044497UL); /* 56 */ + II ( a, b, c, d, in[ 8], S41, 1873313359UL); /* 57 */ + II ( d, a, b, c, in[15], S42, 4264355552UL); /* 58 */ + II ( c, d, a, b, in[ 6], S43, 2734768916UL); /* 59 */ + II ( b, c, d, a, in[13], S44, 1309151649UL); /* 60 */ + II ( a, b, c, d, in[ 4], S41, 4149444226UL); /* 61 */ + II ( d, a, b, c, in[11], S42, 3174756917UL); /* 62 */ + II ( c, d, a, b, in[ 2], S43, 718787259UL); /* 63 */ + II ( b, c, d, a, in[ 9], S44, 3951481745UL); /* 64 */ + +#endif /* small? */ + + buf[0] += a; + buf[1] += b; + buf[2] += c; + buf[3] += d; +} |