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308 lines
8.3 KiB
C
308 lines
8.3 KiB
C
#define LTC_SOURCE
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/* LibTomCrypt, modular cryptographic library -- Tom St Denis
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*
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* LibTomCrypt is a library that provides various cryptographic
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* algorithms in a highly modular and flexible manner.
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*
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* The library is free for all purposes without any express
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* guarantee it works.
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*/
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#include "tomcrypt.h"
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/**
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@param md4.c
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Submitted by Dobes Vandermeer (dobes@smartt.com)
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*/
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#ifdef LTC_MD4
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const struct ltc_hash_descriptor md4_desc =
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{
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"md4",
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6,
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16,
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64,
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/* OID */
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{ 1, 2, 840, 113549, 2, 4, },
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6,
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&md4_init,
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&md4_process,
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&md4_done,
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&md4_test,
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NULL
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};
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#define S11 3
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#define S12 7
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#define S13 11
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#define S14 19
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#define S21 3
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#define S22 5
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#define S23 9
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#define S24 13
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#define S31 3
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#define S32 9
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#define S33 11
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#define S34 15
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/* F, G and H are basic LTC_MD4 functions. */
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#define F(x, y, z) (z ^ (x & (y ^ z)))
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#define G(x, y, z) ((x & y) | (z & (x | y)))
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#define H(x, y, z) ((x) ^ (y) ^ (z))
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/* ROTATE_LEFT rotates x left n bits. */
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#define ROTATE_LEFT(x, n) ROLc(x, n)
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/* FF, GG and HH are transformations for rounds 1, 2 and 3 */
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/* Rotation is separate from addition to prevent recomputation */
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#define FF(a, b, c, d, x, s) { \
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(a) += F ((b), (c), (d)) + (x); \
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(a) = ROTATE_LEFT ((a), (s)); \
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}
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#define GG(a, b, c, d, x, s) { \
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(a) += G ((b), (c), (d)) + (x) + 0x5a827999UL; \
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(a) = ROTATE_LEFT ((a), (s)); \
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}
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#define HH(a, b, c, d, x, s) { \
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(a) += H ((b), (c), (d)) + (x) + 0x6ed9eba1UL; \
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(a) = ROTATE_LEFT ((a), (s)); \
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}
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#ifdef LTC_CLEAN_STACK
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static int _md4_compress(hash_state *md, unsigned char *buf)
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#else
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static int md4_compress(hash_state *md, unsigned char *buf)
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#endif
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{
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ulong32 x[16], a, b, c, d;
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int i;
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/* copy state */
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a = md->md4.state[0];
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b = md->md4.state[1];
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c = md->md4.state[2];
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d = md->md4.state[3];
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/* copy the state into 512-bits into W[0..15] */
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for (i = 0; i < 16; i++) {
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LOAD32L(x[i], buf + (4*i));
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}
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/* Round 1 */
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FF (a, b, c, d, x[ 0], S11); /* 1 */
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FF (d, a, b, c, x[ 1], S12); /* 2 */
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FF (c, d, a, b, x[ 2], S13); /* 3 */
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FF (b, c, d, a, x[ 3], S14); /* 4 */
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FF (a, b, c, d, x[ 4], S11); /* 5 */
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FF (d, a, b, c, x[ 5], S12); /* 6 */
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FF (c, d, a, b, x[ 6], S13); /* 7 */
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FF (b, c, d, a, x[ 7], S14); /* 8 */
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FF (a, b, c, d, x[ 8], S11); /* 9 */
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FF (d, a, b, c, x[ 9], S12); /* 10 */
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FF (c, d, a, b, x[10], S13); /* 11 */
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FF (b, c, d, a, x[11], S14); /* 12 */
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FF (a, b, c, d, x[12], S11); /* 13 */
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FF (d, a, b, c, x[13], S12); /* 14 */
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FF (c, d, a, b, x[14], S13); /* 15 */
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FF (b, c, d, a, x[15], S14); /* 16 */
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/* Round 2 */
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GG (a, b, c, d, x[ 0], S21); /* 17 */
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GG (d, a, b, c, x[ 4], S22); /* 18 */
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GG (c, d, a, b, x[ 8], S23); /* 19 */
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GG (b, c, d, a, x[12], S24); /* 20 */
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GG (a, b, c, d, x[ 1], S21); /* 21 */
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GG (d, a, b, c, x[ 5], S22); /* 22 */
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GG (c, d, a, b, x[ 9], S23); /* 23 */
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GG (b, c, d, a, x[13], S24); /* 24 */
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GG (a, b, c, d, x[ 2], S21); /* 25 */
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GG (d, a, b, c, x[ 6], S22); /* 26 */
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GG (c, d, a, b, x[10], S23); /* 27 */
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GG (b, c, d, a, x[14], S24); /* 28 */
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GG (a, b, c, d, x[ 3], S21); /* 29 */
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GG (d, a, b, c, x[ 7], S22); /* 30 */
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GG (c, d, a, b, x[11], S23); /* 31 */
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GG (b, c, d, a, x[15], S24); /* 32 */
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/* Round 3 */
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HH (a, b, c, d, x[ 0], S31); /* 33 */
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HH (d, a, b, c, x[ 8], S32); /* 34 */
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HH (c, d, a, b, x[ 4], S33); /* 35 */
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HH (b, c, d, a, x[12], S34); /* 36 */
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HH (a, b, c, d, x[ 2], S31); /* 37 */
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HH (d, a, b, c, x[10], S32); /* 38 */
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HH (c, d, a, b, x[ 6], S33); /* 39 */
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HH (b, c, d, a, x[14], S34); /* 40 */
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HH (a, b, c, d, x[ 1], S31); /* 41 */
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HH (d, a, b, c, x[ 9], S32); /* 42 */
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HH (c, d, a, b, x[ 5], S33); /* 43 */
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HH (b, c, d, a, x[13], S34); /* 44 */
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HH (a, b, c, d, x[ 3], S31); /* 45 */
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HH (d, a, b, c, x[11], S32); /* 46 */
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HH (c, d, a, b, x[ 7], S33); /* 47 */
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HH (b, c, d, a, x[15], S34); /* 48 */
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/* Update our state */
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md->md4.state[0] = md->md4.state[0] + a;
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md->md4.state[1] = md->md4.state[1] + b;
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md->md4.state[2] = md->md4.state[2] + c;
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md->md4.state[3] = md->md4.state[3] + d;
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return CRYPT_OK;
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}
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#ifdef LTC_CLEAN_STACK
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static int md4_compress(hash_state *md, unsigned char *buf)
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{
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int err;
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err = _md4_compress(md, buf);
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burn_stack(sizeof(ulong32) * 20 + sizeof(int));
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return err;
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}
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#endif
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/**
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Initialize the hash state
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@param md The hash state you wish to initialize
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@return CRYPT_OK if successful
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*/
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int md4_init(hash_state * md)
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{
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LTC_ARGCHK(md != NULL);
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md->md4.state[0] = 0x67452301UL;
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md->md4.state[1] = 0xefcdab89UL;
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md->md4.state[2] = 0x98badcfeUL;
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md->md4.state[3] = 0x10325476UL;
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md->md4.length = 0;
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md->md4.curlen = 0;
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return CRYPT_OK;
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}
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/**
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Process a block of memory though the hash
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@param md The hash state
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@param in The data to hash
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@param inlen The length of the data (octets)
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@return CRYPT_OK if successful
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*/
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HASH_PROCESS(md4_process, md4_compress, md4, 64)
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/**
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Terminate the hash to get the digest
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@param md The hash state
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@param out [out] The destination of the hash (16 bytes)
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@return CRYPT_OK if successful
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*/
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int md4_done(hash_state * md, unsigned char *out)
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{
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int i;
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LTC_ARGCHK(md != NULL);
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LTC_ARGCHK(out != NULL);
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if (md->md4.curlen >= sizeof(md->md4.buf)) {
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return CRYPT_INVALID_ARG;
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}
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/* increase the length of the message */
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md->md4.length += md->md4.curlen * 8;
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/* append the '1' bit */
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md->md4.buf[md->md4.curlen++] = (unsigned char)0x80;
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/* if the length is currently above 56 bytes we append zeros
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* then compress. Then we can fall back to padding zeros and length
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* encoding like normal.
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*/
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if (md->md4.curlen > 56) {
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while (md->md4.curlen < 64) {
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md->md4.buf[md->md4.curlen++] = (unsigned char)0;
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}
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md4_compress(md, md->md4.buf);
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md->md4.curlen = 0;
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}
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/* pad upto 56 bytes of zeroes */
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while (md->md4.curlen < 56) {
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md->md4.buf[md->md4.curlen++] = (unsigned char)0;
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}
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/* store length */
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STORE64L(md->md4.length, md->md4.buf+56);
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md4_compress(md, md->md4.buf);
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/* copy output */
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for (i = 0; i < 4; i++) {
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STORE32L(md->md4.state[i], out+(4*i));
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}
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#ifdef LTC_CLEAN_STACK
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zeromem(md, sizeof(hash_state));
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#endif
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return CRYPT_OK;
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}
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/**
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Self-test the hash
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@return CRYPT_OK if successful, CRYPT_NOP if self-tests have been disabled
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*/
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int md4_test(void)
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{
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#ifndef LTC_TEST
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return CRYPT_NOP;
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#else
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static const struct md4_test_case {
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const char *input;
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unsigned char hash[16];
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} tests[] = {
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{ "",
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{0x31, 0xd6, 0xcf, 0xe0, 0xd1, 0x6a, 0xe9, 0x31,
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0xb7, 0x3c, 0x59, 0xd7, 0xe0, 0xc0, 0x89, 0xc0} },
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{ "a",
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{0xbd, 0xe5, 0x2c, 0xb3, 0x1d, 0xe3, 0x3e, 0x46,
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0x24, 0x5e, 0x05, 0xfb, 0xdb, 0xd6, 0xfb, 0x24} },
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{ "abc",
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{0xa4, 0x48, 0x01, 0x7a, 0xaf, 0x21, 0xd8, 0x52,
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0x5f, 0xc1, 0x0a, 0xe8, 0x7a, 0xa6, 0x72, 0x9d} },
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{ "message digest",
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{0xd9, 0x13, 0x0a, 0x81, 0x64, 0x54, 0x9f, 0xe8,
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0x18, 0x87, 0x48, 0x06, 0xe1, 0xc7, 0x01, 0x4b} },
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{ "abcdefghijklmnopqrstuvwxyz",
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{0xd7, 0x9e, 0x1c, 0x30, 0x8a, 0xa5, 0xbb, 0xcd,
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0xee, 0xa8, 0xed, 0x63, 0xdf, 0x41, 0x2d, 0xa9} },
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{ "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789",
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{0x04, 0x3f, 0x85, 0x82, 0xf2, 0x41, 0xdb, 0x35,
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0x1c, 0xe6, 0x27, 0xe1, 0x53, 0xe7, 0xf0, 0xe4} },
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{ "12345678901234567890123456789012345678901234567890123456789012345678901234567890",
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{0xe3, 0x3b, 0x4d, 0xdc, 0x9c, 0x38, 0xf2, 0x19,
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0x9c, 0x3e, 0x7b, 0x16, 0x4f, 0xcc, 0x05, 0x36} },
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};
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int i;
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unsigned char tmp[16];
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hash_state md;
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for(i = 0; i < (int)(sizeof(tests) / sizeof(tests[0])); i++) {
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md4_init(&md);
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md4_process(&md, (unsigned char *)tests[i].input, (unsigned long)strlen(tests[i].input));
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md4_done(&md, tmp);
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if (compare_testvector(tmp, sizeof(tmp), tests[i].hash, sizeof(tests[i].hash), "MD4", i)) {
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return CRYPT_FAIL_TESTVECTOR;
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}
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}
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return CRYPT_OK;
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#endif
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}
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#endif
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/* ref: $Format:%D$ */
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/* git commit: $Format:%H$ */
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/* commit time: $Format:%ai$ */
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