X-Git-Url: https://pd.if.org/git/?a=blobdiff_plain;ds=sidebyside;f=libtomcrypt%2Fsrc%2Fhashes%2Fmd4.c;fp=libtomcrypt%2Fsrc%2Fhashes%2Fmd4.c;h=09b6e31fcbff0462b12be34b5a359fb3ea81301f;hb=66bc25938679f1d6a1d1200f329093d82a5e99b4;hp=0000000000000000000000000000000000000000;hpb=a52ee0733f420ca20224049260d6fc5cf7d8f621;p=zpackage diff --git a/libtomcrypt/src/hashes/md4.c b/libtomcrypt/src/hashes/md4.c new file mode 100644 index 0000000..09b6e31 --- /dev/null +++ b/libtomcrypt/src/hashes/md4.c @@ -0,0 +1,306 @@ +/* LibTomCrypt, modular cryptographic library -- Tom St Denis + * + * LibTomCrypt is a library that provides various cryptographic + * algorithms in a highly modular and flexible manner. + * + * The library is free for all purposes without any express + * guarantee it works. + */ +#include "tomcrypt.h" + +/** + @param md4.c + Submitted by Dobes Vandermeer (dobes@smartt.com) +*/ + +#ifdef LTC_MD4 + +const struct ltc_hash_descriptor md4_desc = +{ + "md4", + 6, + 16, + 64, + + /* OID */ + { 1, 2, 840, 113549, 2, 4, }, + 6, + + &md4_init, + &md4_process, + &md4_done, + &md4_test, + NULL +}; + +#define S11 3 +#define S12 7 +#define S13 11 +#define S14 19 +#define S21 3 +#define S22 5 +#define S23 9 +#define S24 13 +#define S31 3 +#define S32 9 +#define S33 11 +#define S34 15 + +/* F, G and H are basic LTC_MD4 functions. */ +#define F(x, y, z) (z ^ (x & (y ^ z))) +#define G(x, y, z) ((x & y) | (z & (x | y))) +#define H(x, y, z) ((x) ^ (y) ^ (z)) + +/* ROTATE_LEFT rotates x left n bits. */ +#define ROTATE_LEFT(x, n) ROLc(x, n) + +/* FF, GG and HH are transformations for rounds 1, 2 and 3 */ +/* Rotation is separate from addition to prevent recomputation */ + +#define FF(a, b, c, d, x, s) { \ + (a) += F ((b), (c), (d)) + (x); \ + (a) = ROTATE_LEFT ((a), (s)); \ + } +#define GG(a, b, c, d, x, s) { \ + (a) += G ((b), (c), (d)) + (x) + 0x5a827999UL; \ + (a) = ROTATE_LEFT ((a), (s)); \ + } +#define HH(a, b, c, d, x, s) { \ + (a) += H ((b), (c), (d)) + (x) + 0x6ed9eba1UL; \ + (a) = ROTATE_LEFT ((a), (s)); \ + } + +#ifdef LTC_CLEAN_STACK +static int _md4_compress(hash_state *md, unsigned char *buf) +#else +static int md4_compress(hash_state *md, unsigned char *buf) +#endif +{ + ulong32 x[16], a, b, c, d; + int i; + + /* copy state */ + a = md->md4.state[0]; + b = md->md4.state[1]; + c = md->md4.state[2]; + d = md->md4.state[3]; + + /* copy the state into 512-bits into W[0..15] */ + for (i = 0; i < 16; i++) { + LOAD32L(x[i], buf + (4*i)); + } + + /* Round 1 */ + FF (a, b, c, d, x[ 0], S11); /* 1 */ + FF (d, a, b, c, x[ 1], S12); /* 2 */ + FF (c, d, a, b, x[ 2], S13); /* 3 */ + FF (b, c, d, a, x[ 3], S14); /* 4 */ + FF (a, b, c, d, x[ 4], S11); /* 5 */ + FF (d, a, b, c, x[ 5], S12); /* 6 */ + FF (c, d, a, b, x[ 6], S13); /* 7 */ + FF (b, c, d, a, x[ 7], S14); /* 8 */ + FF (a, b, c, d, x[ 8], S11); /* 9 */ + FF (d, a, b, c, x[ 9], S12); /* 10 */ + FF (c, d, a, b, x[10], S13); /* 11 */ + FF (b, c, d, a, x[11], S14); /* 12 */ + FF (a, b, c, d, x[12], S11); /* 13 */ + FF (d, a, b, c, x[13], S12); /* 14 */ + FF (c, d, a, b, x[14], S13); /* 15 */ + FF (b, c, d, a, x[15], S14); /* 16 */ + + /* Round 2 */ + GG (a, b, c, d, x[ 0], S21); /* 17 */ + GG (d, a, b, c, x[ 4], S22); /* 18 */ + GG (c, d, a, b, x[ 8], S23); /* 19 */ + GG (b, c, d, a, x[12], S24); /* 20 */ + GG (a, b, c, d, x[ 1], S21); /* 21 */ + GG (d, a, b, c, x[ 5], S22); /* 22 */ + GG (c, d, a, b, x[ 9], S23); /* 23 */ + GG (b, c, d, a, x[13], S24); /* 24 */ + GG (a, b, c, d, x[ 2], S21); /* 25 */ + GG (d, a, b, c, x[ 6], S22); /* 26 */ + GG (c, d, a, b, x[10], S23); /* 27 */ + GG (b, c, d, a, x[14], S24); /* 28 */ + GG (a, b, c, d, x[ 3], S21); /* 29 */ + GG (d, a, b, c, x[ 7], S22); /* 30 */ + GG (c, d, a, b, x[11], S23); /* 31 */ + GG (b, c, d, a, x[15], S24); /* 32 */ + + /* Round 3 */ + HH (a, b, c, d, x[ 0], S31); /* 33 */ + HH (d, a, b, c, x[ 8], S32); /* 34 */ + HH (c, d, a, b, x[ 4], S33); /* 35 */ + HH (b, c, d, a, x[12], S34); /* 36 */ + HH (a, b, c, d, x[ 2], S31); /* 37 */ + HH (d, a, b, c, x[10], S32); /* 38 */ + HH (c, d, a, b, x[ 6], S33); /* 39 */ + HH (b, c, d, a, x[14], S34); /* 40 */ + HH (a, b, c, d, x[ 1], S31); /* 41 */ + HH (d, a, b, c, x[ 9], S32); /* 42 */ + HH (c, d, a, b, x[ 5], S33); /* 43 */ + HH (b, c, d, a, x[13], S34); /* 44 */ + HH (a, b, c, d, x[ 3], S31); /* 45 */ + HH (d, a, b, c, x[11], S32); /* 46 */ + HH (c, d, a, b, x[ 7], S33); /* 47 */ + HH (b, c, d, a, x[15], S34); /* 48 */ + + + /* Update our state */ + md->md4.state[0] = md->md4.state[0] + a; + md->md4.state[1] = md->md4.state[1] + b; + md->md4.state[2] = md->md4.state[2] + c; + md->md4.state[3] = md->md4.state[3] + d; + + return CRYPT_OK; +} + +#ifdef LTC_CLEAN_STACK +static int md4_compress(hash_state *md, unsigned char *buf) +{ + int err; + err = _md4_compress(md, buf); + burn_stack(sizeof(ulong32) * 20 + sizeof(int)); + return err; +} +#endif + +/** + Initialize the hash state + @param md The hash state you wish to initialize + @return CRYPT_OK if successful +*/ +int md4_init(hash_state * md) +{ + LTC_ARGCHK(md != NULL); + md->md4.state[0] = 0x67452301UL; + md->md4.state[1] = 0xefcdab89UL; + md->md4.state[2] = 0x98badcfeUL; + md->md4.state[3] = 0x10325476UL; + md->md4.length = 0; + md->md4.curlen = 0; + return CRYPT_OK; +} + +/** + Process a block of memory though the hash + @param md The hash state + @param in The data to hash + @param inlen The length of the data (octets) + @return CRYPT_OK if successful +*/ +HASH_PROCESS(md4_process, md4_compress, md4, 64) + +/** + Terminate the hash to get the digest + @param md The hash state + @param out [out] The destination of the hash (16 bytes) + @return CRYPT_OK if successful +*/ +int md4_done(hash_state * md, unsigned char *out) +{ + int i; + + LTC_ARGCHK(md != NULL); + LTC_ARGCHK(out != NULL); + + if (md->md4.curlen >= sizeof(md->md4.buf)) { + return CRYPT_INVALID_ARG; + } + + /* increase the length of the message */ + md->md4.length += md->md4.curlen * 8; + + /* append the '1' bit */ + md->md4.buf[md->md4.curlen++] = (unsigned char)0x80; + + /* if the length is currently above 56 bytes we append zeros + * then compress. Then we can fall back to padding zeros and length + * encoding like normal. + */ + if (md->md4.curlen > 56) { + while (md->md4.curlen < 64) { + md->md4.buf[md->md4.curlen++] = (unsigned char)0; + } + md4_compress(md, md->md4.buf); + md->md4.curlen = 0; + } + + /* pad upto 56 bytes of zeroes */ + while (md->md4.curlen < 56) { + md->md4.buf[md->md4.curlen++] = (unsigned char)0; + } + + /* store length */ + STORE64L(md->md4.length, md->md4.buf+56); + md4_compress(md, md->md4.buf); + + /* copy output */ + for (i = 0; i < 4; i++) { + STORE32L(md->md4.state[i], out+(4*i)); + } +#ifdef LTC_CLEAN_STACK + zeromem(md, sizeof(hash_state)); +#endif + return CRYPT_OK; +} + +/** + Self-test the hash + @return CRYPT_OK if successful, CRYPT_NOP if self-tests have been disabled +*/ +int md4_test(void) +{ + #ifndef LTC_TEST + return CRYPT_NOP; + #else + static const struct md4_test_case { + const char *input; + unsigned char hash[16]; + } tests[] = { + { "", + {0x31, 0xd6, 0xcf, 0xe0, 0xd1, 0x6a, 0xe9, 0x31, + 0xb7, 0x3c, 0x59, 0xd7, 0xe0, 0xc0, 0x89, 0xc0} }, + { "a", + {0xbd, 0xe5, 0x2c, 0xb3, 0x1d, 0xe3, 0x3e, 0x46, + 0x24, 0x5e, 0x05, 0xfb, 0xdb, 0xd6, 0xfb, 0x24} }, + { "abc", + {0xa4, 0x48, 0x01, 0x7a, 0xaf, 0x21, 0xd8, 0x52, + 0x5f, 0xc1, 0x0a, 0xe8, 0x7a, 0xa6, 0x72, 0x9d} }, + { "message digest", + {0xd9, 0x13, 0x0a, 0x81, 0x64, 0x54, 0x9f, 0xe8, + 0x18, 0x87, 0x48, 0x06, 0xe1, 0xc7, 0x01, 0x4b} }, + { "abcdefghijklmnopqrstuvwxyz", + {0xd7, 0x9e, 0x1c, 0x30, 0x8a, 0xa5, 0xbb, 0xcd, + 0xee, 0xa8, 0xed, 0x63, 0xdf, 0x41, 0x2d, 0xa9} }, + { "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789", + {0x04, 0x3f, 0x85, 0x82, 0xf2, 0x41, 0xdb, 0x35, + 0x1c, 0xe6, 0x27, 0xe1, 0x53, 0xe7, 0xf0, 0xe4} }, + { "12345678901234567890123456789012345678901234567890123456789012345678901234567890", + {0xe3, 0x3b, 0x4d, 0xdc, 0x9c, 0x38, 0xf2, 0x19, + 0x9c, 0x3e, 0x7b, 0x16, 0x4f, 0xcc, 0x05, 0x36} }, + }; + + int i; + unsigned char tmp[16]; + hash_state md; + + for(i = 0; i < (int)(sizeof(tests) / sizeof(tests[0])); i++) { + md4_init(&md); + md4_process(&md, (unsigned char *)tests[i].input, (unsigned long)strlen(tests[i].input)); + md4_done(&md, tmp); + if (compare_testvector(tmp, sizeof(tmp), tests[i].hash, sizeof(tests[i].hash), "MD4", i)) { + return CRYPT_FAIL_TESTVECTOR; + } + + } + return CRYPT_OK; + #endif +} + +#endif + + + +/* ref: $Format:%D$ */ +/* git commit: $Format:%H$ */ +/* commit time: $Format:%ai$ */