+++ /dev/null
-/* 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 md2.c
- LTC_MD2 (RFC 1319) hash function implementation by Tom St Denis
-*/
-
-#ifdef LTC_MD2
-
-const struct ltc_hash_descriptor md2_desc =
-{
- "md2",
- 7,
- 16,
- 16,
-
- /* OID */
- { 1, 2, 840, 113549, 2, 2, },
- 6,
-
- &md2_init,
- &md2_process,
- &md2_done,
- &md2_test,
- NULL
-};
-
-static const unsigned char PI_SUBST[256] = {
- 41, 46, 67, 201, 162, 216, 124, 1, 61, 54, 84, 161, 236, 240, 6,
- 19, 98, 167, 5, 243, 192, 199, 115, 140, 152, 147, 43, 217, 188,
- 76, 130, 202, 30, 155, 87, 60, 253, 212, 224, 22, 103, 66, 111, 24,
- 138, 23, 229, 18, 190, 78, 196, 214, 218, 158, 222, 73, 160, 251,
- 245, 142, 187, 47, 238, 122, 169, 104, 121, 145, 21, 178, 7, 63,
- 148, 194, 16, 137, 11, 34, 95, 33, 128, 127, 93, 154, 90, 144, 50,
- 39, 53, 62, 204, 231, 191, 247, 151, 3, 255, 25, 48, 179, 72, 165,
- 181, 209, 215, 94, 146, 42, 172, 86, 170, 198, 79, 184, 56, 210,
- 150, 164, 125, 182, 118, 252, 107, 226, 156, 116, 4, 241, 69, 157,
- 112, 89, 100, 113, 135, 32, 134, 91, 207, 101, 230, 45, 168, 2, 27,
- 96, 37, 173, 174, 176, 185, 246, 28, 70, 97, 105, 52, 64, 126, 15,
- 85, 71, 163, 35, 221, 81, 175, 58, 195, 92, 249, 206, 186, 197,
- 234, 38, 44, 83, 13, 110, 133, 40, 132, 9, 211, 223, 205, 244, 65,
- 129, 77, 82, 106, 220, 55, 200, 108, 193, 171, 250, 36, 225, 123,
- 8, 12, 189, 177, 74, 120, 136, 149, 139, 227, 99, 232, 109, 233,
- 203, 213, 254, 59, 0, 29, 57, 242, 239, 183, 14, 102, 88, 208, 228,
- 166, 119, 114, 248, 235, 117, 75, 10, 49, 68, 80, 180, 143, 237,
- 31, 26, 219, 153, 141, 51, 159, 17, 131, 20
-};
-
-/* adds 16 bytes to the checksum */
-static void md2_update_chksum(hash_state *md)
-{
- int j;
- unsigned char L;
- L = md->md2.chksum[15];
- for (j = 0; j < 16; j++) {
-
-/* caution, the RFC says its "C[j] = S[M[i*16+j] xor L]" but the reference source code [and test vectors] say
- otherwise.
-*/
- L = (md->md2.chksum[j] ^= PI_SUBST[(int)(md->md2.buf[j] ^ L)] & 255);
- }
-}
-
-static void md2_compress(hash_state *md)
-{
- int j, k;
- unsigned char t;
-
- /* copy block */
- for (j = 0; j < 16; j++) {
- md->md2.X[16+j] = md->md2.buf[j];
- md->md2.X[32+j] = md->md2.X[j] ^ md->md2.X[16+j];
- }
-
- t = (unsigned char)0;
-
- /* do 18 rounds */
- for (j = 0; j < 18; j++) {
- for (k = 0; k < 48; k++) {
- t = (md->md2.X[k] ^= PI_SUBST[(int)(t & 255)]);
- }
- t = (t + (unsigned char)j) & 255;
- }
-}
-
-/**
- Initialize the hash state
- @param md The hash state you wish to initialize
- @return CRYPT_OK if successful
-*/
-int md2_init(hash_state *md)
-{
- LTC_ARGCHK(md != NULL);
-
- /* LTC_MD2 uses a zero'ed state... */
- zeromem(md->md2.X, sizeof(md->md2.X));
- zeromem(md->md2.chksum, sizeof(md->md2.chksum));
- zeromem(md->md2.buf, sizeof(md->md2.buf));
- md->md2.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
-*/
-int md2_process(hash_state *md, const unsigned char *in, unsigned long inlen)
-{
- unsigned long n;
- LTC_ARGCHK(md != NULL);
- LTC_ARGCHK(in != NULL);
- if (md-> md2 .curlen > sizeof(md-> md2 .buf)) {
- return CRYPT_INVALID_ARG;
- }
- while (inlen > 0) {
- n = MIN(inlen, (16 - md->md2.curlen));
- XMEMCPY(md->md2.buf + md->md2.curlen, in, (size_t)n);
- md->md2.curlen += n;
- in += n;
- inlen -= n;
-
- /* is 16 bytes full? */
- if (md->md2.curlen == 16) {
- md2_compress(md);
- md2_update_chksum(md);
- md->md2.curlen = 0;
- }
- }
- return CRYPT_OK;
-}
-
-/**
- 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 md2_done(hash_state * md, unsigned char *out)
-{
- unsigned long i, k;
-
- LTC_ARGCHK(md != NULL);
- LTC_ARGCHK(out != NULL);
-
- if (md->md2.curlen >= sizeof(md->md2.buf)) {
- return CRYPT_INVALID_ARG;
- }
-
-
- /* pad the message */
- k = 16 - md->md2.curlen;
- for (i = md->md2.curlen; i < 16; i++) {
- md->md2.buf[i] = (unsigned char)k;
- }
-
- /* hash and update */
- md2_compress(md);
- md2_update_chksum(md);
-
- /* hash checksum */
- XMEMCPY(md->md2.buf, md->md2.chksum, 16);
- md2_compress(md);
-
- /* output is lower 16 bytes of X */
- XMEMCPY(out, md->md2.X, 16);
-
-#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 md2_test(void)
-{
- #ifndef LTC_TEST
- return CRYPT_NOP;
- #else
- static const struct {
- const char *msg;
- unsigned char hash[16];
- } tests[] = {
- { "",
- {0x83,0x50,0xe5,0xa3,0xe2,0x4c,0x15,0x3d,
- 0xf2,0x27,0x5c,0x9f,0x80,0x69,0x27,0x73
- }
- },
- { "a",
- {0x32,0xec,0x01,0xec,0x4a,0x6d,0xac,0x72,
- 0xc0,0xab,0x96,0xfb,0x34,0xc0,0xb5,0xd1
- }
- },
- { "message digest",
- {0xab,0x4f,0x49,0x6b,0xfb,0x2a,0x53,0x0b,
- 0x21,0x9f,0xf3,0x30,0x31,0xfe,0x06,0xb0
- }
- },
- { "abcdefghijklmnopqrstuvwxyz",
- {0x4e,0x8d,0xdf,0xf3,0x65,0x02,0x92,0xab,
- 0x5a,0x41,0x08,0xc3,0xaa,0x47,0x94,0x0b
- }
- },
- { "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789",
- {0xda,0x33,0xde,0xf2,0xa4,0x2d,0xf1,0x39,
- 0x75,0x35,0x28,0x46,0xc3,0x03,0x38,0xcd
- }
- },
- { "12345678901234567890123456789012345678901234567890123456789012345678901234567890",
- {0xd5,0x97,0x6f,0x79,0xd8,0x3d,0x3a,0x0d,
- 0xc9,0x80,0x6c,0x3c,0x66,0xf3,0xef,0xd8
- }
- }
- };
-
- int i;
- unsigned char tmp[16];
- hash_state md;
-
- for (i = 0; i < (int)(sizeof(tests) / sizeof(tests[0])); i++) {
- md2_init(&md);
- md2_process(&md, (unsigned char*)tests[i].msg, (unsigned long)strlen(tests[i].msg));
- md2_done(&md, tmp);
- if (compare_testvector(tmp, sizeof(tmp), tests[i].hash, sizeof(tests[i].hash), "MD2", i)) {
- return CRYPT_FAIL_TESTVECTOR;
- }
- }
- return CRYPT_OK;
- #endif
-}
-
-#endif
-
-
-/* ref: $Format:%D$ */
-/* git commit: $Format:%H$ */
-/* commit time: $Format:%ai$ */
projects / zpackage / blobdiff