/* 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. * * Tom St Denis, tomstdenis@gmail.com, http://libtomcrypt.com *//**   @param sha224.c   SHA-224 new NIST standard based off of SHA-256 truncated to 224 bits (Tom St Denis)*/const struct ltc_hash_descriptor sha224_desc ={    "sha224",    10,    28,    64,    /* OID */   { 2, 16, 840, 1, 101, 3, 4, 2, 4,  },   9,    &sha224_init,    &sha256_process,    &sha224_done,    &sha224_test,    NULL};/* init the sha256 er... sha224 state ;-) *//**   Initialize the hash state   @param md   The hash state you wish to initialize   @return CRYPT_OK if successful*/int sha224_init(hash_state * md){    LTC_ARGCHK(md != NULL);    md->sha256.curlen = 0;    md->sha256.length = 0;    md->sha256.state[0] = 0xc1059ed8UL;    md->sha256.state[1] = 0x367cd507UL;    md->sha256.state[2] = 0x3070dd17UL;    md->sha256.state[3] = 0xf70e5939UL;    md->sha256.state[4] = 0xffc00b31UL;    md->sha256.state[5] = 0x68581511UL;    md->sha256.state[6] = 0x64f98fa7UL;    md->sha256.state[7] = 0xbefa4fa4UL;    return CRYPT_OK;}/**   Terminate the hash to get the digest   @param md  The hash state   @param out [out] The destination of the hash (28 bytes)   @return CRYPT_OK if successful*/int sha224_done(hash_state * md, unsigned char *out){    unsigned char buf[32];    int err;    LTC_ARGCHK(md  != NULL);    LTC_ARGCHK(out != NULL);    err = sha256_done(md, buf);    XMEMCPY(out, buf, 28);#ifdef LTC_CLEAN_STACK    zeromem(buf, sizeof(buf));#endif     return err;}/**  Self-test the hash  @return CRYPT_OK if successful, CRYPT_NOP if self-tests have been disabled*/  int  sha224_test(void){ #ifndef LTC_TEST    return CRYPT_NOP; #else      static const struct {      char *msg;      unsigned char hash[28];  } tests[] = {    { "abc",      { 0x23, 0x09, 0x7d, 0x22, 0x34, 0x05, 0xd8,        0x22, 0x86, 0x42, 0xa4, 0x77, 0xbd, 0xa2,        0x55, 0xb3, 0x2a, 0xad, 0xbc, 0xe4, 0xbd,        0xa0, 0xb3, 0xf7, 0xe3, 0x6c, 0x9d, 0xa7 }    },    { "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq",      { 0x75, 0x38, 0x8b, 0x16, 0x51, 0x27, 0x76,        0xcc, 0x5d, 0xba, 0x5d, 0xa1, 0xfd, 0x89,        0x01, 0x50, 0xb0, 0xc6, 0x45, 0x5c, 0xb4,        0xf5, 0x8b, 0x19, 0x52, 0x52, 0x25, 0x25 }    },  };  int i;  unsigned char tmp[28];  hash_state md;  for (i = 0; i < (int)(sizeof(tests) / sizeof(tests[0])); i++) {      sha224_init(&md);      sha224_process(&md, (unsigned char*)tests[i].msg, (unsigned long)strlen(tests[i].msg));      sha224_done(&md, tmp);      if (XMEMCMP(tmp, tests[i].hash, 28) != 0) {         return CRYPT_FAIL_TESTVECTOR;      }  }  return CRYPT_OK; #endif}/* $Source: /cvs/libtom/libtomcrypt/src/hashes/sha2/sha224.c,v $ *//* $Revision: 1.8 $ *//* $Date: 2006/11/01 09:28:17 $ */