Mercurial > dropbear
view libtomcrypt/src/misc/pkcs5/pkcs_5_1.c @ 351:e66eec4dcba7 debug-unrandom
some more debugging output
author | Matt Johnston <matt@ucc.asn.au> |
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date | Tue, 08 Aug 2006 15:31:38 +0000 |
parents | 1b9e69c058d2 |
children | 0cbe8f6dbf9e |
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/* 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, [email protected], http://libtomcrypt.org */ #include <tomcrypt.h> /** @file pkcs_5_1.c PKCS #5, Algorithm #1, Tom St Denis */ #ifdef PKCS_5 /** Execute PKCS #5 v1 @param password The password (or key) @param password_len The length of the password (octet) @param salt The salt (or nonce) which is 8 octets long @param iteration_count The PKCS #5 v1 iteration count @param hash_idx The index of the hash desired @param out [out] The destination for this algorithm @param outlen [in/out] The max size and resulting size of the algorithm output @return CRYPT_OK if successful */ int pkcs_5_alg1(const unsigned char *password, unsigned long password_len, const unsigned char *salt, int iteration_count, int hash_idx, unsigned char *out, unsigned long *outlen) { int err; unsigned long x; hash_state *md; unsigned char *buf; LTC_ARGCHK(password != NULL); LTC_ARGCHK(salt != NULL); LTC_ARGCHK(out != NULL); LTC_ARGCHK(outlen != NULL); /* test hash IDX */ if ((err = hash_is_valid(hash_idx)) != CRYPT_OK) { return err; } /* allocate memory */ md = XMALLOC(sizeof(hash_state)); buf = XMALLOC(MAXBLOCKSIZE); if (md == NULL || buf == NULL) { if (md != NULL) { XFREE(md); } if (buf != NULL) { XFREE(buf); } return CRYPT_MEM; } /* hash initial password + salt */ if ((err = hash_descriptor[hash_idx].init(md)) != CRYPT_OK) { goto LBL_ERR; } if ((err = hash_descriptor[hash_idx].process(md, password, password_len)) != CRYPT_OK) { goto LBL_ERR; } if ((err = hash_descriptor[hash_idx].process(md, salt, 8)) != CRYPT_OK) { goto LBL_ERR; } if ((err = hash_descriptor[hash_idx].done(md, buf)) != CRYPT_OK) { goto LBL_ERR; } while (--iteration_count) { /* code goes here. */ x = MAXBLOCKSIZE; if ((err = hash_memory(hash_idx, buf, hash_descriptor[hash_idx].hashsize, buf, &x)) != CRYPT_OK) { goto LBL_ERR; } } /* copy upto outlen bytes */ for (x = 0; x < hash_descriptor[hash_idx].hashsize && x < *outlen; x++) { out[x] = buf[x]; } *outlen = x; err = CRYPT_OK; LBL_ERR: #ifdef LTC_CLEAN_STACK zeromem(buf, MAXBLOCKSIZE); zeromem(md, sizeof(hash_state)); #endif XFREE(buf); XFREE(md); return err; } #endif /* $Source: /cvs/libtom/libtomcrypt/src/misc/pkcs5/pkcs_5_1.c,v $ */ /* $Revision: 1.4 $ */ /* $Date: 2005/05/05 14:35:59 $ */