| /* 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@iahu.ca, http://libtomcrypt.org |
| */ |
| /* Submited by Dobes Vandermeer (dobes@smartt.com) */ |
| |
| #include "mycrypt.h" |
| |
| #ifdef HMAC |
| |
| int hmac_memory(int hash, const unsigned char *key, unsigned long keylen, |
| const unsigned char *data, unsigned long len, |
| unsigned char *dst, unsigned long *dstlen) |
| { |
| hmac_state *hmac; |
| int err; |
| |
| _ARGCHK(key != NULL); |
| _ARGCHK(data != NULL); |
| _ARGCHK(dst != NULL); |
| _ARGCHK(dstlen != NULL); |
| |
| /* allocate ram for hmac state */ |
| hmac = XMALLOC(sizeof(hmac_state)); |
| if (hmac == NULL) { |
| return CRYPT_MEM; |
| } |
| |
| if ((err = hmac_init(hmac, hash, key, keylen)) != CRYPT_OK) { |
| goto __ERR; |
| } |
| |
| if ((err = hmac_process(hmac, data, len)) != CRYPT_OK) { |
| goto __ERR; |
| } |
| |
| if ((err = hmac_done(hmac, dst, dstlen)) != CRYPT_OK) { |
| goto __ERR; |
| } |
| |
| err = CRYPT_OK; |
| __ERR: |
| #ifdef CLEAN_STACK |
| zeromem(hmac, sizeof(hmac_state)); |
| #endif |
| |
| XFREE(hmac); |
| return err; |
| } |
| |
| #endif |
| |