59 lines
1.3 KiB
C
59 lines
1.3 KiB
C
/* LibTomCrypt, modular cryptographic library -- Tom St Denis
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*
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* LibTomCrypt is a library that provides various cryptographic
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* algorithms in a highly modular and flexible manner.
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*
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* The library is free for all purposes without any express
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* guarantee it works.
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*
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* Tom St Denis, tomstdenis@iahu.ca, http://libtomcrypt.org
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*/
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/* Submited by Dobes Vandermeer (dobes@smartt.com) */
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#include "mycrypt.h"
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#ifdef HMAC
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int hmac_memory(int hash, const unsigned char *key, unsigned long keylen,
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const unsigned char *data, unsigned long len,
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unsigned char *dst, unsigned long *dstlen)
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{
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hmac_state *hmac;
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int err;
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_ARGCHK(key != NULL);
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_ARGCHK(data != NULL);
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_ARGCHK(dst != NULL);
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_ARGCHK(dstlen != NULL);
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/* allocate ram for hmac state */
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hmac = XMALLOC(sizeof(hmac_state));
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if (hmac == NULL) {
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return CRYPT_MEM;
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}
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if ((err = hmac_init(hmac, hash, key, keylen)) != CRYPT_OK) {
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goto __ERR;
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}
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if ((err = hmac_process(hmac, data, len)) != CRYPT_OK) {
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goto __ERR;
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}
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if ((err = hmac_done(hmac, dst, dstlen)) != CRYPT_OK) {
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goto __ERR;
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}
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err = CRYPT_OK;
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__ERR:
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#ifdef CLEAN_STACK
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zeromem(hmac, sizeof(hmac_state));
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#endif
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XFREE(hmac);
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return err;
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}
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#endif
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