70 lines
1.7 KiB
C
70 lines
1.7 KiB
C
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/* 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@gmail.com, http://libtom.org
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*/
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#include "tomcrypt.h"
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/**
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@file hash_memory.c
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Hash memory helper, Tom St Denis
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*/
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/**
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Hash a block of memory and store the digest.
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@param hash The index of the hash you wish to use
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@param in The data you wish to hash
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@param inlen The length of the data to hash (octets)
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@param out [out] Where to store the digest
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@param outlen [in/out] Max size and resulting size of the digest
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@return CRYPT_OK if successful
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*/
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int hash_memory(int hash, const unsigned char *in, unsigned long inlen, unsigned char *out, unsigned long *outlen)
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{
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hash_state *md;
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int err;
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LTC_ARGCHK(in != NULL);
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LTC_ARGCHK(out != NULL);
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LTC_ARGCHK(outlen != NULL);
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if ((err = hash_is_valid(hash)) != CRYPT_OK) {
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return err;
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}
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if (*outlen < hash_descriptor[hash].hashsize) {
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*outlen = hash_descriptor[hash].hashsize;
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return CRYPT_BUFFER_OVERFLOW;
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}
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md = XMALLOC(sizeof(hash_state));
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if (md == NULL) {
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return CRYPT_MEM;
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}
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if ((err = hash_descriptor[hash].init(md)) != CRYPT_OK) {
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goto LBL_ERR;
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}
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if ((err = hash_descriptor[hash].process(md, in, inlen)) != CRYPT_OK) {
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goto LBL_ERR;
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}
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err = hash_descriptor[hash].done(md, out);
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*outlen = hash_descriptor[hash].hashsize;
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LBL_ERR:
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#ifdef LTC_CLEAN_STACK
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zeromem(md, sizeof(hash_state));
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#endif
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XFREE(md);
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return err;
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}
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/* $Source$ */
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/* $Revision$ */
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/* $Date$ */
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