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53 lines
1.4 KiB
C
53 lines
1.4 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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#include "tomcrypt.h"
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/**
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@file crypt_register_hash.c
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Register a HASH, Tom St Denis
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*/
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/**
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Register a hash with the descriptor table
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@param hash The hash you wish to register
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@return value >= 0 if successfully added (or already present), -1 if unsuccessful
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*/
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int register_hash(const struct ltc_hash_descriptor *hash)
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{
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int x;
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LTC_ARGCHK(hash != NULL);
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/* is it already registered? */
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LTC_MUTEX_LOCK(<c_hash_mutex);
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for (x = 0; x < TAB_SIZE; x++) {
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if (XMEMCMP(&hash_descriptor[x], hash, sizeof(struct ltc_hash_descriptor)) == 0) {
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LTC_MUTEX_UNLOCK(<c_hash_mutex);
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return x;
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}
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}
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/* find a blank spot */
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for (x = 0; x < TAB_SIZE; x++) {
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if (hash_descriptor[x].name == NULL) {
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XMEMCPY(&hash_descriptor[x], hash, sizeof(struct ltc_hash_descriptor));
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LTC_MUTEX_UNLOCK(<c_hash_mutex);
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return x;
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}
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}
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/* no spot */
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LTC_MUTEX_UNLOCK(<c_hash_mutex);
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return -1;
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}
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/* ref: HEAD -> master, tag: v1.18.2 */
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/* git commit: 7e7eb695d581782f04b24dc444cbfde86af59853 */
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/* commit time: 2018-07-01 22:49:01 +0200 */
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