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54 lines
1.4 KiB
54 lines
1.4 KiB
#define LTC_SOURCE
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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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#include "tomcrypt.h"
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/**
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@file crypt_register_prng.c
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Register a PRNG, Tom St Denis
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*/
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/**
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Register a PRNG with the descriptor table
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@param prng The PRNG 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_prng(const struct ltc_prng_descriptor *prng)
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{
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int x;
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LTC_ARGCHK(prng != NULL);
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/* is it already registered? */
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LTC_MUTEX_LOCK(<c_prng_mutex);
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for (x = 0; x < TAB_SIZE; x++) {
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if (XMEMCMP(&prng_descriptor[x], prng, sizeof(struct ltc_prng_descriptor)) == 0) {
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LTC_MUTEX_UNLOCK(<c_prng_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 (prng_descriptor[x].name == NULL) {
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XMEMCPY(&prng_descriptor[x], prng, sizeof(struct ltc_prng_descriptor));
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LTC_MUTEX_UNLOCK(<c_prng_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_prng_mutex);
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return -1;
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}
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/* ref: $Format:%D$ */
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/* git commit: $Format:%H$ */
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/* commit time: $Format:%ai$ */
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