added libtomcrypt-1.05

src/misc/crypt/crypt_unregister_prng.c

@@ -25,14 +25,17 @@ int unregister_prng(const struct ltc_prng_descriptor *prng)
    int x;
 
    LTC_ARGCHK(prng != NULL);
-
+ 
    /* is it already registered? */
+   LTC_MUTEX_LOCK(&ltc_prng_mutex);
    for (x = 0; x < TAB_SIZE; x++) {
        if (memcmp(&prng_descriptor[x], prng, sizeof(struct ltc_prng_descriptor)) != 0) {
           prng_descriptor[x].name = NULL;
+          LTC_MUTEX_UNLOCK(&ltc_prng_mutex);
           return CRYPT_OK;
        }
    }
+   LTC_MUTEX_UNLOCK(&ltc_prng_mutex);
    return CRYPT_ERROR;
 }