--- /dev/null
+/* LibTomCrypt, modular cryptographic library -- Tom St Denis
+ *
+ * LibTomCrypt is a library that provides various cryptographic
+ * algorithms in a highly modular and flexible manner.
+ *
+ * The library is free for all purposes without any express
+ * guarantee it works.
+ */
+#include "tomcrypt.h"
+
+/**
+ @file crypt_register_prng.c
+ Register a PRNG, Tom St Denis
+*/
+
+/**
+ Register a PRNG with the descriptor table
+ @param prng The PRNG you wish to register
+ @return value >= 0 if successfully added (or already present), -1 if unsuccessful
+*/
+int register_prng(const struct ltc_prng_descriptor *prng)
+{
+ int x;
+
+ LTC_ARGCHK(prng != NULL);
+
+ /* is it already registered? */
+ LTC_MUTEX_LOCK(<c_prng_mutex);
+ for (x = 0; x < TAB_SIZE; x++) {
+ if (XMEMCMP(&prng_descriptor[x], prng, sizeof(struct ltc_prng_descriptor)) == 0) {
+ LTC_MUTEX_UNLOCK(<c_prng_mutex);
+ return x;
+ }
+ }
+
+ /* find a blank spot */
+ for (x = 0; x < TAB_SIZE; x++) {
+ if (prng_descriptor[x].name == NULL) {
+ XMEMCPY(&prng_descriptor[x], prng, sizeof(struct ltc_prng_descriptor));
+ LTC_MUTEX_UNLOCK(<c_prng_mutex);
+ return x;
+ }
+ }
+
+ /* no spot */
+ LTC_MUTEX_UNLOCK(<c_prng_mutex);
+ return -1;
+}
+
+/* ref: $Format:%D$ */
+/* git commit: $Format:%H$ */
+/* commit time: $Format:%ai$ */