X-Git-Url: https://pd.if.org/git/?a=blobdiff_plain;f=libtomcrypt%2Fsrc%2Fmisc%2Fcrypt%2Fcrypt_register_prng.c;fp=libtomcrypt%2Fsrc%2Fmisc%2Fcrypt%2Fcrypt_register_prng.c;h=9cbd634d2f0f86b04f4104655eadf4e4f9eaf227;hb=66bc25938679f1d6a1d1200f329093d82a5e99b4;hp=0000000000000000000000000000000000000000;hpb=a52ee0733f420ca20224049260d6fc5cf7d8f621;p=zpackage

diff --git a/libtomcrypt/src/misc/crypt/crypt_register_prng.c b/libtomcrypt/src/misc/crypt/crypt_register_prng.c
new file mode 100644
index 0000000..9cbd634
--- /dev/null
+++ b/libtomcrypt/src/misc/crypt/crypt_register_prng.c
@@ -0,0 +1,52 @@
+/* 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(&ltc_prng_mutex);
+   for (x = 0; x < TAB_SIZE; x++) {
+       if (XMEMCMP(&prng_descriptor[x], prng, sizeof(struct ltc_prng_descriptor)) == 0) {
+          LTC_MUTEX_UNLOCK(&ltc_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(&ltc_prng_mutex);
+          return x;
+       }
+   }
+
+   /* no spot */
+   LTC_MUTEX_UNLOCK(&ltc_prng_mutex);
+   return -1;
+}
+
+/* ref:         $Format:%D$ */
+/* git commit:  $Format:%H$ */
+/* commit time: $Format:%ai$ */