version 0.3.33

[fms.git] / libs / libtomcrypt / misc / crypt / crypt_unregister_prng.c

diff --git a/libs/libtomcrypt/misc/crypt/crypt_unregister_prng.c b/libs/libtomcrypt/misc/crypt/crypt_unregister_prng.c
new file mode 100644 (file)
index 0000000..694cbcf
--- /dev/null
+++ b/libs/libtomcrypt/misc/crypt/crypt_unregister_prng.c
@@ -0,0 +1,44 @@
+/* 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.
+ *
+ * Tom St Denis, tomstdenis@gmail.com, http://libtomcrypt.com
+ */
+#include "tomcrypt.h"
+
+/**
+  @file crypt_unregister_prng.c
+  Unregister a PRNG, Tom St Denis
+*/
+
+/**
+  Unregister a PRNG from the descriptor table
+  @param prng   The PRNG descriptor to remove
+  @return CRYPT_OK on success
+*/
+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 (XMEMCMP(&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;
+}
+
+/* $Source: /cvs/libtom/libtomcrypt/src/misc/crypt/crypt_unregister_prng.c,v $ */
+/* $Revision: 1.6 $ */
+/* $Date: 2006/11/01 09:28:17 $ */