--- /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_cipher_is_valid.c
+ Determine if cipher is valid, Tom St Denis
+*/
+
+/*
+ Test if a cipher index is valid
+ @param idx The index of the cipher to search for
+ @return CRYPT_OK if valid
+*/
+int cipher_is_valid(int idx)
+{
+ LTC_MUTEX_LOCK(<c_cipher_mutex);
+ if (idx < 0 || idx >= TAB_SIZE || cipher_descriptor[idx].name == NULL) {
+ LTC_MUTEX_UNLOCK(<c_cipher_mutex);
+ return CRYPT_INVALID_CIPHER;
+ }
+ LTC_MUTEX_UNLOCK(<c_cipher_mutex);
+ return CRYPT_OK;
+}
+
+/* ref: $Format:%D$ */
+/* git commit: $Format:%H$ */
+/* commit time: $Format:%ai$ */