X-Git-Url: https://pd.if.org/git/?a=blobdiff_plain;f=libtomcrypt%2Fsrc%2Fmisc%2Fcrypt%2Fcrypt_cipher_is_valid.c;fp=libtomcrypt%2Fsrc%2Fmisc%2Fcrypt%2Fcrypt_cipher_is_valid.c;h=aebc94cc53dd702880070088dc7fcfd6d94cf4a8;hb=66bc25938679f1d6a1d1200f329093d82a5e99b4;hp=0000000000000000000000000000000000000000;hpb=a52ee0733f420ca20224049260d6fc5cf7d8f621;p=zpackage

diff --git a/libtomcrypt/src/misc/crypt/crypt_cipher_is_valid.c b/libtomcrypt/src/misc/crypt/crypt_cipher_is_valid.c
new file mode 100644
index 0000000..aebc94c
--- /dev/null
+++ b/libtomcrypt/src/misc/crypt/crypt_cipher_is_valid.c
@@ -0,0 +1,34 @@
+/* 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(&ltc_cipher_mutex);
+   if (idx < 0 || idx >= TAB_SIZE || cipher_descriptor[idx].name == NULL) {
+      LTC_MUTEX_UNLOCK(&ltc_cipher_mutex);
+      return CRYPT_INVALID_CIPHER;
+   }
+   LTC_MUTEX_UNLOCK(&ltc_cipher_mutex);
+   return CRYPT_OK;
+}
+
+/* ref:         $Format:%D$ */
+/* git commit:  $Format:%H$ */
+/* commit time: $Format:%ai$ */