diff cfb_setiv.c @ 15:6362d3854bb4 libtomcrypt-orig

0.96 release of LibTomCrypt
author Matt Johnston <matt@ucc.asn.au>
date Tue, 15 Jun 2004 14:07:21 +0000
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/cfb_setiv.c	Tue Jun 15 14:07:21 2004 +0000
@@ -0,0 +1,39 @@
+/* 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, [email protected], http://libtomcrypt.org
+ */
+
+#include "mycrypt.h"
+
+#ifdef CFB
+
+int cfb_setiv(const unsigned char *IV, unsigned long len, symmetric_CFB *cfb)
+{
+   int err;
+   
+   _ARGCHK(IV  != NULL);
+   _ARGCHK(cfb != NULL);
+
+   if ((err = cipher_is_valid(cfb->cipher)) != CRYPT_OK) {
+       return err;
+   }
+   
+   if (len != (unsigned long)cfb->blocklen) {
+      return CRYPT_INVALID_ARG;
+   }
+      
+   /* force next block */
+   cfb->padlen = 0;
+   cipher_descriptor[cfb->cipher].ecb_encrypt(IV, cfb->IV, &cfb->key);
+
+   return CRYPT_OK;
+}
+
+#endif 
+