--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/modes/ofb/ofb_setiv.c	Fri May 06 13:23:02 2005 +0000
@@ -0,0 +1,49 @@
+/* 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 "tomcrypt.h"
+
+/**
+   @file ofb_setiv.c
+   OFB implementation, set IV, Tom St Denis
+*/
+
+#ifdef OFB
+
+/**
+   Set an initial vector
+   @param IV   The initial vector
+   @param len  The length of the vector (in octets)
+   @param ofb  The OFB state
+   @return CRYPT_OK if successful
+*/
+int ofb_setiv(const unsigned char *IV, unsigned long len, symmetric_OFB *ofb)
+{
+   int err;
+
+   LTC_ARGCHK(IV  != NULL);
+   LTC_ARGCHK(ofb != NULL);
+
+   if ((err = cipher_is_valid(ofb->cipher)) != CRYPT_OK) {
+       return err;
+   }
+
+   if (len != (unsigned long)ofb->blocklen) {
+      return CRYPT_INVALID_ARG;
+   }
+
+   /* force next block */
+   ofb->padlen = 0;
+   cipher_descriptor[ofb->cipher].ecb_encrypt(IV, ofb->IV, &ofb->key);
+   return CRYPT_OK;
+}
+
+#endif 
+