1 files changed, 45 insertions, 0 deletions
diff --git a/src/modes/ofb/ofb_getiv.c b/src/modes/ofb/ofb_getiv.c
new file mode 100644
index 0000000..f945fff
--- /dev/null
+++ b/src/modes/ofb/ofb_getiv.c
@@ -0,0 +1,45 @@
+/* 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.org
+ */
+#include "tomcrypt.h"
+
+/**
+   @file ofb_getiv.c
+   OFB implementation, get IV, Tom St Denis
+*/
+
+#ifdef OFB
+
+/**
+   Get the current initial vector
+   @param IV   [out] The destination of the initial vector
+   @param len  [in/out]  The max size and resulting size of the initial vector
+   @param ofb  The OFB state
+   @return CRYPT_OK if successful
+*/
+int ofb_getiv(unsigned char *IV, unsigned long *len, symmetric_OFB *ofb)
+{
+   LTC_ARGCHK(IV  != NULL);
+   LTC_ARGCHK(len != NULL);
+   LTC_ARGCHK(ofb != NULL);
+   if ((unsigned long)ofb->blocklen > *len) {
+      return CRYPT_BUFFER_OVERFLOW;
+   }
+   XMEMCPY(IV, ofb->IV, ofb->blocklen);
+   *len = ofb->blocklen;
+
+   return CRYPT_OK;
+}
+
+#endif
+
+/* $Source: /cvs/libtom/libtomcrypt/src/modes/ofb/ofb_getiv.c,v $ */
+/* $Revision: 1.3 $ */
+/* $Date: 2005/05/05 14:35:59 $ */