X-Git-Url: https://pd.if.org/git/?a=blobdiff_plain;f=libtomcrypt%2Fsrc%2Fmodes%2Fofb%2Fofb_setiv.c;fp=libtomcrypt%2Fsrc%2Fmodes%2Fofb%2Fofb_setiv.c;h=005dbc7adc9f93262ae4d37c7f654e242c402a51;hb=66bc25938679f1d6a1d1200f329093d82a5e99b4;hp=0000000000000000000000000000000000000000;hpb=a52ee0733f420ca20224049260d6fc5cf7d8f621;p=zpackage

diff --git a/libtomcrypt/src/modes/ofb/ofb_setiv.c b/libtomcrypt/src/modes/ofb/ofb_setiv.c
new file mode 100644
index 0000000..005dbc7
--- /dev/null
+++ b/libtomcrypt/src/modes/ofb/ofb_setiv.c
@@ -0,0 +1,50 @@
+/* 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 ofb_setiv.c
+   OFB implementation, set IV, Tom St Denis
+*/
+
+#ifdef LTC_OFB_MODE
+
+/**
+   Set an initialization vector
+   @param IV   The initialization 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;
+   return cipher_descriptor[ofb->cipher].ecb_encrypt(IV, ofb->IV, &ofb->key);
+}
+
+#endif
+
+
+/* ref:         $Format:%D$ */
+/* git commit:  $Format:%H$ */
+/* commit time: $Format:%ai$ */