--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ocb_encrypt_authenticate_memory.c	Mon May 31 18:25:41 2004 +0000
@@ -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.
+ *
+ * Tom St Denis, [email protected], http://libtomcrypt.org
+ */
+
+/* OCB Implementation by Tom St Denis */
+#include "mycrypt.h"
+
+#ifdef OCB_MODE
+
+int ocb_encrypt_authenticate_memory(int cipher,
+    const unsigned char *key,    unsigned long keylen,
+    const unsigned char *nonce,  
+    const unsigned char *pt,     unsigned long ptlen,
+          unsigned char *ct,
+          unsigned char *tag,    unsigned long *taglen)
+{
+   int err;
+   ocb_state ocb;
+
+   _ARGCHK(key    != NULL);
+   _ARGCHK(nonce  != NULL);
+   _ARGCHK(pt     != NULL);
+   _ARGCHK(ct     != NULL);
+   _ARGCHK(tag    != NULL);
+   _ARGCHK(taglen != NULL);
+
+   if ((err = ocb_init(&ocb, cipher, key, keylen, nonce)) != CRYPT_OK) {
+      return err;
+   }
+
+   while (ptlen > (unsigned long)ocb.block_len) {
+        if ((err = ocb_encrypt(&ocb, pt, ct)) != CRYPT_OK) {
+           return err;
+        }
+        ptlen   -= ocb.block_len;
+        pt      += ocb.block_len;
+        ct      += ocb.block_len;
+   }
+
+   return ocb_done_encrypt(&ocb, pt, ptlen, ct, tag, taglen);
+}
+
+#endif