--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libtomcrypt/src/mac/f9/f9_process.c	Thu Feb 22 14:53:49 2007 +0000
@@ -0,0 +1,78 @@
+/* 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.com
+ */
+#include "tomcrypt.h"
+
+/**
+  @file f9_process.c
+  f9 Support, process blocks with f9
+*/
+
+#ifdef LTC_F9_MODE
+
+/** Process data through f9-MAC
+  @param f9       The f9-MAC state
+  @param in       Input data to process
+  @param inlen    Length of input in octets
+  Return CRYPT_OK on success
+*/
+int f9_process(f9_state *f9, const unsigned char *in, unsigned long inlen)
+{
+   int err, x;
+
+   LTC_ARGCHK(f9 != NULL);
+   LTC_ARGCHK(in   != NULL);
+
+   /* check structure */
+   if ((err = cipher_is_valid(f9->cipher)) != CRYPT_OK) {
+      return err;
+   }
+
+   if ((f9->blocksize > cipher_descriptor[f9->cipher].block_length) || (f9->blocksize < 0) ||
+       (f9->buflen > f9->blocksize) || (f9->buflen < 0)) {
+      return CRYPT_INVALID_ARG;
+   }
+
+#ifdef LTC_FAST
+   if (f9->buflen == 0) {
+       while (inlen >= (unsigned long)f9->blocksize) {
+           for (x = 0; x < f9->blocksize; x += sizeof(LTC_FAST_TYPE)) {
+              *((LTC_FAST_TYPE*)&(f9->IV[x])) ^= *((LTC_FAST_TYPE*)&(in[x]));
+           }
+           cipher_descriptor[f9->cipher].ecb_encrypt(f9->IV, f9->IV, &f9->key);
+           for (x = 0; x < f9->blocksize; x += sizeof(LTC_FAST_TYPE)) {
+              *((LTC_FAST_TYPE*)&(f9->ACC[x])) ^= *((LTC_FAST_TYPE*)&(f9->IV[x]));
+           }
+           in    += f9->blocksize;
+           inlen -= f9->blocksize;
+       }
+  }
+#endif
+
+   while (inlen) {
+     if (f9->buflen == f9->blocksize) {
+         cipher_descriptor[f9->cipher].ecb_encrypt(f9->IV, f9->IV, &f9->key);
+         for (x = 0; x < f9->blocksize; x++) {
+            f9->ACC[x] ^= f9->IV[x];
+         }
+         f9->buflen = 0;
+     }
+     f9->IV[f9->buflen++] ^= *in++;
+     --inlen;
+  }
+  return CRYPT_OK;       
+}
+
+#endif
+
+/* $Source: /cvs/libtom/libtomcrypt/src/mac/f9/f9_process.c,v $ */
+/* $Revision: 1.3 $ */
+/* $Date: 2006/12/16 17:41:21 $ */
+