1 files changed, 113 insertions, 0 deletions
diff --git a/core/lib/libtomcrypt/src/mac/omac/omac_done.c b/core/lib/libtomcrypt/src/mac/omac/omac_done.c
new file mode 100644
index 0000000..3bb62a2
--- /dev/null
+++ b/core/lib/libtomcrypt/src/mac/omac/omac_done.c
@@ -0,0 +1,113 @@
+/*
+ * Copyright (c) 2001-2007, Tom St Denis
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/* 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://libtom.org
+ */
+#include "tomcrypt.h"
+
+/** 
+  @file omac_done.c
+  LTC_OMAC1 support, terminate a stream, Tom St Denis
+*/
+
+#ifdef LTC_OMAC
+
+/**
+  Terminate an LTC_OMAC stream
+  @param omac   The LTC_OMAC state
+  @param out    [out] Destination for the authentication tag
+  @param outlen [in/out]  The max size and resulting size of the authentication tag
+  @return CRYPT_OK if successful
+*/
+int omac_done(omac_state *omac, unsigned char *out, unsigned long *outlen)
+{
+   int       err, mode;
+   unsigned  x;
+
+   LTC_ARGCHK(omac   != NULL);
+   LTC_ARGCHK(out    != NULL);
+   LTC_ARGCHK(outlen != NULL);
+   if ((err = cipher_is_valid(omac->cipher_idx)) != CRYPT_OK) {
+      return err;
+   }
+
+   if ((omac->buflen > (int)sizeof(omac->block)) || (omac->buflen < 0) ||
+       (omac->blklen > (int)sizeof(omac->block)) || (omac->buflen > omac->blklen)) {
+      return CRYPT_INVALID_ARG;
+   }
+
+   /* figure out mode */
+   if (omac->buflen != omac->blklen) {
+      /* add the 0x80 byte */
+      omac->block[omac->buflen++] = 0x80;
+
+      /* pad with 0x00 */
+      while (omac->buflen < omac->blklen) {
+         omac->block[omac->buflen++] = 0x00;
+      }
+      mode = 1;
+   } else {
+      mode = 0;
+   }
+
+   /* now xor prev + Lu[mode] */
+   for (x = 0; x < (unsigned)omac->blklen; x++) {
+       omac->block[x] ^= omac->prev[x] ^ omac->Lu[mode][x];
+   }
+
+   /* encrypt it */
+   if ((err = cipher_descriptor[omac->cipher_idx]->ecb_encrypt(omac->block, omac->block, &omac->key)) != CRYPT_OK) {
+      return err;
+   }
+   cipher_descriptor[omac->cipher_idx]->done(&omac->key);
+ 
+   /* output it */
+   for (x = 0; x < (unsigned)omac->blklen && x < *outlen; x++) {
+       out[x] = omac->block[x];
+   }
+   *outlen = x;
+
+#ifdef LTC_CLEAN_STACK
+   zeromem(omac, sizeof(*omac));
+#endif
+   return CRYPT_OK;
+}
+
+#endif
+
+
+/* $Source: /cvs/libtom/libtomcrypt/src/mac/omac/omac_done.c,v $ */
+/* $Revision: 1.9 $ */
+/* $Date: 2007/05/12 14:37:41 $ */