-/* crypto/camellia/camellia_ctr.c -*- mode:C; c-file-style: "eay" -*- */
-/* ====================================================================
- * Copyright (c) 2006 The OpenSSL Project. 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.
- *
- * 3. All advertising materials mentioning features or use of this
- * software must display the following acknowledgment:
- * "This product includes software developed by the OpenSSL Project
- * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
- *
- * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
- * endorse or promote products derived from this software without
- * prior written permission. For written permission, please contact
- * openssl-core@openssl.org.
- *
- * 5. Products derived from this software may not be called "OpenSSL"
- * nor may "OpenSSL" appear in their names without prior written
- * permission of the OpenSSL Project.
- *
- * 6. Redistributions of any form whatsoever must retain the following
- * acknowledgment:
- * "This product includes software developed by the OpenSSL Project
- * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
- *
- * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
- * EXPRESSED 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 OpenSSL PROJECT OR
- * ITS 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.
- * ====================================================================
+/*
+ * Copyright 2006-2016 The OpenSSL Project Authors. All Rights Reserved.
*
+ * Licensed under the OpenSSL license (the "License"). You may not use
+ * this file except in compliance with the License. You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
*/
-#ifndef CAMELLIA_DEBUG
-# ifndef NDEBUG
-# define NDEBUG
-# endif
-#endif
-#include <assert.h>
-
#include <openssl/camellia.h>
-#include "cmll_locl.h"
-
-/* NOTE: the IV/counter CTR mode is big-endian. The rest of the Camellia code
- * is endian-neutral. */
-/* increment counter (128-bit int) by 1 */
-static void Camellia_ctr128_inc(unsigned char *counter)
- {
- unsigned long c;
-
- /* Grab bottom dword of counter and increment */
- c = GETU32(counter + 12);
- c++; c &= 0xFFFFFFFF;
- PUTU32(counter + 12, c);
-
- /* if no overflow, we're done */
- if (c)
- return;
-
- /* Grab 1st dword of counter and increment */
- c = GETU32(counter + 8);
- c++; c &= 0xFFFFFFFF;
- PUTU32(counter + 8, c);
+#include <openssl/modes.h>
- /* if no overflow, we're done */
- if (c)
- return;
-
- /* Grab 2nd dword of counter and increment */
- c = GETU32(counter + 4);
- c++; c &= 0xFFFFFFFF;
- PUTU32(counter + 4, c);
-
- /* if no overflow, we're done */
- if (c)
- return;
-
- /* Grab top dword of counter and increment */
- c = GETU32(counter + 0);
- c++; c &= 0xFFFFFFFF;
- PUTU32(counter + 0, c);
- }
-
-/* The input encrypted as though 128bit counter mode is being
- * used. The extra state information to record how much of the
- * 128bit block we have used is contained in *num, and the
- * encrypted counter is kept in ecount_buf. Both *num and
- * ecount_buf must be initialised with zeros before the first
- * call to Camellia_ctr128_encrypt().
- *
- * This algorithm assumes that the counter is in the x lower bits
- * of the IV (ivec), and that the application has full control over
- * overflow and the rest of the IV. This implementation takes NO
- * responsability for checking that the counter doesn't overflow
- * into the rest of the IV when incremented.
- */
void Camellia_ctr128_encrypt(const unsigned char *in, unsigned char *out,
- size_t length, const CAMELLIA_KEY *key,
- unsigned char ivec[CAMELLIA_BLOCK_SIZE],
- unsigned char ecount_buf[CAMELLIA_BLOCK_SIZE],
- unsigned int *num)
- {
-
- unsigned int n;
-
- assert(in && out && key && counter && num);
- assert(*num < CAMELLIA_BLOCK_SIZE);
-
- n = *num;
-
- while (length--)
- {
- if (n == 0)
- {
- Camellia_encrypt(ivec, ecount_buf, key);
- Camellia_ctr128_inc(ivec);
- }
- *(out++) = *(in++) ^ ecount_buf[n];
- n = (n+1) % CAMELLIA_BLOCK_SIZE;
- }
-
- *num=n;
- }
-
+ size_t length, const CAMELLIA_KEY *key,
+ unsigned char ivec[CAMELLIA_BLOCK_SIZE],
+ unsigned char ecount_buf[CAMELLIA_BLOCK_SIZE],
+ unsigned int *num)
+{
+
+ CRYPTO_ctr128_encrypt(in, out, length, key, ivec, ecount_buf, num,
+ (block128_f) Camellia_encrypt);
+}
projects / openssl.git / blobdiff