-/* crypto/aes/aes_ofb.c -*- mode:C; c-file-style: "eay" -*- */
-/* ====================================================================
- * Copyright (c) 2002-2006 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 2002-2016 The OpenSSL Project Authors. All Rights Reserved.
*
+ * Licensed under the Apache License 2.0 (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 AES_DEBUG
-# ifndef NDEBUG
-# define NDEBUG
-# endif
-#endif
-#include <assert.h>
-
#include <openssl/aes.h>
-#include "aes_locl.h"
+#include <openssl/modes.h>
-#define STRICT_ALIGNMENT
-#if defined(__i386) || defined(__i386__) || \
- defined(__x86_64) || defined(__x86_64__) || \
- defined(_M_IX86) || defined(_M_AMD64) || defined(_M_X64)
-# undef STRICT_ALIGNMENT
-#endif
-
-/* The input and output encrypted as though 128bit ofb mode is being
- * used. The extra state information to record how much of the
- * 128bit block we have used is contained in *num;
- */
void AES_ofb128_encrypt(const unsigned char *in, unsigned char *out,
- unsigned long length, const AES_KEY *key,
- unsigned char *ivec, int *num) {
-
- unsigned int n;
- unsigned long l=0;
-
- assert(in && out && key && ivec && num);
-
- n = *num;
-
-#if !defined(OPENSSL_SMALL_FOOTPRINT)
- if (AES_BLOCK_SIZE%sizeof(size_t) == 0) do { /* always true actually */
- if (n) {
- while (length) {
- *(out++) = ivec[n] ^ *(in++);
- length--;
- if(!(n = (n + 1) % AES_BLOCK_SIZE))
- break;
- }
- }
-#if defined(STRICT_ALIGNMENT)
- if (((size_t)in|(size_t)out|(size_t)ivec)%sizeof(size_t) != 0)
- break;
-#endif
- while ((l + AES_BLOCK_SIZE) <= length) {
- unsigned int i;
- AES_encrypt(ivec, ivec, key);
- for (i=0;i<AES_BLOCK_SIZE;i+=sizeof(size_t)) {
- *(size_t*)(out+l+i) =
- *(size_t*)(ivec+i) ^ *(size_t*)(in+l+i);
- }
- l += AES_BLOCK_SIZE;
- }
-
- if (l < length) {
- AES_encrypt(ivec, ivec, key);
- do { out[l] = ivec[n] ^ in[l];
- l++; n++;
- } while (l < length);
- }
- *num = n;
- return;
- } while(0);
-#endif
-
- /* this code would be commonly eliminated by x86* compiler */
- while (l<length) {
- if (n == 0) {
- AES_encrypt(ivec, ivec, key);
- }
- out[l] = ivec[n] ^ in[l];
- l++;
- n = (n+1) % AES_BLOCK_SIZE;
- }
-
- *num=n;
+ size_t length, const AES_KEY *key,
+ unsigned char *ivec, int *num)
+{
+ CRYPTO_ofb128_encrypt(in, out, length, key, ivec, num,
+ (block128_f) AES_encrypt);
}
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