X-Git-Url: https://git.openssl.org/gitweb/?a=blobdiff_plain;f=crypto%2Fmodes%2Fofb128.c;h=96b15c712c398393d2f73e896ef26eb97054c35b;hb=e3b35d2b29e9446af83fcaa534e67e7b04a60d7a;hp=01c01702c4f963175ef7db7a4096df29787067c9;hpb=d749e1080a4ec0ae6af5edc4851379fbc2a5ebca;p=openssl.git diff --git a/crypto/modes/ofb128.c b/crypto/modes/ofb128.c index 01c01702c4..96b15c712c 100644 --- a/crypto/modes/ofb128.c +++ b/crypto/modes/ofb128.c @@ -1,121 +1,74 @@ -/* ==================================================================== - * Copyright (c) 2008 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 2008-2016 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 */ #include #include "modes_lcl.h" #include -#ifndef MODES_DEBUG -# ifndef NDEBUG -# define NDEBUG -# endif -#endif -#include - -/* 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; +/* + * 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 CRYPTO_ofb128_encrypt(const unsigned char *in, unsigned char *out, - size_t len, const void *key, - unsigned char ivec[16], int *num, - block128_f block) + size_t len, const void *key, + unsigned char ivec[16], int *num, block128_f block) { - unsigned int n; - size_t l=0; + unsigned int n; + size_t l = 0; - assert(in && out && key && ivec && num); - - n = *num; + n = *num; #if !defined(OPENSSL_SMALL_FOOTPRINT) - if (16%sizeof(size_t) == 0) do { /* always true actually */ - while (n && len) { - *(out++) = *(in++) ^ ivec[n]; - --len; - n = (n+1) % 16; - } -#if defined(STRICT_ALIGNMENT) - if (((size_t)in|(size_t)out|(size_t)ivec)%sizeof(size_t) != 0) - break; -#endif - while (len>=16) { - (*block)(ivec, ivec, key); - for (; n<16; n+=sizeof(size_t)) - *(size_t*)(out+n) = - *(size_t*)(in+n) ^ *(size_t*)(ivec+n); - len -= 16; - out += 16; - in += 16; - n = 0; - } - if (len) { - (*block)(ivec, ivec, key); - while (len--) { - out[n] = in[n] ^ ivec[n]; - ++n; - } - } - *num = n; - return; - } while(0); - /* the rest would be commonly eliminated by x86* compiler */ + if (16 % sizeof(size_t) == 0) { /* always true actually */ + do { + while (n && len) { + *(out++) = *(in++) ^ ivec[n]; + --len; + n = (n + 1) % 16; + } +# if defined(STRICT_ALIGNMENT) + if (((size_t)in | (size_t)out | (size_t)ivec) % sizeof(size_t) != + 0) + break; +# endif + while (len >= 16) { + (*block) (ivec, ivec, key); + for (; n < 16; n += sizeof(size_t)) + *(size_t *)(out + n) = + *(size_t *)(in + n) ^ *(size_t *)(ivec + n); + len -= 16; + out += 16; + in += 16; + n = 0; + } + if (len) { + (*block) (ivec, ivec, key); + while (len--) { + out[n] = in[n] ^ ivec[n]; + ++n; + } + } + *num = n; + return; + } while (0); + } + /* the rest would be commonly eliminated by x86* compiler */ #endif - while (l