X-Git-Url: https://git.openssl.org/gitweb/?p=openssl.git;a=blobdiff_plain;f=crypto%2Fdes%2Fcfb64enc.c;h=96de51b055ec4cd9d19fb07ebc95d2f13a25d85d;hp=5ec8683e402b5fafe9118b828a4ebc73d8750fde;hb=a9da48157c90b4b6d19d912666ad2183b5a16a1f;hpb=c2e4f17c1a0d4d5115c6ede9492de1615fe392ac diff --git a/crypto/des/cfb64enc.c b/crypto/des/cfb64enc.c index 5ec8683e40..96de51b055 100644 --- a/crypto/des/cfb64enc.c +++ b/crypto/des/cfb64enc.c @@ -1,121 +1,73 @@ -/* crypto/des/cfb64enc.c */ -/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) - * All rights reserved. +/* + * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved. * - * This package is an SSL implementation written - * by Eric Young (eay@cryptsoft.com). - * The implementation was written so as to conform with Netscapes SSL. - * - * This library is free for commercial and non-commercial use as long as - * the following conditions are aheared to. The following conditions - * apply to all code found in this distribution, be it the RC4, RSA, - * lhash, DES, etc., code; not just the SSL code. The SSL documentation - * included with this distribution is covered by the same copyright terms - * except that the holder is Tim Hudson (tjh@cryptsoft.com). - * - * Copyright remains Eric Young's, and as such any Copyright notices in - * the code are not to be removed. - * If this package is used in a product, Eric Young should be given attribution - * as the author of the parts of the library used. - * This can be in the form of a textual message at program startup or - * in documentation (online or textual) provided with the package. - * - * 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 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 acknowledgement: - * "This product includes cryptographic software written by - * Eric Young (eay@cryptsoft.com)" - * The word 'cryptographic' can be left out if the rouines from the library - * being used are not cryptographic related :-). - * 4. If you include any Windows specific code (or a derivative thereof) from - * the apps directory (application code) you must include an acknowledgement: - * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" - * - * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``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 AUTHOR 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. - * - * The licence and distribution terms for any publically available version or - * derivative of this code cannot be changed. i.e. this code cannot simply be - * copied and put under another distribution licence - * [including the GNU Public Licence.] + * 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 */ #include "des_locl.h" -/* The input and output encrypted as though 64bit cfb mode is being - * used. The extra state information to record how much of the - * 64bit block we have used is contained in *num; +/* + * The input and output encrypted as though 64bit cfb mode is being used. + * The extra state information to record how much of the 64bit block we have + * used is contained in *num; */ void DES_cfb64_encrypt(const unsigned char *in, unsigned char *out, - long length, DES_key_schedule *schedule, - DES_cblock *ivec, int *num, int enc) - { - register DES_LONG v0,v1; - register long l=length; - register int n= *num; - DES_LONG ti[2]; - unsigned char *iv,c,cc; - - iv = &(*ivec)[0]; - if (enc) - { - while (l--) - { - if (n == 0) - { - c2l(iv,v0); ti[0]=v0; - c2l(iv,v1); ti[1]=v1; - DES_encrypt1(ti,schedule,DES_ENCRYPT); - iv = &(*ivec)[0]; - v0=ti[0]; l2c(v0,iv); - v0=ti[1]; l2c(v0,iv); - iv = &(*ivec)[0]; - } - c= *(in++)^iv[n]; - *(out++)=c; - iv[n]=c; - n=(n+1)&0x07; - } - } - else - { - while (l--) - { - if (n == 0) - { - c2l(iv,v0); ti[0]=v0; - c2l(iv,v1); ti[1]=v1; - DES_encrypt1(ti,schedule,DES_ENCRYPT); - iv = &(*ivec)[0]; - v0=ti[0]; l2c(v0,iv); - v0=ti[1]; l2c(v0,iv); - iv = &(*ivec)[0]; - } - cc= *(in++); - c=iv[n]; - iv[n]=cc; - *(out++)=c^cc; - n=(n+1)&0x07; - } - } - v0=v1=ti[0]=ti[1]=c=cc=0; - *num=n; - } + long length, DES_key_schedule *schedule, + DES_cblock *ivec, int *num, int enc) +{ + register DES_LONG v0, v1; + register long l = length; + register int n = *num; + DES_LONG ti[2]; + unsigned char *iv, c, cc; + iv = &(*ivec)[0]; + if (enc) { + while (l--) { + if (n == 0) { + c2l(iv, v0); + ti[0] = v0; + c2l(iv, v1); + ti[1] = v1; + DES_encrypt1(ti, schedule, DES_ENCRYPT); + iv = &(*ivec)[0]; + v0 = ti[0]; + l2c(v0, iv); + v0 = ti[1]; + l2c(v0, iv); + iv = &(*ivec)[0]; + } + c = *(in++) ^ iv[n]; + *(out++) = c; + iv[n] = c; + n = (n + 1) & 0x07; + } + } else { + while (l--) { + if (n == 0) { + c2l(iv, v0); + ti[0] = v0; + c2l(iv, v1); + ti[1] = v1; + DES_encrypt1(ti, schedule, DES_ENCRYPT); + iv = &(*ivec)[0]; + v0 = ti[0]; + l2c(v0, iv); + v0 = ti[1]; + l2c(v0, iv); + iv = &(*ivec)[0]; + } + cc = *(in++); + c = iv[n]; + iv[n] = cc; + *(out++) = c ^ cc; + n = (n + 1) & 0x07; + } + } + v0 = v1 = ti[0] = ti[1] = c = cc = 0; + *num = n; +}