X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=crypto%2Fdes%2Fcfb64ede.c;h=21943f6143ead9c3926a1aab1b3b33131a65e34b;hb=cd5e2b0a689a7b22bd470e70ed0b8c84305d6d03;hp=40da95888c25e1ce87cb6c6a1a18cc7558781be2;hpb=d749e1080a4ec0ae6af5edc4851379fbc2a5ebca;p=oweals%2Fopenssl.git diff --git a/crypto/des/cfb64ede.c b/crypto/des/cfb64ede.c index 40da95888c..21943f6143 100644 --- a/crypto/des/cfb64ede.c +++ b/crypto/des/cfb64ede.c @@ -1,255 +1,189 @@ -/* crypto/des/cfb64ede.c */ -/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) - * All rights reserved. +/* + * Copyright 1995-2017 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 #include "des_locl.h" -#include "e_os.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_ede3_cfb64_encrypt(const unsigned char *in, unsigned char *out, - long length, DES_key_schedule *ks1, - DES_key_schedule *ks2, DES_key_schedule *ks3, - 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; + long length, DES_key_schedule *ks1, + DES_key_schedule *ks2, DES_key_schedule *ks3, + 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); - c2l(iv,v1); + iv = &(*ivec)[0]; + if (enc) { + while (l--) { + if (n == 0) { + c2l(iv, v0); + c2l(iv, v1); - ti[0]=v0; - ti[1]=v1; - DES_encrypt3(ti,ks1,ks2,ks3); - v0=ti[0]; - v1=ti[1]; + ti[0] = v0; + ti[1] = v1; + DES_encrypt3(ti, ks1, ks2, ks3); + v0 = ti[0]; + v1 = ti[1]; - iv = &(*ivec)[0]; - l2c(v0,iv); - l2c(v1,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); - c2l(iv,v1); + iv = &(*ivec)[0]; + l2c(v0, iv); + l2c(v1, 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); + c2l(iv, v1); - ti[0]=v0; - ti[1]=v1; - DES_encrypt3(ti,ks1,ks2,ks3); - v0=ti[0]; - v1=ti[1]; + ti[0] = v0; + ti[1] = v1; + DES_encrypt3(ti, ks1, ks2, ks3); + v0 = ti[0]; + v1 = ti[1]; - iv = &(*ivec)[0]; - l2c(v0,iv); - l2c(v1,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; - } + iv = &(*ivec)[0]; + l2c(v0, iv); + l2c(v1, 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; +} -#ifdef undef /* MACRO */ -void DES_ede2_cfb64_encrypt(unsigned char *in, unsigned char *out, long length, - DES_key_schedule ks1, DES_key_schedule ks2, DES_cblock (*ivec), - int *num, int enc) - { - DES_ede3_cfb64_encrypt(in,out,length,ks1,ks2,ks1,ivec,num,enc); - } -#endif - -/* This is compatible with the single key CFB-r for DES, even thought that's +/* + * This is compatible with the single key CFB-r for DES, even thought that's * not what EVP needs. */ -void DES_ede3_cfb_encrypt(const unsigned char *in,unsigned char *out, - int numbits,long length,DES_key_schedule *ks1, - DES_key_schedule *ks2,DES_key_schedule *ks3, - DES_cblock *ivec,int enc) - { - register DES_LONG d0,d1,v0,v1; - register unsigned long l=length,n=((unsigned int)numbits+7)/8; - register int num=numbits,i; - DES_LONG ti[2]; - unsigned char *iv; - unsigned char ovec[16]; - - if (num > 64) return; - iv = &(*ivec)[0]; - c2l(iv,v0); - c2l(iv,v1); - if (enc) - { - while (l >= n) - { - l-=n; - ti[0]=v0; - ti[1]=v1; - DES_encrypt3(ti,ks1,ks2,ks3); - c2ln(in,d0,d1,n); - in+=n; - d0^=ti[0]; - d1^=ti[1]; - l2cn(d0,d1,out,n); - out+=n; - /* 30-08-94 - eay - changed because l>>32 and - * l<<32 are bad under gcc :-( */ - if (num == 32) - { v0=v1; v1=d0; } - else if (num == 64) - { v0=d0; v1=d1; } - else - { - iv=&ovec[0]; - l2c(v0,iv); - l2c(v1,iv); - l2c(d0,iv); - l2c(d1,iv); - /* shift ovec left most of the bits... */ - memmove(ovec,ovec+num/8,8+(num%8 ? 1 : 0)); - /* now the remaining bits */ - if(num%8 != 0) - for(i=0 ; i < 8 ; ++i) - { - ovec[i]<<=num%8; - ovec[i]|=ovec[i+1]>>(8-num%8); - } - iv=&ovec[0]; - c2l(iv,v0); - c2l(iv,v1); - } - } - } - else - { - while (l >= n) - { - l-=n; - ti[0]=v0; - ti[1]=v1; - DES_encrypt3(ti,ks1,ks2,ks3); - c2ln(in,d0,d1,n); - in+=n; - /* 30-08-94 - eay - changed because l>>32 and - * l<<32 are bad under gcc :-( */ - if (num == 32) - { v0=v1; v1=d0; } - else if (num == 64) - { v0=d0; v1=d1; } - else - { - iv=&ovec[0]; - l2c(v0,iv); - l2c(v1,iv); - l2c(d0,iv); - l2c(d1,iv); - /* shift ovec left most of the bits... */ - memmove(ovec,ovec+num/8,8+(num%8 ? 1 : 0)); - /* now the remaining bits */ - if(num%8 != 0) - for(i=0 ; i < 8 ; ++i) - { - ovec[i]<<=num%8; - ovec[i]|=ovec[i+1]>>(8-num%8); - } - iv=&ovec[0]; - c2l(iv,v0); - c2l(iv,v1); - } - d0^=ti[0]; - d1^=ti[1]; - l2cn(d0,d1,out,n); - out+=n; - } - } - iv = &(*ivec)[0]; - l2c(v0,iv); - l2c(v1,iv); - v0=v1=d0=d1=ti[0]=ti[1]=0; - } +void DES_ede3_cfb_encrypt(const unsigned char *in, unsigned char *out, + int numbits, long length, DES_key_schedule *ks1, + DES_key_schedule *ks2, DES_key_schedule *ks3, + DES_cblock *ivec, int enc) +{ + register DES_LONG d0, d1, v0, v1; + register unsigned long l = length, n = ((unsigned int)numbits + 7) / 8; + register int num = numbits, i; + DES_LONG ti[2]; + unsigned char *iv; + unsigned char ovec[16]; + if (num > 64) + return; + iv = &(*ivec)[0]; + c2l(iv, v0); + c2l(iv, v1); + if (enc) { + while (l >= n) { + l -= n; + ti[0] = v0; + ti[1] = v1; + DES_encrypt3(ti, ks1, ks2, ks3); + c2ln(in, d0, d1, n); + in += n; + d0 ^= ti[0]; + d1 ^= ti[1]; + l2cn(d0, d1, out, n); + out += n; + /* + * 30-08-94 - eay - changed because l>>32 and l<<32 are bad under + * gcc :-( + */ + if (num == 32) { + v0 = v1; + v1 = d0; + } else if (num == 64) { + v0 = d0; + v1 = d1; + } else { + iv = &ovec[0]; + l2c(v0, iv); + l2c(v1, iv); + l2c(d0, iv); + l2c(d1, iv); + /* shift ovec left most of the bits... */ + memmove(ovec, ovec + num / 8, 8 + (num % 8 ? 1 : 0)); + /* now the remaining bits */ + if (num % 8 != 0) + for (i = 0; i < 8; ++i) { + ovec[i] <<= num % 8; + ovec[i] |= ovec[i + 1] >> (8 - num % 8); + } + iv = &ovec[0]; + c2l(iv, v0); + c2l(iv, v1); + } + } + } else { + while (l >= n) { + l -= n; + ti[0] = v0; + ti[1] = v1; + DES_encrypt3(ti, ks1, ks2, ks3); + c2ln(in, d0, d1, n); + in += n; + /* + * 30-08-94 - eay - changed because l>>32 and l<<32 are bad under + * gcc :-( + */ + if (num == 32) { + v0 = v1; + v1 = d0; + } else if (num == 64) { + v0 = d0; + v1 = d1; + } else { + iv = &ovec[0]; + l2c(v0, iv); + l2c(v1, iv); + l2c(d0, iv); + l2c(d1, iv); + /* shift ovec left most of the bits... */ + memmove(ovec, ovec + num / 8, 8 + (num % 8 ? 1 : 0)); + /* now the remaining bits */ + if (num % 8 != 0) + for (i = 0; i < 8; ++i) { + ovec[i] <<= num % 8; + ovec[i] |= ovec[i + 1] >> (8 - num % 8); + } + iv = &ovec[0]; + c2l(iv, v0); + c2l(iv, v1); + } + d0 ^= ti[0]; + d1 ^= ti[1]; + l2cn(d0, d1, out, n); + out += n; + } + } + iv = &(*ivec)[0]; + l2c(v0, iv); + l2c(v1, iv); + v0 = v1 = d0 = d1 = ti[0] = ti[1] = 0; +}