X-Git-Url: https://git.openssl.org/gitweb/?p=openssl.git;a=blobdiff_plain;f=crypto%2Fdes%2Fcfb64ede.c;h=5edb979e1069eed1fb20845d34d548d28a13cac6;hp=f62373792b1728b49e156143fa05b598cb9f7e5a;hb=a3b0d466930ec45bc3ddf4c9e853d73d37783f44;hpb=eda1f21f1af8b6f77327e7b37573af9c1ba73726 diff --git a/crypto/des/cfb64ede.c b/crypto/des/cfb64ede.c index f62373792b..5edb979e10 100644 --- a/crypto/des/cfb64ede.c +++ b/crypto/des/cfb64ede.c @@ -1,151 +1,190 @@ -/* crypto/des/cfb64ede.c */ -/* Copyright (C) 1995-1997 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" +#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(in, out, length, ks1,ks2,ks3, ivec, num, enc) -unsigned char *in; -unsigned char *out; -long length; -des_key_schedule ks1,ks2,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; +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; - iv=(unsigned char *)ivec; - 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((DES_LONG *)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=(unsigned char *)ivec; - l2c(v0,iv); - l2c(v1,iv); - iv=(unsigned char *)ivec; - } - 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((DES_LONG *)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=(unsigned char *)ivec; - l2c(v0,iv); - l2c(v1,iv); - iv=(unsigned char *)ivec; - } - 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(in, out, length, ks1,ks2, ivec, num, enc) -unsigned char *in; -unsigned char *out; -long length; -des_key_schedule ks1,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 + * 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; +}