X-Git-Url: https://git.openssl.org/gitweb/?p=openssl.git;a=blobdiff_plain;f=crypto%2Fdes%2Fofb64enc.c;h=30976c871daa12e2d4c34071891db34ec4b08d4f;hp=1a1d1f1ac47076eb7947c2dc32e2f3cccf48a594;hb=4e585e720195788c9546a9ce71d63dafdfd2aaf1;hpb=080b8cadfa9a9c7655fb0dbd5e432b09d708ab3b diff --git a/crypto/des/ofb64enc.c b/crypto/des/ofb64enc.c index 1a1d1f1ac4..30976c871d 100644 --- a/crypto/des/ofb64enc.c +++ b/crypto/des/ofb64enc.c @@ -1,110 +1,60 @@ -/* crypto/des/ofb64enc.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 ofb 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 ofb 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_ofb64_encrypt(register const unsigned char *in, - register unsigned char *out, long length, des_key_schedule schedule, - des_cblock *ivec, int *num) - { - register DES_LONG v0,v1,t; - register int n= *num; - register long l=length; - des_cblock d; - register unsigned char *dp; - DES_LONG ti[2]; - unsigned char *iv; - int save=0; - - iv = &(*ivec)[0]; - c2l(iv,v0); - c2l(iv,v1); - ti[0]=v0; - ti[1]=v1; - dp=d; - l2c(v0,dp); - l2c(v1,dp); - while (l--) - { - if (n == 0) - { - des_encrypt1(ti,schedule,DES_ENCRYPT); - dp=d; - t=ti[0]; l2c(t,dp); - t=ti[1]; l2c(t,dp); - save++; - } - *(out++)= *(in++)^d[n]; - n=(n+1)&0x07; - } - if (save) - { - v0=ti[0]; - v1=ti[1]; - iv = &(*ivec)[0]; - l2c(v0,iv); - l2c(v1,iv); - } - t=v0=v1=ti[0]=ti[1]=0; - *num=n; - } +void DES_ofb64_encrypt(register const unsigned char *in, + register unsigned char *out, long length, + DES_key_schedule *schedule, DES_cblock *ivec, int *num) +{ + register DES_LONG v0, v1, t; + register int n = *num; + register long l = length; + DES_cblock d; + register unsigned char *dp; + DES_LONG ti[2]; + unsigned char *iv; + int save = 0; + iv = &(*ivec)[0]; + c2l(iv, v0); + c2l(iv, v1); + ti[0] = v0; + ti[1] = v1; + dp = d; + l2c(v0, dp); + l2c(v1, dp); + while (l--) { + if (n == 0) { + DES_encrypt1(ti, schedule, DES_ENCRYPT); + dp = d; + t = ti[0]; + l2c(t, dp); + t = ti[1]; + l2c(t, dp); + save++; + } + *(out++) = *(in++) ^ d[n]; + n = (n + 1) & 0x07; + } + if (save) { + v0 = ti[0]; + v1 = ti[1]; + iv = &(*ivec)[0]; + l2c(v0, iv); + l2c(v1, iv); + } + t = v0 = v1 = ti[0] = ti[1] = 0; + *num = n; +}