4cd640f684
Same rationale as the previous commits.
(cherry picked from commit 422196759f)
Removed the winrt-specific parts.
123 lines
4.8 KiB
C
123 lines
4.8 KiB
C
/* crypto/des/ofb64ede.c */
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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* All rights reserved.
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*
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* This package is an SSL implementation written
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* by Eric Young (eay@cryptsoft.com).
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* The implementation was written so as to conform with Netscapes SSL.
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*
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* This library is free for commercial and non-commercial use as long as
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* the following conditions are aheared to. The following conditions
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* apply to all code found in this distribution, be it the RC4, RSA,
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation
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* included with this distribution is covered by the same copyright terms
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* except that the holder is Tim Hudson (tjh@cryptsoft.com).
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*
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* Copyright remains Eric Young's, and as such any Copyright notices in
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* the code are not to be removed.
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* If this package is used in a product, Eric Young should be given attribution
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* as the author of the parts of the library used.
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* This can be in the form of a textual message at program startup or
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* in documentation (online or textual) provided with the package.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* "This product includes cryptographic software written by
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* Eric Young (eay@cryptsoft.com)"
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* The word 'cryptographic' can be left out if the rouines from the library
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* being used are not cryptographic related :-).
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* 4. If you include any Windows specific code (or a derivative thereof) from
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* the apps directory (application code) you must include an acknowledgement:
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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*
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* The licence and distribution terms for any publically available version or
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* derivative of this code cannot be changed. i.e. this code cannot simply be
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* copied and put under another distribution licence
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* [including the GNU Public Licence.]
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*/
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#include "des_locl.h"
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/*
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* The input and output encrypted as though 64bit ofb mode is being used.
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* The extra state information to record how much of the 64bit block we have
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* used is contained in *num;
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*/
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void DES_ede3_ofb64_encrypt(register const unsigned char *in,
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register unsigned char *out, long length,
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DES_key_schedule *k1, DES_key_schedule *k2,
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DES_key_schedule *k3, DES_cblock *ivec, int *num)
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{
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register DES_LONG v0, v1;
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register int n = *num;
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register long l = length;
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DES_cblock d;
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register char *dp;
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DES_LONG ti[2];
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unsigned char *iv;
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int save = 0;
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iv = &(*ivec)[0];
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c2l(iv, v0);
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c2l(iv, v1);
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ti[0] = v0;
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ti[1] = v1;
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dp = (char *)d;
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l2c(v0, dp);
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l2c(v1, dp);
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while (l--) {
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if (n == 0) {
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/* ti[0]=v0; */
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/* ti[1]=v1; */
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DES_encrypt3(ti, k1, k2, k3);
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v0 = ti[0];
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v1 = ti[1];
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dp = (char *)d;
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l2c(v0, dp);
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l2c(v1, dp);
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save++;
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}
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*(out++) = *(in++) ^ d[n];
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n = (n + 1) & 0x07;
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}
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if (save) {
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/*- v0=ti[0];
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v1=ti[1];*/
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iv = &(*ivec)[0];
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l2c(v0, iv);
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l2c(v1, iv);
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}
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v0 = v1 = ti[0] = ti[1] = 0;
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*num = n;
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}
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#ifdef undef /* MACRO */
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void DES_ede2_ofb64_encrypt(register unsigned char *in,
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register unsigned char *out, long length,
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DES_key_schedule k1, DES_key_schedule k2,
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DES_cblock (*ivec), int *num)
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{
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DES_ede3_ofb64_encrypt(in, out, length, k1, k2, k1, ivec, num);
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}
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#endif
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