-/* crypto/des/pcbc_enc.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"
-void des_pcbc_encrypt(input, output, length, schedule, ivec, enc)
-des_cblock (*input);
-des_cblock (*output);
-long length;
-des_key_schedule schedule;
-des_cblock (*ivec);
-int enc;
- {
- register DES_LONG sin0,sin1,xor0,xor1,tout0,tout1;
- DES_LONG tin[2];
- unsigned char *in,*out,*iv;
+void DES_pcbc_encrypt(const unsigned char *input, unsigned char *output,
+ long length, DES_key_schedule *schedule,
+ DES_cblock *ivec, int enc)
+{
+ register DES_LONG sin0, sin1, xor0, xor1, tout0, tout1;
+ DES_LONG tin[2];
+ const unsigned char *in;
+ unsigned char *out, *iv;
- in=(unsigned char *)input;
- out=(unsigned char *)output;
- iv=(unsigned char *)ivec;
+ in = input;
+ out = output;
+ iv = &(*ivec)[0];
- if (enc)
- {
- c2l(iv,xor0);
- c2l(iv,xor1);
- for (; length>0; length-=8)
- {
- if (length >= 8)
- {
- c2l(in,sin0);
- c2l(in,sin1);
- }
- else
- c2ln(in,sin0,sin1,length);
- tin[0]=sin0^xor0;
- tin[1]=sin1^xor1;
- des_encrypt((DES_LONG *)tin,schedule,DES_ENCRYPT);
- tout0=tin[0];
- tout1=tin[1];
- xor0=sin0^tout0;
- xor1=sin1^tout1;
- l2c(tout0,out);
- l2c(tout1,out);
- }
- }
- else
- {
- c2l(iv,xor0); c2l(iv,xor1);
- for (; length>0; length-=8)
- {
- c2l(in,sin0);
- c2l(in,sin1);
- tin[0]=sin0;
- tin[1]=sin1;
- des_encrypt((DES_LONG *)tin,schedule,DES_DECRYPT);
- tout0=tin[0]^xor0;
- tout1=tin[1]^xor1;
- if (length >= 8)
- {
- l2c(tout0,out);
- l2c(tout1,out);
- }
- else
- l2cn(tout0,tout1,out,length);
- xor0=tout0^sin0;
- xor1=tout1^sin1;
- }
- }
- tin[0]=tin[1]=0;
- sin0=sin1=xor0=xor1=tout0=tout1=0;
- }
+ if (enc) {
+ c2l(iv, xor0);
+ c2l(iv, xor1);
+ for (; length > 0; length -= 8) {
+ if (length >= 8) {
+ c2l(in, sin0);
+ c2l(in, sin1);
+ } else
+ c2ln(in, sin0, sin1, length);
+ tin[0] = sin0 ^ xor0;
+ tin[1] = sin1 ^ xor1;
+ DES_encrypt1((DES_LONG *)tin, schedule, DES_ENCRYPT);
+ tout0 = tin[0];
+ tout1 = tin[1];
+ xor0 = sin0 ^ tout0;
+ xor1 = sin1 ^ tout1;
+ l2c(tout0, out);
+ l2c(tout1, out);
+ }
+ } else {
+ c2l(iv, xor0);
+ c2l(iv, xor1);
+ for (; length > 0; length -= 8) {
+ c2l(in, sin0);
+ c2l(in, sin1);
+ tin[0] = sin0;
+ tin[1] = sin1;
+ DES_encrypt1((DES_LONG *)tin, schedule, DES_DECRYPT);
+ tout0 = tin[0] ^ xor0;
+ tout1 = tin[1] ^ xor1;
+ if (length >= 8) {
+ l2c(tout0, out);
+ l2c(tout1, out);
+ } else
+ l2cn(tout0, tout1, out, length);
+ xor0 = tout0 ^ sin0;
+ xor1 = tout1 ^ sin1;
+ }
+ }
+ tin[0] = tin[1] = 0;
+ sin0 = sin1 = xor0 = xor1 = tout0 = tout1 = 0;
+}
projects / openssl.git / blobdiff