-/* 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 "des_locl.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)
-const 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=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(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;
- l2c(v0,iv);
- l2c(v1,iv);
- iv=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(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;
- l2c(v0,iv);
- l2c(v1,iv);
- iv=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;
+}
projects / openssl.git / blobdiff