+++ /dev/null
-/* crypto/rc2/rc2_cbc.c */
-/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
- * 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.]
- */
-
-#include <openssl/rc2.h>
-#include "rc2_locl.h"
-
-void RC2_cbc_encrypt(const unsigned char *in, unsigned char *out, long length,
- RC2_KEY *ks, unsigned char *iv, int encrypt)
- {
- register unsigned long tin0,tin1;
- register unsigned long tout0,tout1,xor0,xor1;
- register long l=length;
- unsigned long tin[2];
-
- if (encrypt)
- {
- c2l(iv,tout0);
- c2l(iv,tout1);
- iv-=8;
- for (l-=8; l>=0; l-=8)
- {
- c2l(in,tin0);
- c2l(in,tin1);
- tin0^=tout0;
- tin1^=tout1;
- tin[0]=tin0;
- tin[1]=tin1;
- RC2_encrypt(tin,ks);
- tout0=tin[0]; l2c(tout0,out);
- tout1=tin[1]; l2c(tout1,out);
- }
- if (l != -8)
- {
- c2ln(in,tin0,tin1,l+8);
- tin0^=tout0;
- tin1^=tout1;
- tin[0]=tin0;
- tin[1]=tin1;
- RC2_encrypt(tin,ks);
- tout0=tin[0]; l2c(tout0,out);
- tout1=tin[1]; l2c(tout1,out);
- }
- l2c(tout0,iv);
- l2c(tout1,iv);
- }
- else
- {
- c2l(iv,xor0);
- c2l(iv,xor1);
- iv-=8;
- for (l-=8; l>=0; l-=8)
- {
- c2l(in,tin0); tin[0]=tin0;
- c2l(in,tin1); tin[1]=tin1;
- RC2_decrypt(tin,ks);
- tout0=tin[0]^xor0;
- tout1=tin[1]^xor1;
- l2c(tout0,out);
- l2c(tout1,out);
- xor0=tin0;
- xor1=tin1;
- }
- if (l != -8)
- {
- c2l(in,tin0); tin[0]=tin0;
- c2l(in,tin1); tin[1]=tin1;
- RC2_decrypt(tin,ks);
- tout0=tin[0]^xor0;
- tout1=tin[1]^xor1;
- l2cn(tout0,tout1,out,l+8);
- xor0=tin0;
- xor1=tin1;
- }
- l2c(xor0,iv);
- l2c(xor1,iv);
- }
- tin0=tin1=tout0=tout1=xor0=xor1=0;
- tin[0]=tin[1]=0;
- }
-
-void RC2_encrypt(unsigned long *d, RC2_KEY *key)
- {
- int i,n;
- register RC2_INT *p0,*p1;
- register RC2_INT x0,x1,x2,x3,t;
- unsigned long l;
-
- l=d[0];
- x0=(RC2_INT)l&0xffff;
- x1=(RC2_INT)(l>>16L);
- l=d[1];
- x2=(RC2_INT)l&0xffff;
- x3=(RC2_INT)(l>>16L);
-
- n=3;
- i=5;
-
- p0=p1= &(key->data[0]);
- for (;;)
- {
- t=(x0+(x1& ~x3)+(x2&x3)+ *(p0++))&0xffff;
- x0=(t<<1)|(t>>15);
- t=(x1+(x2& ~x0)+(x3&x0)+ *(p0++))&0xffff;
- x1=(t<<2)|(t>>14);
- t=(x2+(x3& ~x1)+(x0&x1)+ *(p0++))&0xffff;
- x2=(t<<3)|(t>>13);
- t=(x3+(x0& ~x2)+(x1&x2)+ *(p0++))&0xffff;
- x3=(t<<5)|(t>>11);
-
- if (--i == 0)
- {
- if (--n == 0) break;
- i=(n == 2)?6:5;
-
- x0+=p1[x3&0x3f];
- x1+=p1[x0&0x3f];
- x2+=p1[x1&0x3f];
- x3+=p1[x2&0x3f];
- }
- }
-
- d[0]=(unsigned long)(x0&0xffff)|((unsigned long)(x1&0xffff)<<16L);
- d[1]=(unsigned long)(x2&0xffff)|((unsigned long)(x3&0xffff)<<16L);
- }
-
-void RC2_decrypt(unsigned long *d, RC2_KEY *key)
- {
- int i,n;
- register RC2_INT *p0,*p1;
- register RC2_INT x0,x1,x2,x3,t;
- unsigned long l;
-
- l=d[0];
- x0=(RC2_INT)l&0xffff;
- x1=(RC2_INT)(l>>16L);
- l=d[1];
- x2=(RC2_INT)l&0xffff;
- x3=(RC2_INT)(l>>16L);
-
- n=3;
- i=5;
-
- p0= &(key->data[63]);
- p1= &(key->data[0]);
- for (;;)
- {
- t=((x3<<11)|(x3>>5))&0xffff;
- x3=(t-(x0& ~x2)-(x1&x2)- *(p0--))&0xffff;
- t=((x2<<13)|(x2>>3))&0xffff;
- x2=(t-(x3& ~x1)-(x0&x1)- *(p0--))&0xffff;
- t=((x1<<14)|(x1>>2))&0xffff;
- x1=(t-(x2& ~x0)-(x3&x0)- *(p0--))&0xffff;
- t=((x0<<15)|(x0>>1))&0xffff;
- x0=(t-(x1& ~x3)-(x2&x3)- *(p0--))&0xffff;
-
- if (--i == 0)
- {
- if (--n == 0) break;
- i=(n == 2)?6:5;
-
- x3=(x3-p1[x2&0x3f])&0xffff;
- x2=(x2-p1[x1&0x3f])&0xffff;
- x1=(x1-p1[x0&0x3f])&0xffff;
- x0=(x0-p1[x3&0x3f])&0xffff;
- }
- }
-
- d[0]=(unsigned long)(x0&0xffff)|((unsigned long)(x1&0xffff)<<16L);
- d[1]=(unsigned long)(x2&0xffff)|((unsigned long)(x3&0xffff)<<16L);
- }
-
projects / bcm963xx.git / blobdiff