/* 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 #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; registe
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <openssl/objects.h>
#include <openssl/comp.h>

static int rle_compress_block(COMP_CTX *ctx, unsigned char *out,
	unsigned int olen, unsigned char *in, unsigned int ilen);
static int rle_expand_block(COMP_CTX *ctx, unsigned char *out,
	unsigned int olen, unsigned char *in, unsigned int ilen);

static COMP_METHOD rle_method={
	NID_rle_compression,
	LN_rle_compression,
	NULL,
	NULL,
	rle_compress_block,
	rle_expand_block,
	NULL,
	NULL,
	};

COMP_METHOD *COMP_rle(void)
	{
	return(&rle_method);
	}

static int rle_compress_block(COMP_CTX *ctx, unsigned char *out,
	     unsigned int olen, unsigned char *in, unsigned int ilen)
	{
	/* int i; */

	if (olen < (ilen+1))
		{
		/* ZZZZZZZZZZZZZZZZZZZZZZ */
		return(-1);
		}

	*(out++)=0;
	memcpy(out,in,ilen);
	return(ilen+1);
	}

static int rle_expand_block(COMP_CTX *ctx, unsigned char *out,
	     unsigned int olen, unsigned char *in, unsigned int ilen)
	{
	int i;

	if (olen < (ilen-1))
		{
		/* ZZZZZZZZZZZZZZZZZZZZZZ */
		return(-1);
		}

	i= *(in++);
	if (i == 0)
		{
		memcpy(out,in,ilen-1);
		}
	return(ilen-1);
	}
generated by cgit v1.2.3 (git 2.25.1) at 2025-05-22 22:53:05 +0000