307 lines
7.5 KiB
C
307 lines
7.5 KiB
C
|
/* crypto/bf/bf_enc.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/blowfish.h>
|
||
|
|
#include "bf_locl.h"
|
||
|
|
|
||
|
|
/* Blowfish as implemented from 'Blowfish: Springer-Verlag paper'
|
||
|
|
* (From LECTURE NOTES IN COMPUTER SCIENCE 809, FAST SOFTWARE ENCRYPTION,
|
||
|
|
* CAMBRIDGE SECURITY WORKSHOP, CAMBRIDGE, U.K., DECEMBER 9-11, 1993)
|
||
|
|
*/
|
||
|
|
|
||
|
|
#if (BF_ROUNDS != 16) && (BF_ROUNDS != 20)
|
||
|
|
#error If you set BF_ROUNDS to some value other than 16 or 20, you will have \
|
||
|
|
to modify the code.
|
||
|
|
#endif
|
||
|
|
|
||
|
|
void BF_encrypt(BF_LONG *data, const BF_KEY *key)
|
||
|
|
{
|
||
|
|
#ifndef BF_PTR2
|
||
|
|
register BF_LONG l,r;
|
||
|
|
register const BF_LONG *p,*s;
|
||
|
|
|
||
|
|
p=key->P;
|
||
|
|
s= &(key->S[0]);
|
||
|
|
l=data[0];
|
||
|
|
r=data[1];
|
||
|
|
|
||
|
|
l^=p[0];
|
||
|
|
BF_ENC(r,l,s,p[ 1]);
|
||
|
|
BF_ENC(l,r,s,p[ 2]);
|
||
|
|
BF_ENC(r,l,s,p[ 3]);
|
||
|
|
BF_ENC(l,r,s,p[ 4]);
|
||
|
|
BF_ENC(r,l,s,p[ 5]);
|
||
|
|
BF_ENC(l,r,s,p[ 6]);
|
||
|
|
BF_ENC(r,l,s,p[ 7]);
|
||
|
|
BF_ENC(l,r,s,p[ 8]);
|
||
|
|
BF_ENC(r,l,s,p[ 9]);
|
||
|
|
BF_ENC(l,r,s,p[10]);
|
||
|
|
BF_ENC(r,l,s,p[11]);
|
||
|
|
BF_ENC(l,r,s,p[12]);
|
||
|
|
BF_ENC(r,l,s,p[13]);
|
||
|
|
BF_ENC(l,r,s,p[14]);
|
||
|
|
BF_ENC(r,l,s,p[15]);
|
||
|
|
BF_ENC(l,r,s,p[16]);
|
||
|
|
#if BF_ROUNDS == 20
|
||
|
|
BF_ENC(r,l,s,p[17]);
|
||
|
|
BF_ENC(l,r,s,p[18]);
|
||
|
|
BF_ENC(r,l,s,p[19]);
|
||
|
|
BF_ENC(l,r,s,p[20]);
|
||
|
|
#endif
|
||
|
|
r^=p[BF_ROUNDS+1];
|
||
|
|
|
||
|
|
data[1]=l&0xffffffffL;
|
||
|
|
data[0]=r&0xffffffffL;
|
||
|
|
#else
|
||
|
|
register BF_LONG l,r,t,*k;
|
||
|
|
|
||
|
|
l=data[0];
|
||
|
|
r=data[1];
|
||
|
|
k=(BF_LONG*)key;
|
||
|
|
|
||
|
|
l^=k[0];
|
||
|
|
BF_ENC(r,l,k, 1);
|
||
|
|
BF_ENC(l,r,k, 2);
|
||
|
|
BF_ENC(r,l,k, 3);
|
||
|
|
BF_ENC(l,r,k, 4);
|
||
|
|
BF_ENC(r,l,k, 5);
|
||
|
|
BF_ENC(l,r,k, 6);
|
||
|
|
BF_ENC(r,l,k, 7);
|
||
|
|
BF_ENC(l,r,k, 8);
|
||
|
|
BF_ENC(r,l,k, 9);
|
||
|
|
BF_ENC(l,r,k,10);
|
||
|
|
BF_ENC(r,l,k,11);
|
||
|
|
BF_ENC(l,r,k,12);
|
||
|
|
BF_ENC(r,l,k,13);
|
||
|
|
BF_ENC(l,r,k,14);
|
||
|
|
BF_ENC(r,l,k,15);
|
||
|
|
BF_ENC(l,r,k,16);
|
||
|
|
#if BF_ROUNDS == 20
|
||
|
|
BF_ENC(r,l,k,17);
|
||
|
|
BF_ENC(l,r,k,18);
|
||
|
|
BF_ENC(r,l,k,19);
|
||
|
|
BF_ENC(l,r,k,20);
|
||
|
|
#endif
|
||
|
|
r^=k[BF_ROUNDS+1];
|
||
|
|
|
||
|
|
data[1]=l&0xffffffffL;
|
||
|
|
data[0]=r&0xffffffffL;
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
|
||
|
|
#ifndef BF_DEFAULT_OPTIONS
|
||
|
|
|
||
|
|
void BF_decrypt(BF_LONG *data, const BF_KEY *key)
|
||
|
|
{
|
||
|
|
#ifndef BF_PTR2
|
||
|
|
register BF_LONG l,r;
|
||
|
|
register const BF_LONG *p,*s;
|
||
|
|
|
||
|
|
p=key->P;
|
||
|
|
s= &(key->S[0]);
|
||
|
|
l=data[0];
|
||
|
|
r=data[1];
|
||
|
|
|
||
|
|
l^=p[BF_ROUNDS+1];
|
||
|
|
#if BF_ROUNDS == 20
|
||
|
|
BF_ENC(r,l,s,p[20]);
|
||
|
|
BF_ENC(l,r,s,p[19]);
|
||
|
|
BF_ENC(r,l,s,p[18]);
|
||
|
|
BF_ENC(l,r,s,p[17]);
|
||
|
|
#endif
|
||
|
|
BF_ENC(r,l,s,p[16]);
|
||
|
|
BF_ENC(l,r,s,p[15]);
|
||
|
|
BF_ENC(r,l,s,p[14]);
|
||
|
|
BF_ENC(l,r,s,p[13]);
|
||
|
|
BF_ENC(r,l,s,p[12]);
|
||
|
|
BF_ENC(l,r,s,p[11]);
|
||
|
|
BF_ENC(r,l,s,p[10]);
|
||
|
|
BF_ENC(l,r,s,p[ 9]);
|
||
|
|
BF_ENC(r,l,s,p[ 8]);
|
||
|
|
BF_ENC(l,r,s,p[ 7]);
|
||
|
|
BF_ENC(r,l,s,p[ 6]);
|
||
|
|
BF_ENC(l,r,s,p[ 5]);
|
||
|
|
BF_ENC(r,l,s,p[ 4]);
|
||
|
|
BF_ENC(l,r,s,p[ 3]);
|
||
|
|
BF_ENC(r,l,s,p[ 2]);
|
||
|
|
BF_ENC(l,r,s,p[ 1]);
|
||
|
|
r^=p[0];
|
||
|
|
|
||
|
|
data[1]=l&0xffffffffL;
|
||
|
|
data[0]=r&0xffffffffL;
|
||
|
|
#else
|
||
|
|
register BF_LONG l,r,t,*k;
|
||
|
|
|
||
|
|
l=data[0];
|
||
|
|
r=data[1];
|
||
|
|
k=(BF_LONG *)key;
|
||
|
|
|
||
|
|
l^=k[BF_ROUNDS+1];
|
||
|
|
#if BF_ROUNDS == 20
|
||
|
|
BF_ENC(r,l,k,20);
|
||
|
|
BF_ENC(l,r,k,19);
|
||
|
|
BF_ENC(r,l,k,18);
|
||
|
|
BF_ENC(l,r,k,17);
|
||
|
|
#endif
|
||
|
|
BF_ENC(r,l,k,16);
|
||
|
|
BF_ENC(l,r,k,15);
|
||
|
|
BF_ENC(r,l,k,14);
|
||
|
|
BF_ENC(l,r,k,13);
|
||
|
|
BF_ENC(r,l,k,12);
|
||
|
|
BF_ENC(l,r,k,11);
|
||
|
|
BF_ENC(r,l,k,10);
|
||
|
|
BF_ENC(l,r,k, 9);
|
||
|
|
BF_ENC(r,l,k, 8);
|
||
|
|
BF_ENC(l,r,k, 7);
|
||
|
|
BF_ENC(r,l,k, 6);
|
||
|
|
BF_ENC(l,r,k, 5);
|
||
|
|
BF_ENC(r,l,k, 4);
|
||
|
|
BF_ENC(l,r,k, 3);
|
||
|
|
BF_ENC(r,l,k, 2);
|
||
|
|
BF_ENC(l,r,k, 1);
|
||
|
|
r^=k[0];
|
||
|
|
|
||
|
|
data[1]=l&0xffffffffL;
|
||
|
|
data[0]=r&0xffffffffL;
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
|
||
|
|
void BF_cbc_encrypt(const unsigned char *in, unsigned char *out, long length,
|
||
|
|
const BF_KEY *schedule, unsigned char *ivec, int encrypt)
|
||
|
|
{
|
||
|
|
register BF_LONG tin0,tin1;
|
||
|
|
register BF_LONG tout0,tout1,xor0,xor1;
|
||
|
|
register long l=length;
|
||
|
|
BF_LONG tin[2];
|
||
|
|
|
||
|
|
if (encrypt)
|
||
|
|
{
|
||
|
|
n2l(ivec,tout0);
|
||
|
|
n2l(ivec,tout1);
|
||
|
|
ivec-=8;
|
||
|
|
for (l-=8; l>=0; l-=8)
|
||
|
|
{
|
||
|
|
n2l(in,tin0);
|
||
|
|
n2l(in,tin1);
|
||
|
|
tin0^=tout0;
|
||
|
|
tin1^=tout1;
|
||
|
|
tin[0]=tin0;
|
||
|
|
tin[1]=tin1;
|
||
|
|
BF_encrypt(tin,schedule);
|
||
|
|
tout0=tin[0];
|
||
|
|
tout1=tin[1];
|
||
|
|
l2n(tout0,out);
|
||
|
|
l2n(tout1,out);
|
||
|
|
}
|
||
|
|
if (l != -8)
|
||
|
|
{
|
||
|
|
n2ln(in,tin0,tin1,l+8);
|
||
|
|
tin0^=tout0;
|
||
|
|
tin1^=tout1;
|
||
|
|
tin[0]=tin0;
|
||
|
|
tin[1]=tin1;
|
||
|
|
BF_encrypt(tin,schedule);
|
||
|
|
tout0=tin[0];
|
||
|
|
tout1=tin[1];
|
||
|
|
l2n(tout0,out);
|
||
|
|
l2n(tout1,out);
|
||
|
|
}
|
||
|
|
l2n(tout0,ivec);
|
||
|
|
l2n(tout1,ivec);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
n2l(ivec,xor0);
|
||
|
|
n2l(ivec,xor1);
|
||
|
|
ivec-=8;
|
||
|
|
for (l-=8; l>=0; l-=8)
|
||
|
|
{
|
||
|
|
n2l(in,tin0);
|
||
|
|
n2l(in,tin1);
|
||
|
|
tin[0]=tin0;
|
||
|
|
tin[1]=tin1;
|
||
|
|
BF_decrypt(tin,schedule);
|
||
|
|
tout0=tin[0]^xor0;
|
||
|
|
tout1=tin[1]^xor1;
|
||
|
|
l2n(tout0,out);
|
||
|
|
l2n(tout1,out);
|
||
|
|
xor0=tin0;
|
||
|
|
xor1=tin1;
|
||
|
|
}
|
||
|
|
if (l != -8)
|
||
|
|
{
|
||
|
|
n2l(in,tin0);
|
||
|
|
n2l(in,tin1);
|
||
|
|
tin[0]=tin0;
|
||
|
|
tin[1]=tin1;
|
||
|
|
BF_decrypt(tin,schedule);
|
||
|
|
tout0=tin[0]^xor0;
|
||
|
|
tout1=tin[1]^xor1;
|
||
|
|
l2nn(tout0,tout1,out,l+8);
|
||
|
|
xor0=tin0;
|
||
|
|
xor1=tin1;
|
||
|
|
}
|
||
|
|
l2n(xor0,ivec);
|
||
|
|
l2n(xor1,ivec);
|
||
|
|
}
|
||
|
|
tin0=tin1=tout0=tout1=xor0=xor1=0;
|
||
|
|
tin[0]=tin[1]=0;
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif
|