+++ /dev/null
-/* 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;
- const register 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;
- const register 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
projects / apple / security.git / blobdiff