/* $KAME: des_enc.c,v 1.1 2001/09/10 04:03:58 itojun Exp $ */ /* crypto/des/des_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 <sys/types.h> #include <crypto/des/des_locl.h> extern const DES_LONG des_SPtrans[8][64]; void des_encrypt1(DES_LONG *data, des_key_schedule ks, int enc) { DES_LONG l,r,t,u; #ifdef DES_PTR const unsigned char *des_SP=(const unsigned char *)des_SPtrans; #endif #ifndef DES_UNROLL int i; #endif DES_LONG *s; r=data[0]; l=data[1]; IP(r,l); /* Things have been modified so that the initial rotate is * done outside the loop. This required the * des_SPtrans values in sp.h to be rotated 1 bit to the right. * One perl script later and things have a 5% speed up on a sparc2. * Thanks to Richard Outerbridge <71755.204@CompuServe.COM> * for pointing this out. */ /* clear the top bits on machines with 8byte longs */ /* shift left by 2 */ r=ROTATE(r,29)&0xffffffffL; l=ROTATE(l,29)&0xffffffffL; s=ks->ks.deslong; /* I don't know if it is worth the effort of loop unrolling the * inner loop */ if (enc) { #ifdef DES_UNROLL D_ENCRYPT(l,r, 0); /* 1 */ D_ENCRYPT(r,l, 2); /* 2 */ D_ENCRYPT(l,r, 4); /* 3 */ D_ENCRYPT(r,l, 6); /* 4 */ D_ENCRYPT(l,r, 8); /* 5 */ D_ENCRYPT(r,l,10); /* 6 */ D_ENCRYPT(l,r,12); /* 7 */ D_ENCRYPT(r,l,14); /* 8 */ D_ENCRYPT(l,r,16); /* 9 */ D_ENCRYPT(r,l,18); /* 10 */ D_ENCRYPT(l,r,20); /* 11 */ D_ENCRYPT(r,l,22); /* 12 */ D_ENCRYPT(l,r,24); /* 13 */ D_ENCRYPT(r,l,26); /* 14 */ D_ENCRYPT(l,r,28); /* 15 */ D_ENCRYPT(r,l,30); /* 16 */ #else for (i=0; i<32; i+=8) { D_ENCRYPT(l,r,i+0); /* 1 */ D_ENCRYPT(r,l,i+2); /* 2 */ D_ENCRYPT(l,r,i+4); /* 3 */ D_ENCRYPT(r,l,i+6); /* 4 */ } #endif } else { #ifdef DES_UNROLL D_ENCRYPT(l,r,30); /* 16 */ D_ENCRYPT(r,l,28); /* 15 */ D_ENCRYPT(l,r,26); /* 14 */ D_ENCRYPT(r,l,24); /* 13 */ D_ENCRYPT(l,r,22); /* 12 */ D_ENCRYPT(r,l,20); /* 11 */ D_ENCRYPT(l,r,18); /* 10 */ D_ENCRYPT(r,l,16); /* 9 */ D_ENCRYPT(l,r,14); /* 8 */ D_ENCRYPT(r,l,12); /* 7 */ D_ENCRYPT(l,r,10); /* 6 */ D_ENCRYPT(r,l, 8); /* 5 */ D_ENCRYPT(l,r, 6); /* 4 */ D_ENCRYPT(r,l, 4); /* 3 */ D_ENCRYPT(l,r, 2); /* 2 */ D_ENCRYPT(r,l, 0); /* 1 */ #else for (i=30; i>0; i-=8) { D_ENCRYPT(l,r,i-0); /* 16 */ D_ENCRYPT(r,l,i-2); /* 15 */ D_ENCRYPT(l,r,i-4); /* 14 */ D_ENCRYPT(r,l,i-6); /* 13 */ } #endif } /* rotate and clear the top bits on machines with 8byte longs */ l=ROTATE(l,3)&0xffffffffL; r=ROTATE(r,3)&0xffffffffL; FP(r,l); data[0]=l; data[1]=r; l=r=t=u=0; } void des_encrypt2(DES_LONG *data, des_key_schedule ks, int enc) { DES_LONG l,r,t,u; #ifdef DES_PTR const unsigned char *des_SP=(const unsigned char *)des_SPtrans; #endif #ifndef DES_UNROLL int i; #endif DES_LONG *s; r=data[0]; l=data[1]; /* Things have been modified so that the initial rotate is * done outside the loop. This required the * des_SPtrans values in sp.h to be rotated 1 bit to the right. * One perl script later and things have a 5% speed up on a sparc2. * Thanks to Richard Outerbridge <71755.204@CompuServe.COM> * for pointing this out. */ /* clear the top bits on machines with 8byte longs */ r=ROTATE(r,29)&0xffffffffL; l=ROTATE(l,29)&0xffffffffL; s=ks->ks.deslong; /* I don't know if it is worth the effort of loop unrolling the * inner loop */ if (enc) { #ifdef DES_UNROLL D_ENCRYPT(l,r, 0); /* 1 */ D_ENCRYPT(r,l, 2); /* 2 */ D_ENCRYPT(l,r, 4); /* 3 */ D_ENCRYPT(r,l, 6); /* 4 */ D_ENCRYPT(l,r, 8); /* 5 */ D_ENCRYPT(r,l,10); /* 6 */ D_ENCRYPT(l,r,12); /* 7 */ D_ENCRYPT(r,l,14); /* 8 */ D_ENCRYPT(l,r,16); /* 9 */ D_ENCRYPT(r,l,18); /* 10 */ D_ENCRYPT(l,r,20); /* 11 */ D_ENCRYPT(r,l,22); /* 12 */ D_ENCRYPT(l,r,24); /* 13 */ D_ENCRYPT(r,l,26); /* 14 */ D_ENCRYPT(l,r,28); /* 15 */ D_ENCRYPT(r,l,30); /* 16 */ #else for (i=0; i<32; i+=8) { D_ENCRYPT(l,r,i+0); /* 1 */ D_ENCRYPT(r,l,i+2); /* 2 */ D_ENCRYPT(l,r,i+4); /* 3 */ D_ENCRYPT(r,l,i+6); /* 4 */ } #endif } else { #ifdef DES_UNROLL D_ENCRYPT(l,r,30); /* 16 */ D_ENCRYPT(r,l,28); /* 15 */ D_ENCRYPT(l,r,26); /* 14 */ D_ENCRYPT(r,l,24); /* 13 */ D_ENCRYPT(l,r,22); /* 12 */ D_ENCRYPT(r,l,20); /* 11 */ D_ENCRYPT(l,r,18); /* 10 */ D_ENCRYPT(r,l,16); /* 9 */ D_ENCRYPT(l,r,14); /* 8 */ D_ENCRYPT(r,l,12); /* 7 */ D_ENCRYPT(l,r,10); /* 6 */ D_ENCRYPT(r,l, 8); /* 5 */ D_ENCRYPT(l,r, 6); /* 4 */ D_ENCRYPT(r,l, 4); /* 3 */ D_ENCRYPT(l,r, 2); /* 2 */ D_ENCRYPT(r,l, 0); /* 1 */ #else for (i=30; i>0; i-=8) { D_ENCRYPT(l,r,i-0); /* 16 */ D_ENCRYPT(r,l,i-2); /* 15 */ D_ENCRYPT(l,r,i-4); /* 14 */ D_ENCRYPT(r,l,i-6); /* 13 */ } #endif } /* rotate and clear the top bits on machines with 8byte longs */ data[0]=ROTATE(l,3)&0xffffffffL; data[1]=ROTATE(r,3)&0xffffffffL; l=r=t=u=0; } void des_encrypt3(DES_LONG *data, des_key_schedule ks1, des_key_schedule ks2, des_key_schedule ks3) { DES_LONG l,r; l=data[0]; r=data[1]; IP(l,r); data[0]=l; data[1]=r; des_encrypt2((DES_LONG *)data,ks1,DES_ENCRYPT); des_encrypt2((DES_LONG *)data,ks2,DES_DECRYPT); des_encrypt2((DES_LONG *)data,ks3,DES_ENCRYPT); l=data[0]; r=data[1]; FP(r,l); data[0]=l; data[1]=r; } void des_decrypt3(DES_LONG *data, des_key_schedule ks1, des_key_schedule ks2, des_key_schedule ks3) { DES_LONG l,r; l=data[0]; r=data[1]; IP(l,r); data[0]=l; data[1]=r; des_encrypt2((DES_LONG *)data,ks3,DES_DECRYPT); des_encrypt2((DES_LONG *)data,ks2,DES_ENCRYPT); des_encrypt2((DES_LONG *)data,ks1,DES_DECRYPT); l=data[0]; r=data[1]; FP(r,l); data[0]=l; data[1]=r; }
