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Diffstat (limited to 'crypto/des/des_enc.c')
| -rw-r--r-- | crypto/des/des_enc.c | 301 |
1 files changed, 301 insertions, 0 deletions
diff --git a/crypto/des/des_enc.c b/crypto/des/des_enc.c new file mode 100644 index 0000000000..b04e12dc29 --- /dev/null +++ b/crypto/des/des_enc.c @@ -0,0 +1,301 @@ +/* crypto/des/des_enc.c */ +/* Copyright (C) 1995-1997 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 "des_locl.h" + +void des_encrypt(data, ks, enc) +DES_LONG *data; +des_key_schedule ks; +int enc; + { + register DES_LONG l,r,t,u; +#ifdef DES_PTR + register unsigned char *des_SP=(unsigned char *)des_SPtrans; +#endif +#ifndef DES_UNROLL + register int i; +#endif + register 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=(DES_LONG *)ks; + /* 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(data, ks, enc) +DES_LONG *data; +des_key_schedule ks; +int enc; + { + register DES_LONG l,r,t,u; +#ifdef DES_PTR + register unsigned char *des_SP=(unsigned char *)des_SPtrans; +#endif +#ifndef DES_UNROLL + register int i; +#endif + register 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)&0xffffffff; + l=ROTATE(l,29)&0xffffffff; + + s=(DES_LONG *)ks; + /* 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)&0xffffffff; + data[1]=ROTATE(r,3)&0xffffffff; + l=r=t=u=0; + } + +void des_encrypt3(data,ks1,ks2,ks3) +DES_LONG *data; +des_key_schedule ks1; +des_key_schedule ks2; +des_key_schedule ks3; + { + register 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(data,ks1,ks2,ks3) +DES_LONG *data; +des_key_schedule ks1; +des_key_schedule ks2; +des_key_schedule ks3; + { + register 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; + } + |