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Diffstat (limited to 'src/libcrypto/libdes/set_key.c')
| -rw-r--r-- | src/libcrypto/libdes/set_key.c | 246 |
1 files changed, 0 insertions, 246 deletions
diff --git a/src/libcrypto/libdes/set_key.c b/src/libcrypto/libdes/set_key.c deleted file mode 100644 index 99ac27348..000000000 --- a/src/libcrypto/libdes/set_key.c +++ /dev/null @@ -1,246 +0,0 @@ -/* crypto/des/set_key.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.] - */ - -/* set_key.c v 1.4 eay 24/9/91 - * 1.4 Speed up by 400% :-) - * 1.3 added register declarations. - * 1.2 unrolled make_key_sched a bit more - * 1.1 added norm_expand_bits - * 1.0 First working version - */ -#include "des_locl.h" -#include "podd.h" -#include "sk.h" - -#ifndef NOPROTO -static int check_parity(des_cblock (*key)); -#else -static int check_parity(); -#endif - -int des_check_key=0; - -void des_set_odd_parity(key) -des_cblock (*key); - { - int i; - - for (i=0; i<DES_KEY_SZ; i++) - (*key)[i]=odd_parity[(*key)[i]]; - } - -static int check_parity(key) -des_cblock (*key); - { - int i; - - for (i=0; i<DES_KEY_SZ; i++) - { - if ((*key)[i] != odd_parity[(*key)[i]]) - return(0); - } - return(1); - } - -/* Weak and semi week keys as take from - * %A D.W. Davies - * %A W.L. Price - * %T Security for Computer Networks - * %I John Wiley & Sons - * %D 1984 - * Many thanks to smb@ulysses.att.com (Steven Bellovin) for the reference - * (and actual cblock values). - */ -#define NUM_WEAK_KEY 16 -static des_cblock weak_keys[NUM_WEAK_KEY]={ - /* weak keys */ - {0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01}, - {0xFE,0xFE,0xFE,0xFE,0xFE,0xFE,0xFE,0xFE}, - {0x1F,0x1F,0x1F,0x1F,0x1F,0x1F,0x1F,0x1F}, - {0xE0,0xE0,0xE0,0xE0,0xE0,0xE0,0xE0,0xE0}, - /* semi-weak keys */ - {0x01,0xFE,0x01,0xFE,0x01,0xFE,0x01,0xFE}, - {0xFE,0x01,0xFE,0x01,0xFE,0x01,0xFE,0x01}, - {0x1F,0xE0,0x1F,0xE0,0x0E,0xF1,0x0E,0xF1}, - {0xE0,0x1F,0xE0,0x1F,0xF1,0x0E,0xF1,0x0E}, - {0x01,0xE0,0x01,0xE0,0x01,0xF1,0x01,0xF1}, - {0xE0,0x01,0xE0,0x01,0xF1,0x01,0xF1,0x01}, - {0x1F,0xFE,0x1F,0xFE,0x0E,0xFE,0x0E,0xFE}, - {0xFE,0x1F,0xFE,0x1F,0xFE,0x0E,0xFE,0x0E}, - {0x01,0x1F,0x01,0x1F,0x01,0x0E,0x01,0x0E}, - {0x1F,0x01,0x1F,0x01,0x0E,0x01,0x0E,0x01}, - {0xE0,0xFE,0xE0,0xFE,0xF1,0xFE,0xF1,0xFE}, - {0xFE,0xE0,0xFE,0xE0,0xFE,0xF1,0xFE,0xF1}}; - -int des_is_weak_key(key) -des_cblock (*key); - { - int i; - - for (i=0; i<NUM_WEAK_KEY; i++) - /* Added == 0 to comparision, I obviously don't run - * this section very often :-(, thanks to - * engineering@MorningStar.Com for the fix - * eay 93/06/29 - * Another problem, I was comparing only the first 4 - * bytes, 97/03/18 */ - if (memcmp(weak_keys[i],key,sizeof(des_cblock)) == 0) return(1); - return(0); - } - -/* NOW DEFINED IN des_local.h - * See ecb_encrypt.c for a pseudo description of these macros. - * #define PERM_OP(a,b,t,n,m) ((t)=((((a)>>(n))^(b))&(m)),\ - * (b)^=(t),\ - * (a)=((a)^((t)<<(n)))) - */ - -#define HPERM_OP(a,t,n,m) ((t)=((((a)<<(16-(n)))^(a))&(m)),\ - (a)=(a)^(t)^(t>>(16-(n)))) - -/* return 0 if key parity is odd (correct), - * return -1 if key parity error, - * return -2 if illegal weak key. - */ -int des_set_key(key, schedule) -des_cblock (*key); -des_key_schedule schedule; - { - static int shifts2[16]={0,0,1,1,1,1,1,1,0,1,1,1,1,1,1,0}; - register DES_LONG c,d,t,s,t2; - register unsigned char *in; - register DES_LONG *k; - register int i; - - if (des_check_key) - { - if (!check_parity(key)) - return(-1); - - if (des_is_weak_key(key)) - return(-2); - } - - k=(DES_LONG *)schedule; - in=(unsigned char *)key; - - c2l(in,c); - c2l(in,d); - - /* do PC1 in 60 simple operations */ -/* PERM_OP(d,c,t,4,0x0f0f0f0fL); - HPERM_OP(c,t,-2, 0xcccc0000L); - HPERM_OP(c,t,-1, 0xaaaa0000L); - HPERM_OP(c,t, 8, 0x00ff0000L); - HPERM_OP(c,t,-1, 0xaaaa0000L); - HPERM_OP(d,t,-8, 0xff000000L); - HPERM_OP(d,t, 8, 0x00ff0000L); - HPERM_OP(d,t, 2, 0x33330000L); - d=((d&0x00aa00aaL)<<7L)|((d&0x55005500L)>>7L)|(d&0xaa55aa55L); - d=(d>>8)|((c&0xf0000000L)>>4); - c&=0x0fffffffL; */ - - /* I now do it in 47 simple operations :-) - * Thanks to John Fletcher (john_fletcher@lccmail.ocf.llnl.gov) - * for the inspiration. :-) */ - PERM_OP (d,c,t,4,0x0f0f0f0fL); - HPERM_OP(c,t,-2,0xcccc0000L); - HPERM_OP(d,t,-2,0xcccc0000L); - PERM_OP (d,c,t,1,0x55555555L); - PERM_OP (c,d,t,8,0x00ff00ffL); - PERM_OP (d,c,t,1,0x55555555L); - d= (((d&0x000000ffL)<<16L)| (d&0x0000ff00L) | - ((d&0x00ff0000L)>>16L)|((c&0xf0000000L)>>4L)); - c&=0x0fffffffL; - - for (i=0; i<ITERATIONS; i++) - { - if (shifts2[i]) - { c=((c>>2L)|(c<<26L)); d=((d>>2L)|(d<<26L)); } - else - { c=((c>>1L)|(c<<27L)); d=((d>>1L)|(d<<27L)); } - c&=0x0fffffffL; - d&=0x0fffffffL; - /* could be a few less shifts but I am to lazy at this - * point in time to investigate */ - s= des_skb[0][ (c )&0x3f ]| - des_skb[1][((c>> 6)&0x03)|((c>> 7L)&0x3c)]| - des_skb[2][((c>>13)&0x0f)|((c>>14L)&0x30)]| - des_skb[3][((c>>20)&0x01)|((c>>21L)&0x06) | - ((c>>22L)&0x38)]; - t= des_skb[4][ (d )&0x3f ]| - des_skb[5][((d>> 7L)&0x03)|((d>> 8L)&0x3c)]| - des_skb[6][ (d>>15L)&0x3f ]| - des_skb[7][((d>>21L)&0x0f)|((d>>22L)&0x30)]; - - /* table contained 0213 4657 */ - t2=((t<<16L)|(s&0x0000ffffL))&0xffffffffL; - *(k++)=ROTATE(t2,30)&0xffffffffL; - - t2=((s>>16L)|(t&0xffff0000L)); - *(k++)=ROTATE(t2,26)&0xffffffffL; - } - return(0); - } - -int des_key_sched(key, schedule) -des_cblock (*key); -des_key_schedule schedule; - { - return(des_set_key(key,schedule)); - } |