fuchsia / third_party / llvm-test-suite / refs/tags/llvmorg-12.0.1 / . / MultiSource / Benchmarks / VersaBench / ecbdes / set_key.c

/* crypto/des/set_key.c */ | |

/* Copyright (C) 1996 Eric Young (eay@mincom.oz.au) | |

* All rights reserved. | |

* | |

* This package is an SSL implementation written | |

* by Eric Young (eay@mincom.oz.au). | |

* 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@mincom.oz.au). | |

* | |

* 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@mincom.oz.au)" | |

* 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@mincom.oz.au)" | |

* | |

* 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 */ | |

if (memcmp(weak_keys[i],key,sizeof(key)) == 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++)=((t2<<2L)|(t2>>30L))&0xffffffffL; | |

t2=((s>>16L)|(t&0xffff0000L)); | |

*(k++)=((t2<<6L)|(t2>>26L))&0xffffffffL; | |

} | |

return(0); | |

} | |

int des_key_sched(key, schedule) | |

des_cblock (*key); | |

des_key_schedule schedule; | |

{ | |

return(des_set_key(key,schedule)); | |

} |