android / platform / external / openssl / e67c7edd65f69f58535fb358a8665a23e5de62a4 / . / crypto / des / fcrypt_b.c

/* crypto/des/fcrypt_b.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 <stdio.h> | |

/* This version of crypt has been developed from my MIT compatible | |

* DES library. | |

* The library is available at pub/Crypto/DES at ftp.psy.uq.oz.au | |

* Eric Young (eay@cryptsoft.com) | |

*/ | |

#define DES_FCRYPT | |

#include "des_locl.h" | |

#undef DES_FCRYPT | |

#undef PERM_OP | |

#define PERM_OP(a,b,t,n,m) ((t)=((((a)>>(n))^(b))&(m)),\ | |

(b)^=(t),\ | |

(a)^=((t)<<(n))) | |

#undef HPERM_OP | |

#define HPERM_OP(a,t,n,m) ((t)=((((a)<<(16-(n)))^(a))&(m)),\ | |

(a)=(a)^(t)^(t>>(16-(n))))\ | |

void fcrypt_body(DES_LONG *out, DES_key_schedule *ks, DES_LONG Eswap0, | |

DES_LONG Eswap1) | |

{ | |

register DES_LONG l,r,t,u; | |

#ifdef DES_PTR | |

register const unsigned char *des_SP=(const unsigned char *)DES_SPtrans; | |

#endif | |

register DES_LONG *s; | |

register int j; | |

register DES_LONG E0,E1; | |

l=0; | |

r=0; | |

s=(DES_LONG *)ks; | |

E0=Eswap0; | |

E1=Eswap1; | |

for (j=0; j<25; j++) | |

{ | |

#ifndef DES_UNROLL | |

register int i; | |

for (i=0; i<32; i+=4) | |

{ | |

D_ENCRYPT(l,r,i+0); /* 1 */ | |

D_ENCRYPT(r,l,i+2); /* 2 */ | |

} | |

#else | |

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 */ | |

#endif | |

t=l; | |

l=r; | |

r=t; | |

} | |

l=ROTATE(l,3)&0xffffffffL; | |

r=ROTATE(r,3)&0xffffffffL; | |

PERM_OP(l,r,t, 1,0x55555555L); | |

PERM_OP(r,l,t, 8,0x00ff00ffL); | |

PERM_OP(l,r,t, 2,0x33333333L); | |

PERM_OP(r,l,t,16,0x0000ffffL); | |

PERM_OP(l,r,t, 4,0x0f0f0f0fL); | |

out[0]=r; | |

out[1]=l; | |

} | |