| /* 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 <openssl/opensslconf.h> |
| #if !defined(OPENSSL_SYS_STARBOARD) |
| #include <stdio.h> |
| #endif // !defined(OPENSSL_SYS_STARBOARD) |
| |
| /* |
| * 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; |
| } |