155714Skris/* crypto/des/des_locl.h */ 255714Skris/* Copyright (C) 1995-1997 Eric Young (eay@cryptsoft.com) 355714Skris * All rights reserved. 455714Skris * 555714Skris * This package is an SSL implementation written 655714Skris * by Eric Young (eay@cryptsoft.com). 755714Skris * The implementation was written so as to conform with Netscapes SSL. 8280304Sjkim * 955714Skris * This library is free for commercial and non-commercial use as long as 1055714Skris * the following conditions are aheared to. The following conditions 1155714Skris * apply to all code found in this distribution, be it the RC4, RSA, 1255714Skris * lhash, DES, etc., code; not just the SSL code. The SSL documentation 1355714Skris * included with this distribution is covered by the same copyright terms 1455714Skris * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15280304Sjkim * 1655714Skris * Copyright remains Eric Young's, and as such any Copyright notices in 1755714Skris * the code are not to be removed. 1855714Skris * If this package is used in a product, Eric Young should be given attribution 1955714Skris * as the author of the parts of the library used. 2055714Skris * This can be in the form of a textual message at program startup or 2155714Skris * in documentation (online or textual) provided with the package. 22280304Sjkim * 2355714Skris * Redistribution and use in source and binary forms, with or without 2455714Skris * modification, are permitted provided that the following conditions 2555714Skris * are met: 2655714Skris * 1. Redistributions of source code must retain the copyright 2755714Skris * notice, this list of conditions and the following disclaimer. 2855714Skris * 2. Redistributions in binary form must reproduce the above copyright 2955714Skris * notice, this list of conditions and the following disclaimer in the 3055714Skris * documentation and/or other materials provided with the distribution. 3155714Skris * 3. All advertising materials mentioning features or use of this software 3255714Skris * must display the following acknowledgement: 3355714Skris * "This product includes cryptographic software written by 3455714Skris * Eric Young (eay@cryptsoft.com)" 3555714Skris * The word 'cryptographic' can be left out if the rouines from the library 3655714Skris * being used are not cryptographic related :-). 37280304Sjkim * 4. If you include any Windows specific code (or a derivative thereof) from 3855714Skris * the apps directory (application code) you must include an acknowledgement: 3955714Skris * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40280304Sjkim * 4155714Skris * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 4255714Skris * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 4355714Skris * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 4455714Skris * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 4555714Skris * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 4655714Skris * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 4755714Skris * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 4855714Skris * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 4955714Skris * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 5055714Skris * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 5155714Skris * SUCH DAMAGE. 52280304Sjkim * 5355714Skris * The licence and distribution terms for any publically available version or 5455714Skris * derivative of this code cannot be changed. i.e. this code cannot simply be 5555714Skris * copied and put under another distribution licence 5655714Skris * [including the GNU Public Licence.] 5755714Skris */ 5855714Skris 5955714Skris#ifndef HEADER_DES_LOCL_H 60280304Sjkim# define HEADER_DES_LOCL_H 6155714Skris 62280304Sjkim# include <openssl/e_os2.h> 63109998Smarkm 64280304Sjkim# if defined(OPENSSL_SYS_WIN32) 65280304Sjkim# ifndef OPENSSL_SYS_MSDOS 66280304Sjkim# define OPENSSL_SYS_MSDOS 67280304Sjkim# endif 68280304Sjkim# endif 6955714Skris 70280304Sjkim# include <stdio.h> 71280304Sjkim# include <stdlib.h> 7255714Skris 73280304Sjkim# ifndef OPENSSL_SYS_MSDOS 74280304Sjkim# if !defined(OPENSSL_SYS_VMS) || defined(__DECC) 75280304Sjkim# ifdef OPENSSL_UNISTD 76280304Sjkim# include OPENSSL_UNISTD 77280304Sjkim# else 78280304Sjkim# include <unistd.h> 79280304Sjkim# endif 80280304Sjkim# include <math.h> 81280304Sjkim# endif 82280304Sjkim# endif 83280304Sjkim# include <openssl/des.h> 8455714Skris 85280304Sjkim# ifdef OPENSSL_SYS_MSDOS /* Visual C++ 2.1 (Windows NT/95) */ 86280304Sjkim# include <stdlib.h> 87280304Sjkim# include <errno.h> 88280304Sjkim# include <time.h> 89280304Sjkim# include <io.h> 90280304Sjkim# endif 9155714Skris 92280304Sjkim# if defined(__STDC__) || defined(OPENSSL_SYS_VMS) || defined(M_XENIX) || defined(OPENSSL_SYS_MSDOS) 93280304Sjkim# include <string.h> 94280304Sjkim# endif 9555714Skris 96280304Sjkim# ifdef OPENSSL_BUILD_SHLIBCRYPTO 97280304Sjkim# undef OPENSSL_EXTERN 98280304Sjkim# define OPENSSL_EXTERN OPENSSL_EXPORT 99280304Sjkim# endif 100109998Smarkm 101280304Sjkim# define ITERATIONS 16 102280304Sjkim# define HALF_ITERATIONS 8 10355714Skris 10455714Skris/* used in des_read and des_write */ 105280304Sjkim# define MAXWRITE (1024*16) 106280304Sjkim# define BSIZE (MAXWRITE+4) 10755714Skris 108280304Sjkim# define c2l(c,l) (l =((DES_LONG)(*((c)++))) , \ 109280304Sjkim l|=((DES_LONG)(*((c)++)))<< 8L, \ 110280304Sjkim l|=((DES_LONG)(*((c)++)))<<16L, \ 111280304Sjkim l|=((DES_LONG)(*((c)++)))<<24L) 11255714Skris 11355714Skris/* NOTE - c is not incremented as per c2l */ 114280304Sjkim# define c2ln(c,l1,l2,n) { \ 115280304Sjkim c+=n; \ 116280304Sjkim l1=l2=0; \ 117280304Sjkim switch (n) { \ 118280304Sjkim case 8: l2 =((DES_LONG)(*(--(c))))<<24L; \ 119280304Sjkim case 7: l2|=((DES_LONG)(*(--(c))))<<16L; \ 120280304Sjkim case 6: l2|=((DES_LONG)(*(--(c))))<< 8L; \ 121280304Sjkim case 5: l2|=((DES_LONG)(*(--(c)))); \ 122280304Sjkim case 4: l1 =((DES_LONG)(*(--(c))))<<24L; \ 123280304Sjkim case 3: l1|=((DES_LONG)(*(--(c))))<<16L; \ 124280304Sjkim case 2: l1|=((DES_LONG)(*(--(c))))<< 8L; \ 125280304Sjkim case 1: l1|=((DES_LONG)(*(--(c)))); \ 126280304Sjkim } \ 127280304Sjkim } 12855714Skris 129280304Sjkim# define l2c(l,c) (*((c)++)=(unsigned char)(((l) )&0xff), \ 130280304Sjkim *((c)++)=(unsigned char)(((l)>> 8L)&0xff), \ 131280304Sjkim *((c)++)=(unsigned char)(((l)>>16L)&0xff), \ 132280304Sjkim *((c)++)=(unsigned char)(((l)>>24L)&0xff)) 13355714Skris 134280304Sjkim/* 135280304Sjkim * replacements for htonl and ntohl since I have no idea what to do when 136280304Sjkim * faced with machines with 8 byte longs. 137280304Sjkim */ 138280304Sjkim# define HDRSIZE 4 13955714Skris 140280304Sjkim# define n2l(c,l) (l =((DES_LONG)(*((c)++)))<<24L, \ 141280304Sjkim l|=((DES_LONG)(*((c)++)))<<16L, \ 142280304Sjkim l|=((DES_LONG)(*((c)++)))<< 8L, \ 143280304Sjkim l|=((DES_LONG)(*((c)++)))) 14455714Skris 145280304Sjkim# define l2n(l,c) (*((c)++)=(unsigned char)(((l)>>24L)&0xff), \ 146280304Sjkim *((c)++)=(unsigned char)(((l)>>16L)&0xff), \ 147280304Sjkim *((c)++)=(unsigned char)(((l)>> 8L)&0xff), \ 148280304Sjkim *((c)++)=(unsigned char)(((l) )&0xff)) 14955714Skris 15055714Skris/* NOTE - c is not incremented as per l2c */ 151280304Sjkim# define l2cn(l1,l2,c,n) { \ 152280304Sjkim c+=n; \ 153280304Sjkim switch (n) { \ 154280304Sjkim case 8: *(--(c))=(unsigned char)(((l2)>>24L)&0xff); \ 155280304Sjkim case 7: *(--(c))=(unsigned char)(((l2)>>16L)&0xff); \ 156280304Sjkim case 6: *(--(c))=(unsigned char)(((l2)>> 8L)&0xff); \ 157280304Sjkim case 5: *(--(c))=(unsigned char)(((l2) )&0xff); \ 158280304Sjkim case 4: *(--(c))=(unsigned char)(((l1)>>24L)&0xff); \ 159280304Sjkim case 3: *(--(c))=(unsigned char)(((l1)>>16L)&0xff); \ 160280304Sjkim case 2: *(--(c))=(unsigned char)(((l1)>> 8L)&0xff); \ 161280304Sjkim case 1: *(--(c))=(unsigned char)(((l1) )&0xff); \ 162280304Sjkim } \ 163280304Sjkim } 16455714Skris 165280304Sjkim# if (defined(OPENSSL_SYS_WIN32) && defined(_MSC_VER)) || defined(__ICC) 166280304Sjkim# define ROTATE(a,n) (_lrotr(a,n)) 167280304Sjkim# elif defined(__GNUC__) && __GNUC__>=2 && !defined(__STRICT_ANSI__) && !defined(OPENSSL_NO_ASM) && !defined(OPENSSL_NO_INLINE_ASM) && !defined(PEDANTIC) 168280304Sjkim# if defined(__i386) || defined(__i386__) || defined(__x86_64) || defined(__x86_64__) 169280304Sjkim# define ROTATE(a,n) ({ register unsigned int ret; \ 170280304Sjkim asm ("rorl %1,%0" \ 171280304Sjkim : "=r"(ret) \ 172280304Sjkim : "I"(n),"0"(a) \ 173280304Sjkim : "cc"); \ 174280304Sjkim ret; \ 175280304Sjkim }) 176280304Sjkim# endif 177109998Smarkm# endif 178280304Sjkim# ifndef ROTATE 179280304Sjkim# define ROTATE(a,n) (((a)>>(n))+((a)<<(32-(n)))) 180280304Sjkim# endif 18155714Skris 182280304Sjkim/* 183280304Sjkim * Don't worry about the LOAD_DATA() stuff, that is used by fcrypt() to add 184280304Sjkim * it's little bit to the front 185280304Sjkim */ 18655714Skris 187280304Sjkim# ifdef DES_FCRYPT 18855714Skris 189280304Sjkim# define LOAD_DATA_tmp(R,S,u,t,E0,E1) \ 190280304Sjkim { DES_LONG tmp; LOAD_DATA(R,S,u,t,E0,E1,tmp); } 19155714Skris 192280304Sjkim# define LOAD_DATA(R,S,u,t,E0,E1,tmp) \ 193280304Sjkim t=R^(R>>16L); \ 194280304Sjkim u=t&E0; t&=E1; \ 195280304Sjkim tmp=(u<<16); u^=R^s[S ]; u^=tmp; \ 196280304Sjkim tmp=(t<<16); t^=R^s[S+1]; t^=tmp 197280304Sjkim# else 198280304Sjkim# define LOAD_DATA_tmp(a,b,c,d,e,f) LOAD_DATA(a,b,c,d,e,f,g) 199280304Sjkim# define LOAD_DATA(R,S,u,t,E0,E1,tmp) \ 200280304Sjkim u=R^s[S ]; \ 201280304Sjkim t=R^s[S+1] 202280304Sjkim# endif 20355714Skris 204280304Sjkim/* 205280304Sjkim * The changes to this macro may help or hinder, depending on the compiler 206280304Sjkim * and the architecture. gcc2 always seems to do well :-). Inspired by Dana 207280304Sjkim * How <how@isl.stanford.edu> DO NOT use the alternative version on machines 208280304Sjkim * with 8 byte longs. It does not seem to work on the Alpha, even when 209280304Sjkim * DES_LONG is 4 bytes, probably an issue of accessing non-word aligned 210280304Sjkim * objects :-( 211280304Sjkim */ 212280304Sjkim# ifdef DES_PTR 21355714Skris 214280304Sjkim/* 215280304Sjkim * It recently occurred to me that 0^0^0^0^0^0^0 == 0, so there is no reason 216280304Sjkim * to not xor all the sub items together. This potentially saves a register 217280304Sjkim * since things can be xored directly into L 218280304Sjkim */ 21955714Skris 220280304Sjkim# if defined(DES_RISC1) || defined(DES_RISC2) 221280304Sjkim# ifdef DES_RISC1 222280304Sjkim# define D_ENCRYPT(LL,R,S) { \ 223280304Sjkim unsigned int u1,u2,u3; \ 224280304Sjkim LOAD_DATA(R,S,u,t,E0,E1,u1); \ 225280304Sjkim u2=(int)u>>8L; \ 226280304Sjkim u1=(int)u&0xfc; \ 227280304Sjkim u2&=0xfc; \ 228280304Sjkim t=ROTATE(t,4); \ 229280304Sjkim u>>=16L; \ 230280304Sjkim LL^= *(const DES_LONG *)(des_SP +u1); \ 231280304Sjkim LL^= *(const DES_LONG *)(des_SP+0x200+u2); \ 232280304Sjkim u3=(int)(u>>8L); \ 233280304Sjkim u1=(int)u&0xfc; \ 234280304Sjkim u3&=0xfc; \ 235280304Sjkim LL^= *(const DES_LONG *)(des_SP+0x400+u1); \ 236280304Sjkim LL^= *(const DES_LONG *)(des_SP+0x600+u3); \ 237280304Sjkim u2=(int)t>>8L; \ 238280304Sjkim u1=(int)t&0xfc; \ 239280304Sjkim u2&=0xfc; \ 240280304Sjkim t>>=16L; \ 241280304Sjkim LL^= *(const DES_LONG *)(des_SP+0x100+u1); \ 242280304Sjkim LL^= *(const DES_LONG *)(des_SP+0x300+u2); \ 243280304Sjkim u3=(int)t>>8L; \ 244280304Sjkim u1=(int)t&0xfc; \ 245280304Sjkim u3&=0xfc; \ 246280304Sjkim LL^= *(const DES_LONG *)(des_SP+0x500+u1); \ 247280304Sjkim LL^= *(const DES_LONG *)(des_SP+0x700+u3); } 248280304Sjkim# endif 249280304Sjkim# ifdef DES_RISC2 250280304Sjkim# define D_ENCRYPT(LL,R,S) { \ 251280304Sjkim unsigned int u1,u2,s1,s2; \ 252280304Sjkim LOAD_DATA(R,S,u,t,E0,E1,u1); \ 253280304Sjkim u2=(int)u>>8L; \ 254280304Sjkim u1=(int)u&0xfc; \ 255280304Sjkim u2&=0xfc; \ 256280304Sjkim t=ROTATE(t,4); \ 257280304Sjkim LL^= *(const DES_LONG *)(des_SP +u1); \ 258280304Sjkim LL^= *(const DES_LONG *)(des_SP+0x200+u2); \ 259280304Sjkim s1=(int)(u>>16L); \ 260280304Sjkim s2=(int)(u>>24L); \ 261280304Sjkim s1&=0xfc; \ 262280304Sjkim s2&=0xfc; \ 263280304Sjkim LL^= *(const DES_LONG *)(des_SP+0x400+s1); \ 264280304Sjkim LL^= *(const DES_LONG *)(des_SP+0x600+s2); \ 265280304Sjkim u2=(int)t>>8L; \ 266280304Sjkim u1=(int)t&0xfc; \ 267280304Sjkim u2&=0xfc; \ 268280304Sjkim LL^= *(const DES_LONG *)(des_SP+0x100+u1); \ 269280304Sjkim LL^= *(const DES_LONG *)(des_SP+0x300+u2); \ 270280304Sjkim s1=(int)(t>>16L); \ 271280304Sjkim s2=(int)(t>>24L); \ 272280304Sjkim s1&=0xfc; \ 273280304Sjkim s2&=0xfc; \ 274280304Sjkim LL^= *(const DES_LONG *)(des_SP+0x500+s1); \ 275280304Sjkim LL^= *(const DES_LONG *)(des_SP+0x700+s2); } 276280304Sjkim# endif 277280304Sjkim# else 278280304Sjkim# define D_ENCRYPT(LL,R,S) { \ 279280304Sjkim LOAD_DATA_tmp(R,S,u,t,E0,E1); \ 280280304Sjkim t=ROTATE(t,4); \ 281280304Sjkim LL^= \ 282280304Sjkim *(const DES_LONG *)(des_SP +((u )&0xfc))^ \ 283280304Sjkim *(const DES_LONG *)(des_SP+0x200+((u>> 8L)&0xfc))^ \ 284280304Sjkim *(const DES_LONG *)(des_SP+0x400+((u>>16L)&0xfc))^ \ 285280304Sjkim *(const DES_LONG *)(des_SP+0x600+((u>>24L)&0xfc))^ \ 286280304Sjkim *(const DES_LONG *)(des_SP+0x100+((t )&0xfc))^ \ 287280304Sjkim *(const DES_LONG *)(des_SP+0x300+((t>> 8L)&0xfc))^ \ 288280304Sjkim *(const DES_LONG *)(des_SP+0x500+((t>>16L)&0xfc))^ \ 289280304Sjkim *(const DES_LONG *)(des_SP+0x700+((t>>24L)&0xfc)); } 290280304Sjkim# endif 29155714Skris 292280304Sjkim# else /* original version */ 29355714Skris 294280304Sjkim# if defined(DES_RISC1) || defined(DES_RISC2) 295280304Sjkim# ifdef DES_RISC1 296280304Sjkim# define D_ENCRYPT(LL,R,S) {\ 297280304Sjkim unsigned int u1,u2,u3; \ 298280304Sjkim LOAD_DATA(R,S,u,t,E0,E1,u1); \ 299280304Sjkim u>>=2L; \ 300280304Sjkim t=ROTATE(t,6); \ 301280304Sjkim u2=(int)u>>8L; \ 302280304Sjkim u1=(int)u&0x3f; \ 303280304Sjkim u2&=0x3f; \ 304280304Sjkim u>>=16L; \ 305280304Sjkim LL^=DES_SPtrans[0][u1]; \ 306280304Sjkim LL^=DES_SPtrans[2][u2]; \ 307280304Sjkim u3=(int)u>>8L; \ 308280304Sjkim u1=(int)u&0x3f; \ 309280304Sjkim u3&=0x3f; \ 310280304Sjkim LL^=DES_SPtrans[4][u1]; \ 311280304Sjkim LL^=DES_SPtrans[6][u3]; \ 312280304Sjkim u2=(int)t>>8L; \ 313280304Sjkim u1=(int)t&0x3f; \ 314280304Sjkim u2&=0x3f; \ 315280304Sjkim t>>=16L; \ 316280304Sjkim LL^=DES_SPtrans[1][u1]; \ 317280304Sjkim LL^=DES_SPtrans[3][u2]; \ 318280304Sjkim u3=(int)t>>8L; \ 319280304Sjkim u1=(int)t&0x3f; \ 320280304Sjkim u3&=0x3f; \ 321280304Sjkim LL^=DES_SPtrans[5][u1]; \ 322280304Sjkim LL^=DES_SPtrans[7][u3]; } 323280304Sjkim# endif 324280304Sjkim# ifdef DES_RISC2 325280304Sjkim# define D_ENCRYPT(LL,R,S) {\ 326280304Sjkim unsigned int u1,u2,s1,s2; \ 327280304Sjkim LOAD_DATA(R,S,u,t,E0,E1,u1); \ 328280304Sjkim u>>=2L; \ 329280304Sjkim t=ROTATE(t,6); \ 330280304Sjkim u2=(int)u>>8L; \ 331280304Sjkim u1=(int)u&0x3f; \ 332280304Sjkim u2&=0x3f; \ 333280304Sjkim LL^=DES_SPtrans[0][u1]; \ 334280304Sjkim LL^=DES_SPtrans[2][u2]; \ 335280304Sjkim s1=(int)u>>16L; \ 336280304Sjkim s2=(int)u>>24L; \ 337280304Sjkim s1&=0x3f; \ 338280304Sjkim s2&=0x3f; \ 339280304Sjkim LL^=DES_SPtrans[4][s1]; \ 340280304Sjkim LL^=DES_SPtrans[6][s2]; \ 341280304Sjkim u2=(int)t>>8L; \ 342280304Sjkim u1=(int)t&0x3f; \ 343280304Sjkim u2&=0x3f; \ 344280304Sjkim LL^=DES_SPtrans[1][u1]; \ 345280304Sjkim LL^=DES_SPtrans[3][u2]; \ 346280304Sjkim s1=(int)t>>16; \ 347280304Sjkim s2=(int)t>>24L; \ 348280304Sjkim s1&=0x3f; \ 349280304Sjkim s2&=0x3f; \ 350280304Sjkim LL^=DES_SPtrans[5][s1]; \ 351280304Sjkim LL^=DES_SPtrans[7][s2]; } 352280304Sjkim# endif 35355714Skris 354280304Sjkim# else 35555714Skris 356280304Sjkim# define D_ENCRYPT(LL,R,S) {\ 357280304Sjkim LOAD_DATA_tmp(R,S,u,t,E0,E1); \ 358280304Sjkim t=ROTATE(t,4); \ 359280304Sjkim LL^=\ 360280304Sjkim DES_SPtrans[0][(u>> 2L)&0x3f]^ \ 361280304Sjkim DES_SPtrans[2][(u>>10L)&0x3f]^ \ 362280304Sjkim DES_SPtrans[4][(u>>18L)&0x3f]^ \ 363280304Sjkim DES_SPtrans[6][(u>>26L)&0x3f]^ \ 364280304Sjkim DES_SPtrans[1][(t>> 2L)&0x3f]^ \ 365280304Sjkim DES_SPtrans[3][(t>>10L)&0x3f]^ \ 366280304Sjkim DES_SPtrans[5][(t>>18L)&0x3f]^ \ 367280304Sjkim DES_SPtrans[7][(t>>26L)&0x3f]; } 368280304Sjkim# endif 369280304Sjkim# endif 37055714Skris 371280304Sjkim /*- 372280304Sjkim * IP and FP 373280304Sjkim * The problem is more of a geometric problem that random bit fiddling. 374280304Sjkim 0 1 2 3 4 5 6 7 62 54 46 38 30 22 14 6 375280304Sjkim 8 9 10 11 12 13 14 15 60 52 44 36 28 20 12 4 376280304Sjkim 16 17 18 19 20 21 22 23 58 50 42 34 26 18 10 2 377280304Sjkim 24 25 26 27 28 29 30 31 to 56 48 40 32 24 16 8 0 37855714Skris 379280304Sjkim 32 33 34 35 36 37 38 39 63 55 47 39 31 23 15 7 380280304Sjkim 40 41 42 43 44 45 46 47 61 53 45 37 29 21 13 5 381280304Sjkim 48 49 50 51 52 53 54 55 59 51 43 35 27 19 11 3 382280304Sjkim 56 57 58 59 60 61 62 63 57 49 41 33 25 17 9 1 38355714Skris 384280304Sjkim The output has been subject to swaps of the form 385280304Sjkim 0 1 -> 3 1 but the odd and even bits have been put into 386280304Sjkim 2 3 2 0 387280304Sjkim different words. The main trick is to remember that 388280304Sjkim t=((l>>size)^r)&(mask); 389280304Sjkim r^=t; 390280304Sjkim l^=(t<<size); 391280304Sjkim can be used to swap and move bits between words. 39255714Skris 393280304Sjkim So l = 0 1 2 3 r = 16 17 18 19 394280304Sjkim 4 5 6 7 20 21 22 23 395280304Sjkim 8 9 10 11 24 25 26 27 396280304Sjkim 12 13 14 15 28 29 30 31 397280304Sjkim becomes (for size == 2 and mask == 0x3333) 398280304Sjkim t = 2^16 3^17 -- -- l = 0 1 16 17 r = 2 3 18 19 399280304Sjkim 6^20 7^21 -- -- 4 5 20 21 6 7 22 23 400280304Sjkim 10^24 11^25 -- -- 8 9 24 25 10 11 24 25 401280304Sjkim 14^28 15^29 -- -- 12 13 28 29 14 15 28 29 40255714Skris 403280304Sjkim Thanks for hints from Richard Outerbridge - he told me IP&FP 404280304Sjkim could be done in 15 xor, 10 shifts and 5 ands. 405280304Sjkim When I finally started to think of the problem in 2D 406280304Sjkim I first got ~42 operations without xors. When I remembered 407280304Sjkim how to use xors :-) I got it to its final state. 408280304Sjkim */ 409280304Sjkim# define PERM_OP(a,b,t,n,m) ((t)=((((a)>>(n))^(b))&(m)),\ 410280304Sjkim (b)^=(t),\ 411280304Sjkim (a)^=((t)<<(n))) 41255714Skris 413280304Sjkim# define IP(l,r) \ 414280304Sjkim { \ 415280304Sjkim register DES_LONG tt; \ 416280304Sjkim PERM_OP(r,l,tt, 4,0x0f0f0f0fL); \ 417280304Sjkim PERM_OP(l,r,tt,16,0x0000ffffL); \ 418280304Sjkim PERM_OP(r,l,tt, 2,0x33333333L); \ 419280304Sjkim PERM_OP(l,r,tt, 8,0x00ff00ffL); \ 420280304Sjkim PERM_OP(r,l,tt, 1,0x55555555L); \ 421280304Sjkim } 42255714Skris 423280304Sjkim# define FP(l,r) \ 424280304Sjkim { \ 425280304Sjkim register DES_LONG tt; \ 426280304Sjkim PERM_OP(l,r,tt, 1,0x55555555L); \ 427280304Sjkim PERM_OP(r,l,tt, 8,0x00ff00ffL); \ 428280304Sjkim PERM_OP(l,r,tt, 2,0x33333333L); \ 429280304Sjkim PERM_OP(r,l,tt,16,0x0000ffffL); \ 430280304Sjkim PERM_OP(l,r,tt, 4,0x0f0f0f0fL); \ 431280304Sjkim } 43255714Skris 433160814Ssimonextern const DES_LONG DES_SPtrans[8][64]; 43455714Skris 435280304Sjkimvoid fcrypt_body(DES_LONG *out, DES_key_schedule *ks, 436280304Sjkim DES_LONG Eswap0, DES_LONG Eswap1); 437238405Sjkim 438280304Sjkim# ifdef OPENSSL_SMALL_FOOTPRINT 439280304Sjkim# undef DES_UNROLL 440280304Sjkim# endif 44155714Skris#endif 442