/* * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved. * * Licensed under the OpenSSL license (the "License"). You may not use * this file except in compliance with the License. You can obtain a copy * in the file LICENSE in the source distribution or at * https://www.openssl.org/source/license.html */ #ifndef HEADER_DES_LOCL_H # define HEADER_DES_LOCL_H # include # include # include # include # include # ifdef OPENSSL_BUILD_SHLIBCRYPTO # undef OPENSSL_EXTERN # define OPENSSL_EXTERN OPENSSL_EXPORT # endif # define ITERATIONS 16 # define HALF_ITERATIONS 8 /* used in des_read and des_write */ # define MAXWRITE (1024*16) # define BSIZE (MAXWRITE+4) # define c2l(c,l) (l =((DES_LONG)(*((c)++))) , \ l|=((DES_LONG)(*((c)++)))<< 8L, \ l|=((DES_LONG)(*((c)++)))<<16L, \ l|=((DES_LONG)(*((c)++)))<<24L) /* NOTE - c is not incremented as per c2l */ # define c2ln(c,l1,l2,n) { \ c+=n; \ l1=l2=0; \ switch (n) { \ case 8: l2 =((DES_LONG)(*(--(c))))<<24L; \ /* fall thru */ \ case 7: l2|=((DES_LONG)(*(--(c))))<<16L; \ /* fall thru */ \ case 6: l2|=((DES_LONG)(*(--(c))))<< 8L; \ /* fall thru */ \ case 5: l2|=((DES_LONG)(*(--(c)))); \ /* fall thru */ \ case 4: l1 =((DES_LONG)(*(--(c))))<<24L; \ /* fall thru */ \ case 3: l1|=((DES_LONG)(*(--(c))))<<16L; \ /* fall thru */ \ case 2: l1|=((DES_LONG)(*(--(c))))<< 8L; \ /* fall thru */ \ case 1: l1|=((DES_LONG)(*(--(c)))); \ } \ } # define l2c(l,c) (*((c)++)=(unsigned char)(((l) )&0xff), \ *((c)++)=(unsigned char)(((l)>> 8L)&0xff), \ *((c)++)=(unsigned char)(((l)>>16L)&0xff), \ *((c)++)=(unsigned char)(((l)>>24L)&0xff)) /* * replacements for htonl and ntohl since I have no idea what to do when * faced with machines with 8 byte longs. */ # define HDRSIZE 4 # define n2l(c,l) (l =((DES_LONG)(*((c)++)))<<24L, \ l|=((DES_LONG)(*((c)++)))<<16L, \ l|=((DES_LONG)(*((c)++)))<< 8L, \ l|=((DES_LONG)(*((c)++)))) # define l2n(l,c) (*((c)++)=(unsigned char)(((l)>>24L)&0xff), \ *((c)++)=(unsigned char)(((l)>>16L)&0xff), \ *((c)++)=(unsigned char)(((l)>> 8L)&0xff), \ *((c)++)=(unsigned char)(((l) )&0xff)) /* NOTE - c is not incremented as per l2c */ # define l2cn(l1,l2,c,n) { \ c+=n; \ switch (n) { \ case 8: *(--(c))=(unsigned char)(((l2)>>24L)&0xff); \ /* fall thru */ \ case 7: *(--(c))=(unsigned char)(((l2)>>16L)&0xff); \ /* fall thru */ \ case 6: *(--(c))=(unsigned char)(((l2)>> 8L)&0xff); \ /* fall thru */ \ case 5: *(--(c))=(unsigned char)(((l2) )&0xff); \ /* fall thru */ \ case 4: *(--(c))=(unsigned char)(((l1)>>24L)&0xff); \ /* fall thru */ \ case 3: *(--(c))=(unsigned char)(((l1)>>16L)&0xff); \ /* fall thru */ \ case 2: *(--(c))=(unsigned char)(((l1)>> 8L)&0xff); \ /* fall thru */ \ case 1: *(--(c))=(unsigned char)(((l1) )&0xff); \ } \ } # if (defined(OPENSSL_SYS_WIN32) && defined(_MSC_VER)) # define ROTATE(a,n) (_lrotr(a,n)) # elif defined(__ICC) # define ROTATE(a,n) (_rotr(a,n)) # elif defined(__GNUC__) && __GNUC__>=2 && !defined(__STRICT_ANSI__) && !defined(OPENSSL_NO_ASM) && !defined(OPENSSL_NO_INLINE_ASM) && !defined(PEDANTIC) # if defined(__i386) || defined(__i386__) || defined(__x86_64) || defined(__x86_64__) # define ROTATE(a,n) ({ register unsigned int ret; \ asm ("rorl %1,%0" \ : "=r"(ret) \ : "I"(n),"0"(a) \ : "cc"); \ ret; \ }) # endif # endif # ifndef ROTATE # define ROTATE(a,n) (((a)>>(n))+((a)<<(32-(n)))) # endif /* * Don't worry about the LOAD_DATA() stuff, that is used by fcrypt() to add * it's little bit to the front */ # ifdef DES_FCRYPT # define LOAD_DATA_tmp(R,S,u,t,E0,E1) \ { DES_LONG tmp; LOAD_DATA(R,S,u,t,E0,E1,tmp); } # define LOAD_DATA(R,S,u,t,E0,E1,tmp) \ t=R^(R>>16L); \ u=t&E0; t&=E1; \ tmp=(u<<16); u^=R^s[S ]; u^=tmp; \ tmp=(t<<16); t^=R^s[S+1]; t^=tmp # else # define LOAD_DATA_tmp(a,b,c,d,e,f) LOAD_DATA(a,b,c,d,e,f,g) # define LOAD_DATA(R,S,u,t,E0,E1,tmp) \ u=R^s[S ]; \ t=R^s[S+1] # endif /* * It recently occurred to me that 0^0^0^0^0^0^0 == 0, so there is no reason * to not xor all the sub items together. This potentially saves a register * since things can be xored directly into L */ # define D_ENCRYPT(LL,R,S) { \ LOAD_DATA_tmp(R,S,u,t,E0,E1); \ t=ROTATE(t,4); \ LL^= \ DES_SPtrans[0][(u>> 2L)&0x3f]^ \ DES_SPtrans[2][(u>>10L)&0x3f]^ \ DES_SPtrans[4][(u>>18L)&0x3f]^ \ DES_SPtrans[6][(u>>26L)&0x3f]^ \ DES_SPtrans[1][(t>> 2L)&0x3f]^ \ DES_SPtrans[3][(t>>10L)&0x3f]^ \ DES_SPtrans[5][(t>>18L)&0x3f]^ \ DES_SPtrans[7][(t>>26L)&0x3f]; } /*- * IP and FP * The problem is more of a geometric problem that random bit fiddling. 0 1 2 3 4 5 6 7 62 54 46 38 30 22 14 6 8 9 10 11 12 13 14 15 60 52 44 36 28 20 12 4 16 17 18 19 20 21 22 23 58 50 42 34 26 18 10 2 24 25 26 27 28 29 30 31 to 56 48 40 32 24 16 8 0 32 33 34 35 36 37 38 39 63 55 47 39 31 23 15 7 40 41 42 43 44 45 46 47 61 53 45 37 29 21 13 5 48 49 50 51 52 53 54 55 59 51 43 35 27 19 11 3 56 57 58 59 60 61 62 63 57 49 41 33 25 17 9 1 The output has been subject to swaps of the form 0 1 -> 3 1 but the odd and even bits have been put into 2 3 2 0 different words. The main trick is to remember that t=((l>>size)^r)&(mask); r^=t; l^=(t<>(n))^(b))&(m)),\ (b)^=(t),\ (a)^=((t)<<(n))) # define IP(l,r) \ { \ register DES_LONG tt; \ PERM_OP(r,l,tt, 4,0x0f0f0f0fL); \ PERM_OP(l,r,tt,16,0x0000ffffL); \ PERM_OP(r,l,tt, 2,0x33333333L); \ PERM_OP(l,r,tt, 8,0x00ff00ffL); \ PERM_OP(r,l,tt, 1,0x55555555L); \ } # define FP(l,r) \ { \ register DES_LONG tt; \ PERM_OP(l,r,tt, 1,0x55555555L); \ PERM_OP(r,l,tt, 8,0x00ff00ffL); \ PERM_OP(l,r,tt, 2,0x33333333L); \ PERM_OP(r,l,tt,16,0x0000ffffL); \ PERM_OP(l,r,tt, 4,0x0f0f0f0fL); \ } extern const DES_LONG DES_SPtrans[8][64]; void fcrypt_body(DES_LONG *out, DES_key_schedule *ks, DES_LONG Eswap0, DES_LONG Eswap1); #endif