[331] | 1 | /*
|
---|
| 2 | * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
|
---|
| 3 | *
|
---|
| 4 | * Licensed under the OpenSSL license (the "License"). You may not use
|
---|
| 5 | * this file except in compliance with the License. You can obtain a copy
|
---|
| 6 | * in the file LICENSE in the source distribution or at
|
---|
| 7 | * https://www.openssl.org/source/license.html
|
---|
| 8 | */
|
---|
| 9 |
|
---|
| 10 | #ifndef HEADER_DES_LOCL_H
|
---|
| 11 | # define HEADER_DES_LOCL_H
|
---|
| 12 |
|
---|
| 13 | # include <openssl/e_os2.h>
|
---|
| 14 |
|
---|
| 15 | # include <stdio.h>
|
---|
| 16 | # include <stdlib.h>
|
---|
| 17 | # include <string.h>
|
---|
| 18 |
|
---|
| 19 | # include <openssl/des.h>
|
---|
| 20 |
|
---|
| 21 | # ifdef OPENSSL_BUILD_SHLIBCRYPTO
|
---|
| 22 | # undef OPENSSL_EXTERN
|
---|
| 23 | # define OPENSSL_EXTERN OPENSSL_EXPORT
|
---|
| 24 | # endif
|
---|
| 25 |
|
---|
| 26 | # define ITERATIONS 16
|
---|
| 27 | # define HALF_ITERATIONS 8
|
---|
| 28 |
|
---|
| 29 | /* used in des_read and des_write */
|
---|
| 30 | # define MAXWRITE (1024*16)
|
---|
| 31 | # define BSIZE (MAXWRITE+4)
|
---|
| 32 |
|
---|
| 33 | # define c2l(c,l) (l =((DES_LONG)(*((c)++))) , \
|
---|
| 34 | l|=((DES_LONG)(*((c)++)))<< 8L, \
|
---|
| 35 | l|=((DES_LONG)(*((c)++)))<<16L, \
|
---|
| 36 | l|=((DES_LONG)(*((c)++)))<<24L)
|
---|
| 37 |
|
---|
| 38 | /* NOTE - c is not incremented as per c2l */
|
---|
| 39 | # define c2ln(c,l1,l2,n) { \
|
---|
| 40 | c+=n; \
|
---|
| 41 | l1=l2=0; \
|
---|
| 42 | switch (n) { \
|
---|
| 43 | case 8: l2 =((DES_LONG)(*(--(c))))<<24L; \
|
---|
| 44 | case 7: l2|=((DES_LONG)(*(--(c))))<<16L; \
|
---|
| 45 | case 6: l2|=((DES_LONG)(*(--(c))))<< 8L; \
|
---|
| 46 | case 5: l2|=((DES_LONG)(*(--(c)))); \
|
---|
| 47 | case 4: l1 =((DES_LONG)(*(--(c))))<<24L; \
|
---|
| 48 | case 3: l1|=((DES_LONG)(*(--(c))))<<16L; \
|
---|
| 49 | case 2: l1|=((DES_LONG)(*(--(c))))<< 8L; \
|
---|
| 50 | case 1: l1|=((DES_LONG)(*(--(c)))); \
|
---|
| 51 | } \
|
---|
| 52 | }
|
---|
| 53 |
|
---|
| 54 | # define l2c(l,c) (*((c)++)=(unsigned char)(((l) )&0xff), \
|
---|
| 55 | *((c)++)=(unsigned char)(((l)>> 8L)&0xff), \
|
---|
| 56 | *((c)++)=(unsigned char)(((l)>>16L)&0xff), \
|
---|
| 57 | *((c)++)=(unsigned char)(((l)>>24L)&0xff))
|
---|
| 58 |
|
---|
| 59 | /*
|
---|
| 60 | * replacements for htonl and ntohl since I have no idea what to do when
|
---|
| 61 | * faced with machines with 8 byte longs.
|
---|
| 62 | */
|
---|
| 63 | # define HDRSIZE 4
|
---|
| 64 |
|
---|
| 65 | # define n2l(c,l) (l =((DES_LONG)(*((c)++)))<<24L, \
|
---|
| 66 | l|=((DES_LONG)(*((c)++)))<<16L, \
|
---|
| 67 | l|=((DES_LONG)(*((c)++)))<< 8L, \
|
---|
| 68 | l|=((DES_LONG)(*((c)++))))
|
---|
| 69 |
|
---|
| 70 | # define l2n(l,c) (*((c)++)=(unsigned char)(((l)>>24L)&0xff), \
|
---|
| 71 | *((c)++)=(unsigned char)(((l)>>16L)&0xff), \
|
---|
| 72 | *((c)++)=(unsigned char)(((l)>> 8L)&0xff), \
|
---|
| 73 | *((c)++)=(unsigned char)(((l) )&0xff))
|
---|
| 74 |
|
---|
| 75 | /* NOTE - c is not incremented as per l2c */
|
---|
| 76 | # define l2cn(l1,l2,c,n) { \
|
---|
| 77 | c+=n; \
|
---|
| 78 | switch (n) { \
|
---|
| 79 | case 8: *(--(c))=(unsigned char)(((l2)>>24L)&0xff); \
|
---|
| 80 | case 7: *(--(c))=(unsigned char)(((l2)>>16L)&0xff); \
|
---|
| 81 | case 6: *(--(c))=(unsigned char)(((l2)>> 8L)&0xff); \
|
---|
| 82 | case 5: *(--(c))=(unsigned char)(((l2) )&0xff); \
|
---|
| 83 | case 4: *(--(c))=(unsigned char)(((l1)>>24L)&0xff); \
|
---|
| 84 | case 3: *(--(c))=(unsigned char)(((l1)>>16L)&0xff); \
|
---|
| 85 | case 2: *(--(c))=(unsigned char)(((l1)>> 8L)&0xff); \
|
---|
| 86 | case 1: *(--(c))=(unsigned char)(((l1) )&0xff); \
|
---|
| 87 | } \
|
---|
| 88 | }
|
---|
| 89 |
|
---|
| 90 | # if (defined(OPENSSL_SYS_WIN32) && defined(_MSC_VER))
|
---|
| 91 | # define ROTATE(a,n) (_lrotr(a,n))
|
---|
| 92 | # elif defined(__ICC)
|
---|
| 93 | # define ROTATE(a,n) (_rotr(a,n))
|
---|
| 94 | # elif defined(__GNUC__) && __GNUC__>=2 && !defined(__STRICT_ANSI__) && !defined(OPENSSL_NO_ASM) && !defined(OPENSSL_NO_INLINE_ASM) && !defined(PEDANTIC)
|
---|
| 95 | # if defined(__i386) || defined(__i386__) || defined(__x86_64) || defined(__x86_64__)
|
---|
| 96 | # define ROTATE(a,n) ({ register unsigned int ret; \
|
---|
| 97 | asm ("rorl %1,%0" \
|
---|
| 98 | : "=r"(ret) \
|
---|
| 99 | : "I"(n),"0"(a) \
|
---|
| 100 | : "cc"); \
|
---|
| 101 | ret; \
|
---|
| 102 | })
|
---|
| 103 | # endif
|
---|
| 104 | # endif
|
---|
| 105 | # ifndef ROTATE
|
---|
| 106 | # define ROTATE(a,n) (((a)>>(n))+((a)<<(32-(n))))
|
---|
| 107 | # endif
|
---|
| 108 |
|
---|
| 109 | /*
|
---|
| 110 | * Don't worry about the LOAD_DATA() stuff, that is used by fcrypt() to add
|
---|
| 111 | * it's little bit to the front
|
---|
| 112 | */
|
---|
| 113 |
|
---|
| 114 | # ifdef DES_FCRYPT
|
---|
| 115 |
|
---|
| 116 | # define LOAD_DATA_tmp(R,S,u,t,E0,E1) \
|
---|
| 117 | { DES_LONG tmp; LOAD_DATA(R,S,u,t,E0,E1,tmp); }
|
---|
| 118 |
|
---|
| 119 | # define LOAD_DATA(R,S,u,t,E0,E1,tmp) \
|
---|
| 120 | t=R^(R>>16L); \
|
---|
| 121 | u=t&E0; t&=E1; \
|
---|
| 122 | tmp=(u<<16); u^=R^s[S ]; u^=tmp; \
|
---|
| 123 | tmp=(t<<16); t^=R^s[S+1]; t^=tmp
|
---|
| 124 | # else
|
---|
| 125 | # define LOAD_DATA_tmp(a,b,c,d,e,f) LOAD_DATA(a,b,c,d,e,f,g)
|
---|
| 126 | # define LOAD_DATA(R,S,u,t,E0,E1,tmp) \
|
---|
| 127 | u=R^s[S ]; \
|
---|
| 128 | t=R^s[S+1]
|
---|
| 129 | # endif
|
---|
| 130 |
|
---|
| 131 | /*
|
---|
| 132 | * It recently occurred to me that 0^0^0^0^0^0^0 == 0, so there is no reason
|
---|
| 133 | * to not xor all the sub items together. This potentially saves a register
|
---|
| 134 | * since things can be xored directly into L
|
---|
| 135 | */
|
---|
| 136 |
|
---|
| 137 | # define D_ENCRYPT(LL,R,S) { \
|
---|
| 138 | LOAD_DATA_tmp(R,S,u,t,E0,E1); \
|
---|
| 139 | t=ROTATE(t,4); \
|
---|
| 140 | LL^= \
|
---|
| 141 | DES_SPtrans[0][(u>> 2L)&0x3f]^ \
|
---|
| 142 | DES_SPtrans[2][(u>>10L)&0x3f]^ \
|
---|
| 143 | DES_SPtrans[4][(u>>18L)&0x3f]^ \
|
---|
| 144 | DES_SPtrans[6][(u>>26L)&0x3f]^ \
|
---|
| 145 | DES_SPtrans[1][(t>> 2L)&0x3f]^ \
|
---|
| 146 | DES_SPtrans[3][(t>>10L)&0x3f]^ \
|
---|
| 147 | DES_SPtrans[5][(t>>18L)&0x3f]^ \
|
---|
| 148 | DES_SPtrans[7][(t>>26L)&0x3f]; }
|
---|
| 149 |
|
---|
| 150 | /*-
|
---|
| 151 | * IP and FP
|
---|
| 152 | * The problem is more of a geometric problem that random bit fiddling.
|
---|
| 153 | 0 1 2 3 4 5 6 7 62 54 46 38 30 22 14 6
|
---|
| 154 | 8 9 10 11 12 13 14 15 60 52 44 36 28 20 12 4
|
---|
| 155 | 16 17 18 19 20 21 22 23 58 50 42 34 26 18 10 2
|
---|
| 156 | 24 25 26 27 28 29 30 31 to 56 48 40 32 24 16 8 0
|
---|
| 157 |
|
---|
| 158 | 32 33 34 35 36 37 38 39 63 55 47 39 31 23 15 7
|
---|
| 159 | 40 41 42 43 44 45 46 47 61 53 45 37 29 21 13 5
|
---|
| 160 | 48 49 50 51 52 53 54 55 59 51 43 35 27 19 11 3
|
---|
| 161 | 56 57 58 59 60 61 62 63 57 49 41 33 25 17 9 1
|
---|
| 162 |
|
---|
| 163 | The output has been subject to swaps of the form
|
---|
| 164 | 0 1 -> 3 1 but the odd and even bits have been put into
|
---|
| 165 | 2 3 2 0
|
---|
| 166 | different words. The main trick is to remember that
|
---|
| 167 | t=((l>>size)^r)&(mask);
|
---|
| 168 | r^=t;
|
---|
| 169 | l^=(t<<size);
|
---|
| 170 | can be used to swap and move bits between words.
|
---|
| 171 |
|
---|
| 172 | So l = 0 1 2 3 r = 16 17 18 19
|
---|
| 173 | 4 5 6 7 20 21 22 23
|
---|
| 174 | 8 9 10 11 24 25 26 27
|
---|
| 175 | 12 13 14 15 28 29 30 31
|
---|
| 176 | becomes (for size == 2 and mask == 0x3333)
|
---|
| 177 | t = 2^16 3^17 -- -- l = 0 1 16 17 r = 2 3 18 19
|
---|
| 178 | 6^20 7^21 -- -- 4 5 20 21 6 7 22 23
|
---|
| 179 | 10^24 11^25 -- -- 8 9 24 25 10 11 24 25
|
---|
| 180 | 14^28 15^29 -- -- 12 13 28 29 14 15 28 29
|
---|
| 181 |
|
---|
| 182 | Thanks for hints from Richard Outerbridge - he told me IP&FP
|
---|
| 183 | could be done in 15 xor, 10 shifts and 5 ands.
|
---|
| 184 | When I finally started to think of the problem in 2D
|
---|
| 185 | I first got ~42 operations without xors. When I remembered
|
---|
| 186 | how to use xors :-) I got it to its final state.
|
---|
| 187 | */
|
---|
| 188 | # define PERM_OP(a,b,t,n,m) ((t)=((((a)>>(n))^(b))&(m)),\
|
---|
| 189 | (b)^=(t),\
|
---|
| 190 | (a)^=((t)<<(n)))
|
---|
| 191 |
|
---|
| 192 | # define IP(l,r) \
|
---|
| 193 | { \
|
---|
| 194 | register DES_LONG tt; \
|
---|
| 195 | PERM_OP(r,l,tt, 4,0x0f0f0f0fL); \
|
---|
| 196 | PERM_OP(l,r,tt,16,0x0000ffffL); \
|
---|
| 197 | PERM_OP(r,l,tt, 2,0x33333333L); \
|
---|
| 198 | PERM_OP(l,r,tt, 8,0x00ff00ffL); \
|
---|
| 199 | PERM_OP(r,l,tt, 1,0x55555555L); \
|
---|
| 200 | }
|
---|
| 201 |
|
---|
| 202 | # define FP(l,r) \
|
---|
| 203 | { \
|
---|
| 204 | register DES_LONG tt; \
|
---|
| 205 | PERM_OP(l,r,tt, 1,0x55555555L); \
|
---|
| 206 | PERM_OP(r,l,tt, 8,0x00ff00ffL); \
|
---|
| 207 | PERM_OP(l,r,tt, 2,0x33333333L); \
|
---|
| 208 | PERM_OP(r,l,tt,16,0x0000ffffL); \
|
---|
| 209 | PERM_OP(l,r,tt, 4,0x0f0f0f0fL); \
|
---|
| 210 | }
|
---|
| 211 |
|
---|
| 212 | extern const DES_LONG DES_SPtrans[8][64];
|
---|
| 213 |
|
---|
| 214 | void fcrypt_body(DES_LONG *out, DES_key_schedule *ks,
|
---|
| 215 | DES_LONG Eswap0, DES_LONG Eswap1);
|
---|
| 216 |
|
---|
| 217 | #endif
|
---|