openssl/crypto/des/des_locl.h
Richard Levitte c2e4f17c1a Due to an increasing number of clashes between modern OpenSSL and
libdes (which is still used out there) or other des implementations,
the OpenSSL DES functions are renamed to begin with DES_ instead of
des_.  Compatibility routines are provided and declared by including
openssl/des_old.h.  Those declarations are the same as were in des.h
when the OpenSSL project started, which is exactly how libdes looked
at that time, and hopefully still looks today.

The compatibility functions will be removed in some future release, at
the latest in version 1.0.
2001-10-24 21:21:12 +00:00

418 lines
13 KiB
C

/* crypto/des/des_locl.h */
/* Copyright (C) 1995-1997 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.]
*/
#ifndef HEADER_DES_LOCL_H
#define HEADER_DES_LOCL_H
#include <openssl/e_os2.h>
#if defined(OPENSSL_SYS_WIN32) || defined(OPENSSL_SYS_WIN16)
#ifndef OPENSSL_SYS_MSDOS
#define OPENSSL_SYS_MSDOS
#endif
#endif
#include <stdio.h>
#include <stdlib.h>
#ifndef OPENSSL_SYS_MSDOS
#if !defined(OPENSSL_SYS_VMS) || defined(__DECC)
#ifdef OPENSSL_UNISTD
# include OPENSSL_UNISTD
#else
# include <unistd.h>
#endif
#include <math.h>
#endif
#endif
#include <openssl/des.h>
#ifdef OPENSSL_SYS_MSDOS /* Visual C++ 2.1 (Windows NT/95) */
#include <stdlib.h>
#include <errno.h>
#include <time.h>
#include <io.h>
#endif
#if defined(__STDC__) || defined(OPENSSL_SYS_VMS) || defined(M_XENIX) || defined(OPENSSL_SYS_MSDOS)
#include <string.h>
#endif
#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; \
case 7: l2|=((DES_LONG)(*(--(c))))<<16L; \
case 6: l2|=((DES_LONG)(*(--(c))))<< 8L; \
case 5: l2|=((DES_LONG)(*(--(c)))); \
case 4: l1 =((DES_LONG)(*(--(c))))<<24L; \
case 3: l1|=((DES_LONG)(*(--(c))))<<16L; \
case 2: l1|=((DES_LONG)(*(--(c))))<< 8L; \
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); \
case 7: *(--(c))=(unsigned char)(((l2)>>16L)&0xff); \
case 6: *(--(c))=(unsigned char)(((l2)>> 8L)&0xff); \
case 5: *(--(c))=(unsigned char)(((l2) )&0xff); \
case 4: *(--(c))=(unsigned char)(((l1)>>24L)&0xff); \
case 3: *(--(c))=(unsigned char)(((l1)>>16L)&0xff); \
case 2: *(--(c))=(unsigned char)(((l1)>> 8L)&0xff); \
case 1: *(--(c))=(unsigned char)(((l1) )&0xff); \
} \
}
#if defined(OPENSSL_SYS_WIN32) && defined(_MSC_VER)
#define ROTATE(a,n) (_lrotr(a,n))
#else
#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
/* The changes to this macro may help or hinder, depending on the
* compiler and the architecture. gcc2 always seems to do well :-).
* Inspired by Dana How <how@isl.stanford.edu>
* DO NOT use the alternative version on machines with 8 byte longs.
* It does not seem to work on the Alpha, even when DES_LONG is 4
* bytes, probably an issue of accessing non-word aligned objects :-( */
#ifdef DES_PTR
/* 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 */
#if defined(DES_RISC1) || defined(DES_RISC2)
#ifdef DES_RISC1
#define D_ENCRYPT(LL,R,S) { \
unsigned int u1,u2,u3; \
LOAD_DATA(R,S,u,t,E0,E1,u1); \
u2=(int)u>>8L; \
u1=(int)u&0xfc; \
u2&=0xfc; \
t=ROTATE(t,4); \
u>>=16L; \
LL^= *(const DES_LONG *)(des_SP +u1); \
LL^= *(const DES_LONG *)(des_SP+0x200+u2); \
u3=(int)(u>>8L); \
u1=(int)u&0xfc; \
u3&=0xfc; \
LL^= *(const DES_LONG *)(des_SP+0x400+u1); \
LL^= *(const DES_LONG *)(des_SP+0x600+u3); \
u2=(int)t>>8L; \
u1=(int)t&0xfc; \
u2&=0xfc; \
t>>=16L; \
LL^= *(const DES_LONG *)(des_SP+0x100+u1); \
LL^= *(const DES_LONG *)(des_SP+0x300+u2); \
u3=(int)t>>8L; \
u1=(int)t&0xfc; \
u3&=0xfc; \
LL^= *(const DES_LONG *)(des_SP+0x500+u1); \
LL^= *(const DES_LONG *)(des_SP+0x700+u3); }
#endif
#ifdef DES_RISC2
#define D_ENCRYPT(LL,R,S) { \
unsigned int u1,u2,s1,s2; \
LOAD_DATA(R,S,u,t,E0,E1,u1); \
u2=(int)u>>8L; \
u1=(int)u&0xfc; \
u2&=0xfc; \
t=ROTATE(t,4); \
LL^= *(const DES_LONG *)(des_SP +u1); \
LL^= *(const DES_LONG *)(des_SP+0x200+u2); \
s1=(int)(u>>16L); \
s2=(int)(u>>24L); \
s1&=0xfc; \
s2&=0xfc; \
LL^= *(const DES_LONG *)(des_SP+0x400+s1); \
LL^= *(const DES_LONG *)(des_SP+0x600+s2); \
u2=(int)t>>8L; \
u1=(int)t&0xfc; \
u2&=0xfc; \
LL^= *(const DES_LONG *)(des_SP+0x100+u1); \
LL^= *(const DES_LONG *)(des_SP+0x300+u2); \
s1=(int)(t>>16L); \
s2=(int)(t>>24L); \
s1&=0xfc; \
s2&=0xfc; \
LL^= *(const DES_LONG *)(des_SP+0x500+s1); \
LL^= *(const DES_LONG *)(des_SP+0x700+s2); }
#endif
#else
#define D_ENCRYPT(LL,R,S) { \
LOAD_DATA_tmp(R,S,u,t,E0,E1); \
t=ROTATE(t,4); \
LL^= \
*(const DES_LONG *)(des_SP +((u )&0xfc))^ \
*(const DES_LONG *)(des_SP+0x200+((u>> 8L)&0xfc))^ \
*(const DES_LONG *)(des_SP+0x400+((u>>16L)&0xfc))^ \
*(const DES_LONG *)(des_SP+0x600+((u>>24L)&0xfc))^ \
*(const DES_LONG *)(des_SP+0x100+((t )&0xfc))^ \
*(const DES_LONG *)(des_SP+0x300+((t>> 8L)&0xfc))^ \
*(const DES_LONG *)(des_SP+0x500+((t>>16L)&0xfc))^ \
*(const DES_LONG *)(des_SP+0x700+((t>>24L)&0xfc)); }
#endif
#else /* original version */
#if defined(DES_RISC1) || defined(DES_RISC2)
#ifdef DES_RISC1
#define D_ENCRYPT(LL,R,S) {\
unsigned int u1,u2,u3; \
LOAD_DATA(R,S,u,t,E0,E1,u1); \
u>>=2L; \
t=ROTATE(t,6); \
u2=(int)u>>8L; \
u1=(int)u&0x3f; \
u2&=0x3f; \
u>>=16L; \
LL^=des_SPtrans[0][u1]; \
LL^=des_SPtrans[2][u2]; \
u3=(int)u>>8L; \
u1=(int)u&0x3f; \
u3&=0x3f; \
LL^=des_SPtrans[4][u1]; \
LL^=des_SPtrans[6][u3]; \
u2=(int)t>>8L; \
u1=(int)t&0x3f; \
u2&=0x3f; \
t>>=16L; \
LL^=des_SPtrans[1][u1]; \
LL^=des_SPtrans[3][u2]; \
u3=(int)t>>8L; \
u1=(int)t&0x3f; \
u3&=0x3f; \
LL^=des_SPtrans[5][u1]; \
LL^=des_SPtrans[7][u3]; }
#endif
#ifdef DES_RISC2
#define D_ENCRYPT(LL,R,S) {\
unsigned int u1,u2,s1,s2; \
LOAD_DATA(R,S,u,t,E0,E1,u1); \
u>>=2L; \
t=ROTATE(t,6); \
u2=(int)u>>8L; \
u1=(int)u&0x3f; \
u2&=0x3f; \
LL^=des_SPtrans[0][u1]; \
LL^=des_SPtrans[2][u2]; \
s1=(int)u>>16L; \
s2=(int)u>>24L; \
s1&=0x3f; \
s2&=0x3f; \
LL^=des_SPtrans[4][s1]; \
LL^=des_SPtrans[6][s2]; \
u2=(int)t>>8L; \
u1=(int)t&0x3f; \
u2&=0x3f; \
LL^=des_SPtrans[1][u1]; \
LL^=des_SPtrans[3][u2]; \
s1=(int)t>>16; \
s2=(int)t>>24L; \
s1&=0x3f; \
s2&=0x3f; \
LL^=des_SPtrans[5][s1]; \
LL^=des_SPtrans[7][s2]; }
#endif
#else
#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]; }
#endif
#endif
/* 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<<size);
can be used to swap and move bits between words.
So l = 0 1 2 3 r = 16 17 18 19
4 5 6 7 20 21 22 23
8 9 10 11 24 25 26 27
12 13 14 15 28 29 30 31
becomes (for size == 2 and mask == 0x3333)
t = 2^16 3^17 -- -- l = 0 1 16 17 r = 2 3 18 19
6^20 7^21 -- -- 4 5 20 21 6 7 22 23
10^24 11^25 -- -- 8 9 24 25 10 11 24 25
14^28 15^29 -- -- 12 13 28 29 14 15 28 29
Thanks for hints from Richard Outerbridge - he told me IP&FP
could be done in 15 xor, 10 shifts and 5 ands.
When I finally started to think of the problem in 2D
I first got ~42 operations without xors. When I remembered
how to use xors :-) I got it to its final state.
*/
#define PERM_OP(a,b,t,n,m) ((t)=((((a)>>(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); \
}
OPENSSL_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