3e9e810f2e
Many options for supporting optimizations for legacy crypto on legacy
platforms have been removed. This simplifies the source code and
does not really penalize anyone.
DES_PTR (always on)
DES_RISC1, DES_RISC2 (always off)
DES_INT (always 'unsigned int')
DES_UNROLL (always on)
BF_PTR (always on) BF_PTR2 (removed)
MD2_CHAR, MD2_LONG (always 'unsigned char')
IDEA_SHORT, IDEA_LONG (always 'unsigned int')
RC2_SHORT, RC2_LONG (always 'unsigned int')
RC4_LONG (only int and char (for assembler) are supported)
RC4_CHUNK (always long), RC_CHUNK_LL (removed)
RC4_INDEX (always on)
And also make D_ENCRYPT macro more clear (@appro)
This is done in consultation with Andy.
Reviewed-by: Andy Polyakov <appro@openssl.org>
291 lines
11 KiB
C
291 lines
11 KiB
C
/* 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)
|
|
# 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))
|
|
# 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<<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); \
|
|
}
|
|
|
|
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
|