www.pudn.com > truecrypt.zip > CAST_LCL.H
/* crypto/rc2/rc2_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.]
*/
#ifdef WIN32
#include
#endif
#undef c2l
#define c2l(c,l) (l =((unsigned long)(*((c)++))) , \
l|=((unsigned long)(*((c)++)))<< 8L, \
l|=((unsigned long)(*((c)++)))<<16L, \
l|=((unsigned long)(*((c)++)))<<24L)
/* NOTE - c is not incremented as per c2l */
#undef c2ln
#define c2ln(c,l1,l2,n) { \
c+=n; \
l1=l2=0; \
switch (n) { \
case 8: l2 =((unsigned long)(*(--(c))))<<24L; \
case 7: l2|=((unsigned long)(*(--(c))))<<16L; \
case 6: l2|=((unsigned long)(*(--(c))))<< 8L; \
case 5: l2|=((unsigned long)(*(--(c)))); \
case 4: l1 =((unsigned long)(*(--(c))))<<24L; \
case 3: l1|=((unsigned long)(*(--(c))))<<16L; \
case 2: l1|=((unsigned long)(*(--(c))))<< 8L; \
case 1: l1|=((unsigned long)(*(--(c)))); \
} \
}
#undef l2c
#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))
/* NOTE - c is not incremented as per l2c */
#undef l2cn
#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); \
} \
}
/* NOTE - c is not incremented as per n2l */
#define n2ln(c,l1,l2,n) { \
c+=n; \
l1=l2=0; \
switch (n) { \
case 8: l2 =((unsigned long)(*(--(c)))) ; \
case 7: l2|=((unsigned long)(*(--(c))))<< 8; \
case 6: l2|=((unsigned long)(*(--(c))))<<16; \
case 5: l2|=((unsigned long)(*(--(c))))<<24; \
case 4: l1 =((unsigned long)(*(--(c)))) ; \
case 3: l1|=((unsigned long)(*(--(c))))<< 8; \
case 2: l1|=((unsigned long)(*(--(c))))<<16; \
case 1: l1|=((unsigned long)(*(--(c))))<<24; \
} \
}
/* NOTE - c is not incremented as per l2n */
#define l2nn(l1,l2,c,n) { \
c+=n; \
switch (n) { \
case 8: *(--(c))=(unsigned char)(((l2) )&0xff); \
case 7: *(--(c))=(unsigned char)(((l2)>> 8)&0xff); \
case 6: *(--(c))=(unsigned char)(((l2)>>16)&0xff); \
case 5: *(--(c))=(unsigned char)(((l2)>>24)&0xff); \
case 4: *(--(c))=(unsigned char)(((l1) )&0xff); \
case 3: *(--(c))=(unsigned char)(((l1)>> 8)&0xff); \
case 2: *(--(c))=(unsigned char)(((l1)>>16)&0xff); \
case 1: *(--(c))=(unsigned char)(((l1)>>24)&0xff); \
} \
}
#undef n2l
#define n2l(c,l) (l =((unsigned long)(*((c)++)))<<24L, \
l|=((unsigned long)(*((c)++)))<<16L, \
l|=((unsigned long)(*((c)++)))<< 8L, \
l|=((unsigned long)(*((c)++))))
#undef l2n
#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))
//#if defined(WIN32)
//#define ROTL(a,n) (_lrotl(a,n))
//#else
#define ROTL(a,n) (((a)<<(n))|((a)>>(32-(n))))
//#endif
#define C_M 0x3fc
#define C_0 22L
#define C_1 14L
#define C_2 6L
#define C_3 2L /* left shift */
/* The rotate has an extra 16 added to it to help the x86 asm */
#if defined(CAST_PTR)
#define E_CAST(n,key,L,R,OP1,OP2,OP3) \
{ \
int i; \
t=key[n*2] OP1 R; \
i=key[n*2+1]; \
t=ROTL(t,i); \
L^= ((( *(CAST_LONG *)((unsigned char *) \
CAST_S_table0+((t>>C_2)&C_M)) OP2 \
*(CAST_LONG *)((unsigned char *) \
CAST_S_table1+((t<>C_0)&C_M))) OP1 \
*(CAST_LONG *)((unsigned char *) \
CAST_S_table3+((t>>C_1)&C_M))); \
}
#elif defined(CAST_PTR2)
#define E_CAST(n,key,L,R,OP1,OP2,OP3) \
{ \
int i; \
CAST_LONG u,v,w; \
w=key[n*2] OP1 R; \
i=key[n*2+1]; \
w=ROTL(w,i); \
u=w>>C_2; \
v=w<>C_0; \
t=t OP2 *(CAST_LONG *)((unsigned char *)CAST_S_table1+v); \
v=w>>C_1; \
u&=C_M; \
v&=C_M; \
t=t OP3 *(CAST_LONG *)((unsigned char *)CAST_S_table2+u); \
t=t OP1 *(CAST_LONG *)((unsigned char *)CAST_S_table3+v); \
L^=t; \
}
#else
#define E_CAST(n,key,L,R,OP1,OP2,OP3) \
{ \
CAST_LONG a,b,c,d; \
t=key[n*2] OP1 R; \
t=ROTL(t,(key[n*2+1])); \
a=CAST_S_table0[(t>> 8)&0xff]; \
b=CAST_S_table1[(t )&0xff]; \
c=CAST_S_table2[(t>>24)&0xff]; \
d=CAST_S_table3[(t>>16)&0xff]; \
L^=(((a OP2 b) OP3 c) OP1 d); \
}
#endif
extern CAST_LONG CAST_S_table0[256];
extern CAST_LONG CAST_S_table1[256];
extern CAST_LONG CAST_S_table2[256];
extern CAST_LONG CAST_S_table3[256];
extern CAST_LONG CAST_S_table4[256];
extern CAST_LONG CAST_S_table5[256];
extern CAST_LONG CAST_S_table6[256];
extern CAST_LONG CAST_S_table7[256];