[thirdparty/openssl.git] / crypto / des / des_locl.h

/* 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)
#  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

/*
 * 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); \
        }

extern const DES_LONG DES_SPtrans[8][64];

void fcrypt_body(DES_LONG *out, DES_key_schedule *ks,
                 DES_LONG Eswap0, DES_LONG Eswap1);

# ifdef OPENSSL_SMALL_FOOTPRINT
#  undef DES_UNROLL
# endif
#endif
Commit	Line	Data
169cc7a1	1	/* crypto/des/des_locl.h */
d02b48c6 RE	2	/* Copyright (C) 1995-1997 Eric Young (eay@cryptsoft.com)
	3	* All rights reserved.
	4	*
	5	* This package is an SSL implementation written
	6	* by Eric Young (eay@cryptsoft.com).
	7	* The implementation was written so as to conform with Netscapes SSL.
0f113f3e	8	*
d02b48c6 RE	9	* This library is free for commercial and non-commercial use as long as
	10	* the following conditions are aheared to. The following conditions
	11	* apply to all code found in this distribution, be it the RC4, RSA,
	12	* lhash, DES, etc., code; not just the SSL code. The SSL documentation
	13	* included with this distribution is covered by the same copyright terms
	14	* except that the holder is Tim Hudson (tjh@cryptsoft.com).
0f113f3e	15	*
d02b48c6 RE	16	* Copyright remains Eric Young's, and as such any Copyright notices in
	17	* the code are not to be removed.
	18	* If this package is used in a product, Eric Young should be given attribution
	19	* as the author of the parts of the library used.
	20	* This can be in the form of a textual message at program startup or
	21	* in documentation (online or textual) provided with the package.
0f113f3e	22	*
d02b48c6 RE	23	* Redistribution and use in source and binary forms, with or without
	24	* modification, are permitted provided that the following conditions
	25	* are met:
	26	* 1. Redistributions of source code must retain the copyright
	27	* notice, this list of conditions and the following disclaimer.
	28	* 2. Redistributions in binary form must reproduce the above copyright
	29	* notice, this list of conditions and the following disclaimer in the
	30	* documentation and/or other materials provided with the distribution.
	31	* 3. All advertising materials mentioning features or use of this software
	32	* must display the following acknowledgement:
	33	* "This product includes cryptographic software written by
	34	* Eric Young (eay@cryptsoft.com)"
	35	* The word 'cryptographic' can be left out if the rouines from the library
	36	* being used are not cryptographic related :-).
0f113f3e	37	* 4. If you include any Windows specific code (or a derivative thereof) from
d02b48c6 RE	38	* the apps directory (application code) you must include an acknowledgement:
d02b48c6 RE	39	* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
0f113f3e	40	*
d02b48c6 RE	41	* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
	42	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	43	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	44	* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
	45	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	46	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	47	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	48	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	49	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	50	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	51	* SUCH DAMAGE.
0f113f3e	52	*
d02b48c6 RE	53	* The licence and distribution terms for any publically available version or
	54	* derivative of this code cannot be changed. i.e. this code cannot simply be
	55	* copied and put under another distribution licence
	56	* [including the GNU Public Licence.]
	57	*/
	58
d02b48c6	59	#ifndef HEADER_DES_LOCL_H
0f113f3e	60	# define HEADER_DES_LOCL_H
d02b48c6	61
0f113f3e	62	# include <openssl/e_os2.h>
a5bc1e85	63
0f113f3e MC	64	# if defined(OPENSSL_SYS_WIN32)
	65	# ifndef OPENSSL_SYS_MSDOS
	66	# define OPENSSL_SYS_MSDOS
	67	# endif
	68	# endif
e766a681	69
0f113f3e MC	70	# include <stdio.h>
	71	# include <stdlib.h>
	72
	73	# ifndef OPENSSL_SYS_MSDOS
	74	# if !defined(OPENSSL_SYS_VMS) \|\| defined(__DECC)
	75	# ifdef OPENSSL_UNISTD
	76	# include OPENSSL_UNISTD
	77	# else
	78	# include <unistd.h>
	79	# endif
	80	# include <math.h>
	81	# endif
	82	# endif
	83	# include <openssl/des.h>
d02b48c6	84
0f113f3e MC	85	# ifdef OPENSSL_SYS_MSDOS /* Visual C++ 2.1 (Windows NT/95) */
	86	# include <stdlib.h>
	87	# include <errno.h>
	88	# include <time.h>
	89	# include <io.h>
	90	# endif
7d7d2cbc	91
0f113f3e MC	92	# if defined(__STDC__) \|\| defined(OPENSSL_SYS_VMS) \|\| defined(M_XENIX) \|\| defined(OPENSSL_SYS_MSDOS)
	93	# include <string.h>
	94	# endif
a5a01e90	95
0f113f3e MC	96	# ifdef OPENSSL_BUILD_SHLIBCRYPTO
	97	# undef OPENSSL_EXTERN
	98	# define OPENSSL_EXTERN OPENSSL_EXPORT
	99	# endif
26da3e65	100
0f113f3e MC	101	# define ITERATIONS 16
0f113f3e MC	102	# define HALF_ITERATIONS 8
d02b48c6 RE	103
d02b48c6 RE	104	/* used in des_read and des_write */
0f113f3e MC	105	# define MAXWRITE (1024*16)
0f113f3e MC	106	# define BSIZE (MAXWRITE+4)
d02b48c6	107
0f113f3e MC	108	# define c2l(c,l) (l =((DES_LONG)(*((c)++))) , \
	109	l\|=((DES_LONG)(*((c)++)))<< 8L, \
	110	l\|=((DES_LONG)(*((c)++)))<<16L, \
	111	l\|=((DES_LONG)(*((c)++)))<<24L)
d02b48c6 RE	112
d02b48c6 RE	113	/* NOTE - c is not incremented as per c2l */
0f113f3e MC	114	# define c2ln(c,l1,l2,n) { \
	115	c+=n; \
	116	l1=l2=0; \
	117	switch (n) { \
	118	case 8: l2 =((DES_LONG)(*(--(c))))<<24L; \
	119	case 7: l2\|=((DES_LONG)(*(--(c))))<<16L; \
	120	case 6: l2\|=((DES_LONG)(*(--(c))))<< 8L; \
	121	case 5: l2\|=((DES_LONG)(*(--(c)))); \
	122	case 4: l1 =((DES_LONG)(*(--(c))))<<24L; \
	123	case 3: l1\|=((DES_LONG)(*(--(c))))<<16L; \
	124	case 2: l1\|=((DES_LONG)(*(--(c))))<< 8L; \
	125	case 1: l1\|=((DES_LONG)(*(--(c)))); \
	126	} \
	127	}
	128
	129	# define l2c(l,c) (*((c)++)=(unsigned char)(((l) )&0xff), \
	130	*((c)++)=(unsigned char)(((l)>> 8L)&0xff), \
	131	*((c)++)=(unsigned char)(((l)>>16L)&0xff), \
	132	*((c)++)=(unsigned char)(((l)>>24L)&0xff))
	133
	134	/*
	135	* replacements for htonl and ntohl since I have no idea what to do when
	136	* faced with machines with 8 byte longs.
	137	*/
	138	# define HDRSIZE 4
d02b48c6	139
0f113f3e MC	140	# define n2l(c,l) (l =((DES_LONG)(*((c)++)))<<24L, \
	141	l\|=((DES_LONG)(*((c)++)))<<16L, \
	142	l\|=((DES_LONG)(*((c)++)))<< 8L, \
	143	l\|=((DES_LONG)(*((c)++))))
d02b48c6	144
0f113f3e MC	145	# define l2n(l,c) (*((c)++)=(unsigned char)(((l)>>24L)&0xff), \
	146	*((c)++)=(unsigned char)(((l)>>16L)&0xff), \
	147	*((c)++)=(unsigned char)(((l)>> 8L)&0xff), \
	148	*((c)++)=(unsigned char)(((l) )&0xff))
d02b48c6	149
0f113f3e MC	150	/* NOTE - c is not incremented as per l2c */
	151	# define l2cn(l1,l2,c,n) { \
	152	c+=n; \
	153	switch (n) { \
	154	case 8: *(--(c))=(unsigned char)(((l2)>>24L)&0xff); \
	155	case 7: *(--(c))=(unsigned char)(((l2)>>16L)&0xff); \
	156	case 6: *(--(c))=(unsigned char)(((l2)>> 8L)&0xff); \
	157	case 5: *(--(c))=(unsigned char)(((l2) )&0xff); \
	158	case 4: *(--(c))=(unsigned char)(((l1)>>24L)&0xff); \
	159	case 3: *(--(c))=(unsigned char)(((l1)>>16L)&0xff); \
	160	case 2: *(--(c))=(unsigned char)(((l1)>> 8L)&0xff); \
	161	case 1: *(--(c))=(unsigned char)(((l1) )&0xff); \
	162	} \
	163	}
	164
	165	# if (defined(OPENSSL_SYS_WIN32) && defined(_MSC_VER))
	166	# define ROTATE(a,n) (_lrotr(a,n))
	167	# elif defined(__ICC)
	168	# define ROTATE(a,n) (_rotr(a,n))
	169	# elif defined(__GNUC__) && __GNUC__>=2 && !defined(__STRICT_ANSI__) && !defined(OPENSSL_NO_ASM) && !defined(OPENSSL_NO_INLINE_ASM) && !defined(PEDANTIC)
	170	# if defined(__i386) \|\| defined(__i386__) \|\| defined(__x86_64) \|\| defined(__x86_64__)
	171	# define ROTATE(a,n) ({ register unsigned int ret; \
	172	asm ("rorl %1,%0" \
	173	: "=r"(ret) \
	174	: "I"(n),"0"(a) \
	175	: "cc"); \
	176	ret; \
	177	})
	178	# endif
	179	# endif
	180	# ifndef ROTATE
	181	# define ROTATE(a,n) (((a)>>(n))+((a)<<(32-(n))))
	182	# endif
d02b48c6	183
0f113f3e MC	184	/*
	185	* Don't worry about the LOAD_DATA() stuff, that is used by fcrypt() to add
	186	* it's little bit to the front
	187	*/
d02b48c6	188
0f113f3e MC	189	# ifdef DES_FCRYPT
	190
	191	# define LOAD_DATA_tmp(R,S,u,t,E0,E1) \
	192	{ DES_LONG tmp; LOAD_DATA(R,S,u,t,E0,E1,tmp); }
	193
	194	# define LOAD_DATA(R,S,u,t,E0,E1,tmp) \
	195	t=R^(R>>16L); \
	196	u=t&E0; t&=E1; \
	197	tmp=(u<<16); u^=R^s[S ]; u^=tmp; \
	198	tmp=(t<<16); t^=R^s[S+1]; t^=tmp
	199	# else
	200	# define LOAD_DATA_tmp(a,b,c,d,e,f) LOAD_DATA(a,b,c,d,e,f,g)
	201	# define LOAD_DATA(R,S,u,t,E0,E1,tmp) \
	202	u=R^s[S ]; \
	203	t=R^s[S+1]
	204	# endif
d02b48c6	205
0f113f3e MC	206	/*
	207	* The changes to this macro may help or hinder, depending on the compiler
	208	* and the architecture. gcc2 always seems to do well :-). Inspired by Dana
	209	* How <how@isl.stanford.edu> DO NOT use the alternative version on machines
	210	* with 8 byte longs. It does not seem to work on the Alpha, even when
	211	* DES_LONG is 4 bytes, probably an issue of accessing non-word aligned
	212	* objects :-(
	213	*/
	214	# ifdef DES_PTR
d02b48c6	215
0f113f3e MC	216	/*
	217	* It recently occurred to me that 0^0^0^0^0^0^0 == 0, so there is no reason
	218	* to not xor all the sub items together. This potentially saves a register
	219	* since things can be xored directly into L
	220	*/
d02b48c6	221
0f113f3e MC	222	# if defined(DES_RISC1) \|\| defined(DES_RISC2)
	223	# ifdef DES_RISC1
	224	# define D_ENCRYPT(LL,R,S) { \
	225	unsigned int u1,u2,u3; \
	226	LOAD_DATA(R,S,u,t,E0,E1,u1); \
	227	u2=(int)u>>8L; \
	228	u1=(int)u&0xfc; \
	229	u2&=0xfc; \
	230	t=ROTATE(t,4); \
	231	u>>=16L; \
	232	LL^= (const DES_LONG )(des_SP +u1); \
	233	LL^= (const DES_LONG )(des_SP+0x200+u2); \
	234	u3=(int)(u>>8L); \
	235	u1=(int)u&0xfc; \
	236	u3&=0xfc; \
	237	LL^= (const DES_LONG )(des_SP+0x400+u1); \
	238	LL^= (const DES_LONG )(des_SP+0x600+u3); \
	239	u2=(int)t>>8L; \
	240	u1=(int)t&0xfc; \
	241	u2&=0xfc; \
	242	t>>=16L; \
	243	LL^= (const DES_LONG )(des_SP+0x100+u1); \
	244	LL^= (const DES_LONG )(des_SP+0x300+u2); \
	245	u3=(int)t>>8L; \
	246	u1=(int)t&0xfc; \
	247	u3&=0xfc; \
	248	LL^= (const DES_LONG )(des_SP+0x500+u1); \
	249	LL^= (const DES_LONG )(des_SP+0x700+u3); }
	250	# endif
	251	# ifdef DES_RISC2
	252	# define D_ENCRYPT(LL,R,S) { \
	253	unsigned int u1,u2,s1,s2; \
	254	LOAD_DATA(R,S,u,t,E0,E1,u1); \
	255	u2=(int)u>>8L; \
	256	u1=(int)u&0xfc; \
	257	u2&=0xfc; \
	258	t=ROTATE(t,4); \
	259	LL^= (const DES_LONG )(des_SP +u1); \
	260	LL^= (const DES_LONG )(des_SP+0x200+u2); \
	261	s1=(int)(u>>16L); \
	262	s2=(int)(u>>24L); \
	263	s1&=0xfc; \
	264	s2&=0xfc; \
	265	LL^= (const DES_LONG )(des_SP+0x400+s1); \
	266	LL^= (const DES_LONG )(des_SP+0x600+s2); \
	267	u2=(int)t>>8L; \
	268	u1=(int)t&0xfc; \
	269	u2&=0xfc; \
	270	LL^= (const DES_LONG )(des_SP+0x100+u1); \
	271	LL^= (const DES_LONG )(des_SP+0x300+u2); \
	272	s1=(int)(t>>16L); \
	273	s2=(int)(t>>24L); \
	274	s1&=0xfc; \
	275	s2&=0xfc; \
	276	LL^= (const DES_LONG )(des_SP+0x500+s1); \
	277	LL^= (const DES_LONG )(des_SP+0x700+s2); }
	278	# endif
	279	# else
	280	# define D_ENCRYPT(LL,R,S) { \
	281	LOAD_DATA_tmp(R,S,u,t,E0,E1); \
	282	t=ROTATE(t,4); \
	283	LL^= \
	284	(const DES_LONG )(des_SP +((u )&0xfc))^ \
	285	(const DES_LONG )(des_SP+0x200+((u>> 8L)&0xfc))^ \
286	(const DES_LONG )(des_SP+0x400+((u>>16L)&0xfc))^ \
287	(const DES_LONG )(des_SP+0x600+((u>>24L)&0xfc))^ \
288	(const DES_LONG )(des_SP+0x100+((t )&0xfc))^ \
289	(const DES_LONG )(des_SP+0x300+((t>> 8L)&0xfc))^ \
290	(const DES_LONG )(des_SP+0x500+((t>>16L)&0xfc))^ \
291	(const DES_LONG )(des_SP+0x700+((t>>24L)&0xfc)); }
292	# endif
293
294	# else /* original version */
295
296	# if defined(DES_RISC1) \|\| defined(DES_RISC2)
297	# ifdef DES_RISC1
298	# define D_ENCRYPT(LL,R,S) {\
299	unsigned int u1,u2,u3; \
300	LOAD_DATA(R,S,u,t,E0,E1,u1); \
301	u>>=2L; \
302	t=ROTATE(t,6); \
303	u2=(int)u>>8L; \
304	u1=(int)u&0x3f; \
305	u2&=0x3f; \
306	u>>=16L; \
307	LL^=DES_SPtrans[0][u1]; \
308	LL^=DES_SPtrans[2][u2]; \
309	u3=(int)u>>8L; \
310	u1=(int)u&0x3f; \
311	u3&=0x3f; \
312	LL^=DES_SPtrans[4][u1]; \
313	LL^=DES_SPtrans[6][u3]; \
314	u2=(int)t>>8L; \
315	u1=(int)t&0x3f; \
316	u2&=0x3f; \
317	t>>=16L; \
318	LL^=DES_SPtrans[1][u1]; \
319	LL^=DES_SPtrans[3][u2]; \
320	u3=(int)t>>8L; \
321	u1=(int)t&0x3f; \
322	u3&=0x3f; \
323	LL^=DES_SPtrans[5][u1]; \
324	LL^=DES_SPtrans[7][u3]; }
325	# endif
326	# ifdef DES_RISC2
327	# define D_ENCRYPT(LL,R,S) {\
328	unsigned int u1,u2,s1,s2; \
329	LOAD_DATA(R,S,u,t,E0,E1,u1); \
330	u>>=2L; \
331	t=ROTATE(t,6); \
332	u2=(int)u>>8L; \
333	u1=(int)u&0x3f; \
334	u2&=0x3f; \
335	LL^=DES_SPtrans[0][u1]; \
336	LL^=DES_SPtrans[2][u2]; \
337	s1=(int)u>>16L; \
338	s2=(int)u>>24L; \
339	s1&=0x3f; \
340	s2&=0x3f; \
341	LL^=DES_SPtrans[4][s1]; \
342	LL^=DES_SPtrans[6][s2]; \
343	u2=(int)t>>8L; \
344	u1=(int)t&0x3f; \
345	u2&=0x3f; \
346	LL^=DES_SPtrans[1][u1]; \
347	LL^=DES_SPtrans[3][u2]; \
348	s1=(int)t>>16; \
349	s2=(int)t>>24L; \
350	s1&=0x3f; \
351	s2&=0x3f; \
352	LL^=DES_SPtrans[5][s1]; \
353	LL^=DES_SPtrans[7][s2]; }
354	# endif
355
356	# else
357
358	# define D_ENCRYPT(LL,R,S) {\
359	LOAD_DATA_tmp(R,S,u,t,E0,E1); \
360	t=ROTATE(t,4); \
361	LL^=\
362	DES_SPtrans[0][(u>> 2L)&0x3f]^ \
363	DES_SPtrans[2][(u>>10L)&0x3f]^ \
364	DES_SPtrans[4][(u>>18L)&0x3f]^ \
365	DES_SPtrans[6][(u>>26L)&0x3f]^ \
366	DES_SPtrans[1][(t>> 2L)&0x3f]^ \
367	DES_SPtrans[3][(t>>10L)&0x3f]^ \
368	DES_SPtrans[5][(t>>18L)&0x3f]^ \
369	DES_SPtrans[7][(t>>26L)&0x3f]; }
370	# endif
371	# endif
d02b48c6	372
0f113f3e MC	373	/*-
	374	* IP and FP
	375	* The problem is more of a geometric problem that random bit fiddling.
	376	0 1 2 3 4 5 6 7 62 54 46 38 30 22 14 6
	377	8 9 10 11 12 13 14 15 60 52 44 36 28 20 12 4
	378	16 17 18 19 20 21 22 23 58 50 42 34 26 18 10 2
	379	24 25 26 27 28 29 30 31 to 56 48 40 32 24 16 8 0
	380
	381	32 33 34 35 36 37 38 39 63 55 47 39 31 23 15 7
	382	40 41 42 43 44 45 46 47 61 53 45 37 29 21 13 5
	383	48 49 50 51 52 53 54 55 59 51 43 35 27 19 11 3
	384	56 57 58 59 60 61 62 63 57 49 41 33 25 17 9 1
	385
	386	The output has been subject to swaps of the form
	387	0 1 -> 3 1 but the odd and even bits have been put into
	388	2 3 2 0
	389	different words. The main trick is to remember that
	390	t=((l>>size)^r)&(mask);
	391	r^=t;
	392	l^=(t<<size);
	393	can be used to swap and move bits between words.
	394
	395	So l = 0 1 2 3 r = 16 17 18 19
	396	4 5 6 7 20 21 22 23
	397	8 9 10 11 24 25 26 27
	398	12 13 14 15 28 29 30 31
	399	becomes (for size == 2 and mask == 0x3333)
	400	t = 2^16 3^17 -- -- l = 0 1 16 17 r = 2 3 18 19
	401	6^20 7^21 -- -- 4 5 20 21 6 7 22 23
	402	10^24 11^25 -- -- 8 9 24 25 10 11 24 25
	403	14^28 15^29 -- -- 12 13 28 29 14 15 28 29
	404
	405	Thanks for hints from Richard Outerbridge - he told me IP&FP
	406	could be done in 15 xor, 10 shifts and 5 ands.
	407	When I finally started to think of the problem in 2D
	408	I first got ~42 operations without xors. When I remembered
	409	how to use xors :-) I got it to its final state.
	410	*/
	411	# define PERM_OP(a,b,t,n,m) ((t)=((((a)>>(n))^(b))&(m)),\
	412	(b)^=(t),\
	413	(a)^=((t)<<(n)))
	414
	415	# define IP(l,r) \
	416	{ \
	417	register DES_LONG tt; \
	418	PERM_OP(r,l,tt, 4,0x0f0f0f0fL); \
	419	PERM_OP(l,r,tt,16,0x0000ffffL); \
	420	PERM_OP(r,l,tt, 2,0x33333333L); \
	421	PERM_OP(l,r,tt, 8,0x00ff00ffL); \
	422	PERM_OP(r,l,tt, 1,0x55555555L); \
	423	}
	424
	425	# define FP(l,r) \
	426	{ \
	427	register DES_LONG tt; \
	428	PERM_OP(l,r,tt, 1,0x55555555L); \
	429	PERM_OP(r,l,tt, 8,0x00ff00ffL); \
	430	PERM_OP(l,r,tt, 2,0x33333333L); \
	431	PERM_OP(r,l,tt,16,0x0000ffffL); \
	432	PERM_OP(l,r,tt, 4,0x0f0f0f0fL); \
	433	}
d02b48c6	434
e62991a0	435	extern const DES_LONG DES_SPtrans[8][64];
d02b48c6	436
0f113f3e MC	437	void fcrypt_body(DES_LONG out, DES_key_schedule ks,
0f113f3e MC	438	DES_LONG Eswap0, DES_LONG Eswap1);
3d6312e8	439
0f113f3e MC	440	# ifdef OPENSSL_SMALL_FOOTPRINT
	441	# undef DES_UNROLL
	442	# endif
d02b48c6	443	#endif