/*------------------------------------------------------------------
 * Portable crypt() Implementation.
 *
 * Copyright 1990,1991 Eric Young. All Rights Reserved.
 * This version of crypt has been developed from my MIT compatable
 * DES library.
 * The library is available at pub/DES at ftp.psy.uq.oz.au
 * eay@psych.psy.uq.oz.au
 *------------------------------------------------------------------
 */

#include <stdio.h>

/*--------------------------------------------------------------------*/

typedef unsigned char des_cblock[8];

typedef struct des_ks_struct
{
    des_cblock _;
} des_key_schedule[16];

#define DES_KEY_SZ     (sizeof(des_cblock))
#define DES_ENCRYPT    1
#define DES_DECRYPT    0

typedef unsigned char   crypt_uchar;
typedef unsigned short  crypt_ushort;
typedef unsigned int    crypt_uint;
typedef unsigned long   crypt_ulong;

static void body(crypt_ulong *out0, crypt_ulong *out1, des_key_schedule *ks, crypt_ulong Eswap0, crypt_ulong Eswap1);

#define ITERATIONS 16
#define HALF_ITERATIONS 8

#define c2l(c,l) (l =((crypt_ulong)(*((c)++)))    , \
                  l|=((crypt_ulong)(*((c)++)))<< 8, \
                  l|=((crypt_ulong)(*((c)++)))<<16, \
                  l|=((crypt_ulong)(*((c)++)))<<24)

#define l2c(l,c) (*((c)++)=(crypt_uchar)(((l)    )&0xff), \
                  *((c)++)=(crypt_uchar)(((l)>> 8)&0xff), \
                  *((c)++)=(crypt_uchar)(((l)>>16)&0xff), \
                  *((c)++)=(crypt_uchar)(((l)>>24)&0xff))

/*--------------------------------------------------------------------*/
static unsigned long SPtrans[8][64]={
{
/* nibble 0 */
0x00410100, 0x00010000, 0x40400000, 0x40410100,
0x00400000, 0x40010100, 0x40010000, 0x40400000,
0x40010100, 0x00410100, 0x00410000, 0x40000100,
0x40400100, 0x00400000, 0x00000000, 0x40010000,
0x00010000, 0x40000000, 0x00400100, 0x00010100,
0x40410100, 0x00410000, 0x40000100, 0x00400100,
0x40000000, 0x00000100, 0x00010100, 0x40410000,
0x00000100, 0x40400100, 0x40410000, 0x00000000,
0x00000000, 0x40410100, 0x00400100, 0x40010000,
0x00410100, 0x00010000, 0x40000100, 0x00400100,
0x40410000, 0x00000100, 0x00010100, 0x40400000,
0x40010100, 0x40000000, 0x40400000, 0x00410000,
0x40410100, 0x00010100, 0x00410000, 0x40400100,
0x00400000, 0x40000100, 0x40010000, 0x00000000,
0x00010000, 0x00400000, 0x40400100, 0x00410100,
0x40000000, 0x40410000, 0x00000100, 0x40010100,
},
{
/* nibble 1 */
0x08021002, 0x00000000, 0x00021000, 0x08020000,
0x08000002, 0x00001002, 0x08001000, 0x00021000,
0x00001000, 0x08020002, 0x00000002, 0x08001000,
0x00020002, 0x08021000, 0x08020000, 0x00000002,
0x00020000, 0x08001002, 0x08020002, 0x00001000,
0x00021002, 0x08000000, 0x00000000, 0x00020002,
0x08001002, 0x00021002, 0x08021000, 0x08000002,
0x08000000, 0x00020000, 0x00001002, 0x08021002,
0x00020002, 0x08021000, 0x08001000, 0x00021002,
0x08021002, 0x00020002, 0x08000002, 0x00000000,
0x08000000, 0x00001002, 0x00020000, 0x08020002,
0x00001000, 0x08000000, 0x00021002, 0x08001002,
0x08021000, 0x00001000, 0x00000000, 0x08000002,
0x00000002, 0x08021002, 0x00021000, 0x08020000,
0x08020002, 0x00020000, 0x00001002, 0x08001000,
0x08001002, 0x00000002, 0x08020000, 0x00021000,
},
{
/* nibble 2 */
0x20800000, 0x00808020, 0x00000020, 0x20800020,
0x20008000, 0x00800000, 0x20800020, 0x00008020,
0x00800020, 0x00008000, 0x00808000, 0x20000000,
0x20808020, 0x20000020, 0x20000000, 0x20808000,
0x00000000, 0x20008000, 0x00808020, 0x00000020,
0x20000020, 0x20808020, 0x00008000, 0x20800000,
0x20808000, 0x00800020, 0x20008020, 0x00808000,
0x00008020, 0x00000000, 0x00800000, 0x20008020,
0x00808020, 0x00000020, 0x20000000, 0x00008000,
0x20000020, 0x20008000, 0x00808000, 0x20800020,
0x00000000, 0x00808020, 0x00008020, 0x20808000,
0x20008000, 0x00800000, 0x20808020, 0x20000000,
0x20008020, 0x20800000, 0x00800000, 0x20808020,
0x00008000, 0x00800020, 0x20800020, 0x00008020,
0x00800020, 0x00000000, 0x20808000, 0x20000020,
0x20800000, 0x20008020, 0x00000020, 0x00808000,
},
{
/* nibble 3 */
0x00080201, 0x02000200, 0x00000001, 0x02080201,
0x00000000, 0x02080000, 0x02000201, 0x00080001,
0x02080200, 0x02000001, 0x02000000, 0x00000201,
0x02000001, 0x00080201, 0x00080000, 0x02000000,
0x02080001, 0x00080200, 0x00000200, 0x00000001,
0x00080200, 0x02000201, 0x02080000, 0x00000200,
0x00000201, 0x00000000, 0x00080001, 0x02080200,
0x02000200, 0x02080001, 0x02080201, 0x00080000,
0x02080001, 0x00000201, 0x00080000, 0x02000001,
0x00080200, 0x02000200, 0x00000001, 0x02080000,
0x02000201, 0x00000000, 0x00000200, 0x00080001,
0x00000000, 0x02080001, 0x02080200, 0x00000200,
0x02000000, 0x02080201, 0x00080201, 0x00080000,
0x02080201, 0x00000001, 0x02000200, 0x00080201,
0x00080001, 0x00080200, 0x02080000, 0x02000201,
0x00000201, 0x02000000, 0x02000001, 0x02080200,
},
{
/* nibble 4 */
0x01000000, 0x00002000, 0x00000080, 0x01002084,
0x01002004, 0x01000080, 0x00002084, 0x01002000,
0x00002000, 0x00000004, 0x01000004, 0x00002080,
0x01000084, 0x01002004, 0x01002080, 0x00000000,
0x00002080, 0x01000000, 0x00002004, 0x00000084,
0x01000080, 0x00002084, 0x00000000, 0x01000004,
0x00000004, 0x01000084, 0x01002084, 0x00002004,
0x01002000, 0x00000080, 0x00000084, 0x01002080,
0x01002080, 0x01000084, 0x00002004, 0x01002000,
0x00002000, 0x00000004, 0x01000004, 0x01000080,
0x01000000, 0x00002080, 0x01002084, 0x00000000,
0x00002084, 0x01000000, 0x00000080, 0x00002004,
0x01000084, 0x00000080, 0x00000000, 0x01002084,
0x01002004, 0x01002080, 0x00000084, 0x00002000,
0x00002080, 0x01002004, 0x01000080, 0x00000084,
0x00000004, 0x00002084, 0x01002000, 0x01000004,
},
{
/* nibble 5 */
0x10000008, 0x00040008, 0x00000000, 0x10040400,
0x00040008, 0x00000400, 0x10000408, 0x00040000,
0x00000408, 0x10040408, 0x00040400, 0x10000000,
0x10000400, 0x10000008, 0x10040000, 0x00040408,
0x00040000, 0x10000408, 0x10040008, 0x00000000,
0x00000400, 0x00000008, 0x10040400, 0x10040008,
0x10040408, 0x10040000, 0x10000000, 0x00000408,
0x00000008, 0x00040400, 0x00040408, 0x10000400,
0x00000408, 0x10000000, 0x10000400, 0x00040408,
0x10040400, 0x00040008, 0x00000000, 0x10000400,
0x10000000, 0x00000400, 0x10040008, 0x00040000,
0x00040008, 0x10040408, 0x00040400, 0x00000008,
0x10040408, 0x00040400, 0x00040000, 0x10000408,
0x10000008, 0x10040000, 0x00040408, 0x00000000,
0x00000400, 0x10000008, 0x10000408, 0x10040400,
0x10040000, 0x00000408, 0x00000008, 0x10040008,
},
{
/* nibble 6 */
0x00000800, 0x00000040, 0x00200040, 0x80200000,
0x80200840, 0x80000800, 0x00000840, 0x00000000,
0x00200000, 0x80200040, 0x80000040, 0x00200800,
0x80000000, 0x00200840, 0x00200800, 0x80000040,
0x80200040, 0x00000800, 0x80000800, 0x80200840,
0x00000000, 0x00200040, 0x80200000, 0x00000840,
0x80200800, 0x80000840, 0x00200840, 0x80000000,
0x80000840, 0x80200800, 0x00000040, 0x00200000,
0x80000840, 0x00200800, 0x80200800, 0x80000040,
0x00000800, 0x00000040, 0x00200000, 0x80200800,
0x80200040, 0x80000840, 0x00000840, 0x00000000,
0x00000040, 0x80200000, 0x80000000, 0x00200040,
0x00000000, 0x80200040, 0x00200040, 0x00000840,
0x80000040, 0x00000800, 0x80200840, 0x00200000,
0x00200840, 0x80000000, 0x80000800, 0x80200840,
0x80200000, 0x00200840, 0x00200800, 0x80000800,
},
{
/* nibble 7 */
0x04100010, 0x04104000, 0x00004010, 0x00000000,
0x04004000, 0x00100010, 0x04100000, 0x04104010,
0x00000010, 0x04000000, 0x00104000, 0x00004010,
0x00104010, 0x04004010, 0x04000010, 0x04100000,
0x00004000, 0x00104010, 0x00100010, 0x04004000,
0x04104010, 0x04000010, 0x00000000, 0x00104000,
0x04000000, 0x00100000, 0x04004010, 0x04100010,
0x00100000, 0x00004000, 0x04104000, 0x00000010,
0x00100000, 0x00004000, 0x04000010, 0x04104010,
0x00004010, 0x04000000, 0x00000000, 0x00104000,
0x04100010, 0x04004010, 0x04004000, 0x00100010,
0x04104000, 0x00000010, 0x00100010, 0x04004000,
0x04104010, 0x00100000, 0x04100000, 0x04000010,
0x00104000, 0x00004010, 0x04004010, 0x04100000,
0x00000010, 0x04104000, 0x00104010, 0x00000000,
0x04000000, 0x04100010, 0x00004000, 0x00104010}};
static crypt_ulong skb[8][64]={
{
/* for C bits (numbered as per FIPS 46) 1 2 3 4 5 6 */
0x00000000,0x00000010,0x20000000,0x20000010,
0x00010000,0x00010010,0x20010000,0x20010010,
0x00000800,0x00000810,0x20000800,0x20000810,
0x00010800,0x00010810,0x20010800,0x20010810,
0x00000020,0x00000030,0x20000020,0x20000030,
0x00010020,0x00010030,0x20010020,0x20010030,
0x00000820,0x00000830,0x20000820,0x20000830,
0x00010820,0x00010830,0x20010820,0x20010830,
0x00080000,0x00080010,0x20080000,0x20080010,
0x00090000,0x00090010,0x20090000,0x20090010,
0x00080800,0x00080810,0x20080800,0x20080810,
0x00090800,0x00090810,0x20090800,0x20090810,
0x00080020,0x00080030,0x20080020,0x20080030,
0x00090020,0x00090030,0x20090020,0x20090030,
0x00080820,0x00080830,0x20080820,0x20080830,
0x00090820,0x00090830,0x20090820,0x20090830,
},
{/* for C bits (numbered as per FIPS 46) 7 8 10 11 12 13 */
0x00000000,0x02000000,0x00002000,0x02002000,
0x00200000,0x02200000,0x00202000,0x02202000,
0x00000004,0x02000004,0x00002004,0x02002004,
0x00200004,0x02200004,0x00202004,0x02202004,
0x00000400,0x02000400,0x00002400,0x02002400,
0x00200400,0x02200400,0x00202400,0x02202400,
0x00000404,0x02000404,0x00002404,0x02002404,
0x00200404,0x02200404,0x00202404,0x02202404,
0x10000000,0x12000000,0x10002000,0x12002000,
0x10200000,0x12200000,0x10202000,0x12202000,
0x10000004,0x12000004,0x10002004,0x12002004,
0x10200004,0x12200004,0x10202004,0x12202004,
0x10000400,0x12000400,0x10002400,0x12002400,
0x10200400,0x12200400,0x10202400,0x12202400,
0x10000404,0x12000404,0x10002404,0x12002404,
0x10200404,0x12200404,0x10202404,0x12202404,
},
{/* for C bits (numbered as per FIPS 46) 14 15 16 17 19 20 */
0x00000000,0x00000001,0x00040000,0x00040001,
0x01000000,0x01000001,0x01040000,0x01040001,
0x00000002,0x00000003,0x00040002,0x00040003,
0x01000002,0x01000003,0x01040002,0x01040003,
0x00000200,0x00000201,0x00040200,0x00040201,
0x01000200,0x01000201,0x01040200,0x01040201,
0x00000202,0x00000203,0x00040202,0x00040203,
0x01000202,0x01000203,0x01040202,0x01040203,
0x08000000,0x08000001,0x08040000,0x08040001,
0x09000000,0x09000001,0x09040000,0x09040001,
0x08000002,0x08000003,0x08040002,0x08040003,
0x09000002,0x09000003,0x09040002,0x09040003,
0x08000200,0x08000201,0x08040200,0x08040201,
0x09000200,0x09000201,0x09040200,0x09040201,
0x08000202,0x08000203,0x08040202,0x08040203,
0x09000202,0x09000203,0x09040202,0x09040203,
},
{/* for C bits (numbered as per FIPS 46) 21 23 24 26 27 28 */
0x00000000,0x00100000,0x00000100,0x00100100,
0x00000008,0x00100008,0x00000108,0x00100108,
0x00001000,0x00101000,0x00001100,0x00101100,
0x00001008,0x00101008,0x00001108,0x00101108,
0x04000000,0x04100000,0x04000100,0x04100100,
0x04000008,0x04100008,0x04000108,0x04100108,
0x04001000,0x04101000,0x04001100,0x04101100,
0x04001008,0x04101008,0x04001108,0x04101108,
0x00020000,0x00120000,0x00020100,0x00120100,
0x00020008,0x00120008,0x00020108,0x00120108,
0x00021000,0x00121000,0x00021100,0x00121100,
0x00021008,0x00121008,0x00021108,0x00121108,
0x04020000,0x04120000,0x04020100,0x04120100,
0x04020008,0x04120008,0x04020108,0x04120108,
0x04021000,0x04121000,0x04021100,0x04121100,
0x04021008,0x04121008,0x04021108,0x04121108,
},
{/* for D bits (numbered as per FIPS 46) 1 2 3 4 5 6 */
0x00000000,0x10000000,0x00010000,0x10010000,
0x00000004,0x10000004,0x00010004,0x10010004,
0x20000000,0x30000000,0x20010000,0x30010000,
0x20000004,0x30000004,0x20010004,0x30010004,
0x00100000,0x10100000,0x00110000,0x10110000,
0x00100004,0x10100004,0x00110004,0x10110004,
0x20100000,0x30100000,0x20110000,0x30110000,
0x20100004,0x30100004,0x20110004,0x30110004,
0x00001000,0x10001000,0x00011000,0x10011000,
0x00001004,0x10001004,0x00011004,0x10011004,
0x20001000,0x30001000,0x20011000,0x30011000,
0x20001004,0x30001004,0x20011004,0x30011004,
0x00101000,0x10101000,0x00111000,0x10111000,
0x00101004,0x10101004,0x00111004,0x10111004,
0x20101000,0x30101000,0x20111000,0x30111000,
0x20101004,0x30101004,0x20111004,0x30111004,
},
{/* for D bits (numbered as per FIPS 46) 8 9 11 12 13 14 */
0x00000000,0x08000000,0x00000008,0x08000008,
0x00000400,0x08000400,0x00000408,0x08000408,
0x00020000,0x08020000,0x00020008,0x08020008,
0x00020400,0x08020400,0x00020408,0x08020408,
0x00000001,0x08000001,0x00000009,0x08000009,
0x00000401,0x08000401,0x00000409,0x08000409,
0x00020001,0x08020001,0x00020009,0x08020009,
0x00020401,0x08020401,0x00020409,0x08020409,
0x02000000,0x0A000000,0x02000008,0x0A000008,
0x02000400,0x0A000400,0x02000408,0x0A000408,
0x02020000,0x0A020000,0x02020008,0x0A020008,
0x02020400,0x0A020400,0x02020408,0x0A020408,
0x02000001,0x0A000001,0x02000009,0x0A000009,
0x02000401,0x0A000401,0x02000409,0x0A000409,
0x02020001,0x0A020001,0x02020009,0x0A020009,
0x02020401,0x0A020401,0x02020409,0x0A020409,
},
{/* for D bits (numbered as per FIPS 46) 16 17 18 19 20 21 */
0x00000000,0x00000100,0x00080000,0x00080100,
0x01000000,0x01000100,0x01080000,0x01080100,
0x00000010,0x00000110,0x00080010,0x00080110,
0x01000010,0x01000110,0x01080010,0x01080110,
0x00200000,0x00200100,0x00280000,0x00280100,
0x01200000,0x01200100,0x01280000,0x01280100,
0x00200010,0x00200110,0x00280010,0x00280110,
0x01200010,0x01200110,0x01280010,0x01280110,
0x00000200,0x00000300,0x00080200,0x00080300,
0x01000200,0x01000300,0x01080200,0x01080300,
0x00000210,0x00000310,0x00080210,0x00080310,
0x01000210,0x01000310,0x01080210,0x01080310,
0x00200200,0x00200300,0x00280200,0x00280300,
0x01200200,0x01200300,0x01280200,0x01280300,
0x00200210,0x00200310,0x00280210,0x00280310,
0x01200210,0x01200310,0x01280210,0x01280310,
},
{/* for D bits (numbered as per FIPS 46) 22 23 24 25 27 28 */
0x00000000,0x04000000,0x00040000,0x04040000,
0x00000002,0x04000002,0x00040002,0x04040002,
0x00002000,0x04002000,0x00042000,0x04042000,
0x00002002,0x04002002,0x00042002,0x04042002,
0x00000020,0x04000020,0x00040020,0x04040020,
0x00000022,0x04000022,0x00040022,0x04040022,
0x00002020,0x04002020,0x00042020,0x04042020,
0x00002022,0x04002022,0x00042022,0x04042022,
0x00000800,0x04000800,0x00040800,0x04040800,
0x00000802,0x04000802,0x00040802,0x04040802,
0x00002800,0x04002800,0x00042800,0x04042800,
0x00002802,0x04002802,0x00042802,0x04042802,
0x00000820,0x04000820,0x00040820,0x04040820,
0x00000822,0x04000822,0x00040822,0x04040822,
0x00002820,0x04002820,0x00042820,0x04042820,
0x00002822,0x04002822,0x00042822,0x04042822,
}};

/*--------------------------------------------------------------------*/

/* See ecb_encrypt.c for a pseudo description of these macros.
 */

#define PERM_OP(a,b,t,n,m) ((t)=((((a)>>(n))^(b))&(m)),\
        (b)^=(t),\
        (a)^=((t)<<(n)))

#define HPERM_OP(a,t,n,m) ((t)=((((a)<<(16-(n)))^(a))&(m)),\
        (a)=(a)^(t)^(t>>(16-(n))))\

static char shifts2[16]={0,0,1,1,1,1,1,1,0,1,1,1,1,1,1,0};

/*--------------------------------------------------------------------*/
static void
des_set_key (des_cblock *key, des_key_schedule schedule)

{
    register unsigned long c, d, t, s;
    register unsigned char *in;
    unsigned long *k;
    register int i;

    k = (unsigned long *)schedule;
    in = (crypt_uchar *)key;

    c2l(in,c);
    c2l(in,d);

    /* do PC1 in 60 simple operations */
    PERM_OP(d,c,t,4,0x0f0f0f0f);
    HPERM_OP(c,t,-2, 0xcccc0000);
    HPERM_OP(c,t,-1, 0xaaaa0000);
    HPERM_OP(c,t, 8, 0x00ff0000);
    HPERM_OP(c,t,-1, 0xaaaa0000);
    HPERM_OP(d,t,-8, 0xff000000);
    HPERM_OP(d,t, 8, 0x00ff0000);
    HPERM_OP(d,t, 2, 0x33330000);
    d = ((d&0x00aa00aa)<<7)|((d&0x55005500)>>7)|(d&0xaa55aa55);
    d = (d>>8)|((c&0xf0000000)>>4);
    c &= 0x0fffffff;

    for (i = 0; i < ITERATIONS; i++)
    {
        if (shifts2[i])
        {
            c = ((c>>2)|(c<<26));
            d = ((d>>2)|(d<<26));
        }
        else
        {
            c = ((c>>1)|(c<<27));
            d = ((d>>1)|(d<<27));
        }
        c &= 0x0fffffff;
        d &= 0x0fffffff;

        /* could be a few less shifts but I am to lazy at this
         * point in time to investigate
         */
        s = skb[0][ (c    )&0x3f                ]|
            skb[1][((c>> 6)&0x03)|((c>> 7)&0x3c)]|
            skb[2][((c>>13)&0x0f)|((c>>14)&0x30)]|
            skb[3][((c>>20)&0x01)|((c>>21)&0x06) |
                                              ((c>>22)&0x38)];
        t = skb[4][ (d    )&0x3f                ]|
            skb[5][((d>> 7)&0x03)|((d>> 8)&0x3c)]|
            skb[6][ (d>>15)&0x3f                ]|
            skb[7][((d>>21)&0x0f)|((d>>22)&0x30)];

        /* table contained 0213 4657 */
        *(k++) = ((t<<16)|(s&0x0000ffff));
        s      = ((s>>16)|(t&0xffff0000));

        s = (s<<4)|(s>>28);
        *(k++) = s;
    }
}

/*--------------------------------------------------------------------*/
/******************************************************************
 * modified stuff for crypt.
 ******************************************************************/

#define D_ENCRYPT(L,R,S)        \
        t=(R<<1)|(R>>31); \
        v=(t^(t>>16)); \
        u=(v&E0); \
        v=(v&E1); \
        u=(u^(u<<16))^t^s[S  ]; \
        t=(v^(v<<16))^t^s[S+1]; \
        t=(t>>4)|(t<<28); \
        L^=        SPtrans[1][(t    )&0x3f]| \
                SPtrans[3][(t>> 8)&0x3f]| \
                SPtrans[5][(t>>16)&0x3f]| \
                SPtrans[7][(t>>24)&0x3f]| \
                SPtrans[0][(u    )&0x3f]| \
                SPtrans[2][(u>> 8)&0x3f]| \
                SPtrans[4][(u>>16)&0x3f]| \
                SPtrans[6][(u>>24)&0x3f];

#define PERM_OP(a,b,t,n,m) ((t)=((((a)>>(n))^(b))&(m)),\
        (b)^=(t),\
        (a)^=((t)<<(n)))

/*--------------------------------------------------------------------*/
static crypt_uchar con_salt[128]={
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,
0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,
0x0A,0x0B,0x05,0x06,0x07,0x08,0x09,0x0A,
0x0B,0x0C,0x0D,0x0E,0x0F,0x10,0x11,0x12,
0x13,0x14,0x15,0x16,0x17,0x18,0x19,0x1A,
0x1B,0x1C,0x1D,0x1E,0x1F,0x20,0x21,0x22,
0x23,0x24,0x25,0x20,0x21,0x22,0x23,0x24,
0x25,0x26,0x27,0x28,0x29,0x2A,0x2B,0x2C,
0x2D,0x2E,0x2F,0x30,0x31,0x32,0x33,0x34,
0x35,0x36,0x37,0x38,0x39,0x3A,0x3B,0x3C,
0x3D,0x3E,0x3F,0x00,0x00,0x00,0x00,0x00,
};

static crypt_uchar cov_2char[64]={
0x2E,0x2F,0x30,0x31,0x32,0x33,0x34,0x35,
0x36,0x37,0x38,0x39,0x41,0x42,0x43,0x44,
0x45,0x46,0x47,0x48,0x49,0x4A,0x4B,0x4C,
0x4D,0x4E,0x4F,0x50,0x51,0x52,0x53,0x54,
0x55,0x56,0x57,0x58,0x59,0x5A,0x61,0x62,
0x63,0x64,0x65,0x66,0x67,0x68,0x69,0x6A,
0x6B,0x6C,0x6D,0x6E,0x6F,0x70,0x71,0x72,
0x73,0x74,0x75,0x76,0x77,0x78,0x79,0x7A
};

/*--------------------------------------------------------------------*/
char *
crypt (const char *buf, const char *salt)

/* Encrypt string <buf> using the first two characters of <salt> as
 * seed for the algorithm. The result is the encrypted string, stored
 * in a static buffer, whose first two characters are copies of <salt>.
 */

{
    static crypt_uchar buff[20];

    unsigned int i, j, x, y;
    crypt_ulong Eswap0 = 0;
    crypt_ulong Eswap1 = 0;
    crypt_ulong out[2], ll;
    des_cblock key;
    des_key_schedule ks;
    crypt_uchar bb[9];
    crypt_uchar *b = bb;
    crypt_uchar c, u;

    x = buff[0] = salt[0];
    Eswap0 = con_salt[x];
    x = buff[1] = salt[1];
    Eswap1 = con_salt[x] << 4;

    for (i = 0; i < 8; i++)
    {
        c = *(buf++);
       if (!c)
           break;
       key[i] = (c << 1);
    }

    for (; i < 8; i++)
        key[i] = 0;

    des_set_key((des_cblock *)(key), ks);
    body(&out[0], &out[1], &ks, Eswap0, Eswap1);

    ll = out[0]; l2c(ll,b);
    ll = out[1]; l2c(ll,b);

    y = 0;
    u = 0x80;
    bb[8] = 0;
    for (i = 2; i < 13; i++)
    {
        c = 0;
        for (j = 0; j < 6; j++)
        {
            c <<= 1;
            if (bb[y] & u)
                c |= 1;
            u >>= 1;
            if (!u)
            {
                y++;
                u = 0x80;
            }
        }
        buff[i] = cov_2char[c];
    }

    return((char *)buff);
}

/*--------------------------------------------------------------------*/
static void
body (crypt_ulong *out0
     , crypt_ulong *out1
     , des_key_schedule *ks
     , crypt_ulong Eswap0
     , crypt_ulong Eswap1)

{
    register unsigned long l, r, t, u, v;
    register unsigned long *s;
    register int i, j;
    register unsigned long E0, E1;

    l = 0;
    r = 0;

    s = (crypt_ulong *)ks;
    E0 = Eswap0;
    E1 = Eswap1;

    for (j = 0; j < 25; j++)
    {
        for (i = 0; i < (ITERATIONS*2); i += 4)
        {
            D_ENCRYPT(l,r, i  );  /* 1 */
            D_ENCRYPT(r,l, i+2);  /* 2 */
        }
        t = l;
        l = r;
        r = t;
    }

    t = l;
    l = r;
    r = t;

    PERM_OP(r,l,t, 1,0x55555555);
    PERM_OP(l,r,t, 8,0x00ff00ff);
    PERM_OP(r,l,t, 2,0x33333333);
    PERM_OP(l,r,t,16,0x0000ffff);
    PERM_OP(r,l,t, 4,0x0f0f0f0f);

    *out0 = l;
    *out1 = r;
}

/***************************************************************************/