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      1 /* NOCW */
      2 #include <stdio.h>
      3 
      4 /* This version of crypt has been developed from my MIT compatible
      5  * DES library.
      6  * Eric Young (eay (at) cryptsoft.com)
      7  */
      8 
      9 /* Modification by Jens Kupferschmidt (Cu)
     10  * I have included directive PARA for shared memory computers.
     11  * I have included a directive LONGCRYPT to using this routine to cipher
     12  * passwords with more than 8 bytes like HP-UX 10.x it used. The MAXPLEN
     13  * definition is the maximum of length of password and can changed. I have
     14  * defined 24.
     15  */
     16 
     17 #include "des_locl.h"
     18 
     19 /* Added more values to handle illegal salt values the way normal
     20  * crypt() implementations do.  The patch was sent by
     21  * Bjorn Gronvall <bg (at) sics.se>
     22  */
     23 static unsigned const char con_salt[128]={
     24 0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,
     25 0xDA,0xDB,0xDC,0xDD,0xDE,0xDF,0xE0,0xE1,
     26 0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,
     27 0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,
     28 0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,
     29 0xFA,0xFB,0xFC,0xFD,0xFE,0xFF,0x00,0x01,
     30 0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,
     31 0x0A,0x0B,0x05,0x06,0x07,0x08,0x09,0x0A,
     32 0x0B,0x0C,0x0D,0x0E,0x0F,0x10,0x11,0x12,
     33 0x13,0x14,0x15,0x16,0x17,0x18,0x19,0x1A,
     34 0x1B,0x1C,0x1D,0x1E,0x1F,0x20,0x21,0x22,
     35 0x23,0x24,0x25,0x20,0x21,0x22,0x23,0x24,
     36 0x25,0x26,0x27,0x28,0x29,0x2A,0x2B,0x2C,
     37 0x2D,0x2E,0x2F,0x30,0x31,0x32,0x33,0x34,
     38 0x35,0x36,0x37,0x38,0x39,0x3A,0x3B,0x3C,
     39 0x3D,0x3E,0x3F,0x40,0x41,0x42,0x43,0x44,
     40 };
     41 
     42 static unsigned const char cov_2char[64]={
     43 0x2E,0x2F,0x30,0x31,0x32,0x33,0x34,0x35,
     44 0x36,0x37,0x38,0x39,0x41,0x42,0x43,0x44,
     45 0x45,0x46,0x47,0x48,0x49,0x4A,0x4B,0x4C,
     46 0x4D,0x4E,0x4F,0x50,0x51,0x52,0x53,0x54,
     47 0x55,0x56,0x57,0x58,0x59,0x5A,0x61,0x62,
     48 0x63,0x64,0x65,0x66,0x67,0x68,0x69,0x6A,
     49 0x6B,0x6C,0x6D,0x6E,0x6F,0x70,0x71,0x72,
     50 0x73,0x74,0x75,0x76,0x77,0x78,0x79,0x7A
     51 };
     52 
     53 void fcrypt_body(DES_LONG *out,des_key_schedule ks,
     54 	DES_LONG Eswap0, DES_LONG Eswap1);
     55 
     56 char *des_crypt(const char *buf, const char *salt)
     57 	{
     58 	static char buff[14];
     59 
     60 #ifndef CHARSET_EBCDIC
     61 	return(des_fcrypt(buf,salt,buff));
     62 #else
     63 	char e_salt[2+1];
     64 	char e_buf[32+1];	/* replace 32 by 8 ? */
     65 	char *ret;
     66 
     67 	/* Copy at most 2 chars of salt */
     68 	if ((e_salt[0] = salt[0]) != '\0')
     69 	    e_salt[1] = salt[1];
     70 
     71 	/* Copy at most 32 chars of password */
     72 	strncpy (e_buf, buf, sizeof(e_buf));
     73 
     74 	/* Make sure we have a delimiter */
     75 	e_salt[sizeof(e_salt)-1] = e_buf[sizeof(e_buf)-1] = '\0';
     76 
     77 	/* Convert the e_salt to ASCII, as that's what des_fcrypt works on */
     78 	ebcdic2ascii(e_salt, e_salt, sizeof e_salt);
     79 
     80 	/* Convert the cleartext password to ASCII */
     81 	ebcdic2ascii(e_buf, e_buf, sizeof e_buf);
     82 
     83 	/* Encrypt it (from/to ASCII) */
     84 	ret = des_fcrypt(e_buf,e_salt,buff);
     85 
     86 	/* Convert the result back to EBCDIC */
     87 	ascii2ebcdic(ret, ret, strlen(ret));
     88 
     89 	return ret;
     90 #endif
     91 	}
     92 
     93 
     94 char *des_fcrypt(const char *buf, const char *salt, char *ret)
     95 	{
     96 	unsigned int i,j,x,y;
     97 	DES_LONG Eswap0,Eswap1;
     98 	DES_LONG out[2],ll;
     99 	des_cblock key;
    100 	des_key_schedule ks;
    101 	unsigned char bb[9];
    102 	unsigned char *b=bb;
    103 	unsigned char c,u;
    104 
    105 	/* eay 25/08/92
    106 	 * If you call crypt("pwd","*") as often happens when you
    107 	 * have * as the pwd field in /etc/passwd, the function
    108 	 * returns *\0XXXXXXXXX
    109 	 * The \0 makes the string look like * so the pwd "*" would
    110 	 * crypt to "*".  This was found when replacing the crypt in
    111 	 * our shared libraries.  People found that the disabled
    112 	 * accounts effectively had no passwd :-(. */
    113 #ifndef CHARSET_EBCDIC
    114 	x=ret[0]=((salt[0] == '\0')?'A':salt[0]);
    115 	Eswap0=con_salt[x]<<2;
    116 	x=ret[1]=((salt[1] == '\0')?'A':salt[1]);
    117 	Eswap1=con_salt[x]<<6;
    118 #else
    119 	x=ret[0]=((salt[0] == '\0')?os_toascii['A']:salt[0]);
    120 	Eswap0=con_salt[x]<<2;
    121 	x=ret[1]=((salt[1] == '\0')?os_toascii['A']:salt[1]);
    122 	Eswap1=con_salt[x]<<6;
    123 #endif
    124 
    125 /* EAY
    126 r=strlen(buf);
    127 r=(r+7)/8;
    128 */
    129 	for (i=0; i<8; i++)
    130 		{
    131 		c= *(buf++);
    132 		if (!c) break;
    133 		key[i]=(c<<1);
    134 		}
    135 	for (; i<8; i++)
    136 		key[i]=0;
    137 
    138 	des_set_key_unchecked(&key,ks);
    139 	fcrypt_body(&(out[0]),ks,Eswap0,Eswap1);
    140 
    141 	ll=out[0]; l2c(ll,b);
    142 	ll=out[1]; l2c(ll,b);
    143 	y=0;
    144 	u=0x80;
    145 	bb[8]=0;
    146 	for (i=2; i<13; i++)
    147 		{
    148 		c=0;
    149 		for (j=0; j<6; j++)
    150 			{
    151 			c<<=1;
    152 			if (bb[y] & u) c|=1;
    153 			u>>=1;
    154 			if (!u)
    155 				{
    156 				y++;
    157 				u=0x80;
    158 				}
    159 			}
    160 		ret[i]=cov_2char[c];
    161 		}
    162 	ret[13]='\0';
    163 	return(ret);
    164 	}
    165 
    166