crypto/des/fcrypt.c

   1 /* NOCW */
   2 #include <stdio.h>
   3 #ifdef _OSD_POSIX
   4 #ifndef CHARSET_EBCDIC
   5 #define CHARSET_EBCDIC 1
   6 #endif
   7 #endif
   8 #ifdef CHARSET_EBCDIC
   9 #include <openssl/ebcdic.h>
  10 #endif
  11
  12 /* This version of crypt has been developed from my MIT compatible
  13  * DES library.
  14  * Eric Young (eay@cryptsoft.com)
  15  */
  16
  17 /* Modification by Jens Kupferschmidt (Cu)
  18  * I have included directive PARA for shared memory computers.
  19  * I have included a directive LONGCRYPT to using this routine to cipher
  20  * passwords with more then 8 bytes like HP-UX 10.x it used. The MAXPLEN
  21  * definition is the maximum of length of password and can changed. I have
  22  * defined 24.
  23  */
  24
  25 #include <openssl/crypto.h>
  26 #include "des_locl.h"
  27
  28 /* Added more values to handle illegal salt values the way normal
  29  * crypt() implementations do.  The patch was sent by
  30  * Bjorn Gronvall <bg@sics.se>
  31  */
  32 static unsigned const char con_salt[128]={
  33 0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,
  34 0xDA,0xDB,0xDC,0xDD,0xDE,0xDF,0xE0,0xE1,
  35 0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,
  36 0xEA,0xEB,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,
  37 0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,
  38 0xFA,0xFB,0xFC,0xFD,0xFE,0xFF,0x00,0x01,
  39 0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,
  40 0x0A,0x0B,0x05,0x06,0x07,0x08,0x09,0x0A,
  41 0x0B,0x0C,0x0D,0x0E,0x0F,0x10,0x11,0x12,
  42 0x13,0x14,0x15,0x16,0x17,0x18,0x19,0x1A,
  43 0x1B,0x1C,0x1D,0x1E,0x1F,0x20,0x21,0x22,
  44 0x23,0x24,0x25,0x20,0x21,0x22,0x23,0x24,
  45 0x25,0x26,0x27,0x28,0x29,0x2A,0x2B,0x2C,
  46 0x2D,0x2E,0x2F,0x30,0x31,0x32,0x33,0x34,
  47 0x35,0x36,0x37,0x38,0x39,0x3A,0x3B,0x3C,
  48 0x3D,0x3E,0x3F,0x40,0x41,0x42,0x43,0x44,
  49 };
  50
  51 static unsigned const char cov_2char[64]={
  52 0x2E,0x2F,0x30,0x31,0x32,0x33,0x34,0x35,
  53 0x36,0x37,0x38,0x39,0x41,0x42,0x43,0x44,
  54 0x45,0x46,0x47,0x48,0x49,0x4A,0x4B,0x4C,
  55 0x4D,0x4E,0x4F,0x50,0x51,0x52,0x53,0x54,
  56 0x55,0x56,0x57,0x58,0x59,0x5A,0x61,0x62,
  57 0x63,0x64,0x65,0x66,0x67,0x68,0x69,0x6A,
  58 0x6B,0x6C,0x6D,0x6E,0x6F,0x70,0x71,0x72,
  59 0x73,0x74,0x75,0x76,0x77,0x78,0x79,0x7A
  60 };
  61
  62 char *DES_crypt(const char *buf, const char *salt)
  63         {
  64         static char buff[14];
  65
  66 #ifndef CHARSET_EBCDIC
  67         return(DES_fcrypt(buf,salt,buff));
  68 #else
  69         char e_salt[2+1];
  70         char e_buf[32+1];       /* replace 32 by 8 ? */
  71         char *ret;
  72
  73         /* Copy at most 2 chars of salt */
  74         if ((e_salt[0] = salt[0]) != '\0')
  75             e_salt[1] = salt[1];
  76
  77         /* Copy at most 32 chars of password */
  78         strncpy (e_buf, buf, sizeof(e_buf));
  79
  80         /* Make sure we have a delimiter */
  81         e_salt[sizeof(e_salt)-1] = e_buf[sizeof(e_buf)-1] = '\0';
  82
  83         /* Convert the e_salt to ASCII, as that's what DES_fcrypt works on */
  84         ebcdic2ascii(e_salt, e_salt, sizeof e_salt);
  85
  86         /* Convert the cleartext password to ASCII */
  87         ebcdic2ascii(e_buf, e_buf, sizeof e_buf);
  88
  89         /* Encrypt it (from/to ASCII) */
  90         ret = DES_fcrypt(e_buf,e_salt,buff);
  91
  92         /* Convert the result back to EBCDIC */
  93         ascii2ebcdic(ret, ret, strlen(ret));
  94
  95         return ret;
  96 #endif
  97         }
  98
  99
 100 char *DES_fcrypt(const char *buf, const char *salt, char *ret)
 101         {
 102         unsigned int i,j,x,y;
 103         DES_LONG Eswap0,Eswap1;
 104         DES_LONG out[2],ll;
 105         DES_cblock key;
 106         DES_key_schedule ks;
 107         unsigned char bb[9];
 108         unsigned char *b=bb;
 109         unsigned char c,u;
 110
 111         /* eay 25/08/92
 112          * If you call crypt("pwd","*") as often happens when you
 113          * have * as the pwd field in /etc/passwd, the function
 114          * returns *\0XXXXXXXXX
 115          * The \0 makes the string look like * so the pwd "*" would
 116          * crypt to "*".  This was found when replacing the crypt in
 117          * our shared libraries.  People found that the disabled
 118          * accounts effectively had no passwd :-(. */
 119 #ifndef CHARSET_EBCDIC
 120         x=ret[0]=((salt[0] == '\0')?'A':salt[0]);
 121         Eswap0=con_salt[x]<<2;
 122         x=ret[1]=((salt[1] == '\0')?'A':salt[1]);
 123         Eswap1=con_salt[x]<<6;
 124 #else
 125         x=ret[0]=((salt[0] == '\0')?os_toascii['A']:salt[0]);
 126         Eswap0=con_salt[x]<<2;
 127         x=ret[1]=((salt[1] == '\0')?os_toascii['A']:salt[1]);
 128         Eswap1=con_salt[x]<<6;
 129 #endif
 130
 131 /* EAY
 132 r=strlen(buf);
 133 r=(r+7)/8;
 134 */
 135         for (i=0; i<8; i++)
 136                 {
 137                 c= *(buf++);
 138                 if (!c) break;
 139                 key[i]=(c<<1);
 140                 }
 141         for (; i<8; i++)
 142                 key[i]=0;
 143
 144         DES_set_key_unchecked(&key,&ks);
 145         fcrypt_body(&(out[0]),&ks,Eswap0,Eswap1);
 146
 147         ll=out[0]; l2c(ll,b);
 148         ll=out[1]; l2c(ll,b);
 149         y=0;
 150         u=0x80;
 151         bb[8]=0;
 152         for (i=2; i<13; i++)
 153                 {
 154                 c=0;
 155                 for (j=0; j<6; j++)
 156                         {
 157                         c<<=1;
 158                         if (bb[y] & u) c|=1;
 159                         u>>=1;
 160                         if (!u)
 161                                 {
 162                                 y++;
 163                                 u=0x80;
 164                                 }
 165                         }
 166                 ret[i]=cov_2char[c];
 167                 }
 168         ret[13]='\0';
 169         return(ret);
 170         }
 171