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  * The library is available at pub/Crypto/DES at ftp.psy.uq.oz.au
  15  * Eric Young (eay@cryptsoft.com)
  16  */
  17
  18 /* Modification by Jens Kupferschmidt (Cu)
  19  * I have included directive PARA for shared memory computers.
  20  * I have included a directive LONGCRYPT to using this routine to cipher
  21  * passwords with more then 8 bytes like HP-UX 10.x it used. The MAXPLEN
  22  * definition is the maximum of length of password and can changed. I have
  23  * defined 24.
  24  */
  25
  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 void fcrypt_body(DES_LONG *out,des_key_schedule ks,
  63         DES_LONG Eswap0, DES_LONG Eswap1);
  64
  65 #if !defined(PERL5) && !defined(__FreeBSD__) && !defined(NeXT)
  66 char *crypt(const char *buf, const char *salt)
  67         {
  68         return(des_crypt(buf, salt));
  69         }
  70 #endif
  71
  72 char *des_crypt(const char *buf, const char *salt)
  73         {
  74         static char buff[14];
  75
  76 #ifndef CHARSET_EBCDIC
  77         return(des_fcrypt(buf,salt,buff));
  78 #else
  79         char e_salt[2+1];
  80         char e_buf[32+1];       /* replace 32 by 8 ? */
  81         char *ret;
  82
  83         /* Copy at most 2 chars of salt */
  84         if ((e_salt[0] = salt[0]) != '\0')
  85             e_salt[1] = salt[1];
  86
  87         /* Copy at most 32 chars of password */
  88         strncpy (e_buf, buf, sizeof(e_buf));
  89
  90         /* Make sure we have a delimiter */
  91         e_salt[sizeof(e_salt)-1] = e_buf[sizeof(e_buf)-1] = '\0';
  92
  93         /* Convert the e_salt to ASCII, as that's what des_fcrypt works on */
  94         ebcdic2ascii(e_salt, e_salt, sizeof e_salt);
  95
  96         /* Convert the cleartext password to ASCII */
  97         ebcdic2ascii(e_buf, e_buf, sizeof e_buf);
  98
  99         /* Encrypt it (from/to ASCII) */
 100         ret = des_fcrypt(e_buf,e_salt,buff);
 101
 102         /* Convert the result back to EBCDIC */
 103         ascii2ebcdic(ret, ret, strlen(ret));
 104
 105         return ret;
 106 #endif
 107         }
 108
 109
 110 char *des_fcrypt(const char *buf, const char *salt, char *ret)
 111         {
 112         unsigned int i,j,x,y;
 113         DES_LONG Eswap0,Eswap1;
 114         DES_LONG out[2],ll;
 115         des_cblock key;
 116         des_key_schedule ks;
 117         unsigned char bb[9];
 118         unsigned char *b=bb;
 119         unsigned char c,u;
 120
 121         /* eay 25/08/92
 122          * If you call crypt("pwd","*") as often happens when you
 123          * have * as the pwd field in /etc/passwd, the function
 124          * returns *\0XXXXXXXXX
 125          * The \0 makes the string look like * so the pwd "*" would
 126          * crypt to "*".  This was found when replacing the crypt in
 127          * our shared libraries.  People found that the disabled
 128          * accounts effectively had no passwd :-(. */
 129 #ifndef CHARSET_EBCDIC
 130         x=ret[0]=((salt[0] == '\0')?'A':salt[0]);
 131         Eswap0=con_salt[x]<<2;
 132         x=ret[1]=((salt[1] == '\0')?'A':salt[1]);
 133         Eswap1=con_salt[x]<<6;
 134 #else
 135         x=ret[0]=((salt[0] == '\0')?os_toascii['A']:salt[0]);
 136         Eswap0=con_salt[x]<<2;
 137         x=ret[1]=((salt[1] == '\0')?os_toascii['A']:salt[1]);
 138         Eswap1=con_salt[x]<<6;
 139 #endif
 140
 141 /* EAY
 142 r=strlen(buf);
 143 r=(r+7)/8;
 144 */
 145         for (i=0; i<8; i++)
 146                 {
 147                 c= *(buf++);
 148                 if (!c) break;
 149                 key[i]=(c<<1);
 150                 }
 151         for (; i<8; i++)
 152                 key[i]=0;
 153
 154         des_set_key_unchecked(&key,ks);
 155         fcrypt_body(&(out[0]),ks,Eswap0,Eswap1);
 156
 157         ll=out[0]; l2c(ll,b);
 158         ll=out[1]; l2c(ll,b);
 159         y=0;
 160         u=0x80;
 161         bb[8]=0;
 162         for (i=2; i<13; i++)
 163                 {
 164                 c=0;
 165                 for (j=0; j<6; j++)
 166                         {
 167                         c<<=1;
 168                         if (bb[y] & u) c|=1;
 169                         u>>=1;
 170                         if (!u)
 171                                 {
 172                                 y++;
 173                                 u=0x80;
 174                                 }
 175                         }
 176                 ret[i]=cov_2char[c];
 177                 }
 178         ret[13]='\0';
 179         return(ret);
 180         }
 181