crypto/external/bsd/openssl/lib/libdes/ofcrypt.c

   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@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@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