utils/strcrypt.cc

   1 #include "strutils.h"
   2 #include <crypt.h>
   3
   4 #include <unistd.h>
   5 #include <stdlib.h>
   6
   7 /**.
   8  * Before calling this function, you should call srandom().
   9  * When 2 identical strings are encrypted, they will not return the same
  10  * encryption. Also, str does not need to be less than 8 chars as UNIX crypt
  11  * says, although it only works on the first 8 characters.
  12  */
  13 WvString passwd_crypt(const char *str)
  14 {
  15     static char saltchars[] =
  16         "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789./";
  17     char salt[3], *result;
  18
  19     salt[0] = saltchars[random() % (sizeof(saltchars) - 1)];
  20     salt[1] = saltchars[random() % (sizeof(saltchars) - 1)];
  21     salt[2] = 0;
  22
  23     result = crypt(str, salt);
  24     if (!result)
  25         return "*";
  26
  27     WvString s(result);
  28     return s;
  29 }
  30
  31 /**.
  32  * Before calling this function, you should call srandom().
  33  * When 2 identical strings are encrypted, they will not return the same
  34  * encryption. Also, str does not need to be less than 8 chars as we're
  35  * using the glibc md5 algorithm.
  36  */
  37 WvString passwd_md5(const char *str)
  38 {
  39     static char saltchars[] =
  40         "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789./";
  41     char salt[12], *result;
  42
  43     salt[0] = '$';
  44     salt[1] = '1';
  45     salt[2] = '$';
  46
  47     for (int i = 3; i < 11; ++i)
  48         salt[i] = saltchars[random() % (sizeof(saltchars) - 1)];
  49
  50     salt[11] = 0;
  51
  52     result = crypt(str, salt);
  53     if (!result)
  54         return "*";
  55
  56     WvString s(result);
  57     return s;
  58 }