utils/strcrypt.cc

   1 #include "strutils.h"
   2 #ifndef MACOS
   3   #include <crypt.h>
   4 #endif
   5 #include <unistd.h>
   6 #include <stdlib.h>
   7
   8 /**.
   9  * Before calling this function, you should call srandom().
  10  * When 2 identical strings are encrypted, they will not return the same
  11  * encryption. Also, str does not need to be less than 8 chars as UNIX crypt
  12  * says, although it only works on the first 8 characters.
  13  */
  14 WvString passwd_crypt(const char *str)
  15 {
  16     static char saltchars[] =
  17         "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789./";
  18     char salt[3], *result;
  19
  20     salt[0] = saltchars[random() % (sizeof(saltchars) - 1)];
  21     salt[1] = saltchars[random() % (sizeof(saltchars) - 1)];
  22     salt[2] = 0;
  23
  24     result = crypt(str, salt);
  25     if (!result)
  26         return "*";
  27
  28     WvString s(result);
  29     return s;
  30 }
  31
  32 /**.
  33  * Before calling this function, you should call srandom().
  34  * When 2 identical strings are encrypted, they will not return the same
  35  * encryption. Also, str does not need to be less than 8 chars as we're
  36  * using the glibc md5 algorithm.
  37  */
  38 WvString passwd_md5(const char *str)
  39 {
  40     static char saltchars[] =
  41         "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789./";
  42     char salt[12], *result;
  43
  44     salt[0] = '$';
  45     salt[1] = '1';
  46     salt[2] = '$';
  47
  48     for (int i = 3; i < 11; ++i)
  49         salt[i] = saltchars[random() % (sizeof(saltchars) - 1)];
  50
  51     salt[11] = 0;
  52
  53     result = crypt(str, salt);
  54     if (!result)
  55         return "*";
  56
  57     WvString s(result);
  58     return s;
  59 }