lib/libskey/skey_crypt.c

   1 /* Author: Wietse Venema, Eindhoven University of Technology. */
   2 /* $DragonFly: src/lib/libskey/skey_crypt.c,v 1.2 2008/09/30 16:57:05 swildner Exp $ */
   3
   4 #include <string.h>
   5 #include <stdio.h>
   6 #include <pwd.h>
   7 #include <unistd.h>
   8
   9 #include "skey.h"
  10
  11 /* skey_crypt - return encrypted UNIX passwd if s/key or regular password ok */
  12
  13 const char *
  14 skey_crypt(char *pp, char *salt, struct passwd *pwd, int pwok)
  15 {
  16     struct skey skey;
  17     char   *p;
  18
  19     /* Try s/key authentication even when the UNIX password is permitted. */
  20
  21     if (pwd != 0 && skeyinfo(&skey, pwd->pw_name, (char *) 0) == 0
  22         && skeyverify(&skey, pp) == 0) {
  23         /* s/key authentication succeeded */
  24         return (pwd->pw_passwd);
  25     }
  26
  27     /* When s/key authentication does not work, always invoke crypt(). */
  28
  29     p = crypt(pp, salt);
  30     if (pwok && pwd != 0 && strcmp(p, pwd->pw_passwd) == 0)
  31         return (pwd->pw_passwd);
  32
  33     /* The user does not exist or entered bad input. */
  34
  35     return (":");
  36 }