lib/libskey/skey_crypt.c

   1 /* Author: Wietse Venema, Eindhoven University of Technology. */
   2
   3 #include <string.h>
   4 #include <stdio.h>
   5 #include <pwd.h>
   6 #include <unistd.h>
   7
   8 #include "skey.h"
   9
  10 /* skey_crypt - return encrypted UNIX passwd if s/key or regular password ok */
  11
  12 const char *skey_crypt(pp, salt, pwd, pwok)
  13 char *pp;
  14 char *salt;
  15 struct passwd *pwd;
  16 int     pwok;
  17 {
  18     struct skey skey;
  19     char   *p;
  20
  21     /* Try s/key authentication even when the UNIX password is permitted. */
  22
  23     if (pwd != 0 && skeyinfo(&skey, pwd->pw_name, (char *) 0) == 0
  24         && skeyverify(&skey, pp) == 0) {
  25         /* s/key authentication succeeded */
  26         return (pwd->pw_passwd);
  27     }
  28
  29     /* When s/key authentication does not work, always invoke crypt(). */
  30
  31     p = crypt(pp, salt);
  32     if (pwok && pwd != 0 && strcmp(p, pwd->pw_passwd) == 0)
  33         return (pwd->pw_passwd);
  34
  35     /* The user does not exist or entered bad input. */
  36
  37     return (":");
  38 }