Date: Thu, 23 Sep 1999 09:14:39 +0800 (HKT)
From: Wong Chun Fung Gary <gary AT cs DOT ust DOT hk>
To: Eli Zaretskii <eliz AT is DOT elta DOT co DOT il>
cc: djgpp AT delorie DOT com
Subject: Re: Crypt()
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On Wed, 22 Sep 1999, Eli Zaretskii wrote:
> 
> On 22 Sep 1999, Wong Chun Fung Gary wrote:
> 
> > How can I get crypt work in DJGPP?
> > I've got to implement a password checking function.
> 
> It would help if you explain what are your problems in implementing
> ``a password checking function''.  If you mean you need to read a 
> password from the user without echoing, you can use the library function 
> `getpass' or `getlongpass'.

 In fact, I would like to use the crypt function on most UN*X system.
 This is the one I want to have:

 $ man crypt

 CRYPT(3)                Library functions                CRYPT(3)

NAME
       crypt - password and data encryption

SYNOPSIS
       #define _XOPEN_SOURCE
       #include <unistd.h>

       char *crypt(const char *key, const char *salt);

DESCRIPTION
       crypt is the password encryption function.  It is based on
       the Data Encryption  Standard  algorithm  with  variations
       intended  (among  other things) to discourage use of hard-
       ware implementations of a key search.

       key is a user's typed password.

       salt  is  a  two-character  string  chosen  from  the  set
       [a-zA-Z0-9./].   This  string is used to perturb the algo-
       rithm in one of 4096 different ways.