[Semibug] Generate random passwords?

[Jonathan Drews]

On Fri, Jul 16, 2021 at 02:57:29PM -0400, Mike Wayne wrote:
> On Thu, Jul 15, 2021 at 01:40:15PM -0600, Jonathan Drews wrote:
> > What is a good way to generate random passwords on OpenBSD? 
> 
> I rather despise having to install a package (or, much worse,
> multiple packages) for something so simple.
> 
> An ex employee wrote this back in 1995:
> 

Thanks Mike:

 Works like a charm!

cleetus:6$ ./a.out                                                                              
c1kg&4oprueTLQatY9vt5sG66tcmcG3bFj0xwJlM
cleetus:7$ ./a.out          
X6CjMwTtiivBL6IJ4C9PzVz6N7qCK=E0uALxFEBd

> 
> /*
>  * randpass.c -- generate really random passwords.
>  *
>  * Written by Carl S. Gutekunst.  Released into the Public Domain 95/09/28
>  */
> #include <stdio.h>
> #include <stdlib.h>
> 
> #define PASSWD_LEN 40                   /* Number of chars in a password */
> 
> char passchars[] =
>         "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxuz";
> char symbchars[] =
>         "!$%&()*+,-./:;<=>?[]^{|}";
> 
> main()
> {
>     int   passIndex;
>     int   symbIndex;
>     char  passwd[PASSWD_LEN+1];
> 
>     srand((int) time(0));                       /* Set the seed */
> 
>     /*
>      * One position will have a symbol; the rest are alphanumeric only.  This
>      * corresponds to the mandates of many UNIX password checkers.
>      */
>     symbIndex = rand() % PASSWD_LEN;
> 
>     /*
>      * Fill the password string with random characters.
>      */
>     for (passIndex = 0; passIndex < PASSWD_LEN; ++passIndex) {
>         if (symbIndex == passIndex) {
>             passwd[passIndex] = symbchars[rand() % (sizeof(symbchars) - 1)];
>         }
>         else {
>             passwd[passIndex] = passchars[rand() % (sizeof(passchars) - 1)];
>         }
>     }
> 
>     /*
>      * Write new passwd to stdout.
>      */
>     passwd[PASSWD_LEN] = '\0';
>     puts(passwd);
>     return 0;
> }
> 
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