Storing Passwords Post: 302928974

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Top Forums Web Development Storing Passwords Post 302928974 by Corona688 on Tuesday 16th of December 2014 03:58:30 PM

12-16-2014

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Storing Passwords

Yes, it's that minefield again. I'm building an AJAX database interface which uses maria/mysql logins instead of keeping a bunch of its own private logins, to try and keep it simple.

The thorny bit is, of course, the passwords. Doing this requires it to remember passwords between sessions, not merely hashes but reversibly-encrypted passwords. I think I've built something like "ssh-agent" for databases, which keeps a key without leaving it wide-open to the world, but I want your feedback on it.

When the PHP session begins, the server generates a pair of 16-digit strings. One is kept in the server-side PHP session and never given to the user, the other is kept in a client-side cookie and never stored on the server. The concatenation of both strings is used to ENCODE() the password before storing it. It also records and validates your session ID and IP address, so someone can't steal the cookie and pretend to be you. Only the conjunction of a valid cookie with a valid login decrypts a valid password.

It sounds strong enough to me but encryption is not my forte. Are there any giant holes in this scheme?

Last edited by Corona688; 12-16-2014 at 05:04 PM..

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LEARN ABOUT FREEBSD

logins

LOGINS(1)						    BSD General Commands Manual 						 LOGINS(1)

NAME

     logins -- display account information

SYNOPSIS

     logins [-admopstux] [-g groups] [-l logins]

DESCRIPTION

     The logins utility displays information about user and system accounts.

     The following options are available:

     -a 	Display information about the password change and account expiration times for each account.

     -d 	Select accounts with duplicate UIDs.

     -g groups	Select accounts that are members of the specified groups.  If multiple group names are specified, they must be separated with com-
		mas.

     -l logins	Select accounts matching the specified login names.  If multiple names are specified, they must be separated with commas.

     -m 	Show information about secondary groups.

     -o 	Display the information for each account on a single line of colon-separated fields.

     -p 	Select accounts with no password.

     -s 	Select system accounts.  These are currently defined as accounts with UIDs below 1000, plus the ``nobody'' account (UID 65534).

     -t 	Sort selected accounts by name rather than by UID.

     -u 	Select user accounts.  These are currently defined as accounts with UIDs above 1000, except the ``nobody'' account (UID 65534).

     -x 	Display information about each account's home directory and shell.

     If multiple selection options are specified, all accounts matching any of the selection criteria will be displayed.

     If no selection options are specified, all accounts will be displayed.

SEE ALSO

     getgrent(3), getpwent(3), group(5), passwd(5), pw(8)

HISTORY

     The logins utility appeared in FreeBSD 4.10.

AUTHORS

     The logins utility was written by Dag-Erling Smorgrav <des@FreeBSD.org> based on similar utilities in other operating systems.

BSD
								   March 6, 2004							       BSD