05-22-2001
i don't beleive there is a utility to do what you ask. There is a program(s) named crack that will attempt to crack the passwd, but it is an exhaustive password cracker and takes time and may not crack the encryption. Processes already running will not be affected by a passwd change. in fact, informix can be a locked user if the database is started by the rc scripts.
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LEARN ABOUT DEBIAN
psk-crack
PSK-CRACK(1) General Commands Manual PSK-CRACK(1)
NAME
psk-crack - Crack IKE Aggressive Mode Pre-Shared Keys
SYNOPSIS
psk-crack [options] <psk-parameters-file>
<psk-parameters-file> is a file containing the parameters for the pre-shared key cracking process in the format generated by ike-scan with
the --pskcrack (-P) option. This file can contain one or more entries. For multiple entries, each one must be on a separate line.
The program can crack either MD5 or SHA1-based hashes. The type of hash is automatically determined from the length of the hash (16 bytes
for MD5 or 20 bytes for SHA1). Each entry in the <psk-parameters-file> is handled separately, so it is possible to crack a mixture of MD5
and SHA1 hashes.
psk-crack can also crack the proprietary hash format used by Nortel Contivity / VPN Router systems. When cracking Nortel format hashes,
you need to specify the username of the hash that you are cracking with the --norteluser (-u) option. When cracking Nortel format hashes,
you can only crack one hash at a time.
By default, psk-crack will perform dictionary cracking using the default dictionary. The dictionary can be changed with the --dictionary
(-d) option, or brute-force cracking can be selected with the --bruteforce (-B) option.
DESCRIPTION
psk-crack attempts to crack IKE Aggressive Mode pre-shared keys that have previously been gathered using ike-scan with the --pskcrack
option.
psk-crack can operate in two different modes:
1) Dictionary cracking mode: this is the default mode in which psk-crack tries each candidate word from the dictionary file in turn
until it finds a match, or all the words in the dictionary have been tried.
2) Brute-force cracking mode: in this mode, psk-crack tries all possible combinations of a specified character set up to a given
length.
OPTIONS
--help or -h
Display this usage message and exit.
--version or -V
Display program version and exit.
--verbose or -v
Display verbose progress messages.
--dictionary=<f> or -d <f>
Set dictionary file to <f>. The default is /usr/local/share/ike-scan/psk-crack-dictionary.
--norteluser=<u> or -u <u>
Specify the username for Nortel Contivity cracking. This option is required when cracking pre-shared keys on Nortel Contivity / VPN
Router systems. These systems use a proprietary method to calculate the hash that includes the username. This option is only
needed when cracking Nortel format hashes, and should not be used for standard format hashes.
--bruteforce=<n> or -B <n>
Select bruteforce cracking up to <n> characters.
--charset=<s> or -c <s>
Set bruteforce character set to <s> Default is "0123456789abcdefghijklmnopqrstuvwxyz"
AUTHOR
Roy Hills <Roy.Hills@nta-monitor.com>
February 14, 2005 PSK-CRACK(1)