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encode_keychange(1) [osx man page]

encode_keychange(1)						     Net-SNMP						       encode_keychange(1)

NAME

       encode_keychange - produce the KeyChange string for SNMPv3

SYNOPSIS

       encode_keychange -t md5|sha1 [OPTIONS]

DESCRIPTION

       encode_keychange  produces  a KeyChange string using the old and new passphrases as described in Section 5 of RFC 2274 "User-based Security
       Model (USM) for version 3 of the Simple Network Management Protocol (SNMPv3)". -t option is mandatory and specifies the hash transform type
       to use.

       The transform is used to convert passphrase to master key for a given user (Ku), convert master key to the localized key (Kul), and to hash
       the old Kul with the random bits.

       Passphrases are obtained by examining a number of sources until success (in order listed):

	      command line options (see -N and -O options below);

	      the file $HOME/.snmp/passphrase.ek which should only contain two lines with old and new passphrase;

	      standard input -or-  user input from the terminal.

OPTIONS

       -E [0x]<engineID> EngineID used for Kul generation.
	      <engineID> is intepreted as a hex string when preceeded by 0x, otherwise it is treated as a text string. If no <engineID> is  speci-
	      fied, it is constructed from the first IP address for the local host.

       -f     Force passphrases to be read from standard input.

       -h     Display the help message.

       -N "<new_passphrase>"
	      Passphrase used to generate the new Ku.

       -O "<old_passphrase>"
	      Passphrase used to generate the old Ku.

       -P     Turn off the prompt for passphrases when getting data from standard input.

       -v     Be verbose.

       -V     Echo passphrases to terminal.

SEE ALSO

       The localized key method is defined in RFC 2274, Sections 2.6 and A.2, and originally documented in

	      U.  Blumenthal, N. C. Hien, B. Wijnen, "Key Derivation for Network Management Applications", IEEE Network Magazine, April/May issue,
	      1997.

V5.6								    16 Nov 2006 					       encode_keychange(1)

Check Out this Related Man Page

Authen::Passphrase::Clear(3pm)				User Contributed Perl Documentation			    Authen::Passphrase::Clear(3pm)

NAME

       Authen::Passphrase::Clear - cleartext passphrases

SYNOPSIS

	       use Authen::Passphrase::Clear;

	       $ppr = Authen::Passphrase::Clear->new("passphrase");

	       if($ppr->match($passphrase)) { ...

	       $passphrase = $ppr->passphrase;

	       $userPassword = $ppr->as_rfc2307;

DESCRIPTION

       An object of this class is a passphrase recogniser that accepts some particular passphrase which it knows.  This is a subclass of
       Authen::Passphrase, and this document assumes that the reader is familiar with the documentation for that class.

       Warning: Storing a passphrase in cleartext, as this class does, is a very bad idea.  It means that anyone who sees the passphrase file
       immediately knows all the passphrases.  Do not use this unless you really know what you're doing.

CONSTRUCTORS

       Authen::Passphrase::Clear->new(PASSPHRASE)
	   Returns a passphrase recogniser object that stores the specified passphrase in cleartext and accepts only that passphrase.

       Authen::Passphrase::Clear->from_rfc2307(USERPASSWORD)
	   Generates a cleartext passphrase recogniser from the supplied RFC2307 encoding.  The string must consist of "{CLEARTEXT}" (case
	   insensitive) followed by the passphrase.

METHODS

       $ppr->match(PASSPHRASE)
       $ppr->passphrase
       $ppr->as_rfc2307
	   These methods are part of the standard Authen::Passphrase interface.  The "passphrase" method trivially works.

SEE ALSO

       Authen::Passphrase

AUTHOR

       Andrew Main (Zefram) <zefram@fysh.org>

COPYRIGHT

       Copyright (C) 2006, 2007, 2009, 2010, 2012 Andrew Main (Zefram) <zefram@fysh.org>

LICENSE

       This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

perl v5.14.2							    2012-02-07					    Authen::Passphrase::Clear(3pm)
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