Net::SSH::Perl::Kex(3pm) User Contributed Perl Documentation Net::SSH::Perl::Kex(3pm)
NAME
Net::SSH::Perl::Kex - SSH2 Key Exchange
SYNOPSIS
use Net::SSH::Perl::Kex;
my $kex = Net::SSH::Perl::Kex->new($ssh);
$kex->exchange;
DESCRIPTION
Net::SSH::Perl::Kex implements base functionality for SSH2 key exchange. The basic idea is
this: Kex itself initializes the client algorithm proposal, sends it to the server, then
waits for the server's proposal. From these proposals Kex chooses the algorithms that will
be used in the communications between client and server (eg. encryption algorithm, MAC
algorithm, etc.). Different algorithms can be used in each direction; for example, client
to server communications could be encrypted using 3DES, and server to client could be
encrypted using RC4.
The algorithm negotiation phase, as described above, includes negotiation for the key-
exchange algorithm to be used. Currently, the only supported algorithm is Diffie-Hellman
Group 1 key exchange, implemented in Net::SSH::Perl::Kex::DH1. After algorithm
negotiation, the Kex object is reblessed into the key exchange class (eg.
'Net::SSH::Perl::Kex::DH1'), and then the subclass's exchange method is called to perform
the key exchange.
Once control returns to Kex::exchange, the client waits for the SSH_MSG_NEWKEYS message;
once received, the client turns on its incoming encryption/MAC/compression algorithms,
then sends an SSH_MSG_NEWKEYS message to the server. Finally, it turns on its outgoing
encryption/MAC/compression algorithms.
AUTHOR & COPYRIGHTS
Please see the Net::SSH::Perl manpage for author, copyright, and license information.
perl v5.10.0 2009-02-01 Net::SSH::Perl::Kex(3pm)
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Under GNU General Public License
2012-05-24 21:27 @38.107.179.240 Crawled by CCBot/1.0 (+http://www.commoncrawl.org/bot.html)