Net::SSH::Perl::Auth::UseriContributed Perl Net::SSH::Perl::Auth::PublicKey(3)NAMENet::SSH::Perl::Auth::PublicKey - Perform publickey authentication
SYNOPSIS
use Net::SSH::Perl::Auth;
my $auth = Net::SSH::Perl::Auth->new('PublicKey', $ssh);
$auth->authenticate;
DESCRIPTIONNet::SSH::Perl::Auth::PublicKey performs publickey authentication with
a remote sshd server. When you create a new PublicKey auth object, you
give it an $ssh object, which should contain an open connection to an
ssh daemon, as well as any data that the authentication module needs to
proceed. In this case, for example, the $ssh object might contain a
list of identity files (see the docs for Net::SSH::Perl).
The authenticate method first tries to establish a connection to an
authentication agent. If the attempt is successful, authenticate loops
through each of the identities returned from the agent and tries each
identity against the sshd, entering into a dialog with the server: the
client sends the public portion of the key to determine whether the
server will accept it; if the server accepts the key as authorization,
the client then asks the agent to sign a piece of data using the key,
which the client sends to the server. If the server accepts an
identity/key, authentication is successful.
If the agent connection attempt fails, or if none of the identities
returned from the agent allow for successful authentication,
authenticate then tries to load each of the user's private key identity
files (specified in the Net::SSH::Perl constructor, or defaulted to
$ENV{HOME}/.ssh/id_dsa). For each identity, authenticate enters into a
dialog with the server. The client sends a message to the server,
giving its public key, plus a signature of the key and the other data
in the message (session ID, etc.). The signature is generated using
the corresponding private key. The sshd receives the message and
verifies the signature using the client's public key. If the
verification is successful, the authentication succeeds.
When loading each of the private key files, the client first tries to
load the key using an empty passphrase. If this fails, the client
either prompts the user for a passphrase (if the session is
interactive) or skips the key altogether.
AUTHOR & COPYRIGHTS
Please see the Net::SSH::Perl manpage for author, copyright, and
license information.
perl v5.14.12009-01-26Net::SSH::Perl::Auth::PublicKey(3)
