1Net::SSH::Perl::Auth::RUSsAe(r3)Contributed Perl DocumenNteatt:i:oSnSH::Perl::Auth::RSA(3)
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6 Net::SSH::Perl::Auth::RSA - Perform RSA authentication
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9 use Net::SSH::Perl::Auth;
10 my $auth = Net::SSH::Perl::Auth->new('RSA', $ssh);
11 print "Valid auth" if $auth->authenticate;
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14 Net::SSH::Perl::Auth::RSA performs RSA authentication with a remote
15 sshd server. When you create a new RSA auth object, you give it an $ssh
16 object, which should contain an open connection to an ssh daemon, as
17 well as any data that the authentication module needs to proceed. In
18 this case, for example, the $ssh object might contain a list of RSA
19 identity files (see the docs for Net::SSH::Perl).
20 The authenticate method first tries to establish a connection to an
22 authentication agent. If the connection attempt is successful, the
23 client loops through the identities returned from the agent, and tries
24 each identity/key against the server. The client enters into a dialog
25 with the server. The client sends the public portion of the key
26 returned from the agent. The server responds, telling the client
27 whether the key is authorized for authentication; if the key is
28 authorized, the server sends an RSA challenge encrypted with the user's
29 public key. The client then asks the agent to decrypt the challenge
30 using the private portion of the key, and sends back its response. If
31 the response is correct, the client is authenticated successfully.
32 If the client cannot connect to the authentication agent, or if none of
34 the identities returned from the agent successfully authenticate the
35 user, authenticate then loops through each of the files listed as
36 identity files (see the Net::SSH::Perl constructor). If no identity
37 files are explicitly listed, $ENV{HOME}/.ssh/identity is used as a
38 default. For each identity, the client enters into a dialog with the
39 sshd server.
40 The client sends the public key to the server, then waits for a
42 challenge. Once this challenge is received, the client must decrypt the
43 challenge using the private key (loaded from the identity file). When
44 loading the private key, you may need to enter a passphrase to decrypt
45 the private key itself; first authenticate tries to decrypt the key
46 using an empty passphrase (which requires no user intervention). If
47 this fails, the client checks to see if it's running in an interactive
48 session. If so, it queries the user for a passphrase, which is then
49 used to decrypt the private key. If the session is non-interactive and
50 the private key cannot be loaded, the client simply sends a dummy
51 response to the RSA challenge, to comply with the SSH protocol.
52 Otherwise, if the private key has been loaded, and the challenge
54 decrypted, the client sends its response to the server, then waits for
55 success or failure.
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58 Please see the Net::SSH::Perl manpage for author, copyright, and
59 license information.
60perl v5.34.0 2022-03-04 Net::SSH::Perl::Auth::RSA(3)