You should be able to provide the password something like this: 
#!/usr/bin/perl

use strict;
use warnings;
use Net::SSH::Perl;

my $host = 'localhost';
my $user = 'user';
my @keyfile = ("/home/User/.ssh/id_rsa");

my $ssh = Net::SSH::Perl->new(
               $host,
               debug => 1,
               identity_files => \@keyfile
);

[download]
Double check @keyfile as it might be different.

In reply to Re: passphrase on a RSA key with net::ssh::perl by Khen1950fx
in thread passphrase on a RSA key with net::ssh::perl by manb

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