I have been working for some time on some encryption stuff, and have come across a road block. I follow the instructions in Crypt::RSA's pod docs, but I keep getting the same error - cannot call method n on an undefined value.

Here is the decode sub from RSA.pm:
sub decrypt { 
    my ($self, %params) = @_;
    my $key = $params{Key}; 
    my $cyphertext = $params{Cyphertext};
    $cyphertext = unpack "u*", $cyphertext if $params{Armour};
    my $plaintext;
    my $blocksize = ((bitsize ($key->n)) / 8); 
    my @segments = steak ($cyphertext, $blocksize);
    for (@segments) {
        $plaintext .= $self->{eme}->decrypt (Cyphertext=> $_, Key => $
+key)
            || return $self->error ($self->{eme}->errstr, \$key, \%par
+ams);
    }
    return $plaintext;
}

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The killer is that bitsize ($key->n). I have turned on Armour (Armour => 1) and base64 encoded the key I am sending, but still the system is unable to call method n on they $key value.
Here is the way I am calling, in case that helps:
# $decoded is the base64 decoded cookie
my @fields = get_fields($decoded);
my $public_key = get_pubkey($fields[2]); # Verified to work
my $rsa = new Crypt::RSA;
my $checksum = $rsa->decrypt(
                             Cyphertext => $encrypted,
                             Key => $public_key,
                             Armour => 1,) || die $rsa->errstr();

[download]
No matter what I feed in as $public_key, in whatever form, RSA.pm always says it can't call method n on it.

Any help would be appreciated.

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In reply to Crypt fun by tame1

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