Crypt::RSA dies: Can't call method "encryptblock" on an undefined value

[rupesh]

OK, a wierd title, but I couldn't think of anything else.
Here's what I did after I installed Crypt::RSA.

Had a look at the author's tutorial at perl's own website.
Followed suit and prepared this code:

#!/usr/bin/perl
use strict;
use Crypt::RSA;

my $message="string";
my $rsa = new Crypt::RSA;
my ($public, $private) = $rsa->keygen( Size => 64 );
print "My Public key is: $public ", $public->serialize();
print "My Private key is: $private", $private->serialize();
my $c = $rsa->encrypt( Message => $message, Key => $public, ) or warn 
+"$!\n";
print "My cipher text is: $c\n";
my $nmessage = $rsa->decrypt( Ciphertext => $c, Key => $private, );
print "My plain text is: $nmessage\n";

Modified the RSA.pm to print certain messages in the enrypt subroutine:

....
......
....
sub encrypt {

    my ($self, %params)   = @_;
    my $plaintext         = $params{Message} || $params{Plaintext};
    my $key               = $params{Key};

        print "\n$plaintext\n$key\n";
    return $self->error ($key->errstr, \%params, $key, \$plaintext)
        unless $key->check();
        print "\nAfter self error\n";
    my $blocksize = blocksize ( $$self{es}->encryptblock (Key => $key)
+,
                                length($plaintext)
                              );
        print "\nAfter block size\n";
    return $self->error("Message too long.", \$key, \%params) if $bloc
+ksize <= 0;
        print "\nAfter self error\n";
    my $cyphertext;
....
....

Executed the code and got the following message:

My Public key is: Crypt::RSA::Key::Public=HASH(0x8132390) $VAR1 = bles
+s( {
                 'e' => 65537,
                 'n' => '10270622025769038677',
                 'Version' => '1.91'
               }, 'Crypt::RSA::Key::Public' );
My Private key is: Crypt::RSA::Key::Private=HASH(0x8132378)$VAR1 = ble
+ss( {
                 'Version' => '1.91',
                 'Checked' => 0,
                 'private' => {
                                '_phi' => '10270622019208864620',
                                '_n' => '10270622025769038677',
                                '_q' => '2581267387',
                                '_p' => '3978906671',
                                '_u' => '564982676',
                                '_dp' => '2208958913',
                                '_dq' => '2285751125',
                                '_d' => '4317024349041710693',
                                '_e' => '65537'
                              },
                 'Cipher' => 'Blowfish'
               }, 'Crypt::RSA::Key::Private' );

string
Crypt::RSA::Key::Public=HASH(0x8132390)

After self error
Can't call method "encryptblock" on an undefined value at /usr/lib/per
+l5/site_perl/5.8.0/Crypt/RSA.pm line 98.

Haven't been able to figure out why the "blocksize" method is failing.

Your thoughts?

Edited by Arunbear: Changed title from 'The "R", the "S" and the "A"...', as per Monastery guidelines

[Anonymous Monk]

If you read the error message, you see that the problem isn't with blocksize. The problem is with $$self{es}. You assume $$self{es} exists, and contains an object - but $$self{es} is undefined, it probably doesn't exist.

From the code given, I cannot deduce what $$self{es} is supposed to be. Or that it even is suposed to exist.

[Anonymous Monk]

Your lib path might be messed up somehow. When I got this error, I traced it down to the call to Class::Loader's _load method. For some reason in certain circumstances it quietly fails, leaving a null. Just an FYI, I explicitly set the object reference, and I'm getting provider errors in Crypt::Random. I think your only solution is to get it liking the classpath somehow.