Perl Requires Chilkat v11.0.0+

Create PKCS1 RSA Signature with PEM Private Key

See more RSA Examples

Demonstrates how to load a private key from a PEM file and create a PKCS1 RSA digital signature. Chilkat2 Perl

use strict;
use warnings;
use Chilkat2;

# This example assumes the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

my $pkey = Chilkat2::PrivateKey->new;

# Load the private key from an RSA PEM file:
my $success = $pkey->LoadPemFile('pvkey2_rsa.pem');
if (!$success) {
    print $pkey->LastErrorText, "\n";
    exit;
}

my $rsa = Chilkat2::Rsa->new;

# Import the private key into the RSA object:
$success = $rsa->UsePrivateKey($pkey);
if (!$success) {
    print $rsa->LastErrorText, "\n";
    exit;
}

# Get the signature as hex.
$rsa->EncodingMode('hex');

my $strData = 'This is the string to be signed.';

# Sign the string using the sha-1 hash algorithm.
# Other valid choices are "md2", "md5", "sha256",
# "sha384", and "sha512".
my $hexSig = $rsa->SignStringENC($strData, 'sha-1');

print $hexSig, "\n";

print "Success!\n";