(Perl) Create PKCS1 RSA Signature with PEM Private Key

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

Chilkat Perl Downloads Perl Module for Windows, MacOS, Linux, Alpine Linux, Solaris

use chilkat();

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

$pkey = chilkat::CkPrivateKey->new();

# Load the private key from an RSA PEM file:
$success = $pkey->LoadPemFile("pvkey2_rsa.pem");

# Get the private key in XML format:
$pkeyXml = $pkey->getXml();

$rsa = chilkat::CkRsa->new();

# Import the private key into the RSA object:
$success = $rsa->ImportPrivateKey($pkeyXml);
if ($success != 1) {
    print $rsa->lastErrorText() . "\r\n";
    exit;
}

# Get the signature as hex.
$rsa->put_EncodingMode("hex");

$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".
$hexSig = $rsa->signStringENC($strData,"sha-1");

print $hexSig . "\r\n";

print "Success!" . "\r\n";