Perl Requires Chilkat v11.0.0+

RSA Signature using Private Key from .snk File

See more RSA Examples

A .snk file (Strong Name Key file) is a file format used in the .NET ecosystem to store an RSA public/private key pair. This key pair is typically used for strong-naming assemblies, which is a process of signing .NET assemblies to ensure their integrity and to uniquely identify them.

This example loads a private key from a .snk file and creates an RSA signature.

Chilkat2 Perl

use strict;
use warnings;
use Chilkat2;

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

# Load the .snk and return the private key as XML.
my $xmlStr = $rsa->SnkToXml('./test.snk');
if (!$rsa->LastMethodSuccess) {
    print $rsa->LastErrorText, "\n";
    exit;
}

my $privKey = Chilkat2::PrivateKey->new;
my $success = $privKey->LoadXml($xmlStr);
if (!$success) {
    print $privKey->LastErrorText, "\n";
    exit;
}

$success = $rsa->UsePrivateKey($privKey);
if (!$success) {
    print $rsa->LastErrorText, "\n";
    exit;
}

# Sign the SHA-256 hash of the utf-8 byte representation of the contents of sb
# Return the signature in base64 format.
$rsa->EncodingMode('base64');
$rsa->Charset('utf-8');
my $sigBase64 = $rsa->SignStringENC('This is the text to be hashed and signed.', 'sha256');
if (!$rsa->LastMethodSuccess) {
    print $rsa->LastErrorText, "\n";
    exit;
}

print 'RSA signature as base64: ', $sigBase64, "\n";