Perl

RSA Sign using a Private Key on a USB Token or Smartcard

See more Apple Keychain Examples

Create an RSA signature using a private key stored on a USB token or smartcard. Chilkat2 Perl

use strict;
use warnings;
use Chilkat2;

# Assuming the smartcard/USB token is installed with the correct drivers from the manufacturer,
# this code can work on multiple platforms including Windows, MacOS, Linux, and iOS.

# Chilkat automatically detects and determines the way in which the HSM is used,
# which can be by PKCS11, Apple Keychain, Microsoft CNG / Crypto API, or ScMinidriver.

my $cert = Chilkat2::Cert->new;

# Set the token/smartcard PIN prior to loading.
$cert->SmartCardPin('123456');

# Specify the certificate by its common name.
my $success = $cert->LoadFromSmartcard('cn=chilkat-rsa-2048');
if (!$success) {
    print $cert->LastErrorText, "\n";
    exit;
}

print 'Signing with cert: ', $cert->SubjectCN, "\n";

# Create data to be hashed and signed.
my $bd = Chilkat2::BinData->new;
for my $i (0 .. 100) {
    $bd->AppendEncoded('000102030405060708090A0B0C0D0E0F', 'hex');
}

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

# Use the certificate's private key for signing.
$success = $rsa->SetX509Cert($cert, 1);
if (!$success) {
    print $rsa->LastErrorText, "\n";
    exit;
}

# Sign the SHA-256 hash of the contents of bd.
my $bdSig = Chilkat2::BinData->new;
$success = $rsa->SignBd($bd, 'sha256', $bdSig);
if (!$success) {
    print $rsa->LastErrorText, "\n";
    exit;
}

# The RSA signature is equal in length to the size of the RSA key.
print 'Output signature size in bits = ', ($bdSig->NumBytes * 8), "\n";

# We can save the signature for later verification..
$bdSig->WriteFile('rsaSignatures/test1.sig');

# See the example to verify the RSA signature:
# Verfies an RSA Signature