Perl

Sign String to create a CAdES-T Signature, using HTTP Proxy to Access Timestamp Server

This example will sign a string to create a CAdEST-T signature. It will use an HTTP proxy to access the timestamp server. Chilkat2 Perl

use strict;
use warnings;
use Chilkat2;

my $crypt = Chilkat2::Crypt2->new;

my $cert = Chilkat2::Cert->new;
$cert->SmartCardPin('123456');
my $success = $cert->LoadFromSmartcard('');
if (!$success) {
    print $cert->LastErrorText, "\n";
    exit;
}

$success = $crypt->SetSigningCert($cert);

# Use SHA-256 rather than the default of SHA-1
$crypt->HashAlgorithm('sha256');

# Create JSON that tells Chilkat what signing attributes to include:
my $attrs = Chilkat2::JsonObject->new;
$attrs->UpdateBool('contentType', 1);
$attrs->UpdateBool('signingTime', 1);
$attrs->UpdateBool('messageDigest', 1);
$attrs->UpdateBool('signingCertificateV2', 1);

# A CAdES-T signature is one that includes a timestampToken created by an online TSA (time stamping authority).
# We must include the TSA's URL, as well as a few options to indicate what is desired.
# Except for the TSA URL, the options shown here are typically what you would need.
$attrs->UpdateBool('timestampToken.enabled', 1);
$attrs->UpdateString('timestampToken.tsaUrl', 'https://freetsa.org/tsr');
$attrs->UpdateBool('timestampToken.addNonce', 0);
$attrs->UpdateBool('timestampToken.requestTsaCert', 1);
$attrs->UpdateString('timestampToken.hashAlg', 'sha256');

$crypt->SigningAttributes($attrs->Emit());

my $strToSign = 'Hello World!';

my $bd = Chilkat2::BinData->new;
$bd->AppendString($strToSign, 'utf-8');

# -------------------------------------------------------------------------
# The purpose of this example is to show how an HTTP object with custom
# settings can be used to access the Internet when signing.
# Access to the Internet is needed to communicate with the timestamp server.
my $http = Chilkat2::Http->new;
# This can be a domain name, hostname, or IP address.
$http->ProxyDomain('172.16.16.56');
$http->ProxyPort(808);
$http->ProxyLogin('myProxyLogin');
$http->ProxyPassword('myProxyPassword');
$crypt->SetTsaHttpObj($http);
# -------------------------------------------------------------------------

# This creates the CAdES-T signature.  During the signature creation, it
# communicates with the TSA to get a timestampToken.
# The contents of bd are signed and replaced with the CAdES-T signature (which embeds the original content).
$success = $crypt->OpaqueSignBd($bd);
if (!$success) {
    print $crypt->LastErrorText, "\n";
    exit;
}

# Get the signature in base64 format:
print $bd->GetEncoded('base64_mime'), "\n";

print "Success.\n";