Perl

Sign String to create a CAdES-T Signature

See more CAdES Examples

This example will sign a string to create a CAdEST-T signature.

Note: This example requires Chilkat v9.5.0.78 or greater.

Perl

use chilkat();

$success = 0;

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

$crypt = chilkat::CkCrypt2->new();

# This example will use the certificate + private key currently inserted into a smartcard reader.
$cert = chilkat::CkCert->new();

# If we wish to provide the smartcard PIN (otherwise the user will be prompted by the operating system).
$cert->put_SmartCardPin("000000");
$success = $cert->LoadFromSmartcard("");
if ($success != 1) {
    print $cert->lastErrorText() . "\r\n";
    exit;
}

# Note: It is also possible to use certs from .pfx/.p12, .pem, or other sources such as 
# pre-installed Windows certificates.

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

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

# Create JSON that tells Chilkat what signing attributes to include:
$attrs = chilkat::CkJsonObject->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");

$crypt->put_SigningAttributes($attrs->emit());

$strToSign = "THIS IS MY ID";

$bd = chilkat::CkBinData->new();
$bd->AppendString($strToSign,"utf-8");

# 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 != 1) {
    print $crypt->lastErrorText() . "\r\n";
    exit;
}

# Get the signature in base64 format:
print $bd->getEncoded("base64_mime") . "\r\n";

# Or save the signature to a file.
$bd->WriteFile("qa_output/cades-t_sample.p7m");

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