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. Perl

use chilkat();

$success = 0;

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

$cert = chilkat::CkCert->new();
$cert->put_SmartCardPin("123456");
$success = $cert->LoadFromSmartcard("");
if ($success != 1) {
    print $cert->lastErrorText() . "\r\n";
    exit;
}

$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 = "Hello World!";

$bd = chilkat::CkBinData->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.
$http = chilkat::CkHttp->new();
# This can be a domain name, hostname, or IP address.
$http->put_ProxyDomain("172.16.16.56");
$http->put_ProxyPort(808);
$http->put_ProxyLogin("myProxyLogin");
$http->put_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 != 1) {
    print $crypt->lastErrorText() . "\r\n";
    exit;
}

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

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