Ruby

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.

Ruby

require 'chilkat'

success = false

# 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 != true)
    print cert.lastErrorText() + "\n";
    exit
end

# 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",true)
attrs.UpdateBool("signingTime",true)
attrs.UpdateBool("messageDigest",true)
attrs.UpdateBool("signingCertificateV2",true)

# 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",true)
attrs.UpdateString("timestampToken.tsaUrl","https://freetsa.org/tsr")
attrs.UpdateBool("timestampToken.addNonce",false)
attrs.UpdateBool("timestampToken.requestTsaCert",true)
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 != true)
    print crypt.lastErrorText() + "\n";
    exit
end

# Get the signature in base64 format:
print bd.getEncoded("base64_mime") + "\n";

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

print "Success." + "\n";