(Ruby) Sign JSON to Create CAdES P7S Bytes

Demonstrates how to sign JSON using a certificate + private key from a .p12/.pfx to create a CAdES P7S byte array.

Chilkat Ruby Downloads install from rubygems.org gem install chilkat or download... Ruby Library for Windows, MacOS, Linux, Alpine Linux

require 'chilkat'

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

crypt = Chilkat::CkCrypt2.new()

cert = Chilkat::CkCert.new()
success = cert.LoadPfxFile("qa_data/pfx/cert_test123.pfx","test123")
if (success != true)
    print cert.lastErrorText() + "\n";
    exit
end

# Tell the crypt component to use this cert.
success = crypt.SetSigningCert(cert)
if (success != true)
    print crypt.lastErrorText() + "\n";
    exit
end

# The CadesEnabled property applies to all methods that create PKCS7 signatures. 
# To create a CAdES-BES signature, set this property equal to true. 
crypt.put_CadesEnabled(true)

crypt.put_HashAlgorithm("sha256")

jsonSigningAttrs = Chilkat::CkJsonObject.new()
jsonSigningAttrs.UpdateInt("contentType",1)
jsonSigningAttrs.UpdateInt("signingTime",1)
jsonSigningAttrs.UpdateInt("messageDigest",1)
jsonSigningAttrs.UpdateInt("signingCertificateV2",1)
crypt.put_SigningAttributes(jsonSigningAttrs.emit())

# By default, all the certs in the chain of authentication are included in the signature.
# If desired, we can choose to only include the signing certificate:
crypt.put_IncludeCertChain(false)

# Create the CAdES-BES attached signature, which contains the original data.
crypt.put_Charset("utf-8")
cadesP7s = Chilkat::CkByteData.new()
success = crypt.OpaqueSignString("{ \"abc\": 123}",cadesP7s)
if (crypt.get_LastMethodSuccess() == false)
    print crypt.lastErrorText() + "\n";
    exit
end

# Verify the signature and extract the original JSON:
originalJson = crypt.opaqueVerifyString(cadesP7s)
if (crypt.get_LastMethodSuccess() == false)
    print crypt.lastErrorText() + "\n";
    exit
end

print "Original JSON: " + originalJson + "\n";

print "Success!" + "\n";