Sign a JWS with a Certificate

See more JSON Web Signatures (JWS) Examples

Demonstrates Jws.SetSigningCert, which sets the certificate whose associated private key is used to create a signature.

The file path is relative to the application's current working directory. An absolute path may also be used. Supply the path appropriate to your own environment.

require 'chilkat'

success = false

jws = Chilkat::CkJws.new()

#  Protected header specifying RSASSA-PKCS1-v1_5 with SHA-256 (RS256).
header = Chilkat::CkJsonObject.new()
header.UpdateString("alg","RS256")
success = jws.SetProtectedHeader(0,header)
if (success == false)
    print jws.lastErrorText() + "\n";
    exit
end

bIncludeBom = false
success = jws.SetPayload("This is the content to sign.","utf-8",bIncludeBom)
if (success == false)
    print jws.lastErrorText() + "\n";
    exit
end

#  The file path is relative to the application's current working directory.  An absolute path
#  may also be used.  Supply the path appropriate to your own environment.
#  The PFX password should come from a secure source rather than being hard-coded.
pfxPassword = "myPfxPassword"

#  Load a certificate that has an associated private key, then set it as the signing certificate for
#  signature 0.  The certificate's private key is used to create the signature.
cert = Chilkat::CkCert.new()
success = cert.LoadPfxFile("qa_data/signer.pfx",pfxPassword)
if (success == false)
    print cert.lastErrorText() + "\n";
    exit
end

success = jws.SetSigningCert(0,cert)
if (success == false)
    print jws.lastErrorText() + "\n";
    exit
end

jwsCompact = jws.createJws()
if (jws.get_LastMethodSuccess() == false)
    print jws.lastErrorText() + "\n";
    exit
end

print jwsCompact + "\n";