public void sign(X509Certificate[] sigCertChain, byte[] certSignature) {
		this.certChain = sigCertChain;
		this.signature = (certSignature == null ? null : certSignature.clone());
	}
Set token signature data.  Method must be invoked by 
callback handler.
@param sigCertChain certificate chain used to sign token.
@param certSignature token signature
Ghidra/Framework/FileSystem/src/main/java/ghidra/framework/remote/SignatureCallback.java