/* Icinga 2 | (c) 2012 Icinga GmbH | GPLv2+ */

#include "cli/casigncommand.hpp"
#include "base/logger.hpp"
#include "base/application.hpp"
#include "base/tlsutility.hpp"
#include "remote/apilistener.hpp"

using namespace icinga;

REGISTER_CLICOMMAND("ca/sign", CASignCommand);

/**
 * Provide a long CLI description sentence.
 *
 * @return text
 */
String CASignCommand::GetDescription() const
{
	return "Signs an outstanding certificate request.";
}

/**
 * Provide a short CLI description.
 *
 * @return text
 */
String CASignCommand::GetShortDescription() const
{
	return "signs an outstanding certificate request";
}

/**
 * Define minimum arguments without key parameter.
 *
 * @return number of arguments
 */
int CASignCommand::GetMinArguments() const
{
	return 1;
}

/**
 * Impersonate as Icinga user.
 *
 * @return impersonate level
 */
ImpersonationLevel CASignCommand::GetImpersonationLevel() const
{
	return ImpersonateIcinga;
}

/**
 * The entry point for the "ca sign" CLI command.
 *
 * @return An exit status.
 */
int CASignCommand::Run(const boost::program_options::variables_map& vm, const std::vector<std::string>& ap) const
{
	String requestFile = ApiListener::GetCertificateRequestsDir() + "/" + ap[0] + ".json";

	if (!Utility::PathExists(requestFile)) {
		Log(LogCritical, "cli")
			<< "No request exists for fingerprint '" << ap[0] << "'.";
		return 1;
	}

	Dictionary::Ptr request = Utility::LoadJsonFile(requestFile);

	if (!request)
		return 1;

	String certRequestText = request->Get("cert_request");

	std::shared_ptr<X509> certRequest = StringToCertificate(certRequestText);

	if (!certRequest) {
		Log(LogCritical, "cli", "Certificate request is invalid. Could not parse X.509 certificate for the 'cert_request' attribute.");
		return 1;
	}

	std::shared_ptr<X509> certResponse = CreateCertIcingaCA(certRequest);

	BIO *out = BIO_new(BIO_s_mem());
	X509_NAME_print_ex(out, X509_get_subject_name(certRequest.get()), 0, XN_FLAG_ONELINE & ~ASN1_STRFLGS_ESC_MSB);

	char *data;
	long length;
	length = BIO_get_mem_data(out, &data);

	String subject = String(data, data + length);
	BIO_free(out);

	if (!certResponse) {
		Log(LogCritical, "cli")
			<< "Could not sign certificate for '" << subject << "'.";
		return 1;
	}

	request->Set("cert_response", CertificateToString(certResponse));

	Utility::SaveJsonFile(requestFile, 0600, request);

	Log(LogInformation, "cli")
		<< "Signed certificate for '" << subject << "'.";

	return 0;
}