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/* Icinga 2 | (c) 2020 Icinga GmbH | GPLv2+ */
#include "cli/pkiverifycommand.hpp"
#include "icinga/service.hpp"
#include "remote/pkiutility.hpp"
#include "base/tlsutility.hpp"
#include "base/logger.hpp"
#include <iostream>
using namespace icinga;
namespace po = boost::program_options;
REGISTER_CLICOMMAND("pki/verify", PKIVerifyCommand);
String PKIVerifyCommand::GetDescription() const
{
return "Verify TLS certificates: CN, signed by CA, is CA; Print certificate";
}
String PKIVerifyCommand::GetShortDescription() const
{
return "verify TLS certificates: CN, signed by CA, is CA; Print certificate";
}
void PKIVerifyCommand::InitParameters(boost::program_options::options_description& visibleDesc,
boost::program_options::options_description& hiddenDesc) const
{
visibleDesc.add_options()
("cn", po::value<std::string>(), "Common Name (optional). Use with '--cert' to check the CN in the certificate.")
("cert", po::value<std::string>(), "Certificate file path (optional). Standalone: print certificate. With '--cacert': Verify against CA.")
("cacert", po::value<std::string>(), "CA certificate file path (optional). If passed standalone, verifies whether this is a CA certificate")
("crl", po::value<std::string>(), "CRL file path (optional). Check the certificate against this revocation list when verifying against CA.");
}
std::vector<String> PKIVerifyCommand::GetArgumentSuggestions(const String& argument, const String& word) const
{
if (argument == "cert" || argument == "cacert" || argument == "crl")
return GetBashCompletionSuggestions("file", word);
else
return CLICommand::GetArgumentSuggestions(argument, word);
}
/**
* The entry point for the "pki verify" CLI command.
*
* @returns An exit status.
*/
int PKIVerifyCommand::Run(const boost::program_options::variables_map& vm, const std::vector<std::string>& ap) const
{
String cn, certFile, caCertFile, crlFile;
if (vm.count("cn"))
cn = vm["cn"].as<std::string>();
if (vm.count("cert"))
certFile = vm["cert"].as<std::string>();
if (vm.count("cacert"))
caCertFile = vm["cacert"].as<std::string>();
if (vm.count("crl"))
crlFile = vm["crl"].as<std::string>();
/* Verify CN in certificate. */
if (!cn.IsEmpty() && !certFile.IsEmpty()) {
std::shared_ptr<X509> cert;
try {
cert = GetX509Certificate(certFile);
} catch (const std::exception& ex) {
Log(LogCritical, "cli")
<< "Cannot read certificate file '" << certFile << "'. Please ensure that it exists and is readable.";
return ServiceCritical;
}
Log(LogInformation, "cli")
<< "Verifying common name (CN) '" << cn << " in certificate '" << certFile << "'.";
std::cout << PkiUtility::GetCertificateInformation(cert) << "\n";
String certCN = GetCertificateCN(cert);
if (cn == certCN) {
Log(LogInformation, "cli")
<< "OK: CN '" << cn << "' matches certificate CN '" << certCN << "'.";
return ServiceOK;
} else {
Log(LogCritical, "cli")
<< "CRITICAL: CN '" << cn << "' does NOT match certificate CN '" << certCN << "'.";
return ServiceCritical;
}
}
/* Verify certificate. */
if (!certFile.IsEmpty() && !caCertFile.IsEmpty()) {
std::shared_ptr<X509> cert;
try {
cert = GetX509Certificate(certFile);
} catch (const std::exception& ex) {
Log(LogCritical, "cli")
<< "Cannot read certificate file '" << certFile << "'. Please ensure that it exists and is readable.";
return ServiceCritical;
}
std::shared_ptr<X509> cacert;
try {
cacert = GetX509Certificate(caCertFile);
} catch (const std::exception& ex) {
Log(LogCritical, "cli")
<< "Cannot read CA certificate file '" << caCertFile << "'. Please ensure that it exists and is readable.";
return ServiceCritical;
}
Log(LogInformation, "cli")
<< "Verifying certificate '" << certFile << "'";
std::cout << PkiUtility::GetCertificateInformation(cert) << "\n";
Log(LogInformation, "cli")
<< " with CA certificate '" << caCertFile << "'.";
std::cout << PkiUtility::GetCertificateInformation(cacert) << "\n";
String certCN = GetCertificateCN(cert);
bool signedByCA;
try {
signedByCA = VerifyCertificate(cacert, cert, crlFile);
} catch (const std::exception& ex) {
Log logmsg (LogCritical, "cli");
logmsg << "CRITICAL: Certificate with CN '" << certCN << "' is NOT signed by CA: ";
if (const unsigned long *openssl_code = boost::get_error_info<errinfo_openssl_error>(ex)) {
logmsg << X509_verify_cert_error_string(*openssl_code) << " (code " << *openssl_code << ")";
} else {
logmsg << DiagnosticInformation(ex, false);
}
return ServiceCritical;
}
if (signedByCA) {
Log(LogInformation, "cli")
<< "OK: Certificate with CN '" << certCN << "' is signed by CA.";
return ServiceOK;
} else {
Log(LogCritical, "cli")
<< "CRITICAL: Certificate with CN '" << certCN << "' is NOT signed by CA.";
return ServiceCritical;
}
}
/* Standalone CA checks. */
if (certFile.IsEmpty() && !caCertFile.IsEmpty()) {
std::shared_ptr<X509> cacert;
try {
cacert = GetX509Certificate(caCertFile);
} catch (const std::exception& ex) {
Log(LogCritical, "cli")
<< "Cannot read CA certificate file '" << caCertFile << "'. Please ensure that it exists and is readable.";
return ServiceCritical;
}
Log(LogInformation, "cli")
<< "Checking whether certificate '" << caCertFile << "' is a valid CA certificate.";
std::cout << PkiUtility::GetCertificateInformation(cacert) << "\n";
if (IsCa(cacert)) {
Log(LogInformation, "cli")
<< "OK: CA certificate file '" << caCertFile << "' was verified successfully.\n";
return ServiceOK;
} else {
Log(LogCritical, "cli")
<< "CRITICAL: The file '" << caCertFile << "' does not seem to be a CA certificate file.\n";
return ServiceCritical;
}
}
/* Print certificate */
if (!certFile.IsEmpty()) {
std::shared_ptr<X509> cert;
try {
cert = GetX509Certificate(certFile);
} catch (const std::exception& ex) {
Log(LogCritical, "cli")
<< "Cannot read certificate file '" << certFile << "'. Please ensure that it exists and is readable.";
return ServiceCritical;
}
Log(LogInformation, "cli")
<< "Printing certificate '" << certFile << "'";
std::cout << PkiUtility::GetCertificateInformation(cert) << "\n";
return ServiceOK;
}
/* Error handling. */
if (!cn.IsEmpty() && certFile.IsEmpty()) {
Log(LogCritical, "cli")
<< "The '--cn' parameter requires the '--cert' parameter.";
return ServiceCritical;
}
if (cn.IsEmpty() && certFile.IsEmpty() && caCertFile.IsEmpty()) {
Log(LogInformation, "cli")
<< "Please add the '--help' parameter to see all available options.";
return ServiceOK;
}
return ServiceOK;
}
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