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ApiListener: verify peer

This commit is contained in:
Alexander A. Klimov 2019-02-12 14:56:25 +01:00
parent 720c53ab77
commit 539855bac1
1 changed files with 65 additions and 0 deletions
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65
lib/remote/apilistener.cpp
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@ -24,11 +24,14 @@
#include <boost/asio/spawn.hpp>
#include <boost/asio/ssl/context.hpp>
#include <boost/asio/ssl/stream.hpp>
#include <boost/asio/ssl/verify_context.hpp>
#include <boost/asio/ssl/verify_mode.hpp>
#include <climits>
#include <fstream>
#include <memory>
#include <openssl/ssl.h>
#include <openssl/tls1.h>
#include <openssl/x509.h>
#include <sstream>
using namespace icinga;
@ -668,6 +671,23 @@ void ApiListener::NewClientHandlerInternal(boost::asio::yield_context yc, const
client->set_verify_mode(ssl::verify_peer | ssl::verify_client_once);
bool verify_ok = false;
String verifyError;
client->set_verify_callback([&verify_ok, &verifyError](bool preverified, ssl::verify_context& ctx) {
verify_ok = preverified;
if (!preverified) {
std::ostringstream msgbuf;
int err = X509_STORE_CTX_get_error(ctx.native_handle());
msgbuf << "code " << err << ": " << X509_verify_cert_error_string(err);
verifyError = msgbuf.str();
}
return preverified;
});
if (role == RoleClient) {
String environmentName = Application::GetAppEnvironment();
String serverName = hostname;
@ -687,6 +707,51 @@ void ApiListener::NewClientHandlerInternal(boost::asio::yield_context yc, const
} catch (const std::exception& ex) {
Log(LogCritical, "ApiListener")
<< "Client TLS handshake failed (" << conninfo << "): " << DiagnosticInformation(ex, false);
return;
}
std::shared_ptr<X509> cert (SSL_get_peer_certificate(client->native_handle()), X509_free);
String identity;
Endpoint::Ptr endpoint;
if (cert) {
try {
identity = GetCertificateCN(cert);
} catch (const std::exception&) {
Log(LogCritical, "ApiListener")
<< "Cannot get certificate common name from cert path: '" << GetDefaultCertPath() << "'.";
return;
}
if (!hostname.IsEmpty()) {
if (identity != hostname) {
Log(LogWarning, "ApiListener")
<< "Unexpected certificate common name while connecting to endpoint '"
<< hostname << "': got '" << identity << "'";
return;
} else if (!verify_ok) {
Log(LogWarning, "ApiListener")
<< "Certificate validation failed for endpoint '" << hostname
<< "': " << verifyError;
}
}
if (verify_ok) {
endpoint = Endpoint::GetByName(identity);
}
Log log(LogInformation, "ApiListener");
log << "New client connection for identity '" << identity << "' " << conninfo;
if (!verify_ok) {
log << " (certificate validation failed: " << verifyError << ")";
} else if (!endpoint) {
log << " (no Endpoint object found for identity)";
}
} else {
Log(LogInformation, "ApiListener")
<< "New client connection " << conninfo << " (no client certificate)";
}
}