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#include <functional>
#include "log/frontend.h"
#include "server/certificate_handler.h"
#include "server/json_output.h"
#include "util/json_wrapper.h"
#include "util/status.h"
#include "util/thread_pool.h"
namespace cert_trans {
using ct::LogEntry;
using ct::SignedCertificateTimestamp;
using std::bind;
using std::make_shared;
using std::move;
using std::multimap;
using std::placeholders::_1;
using std::shared_ptr;
using std::string;
using std::unique_ptr;
using util::Status;
namespace {
bool ExtractChain(libevent::Base* base, evhttp_request* req,
CertChain* chain) {
if (evhttp_request_get_command(req) != EVHTTP_REQ_POST) {
SendJsonError(base, req, HTTP_BADMETHOD, "Method not allowed.");
return false;
}
// TODO(pphaneuf): Should we check that Content-Type says
// "application/json", as recommended by RFC4627?
JsonObject json_body(evhttp_request_get_input_buffer(req));
if (!json_body.Ok() || !json_body.IsType(json_type_object)) {
SendJsonError(base, req, HTTP_BADREQUEST,
"Unable to parse provided JSON.");
return false;
}
JsonArray json_chain(json_body, "chain");
if (!json_chain.Ok()) {
SendJsonError(base, req, HTTP_BADREQUEST,
"Unable to parse provided JSON.");
return false;
}
VLOG(2) << "ExtractChain chain:\n" << json_chain.DebugString();
for (int i = 0; i < json_chain.Length(); ++i) {
JsonString json_cert(json_chain, i);
if (!json_cert.Ok()) {
SendJsonError(base, req, HTTP_BADREQUEST,
"Unable to parse provided JSON.");
return false;
}
unique_ptr<Cert> cert(Cert::FromDerString(json_cert.FromBase64()));
if (!cert) {
SendJsonError(base, req, HTTP_BADREQUEST,
"Unable to parse provided chain.");
return false;
}
chain->AddCert(move(cert));
}
return true;
}
CertSubmissionHandler* MaybeCreateSubmissionHandler(
const CertChecker* checker) {
if (checker != nullptr) {
return new CertSubmissionHandler(checker);
}
return nullptr;
}
} // namespace
CertificateHttpHandler::CertificateHttpHandler(
LogLookup* log_lookup, const ReadOnlyDatabase* db,
const ClusterStateController* controller, const CertChecker* cert_checker,
Frontend* frontend, ThreadPool* pool, libevent::Base* event_base,
StalenessTracker* staleness_tracker)
: HttpHandler(log_lookup, db, controller, pool, event_base,
staleness_tracker),
cert_checker_(cert_checker),
submission_handler_(MaybeCreateSubmissionHandler(cert_checker_)),
frontend_(frontend) {
}
void CertificateHttpHandler::AddHandlers(libevent::HttpServer* server) {
// TODO(alcutter): Support this for mirrors too
if (cert_checker_) {
// Don't really need to proxy this one, but may as well just to keep
// everything tidy:
AddProxyWrappedHandler(server, "/ct/v1/get-roots",
bind(&CertificateHttpHandler::GetRoots, this, _1));
}
if (frontend_) {
// Proxy the add-* calls too, technically we could serve them, but a
// more up-to-date node will have a better chance of handling dupes
// correctly, rather than bloating the tree.
AddProxyWrappedHandler(server, "/ct/v1/add-chain",
bind(&CertificateHttpHandler::AddChain, this, _1));
AddProxyWrappedHandler(server, "/ct/v1/add-pre-chain",
bind(&CertificateHttpHandler::AddPreChain, this,
_1));
}
}
void CertificateHttpHandler::GetRoots(evhttp_request* req) const {
if (evhttp_request_get_command(req) != EVHTTP_REQ_GET) {
return SendJsonError(event_base_, req, HTTP_BADMETHOD,
"Method not allowed.");
}
JsonArray roots;
for (const auto& trusted_cert : cert_checker_->GetTrustedCertificates()) {
string cert;
if (trusted_cert.second->DerEncoding(&cert) != util::Status::OK) {
LOG(ERROR) << "Cert encoding failed";
return SendJsonError(event_base_, req, HTTP_INTERNAL,
"Serialisation failed.");
}
roots.AddBase64(cert);
}
JsonObject json_reply;
json_reply.Add("certificates", roots);
SendJsonReply(event_base_, req, HTTP_OK, json_reply);
}
void CertificateHttpHandler::AddChain(evhttp_request* req) {
const shared_ptr<CertChain> chain(make_shared<CertChain>());
if (!ExtractChain(event_base_, req, chain.get())) {
return;
}
pool_->Add(
bind(&CertificateHttpHandler::BlockingAddChain, this, req, chain));
}
void CertificateHttpHandler::AddPreChain(evhttp_request* req) {
const shared_ptr<PreCertChain> chain(make_shared<PreCertChain>());
if (!ExtractChain(event_base_, req, chain.get())) {
return;
}
pool_->Add(
bind(&CertificateHttpHandler::BlockingAddPreChain, this, req, chain));
}
void CertificateHttpHandler::BlockingAddChain(
evhttp_request* req, const shared_ptr<CertChain>& chain) const {
SignedCertificateTimestamp sct;
LogEntry entry;
const Status status(frontend_->QueueProcessedEntry(
submission_handler_->ProcessX509Submission(chain.get(), &entry), entry,
&sct));
AddEntryReply(req, status, sct);
}
void CertificateHttpHandler::BlockingAddPreChain(
evhttp_request* req, const shared_ptr<PreCertChain>& chain) const {
SignedCertificateTimestamp sct;
LogEntry entry;
const Status status(frontend_->QueueProcessedEntry(
submission_handler_->ProcessPreCertSubmission(chain.get(), &entry),
entry, &sct));
AddEntryReply(req, status, sct);
}
} // namespace cert_trans
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