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//
// Copyright 2021 gRPC authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
#include "y_absl/container/inlined_vector.h"
#include "y_absl/status/status.h"
#include <grpc/grpc_security.h>
#include <grpc/support/alloc.h>
#include <grpc/support/string_util.h>
#include <grpcpp/security/tls_certificate_verifier.h>
namespace grpc {
namespace experimental {
static internal::GrpcLibraryInitializer g_gli_initializer;
TlsCustomVerificationCheckRequest::TlsCustomVerificationCheckRequest(
grpc_tls_custom_verification_check_request* request)
: c_request_(request) {
GPR_ASSERT(c_request_ != nullptr);
}
grpc::string_ref TlsCustomVerificationCheckRequest::target_name() const {
return c_request_->target_name != nullptr ? c_request_->target_name : "";
}
grpc::string_ref TlsCustomVerificationCheckRequest::peer_cert() const {
return c_request_->peer_info.peer_cert != nullptr
? c_request_->peer_info.peer_cert
: "";
}
grpc::string_ref TlsCustomVerificationCheckRequest::peer_cert_full_chain()
const {
return c_request_->peer_info.peer_cert_full_chain != nullptr
? c_request_->peer_info.peer_cert_full_chain
: "";
}
grpc::string_ref TlsCustomVerificationCheckRequest::common_name() const {
return c_request_->peer_info.common_name != nullptr
? c_request_->peer_info.common_name
: "";
}
std::vector<grpc::string_ref> TlsCustomVerificationCheckRequest::uri_names()
const {
std::vector<grpc::string_ref> uri_names;
for (size_t i = 0; i < c_request_->peer_info.san_names.uri_names_size; ++i) {
uri_names.emplace_back(c_request_->peer_info.san_names.uri_names[i]);
}
return uri_names;
}
std::vector<grpc::string_ref> TlsCustomVerificationCheckRequest::dns_names()
const {
std::vector<grpc::string_ref> dns_names;
for (size_t i = 0; i < c_request_->peer_info.san_names.dns_names_size; ++i) {
dns_names.emplace_back(c_request_->peer_info.san_names.dns_names[i]);
}
return dns_names;
}
std::vector<grpc::string_ref> TlsCustomVerificationCheckRequest::email_names()
const {
std::vector<grpc::string_ref> email_names;
for (size_t i = 0; i < c_request_->peer_info.san_names.email_names_size;
++i) {
email_names.emplace_back(c_request_->peer_info.san_names.email_names[i]);
}
return email_names;
}
std::vector<grpc::string_ref> TlsCustomVerificationCheckRequest::ip_names()
const {
std::vector<grpc::string_ref> ip_names;
for (size_t i = 0; i < c_request_->peer_info.san_names.ip_names_size; ++i) {
ip_names.emplace_back(c_request_->peer_info.san_names.ip_names[i]);
}
return ip_names;
}
CertificateVerifier::CertificateVerifier(grpc_tls_certificate_verifier* v)
: verifier_(v) {
g_gli_initializer.summon();
}
CertificateVerifier::~CertificateVerifier() {
grpc_tls_certificate_verifier_release(verifier_);
}
bool CertificateVerifier::Verify(TlsCustomVerificationCheckRequest* request,
std::function<void(grpc::Status)> callback,
grpc::Status* sync_status) {
GPR_ASSERT(request != nullptr);
GPR_ASSERT(request->c_request() != nullptr);
{
internal::MutexLock lock(&mu_);
request_map_.emplace(request->c_request(), std::move(callback));
}
grpc_status_code status_code = GRPC_STATUS_OK;
char* error_details = nullptr;
bool is_done = grpc_tls_certificate_verifier_verify(
verifier_, request->c_request(), &AsyncCheckDone, this, &status_code,
&error_details);
if (is_done) {
if (status_code != GRPC_STATUS_OK) {
*sync_status = grpc::Status(static_cast<grpc::StatusCode>(status_code),
error_details);
}
internal::MutexLock lock(&mu_);
request_map_.erase(request->c_request());
}
gpr_free(error_details);
return is_done;
}
void CertificateVerifier::Cancel(TlsCustomVerificationCheckRequest* request) {
GPR_ASSERT(request != nullptr);
GPR_ASSERT(request->c_request() != nullptr);
grpc_tls_certificate_verifier_cancel(verifier_, request->c_request());
}
void CertificateVerifier::AsyncCheckDone(
grpc_tls_custom_verification_check_request* request, void* callback_arg,
grpc_status_code status, const char* error_details) {
auto* self = static_cast<CertificateVerifier*>(callback_arg);
std::function<void(grpc::Status)> callback;
{
internal::MutexLock lock(&self->mu_);
auto it = self->request_map_.find(request);
if (it != self->request_map_.end()) {
callback = std::move(it->second);
self->request_map_.erase(it);
}
}
if (callback != nullptr) {
grpc::Status return_status;
if (status != GRPC_STATUS_OK) {
return_status =
grpc::Status(static_cast<grpc::StatusCode>(status), error_details);
}
callback(return_status);
}
}
ExternalCertificateVerifier::ExternalCertificateVerifier() {
base_ = new grpc_tls_certificate_verifier_external();
base_->user_data = this;
base_->verify = VerifyInCoreExternalVerifier;
base_->cancel = CancelInCoreExternalVerifier;
base_->destruct = DestructInCoreExternalVerifier;
}
ExternalCertificateVerifier::~ExternalCertificateVerifier() { delete base_; }
int ExternalCertificateVerifier::VerifyInCoreExternalVerifier(
void* user_data, grpc_tls_custom_verification_check_request* request,
grpc_tls_on_custom_verification_check_done_cb callback, void* callback_arg,
grpc_status_code* sync_status, char** sync_error_details) {
auto* self = static_cast<ExternalCertificateVerifier*>(user_data);
TlsCustomVerificationCheckRequest* cpp_request = nullptr;
{
internal::MutexLock lock(&self->mu_);
auto pair = self->request_map_.emplace(
request, AsyncRequestState(callback, callback_arg, request));
GPR_ASSERT(pair.second);
cpp_request = &pair.first->second.cpp_request;
}
grpc::Status sync_current_verifier_status;
bool is_done = self->Verify(
cpp_request,
[self, request](grpc::Status status) {
grpc_tls_on_custom_verification_check_done_cb callback = nullptr;
void* callback_arg = nullptr;
{
internal::MutexLock lock(&self->mu_);
auto it = self->request_map_.find(request);
if (it != self->request_map_.end()) {
callback = it->second.callback;
callback_arg = it->second.callback_arg;
self->request_map_.erase(it);
}
}
if (callback != nullptr) {
callback(request, callback_arg,
static_cast<grpc_status_code>(status.error_code()),
status.error_message().c_str());
}
},
&sync_current_verifier_status);
if (is_done) {
if (!sync_current_verifier_status.ok()) {
*sync_status = static_cast<grpc_status_code>(
sync_current_verifier_status.error_code());
*sync_error_details =
gpr_strdup(sync_current_verifier_status.error_message().c_str());
}
internal::MutexLock lock(&self->mu_);
self->request_map_.erase(request);
}
return is_done;
}
void ExternalCertificateVerifier::CancelInCoreExternalVerifier(
void* user_data, grpc_tls_custom_verification_check_request* request) {
auto* self = static_cast<ExternalCertificateVerifier*>(user_data);
TlsCustomVerificationCheckRequest* cpp_request = nullptr;
{
internal::MutexLock lock(&self->mu_);
auto it = self->request_map_.find(request);
if (it != self->request_map_.end()) {
cpp_request = &it->second.cpp_request;
}
}
if (cpp_request != nullptr) {
self->Cancel(cpp_request);
}
}
void ExternalCertificateVerifier::DestructInCoreExternalVerifier(
void* user_data) {
auto* self = static_cast<ExternalCertificateVerifier*>(user_data);
delete self;
}
HostNameCertificateVerifier::HostNameCertificateVerifier()
: CertificateVerifier(grpc_tls_certificate_verifier_host_name_create()) {}
} // namespace experimental
} // namespace grpc
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