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/*
*
* Copyright 2015 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 <grpc/support/port_platform.h>
#include "src/core/lib/http/httpcli.h"
#include <string.h>
#include <grpc/support/alloc.h>
#include <grpc/support/log.h>
#include <grpc/support/string_util.h>
#include "src/core/lib/channel/channel_args.h"
#include "src/core/lib/channel/handshaker_registry.h"
#include "src/core/lib/gpr/string.h"
#include "src/core/lib/gprpp/ref_counted_ptr.h"
#include "src/core/lib/iomgr/pollset.h"
#include "src/core/lib/security/credentials/credentials.h"
#include "src/core/lib/security/security_connector/ssl_utils.h"
#include "src/core/lib/security/transport/security_handshaker.h"
#include "src/core/lib/slice/slice_internal.h"
#include "src/core/tsi/ssl_transport_security.h"
class grpc_httpcli_ssl_channel_security_connector final
: public grpc_channel_security_connector {
public:
explicit grpc_httpcli_ssl_channel_security_connector(char* secure_peer_name)
: grpc_channel_security_connector(
/*url_scheme=*/nullptr,
/*channel_creds=*/nullptr,
/*request_metadata_creds=*/nullptr),
secure_peer_name_(secure_peer_name) {}
~grpc_httpcli_ssl_channel_security_connector() override {
if (handshaker_factory_ != nullptr) {
tsi_ssl_client_handshaker_factory_unref(handshaker_factory_);
}
if (secure_peer_name_ != nullptr) {
gpr_free(secure_peer_name_);
}
}
tsi_result InitHandshakerFactory(const char* pem_root_certs,
const tsi_ssl_root_certs_store* root_store) {
tsi_ssl_client_handshaker_options options;
memset(&options, 0, sizeof(options));
options.pem_root_certs = pem_root_certs;
options.root_store = root_store;
return tsi_create_ssl_client_handshaker_factory_with_options(
&options, &handshaker_factory_);
}
void add_handshakers(grpc_pollset_set* interested_parties,
grpc_handshake_manager* handshake_mgr) override {
tsi_handshaker* handshaker = nullptr;
if (handshaker_factory_ != nullptr) {
tsi_result result = tsi_ssl_client_handshaker_factory_create_handshaker(
handshaker_factory_, secure_peer_name_, &handshaker);
if (result != TSI_OK) {
gpr_log(GPR_ERROR, "Handshaker creation failed with error %s.",
tsi_result_to_string(result));
}
}
grpc_handshake_manager_add(
handshake_mgr, grpc_security_handshaker_create(handshaker, this));
}
tsi_ssl_client_handshaker_factory* handshaker_factory() const {
return handshaker_factory_;
}
void check_peer(tsi_peer peer,
grpc_core::RefCountedPtr<grpc_auth_context>* /*auth_context*/,
grpc_closure* on_peer_checked) override {
grpc_error* error = GRPC_ERROR_NONE;
/* Check the peer name. */
if (secure_peer_name_ != nullptr &&
!tsi_ssl_peer_matches_name(&peer, secure_peer_name_)) {
char* msg;
gpr_asprintf(&msg, "Peer name %s is not in peer certificate",
secure_peer_name_);
error = GRPC_ERROR_CREATE_FROM_COPIED_STRING(msg);
gpr_free(msg);
}
GRPC_CLOSURE_SCHED(on_peer_checked, error);
tsi_peer_destruct(&peer);
}
int cmp(const grpc_security_connector* other_sc) const override {
auto* other =
reinterpret_cast<const grpc_httpcli_ssl_channel_security_connector*>(
other_sc);
return strcmp(secure_peer_name_, other->secure_peer_name_);
}
bool check_call_host(const char* host, grpc_auth_context* auth_context,
grpc_closure* on_call_host_checked,
grpc_error** error) override {
*error = GRPC_ERROR_NONE;
return true;
}
void cancel_check_call_host(grpc_closure* on_call_host_checked,
grpc_error* error) override {
GRPC_ERROR_UNREF(error);
}
const char* secure_peer_name() const { return secure_peer_name_; }
private:
tsi_ssl_client_handshaker_factory* handshaker_factory_ = nullptr;
char* secure_peer_name_;
};
static grpc_core::RefCountedPtr<grpc_channel_security_connector>
httpcli_ssl_channel_security_connector_create(
const char* pem_root_certs, const tsi_ssl_root_certs_store* root_store,
const char* secure_peer_name) {
if (secure_peer_name != nullptr && pem_root_certs == nullptr) {
gpr_log(GPR_ERROR,
"Cannot assert a secure peer name without a trust root.");
return nullptr;
}
grpc_core::RefCountedPtr<grpc_httpcli_ssl_channel_security_connector> c =
grpc_core::MakeRefCounted<grpc_httpcli_ssl_channel_security_connector>(
secure_peer_name == nullptr ? nullptr : gpr_strdup(secure_peer_name));
tsi_result result = c->InitHandshakerFactory(pem_root_certs, root_store);
if (result != TSI_OK) {
gpr_log(GPR_ERROR, "Handshaker factory creation failed with %s.",
tsi_result_to_string(result));
return nullptr;
}
return c;
}
/* handshaker */
typedef struct {
void (*func)(void* arg, grpc_endpoint* endpoint);
void* arg;
grpc_handshake_manager* handshake_mgr;
} on_done_closure;
static void on_handshake_done(void* arg, grpc_error* error) {
grpc_handshaker_args* args = static_cast<grpc_handshaker_args*>(arg);
on_done_closure* c = static_cast<on_done_closure*>(args->user_data);
if (error != GRPC_ERROR_NONE) {
const char* msg = grpc_error_string(error);
gpr_log(GPR_ERROR, "Secure transport setup failed: %s", msg);
c->func(c->arg, nullptr);
} else {
grpc_channel_args_destroy(args->args);
grpc_slice_buffer_destroy_internal(args->read_buffer);
gpr_free(args->read_buffer);
c->func(c->arg, args->endpoint);
}
grpc_handshake_manager_destroy(c->handshake_mgr);
gpr_free(c);
}
static void ssl_handshake(void* arg, grpc_endpoint* tcp, const char* host,
grpc_millis deadline,
void (*on_done)(void* arg, grpc_endpoint* endpoint)) {
on_done_closure* c = static_cast<on_done_closure*>(gpr_malloc(sizeof(*c)));
const char* pem_root_certs =
grpc_core::DefaultSslRootStore::GetPemRootCerts();
const tsi_ssl_root_certs_store* root_store =
grpc_core::DefaultSslRootStore::GetRootStore();
if (root_store == nullptr) {
gpr_log(GPR_ERROR, "Could not get default pem root certs.");
on_done(arg, nullptr);
gpr_free(c);
return;
}
c->func = on_done;
c->arg = arg;
grpc_core::RefCountedPtr<grpc_channel_security_connector> sc =
httpcli_ssl_channel_security_connector_create(pem_root_certs, root_store,
host);
GPR_ASSERT(sc != nullptr);
grpc_arg channel_arg = grpc_security_connector_to_arg(sc.get());
grpc_channel_args args = {1, &channel_arg};
c->handshake_mgr = grpc_handshake_manager_create();
grpc_handshakers_add(HANDSHAKER_CLIENT, &args,
nullptr /* interested_parties */, c->handshake_mgr);
grpc_handshake_manager_do_handshake(
c->handshake_mgr, tcp, nullptr /* channel_args */, deadline,
nullptr /* acceptor */, on_handshake_done, c /* user_data */);
sc.reset(DEBUG_LOCATION, "httpcli");
}
const grpc_httpcli_handshaker grpc_httpcli_ssl = {"https", ssl_handshake};
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