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/*
*
* Copyright 2016 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 "src/core/lib/security/credentials/ssl/ssl_credentials.h"
#include <string.h>
#include "src/core/lib/channel/channel_args.h"
#include "src/core/lib/surface/api_trace.h"
#include <grpc/support/alloc.h>
#include <grpc/support/log.h>
#include <grpc/support/string_util.h>
//
// SSL Channel Credentials.
//
static void ssl_config_pem_key_cert_pair_destroy(
tsi_ssl_pem_key_cert_pair *kp) {
if (kp == NULL) return;
gpr_free((void *)kp->private_key);
gpr_free((void *)kp->cert_chain);
}
static void ssl_destruct(grpc_exec_ctx *exec_ctx,
grpc_channel_credentials *creds) {
grpc_ssl_credentials *c = (grpc_ssl_credentials *)creds;
gpr_free(c->config.pem_root_certs);
ssl_config_pem_key_cert_pair_destroy(&c->config.pem_key_cert_pair);
}
static grpc_security_status ssl_create_security_connector(
grpc_exec_ctx *exec_ctx, grpc_channel_credentials *creds,
grpc_call_credentials *call_creds, const char *target,
const grpc_channel_args *args, grpc_channel_security_connector **sc,
grpc_channel_args **new_args) {
grpc_ssl_credentials *c = (grpc_ssl_credentials *)creds;
grpc_security_status status = GRPC_SECURITY_OK;
const char *overridden_target_name = NULL;
for (size_t i = 0; args && i < args->num_args; i++) {
grpc_arg *arg = &args->args[i];
if (strcmp(arg->key, GRPC_SSL_TARGET_NAME_OVERRIDE_ARG) == 0 &&
arg->type == GRPC_ARG_STRING) {
overridden_target_name = arg->value.string;
break;
}
}
status = grpc_ssl_channel_security_connector_create(
exec_ctx, call_creds, &c->config, target, overridden_target_name, sc);
if (status != GRPC_SECURITY_OK) {
return status;
}
grpc_arg new_arg = grpc_channel_arg_string_create(
(char *)GRPC_ARG_HTTP2_SCHEME, (char *)"https");
*new_args = grpc_channel_args_copy_and_add(args, &new_arg, 1);
return status;
}
static grpc_channel_credentials_vtable ssl_vtable = {
ssl_destruct, ssl_create_security_connector, NULL};
static void ssl_build_config(const char *pem_root_certs,
grpc_ssl_pem_key_cert_pair *pem_key_cert_pair,
grpc_ssl_config *config) {
if (pem_root_certs != NULL) {
config->pem_root_certs = gpr_strdup(pem_root_certs);
}
if (pem_key_cert_pair != NULL) {
GPR_ASSERT(pem_key_cert_pair->private_key != NULL);
GPR_ASSERT(pem_key_cert_pair->cert_chain != NULL);
config->pem_key_cert_pair.cert_chain =
gpr_strdup(pem_key_cert_pair->cert_chain);
config->pem_key_cert_pair.private_key =
gpr_strdup(pem_key_cert_pair->private_key);
}
}
grpc_channel_credentials *grpc_ssl_credentials_create(
const char *pem_root_certs, grpc_ssl_pem_key_cert_pair *pem_key_cert_pair,
void *reserved) {
grpc_ssl_credentials *c =
(grpc_ssl_credentials *)gpr_zalloc(sizeof(grpc_ssl_credentials));
GRPC_API_TRACE(
"grpc_ssl_credentials_create(pem_root_certs=%s, "
"pem_key_cert_pair=%p, "
"reserved=%p)",
3, (pem_root_certs, pem_key_cert_pair, reserved));
GPR_ASSERT(reserved == NULL);
c->base.type = GRPC_CHANNEL_CREDENTIALS_TYPE_SSL;
c->base.vtable = &ssl_vtable;
gpr_ref_init(&c->base.refcount, 1);
ssl_build_config(pem_root_certs, pem_key_cert_pair, &c->config);
return &c->base;
}
//
// SSL Server Credentials.
//
static void ssl_server_destruct(grpc_exec_ctx *exec_ctx,
grpc_server_credentials *creds) {
grpc_ssl_server_credentials *c = (grpc_ssl_server_credentials *)creds;
size_t i;
for (i = 0; i < c->config.num_key_cert_pairs; i++) {
ssl_config_pem_key_cert_pair_destroy(&c->config.pem_key_cert_pairs[i]);
}
gpr_free(c->config.pem_key_cert_pairs);
gpr_free(c->config.pem_root_certs);
}
static grpc_security_status ssl_server_create_security_connector(
grpc_exec_ctx *exec_ctx, grpc_server_credentials *creds,
grpc_server_security_connector **sc) {
grpc_ssl_server_credentials *c = (grpc_ssl_server_credentials *)creds;
return grpc_ssl_server_security_connector_create(exec_ctx, &c->config, sc);
}
static grpc_server_credentials_vtable ssl_server_vtable = {
ssl_server_destruct, ssl_server_create_security_connector};
static void ssl_build_server_config(
const char *pem_root_certs, grpc_ssl_pem_key_cert_pair *pem_key_cert_pairs,
size_t num_key_cert_pairs,
grpc_ssl_client_certificate_request_type client_certificate_request,
grpc_ssl_server_config *config) {
size_t i;
config->client_certificate_request = client_certificate_request;
if (pem_root_certs != NULL) {
config->pem_root_certs = gpr_strdup(pem_root_certs);
}
if (num_key_cert_pairs > 0) {
GPR_ASSERT(pem_key_cert_pairs != NULL);
config->pem_key_cert_pairs = (tsi_ssl_pem_key_cert_pair *)gpr_zalloc(
num_key_cert_pairs * sizeof(tsi_ssl_pem_key_cert_pair));
}
config->num_key_cert_pairs = num_key_cert_pairs;
for (i = 0; i < num_key_cert_pairs; i++) {
GPR_ASSERT(pem_key_cert_pairs[i].private_key != NULL);
GPR_ASSERT(pem_key_cert_pairs[i].cert_chain != NULL);
config->pem_key_cert_pairs[i].cert_chain =
gpr_strdup(pem_key_cert_pairs[i].cert_chain);
config->pem_key_cert_pairs[i].private_key =
gpr_strdup(pem_key_cert_pairs[i].private_key);
}
}
grpc_server_credentials *grpc_ssl_server_credentials_create(
const char *pem_root_certs, grpc_ssl_pem_key_cert_pair *pem_key_cert_pairs,
size_t num_key_cert_pairs, int force_client_auth, void *reserved) {
return grpc_ssl_server_credentials_create_ex(
pem_root_certs, pem_key_cert_pairs, num_key_cert_pairs,
force_client_auth
? GRPC_SSL_REQUEST_AND_REQUIRE_CLIENT_CERTIFICATE_AND_VERIFY
: GRPC_SSL_DONT_REQUEST_CLIENT_CERTIFICATE,
reserved);
}
grpc_server_credentials *grpc_ssl_server_credentials_create_ex(
const char *pem_root_certs, grpc_ssl_pem_key_cert_pair *pem_key_cert_pairs,
size_t num_key_cert_pairs,
grpc_ssl_client_certificate_request_type client_certificate_request,
void *reserved) {
grpc_ssl_server_credentials *c = (grpc_ssl_server_credentials *)gpr_zalloc(
sizeof(grpc_ssl_server_credentials));
GRPC_API_TRACE(
"grpc_ssl_server_credentials_create_ex("
"pem_root_certs=%s, pem_key_cert_pairs=%p, num_key_cert_pairs=%lu, "
"client_certificate_request=%d, reserved=%p)",
5, (pem_root_certs, pem_key_cert_pairs, (unsigned long)num_key_cert_pairs,
client_certificate_request, reserved));
GPR_ASSERT(reserved == NULL);
c->base.type = GRPC_CHANNEL_CREDENTIALS_TYPE_SSL;
gpr_ref_init(&c->base.refcount, 1);
c->base.vtable = &ssl_server_vtable;
ssl_build_server_config(pem_root_certs, pem_key_cert_pairs,
num_key_cert_pairs, client_certificate_request,
&c->config);
return &c->base;
}
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