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/*
*
* Copyright 2016, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include "src/core/lib/security/credentials/plugin/plugin_credentials.h"
#include <string.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>
#include <grpc/support/sync.h>
typedef struct {
void *user_data;
grpc_credentials_metadata_cb cb;
} grpc_metadata_plugin_request;
static void plugin_destruct(grpc_call_credentials *creds) {
grpc_plugin_credentials *c = (grpc_plugin_credentials *)creds;
if (c->plugin.state != NULL && c->plugin.destroy != NULL) {
c->plugin.destroy(c->plugin.state);
}
}
static void plugin_md_request_metadata_ready(void *request,
const grpc_metadata *md,
size_t num_md,
grpc_status_code status,
const char *error_details) {
/* called from application code */
grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
grpc_metadata_plugin_request *r = (grpc_metadata_plugin_request *)request;
if (status != GRPC_STATUS_OK) {
if (error_details != NULL) {
gpr_log(GPR_ERROR, "Getting metadata from plugin failed with error: %s",
error_details);
}
r->cb(&exec_ctx, r->user_data, NULL, 0, GRPC_CREDENTIALS_ERROR);
} else {
size_t i;
grpc_credentials_md *md_array = NULL;
if (num_md > 0) {
md_array = gpr_malloc(num_md * sizeof(grpc_credentials_md));
for (i = 0; i < num_md; i++) {
md_array[i].key = gpr_slice_from_copied_string(md[i].key);
md_array[i].value =
gpr_slice_from_copied_buffer(md[i].value, md[i].value_length);
}
}
r->cb(&exec_ctx, r->user_data, md_array, num_md, GRPC_CREDENTIALS_OK);
if (md_array != NULL) {
for (i = 0; i < num_md; i++) {
gpr_slice_unref(md_array[i].key);
gpr_slice_unref(md_array[i].value);
}
gpr_free(md_array);
}
}
gpr_free(r);
grpc_exec_ctx_finish(&exec_ctx);
}
static void plugin_get_request_metadata(grpc_exec_ctx *exec_ctx,
grpc_call_credentials *creds,
grpc_pollset *pollset,
grpc_auth_metadata_context context,
grpc_credentials_metadata_cb cb,
void *user_data) {
grpc_plugin_credentials *c = (grpc_plugin_credentials *)creds;
if (c->plugin.get_metadata != NULL) {
grpc_metadata_plugin_request *request = gpr_malloc(sizeof(*request));
memset(request, 0, sizeof(*request));
request->user_data = user_data;
request->cb = cb;
c->plugin.get_metadata(c->plugin.state, context,
plugin_md_request_metadata_ready, request);
} else {
cb(exec_ctx, user_data, NULL, 0, GRPC_CREDENTIALS_OK);
}
}
static grpc_call_credentials_vtable plugin_vtable = {
plugin_destruct, plugin_get_request_metadata};
grpc_call_credentials *grpc_metadata_credentials_create_from_plugin(
grpc_metadata_credentials_plugin plugin, void *reserved) {
grpc_plugin_credentials *c = gpr_malloc(sizeof(*c));
GRPC_API_TRACE("grpc_metadata_credentials_create_from_plugin(reserved=%p)", 1,
(reserved));
GPR_ASSERT(reserved == NULL);
memset(c, 0, sizeof(*c));
c->base.type = plugin.type;
c->base.vtable = &plugin_vtable;
gpr_ref_init(&c->base.refcount, 1);
c->plugin = plugin;
return &c->base;
}
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