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/*
*
* Copyright 2015, 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 <stdio.h>
#include <string.h>
#include <grpc/grpc.h>
#include <grpc/grpc_security.h>
#include <grpc/support/alloc.h>
#include <grpc/support/cmdline.h>
#include <grpc/support/log.h>
#include <grpc/support/slice.h>
#include <grpc/support/sync.h>
#include "src/core/lib/security/credentials.h"
#include "src/core/lib/support/string.h"
typedef struct {
gpr_mu *mu;
grpc_pollset *pollset;
int is_done;
} synchronizer;
static void on_metadata_response(grpc_exec_ctx *exec_ctx, void *user_data,
grpc_credentials_md *md_elems, size_t num_md,
grpc_credentials_status status) {
synchronizer *sync = user_data;
if (status == GRPC_CREDENTIALS_ERROR) {
fprintf(stderr, "Fetching token failed.\n");
} else {
char *token;
GPR_ASSERT(num_md == 1);
token = gpr_dump_slice(md_elems[0].value, GPR_DUMP_ASCII);
printf("\nGot token: %s\n\n", token);
gpr_free(token);
}
gpr_mu_lock(sync->mu);
sync->is_done = 1;
grpc_pollset_kick(sync->pollset, NULL);
gpr_mu_unlock(sync->mu);
}
int main(int argc, char **argv) {
int result = 0;
grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT;
synchronizer sync;
grpc_channel_credentials *creds = NULL;
char *service_url = "https://test.foo.google.com/Foo";
grpc_auth_metadata_context context;
gpr_cmdline *cl = gpr_cmdline_create("print_google_default_creds_token");
gpr_cmdline_add_string(cl, "service_url",
"Service URL for the token request.", &service_url);
gpr_cmdline_parse(cl, argc, argv);
memset(&context, 0, sizeof(context));
context.service_url = service_url;
grpc_init();
creds = grpc_google_default_credentials_create();
if (creds == NULL) {
fprintf(stderr, "\nCould not find default credentials.\n\n");
result = 1;
goto end;
}
sync.pollset = gpr_malloc(grpc_pollset_size());
grpc_pollset_init(sync.pollset, &sync.mu);
sync.is_done = 0;
grpc_call_credentials_get_request_metadata(
&exec_ctx, ((grpc_composite_channel_credentials *)creds)->call_creds,
sync.pollset, context, on_metadata_response, &sync);
gpr_mu_lock(sync.mu);
while (!sync.is_done) {
grpc_pollset_worker *worker = NULL;
grpc_pollset_work(&exec_ctx, sync.pollset, &worker,
gpr_now(GPR_CLOCK_MONOTONIC),
gpr_inf_future(GPR_CLOCK_MONOTONIC));
gpr_mu_unlock(sync.mu);
grpc_exec_ctx_flush(&exec_ctx);
gpr_mu_lock(sync.mu);
}
gpr_mu_unlock(sync.mu);
grpc_exec_ctx_finish(&exec_ctx);
grpc_channel_credentials_release(creds);
gpr_free(sync.pollset);
end:
gpr_cmdline_destroy(cl);
grpc_shutdown();
return result;
}
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