1 /*
2 *
3 * Copyright 2015 gRPC authors.
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 *
17 */
18
19 #include "test/core/security/oauth2_utils.h"
20
21 #include <string.h>
22
23 #include <grpc/grpc.h>
24 #include <grpc/grpc_security.h>
25 #include <grpc/slice.h>
26 #include <grpc/support/alloc.h>
27 #include <grpc/support/log.h>
28 #include <grpc/support/sync.h>
29
30 #include "src/core/lib/iomgr/exec_ctx.h"
31 #include "src/core/lib/security/credentials/credentials.h"
32
33 typedef struct {
34 gpr_mu* mu;
35 grpc_polling_entity pops;
36 bool is_done;
37 char* token;
38
39 grpc_credentials_mdelem_array md_array;
40 grpc_closure closure;
41 } oauth2_request;
42
on_oauth2_response(void * arg,grpc_error_handle error)43 static void on_oauth2_response(void* arg, grpc_error_handle error) {
44 oauth2_request* request = static_cast<oauth2_request*>(arg);
45 char* token = nullptr;
46 grpc_slice token_slice;
47 if (error != GRPC_ERROR_NONE) {
48 gpr_log(GPR_ERROR, "Fetching token failed: %s",
49 grpc_error_std_string(error).c_str());
50 } else {
51 GPR_ASSERT(request->md_array.size == 1);
52 token_slice = GRPC_MDVALUE(request->md_array.md[0]);
53 token = static_cast<char*>(gpr_malloc(GRPC_SLICE_LENGTH(token_slice) + 1));
54 memcpy(token, GRPC_SLICE_START_PTR(token_slice),
55 GRPC_SLICE_LENGTH(token_slice));
56 token[GRPC_SLICE_LENGTH(token_slice)] = '\0';
57 }
58 grpc_credentials_mdelem_array_destroy(&request->md_array);
59 gpr_mu_lock(request->mu);
60 request->is_done = true;
61 request->token = token;
62 GRPC_LOG_IF_ERROR(
63 "pollset_kick",
64 grpc_pollset_kick(grpc_polling_entity_pollset(&request->pops), nullptr));
65 gpr_mu_unlock(request->mu);
66 }
67
do_nothing(void *,grpc_error_handle)68 static void do_nothing(void* /*arg*/, grpc_error_handle /*error*/) {}
69
grpc_test_fetch_oauth2_token_with_credentials(grpc_call_credentials * creds)70 char* grpc_test_fetch_oauth2_token_with_credentials(
71 grpc_call_credentials* creds) {
72 oauth2_request request;
73 memset(&request, 0, sizeof(request));
74 grpc_core::ExecCtx exec_ctx;
75 grpc_closure do_nothing_closure;
76 grpc_auth_metadata_context null_ctx = {"", "", nullptr, nullptr};
77
78 grpc_pollset* pollset =
79 static_cast<grpc_pollset*>(gpr_zalloc(grpc_pollset_size()));
80 grpc_pollset_init(pollset, &request.mu);
81 request.pops = grpc_polling_entity_create_from_pollset(pollset);
82 request.is_done = false;
83
84 GRPC_CLOSURE_INIT(&do_nothing_closure, do_nothing, nullptr,
85 grpc_schedule_on_exec_ctx);
86
87 GRPC_CLOSURE_INIT(&request.closure, on_oauth2_response, &request,
88 grpc_schedule_on_exec_ctx);
89
90 grpc_error_handle error = GRPC_ERROR_NONE;
91 if (creds->get_request_metadata(&request.pops, null_ctx, &request.md_array,
92 &request.closure, &error)) {
93 // Synchronous result; invoke callback directly.
94 on_oauth2_response(&request, error);
95 GRPC_ERROR_UNREF(error);
96 }
97 grpc_core::ExecCtx::Get()->Flush();
98
99 gpr_mu_lock(request.mu);
100 while (!request.is_done) {
101 grpc_pollset_worker* worker = nullptr;
102 if (!GRPC_LOG_IF_ERROR(
103 "pollset_work",
104 grpc_pollset_work(grpc_polling_entity_pollset(&request.pops),
105 &worker, GRPC_MILLIS_INF_FUTURE))) {
106 request.is_done = true;
107 }
108 }
109 gpr_mu_unlock(request.mu);
110
111 grpc_pollset_shutdown(grpc_polling_entity_pollset(&request.pops),
112 &do_nothing_closure);
113 grpc_core::ExecCtx::Get()->Flush();
114 grpc_pollset_destroy(grpc_polling_entity_pollset(&request.pops));
115 gpr_free(pollset);
116 return request.token;
117 }
118