1 /*
2 * Copyright (c) 2021-2022 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16 #include "huks_napi_export_key.h"
17
18 #include "securec.h"
19
20 #include "hks_api.h"
21 #include "hks_log.h"
22 #include "hks_mem.h"
23 #include "hks_param.h"
24 #include "hks_type.h"
25 #include "huks_napi_common.h"
26
27 namespace HuksNapi {
28 namespace {
29 constexpr int HUKS_NAPI_EXPORT_KEY_MIN_ARGS = 2;
30 constexpr int HUKS_NAPI_EXPORT_KEY_MAX_ARGS = 3;
31 } // namespace
32
33 struct ExportKeyAsyncContextT {
34 napi_async_work asyncWork = nullptr;
35 napi_deferred deferred = nullptr;
36 napi_ref callback = nullptr;
37
38 int32_t result = 0;
39 struct HksBlob *keyAlias = nullptr;
40 struct HksParamSet *paramSet = nullptr;
41 struct HksBlob *key = nullptr;
42 };
43 using ExportKeyAsyncContext = ExportKeyAsyncContextT *;
44
CreateExportKeyAsyncContext()45 static ExportKeyAsyncContext CreateExportKeyAsyncContext()
46 {
47 ExportKeyAsyncContext context = static_cast<ExportKeyAsyncContext>(HksMalloc(sizeof(ExportKeyAsyncContextT)));
48 if (context != nullptr) {
49 (void)memset_s(context, sizeof(ExportKeyAsyncContextT), 0, sizeof(ExportKeyAsyncContextT));
50 }
51 return context;
52 }
53
DeleteExportKeyAsyncContext(napi_env env,ExportKeyAsyncContext & context)54 static void DeleteExportKeyAsyncContext(napi_env env, ExportKeyAsyncContext &context)
55 {
56 if (context == nullptr) {
57 return;
58 }
59 if (context->key != nullptr) {
60 if (context->key->data != nullptr && context->key->size != 0) {
61 (void)memset_s(context->key->data, context->key->size, 0, context->key->size);
62 }
63 FreeHksBlob(context->key);
64 }
65 DeleteCommonAsyncContext(env, context->asyncWork, context->callback, context->keyAlias, context->paramSet);
66 HKS_FREE(context);
67 context = nullptr;
68 }
69
ExportKeyParseParams(napi_env env,napi_callback_info info,ExportKeyAsyncContext context)70 static napi_value ExportKeyParseParams(napi_env env, napi_callback_info info, ExportKeyAsyncContext context)
71 {
72 size_t argc = HUKS_NAPI_EXPORT_KEY_MAX_ARGS;
73 napi_value argv[HUKS_NAPI_EXPORT_KEY_MAX_ARGS] = { 0 };
74 NAPI_CALL(env, napi_get_cb_info(env, info, &argc, argv, nullptr, nullptr));
75
76 if (argc < HUKS_NAPI_EXPORT_KEY_MIN_ARGS) {
77 napi_throw_error(env, nullptr, "invalid arguments");
78 HKS_LOG_E("no enough params");
79 return nullptr;
80 }
81
82 size_t index = 0;
83 napi_value result = ParseKeyAliasAndHksParamSet(env, argv, index, context->keyAlias, context->paramSet);
84 if (result == nullptr) {
85 HKS_LOG_E("exportKey parse params failed");
86 return nullptr;
87 }
88
89 index++;
90 if (index < argc) {
91 context->callback = GetCallback(env, argv[index]);
92 }
93
94 return GetInt32(env, 0);
95 }
96
ExportKeyWriteResult(napi_env env,ExportKeyAsyncContext context)97 static napi_value ExportKeyWriteResult(napi_env env, ExportKeyAsyncContext context)
98 {
99 return GenerateHksResult(env,
100 context->result,
101 ((context->result == HKS_SUCCESS && context->key != nullptr) ? context->key->data : nullptr),
102 (context->result == HKS_SUCCESS && context->key != nullptr) ? context->key->size : 0);
103 }
104
PrePareExportKeyContextBuffer(ExportKeyAsyncContext context)105 static int32_t PrePareExportKeyContextBuffer(ExportKeyAsyncContext context)
106 {
107 context->key = static_cast<HksBlob *>(HksMalloc(sizeof(HksBlob)));
108 if (context->key == nullptr) {
109 return HKS_ERROR_MALLOC_FAIL;
110 }
111
112 context->key->data = static_cast<uint8_t *>(HksMalloc(MAX_KEY_SIZE));
113 if (context->key->data == nullptr) {
114 return HKS_ERROR_MALLOC_FAIL;
115 }
116 context->key->size = MAX_KEY_SIZE;
117 return HKS_SUCCESS;
118 }
119
ExportKeyAsyncWork(napi_env env,ExportKeyAsyncContext & context)120 static napi_value ExportKeyAsyncWork(napi_env env, ExportKeyAsyncContext &context)
121 {
122 napi_value promise = nullptr;
123 if (context->callback == nullptr) {
124 NAPI_CALL(env, napi_create_promise(env, &context->deferred, &promise));
125 }
126
127 napi_value resourceName = nullptr;
128 napi_create_string_latin1(env, "exportKeyAsyncWork", NAPI_AUTO_LENGTH, &resourceName);
129
130 napi_create_async_work(
131 env,
132 nullptr,
133 resourceName,
134 [](napi_env env, void *data) {
135 (void)env;
136 ExportKeyAsyncContext napiContext = static_cast<ExportKeyAsyncContext>(data);
137 int32_t ret = PrePareExportKeyContextBuffer(napiContext);
138 if (ret == HKS_SUCCESS) {
139 napiContext->result = HksExportPublicKey(napiContext->keyAlias,
140 napiContext->paramSet, napiContext->key);
141 } else {
142 napiContext->result = ret;
143 }
144 },
145 [](napi_env env, napi_status status, void *data) {
146 ExportKeyAsyncContext napiContext = static_cast<ExportKeyAsyncContext>(data);
147 napi_value result = ExportKeyWriteResult(env, napiContext);
148 if (napiContext->callback == nullptr) {
149 napi_resolve_deferred(env, napiContext->deferred, result);
150 } else if (result != nullptr) {
151 CallAsyncCallback(env, napiContext->callback, napiContext->result, result);
152 }
153 DeleteExportKeyAsyncContext(env, napiContext);
154 },
155 static_cast<void *>(context),
156 &context->asyncWork);
157
158 napi_status status = napi_queue_async_work(env, context->asyncWork);
159 if (status != napi_ok) {
160 GET_AND_THROW_LAST_ERROR((env));
161 DeleteExportKeyAsyncContext(env, context);
162 HKS_LOG_E("could not queue async work");
163 return nullptr;
164 }
165
166 if (context->callback == nullptr) {
167 return promise;
168 } else {
169 return GetNull(env);
170 }
171 }
172
HuksNapiExportKey(napi_env env,napi_callback_info info)173 napi_value HuksNapiExportKey(napi_env env, napi_callback_info info)
174 {
175 ExportKeyAsyncContext context = CreateExportKeyAsyncContext();
176 if (context == nullptr) {
177 HKS_LOG_E("could not create context");
178 return nullptr;
179 }
180
181 napi_value result = ExportKeyParseParams(env, info, context);
182 if (result == nullptr) {
183 HKS_LOG_E("could not parse params");
184 DeleteExportKeyAsyncContext(env, context);
185 return nullptr;
186 }
187
188 result = ExportKeyAsyncWork(env, context);
189 if (result == nullptr) {
190 HKS_LOG_E("could not start async work");
191 DeleteExportKeyAsyncContext(env, context);
192 return nullptr;
193 }
194 return result;
195 }
196 } // namespace HuksNapi
197