1 /*
2 * Copyright (c) 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 "hash.h"
17
18 #include <cstring>
19 #include <string_view>
20 #include <tuple>
21
22 #include "filemgmt_libhilog.h"
23 #include "hash_file.h"
24
25 namespace OHOS {
26 namespace FileManagement {
27 namespace ModuleFileIO {
28 using namespace std;
29 using namespace OHOS::FileManagement::LibN;
30
GetHashAlgorithm(const string & alg)31 static HASH_ALGORITHM_TYPE GetHashAlgorithm(const string &alg)
32 {
33 return (algorithmMaps.find(alg) != algorithmMaps.end()) ? algorithmMaps.at(alg) : HASH_ALGORITHM_TYPE_UNSUPPORTED;
34 }
35
GetHashArgs(napi_env env,const NFuncArg & funcArg)36 static tuple<bool, unique_ptr<char[]>, HASH_ALGORITHM_TYPE, bool> GetHashArgs(napi_env env, const NFuncArg &funcArg)
37 {
38 bool isPromise = false;
39 auto [resGetFirstArg, path, unused] = NVal(env, funcArg[NARG_POS::FIRST]).ToUTF8String();
40 if (!resGetFirstArg) {
41 HILOGE("Invalid path");
42 NError(EINVAL).ThrowErr(env);
43 return { false, nullptr, HASH_ALGORITHM_TYPE_UNSUPPORTED, isPromise };
44 }
45
46 auto [resGetSecondArg, alg, ignore] = NVal(env, funcArg[NARG_POS::SECOND]).ToUTF8String();
47 if (!resGetSecondArg) {
48 HILOGE("Invalid algorithm");
49 NError(EINVAL).ThrowErr(env);
50 return { false, nullptr, HASH_ALGORITHM_TYPE_UNSUPPORTED, isPromise };
51 }
52
53 HASH_ALGORITHM_TYPE algType = GetHashAlgorithm(alg.get());
54 if (algType == HASH_ALGORITHM_TYPE_UNSUPPORTED) {
55 HILOGE("Invalid algorithm");
56 NError(EINVAL).ThrowErr(env);
57 return { false, nullptr, HASH_ALGORITHM_TYPE_UNSUPPORTED, isPromise };
58 }
59
60 if (funcArg.GetArgc() == NARG_CNT::THREE && !NVal(env, funcArg[NARG_POS::THIRD]).TypeIs(napi_function)) {
61 HILOGE("Invalid callback");
62 NError(EINVAL).ThrowErr(env);
63 return { false, nullptr, HASH_ALGORITHM_TYPE_UNSUPPORTED, isPromise };
64 }
65
66 isPromise = funcArg.GetArgc() == NARG_CNT::TWO;
67 return { true, move(path), algType, isPromise };
68 }
69
Async(napi_env env,napi_callback_info info)70 napi_value Hash::Async(napi_env env, napi_callback_info info)
71 {
72 NFuncArg funcArg(env, info);
73 if (!funcArg.InitArgs(NARG_CNT::TWO, NARG_CNT::THREE)) {
74 HILOGE("Number of arguments unmatched");
75 NError(EINVAL).ThrowErr(env);
76 return nullptr;
77 }
78
79 auto [succ, fpath, algType, isPromise] = GetHashArgs(env, funcArg);
80 if (!succ) {
81 HILOGE("Failed to get hash args");
82 return nullptr;
83 }
84
85 auto arg = make_shared<string>();
86 auto cbExec = [fpath = string(fpath.release()), arg, algType = algType, env = env]() -> NError {
87 int ret = EIO;
88 string &res = *arg;
89 if (algType == HASH_ALGORITHM_TYPE_MD5) {
90 tie(ret, res) = DistributedFS::HashFile::HashWithMD5(fpath);
91 } else if (algType == HASH_ALGORITHM_TYPE_SHA1) {
92 tie(ret, res) = DistributedFS::HashFile::HashWithSHA1(fpath);
93 } else if (algType == HASH_ALGORITHM_TYPE_SHA256) {
94 tie(ret, res) = DistributedFS::HashFile::HashWithSHA256(fpath);
95 }
96 return NError(ret);
97 };
98
99 auto cbComplete = [arg](napi_env env, NError err) -> NVal {
100 if (err) {
101 return { NVal(env, err.GetNapiErr(env)) };
102 }
103
104 return { NVal::CreateUTF8String(env, *arg) };
105 };
106
107 NVal thisVar(env, funcArg.GetThisVar());
108 if (isPromise) {
109 return NAsyncWorkPromise(env, thisVar).Schedule(PROCEDURE_HASH_NAME, cbExec, cbComplete).val_;
110 } else {
111 NVal cb(env, funcArg[NARG_POS::THIRD]);
112 return NAsyncWorkCallback(env, thisVar, cb).Schedule(PROCEDURE_HASH_NAME, cbExec, cbComplete).val_;
113 }
114 }
115
Export()116 bool HashNExporter::Export()
117 {
118 return exports_.AddProp({
119 NVal::DeclareNapiFunction("hash", Hash::Async),
120 });
121 }
122
GetClassName()123 string HashNExporter::GetClassName()
124 {
125 return HashNExporter::className_;
126 }
127
HashNExporter(napi_env env,napi_value exports)128 HashNExporter::HashNExporter(napi_env env, napi_value exports) : NExporter(env, exports) {}
129
130 } // namespace ModuleFileIO
131 } // namespace FileManagement
132 } // namespace OHOS