1 /*
2 * Copyright (c) 2022-2023 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 "cminit_fuzzer.h"
17
18 #include "cert_manager_api.h"
19 #include "cm_fuzz_test_common.h"
20 #include "cm_test_common.h"
21
22 using namespace CmFuzzTest;
23 namespace OHOS {
24 static const uint32_t CM_INIT_BLOB_NUM = 2;
25
DoSomethingInterestingWithMyAPI(const uint8_t * data,size_t size)26 bool DoSomethingInterestingWithMyAPI(const uint8_t* data, size_t size)
27 {
28 uint32_t minSize = CM_INIT_BLOB_NUM * sizeof(struct CmBlob) + sizeof(struct CmSignatureSpec);
29 uint8_t *myData = nullptr;
30 if (!CopyMyData(data, size, minSize, &myData)) {
31 return false;
32 }
33
34 uint32_t remainSize = static_cast<uint32_t>(size);
35 uint32_t offset = 0;
36
37 struct CmBlob authUri = { 0, nullptr };
38 if (!GetCmBlobFromBuffer(myData, &remainSize, &offset, &authUri)) {
39 CmFree(myData);
40 return false;
41 }
42
43 if (remainSize < sizeof(struct CmSignatureSpec)) {
44 CmFree(myData);
45 return false;
46 }
47 struct CmSignatureSpec spec;
48 (void)memcpy_s(&spec, sizeof(struct CmSignatureSpec), myData + offset, sizeof(struct CmSignatureSpec));
49 remainSize -= sizeof(struct CmSignatureSpec);
50 offset += sizeof(struct CmSignatureSpec);
51
52 struct CmBlob handle = { 0, nullptr };
53 if (!GetCmBlobFromBuffer(myData, &remainSize, &offset, &handle)) {
54 CmFree(myData);
55 return false;
56 }
57
58 CertmanagerTest::SetATPermission();
59 (void)CmInit(&authUri, &spec, &handle);
60
61 CmFree(myData);
62 return true;
63 }
64 }
65
66 /* Fuzzer entry point */
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)67 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
68 {
69 /* Run your code on data */
70 OHOS::DoSomethingInterestingWithMyAPI(data, size);
71 return 0;
72 }
73
74