1 /* 2 * Copyright (C) 2021 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 #ifndef KEYSTORECOMMON_H 17 #define KEYSTORECOMMON_H 18 19 #include <android/security/keystore/KeyAttestationPackageInfo.h> 20 #include <android/security/keystore/Signature.h> 21 #include <binder/Parcel.h> 22 #include <binder/Parcelable.h> 23 #include <vector> 24 25 #include "fuzzer/FuzzedDataProvider.h" 26 27 using namespace android; 28 using namespace std; 29 using ::android::security::keystore::KeyAttestationPackageInfo; 30 using ::android::security::keystore::Signature; 31 32 constexpr size_t kSignatureSizeMin = 1; 33 constexpr size_t kSignatureSizeMax = 1000; 34 constexpr size_t kRandomStringLength = 256; 35 constexpr size_t kSignatureVectorSizeMin = 1; 36 constexpr size_t kSignatureVectorSizeMax = 1000; 37 38 struct PackageInfoData { 39 string packageName; 40 int64_t versionCode; 41 std::shared_ptr<std::vector<Signature>> sharedSignaturesVector; 42 }; 43 invokeReadWriteParcel(Parcelable * obj)44inline void invokeReadWriteParcel(Parcelable* obj) { 45 Parcel parcel; 46 obj->writeToParcel(&parcel); 47 parcel.setDataPosition(0); 48 obj->readFromParcel(&parcel); 49 } 50 initSignatureData(FuzzedDataProvider * fdp)51inline vector<uint8_t> initSignatureData(FuzzedDataProvider* fdp) { 52 size_t signatureSize = fdp->ConsumeIntegralInRange(kSignatureSizeMin, kSignatureSizeMax); 53 vector<uint8_t> signatureData = fdp->ConsumeBytes<uint8_t>(signatureSize); 54 return signatureData; 55 } 56 initPackageInfoData(FuzzedDataProvider * fdp)57inline PackageInfoData initPackageInfoData(FuzzedDataProvider* fdp) { 58 PackageInfoData packageInfoData; 59 packageInfoData.packageName = fdp->ConsumeRandomLengthString(kRandomStringLength); 60 packageInfoData.versionCode = fdp->ConsumeIntegral<int64_t>(); 61 size_t signatureVectorSize = 62 fdp->ConsumeIntegralInRange(kSignatureVectorSizeMin, kSignatureVectorSizeMax); 63 std::vector<Signature> signatureVector; 64 for (size_t size = 0; size < signatureVectorSize; ++size) { 65 bool shouldUseParameterizedConstructor = fdp->ConsumeBool(); 66 if (shouldUseParameterizedConstructor) { 67 vector<uint8_t> signatureData = initSignatureData(fdp); 68 auto sign = Signature(); 69 sign.data = signatureData; 70 signatureVector.push_back(std::move(sign)); 71 } else { 72 signatureVector.push_back(Signature()); 73 } 74 } 75 packageInfoData.sharedSignaturesVector = 76 make_shared<std::vector<Signature>>(std::move(signatureVector)); 77 return packageInfoData; 78 } 79 #endif // KEYSTORECOMMON_H 80