64 lines
2.5 KiB
C++
64 lines
2.5 KiB
C++
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/*
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* Copyright (C) 2021 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "fuzzer/FuzzedDataProvider.h"
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#include <inttypes.h>
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#include <keystore/keystore_get.h>
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using namespace std;
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constexpr int32_t kMaxKeySize = 256;
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const string kValidStrKeyPrefix[] = {"USRSKEY_",
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"PLATFORM_VPN_",
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"USRPKEY_",
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"CACERT_",
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"VPN_"
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"USRCERT_",
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"WIFI_"};
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constexpr char kStrGrantKeyPrefix[] = "ks2_keystore-engine_grant_id:";
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constexpr char kStrKeySuffix[] = "LOCKDOWN_VPN";
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constexpr size_t kGrantIdSize = 20;
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extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
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FuzzedDataProvider fdp = FuzzedDataProvider(data, size);
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size_t keyLength = fdp.ConsumeIntegralInRange<size_t>(0, kMaxKeySize);
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bool usePrefix = fdp.ConsumeBool();
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string strKeyPrefix;
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size_t strKeyPrefixLength = 0;
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size_t strKeySuffixLength = min(fdp.remaining_bytes(), keyLength);
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if (usePrefix) {
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strKeyPrefix = fdp.PickValueInArray(kValidStrKeyPrefix);
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strKeyPrefixLength = sizeof(strKeyPrefix);
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strKeySuffixLength =
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(strKeySuffixLength > strKeyPrefixLength) ? strKeySuffixLength - strKeyPrefixLength : 0;
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}
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string strKeySuffix =
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fdp.ConsumeBool() ? string(kStrKeySuffix) : fdp.ConsumeBytesAsString(strKeySuffixLength);
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string strKey;
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strKey = usePrefix ? strKeyPrefix + strKeySuffix : strKeySuffix;
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if (fdp.ConsumeBool()) {
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uint64_t grant = fdp.ConsumeIntegral<uint64_t>();
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char grantId[kGrantIdSize] = "";
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snprintf(grantId, kGrantIdSize, "%" PRIx64, grant);
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strKey = strKey + string(kStrGrantKeyPrefix) + grantId;
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}
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const char* key = strKey.c_str();
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uint8_t* value = nullptr;
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keystore_get(key, strlen(key), &value);
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free(value);
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return 0;
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}
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