Branch data Line data Source code
1 : : // Copyright (c) 2020-2021 The Bitcoin Core developers
2 : : // Distributed under the MIT software license, see the accompanying
3 : : // file COPYING or http://www.opensource.org/licenses/mit-license.php.
4 : :
5 : : #include <crypto/aes.h>
6 : : #include <test/fuzz/FuzzedDataProvider.h>
7 : : #include <test/fuzz/fuzz.h>
8 : : #include <test/fuzz/util.h>
9 : :
10 : : #include <cassert>
11 : : #include <cstdint>
12 : : #include <vector>
13 : :
14 [ # # ]: 0 : FUZZ_TARGET(crypto_aes256cbc)
15 : : {
16 : 0 : FuzzedDataProvider fuzzed_data_provider{buffer.data(), buffer.size()};
17 : 0 : const std::vector<uint8_t> key = ConsumeFixedLengthByteVector(fuzzed_data_provider, AES256_KEYSIZE);
18 : 0 : const std::vector<uint8_t> iv = ConsumeFixedLengthByteVector(fuzzed_data_provider, AES_BLOCKSIZE);
19 : 0 : const bool pad = fuzzed_data_provider.ConsumeBool();
20 : :
21 [ # # ]: 0 : AES256CBCEncrypt encrypt{key.data(), iv.data(), pad};
22 [ # # ]: 0 : AES256CBCDecrypt decrypt{key.data(), iv.data(), pad};
23 : :
24 [ # # # # ]: 0 : LIMITED_WHILE(fuzzed_data_provider.ConsumeBool(), 10000) {
25 : 0 : const std::vector<uint8_t> plaintext = ConsumeRandomLengthByteVector(fuzzed_data_provider);
26 [ # # ]: 0 : std::vector<uint8_t> ciphertext(plaintext.size() + AES_BLOCKSIZE);
27 [ # # ]: 0 : const int encrypt_ret = encrypt.Encrypt(plaintext.data(), plaintext.size(), ciphertext.data());
28 [ # # ]: 0 : ciphertext.resize(encrypt_ret);
29 [ # # ]: 0 : std::vector<uint8_t> decrypted_plaintext(ciphertext.size());
30 [ # # ]: 0 : const int decrypt_ret = decrypt.Decrypt(ciphertext.data(), ciphertext.size(), decrypted_plaintext.data());
31 [ # # ]: 0 : decrypted_plaintext.resize(decrypt_ret);
32 [ # # # # : 0 : assert(decrypted_plaintext == plaintext || (!pad && plaintext.size() % AES_BLOCKSIZE != 0 && encrypt_ret == 0 && decrypt_ret == 0));
# # # # ]
33 : 0 : }
34 : 0 : }
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