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 <chainparams.h>
6 : #include <key.h>
7 : #include <psbt.h>
8 : #include <pubkey.h>
9 : #include <script/keyorigin.h>
10 : #include <script/sign.h>
11 : #include <script/signingprovider.h>
12 : #include <streams.h>
13 : #include <test/fuzz/FuzzedDataProvider.h>
14 : #include <test/fuzz/fuzz.h>
15 : #include <test/fuzz/util.h>
16 : #include <util/chaintype.h>
17 2 : #include <util/translation.h>
18 2 :
19 : #include <cassert>
20 : #include <cstdint>
21 : #include <iostream>
22 : #include <map>
23 : #include <optional>
24 : #include <string>
25 : #include <vector>
26 :
27 2 : void initialize_script_sign()
28 : {
29 0 : ECC_Start();
30 0 : SelectParams(ChainType::REGTEST);
31 0 : }
32 :
33 4 : FUZZ_TARGET(script_sign, .init = initialize_script_sign)
34 : {
35 0 : FuzzedDataProvider fuzzed_data_provider(buffer.data(), buffer.size());
36 0 : const std::vector<uint8_t> key = ConsumeRandomLengthByteVector(fuzzed_data_provider, 128);
37 :
38 : {
39 0 : DataStream stream{ConsumeDataStream(fuzzed_data_provider)};
40 0 : CDataStream random_data_stream{stream, SER_NETWORK, INIT_PROTO_VERSION}; // temporary copy, to be removed along with the version flag SERIALIZE_TRANSACTION_NO_WITNESS
41 0 : std::map<CPubKey, KeyOriginInfo> hd_keypaths;
42 : try {
43 0 : DeserializeHDKeypaths(random_data_stream, key, hd_keypaths);
44 0 : } catch (const std::ios_base::failure&) {
45 0 : }
46 0 : CDataStream serialized{SER_NETWORK, PROTOCOL_VERSION};
47 0 : SerializeHDKeypaths(serialized, hd_keypaths, CompactSizeWriter(fuzzed_data_provider.ConsumeIntegral<uint8_t>()));
48 0 : }
49 :
50 : {
51 0 : std::map<CPubKey, KeyOriginInfo> hd_keypaths;
52 0 : LIMITED_WHILE(fuzzed_data_provider.ConsumeBool(), 10000) {
53 0 : const std::optional<CPubKey> pub_key = ConsumeDeserializable<CPubKey>(fuzzed_data_provider);
54 0 : if (!pub_key) {
55 0 : break;
56 : }
57 0 : const std::optional<KeyOriginInfo> key_origin_info = ConsumeDeserializable<KeyOriginInfo>(fuzzed_data_provider);
58 0 : if (!key_origin_info) {
59 0 : break;
60 : }
61 0 : hd_keypaths[*pub_key] = *key_origin_info;
62 0 : }
63 0 : CDataStream serialized{SER_NETWORK, PROTOCOL_VERSION};
64 : try {
65 0 : SerializeHDKeypaths(serialized, hd_keypaths, CompactSizeWriter(fuzzed_data_provider.ConsumeIntegral<uint8_t>()));
66 0 : } catch (const std::ios_base::failure&) {
67 0 : }
68 0 : std::map<CPubKey, KeyOriginInfo> deserialized_hd_keypaths;
69 : try {
70 0 : DeserializeHDKeypaths(serialized, key, hd_keypaths);
71 0 : } catch (const std::ios_base::failure&) {
72 0 : }
73 0 : assert(hd_keypaths.size() >= deserialized_hd_keypaths.size());
74 2 : }
75 :
76 : {
77 0 : SignatureData signature_data_1{ConsumeScript(fuzzed_data_provider)};
78 0 : SignatureData signature_data_2{ConsumeScript(fuzzed_data_provider)};
79 0 : signature_data_1.MergeSignatureData(signature_data_2);
80 0 : }
81 :
82 0 : FillableSigningProvider provider;
83 0 : CKey k = ConsumePrivateKey(fuzzed_data_provider);
84 0 : if (k.IsValid()) {
85 0 : provider.AddKey(k);
86 0 : }
87 :
88 : {
89 0 : const std::optional<CMutableTransaction> mutable_transaction = ConsumeDeserializable<CMutableTransaction>(fuzzed_data_provider);
90 0 : const std::optional<CTxOut> tx_out = ConsumeDeserializable<CTxOut>(fuzzed_data_provider);
91 0 : const unsigned int n_in = fuzzed_data_provider.ConsumeIntegral<unsigned int>();
92 0 : if (mutable_transaction && tx_out && mutable_transaction->vin.size() > n_in) {
93 0 : SignatureData signature_data_1 = DataFromTransaction(*mutable_transaction, n_in, *tx_out);
94 0 : CTxIn input;
95 0 : UpdateInput(input, signature_data_1);
96 0 : const CScript script = ConsumeScript(fuzzed_data_provider);
97 0 : SignatureData signature_data_2{script};
98 0 : signature_data_1.MergeSignatureData(signature_data_2);
99 0 : }
100 0 : if (mutable_transaction) {
101 0 : CTransaction tx_from{*mutable_transaction};
102 0 : CMutableTransaction tx_to;
103 0 : const std::optional<CMutableTransaction> opt_tx_to = ConsumeDeserializable<CMutableTransaction>(fuzzed_data_provider);
104 0 : if (opt_tx_to) {
105 0 : tx_to = *opt_tx_to;
106 0 : }
107 0 : CMutableTransaction script_tx_to = tx_to;
108 0 : CMutableTransaction sign_transaction_tx_to = tx_to;
109 0 : if (n_in < tx_to.vin.size() && tx_to.vin[n_in].prevout.n < tx_from.vout.size()) {
110 0 : SignatureData empty;
111 0 : (void)SignSignature(provider, tx_from, tx_to, n_in, fuzzed_data_provider.ConsumeIntegral<int>(), empty);
112 0 : }
113 0 : if (n_in < script_tx_to.vin.size()) {
114 0 : SignatureData empty;
115 0 : (void)SignSignature(provider, ConsumeScript(fuzzed_data_provider), script_tx_to, n_in, ConsumeMoney(fuzzed_data_provider), fuzzed_data_provider.ConsumeIntegral<int>(), empty);
116 0 : MutableTransactionSignatureCreator signature_creator{tx_to, n_in, ConsumeMoney(fuzzed_data_provider), fuzzed_data_provider.ConsumeIntegral<int>()};
117 0 : std::vector<unsigned char> vch_sig;
118 0 : CKeyID address;
119 0 : if (fuzzed_data_provider.ConsumeBool()) {
120 0 : if (k.IsValid()) {
121 0 : address = k.GetPubKey().GetID();
122 0 : }
123 0 : } else {
124 0 : address = CKeyID{ConsumeUInt160(fuzzed_data_provider)};
125 : }
126 0 : (void)signature_creator.CreateSig(provider, vch_sig, address, ConsumeScript(fuzzed_data_provider), fuzzed_data_provider.PickValueInArray({SigVersion::BASE, SigVersion::WITNESS_V0}));
127 0 : }
128 0 : std::map<COutPoint, Coin> coins;
129 0 : LIMITED_WHILE(fuzzed_data_provider.ConsumeBool(), 10000) {
130 0 : const std::optional<COutPoint> outpoint = ConsumeDeserializable<COutPoint>(fuzzed_data_provider);
131 0 : if (!outpoint) {
132 0 : break;
133 : }
134 0 : const std::optional<Coin> coin = ConsumeDeserializable<Coin>(fuzzed_data_provider);
135 0 : if (!coin) {
136 0 : break;
137 : }
138 0 : coins[*outpoint] = *coin;
139 0 : }
140 0 : std::map<int, bilingual_str> input_errors;
141 0 : (void)SignTransaction(sign_transaction_tx_to, &provider, coins, fuzzed_data_provider.ConsumeIntegral<int>(), input_errors);
142 0 : }
143 0 : }
144 :
145 : {
146 0 : SignatureData signature_data_1;
147 0 : (void)ProduceSignature(provider, DUMMY_SIGNATURE_CREATOR, ConsumeScript(fuzzed_data_provider), signature_data_1);
148 0 : SignatureData signature_data_2;
149 0 : (void)ProduceSignature(provider, DUMMY_MAXIMUM_SIGNATURE_CREATOR, ConsumeScript(fuzzed_data_provider), signature_data_2);
150 0 : }
151 0 : }
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