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// Copyright (c) 2020-2022 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include <chainparams.h>
#include <chainparamsbase.h>
#include <key.h>
#include <key_io.h>
#include <outputtype.h>
#include <policy/policy.h>
#include <pubkey.h>
#include <rpc/util.h>
#include <script/keyorigin.h>
#include <script/script.h>
#include <script/sign.h>
#include <script/signingprovider.h>
#include <script/standard.h>
#include <streams.h>
#include <test/fuzz/fuzz.h>
#include <util/chaintype.h>
#include <util/strencodings.h>
#include <cassert>
#include <cstdint>
#include <numeric>
#include <string>
#include <vector>
void initialize_key()
{
ECC_Start();
SelectParams(ChainType::REGTEST);
}
FUZZ_TARGET_INIT(key, initialize_key)
{
const CKey key = [&] {
CKey k;
k.Set(buffer.begin(), buffer.end(), true);
return k;
}();
if (!key.IsValid()) {
return;
}
{
assert(key.begin() + key.size() == key.end());
assert(key.IsCompressed());
assert(key.size() == 32);
assert(DecodeSecret(EncodeSecret(key)) == key);
}
{
CKey invalid_key;
assert(!(invalid_key == key));
assert(!invalid_key.IsCompressed());
assert(!invalid_key.IsValid());
assert(invalid_key.size() == 0);
}
{
CKey uncompressed_key;
uncompressed_key.Set(buffer.begin(), buffer.end(), false);
assert(!(uncompressed_key == key));
assert(!uncompressed_key.IsCompressed());
assert(key.size() == 32);
assert(uncompressed_key.begin() + uncompressed_key.size() == uncompressed_key.end());
assert(uncompressed_key.IsValid());
}
{
CKey copied_key;
copied_key.Set(key.begin(), key.end(), key.IsCompressed());
assert(copied_key == key);
}
{
CKey negated_key = key;
negated_key.Negate();
assert(negated_key.IsValid());
assert(!(negated_key == key));
negated_key.Negate();
assert(negated_key == key);
}
const uint256 random_uint256 = Hash(buffer);
{
CKey child_key;
ChainCode child_chaincode;
const bool ok = key.Derive(child_key, child_chaincode, 0, random_uint256);
assert(ok);
assert(child_key.IsValid());
assert(!(child_key == key));
assert(child_chaincode != random_uint256);
}
const CPubKey pubkey = key.GetPubKey();
{
assert(pubkey.size() == 33);
assert(key.VerifyPubKey(pubkey));
assert(pubkey.GetHash() != random_uint256);
assert(pubkey.begin() + pubkey.size() == pubkey.end());
assert(pubkey.data() == pubkey.begin());
assert(pubkey.IsCompressed());
assert(pubkey.IsValid());
assert(pubkey.IsFullyValid());
assert(HexToPubKey(HexStr(pubkey)) == pubkey);
assert(GetAllDestinationsForKey(pubkey).size() == 3);
}
{
DataStream data_stream{};
pubkey.Serialize(data_stream);
CPubKey pubkey_deserialized;
pubkey_deserialized.Unserialize(data_stream);
assert(pubkey_deserialized == pubkey);
}
{
const CScript tx_pubkey_script = GetScriptForRawPubKey(pubkey);
assert(!tx_pubkey_script.IsPayToScriptHash());
assert(!tx_pubkey_script.IsPayToWitnessScriptHash());
assert(!tx_pubkey_script.IsPushOnly());
assert(!tx_pubkey_script.IsUnspendable());
assert(tx_pubkey_script.HasValidOps());
assert(tx_pubkey_script.size() == 35);
const CScript tx_multisig_script = GetScriptForMultisig(1, {pubkey});
assert(!tx_multisig_script.IsPayToScriptHash());
assert(!tx_multisig_script.IsPayToWitnessScriptHash());
assert(!tx_multisig_script.IsPushOnly());
assert(!tx_multisig_script.IsUnspendable());
assert(tx_multisig_script.HasValidOps());
assert(tx_multisig_script.size() == 37);
FillableSigningProvider fillable_signing_provider;
assert(!IsSegWitOutput(fillable_signing_provider, tx_pubkey_script));
assert(!IsSegWitOutput(fillable_signing_provider, tx_multisig_script));
assert(fillable_signing_provider.GetKeys().size() == 0);
assert(!fillable_signing_provider.HaveKey(pubkey.GetID()));
const bool ok_add_key = fillable_signing_provider.AddKey(key);
assert(ok_add_key);
assert(fillable_signing_provider.HaveKey(pubkey.GetID()));
FillableSigningProvider fillable_signing_provider_pub;
assert(!fillable_signing_provider_pub.HaveKey(pubkey.GetID()));
const bool ok_add_key_pubkey = fillable_signing_provider_pub.AddKeyPubKey(key, pubkey);
assert(ok_add_key_pubkey);
assert(fillable_signing_provider_pub.HaveKey(pubkey.GetID()));
TxoutType which_type_tx_pubkey;
const bool is_standard_tx_pubkey = IsStandard(tx_pubkey_script, std::nullopt, which_type_tx_pubkey);
assert(is_standard_tx_pubkey);
assert(which_type_tx_pubkey == TxoutType::PUBKEY);
TxoutType which_type_tx_multisig;
const bool is_standard_tx_multisig = IsStandard(tx_multisig_script, std::nullopt, which_type_tx_multisig);
assert(is_standard_tx_multisig);
assert(which_type_tx_multisig == TxoutType::MULTISIG);
std::vector<std::vector<unsigned char>> v_solutions_ret_tx_pubkey;
const TxoutType outtype_tx_pubkey = Solver(tx_pubkey_script, v_solutions_ret_tx_pubkey);
assert(outtype_tx_pubkey == TxoutType::PUBKEY);
assert(v_solutions_ret_tx_pubkey.size() == 1);
assert(v_solutions_ret_tx_pubkey[0].size() == 33);
std::vector<std::vector<unsigned char>> v_solutions_ret_tx_multisig;
const TxoutType outtype_tx_multisig = Solver(tx_multisig_script, v_solutions_ret_tx_multisig);
assert(outtype_tx_multisig == TxoutType::MULTISIG);
assert(v_solutions_ret_tx_multisig.size() == 3);
assert(v_solutions_ret_tx_multisig[0].size() == 1);
assert(v_solutions_ret_tx_multisig[1].size() == 33);
assert(v_solutions_ret_tx_multisig[2].size() == 1);
OutputType output_type{};
const CTxDestination tx_destination = GetDestinationForKey(pubkey, output_type);
assert(output_type == OutputType::LEGACY);
assert(IsValidDestination(tx_destination));
assert(CTxDestination{PKHash{pubkey}} == tx_destination);
const CScript script_for_destination = GetScriptForDestination(tx_destination);
assert(script_for_destination.size() == 25);
const std::string destination_address = EncodeDestination(tx_destination);
assert(DecodeDestination(destination_address) == tx_destination);
const CPubKey pubkey_from_address_string = AddrToPubKey(fillable_signing_provider, destination_address);
assert(pubkey_from_address_string == pubkey);
CKeyID key_id = pubkey.GetID();
assert(!key_id.IsNull());
assert(key_id == CKeyID{key_id});
assert(key_id == GetKeyForDestination(fillable_signing_provider, tx_destination));
CPubKey pubkey_out;
const bool ok_get_pubkey = fillable_signing_provider.GetPubKey(key_id, pubkey_out);
assert(ok_get_pubkey);
CKey key_out;
const bool ok_get_key = fillable_signing_provider.GetKey(key_id, key_out);
assert(ok_get_key);
assert(fillable_signing_provider.GetKeys().size() == 1);
assert(fillable_signing_provider.HaveKey(key_id));
KeyOriginInfo key_origin_info;
const bool ok_get_key_origin = fillable_signing_provider.GetKeyOrigin(key_id, key_origin_info);
assert(!ok_get_key_origin);
}
{
const std::vector<unsigned char> vch_pubkey{pubkey.begin(), pubkey.end()};
assert(CPubKey::ValidSize(vch_pubkey));
assert(!CPubKey::ValidSize({pubkey.begin(), pubkey.begin() + pubkey.size() - 1}));
const CPubKey pubkey_ctor_1{vch_pubkey};
assert(pubkey == pubkey_ctor_1);
const CPubKey pubkey_ctor_2{vch_pubkey.begin(), vch_pubkey.end()};
assert(pubkey == pubkey_ctor_2);
CPubKey pubkey_set;
pubkey_set.Set(vch_pubkey.begin(), vch_pubkey.end());
assert(pubkey == pubkey_set);
}
{
const CPubKey invalid_pubkey{};
assert(!invalid_pubkey.IsValid());
assert(!invalid_pubkey.IsFullyValid());
assert(!(pubkey == invalid_pubkey));
assert(pubkey != invalid_pubkey);
assert(pubkey < invalid_pubkey);
}
{
// Cover CPubKey's operator[](unsigned int pos)
unsigned int sum = 0;
for (size_t i = 0; i < pubkey.size(); ++i) {
sum += pubkey[i];
}
assert(std::accumulate(pubkey.begin(), pubkey.end(), 0U) == sum);
}
{
CPubKey decompressed_pubkey = pubkey;
assert(decompressed_pubkey.IsCompressed());
const bool ok = decompressed_pubkey.Decompress();
assert(ok);
assert(!decompressed_pubkey.IsCompressed());
assert(decompressed_pubkey.size() == 65);
}
{
std::vector<unsigned char> vch_sig;
const bool ok = key.Sign(random_uint256, vch_sig, false);
assert(ok);
assert(pubkey.Verify(random_uint256, vch_sig));
assert(CPubKey::CheckLowS(vch_sig));
const std::vector<unsigned char> vch_invalid_sig{vch_sig.begin(), vch_sig.begin() + vch_sig.size() - 1};
assert(!pubkey.Verify(random_uint256, vch_invalid_sig));
assert(!CPubKey::CheckLowS(vch_invalid_sig));
}
{
std::vector<unsigned char> vch_compact_sig;
const bool ok_sign_compact = key.SignCompact(random_uint256, vch_compact_sig);
assert(ok_sign_compact);
CPubKey recover_pubkey;
const bool ok_recover_compact = recover_pubkey.RecoverCompact(random_uint256, vch_compact_sig);
assert(ok_recover_compact);
assert(recover_pubkey == pubkey);
}
{
CPubKey child_pubkey;
ChainCode child_chaincode;
const bool ok = pubkey.Derive(child_pubkey, child_chaincode, 0, random_uint256);
assert(ok);
assert(child_pubkey != pubkey);
assert(child_pubkey.IsCompressed());
assert(child_pubkey.IsFullyValid());
assert(child_pubkey.IsValid());
assert(child_pubkey.size() == 33);
assert(child_chaincode != random_uint256);
}
const CPrivKey priv_key = key.GetPrivKey();
{
for (const bool skip_check : {true, false}) {
CKey loaded_key;
const bool ok = loaded_key.Load(priv_key, pubkey, skip_check);
assert(ok);
assert(key == loaded_key);
}
}
}
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