git / moonbite-core / src/key_io.cpp · raw

// Copyright (c) 2014-2019 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 <key_io.h>#include <base58.h>#include <bech32.h>#include <util/strencodings.h>#include <boost/variant/apply_visitor.hpp>#include <boost/variant/static_visitor.hpp>#include <assert.h>#include <string.h>#include <algorithm>namespace{class DestinationEncoder : public boost::static_visitor<std::string>{private:    const CChainParams& m_params;public:    explicit DestinationEncoder(const CChainParams& params) : m_params(params) {}    std::string operator()(const PKHash& id) const    {        std::vector<unsigned char> data = m_params.Base58Prefix(CChainParams::PUBKEY_ADDRESS);        data.insert(data.end(), id.begin(), id.end());        return EncodeBase58Check(data);    }    std::string operator()(const ScriptHash& id) const    {        std::vector<unsigned char> data = m_params.Base58Prefix(CChainParams::SCRIPT_ADDRESS2);        data.insert(data.end(), id.begin(), id.end());        return EncodeBase58Check(data);    }    std::string operator()(const WitnessV0KeyHash& id) const    {        std::vector<unsigned char> data = {0};        data.reserve(33);        ConvertBits<8, 5, true>([&](unsigned char c) { data.push_back(c); }, id.begin(), id.end());        return bech32::Encode(bech32::Encoding::BECH32, m_params.Bech32HRP(), data);    }    std::string operator()(const WitnessV0ScriptHash& id) const    {        std::vector<unsigned char> data = {0};        data.reserve(53);        ConvertBits<8, 5, true>([&](unsigned char c) { data.push_back(c); }, id.begin(), id.end());        return bech32::Encode(bech32::Encoding::BECH32, m_params.Bech32HRP(), data);    }    std::string operator()(const WitnessUnknown& id) const    {        if (id.version < 1 || id.version > 16 || id.length < 2 || id.length > 40) {            return {};        }        std::vector<unsigned char> data = {(unsigned char)id.version};        data.reserve(1 + (id.length * 8 + 4) / 5);        ConvertBits<8, 5, true>([&](unsigned char c) { data.push_back(c); }, id.program, id.program + id.length);        return bech32::Encode(bech32::Encoding::BECH32M, m_params.Bech32HRP(), data);    }    std::string operator()(const StealthAddress& id) const    {        std::vector<uint8_t> serialized = id.Serialized();        std::vector<uint8_t> converted = {0};        ConvertBits<8, 5, true>([&](unsigned char c) { converted.push_back(c); }, serialized.begin(), serialized.end());        return bech32::Encode(bech32::Encoding::BECH32, m_params.MWEB_HRP(), converted);    }    std::string operator()(const CNoDestination& no) const { return {}; }};CTxDestination DecodeDestination(const std::string& str, const CChainParams& params){    std::vector<unsigned char> data;    uint160 hash;    if (DecodeBase58Check(str, data, 21)) {        // base58-encoded Bitcoin addresses.        // Public-key-hash-addresses have version 0 (or 111 testnet).        // The data vector contains RIPEMD160(SHA256(pubkey)), where pubkey is the serialized public key.        const std::vector<unsigned char>& pubkey_prefix = params.Base58Prefix(CChainParams::PUBKEY_ADDRESS);        if (data.size() == hash.size() + pubkey_prefix.size() && std::equal(pubkey_prefix.begin(), pubkey_prefix.end(), data.begin())) {            std::copy(data.begin() + pubkey_prefix.size(), data.end(), hash.begin());            return PKHash(hash);        }        // Script-hash-addresses have version 5 for 3 prefix (or 196 testnet).        // The data vector contains RIPEMD160(SHA256(cscript)), where cscript is the serialized redemption script.        const std::vector<unsigned char>& script_prefix = params.Base58Prefix(CChainParams::SCRIPT_ADDRESS);        if (data.size() == hash.size() + script_prefix.size() && std::equal(script_prefix.begin(), script_prefix.end(), data.begin())) {            std::copy(data.begin() + script_prefix.size(), data.end(), hash.begin());            return ScriptHash(hash);        }        // Script-hash-addresses have version 5 for M prefix (or 196 testnet).        // The data vector contains RIPEMD160(SHA256(cscript)), where cscript is the serialized redemption script.        const std::vector<unsigned char>& script_prefix2 = params.Base58Prefix(CChainParams::SCRIPT_ADDRESS2);        if (data.size() == hash.size() + script_prefix2.size() && std::equal(script_prefix2.begin(), script_prefix2.end(), data.begin())) {            std::copy(data.begin() + script_prefix2.size(), data.end(), hash.begin());            return ScriptHash(hash);        }            }    data.clear();    const auto dec = bech32::Decode(str);    if ((dec.encoding == bech32::Encoding::BECH32 || dec.encoding == bech32::Encoding::BECH32M) && dec.data.size() > 0 && dec.hrp == params.Bech32HRP()) {        // Bech32 decoding        int version = dec.data[0]; // The first 5 bit symbol is the witness version (0-16)        if (version == 0 && dec.encoding != bech32::Encoding::BECH32) {            return CNoDestination();        }        if (version != 0 && dec.encoding != bech32::Encoding::BECH32M) {            return CNoDestination();        }        // The rest of the symbols are converted witness program bytes.        data.reserve(((dec.data.size() - 1) * 5) / 8);        if (ConvertBits<5, 8, false>([&](unsigned char c) { data.push_back(c); }, dec.data.begin() + 1, dec.data.end())) {            if (version == 0) {                {                    WitnessV0KeyHash keyid;                    if (data.size() == keyid.size()) {                        std::copy(data.begin(), data.end(), keyid.begin());                        return keyid;                    }                }                {                    WitnessV0ScriptHash scriptid;                    if (data.size() == scriptid.size()) {                        std::copy(data.begin(), data.end(), scriptid.begin());                        return scriptid;                    }                }                return CNoDestination();            }            if (version > 16 || data.size() < 2 || data.size() > 40) {                return CNoDestination();            }            WitnessUnknown unk;            unk.version = version;            std::copy(data.begin(), data.end(), unk.program);            unk.length = data.size();            return unk;        }    }    auto decoded = bech32::Decode(str, true);    if (decoded.encoding == bech32::Encoding::BECH32 && decoded.hrp == params.MWEB_HRP()) {        std::vector<uint8_t> converted;        converted.reserve(((decoded.data.size() - 1) * 5) / 8);        if (ConvertBits<5, 8, false>([&](unsigned char c) { converted.push_back(c); }, decoded.data.begin() + 1, decoded.data.end())) {            if (converted.size() == 66) {                return StealthAddress(BigInt<33>(converted.data()), BigInt<33>(converted.data() + 33));            }        }    }    return CNoDestination();}} // namespaceCKey DecodeSecret(const std::string& str){    CKey key;    std::vector<unsigned char> data;    if (DecodeBase58Check(str, data, 34)) {        const std::vector<unsigned char>& privkey_prefix = Params().Base58Prefix(CChainParams::SECRET_KEY);        if ((data.size() == 32 + privkey_prefix.size() || (data.size() == 33 + privkey_prefix.size() && data.back() == 1)) &&            std::equal(privkey_prefix.begin(), privkey_prefix.end(), data.begin())) {            bool compressed = data.size() == 33 + privkey_prefix.size();            key.Set(data.begin() + privkey_prefix.size(), data.begin() + privkey_prefix.size() + 32, compressed);        }    }    if (!data.empty()) {        memory_cleanse(data.data(), data.size());    }    return key;}std::string EncodeSecret(const CKey& key){    assert(key.IsValid());    std::vector<unsigned char> data = Params().Base58Prefix(CChainParams::SECRET_KEY);    data.insert(data.end(), key.begin(), key.end());    if (key.IsCompressed()) {        data.push_back(1);    }    std::string ret = EncodeBase58Check(data);    memory_cleanse(data.data(), data.size());    return ret;}CExtPubKey DecodeExtPubKey(const std::string& str){    CExtPubKey key;    std::vector<unsigned char> data;    if (DecodeBase58Check(str, data, 78)) {        const std::vector<unsigned char>& prefix = Params().Base58Prefix(CChainParams::EXT_PUBLIC_KEY);        if (data.size() == BIP32_EXTKEY_SIZE + prefix.size() && std::equal(prefix.begin(), prefix.end(), data.begin())) {            key.Decode(data.data() + prefix.size());        }    }    return key;}std::string EncodeExtPubKey(const CExtPubKey& key){    std::vector<unsigned char> data = Params().Base58Prefix(CChainParams::EXT_PUBLIC_KEY);    size_t size = data.size();    data.resize(size + BIP32_EXTKEY_SIZE);    key.Encode(data.data() + size);    std::string ret = EncodeBase58Check(data);    return ret;}CExtKey DecodeExtKey(const std::string& str){    CExtKey key;    std::vector<unsigned char> data;    if (DecodeBase58Check(str, data, 78)) {        const std::vector<unsigned char>& prefix = Params().Base58Prefix(CChainParams::EXT_SECRET_KEY);        if (data.size() == BIP32_EXTKEY_SIZE + prefix.size() && std::equal(prefix.begin(), prefix.end(), data.begin())) {            key.Decode(data.data() + prefix.size());        }    }    return key;}std::string EncodeExtKey(const CExtKey& key){    std::vector<unsigned char> data = Params().Base58Prefix(CChainParams::EXT_SECRET_KEY);    size_t size = data.size();    data.resize(size + BIP32_EXTKEY_SIZE);    key.Encode(data.data() + size);    std::string ret = EncodeBase58Check(data);    memory_cleanse(data.data(), data.size());    return ret;}std::string EncodeDestination(const CTxDestination& dest){    return boost::apply_visitor(DestinationEncoder(Params()), dest);}CTxDestination DecodeDestination(const std::string& str){    return DecodeDestination(str, Params());}bool IsValidDestinationString(const std::string& str, const CChainParams& params){    return IsValidDestination(DecodeDestination(str, params));}bool IsValidDestinationString(const std::string& str){    return IsValidDestinationString(str, Params());}