diff options
Diffstat (limited to 'src/base58.cpp')
| -rw-r--r-- | src/base58.cpp | 257 |
1 files changed, 21 insertions, 236 deletions
diff --git a/src/base58.cpp b/src/base58.cpp index 499afbe382..feec2d4e05 100644 --- a/src/base58.cpp +++ b/src/base58.cpp @@ -4,22 +4,32 @@ #include <base58.h> -#include <bech32.h> #include <hash.h> -#include <script/script.h> #include <uint256.h> -#include <utilstrencodings.h> -#include <boost/variant/apply_visitor.hpp> -#include <boost/variant/static_visitor.hpp> - -#include <algorithm> #include <assert.h> #include <string.h> - /** All alphanumeric characters except for "0", "I", "O", and "l" */ static const char* pszBase58 = "123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz"; +static const int8_t mapBase58[256] = { + -1,-1,-1,-1,-1,-1,-1,-1, -1,-1,-1,-1,-1,-1,-1,-1, + -1,-1,-1,-1,-1,-1,-1,-1, -1,-1,-1,-1,-1,-1,-1,-1, + -1,-1,-1,-1,-1,-1,-1,-1, -1,-1,-1,-1,-1,-1,-1,-1, + -1, 0, 1, 2, 3, 4, 5, 6, 7, 8,-1,-1,-1,-1,-1,-1, + -1, 9,10,11,12,13,14,15, 16,-1,17,18,19,20,21,-1, + 22,23,24,25,26,27,28,29, 30,31,32,-1,-1,-1,-1,-1, + -1,33,34,35,36,37,38,39, 40,41,42,43,-1,44,45,46, + 47,48,49,50,51,52,53,54, 55,56,57,-1,-1,-1,-1,-1, + -1,-1,-1,-1,-1,-1,-1,-1, -1,-1,-1,-1,-1,-1,-1,-1, + -1,-1,-1,-1,-1,-1,-1,-1, -1,-1,-1,-1,-1,-1,-1,-1, + -1,-1,-1,-1,-1,-1,-1,-1, -1,-1,-1,-1,-1,-1,-1,-1, + -1,-1,-1,-1,-1,-1,-1,-1, -1,-1,-1,-1,-1,-1,-1,-1, + -1,-1,-1,-1,-1,-1,-1,-1, -1,-1,-1,-1,-1,-1,-1,-1, + -1,-1,-1,-1,-1,-1,-1,-1, -1,-1,-1,-1,-1,-1,-1,-1, + -1,-1,-1,-1,-1,-1,-1,-1, -1,-1,-1,-1,-1,-1,-1,-1, + -1,-1,-1,-1,-1,-1,-1,-1, -1,-1,-1,-1,-1,-1,-1,-1, +}; bool DecodeBase58(const char* psz, std::vector<unsigned char>& vch) { @@ -37,13 +47,12 @@ bool DecodeBase58(const char* psz, std::vector<unsigned char>& vch) int size = strlen(psz) * 733 /1000 + 1; // log(58) / log(256), rounded up. std::vector<unsigned char> b256(size); // Process the characters. + static_assert(sizeof(mapBase58)/sizeof(mapBase58[0]) == 256, "mapBase58.size() should be 256"); // guarantee not out of range while (*psz && !isspace(*psz)) { // Decode base58 character - const char* ch = strchr(pszBase58, *psz); - if (ch == nullptr) + int carry = mapBase58[(uint8_t)*psz]; + if (carry == -1) // Invalid b58 character return false; - // Apply "b256 = b256 * 58 + ch". - int carry = ch - pszBase58; int i = 0; for (std::vector<unsigned char>::reverse_iterator it = b256.rbegin(); (carry != 0 || i < length) && (it != b256.rend()); ++it, ++i) { carry += 58 * (*it); @@ -151,227 +160,3 @@ bool DecodeBase58Check(const std::string& str, std::vector<unsigned char>& vchRe { return DecodeBase58Check(str.c_str(), vchRet); } - -CBase58Data::CBase58Data() -{ - vchVersion.clear(); - vchData.clear(); -} - -void CBase58Data::SetData(const std::vector<unsigned char>& vchVersionIn, const void* pdata, size_t nSize) -{ - vchVersion = vchVersionIn; - vchData.resize(nSize); - if (!vchData.empty()) - memcpy(vchData.data(), pdata, nSize); -} - -void CBase58Data::SetData(const std::vector<unsigned char>& vchVersionIn, const unsigned char* pbegin, const unsigned char* pend) -{ - SetData(vchVersionIn, (void*)pbegin, pend - pbegin); -} - -bool CBase58Data::SetString(const char* psz, unsigned int nVersionBytes) -{ - std::vector<unsigned char> vchTemp; - bool rc58 = DecodeBase58Check(psz, vchTemp); - if ((!rc58) || (vchTemp.size() < nVersionBytes)) { - vchData.clear(); - vchVersion.clear(); - return false; - } - vchVersion.assign(vchTemp.begin(), vchTemp.begin() + nVersionBytes); - vchData.resize(vchTemp.size() - nVersionBytes); - if (!vchData.empty()) - memcpy(vchData.data(), vchTemp.data() + nVersionBytes, vchData.size()); - memory_cleanse(vchTemp.data(), vchTemp.size()); - return true; -} - -bool CBase58Data::SetString(const std::string& str) -{ - return SetString(str.c_str()); -} - -std::string CBase58Data::ToString() const -{ - std::vector<unsigned char> vch = vchVersion; - vch.insert(vch.end(), vchData.begin(), vchData.end()); - return EncodeBase58Check(vch); -} - -int CBase58Data::CompareTo(const CBase58Data& b58) const -{ - if (vchVersion < b58.vchVersion) - return -1; - if (vchVersion > b58.vchVersion) - return 1; - if (vchData < b58.vchData) - return -1; - if (vchData > b58.vchData) - return 1; - return 0; -} - -namespace -{ -class DestinationEncoder : public boost::static_visitor<std::string> -{ -private: - const CChainParams& m_params; - -public: - DestinationEncoder(const CChainParams& params) : m_params(params) {} - - std::string operator()(const CKeyID& 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 CScriptID& id) const - { - std::vector<unsigned char> data = m_params.Base58Prefix(CChainParams::SCRIPT_ADDRESS); - data.insert(data.end(), id.begin(), id.end()); - return EncodeBase58Check(data); - } - - std::string operator()(const WitnessV0KeyHash& id) const - { - std::vector<unsigned char> data = {0}; - ConvertBits<8, 5, true>(data, id.begin(), id.end()); - return bech32::Encode(m_params.Bech32HRP(), data); - } - - std::string operator()(const WitnessV0ScriptHash& id) const - { - std::vector<unsigned char> data = {0}; - ConvertBits<8, 5, true>(data, id.begin(), id.end()); - return bech32::Encode(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}; - ConvertBits<8, 5, true>(data, id.program, id.program + id.length); - return bech32::Encode(m_params.Bech32HRP(), data); - } - - 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)) { - // 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 CKeyID(hash); - } - // Script-hash-addresses have version 5 (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 CScriptID(hash); - } - } - data.clear(); - auto bech = bech32::Decode(str); - if (bech.second.size() > 0 && bech.first == params.Bech32HRP()) { - // Bech32 decoding - int version = bech.second[0]; // The first 5 bit symbol is the witness version (0-16) - // The rest of the symbols are converted witness program bytes. - if (ConvertBits<5, 8, false>(data, bech.second.begin() + 1, bech.second.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; - } - } - return CNoDestination(); -} -} // namespace - -void CBitcoinSecret::SetKey(const CKey& vchSecret) -{ - assert(vchSecret.IsValid()); - SetData(Params().Base58Prefix(CChainParams::SECRET_KEY), vchSecret.begin(), vchSecret.size()); - if (vchSecret.IsCompressed()) - vchData.push_back(1); -} - -CKey CBitcoinSecret::GetKey() -{ - CKey ret; - assert(vchData.size() >= 32); - ret.Set(vchData.begin(), vchData.begin() + 32, vchData.size() > 32 && vchData[32] == 1); - return ret; -} - -bool CBitcoinSecret::IsValid() const -{ - bool fExpectedFormat = vchData.size() == 32 || (vchData.size() == 33 && vchData[32] == 1); - bool fCorrectVersion = vchVersion == Params().Base58Prefix(CChainParams::SECRET_KEY); - return fExpectedFormat && fCorrectVersion; -} - -bool CBitcoinSecret::SetString(const char* pszSecret) -{ - return CBase58Data::SetString(pszSecret) && IsValid(); -} - -bool CBitcoinSecret::SetString(const std::string& strSecret) -{ - return SetString(strSecret.c_str()); -} - -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()); -} |