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-rw-r--r--src/key_io.cpp223
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diff --git a/src/key_io.cpp b/src/key_io.cpp
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+// Copyright (c) 2014-2016 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 <script/script.h>
+#include <utilstrencodings.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:
+ 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
+
+CKey DecodeSecret(const std::string& str)
+{
+ CKey key;
+ std::vector<unsigned char> data;
+ if (DecodeBase58Check(str, data)) {
+ 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);
+ }
+ }
+ 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)) {
+ 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)) {
+ 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());
+}