LCOV - code coverage report
Current view: top level - src - key_io.cpp (source / functions) Hit Total Coverage
Test: fuzz_coverage.info Lines: 0 195 0.0 %
Date: 2023-11-12 01:39:15 Functions: 0 26 0.0 %
Branches: 0 356 0.0 %

           Branch data     Line data    Source code
       1                 :            : // Copyright (c) 2014-2021 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 <key_io.h>
       6                 :            : 
       7                 :            : #include <base58.h>
       8                 :            : #include <bech32.h>
       9                 :            : #include <script/interpreter.h>
      10                 :            : #include <script/solver.h>
      11                 :            : #include <tinyformat.h>
      12                 :            : #include <util/strencodings.h>
      13                 :            : 
      14                 :            : #include <algorithm>
      15                 :            : #include <assert.h>
      16                 :            : #include <string.h>
      17                 :            : 
      18                 :            : /// Maximum witness length for Bech32 addresses.
      19                 :            : static constexpr std::size_t BECH32_WITNESS_PROG_MAX_LEN = 40;
      20                 :            : 
      21                 :            : namespace {
      22                 :            : class DestinationEncoder
      23                 :            : {
      24                 :            : private:
      25                 :            :     const CChainParams& m_params;
      26                 :            : 
      27                 :            : public:
      28                 :          0 :     explicit DestinationEncoder(const CChainParams& params) : m_params(params) {}
      29                 :            : 
      30                 :          0 :     std::string operator()(const PKHash& id) const
      31                 :            :     {
      32                 :          0 :         std::vector<unsigned char> data = m_params.Base58Prefix(CChainParams::PUBKEY_ADDRESS);
      33 [ #  # ][ #  # ]:          0 :         data.insert(data.end(), id.begin(), id.end());
                 [ #  # ]
      34 [ #  # ][ #  # ]:          0 :         return EncodeBase58Check(data);
      35                 :          0 :     }
      36                 :            : 
      37                 :          0 :     std::string operator()(const ScriptHash& id) const
      38                 :            :     {
      39                 :          0 :         std::vector<unsigned char> data = m_params.Base58Prefix(CChainParams::SCRIPT_ADDRESS);
      40 [ #  # ][ #  # ]:          0 :         data.insert(data.end(), id.begin(), id.end());
                 [ #  # ]
      41 [ #  # ][ #  # ]:          0 :         return EncodeBase58Check(data);
      42                 :          0 :     }
      43                 :            : 
      44                 :          0 :     std::string operator()(const WitnessV0KeyHash& id) const
      45                 :            :     {
      46         [ #  # ]:          0 :         std::vector<unsigned char> data = {0};
      47         [ #  # ]:          0 :         data.reserve(33);
      48 [ #  # ][ #  # ]:          0 :         ConvertBits<8, 5, true>([&](unsigned char c) { data.push_back(c); }, id.begin(), id.end());
                 [ #  # ]
      49         [ #  # ]:          0 :         return bech32::Encode(bech32::Encoding::BECH32, m_params.Bech32HRP(), data);
      50                 :          0 :     }
      51                 :            : 
      52                 :          0 :     std::string operator()(const WitnessV0ScriptHash& id) const
      53                 :            :     {
      54         [ #  # ]:          0 :         std::vector<unsigned char> data = {0};
      55         [ #  # ]:          0 :         data.reserve(53);
      56 [ #  # ][ #  # ]:          0 :         ConvertBits<8, 5, true>([&](unsigned char c) { data.push_back(c); }, id.begin(), id.end());
                 [ #  # ]
      57 [ #  # ][ #  # ]:          0 :         return bech32::Encode(bech32::Encoding::BECH32, m_params.Bech32HRP(), data);
      58                 :          0 :     }
      59                 :            : 
      60                 :          0 :     std::string operator()(const WitnessV1Taproot& tap) const
      61                 :            :     {
      62         [ #  # ]:          0 :         std::vector<unsigned char> data = {1};
      63         [ #  # ]:          0 :         data.reserve(53);
      64 [ #  # ][ #  # ]:          0 :         ConvertBits<8, 5, true>([&](unsigned char c) { data.push_back(c); }, tap.begin(), tap.end());
                 [ #  # ]
      65         [ #  # ]:          0 :         return bech32::Encode(bech32::Encoding::BECH32M, m_params.Bech32HRP(), data);
      66                 :          0 :     }
      67                 :            : 
      68                 :          0 :     std::string operator()(const WitnessUnknown& id) const
      69                 :            :     {
      70                 :          0 :         const std::vector<unsigned char>& program = id.GetWitnessProgram();
      71 [ #  # ][ #  # ]:          0 :         if (id.GetWitnessVersion() < 1 || id.GetWitnessVersion() > 16 || program.size() < 2 || program.size() > 40) {
         [ #  # ][ #  # ]
      72                 :          0 :             return {};
      73                 :            :         }
      74         [ #  # ]:          0 :         std::vector<unsigned char> data = {(unsigned char)id.GetWitnessVersion()};
      75         [ #  # ]:          0 :         data.reserve(1 + (program.size() * 8 + 4) / 5);
      76         [ #  # ]:          0 :         ConvertBits<8, 5, true>([&](unsigned char c) { data.push_back(c); }, program.begin(), program.end());
      77         [ #  # ]:          0 :         return bech32::Encode(bech32::Encoding::BECH32M, m_params.Bech32HRP(), data);
      78                 :          0 :     }
      79                 :            : 
      80                 :          0 :     std::string operator()(const CNoDestination& no) const { return {}; }
      81                 :          0 :     std::string operator()(const PubKeyDestination& pk) const { return {}; }
      82                 :            : };
      83                 :            : 
      84                 :          0 : CTxDestination DecodeDestination(const std::string& str, const CChainParams& params, std::string& error_str, std::vector<int>* error_locations)
      85                 :            : {
      86                 :          0 :     std::vector<unsigned char> data;
      87         [ #  # ]:          0 :     uint160 hash;
      88         [ #  # ]:          0 :     error_str = "";
      89                 :            : 
      90                 :            :     // Note this will be false if it is a valid Bech32 address for a different network
      91 [ #  # ][ #  # ]:          0 :     bool is_bech32 = (ToLower(str.substr(0, params.Bech32HRP().size())) == params.Bech32HRP());
      92                 :            : 
      93 [ #  # ][ #  # ]:          0 :     if (!is_bech32 && DecodeBase58Check(str, data, 21)) {
                 [ #  # ]
      94                 :            :         // base58-encoded Bitcoin addresses.
      95                 :            :         // Public-key-hash-addresses have version 0 (or 111 testnet).
      96                 :            :         // The data vector contains RIPEMD160(SHA256(pubkey)), where pubkey is the serialized public key.
      97                 :          0 :         const std::vector<unsigned char>& pubkey_prefix = params.Base58Prefix(CChainParams::PUBKEY_ADDRESS);
      98 [ #  # ][ #  # ]:          0 :         if (data.size() == hash.size() + pubkey_prefix.size() && std::equal(pubkey_prefix.begin(), pubkey_prefix.end(), data.begin())) {
         [ #  # ][ #  # ]
      99 [ #  # ][ #  # ]:          0 :             std::copy(data.begin() + pubkey_prefix.size(), data.end(), hash.begin());
     100         [ #  # ]:          0 :             return PKHash(hash);
     101                 :            :         }
     102                 :            :         // Script-hash-addresses have version 5 (or 196 testnet).
     103                 :            :         // The data vector contains RIPEMD160(SHA256(cscript)), where cscript is the serialized redemption script.
     104                 :          0 :         const std::vector<unsigned char>& script_prefix = params.Base58Prefix(CChainParams::SCRIPT_ADDRESS);
     105 [ #  # ][ #  # ]:          0 :         if (data.size() == hash.size() + script_prefix.size() && std::equal(script_prefix.begin(), script_prefix.end(), data.begin())) {
         [ #  # ][ #  # ]
     106 [ #  # ][ #  # ]:          0 :             std::copy(data.begin() + script_prefix.size(), data.end(), hash.begin());
     107         [ #  # ]:          0 :             return ScriptHash(hash);
     108                 :            :         }
     109                 :            : 
     110                 :            :         // If the prefix of data matches either the script or pubkey prefix, the length must have been wrong
     111         [ #  # ]:          0 :         if ((data.size() >= script_prefix.size() &&
     112         [ #  # ]:          0 :                 std::equal(script_prefix.begin(), script_prefix.end(), data.begin())) ||
     113         [ #  # ]:          0 :             (data.size() >= pubkey_prefix.size() &&
     114         [ #  # ]:          0 :                 std::equal(pubkey_prefix.begin(), pubkey_prefix.end(), data.begin()))) {
     115         [ #  # ]:          0 :             error_str = "Invalid length for Base58 address (P2PKH or P2SH)";
     116                 :          0 :         } else {
     117         [ #  # ]:          0 :             error_str = "Invalid or unsupported Base58-encoded address.";
     118                 :            :         }
     119         [ #  # ]:          0 :         return CNoDestination();
     120         [ #  # ]:          0 :     } else if (!is_bech32) {
     121                 :            :         // Try Base58 decoding without the checksum, using a much larger max length
     122 [ #  # ][ #  # ]:          0 :         if (!DecodeBase58(str, data, 100)) {
     123         [ #  # ]:          0 :             error_str = "Invalid or unsupported Segwit (Bech32) or Base58 encoding.";
     124                 :          0 :         } else {
     125         [ #  # ]:          0 :             error_str = "Invalid checksum or length of Base58 address (P2PKH or P2SH)";
     126                 :            :         }
     127         [ #  # ]:          0 :         return CNoDestination();
     128                 :            :     }
     129                 :            : 
     130                 :          0 :     data.clear();
     131         [ #  # ]:          0 :     const auto dec = bech32::Decode(str);
     132 [ #  # ][ #  # ]:          0 :     if (dec.encoding == bech32::Encoding::BECH32 || dec.encoding == bech32::Encoding::BECH32M) {
     133         [ #  # ]:          0 :         if (dec.data.empty()) {
     134         [ #  # ]:          0 :             error_str = "Empty Bech32 data section";
     135         [ #  # ]:          0 :             return CNoDestination();
     136                 :            :         }
     137                 :            :         // Bech32 decoding
     138         [ #  # ]:          0 :         if (dec.hrp != params.Bech32HRP()) {
     139         [ #  # ]:          0 :             error_str = strprintf("Invalid or unsupported prefix for Segwit (Bech32) address (expected %s, got %s).", params.Bech32HRP(), dec.hrp);
     140         [ #  # ]:          0 :             return CNoDestination();
     141                 :            :         }
     142                 :          0 :         int version = dec.data[0]; // The first 5 bit symbol is the witness version (0-16)
     143 [ #  # ][ #  # ]:          0 :         if (version == 0 && dec.encoding != bech32::Encoding::BECH32) {
     144         [ #  # ]:          0 :             error_str = "Version 0 witness address must use Bech32 checksum";
     145         [ #  # ]:          0 :             return CNoDestination();
     146                 :            :         }
     147 [ #  # ][ #  # ]:          0 :         if (version != 0 && dec.encoding != bech32::Encoding::BECH32M) {
     148         [ #  # ]:          0 :             error_str = "Version 1+ witness address must use Bech32m checksum";
     149         [ #  # ]:          0 :             return CNoDestination();
     150                 :            :         }
     151                 :            :         // The rest of the symbols are converted witness program bytes.
     152         [ #  # ]:          0 :         data.reserve(((dec.data.size() - 1) * 5) / 8);
     153 [ #  # ][ #  # ]:          0 :         if (ConvertBits<5, 8, false>([&](unsigned char c) { data.push_back(c); }, dec.data.begin() + 1, dec.data.end())) {
     154                 :            : 
     155                 :          0 :             std::string_view byte_str{data.size() == 1 ? "byte" : "bytes"};
     156                 :            : 
     157         [ #  # ]:          0 :             if (version == 0) {
     158                 :            :                 {
     159         [ #  # ]:          0 :                     WitnessV0KeyHash keyid;
     160 [ #  # ][ #  # ]:          0 :                     if (data.size() == keyid.size()) {
     161 [ #  # ][ #  # ]:          0 :                         std::copy(data.begin(), data.end(), keyid.begin());
     162                 :          0 :                         return keyid;
     163                 :            :                     }
     164                 :            :                 }
     165                 :            :                 {
     166         [ #  # ]:          0 :                     WitnessV0ScriptHash scriptid;
     167 [ #  # ][ #  # ]:          0 :                     if (data.size() == scriptid.size()) {
     168 [ #  # ][ #  # ]:          0 :                         std::copy(data.begin(), data.end(), scriptid.begin());
     169                 :          0 :                         return scriptid;
     170                 :            :                     }
     171                 :            :                 }
     172                 :            : 
     173         [ #  # ]:          0 :                 error_str = strprintf("Invalid Bech32 v0 address program size (%d %s), per BIP141", data.size(), byte_str);
     174         [ #  # ]:          0 :                 return CNoDestination();
     175                 :            :             }
     176                 :            : 
     177 [ #  # ][ #  # ]:          0 :             if (version == 1 && data.size() == WITNESS_V1_TAPROOT_SIZE) {
     178                 :            :                 static_assert(WITNESS_V1_TAPROOT_SIZE == WitnessV1Taproot::size());
     179         [ #  # ]:          0 :                 WitnessV1Taproot tap;
     180 [ #  # ][ #  # ]:          0 :                 std::copy(data.begin(), data.end(), tap.begin());
     181                 :          0 :                 return tap;
     182                 :            :             }
     183                 :            : 
     184         [ #  # ]:          0 :             if (version > 16) {
     185         [ #  # ]:          0 :                 error_str = "Invalid Bech32 address witness version";
     186         [ #  # ]:          0 :                 return CNoDestination();
     187                 :            :             }
     188                 :            : 
     189 [ #  # ][ #  # ]:          0 :             if (data.size() < 2 || data.size() > BECH32_WITNESS_PROG_MAX_LEN) {
     190         [ #  # ]:          0 :                 error_str = strprintf("Invalid Bech32 address program size (%d %s)", data.size(), byte_str);
     191         [ #  # ]:          0 :                 return CNoDestination();
     192                 :            :             }
     193                 :            : 
     194         [ #  # ]:          0 :             return WitnessUnknown{version, data};
     195                 :            :         } else {
     196         [ #  # ]:          0 :             error_str = strprintf("Invalid padding in Bech32 data section");
     197         [ #  # ]:          0 :             return CNoDestination();
     198                 :            :         }
     199                 :            :     }
     200                 :            : 
     201                 :            :     // Perform Bech32 error location
     202         [ #  # ]:          0 :     auto res = bech32::LocateErrors(str);
     203         [ #  # ]:          0 :     error_str = res.first;
     204         [ #  # ]:          0 :     if (error_locations) *error_locations = std::move(res.second);
     205         [ #  # ]:          0 :     return CNoDestination();
     206                 :          0 : }
     207                 :            : } // namespace
     208                 :            : 
     209                 :          0 : CKey DecodeSecret(const std::string& str)
     210                 :            : {
     211                 :          0 :     CKey key;
     212                 :          0 :     std::vector<unsigned char> data;
     213 [ #  # ][ #  # ]:          0 :     if (DecodeBase58Check(str, data, 34)) {
     214 [ #  # ][ #  # ]:          0 :         const std::vector<unsigned char>& privkey_prefix = Params().Base58Prefix(CChainParams::SECRET_KEY);
     215 [ #  # ][ #  # ]:          0 :         if ((data.size() == 32 + privkey_prefix.size() || (data.size() == 33 + privkey_prefix.size() && data.back() == 1)) &&
         [ #  # ][ #  # ]
     216         [ #  # ]:          0 :             std::equal(privkey_prefix.begin(), privkey_prefix.end(), data.begin())) {
     217                 :          0 :             bool compressed = data.size() == 33 + privkey_prefix.size();
     218         [ #  # ]:          0 :             key.Set(data.begin() + privkey_prefix.size(), data.begin() + privkey_prefix.size() + 32, compressed);
     219                 :          0 :         }
     220                 :          0 :     }
     221         [ #  # ]:          0 :     if (!data.empty()) {
     222         [ #  # ]:          0 :         memory_cleanse(data.data(), data.size());
     223                 :          0 :     }
     224                 :          0 :     return key;
     225         [ #  # ]:          0 : }
     226                 :            : 
     227                 :          0 : std::string EncodeSecret(const CKey& key)
     228                 :            : {
     229         [ #  # ]:          0 :     assert(key.IsValid());
     230                 :          0 :     std::vector<unsigned char> data = Params().Base58Prefix(CChainParams::SECRET_KEY);
     231 [ #  # ][ #  # ]:          0 :     data.insert(data.end(), key.begin(), key.end());
                 [ #  # ]
     232 [ #  # ][ #  # ]:          0 :     if (key.IsCompressed()) {
     233         [ #  # ]:          0 :         data.push_back(1);
     234                 :          0 :     }
     235 [ #  # ][ #  # ]:          0 :     std::string ret = EncodeBase58Check(data);
     236         [ #  # ]:          0 :     memory_cleanse(data.data(), data.size());
     237                 :          0 :     return ret;
     238         [ #  # ]:          0 : }
     239                 :            : 
     240                 :          0 : CExtPubKey DecodeExtPubKey(const std::string& str)
     241                 :            : {
     242                 :          0 :     CExtPubKey key;
     243                 :          0 :     std::vector<unsigned char> data;
     244 [ #  # ][ #  # ]:          0 :     if (DecodeBase58Check(str, data, 78)) {
     245 [ #  # ][ #  # ]:          0 :         const std::vector<unsigned char>& prefix = Params().Base58Prefix(CChainParams::EXT_PUBLIC_KEY);
     246 [ #  # ][ #  # ]:          0 :         if (data.size() == BIP32_EXTKEY_SIZE + prefix.size() && std::equal(prefix.begin(), prefix.end(), data.begin())) {
                 [ #  # ]
     247         [ #  # ]:          0 :             key.Decode(data.data() + prefix.size());
     248                 :          0 :         }
     249                 :          0 :     }
     250                 :            :     return key;
     251                 :          0 : }
     252                 :            : 
     253                 :          0 : std::string EncodeExtPubKey(const CExtPubKey& key)
     254                 :            : {
     255                 :          0 :     std::vector<unsigned char> data = Params().Base58Prefix(CChainParams::EXT_PUBLIC_KEY);
     256                 :          0 :     size_t size = data.size();
     257         [ #  # ]:          0 :     data.resize(size + BIP32_EXTKEY_SIZE);
     258         [ #  # ]:          0 :     key.Encode(data.data() + size);
     259 [ #  # ][ #  # ]:          0 :     std::string ret = EncodeBase58Check(data);
     260                 :          0 :     return ret;
     261         [ #  # ]:          0 : }
     262                 :            : 
     263                 :          0 : CExtKey DecodeExtKey(const std::string& str)
     264                 :            : {
     265                 :          0 :     CExtKey key;
     266                 :          0 :     std::vector<unsigned char> data;
     267 [ #  # ][ #  # ]:          0 :     if (DecodeBase58Check(str, data, 78)) {
     268 [ #  # ][ #  # ]:          0 :         const std::vector<unsigned char>& prefix = Params().Base58Prefix(CChainParams::EXT_SECRET_KEY);
     269 [ #  # ][ #  # ]:          0 :         if (data.size() == BIP32_EXTKEY_SIZE + prefix.size() && std::equal(prefix.begin(), prefix.end(), data.begin())) {
                 [ #  # ]
     270         [ #  # ]:          0 :             key.Decode(data.data() + prefix.size());
     271                 :          0 :         }
     272                 :          0 :     }
     273                 :          0 :     return key;
     274         [ #  # ]:          0 : }
     275                 :            : 
     276                 :          0 : std::string EncodeExtKey(const CExtKey& key)
     277                 :            : {
     278                 :          0 :     std::vector<unsigned char> data = Params().Base58Prefix(CChainParams::EXT_SECRET_KEY);
     279                 :          0 :     size_t size = data.size();
     280         [ #  # ]:          0 :     data.resize(size + BIP32_EXTKEY_SIZE);
     281         [ #  # ]:          0 :     key.Encode(data.data() + size);
     282 [ #  # ][ #  # ]:          0 :     std::string ret = EncodeBase58Check(data);
     283         [ #  # ]:          0 :     memory_cleanse(data.data(), data.size());
     284                 :          0 :     return ret;
     285         [ #  # ]:          0 : }
     286                 :            : 
     287                 :          0 : std::string EncodeDestination(const CTxDestination& dest)
     288                 :            : {
     289                 :          0 :     return std::visit(DestinationEncoder(Params()), dest);
     290                 :            : }
     291                 :            : 
     292                 :          0 : CTxDestination DecodeDestination(const std::string& str, std::string& error_msg, std::vector<int>* error_locations)
     293                 :            : {
     294                 :          0 :     return DecodeDestination(str, Params(), error_msg, error_locations);
     295                 :            : }
     296                 :            : 
     297                 :          0 : CTxDestination DecodeDestination(const std::string& str)
     298                 :            : {
     299                 :          0 :     std::string error_msg;
     300         [ #  # ]:          0 :     return DecodeDestination(str, error_msg);
     301                 :          0 : }
     302                 :            : 
     303                 :          0 : bool IsValidDestinationString(const std::string& str, const CChainParams& params)
     304                 :            : {
     305                 :          0 :     std::string error_msg;
     306 [ #  # ][ #  # ]:          0 :     return IsValidDestination(DecodeDestination(str, params, error_msg, nullptr));
     307                 :          0 : }
     308                 :            : 
     309                 :          0 : bool IsValidDestinationString(const std::string& str)
     310                 :            : {
     311                 :          0 :     return IsValidDestinationString(str, Params());
     312                 :            : }

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