git / moonbite-core / src/script/bitcoinconsensus.cpp · raw

// Copyright (c) 2009-2010 Satoshi Nakamoto// Copyright (c) 2009-2018 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 <script/bitcoinconsensus.h>#include <primitives/transaction.h>#include <pubkey.h>#include <script/interpreter.h>#include <version.h>namespace {/** A class that deserializes a single CTransaction one time. */class TxInputStream{public:    TxInputStream(int nTypeIn, int nVersionIn, const unsigned char *txTo, size_t txToLen) :    m_type(nTypeIn),    m_version(nVersionIn),    m_data(txTo),    m_remaining(txToLen)    {}    void read(char* pch, size_t nSize)    {        if (nSize > m_remaining)            throw std::ios_base::failure(std::string(__func__) + ": end of data");        if (pch == nullptr)            throw std::ios_base::failure(std::string(__func__) + ": bad destination buffer");        if (m_data == nullptr)            throw std::ios_base::failure(std::string(__func__) + ": bad source buffer");        memcpy(pch, m_data, nSize);        m_remaining -= nSize;        m_data += nSize;    }    template<typename T>    TxInputStream& operator>>(T&& obj)    {        ::Unserialize(*this, obj);        return *this;    }    int GetVersion() const { return m_version; }    int GetType() const { return m_type; }private:    const int m_type;    const int m_version;    const unsigned char* m_data;    size_t m_remaining;};inline int set_error(bitcoinconsensus_error* ret, bitcoinconsensus_error serror){    if (ret)        *ret = serror;    return 0;}struct ECCryptoClosure{    ECCVerifyHandle handle;};ECCryptoClosure instance_of_eccryptoclosure;} // namespace/** Check that all specified flags are part of the libconsensus interface. */static bool verify_flags(unsigned int flags){    return (flags & ~(bitcoinconsensus_SCRIPT_FLAGS_VERIFY_ALL)) == 0;}static int verify_script(const unsigned char *scriptPubKey, unsigned int scriptPubKeyLen, CAmount amount,                                    const unsigned char *txTo        , unsigned int txToLen,                                    unsigned int nIn, unsigned int flags, bitcoinconsensus_error* err){    if (!verify_flags(flags)) {        return set_error(err, bitcoinconsensus_ERR_INVALID_FLAGS);    }    try {        TxInputStream stream(SER_NETWORK, PROTOCOL_VERSION, txTo, txToLen);        CTransaction tx(deserialize, stream);        if (nIn >= tx.vin.size())            return set_error(err, bitcoinconsensus_ERR_TX_INDEX);        if (GetSerializeSize(tx, PROTOCOL_VERSION) != txToLen)            return set_error(err, bitcoinconsensus_ERR_TX_SIZE_MISMATCH);        // Regardless of the verification result, the tx did not error.        set_error(err, bitcoinconsensus_ERR_OK);        PrecomputedTransactionData txdata(tx);        return VerifyScript(tx.vin[nIn].scriptSig, CScript(scriptPubKey, scriptPubKey + scriptPubKeyLen), &tx.vin[nIn].scriptWitness, flags, TransactionSignatureChecker(&tx, nIn, amount, txdata), nullptr);    } catch (const std::exception&) {        return set_error(err, bitcoinconsensus_ERR_TX_DESERIALIZE); // Error deserializing    }}int bitcoinconsensus_verify_script_with_amount(const unsigned char *scriptPubKey, unsigned int scriptPubKeyLen, int64_t amount,                                    const unsigned char *txTo        , unsigned int txToLen,                                    unsigned int nIn, unsigned int flags, bitcoinconsensus_error* err){    CAmount am(amount);    return ::verify_script(scriptPubKey, scriptPubKeyLen, am, txTo, txToLen, nIn, flags, err);}int bitcoinconsensus_verify_script(const unsigned char *scriptPubKey, unsigned int scriptPubKeyLen,                                   const unsigned char *txTo        , unsigned int txToLen,                                   unsigned int nIn, unsigned int flags, bitcoinconsensus_error* err){    if (flags & bitcoinconsensus_SCRIPT_FLAGS_VERIFY_WITNESS) {        return set_error(err, bitcoinconsensus_ERR_AMOUNT_REQUIRED);    }    CAmount am(0);    return ::verify_script(scriptPubKey, scriptPubKeyLen, am, txTo, txToLen, nIn, flags, err);}unsigned int bitcoinconsensus_version(){    // Just use the API version for now    return BITCOINCONSENSUS_API_VER;}