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b815600295
Removes CombineSignatures and replaces its use in tests with ProduceSignature to test the same behavior for ProduceSignature.
93 lines
4.6 KiB
C++
93 lines
4.6 KiB
C++
// Copyright (c) 2009-2010 Satoshi Nakamoto
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// Copyright (c) 2009-2017 The Bitcoin Core developers
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// Distributed under the MIT software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#ifndef BITCOIN_SCRIPT_SIGN_H
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#define BITCOIN_SCRIPT_SIGN_H
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#include <script/interpreter.h>
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class CKey;
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class CKeyID;
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class CScript;
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class CScriptID;
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class CTransaction;
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struct CMutableTransaction;
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/** An interface to be implemented by keystores that support signing. */
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class SigningProvider
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{
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public:
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virtual ~SigningProvider() {}
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virtual bool GetCScript(const CScriptID &scriptid, CScript& script) const { return false; }
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virtual bool GetPubKey(const CKeyID &address, CPubKey& pubkey) const { return false; }
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virtual bool GetKey(const CKeyID &address, CKey& key) const { return false; }
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};
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extern const SigningProvider& DUMMY_SIGNING_PROVIDER;
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/** Interface for signature creators. */
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class BaseSignatureCreator {
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public:
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virtual ~BaseSignatureCreator() {}
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virtual const BaseSignatureChecker& Checker() const =0;
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/** Create a singular (non-script) signature. */
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virtual bool CreateSig(const SigningProvider& provider, std::vector<unsigned char>& vchSig, const CKeyID& keyid, const CScript& scriptCode, SigVersion sigversion) const =0;
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};
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/** A signature creator for transactions. */
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class MutableTransactionSignatureCreator : public BaseSignatureCreator {
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const CMutableTransaction* txTo;
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unsigned int nIn;
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int nHashType;
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CAmount amount;
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const MutableTransactionSignatureChecker checker;
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public:
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MutableTransactionSignatureCreator(const CMutableTransaction* txToIn, unsigned int nInIn, const CAmount& amountIn, int nHashTypeIn = SIGHASH_ALL);
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const BaseSignatureChecker& Checker() const override { return checker; }
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bool CreateSig(const SigningProvider& provider, std::vector<unsigned char>& vchSig, const CKeyID& keyid, const CScript& scriptCode, SigVersion sigversion) const override;
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};
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/** A signature creator that just produces 72-byte empty signatures. */
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extern const BaseSignatureCreator& DUMMY_SIGNATURE_CREATOR;
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typedef std::pair<CPubKey, std::vector<unsigned char>> SigPair;
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// This struct contains information from a transaction input and also contains signatures for that input.
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// The information contained here can be used to create a signature and is also filled by ProduceSignature
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// in order to construct final scriptSigs and scriptWitnesses.
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struct SignatureData {
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bool complete = false; ///< Stores whether the scriptSig and scriptWitness are complete
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CScript scriptSig; ///< The scriptSig of an input. Contains complete signatures or the traditional partial signatures format
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CScript redeem_script; ///< The redeemScript (if any) for the input
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CScript witness_script; ///< The witnessScript (if any) for the input. witnessScripts are used in P2WSH outputs.
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CScriptWitness scriptWitness; ///< The scriptWitness of an input. Contains complete signatures or the traditional partial signatures format. scriptWitness is part of a transaction input per BIP 144.
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std::map<CKeyID, SigPair> signatures; ///< BIP 174 style partial signatures for the input. May contain all signatures necessary for producing a final scriptSig or scriptWitness.
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SignatureData() {}
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explicit SignatureData(const CScript& script) : scriptSig(script) {}
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void MergeSignatureData(SignatureData sigdata);
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};
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/** Produce a script signature using a generic signature creator. */
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bool ProduceSignature(const SigningProvider& provider, const BaseSignatureCreator& creator, const CScript& scriptPubKey, SignatureData& sigdata);
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/** Produce a script signature for a transaction. */
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bool SignSignature(const SigningProvider &provider, const CScript& fromPubKey, CMutableTransaction& txTo, unsigned int nIn, const CAmount& amount, int nHashType);
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bool SignSignature(const SigningProvider &provider, const CTransaction& txFrom, CMutableTransaction& txTo, unsigned int nIn, int nHashType);
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/** Extract signature data from a transaction input, and insert it. */
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SignatureData DataFromTransaction(const CMutableTransaction& tx, unsigned int nIn, const CTxOut& txout);
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void UpdateInput(CTxIn& input, const SignatureData& data);
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/* Check whether we know how to sign for an output like this, assuming we
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* have all private keys. While this function does not need private keys, the passed
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* provider is used to look up public keys and redeemscripts by hash.
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* Solvability is unrelated to whether we consider this output to be ours. */
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bool IsSolvable(const SigningProvider& provider, const CScript& script);
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#endif // BITCOIN_SCRIPT_SIGN_H
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