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// Copyright (c) 2009-2010 Satoshi Nakamoto
// Copyright (c) 2009-2019 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#ifndef BITCOIN_SCRIPT_SIGNINGPROVIDER_H
#define BITCOIN_SCRIPT_SIGNINGPROVIDER_H
#include <key.h>
#include <pubkey.h>
#include <script/script.h>
#include <script/standard.h>
#include <sync.h>
struct KeyOriginInfo;
/** An interface to be implemented by keystores that support signing. */
class SigningProvider
{
public:
virtual ~SigningProvider() {}
virtual bool GetCScript(const CScriptID &scriptid, CScript& script) const { return false; }
virtual bool HaveCScript(const CScriptID &scriptid) const { return false; }
virtual bool GetPubKey(const CKeyID &address, CPubKey& pubkey) const { return false; }
virtual bool GetKey(const CKeyID &address, CKey& key) const { return false; }
virtual bool HaveKey(const CKeyID &address) const { return false; }
virtual bool GetKeyOrigin(const CKeyID& keyid, KeyOriginInfo& info) const { return false; }
};
extern const SigningProvider& DUMMY_SIGNING_PROVIDER;
class HidingSigningProvider : public SigningProvider
{
private:
const bool m_hide_secret;
const bool m_hide_origin;
const SigningProvider* m_provider;
public:
HidingSigningProvider(const SigningProvider* provider, bool hide_secret, bool hide_origin) : m_hide_secret(hide_secret), m_hide_origin(hide_origin), m_provider(provider) {}
bool GetCScript(const CScriptID& scriptid, CScript& script) const override;
bool GetPubKey(const CKeyID& keyid, CPubKey& pubkey) const override;
bool GetKey(const CKeyID& keyid, CKey& key) const override;
bool GetKeyOrigin(const CKeyID& keyid, KeyOriginInfo& info) const override;
};
struct FlatSigningProvider final : public SigningProvider
{
std::map<CScriptID, CScript> scripts;
std::map<CKeyID, CPubKey> pubkeys;
std::map<CKeyID, std::pair<CPubKey, KeyOriginInfo>> origins;
std::map<CKeyID, CKey> keys;
bool GetCScript(const CScriptID& scriptid, CScript& script) const override;
bool GetPubKey(const CKeyID& keyid, CPubKey& pubkey) const override;
bool GetKeyOrigin(const CKeyID& keyid, KeyOriginInfo& info) const override;
bool GetKey(const CKeyID& keyid, CKey& key) const override;
};
FlatSigningProvider Merge(const FlatSigningProvider& a, const FlatSigningProvider& b);
/** Fillable signing provider that keeps keys in an address->secret map */
class FillableSigningProvider : public SigningProvider
{
protected:
using KeyMap = std::map<CKeyID, CKey>;
using ScriptMap = std::map<CScriptID, CScript>;
KeyMap mapKeys GUARDED_BY(cs_KeyStore);
ScriptMap mapScripts GUARDED_BY(cs_KeyStore);
void ImplicitlyLearnRelatedKeyScripts(const CPubKey& pubkey) EXCLUSIVE_LOCKS_REQUIRED(cs_KeyStore);
public:
mutable RecursiveMutex cs_KeyStore;
virtual bool AddKeyPubKey(const CKey& key, const CPubKey &pubkey);
virtual bool AddKey(const CKey &key) { return AddKeyPubKey(key, key.GetPubKey()); }
virtual bool GetPubKey(const CKeyID &address, CPubKey& vchPubKeyOut) const override;
virtual bool HaveKey(const CKeyID &address) const override;
virtual std::set<CKeyID> GetKeys() const;
virtual bool GetKey(const CKeyID &address, CKey &keyOut) const override;
virtual bool AddCScript(const CScript& redeemScript);
virtual bool HaveCScript(const CScriptID &hash) const override;
virtual std::set<CScriptID> GetCScripts() const;
virtual bool GetCScript(const CScriptID &hash, CScript& redeemScriptOut) const override;
};
/** Return the CKeyID of the key involved in a script (if there is a unique one). */
CKeyID GetKeyForDestination(const SigningProvider& store, const CTxDestination& dest);
#endif // BITCOIN_SCRIPT_SIGNINGPROVIDER_H
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