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// Copyright (c) 2009-2014 The Bitcoin developers
// Distributed under the MIT/X11 software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#ifndef BITCOIN_EC_WRAPPER_H
#define BITCOIN_EC_WRAPPER_H
#include <cstddef>
#include <vector>
#include <openssl/ec.h>
class uint256;
// RAII Wrapper around OpenSSL's EC_KEY
class CECKey {
private:
EC_KEY *pkey;
public:
CECKey();
~CECKey();
void GetSecretBytes(unsigned char vch[32]) const;
void SetSecretBytes(const unsigned char vch[32]);
int GetPrivKeySize(bool fCompressed);
int GetPrivKey(unsigned char* privkey, bool fCompressed);
bool SetPrivKey(const unsigned char* privkey, size_t size, bool fSkipCheck=false);
void GetPubKey(std::vector<unsigned char>& pubkey, bool fCompressed);
bool SetPubKey(const unsigned char* pubkey, size_t size);
bool Sign(const uint256 &hash, std::vector<unsigned char>& vchSig, bool lowS);
bool Verify(const uint256 &hash, const std::vector<unsigned char>& vchSig);
bool SignCompact(const uint256 &hash, unsigned char *p64, int &rec);
// reconstruct public key from a compact signature
// This is only slightly more CPU intensive than just verifying it.
// If this function succeeds, the recovered public key is guaranteed to be valid
// (the signature is a valid signature of the given data for that key)
bool Recover(const uint256 &hash, const unsigned char *p64, int rec);
static bool TweakSecret(unsigned char vchSecretOut[32], const unsigned char vchSecretIn[32], const unsigned char vchTweak[32]);
bool TweakPublic(const unsigned char vchTweak[32]);
static bool SanityCheck();
};
#endif
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