src/ecwrapper.h

   1 // Copyright (c) 2009-2014 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 #ifndef BITCOIN_ECWRAPPER_H
   6 #define BITCOIN_ECWRAPPER_H
   7
   8 #include <cstddef>
   9 #include <vector>
  10
  11 #include <openssl/ec.h>
  12
  13 class uint256;
  14
  15 /** RAII Wrapper around OpenSSL's EC_KEY */
  16 class CECKey {
  17 private:
  18     EC_KEY *pkey;
  19
  20 public:
  21     CECKey();
  22     ~CECKey();
  23
  24     void GetPubKey(std::vector<unsigned char>& pubkey, bool fCompressed);
  25     bool SetPubKey(const unsigned char* pubkey, size_t size);
  26     bool Verify(const uint256 &hash, const std::vector<unsigned char>& vchSig);
  27
  28     /**
  29      * reconstruct public key from a compact signature
  30      * This is only slightly more CPU intensive than just verifying it.
  31      * If this function succeeds, the recovered public key is guaranteed to be valid
  32      * (the signature is a valid signature of the given data for that key)
  33      */
  34     bool Recover(const uint256 &hash, const unsigned char *p64, int rec);
  35
  36     bool TweakPublic(const unsigned char vchTweak[32]);
  37     static bool SanityCheck();
  38 };
  39
  40 #endif // BITCOIN_ECWRAPPER_H