diff options
Diffstat (limited to 'src/pubkey.h')
| -rw-r--r-- | src/pubkey.h | 72 |
1 files changed, 57 insertions, 15 deletions
diff --git a/src/pubkey.h b/src/pubkey.h index 1bd7c252a..490e8072a 100644 --- a/src/pubkey.h +++ b/src/pubkey.h @@ -1,5 +1,5 @@ // Copyright (c) 2009-2010 Satoshi Nakamoto -// Copyright (c) 2009-2014 The Bitcoin Core developers +// Copyright (c) 2009-2016 The Bitcoin Core developers // Distributed under the MIT software license, see the accompanying // file COPYING or http://www.opensource.org/licenses/mit-license.php. @@ -13,7 +13,7 @@ #include <stdexcept> #include <vector> -/** +/** * secp256k1: * const unsigned int PRIVATE_KEY_SIZE = 279; * const unsigned int PUBLIC_KEY_SIZE = 65; @@ -23,6 +23,8 @@ * script supports up to 75 for single byte push */ +const unsigned int BIP32_EXTKEY_SIZE = 74; + /** A reference to a CKey: the Hash160 of its serialized public key */ class CKeyID : public uint160 { @@ -86,9 +88,9 @@ public: } //! Construct a public key from a byte vector. - CPubKey(const std::vector<unsigned char>& vch) + CPubKey(const std::vector<unsigned char>& _vch) { - Set(vch.begin(), vch.end()); + Set(_vch.begin(), _vch.end()); } //! Simple read-only vector-like interface to the pubkey data. @@ -114,19 +116,15 @@ public: } //! Implement serialization, as if this was a byte vector. - unsigned int GetSerializeSize(int nType, int nVersion) const - { - return size() + 1; - } template <typename Stream> - void Serialize(Stream& s, int nType, int nVersion) const + void Serialize(Stream& s) const { unsigned int len = size(); ::WriteCompactSize(s, len); s.write((char*)vch, len); } template <typename Stream> - void Unserialize(Stream& s, int nType, int nVersion) + void Unserialize(Stream& s) { unsigned int len = ::ReadCompactSize(s); if (len <= 65) { @@ -154,7 +152,7 @@ public: /* * Check syntactic correctness. - * + * * Note that this is consensus critical as CheckSig() calls it! */ bool IsValid() const @@ -177,6 +175,11 @@ public: */ bool Verify(const uint256& hash, const std::vector<unsigned char>& vchSig) const; + /** + * Check whether a signature is normalized (lower-S). + */ + static bool CheckLowS(const std::vector<unsigned char>& vchSig); + //! Recover a public key from a compact signature. bool RecoverCompact(const uint256& hash, const std::vector<unsigned char>& vchSig); @@ -199,13 +202,52 @@ struct CExtPubKey { friend bool operator==(const CExtPubKey &a, const CExtPubKey &b) { - return a.nDepth == b.nDepth && memcmp(&a.vchFingerprint[0], &b.vchFingerprint[0], 4) == 0 && a.nChild == b.nChild && - a.chaincode == b.chaincode && a.pubkey == b.pubkey; + return a.nDepth == b.nDepth && + memcmp(&a.vchFingerprint[0], &b.vchFingerprint[0], sizeof(vchFingerprint)) == 0 && + a.nChild == b.nChild && + a.chaincode == b.chaincode && + a.pubkey == b.pubkey; } - void Encode(unsigned char code[74]) const; - void Decode(const unsigned char code[74]); + void Encode(unsigned char code[BIP32_EXTKEY_SIZE]) const; + void Decode(const unsigned char code[BIP32_EXTKEY_SIZE]); bool Derive(CExtPubKey& out, unsigned int nChild) const; + + void Serialize(CSizeComputer& s) const + { + // Optimized implementation for ::GetSerializeSize that avoids copying. + s.seek(BIP32_EXTKEY_SIZE + 1); // add one byte for the size (compact int) + } + template <typename Stream> + void Serialize(Stream& s) const + { + unsigned int len = BIP32_EXTKEY_SIZE; + ::WriteCompactSize(s, len); + unsigned char code[BIP32_EXTKEY_SIZE]; + Encode(code); + s.write((const char *)&code[0], len); + } + template <typename Stream> + void Unserialize(Stream& s) + { + unsigned int len = ::ReadCompactSize(s); + unsigned char code[BIP32_EXTKEY_SIZE]; + if (len != BIP32_EXTKEY_SIZE) + throw std::runtime_error("Invalid extended key size\n"); + s.read((char *)&code[0], len); + Decode(code); + } +}; + +/** Users of this module must hold an ECCVerifyHandle. The constructor and + * destructor of these are not allowed to run in parallel, though. */ +class ECCVerifyHandle +{ + static int refcount; + +public: + ECCVerifyHandle(); + ~ECCVerifyHandle(); }; #endif // BITCOIN_PUBKEY_H |