diff options
Diffstat (limited to 'src/key.h')
| -rw-r--r-- | src/key.h | 185 |
1 files changed, 3 insertions, 182 deletions
@@ -7,13 +7,15 @@ #define BITCOIN_KEY_H #include "allocators.h" -#include "hash.h" #include "serialize.h" #include "uint256.h" #include <stdexcept> #include <vector> +class CPubKey; +class CExtPubKey; + /** * secp256k1: * const unsigned int PRIVATE_KEY_SIZE = 279; @@ -24,169 +26,6 @@ * script supports up to 75 for single byte push */ -/** A reference to a CKey: the Hash160 of its serialized public key */ -class CKeyID : public uint160 -{ -public: - CKeyID() : uint160(0) {} - CKeyID(const uint160& in) : uint160(in) {} -}; - -/** An encapsulated public key. */ -class CPubKey -{ -private: - - /** - * Just store the serialized data. - * Its length can very cheaply be computed from the first byte. - */ - unsigned char vch[65]; - - //! Compute the length of a pubkey with a given first byte. - unsigned int static GetLen(unsigned char chHeader) - { - if (chHeader == 2 || chHeader == 3) - return 33; - if (chHeader == 4 || chHeader == 6 || chHeader == 7) - return 65; - return 0; - } - - //! Set this key data to be invalid - void Invalidate() - { - vch[0] = 0xFF; - } - -public: - //! Construct an invalid public key. - CPubKey() - { - Invalidate(); - } - - //! Initialize a public key using begin/end iterators to byte data. - template <typename T> - void Set(const T pbegin, const T pend) - { - int len = pend == pbegin ? 0 : GetLen(pbegin[0]); - if (len && len == (pend - pbegin)) - memcpy(vch, (unsigned char*)&pbegin[0], len); - else - Invalidate(); - } - - //! Construct a public key using begin/end iterators to byte data. - template <typename T> - CPubKey(const T pbegin, const T pend) - { - Set(pbegin, pend); - } - - //! Construct a public key from a byte vector. - CPubKey(const std::vector<unsigned char>& vch) - { - Set(vch.begin(), vch.end()); - } - - //! Simple read-only vector-like interface to the pubkey data. - unsigned int size() const { return GetLen(vch[0]); } - const unsigned char* begin() const { return vch; } - const unsigned char* end() const { return vch + size(); } - const unsigned char& operator[](unsigned int pos) const { return vch[pos]; } - - //! Comparator implementation. - friend bool operator==(const CPubKey& a, const CPubKey& b) - { - return a.vch[0] == b.vch[0] && - memcmp(a.vch, b.vch, a.size()) == 0; - } - friend bool operator!=(const CPubKey& a, const CPubKey& b) - { - return !(a == b); - } - friend bool operator<(const CPubKey& a, const CPubKey& b) - { - return a.vch[0] < b.vch[0] || - (a.vch[0] == b.vch[0] && memcmp(a.vch, b.vch, a.size()) < 0); - } - - //! 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 - { - unsigned int len = size(); - ::WriteCompactSize(s, len); - s.write((char*)vch, len); - } - template <typename Stream> - void Unserialize(Stream& s, int nType, int nVersion) - { - unsigned int len = ::ReadCompactSize(s); - if (len <= 65) { - s.read((char*)vch, len); - } else { - // invalid pubkey, skip available data - char dummy; - while (len--) - s.read(&dummy, 1); - Invalidate(); - } - } - - //! Get the KeyID of this public key (hash of its serialization) - CKeyID GetID() const - { - return CKeyID(Hash160(vch, vch + size())); - } - - //! Get the 256-bit hash of this public key. - uint256 GetHash() const - { - return Hash(vch, vch + size()); - } - - /* - * Check syntactic correctness. - * - * Note that this is consensus critical as CheckSig() calls it! - */ - bool IsValid() const - { - return size() > 0; - } - - //! fully validate whether this is a valid public key (more expensive than IsValid()) - bool IsFullyValid() const; - - //! Check whether this is a compressed public key. - bool IsCompressed() const - { - return size() == 33; - } - - /** - * Verify a DER signature (~72 bytes). - * If this public key is not fully valid, the return value will be false. - */ - bool Verify(const uint256& hash, const std::vector<unsigned char>& vchSig) const; - - //! Recover a public key from a compact signature. - bool RecoverCompact(const uint256& hash, const std::vector<unsigned char>& vchSig); - - //! Turn this public key into an uncompressed public key. - bool Decompress(); - - //! Derive BIP32 child pubkey. - bool Derive(CPubKey& pubkeyChild, unsigned char ccChild[32], unsigned int nChild, const unsigned char cc[32]) const; -}; - - /** * secure_allocator is defined in allocators.h * CPrivKey is a serialized private key, with all parameters included (279 bytes) @@ -304,24 +143,6 @@ public: static bool CheckSignatureElement(const unsigned char* vch, int len, bool half); }; -struct CExtPubKey { - unsigned char nDepth; - unsigned char vchFingerprint[4]; - unsigned int nChild; - unsigned char vchChainCode[32]; - CPubKey pubkey; - - 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 && - memcmp(&a.vchChainCode[0], &b.vchChainCode[0], 32) == 0 && a.pubkey == b.pubkey; - } - - void Encode(unsigned char code[74]) const; - void Decode(const unsigned char code[74]); - bool Derive(CExtPubKey& out, unsigned int nChild) const; -}; - struct CExtKey { unsigned char nDepth; unsigned char vchFingerprint[4]; |