#include "uint256.h"
#include "hash.h"
#include "bignum.h"
+#include "ies.h"
#include <openssl/ec.h> // for EC_KEY definition
CScriptID(const uint160 &in) : uint160(in) { }
};
-/** An encapsulated public key. */
-class CPubKey {
+/** An encapsulated OpenSSL Elliptic Curve key (public) */
+class CPubKey
+{
private:
- std::vector<unsigned char> vchPubKey;
- friend class CKey;
+
+ /**
+ * Just store the serialized data.
+ * Its length can very cheaply be computed from the first byte.
+ */
+ unsigned char vbytes[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()
+ {
+ vbytes[0] = 0xFF;
+ }
public:
- CPubKey() { }
- CPubKey(const std::vector<unsigned char> &vchPubKeyIn) : vchPubKey(vchPubKeyIn) { }
- friend bool operator==(const CPubKey &a, const CPubKey &b) { return a.vchPubKey == b.vchPubKey; }
- friend bool operator!=(const CPubKey &a, const CPubKey &b) { return a.vchPubKey != b.vchPubKey; }
- friend bool operator<(const CPubKey &a, const CPubKey &b) { return a.vchPubKey < b.vchPubKey; }
+ // Construct an invalid public key.
+ CPubKey()
+ {
+ Invalidate();
+ }
- IMPLEMENT_SERIALIZE(
- READWRITE(vchPubKey);
- )
+ // 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(vbytes, (unsigned char*)&pbegin[0], len);
+ else
+ Invalidate();
+ }
- CKeyID GetID() const {
- return CKeyID(Hash160(vchPubKey));
+ void Set(const std::vector<unsigned char>& vch)
+ {
+ Set(vch.begin(), vch.end());
}
- uint256 GetHash() const {
- return Hash(vchPubKey.begin(), vchPubKey.end());
+ template <typename T>
+ CPubKey(const T pbegin, const T pend)
+ {
+ Set(pbegin, pend);
}
- bool IsValid() const {
- return vchPubKey.size() == 33 || vchPubKey.size() == 65;
+ CPubKey(const std::vector<unsigned char>& vch)
+ {
+ Set(vch.begin(), vch.end());
}
- bool IsCompressed() const {
- return vchPubKey.size() == 33;
+ // Read-only vector-like interface to the data.
+ unsigned int size() const { return GetLen(vbytes[0]); }
+ const unsigned char* begin() const { return vbytes; }
+ const unsigned char* end() const { return vbytes + size(); }
+ const unsigned char& operator[](unsigned int pos) const { return vbytes[pos]; }
+
+ friend bool operator==(const CPubKey& a, const CPubKey& b) { return a.vbytes[0] == b.vbytes[0] && memcmp(a.vbytes, b.vbytes, 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.vbytes[0] < b.vbytes[0] || (a.vbytes[0] == b.vbytes[0] && memcmp(a.vbytes, b.vbytes, 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*)vbytes, len);
+ }
+ template <typename Stream>
+ void Unserialize(Stream& s, int nType, int nVersion)
+ {
+ unsigned int len = ::ReadCompactSize(s);
+ if (len <= 65) {
+ s.read((char*)vbytes, len);
+ } else {
+ // invalid pubkey, skip available data
+ char dummy;
+ while (len--)
+ s.read(&dummy, 1);
+ Invalidate();
+ }
}
- std::vector<unsigned char> Raw() const {
- return vchPubKey;
+ CKeyID GetID() const
+ {
+ return CKeyID(Hash160(vbytes, vbytes + size()));
+ }
+
+ uint256 GetHash() const
+ {
+ return Hash(vbytes, vbytes + 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
+ {
+ const unsigned char* pbegin = &vbytes[0];
+ EC_KEY *pkey = EC_KEY_new_by_curve_name(NID_secp256k1);
+ if (o2i_ECPublicKey(&pkey, &pbegin, size()))
+ {
+ EC_KEY_free(pkey);
+ return true;
+ }
+ return false;
+ }
+
+ //! Check whether this is a compressed public key.
+ bool IsCompressed() const
+ {
+ return size() == 33;
+ }
+
+ bool Verify(const uint256& hash, const std::vector<unsigned char>& vchSig) const;
+ bool VerifyCompact(uint256 hash, const std::vector<unsigned char>& vchSig);
+
+ bool SetCompactSignature(uint256 hash, const std::vector<unsigned char>& vchSig);
+
+ // Reserialize to DER
+ static bool ReserealizeSignature(std::vector<unsigned char>& vchSig);
+
+ // Encrypt data
+ void EncryptData(const std::vector<unsigned char>& data, std::vector<unsigned char>& encrypted);
+};
// secure_allocator is defined in allocators.h
// CPrivKey is a serialized private key, with all parameters included (279 bytes)
// CSecret is a serialization of just the secret parameter (32 bytes)
typedef std::vector<unsigned char, secure_allocator<unsigned char> > CSecret;
-/** An encapsulated OpenSSL Elliptic Curve key (public and/or private) */
+/** An encapsulated OpenSSL Elliptic Curve key (private) */
class CKey
{
protected:
EC_KEY* pkey;
bool fSet;
- bool fCompressedPubKey;
-
- void SetCompressedPubKey();
public:
CKey();
CKey(const CKey& b);
+ CKey(const CSecret& b, bool fCompressed=true);
CKey& operator=(const CKey& b);
bool IsNull() const;
bool IsCompressed() const;
- void MakeNewKey(bool fCompressed);
+ void SetCompressedPubKey(bool fCompressed=true);
+ void MakeNewKey(bool fCompressed=true);
bool SetPrivKey(const CPrivKey& vchPrivKey);
- bool SetSecret(const CSecret& vchSecret, bool fCompressed = false);
+ bool SetSecret(const CSecret& vchSecret, bool fCompressed = true);
CSecret GetSecret(bool &fCompressed) const;
+ CSecret GetSecret() const;
CPrivKey GetPrivKey() const;
- bool SetPubKey(const CPubKey& vchPubKey);
CPubKey GetPubKey() const;
+ bool WritePEM(BIO *streamObj, const SecureString &strPassKey) const;
bool Sign(uint256 hash, std::vector<unsigned char>& vchSig);
// 0x1D = second key with even y, 0x1E = second key with odd y
bool SignCompact(uint256 hash, std::vector<unsigned char>& vchSig);
- // 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 SetCompactSignature(uint256 hash, const std::vector<unsigned char>& vchSig);
-
- bool Verify(uint256 hash, const std::vector<unsigned char>& vchSig);
-
- // Verify a compact signature
- bool VerifyCompact(uint256 hash, const std::vector<unsigned char>& vchSig);
-
bool IsValid();
// Check whether an element of a signature (r or s) is valid.
static bool CheckSignatureElement(const unsigned char *vch, int len, bool half);
- // Reserialize to DER
- static bool ReserealizeSignature(std::vector<unsigned char>& vchSig);
+ // Decrypt data
+ void DecryptData(const std::vector<unsigned char>& encrypted, std::vector<unsigned char>& data);
};
class CPoint
// Initialize from octets stream
bool setBytes(const std::vector<unsigned char> &vchBytes);
+ // Initialize from pubkey
+ bool setPubKey(const CPubKey &vchPubKey);
+
// Serialize to octets stream
bool getBytes(std::vector<unsigned char> &vchBytes);
// Calculate G*m + q
bool ECMULGEN(const CBigNum &bnMultiplier, const CPoint &qPoint);
- bool IsInfinity() { return EC_POINT_is_at_infinity(group, point); }
+ bool IsInfinity() { return EC_POINT_is_at_infinity(group, point) != 0; }
};
class CMalleablePubKey
{
private:
- unsigned char nVersion;
CPubKey pubKeyL;
CPubKey pubKeyH;
friend class CMalleableKey;
static const unsigned char CURRENT_VERSION = 1;
public:
- CMalleablePubKey() { nVersion = CMalleablePubKey::CURRENT_VERSION; }
+ CMalleablePubKey() { }
+ CMalleablePubKey(const CMalleablePubKey& mpk)
+ {
+ pubKeyL = mpk.pubKeyL;
+ pubKeyH = mpk.pubKeyH;
+ }
+ CMalleablePubKey(const std::vector<unsigned char> &vchPubKeyPair) { setvch(vchPubKeyPair); }
CMalleablePubKey(const std::string& strMalleablePubKey) { SetString(strMalleablePubKey); }
- CMalleablePubKey(const CPubKey &pubKeyInL, const CPubKey &pubKeyInH) : pubKeyL(pubKeyInL), pubKeyH(pubKeyInH) { nVersion = CMalleablePubKey::CURRENT_VERSION; }
- CMalleablePubKey(const std::vector<unsigned char> &pubKeyInL, const std::vector<unsigned char> &pubKeyInH) : pubKeyL(pubKeyInL), pubKeyH(pubKeyInH) { nVersion = CMalleablePubKey::CURRENT_VERSION; }
+ CMalleablePubKey(const CPubKey &pubKeyInL, const CPubKey &pubKeyInH) : pubKeyL(pubKeyInL), pubKeyH(pubKeyInH) { }
IMPLEMENT_SERIALIZE(
- READWRITE(this->nVersion);
- nVersion = this->nVersion;
READWRITE(pubKeyL);
READWRITE(pubKeyH);
)
bool operator==(const CMalleablePubKey &b);
bool operator!=(const CMalleablePubKey &b) { return !(*this == b); }
+ CMalleablePubKey& operator=(const CMalleablePubKey& mpk) {
+ pubKeyL = mpk.pubKeyL;
+ pubKeyH = mpk.pubKeyH;
+ return *this;
+ }
- std::string ToString();
+ std::string ToString() const;
bool SetString(const std::string& strMalleablePubKey);
- uint256 GetID() const;
+
+ CKeyID GetID() const {
+ return pubKeyL.GetID();
+ }
+
+ bool setvch(const std::vector<unsigned char> &vchPubKeyPair);
+ std::vector<unsigned char> Raw() const;
CPubKey& GetL() { return pubKeyL; }
CPubKey& GetH() { return pubKeyH; }
class CMalleableKey
{
private:
- unsigned char nVersion;
CSecret vchSecretL;
CSecret vchSecretH;
friend class CMalleableKeyView;
- static const unsigned char CURRENT_VERSION = 1;
-
public:
CMalleableKey();
CMalleableKey(const CMalleableKey &b);
CMalleableKey(const CSecret &L, const CSecret &H);
- CMalleableKey& operator=(const CMalleableKey &b);
~CMalleableKey();
IMPLEMENT_SERIALIZE(
- READWRITE(this->nVersion);
- nVersion = this->nVersion;
READWRITE(vchSecretL);
READWRITE(vchSecretH);
)
- std::string ToString();
+ std::string ToString() const;
bool SetString(const std::string& strMalleablePubKey);
+ std::vector<unsigned char> Raw() const;
+ CMalleableKey& operator=(const CMalleableKey& mk) {
+ vchSecretL = mk.vchSecretL;
+ vchSecretH = mk.vchSecretH;
+ return *this;
+ }
void Reset();
void MakeNewKeys();
bool IsNull() const;
+ bool IsValid() const { return !IsNull() && GetMalleablePubKey().IsValid(); }
bool SetSecrets(const CSecret &pvchSecretL, const CSecret &pvchSecretH);
- void GetSecrets(CSecret &pvchSecretL, CSecret &pvchSecretH) const;
- CMalleablePubKey GetMalleablePubKey() const;
+ CSecret GetSecretL() const { return vchSecretL; }
+ CSecret GetSecretH() const { return vchSecretH; }
- bool CheckKeyVariant(const CPubKey &R, const CPubKey &vchPubKeyVariant);
- bool CheckKeyVariant(const CPubKey &R, const CPubKey &vchPubKeyVariant, CKey &privKeyVariant);
+ CKeyID GetID() const {
+ return GetMalleablePubKey().GetID();
+ }
+ CMalleablePubKey GetMalleablePubKey() const;
+ bool CheckKeyVariant(const CPubKey &R, const CPubKey &vchPubKeyVariant) const;
+ bool CheckKeyVariant(const CPubKey &R, const CPubKey &vchPubKeyVariant, CKey &privKeyVariant) const;
};
class CMalleableKeyView
{
private:
CSecret vchSecretL;
- std::vector<unsigned char> vchPubKeyH;
-
- // disabled constructor
- CMalleableKeyView() { };
-
- static const unsigned char CURRENT_VERSION = 1;
+ CPubKey vchPubKeyH;
public:
+ CMalleableKeyView() { };
CMalleableKeyView(const CMalleableKey &b);
- CMalleableKeyView(const CSecret &L, const CPubKey &pvchPubKeyH);
+ CMalleableKeyView(const std::string &strMalleableKey);
CMalleableKeyView(const CMalleableKeyView &b);
CMalleableKeyView& operator=(const CMalleableKey &b);
~CMalleableKeyView();
+ IMPLEMENT_SERIALIZE(
+ READWRITE(vchSecretL);
+ READWRITE(vchPubKeyH);
+ )
+
+ bool IsValid() const;
+ std::string ToString() const;
+ bool SetString(const std::string& strMalleablePubKey);
+ std::vector<unsigned char> Raw() const;
+ CMalleableKeyView& operator=(const CMalleableKeyView& mkv) {
+ vchSecretL = mkv.vchSecretL;
+ vchPubKeyH = mkv.vchPubKeyH;
+ return *this;
+ }
+
+ CKeyID GetID() const {
+ return GetMalleablePubKey().GetID();
+ }
CMalleablePubKey GetMalleablePubKey() const;
+ CMalleableKey GetMalleableKey(const CSecret &vchSecretH) const { return CMalleableKey(vchSecretL, vchSecretH); }
+ bool CheckKeyVariant(const CPubKey &R, const CPubKey &vchPubKeyVariant) const;
- bool CheckKeyVariant(const CPubKey &R, const CPubKey &vchPubKeyVariant);
+ bool operator <(const CMalleableKeyView& kv) const { return vchPubKeyH.GetID() < kv.vchPubKeyH.GetID(); }
};
#endif
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