Refactor: move code from key.h to key.cpp

1 files changed, 23 insertions, 245 deletions

diff --git a/src/key.h b/src/key.h
index 1579cdc40a..f7255fcaf5 100644
--- a/src/key.h
+++ b/src/key.h
@@ -8,13 +8,11 @@
 #include <stdexcept>
 #include <vector>
 
-#include <openssl/ec.h>
-#include <openssl/ecdsa.h>
-#include <openssl/obj_mac.h>
-
 #include "allocators.h"
 #include "uint256.h"
 
+#include <openssl/ec.h> // for EC_KEY definition
+
 // secp160k1
 // const unsigned int PRIVATE_KEY_SIZE = 192;
 // const unsigned int PUBLIC_KEY_SIZE  = 41;
@@ -38,9 +36,6 @@
 // see www.keylength.com
 // script supports up to 75 for single byte push
 
-int extern EC_KEY_regenerate_key(EC_KEY *eckey, BIGNUM *priv_key);
-int extern ECDSA_SIG_recover_key_GFp(EC_KEY *eckey, ECDSA_SIG *ecsig, const unsigned char *msg, int msglen, int recid, int check);
-
 class key_error : public std::runtime_error
 {
 public:
@@ -62,267 +57,50 @@ protected:
     bool fSet;
     bool fCompressedPubKey;
 
-    void SetCompressedPubKey()
-    {
-        EC_KEY_set_conv_form(pkey, POINT_CONVERSION_COMPRESSED);
-        fCompressedPubKey = true;
-    }
+    void SetCompressedPubKey();
 
 public:
 
-    void Reset()
-    {
-        fCompressedPubKey = false;
-        pkey = EC_KEY_new_by_curve_name(NID_secp256k1);
-        if (pkey == NULL)
-            throw key_error("CKey::CKey() : EC_KEY_new_by_curve_name failed");
-        fSet = false;
-    }
-
-    CKey()
-    {
-        Reset();
-    }
-
-    CKey(const CKey& b)
-    {
-        pkey = EC_KEY_dup(b.pkey);
-        if (pkey == NULL)
-            throw key_error("CKey::CKey(const CKey&) : EC_KEY_dup failed");
-        fSet = b.fSet;
-    }
-
-    CKey& operator=(const CKey& b)
-    {
-        if (!EC_KEY_copy(pkey, b.pkey))
-            throw key_error("CKey::operator=(const CKey&) : EC_KEY_copy failed");
-        fSet = b.fSet;
-        return (*this);
-    }
-
-    ~CKey()
-    {
-        EC_KEY_free(pkey);
-    }
-
-    bool IsNull() const
-    {
-        return !fSet;
-    }
+    void Reset();
 
-    bool IsCompressed() const
-    {
-        return fCompressedPubKey;
-    }
+    CKey();
+    CKey(const CKey& b);
 
-    void MakeNewKey(bool fCompressed)
-    {
-        if (!EC_KEY_generate_key(pkey))
-            throw key_error("CKey::MakeNewKey() : EC_KEY_generate_key failed");
-        if (fCompressed)
-            SetCompressedPubKey();
-        fSet = true;
-    }
+    CKey& operator=(const CKey& b);
 
-    bool SetPrivKey(const CPrivKey& vchPrivKey)
-    {
-        const unsigned char* pbegin = &vchPrivKey[0];
-        if (!d2i_ECPrivateKey(&pkey, &pbegin, vchPrivKey.size()))
-            return false;
-        fSet = true;
-        return true;
-    }
+    ~CKey();
 
-    bool SetSecret(const CSecret& vchSecret, bool fCompressed = false)
-    {
-        EC_KEY_free(pkey);
-        pkey = EC_KEY_new_by_curve_name(NID_secp256k1);
-        if (pkey == NULL)
-            throw key_error("CKey::SetSecret() : EC_KEY_new_by_curve_name failed");
-        if (vchSecret.size() != 32)
-            throw key_error("CKey::SetSecret() : secret must be 32 bytes");
-        BIGNUM *bn = BN_bin2bn(&vchSecret[0],32,BN_new());
-        if (bn == NULL)
-            throw key_error("CKey::SetSecret() : BN_bin2bn failed");
-        if (!EC_KEY_regenerate_key(pkey,bn))
-        {
-            BN_clear_free(bn);
-            throw key_error("CKey::SetSecret() : EC_KEY_regenerate_key failed");
-        }
-        BN_clear_free(bn);
-        fSet = true;
-        if (fCompressed || fCompressedPubKey)
-            SetCompressedPubKey();
-        return true;
-    }
+    bool IsNull() const;
+    bool IsCompressed() const;
 
-    CSecret GetSecret(bool &fCompressed) const
-    {
-        CSecret vchRet;
-        vchRet.resize(32);
-        const BIGNUM *bn = EC_KEY_get0_private_key(pkey);
-        int nBytes = BN_num_bytes(bn);
-        if (bn == NULL)
-            throw key_error("CKey::GetSecret() : EC_KEY_get0_private_key failed");
-        int n=BN_bn2bin(bn,&vchRet[32 - nBytes]);
-        if (n != nBytes) 
-            throw key_error("CKey::GetSecret(): BN_bn2bin failed");
-        fCompressed = fCompressedPubKey;
-        return vchRet;
-    }
+    void MakeNewKey(bool fCompressed);
+    bool SetPrivKey(const CPrivKey& vchPrivKey);
+    bool SetSecret(const CSecret& vchSecret, bool fCompressed = false);
+    CSecret GetSecret(bool &fCompressed) const;
+    CPrivKey GetPrivKey() const;
+    bool SetPubKey(const std::vector<unsigned char>& vchPubKey);
+    std::vector<unsigned char> GetPubKey() const;
 
-    CPrivKey GetPrivKey() const
-    {
-        int nSize = i2d_ECPrivateKey(pkey, NULL);
-        if (!nSize)
-            throw key_error("CKey::GetPrivKey() : i2d_ECPrivateKey failed");
-        CPrivKey vchPrivKey(nSize, 0);
-        unsigned char* pbegin = &vchPrivKey[0];
-        if (i2d_ECPrivateKey(pkey, &pbegin) != nSize)
-            throw key_error("CKey::GetPrivKey() : i2d_ECPrivateKey returned unexpected size");
-        return vchPrivKey;
-    }
-
-    bool SetPubKey(const std::vector<unsigned char>& vchPubKey)
-    {
-        const unsigned char* pbegin = &vchPubKey[0];
-        if (!o2i_ECPublicKey(&pkey, &pbegin, vchPubKey.size()))
-            return false;
-        fSet = true;
-        if (vchPubKey.size() == 33)
-            SetCompressedPubKey();
-        return true;
-    }
-
-    std::vector<unsigned char> GetPubKey() const
-    {
-        int nSize = i2o_ECPublicKey(pkey, NULL);
-        if (!nSize)
-            throw key_error("CKey::GetPubKey() : i2o_ECPublicKey failed");
-        std::vector<unsigned char> vchPubKey(nSize, 0);
-        unsigned char* pbegin = &vchPubKey[0];
-        if (i2o_ECPublicKey(pkey, &pbegin) != nSize)
-            throw key_error("CKey::GetPubKey() : i2o_ECPublicKey returned unexpected size");
-        return vchPubKey;
-    }
-
-    bool Sign(uint256 hash, std::vector<unsigned char>& vchSig)
-    {
-        unsigned int nSize = ECDSA_size(pkey);
-        vchSig.resize(nSize); // Make sure it is big enough
-        if (!ECDSA_sign(0, (unsigned char*)&hash, sizeof(hash), &vchSig[0], &nSize, pkey))
-        {
-            vchSig.clear();
-            return false;
-        }
-        vchSig.resize(nSize); // Shrink to fit actual size
-        return true;
-    }
+    bool Sign(uint256 hash, std::vector<unsigned char>& vchSig);
 
     // create a compact signature (65 bytes), which allows reconstructing the used public key
     // The format is one header byte, followed by two times 32 bytes for the serialized r and s values.
     // The header byte: 0x1B = first key with even y, 0x1C = first key with odd y,
     //                  0x1D = second key with even y, 0x1E = second key with odd y
-    bool SignCompact(uint256 hash, std::vector<unsigned char>& vchSig)
-    {
-        bool fOk = false;
-        ECDSA_SIG *sig = ECDSA_do_sign((unsigned char*)&hash, sizeof(hash), pkey);
-        if (sig==NULL)
-            return false;
-        vchSig.clear();
-        vchSig.resize(65,0);
-        int nBitsR = BN_num_bits(sig->r);
-        int nBitsS = BN_num_bits(sig->s);
-        if (nBitsR <= 256 && nBitsS <= 256)
-        {
-            int nRecId = -1;
-            for (int i=0; i<4; i++)
-            {
-                CKey keyRec;
-                keyRec.fSet = true;
-                if (fCompressedPubKey)
-                    keyRec.SetCompressedPubKey();
-                if (ECDSA_SIG_recover_key_GFp(keyRec.pkey, sig, (unsigned char*)&hash, sizeof(hash), i, 1) == 1)
-                    if (keyRec.GetPubKey() == this->GetPubKey())
-                    {
-                        nRecId = i;
-                        break;
-                    }
-            }
-
-            if (nRecId == -1)
-                throw key_error("CKey::SignCompact() : unable to construct recoverable key");
-
-            vchSig[0] = nRecId+27+(fCompressedPubKey ? 4 : 0);
-            BN_bn2bin(sig->r,&vchSig[33-(nBitsR+7)/8]);
-            BN_bn2bin(sig->s,&vchSig[65-(nBitsS+7)/8]);
-            fOk = true;
-        }
-        ECDSA_SIG_free(sig);
-        return fOk;
-    }
+    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)
-    {
-        if (vchSig.size() != 65)
-            return false;
-        int nV = vchSig[0];
-        if (nV<27 || nV>=35)
-            return false;
-        ECDSA_SIG *sig = ECDSA_SIG_new();
-        BN_bin2bn(&vchSig[1],32,sig->r);
-        BN_bin2bn(&vchSig[33],32,sig->s);
-
-        EC_KEY_free(pkey);
-        pkey = EC_KEY_new_by_curve_name(NID_secp256k1);
-        if (nV >= 31)
-        {
-            SetCompressedPubKey();
-            nV -= 4;
-        }
-        if (ECDSA_SIG_recover_key_GFp(pkey, sig, (unsigned char*)&hash, sizeof(hash), nV - 27, 0) == 1)
-        {
-            fSet = true;
-            ECDSA_SIG_free(sig);
-            return true;
-        }
-        return false;
-    }
+    bool SetCompactSignature(uint256 hash, const std::vector<unsigned char>& vchSig);
 
-    bool Verify(uint256 hash, const std::vector<unsigned char>& vchSig)
-    {
-        // -1 = error, 0 = bad sig, 1 = good
-        if (ECDSA_verify(0, (unsigned char*)&hash, sizeof(hash), &vchSig[0], vchSig.size(), pkey) != 1)
-            return false;
-        return true;
-    }
+    bool Verify(uint256 hash, const std::vector<unsigned char>& vchSig);
 
     // Verify a compact signature
-    bool VerifyCompact(uint256 hash, const std::vector<unsigned char>& vchSig)
-    {
-        CKey key;
-        if (!key.SetCompactSignature(hash, vchSig))
-            return false;
-        if (GetPubKey() != key.GetPubKey())
-            return false;
-        return true;
-    }
-
-    bool IsValid()
-    {
-        if (!fSet)
-            return false;
+    bool VerifyCompact(uint256 hash, const std::vector<unsigned char>& vchSig);
 
-        bool fCompr;
-        CSecret secret = GetSecret(fCompr);
-        CKey key2;
-        key2.SetSecret(secret, fCompr);
-        return GetPubKey() == key2.GetPubKey();
-    }
+    bool IsValid();
 };
 
 #endif