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Merge pull request #649 from sipa/comprpubkey

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Compressed pubkeys
This commit is contained in:
Pieter Wuille 2012-01-10 13:23:51 -08:00
commit afcf6f974f
8 changed files with 228 additions and 53 deletions
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21
src/base58.h
View file

@ -359,22 +359,25 @@ public:
class CBitcoinSecret : public CBase58Data
{
public:
void SetSecret(const CSecret& vchSecret)
{
void SetSecret(const CSecret& vchSecret, bool fCompressed)
{
assert(vchSecret.size() == 32);
SetData(fTestNet ? 239 : 128, &vchSecret[0], vchSecret.size());
if (fCompressed)
vchData.push_back(1);
}
CSecret GetSecret()
CSecret GetSecret(bool &fCompressedOut)
{
CSecret vchSecret;
vchSecret.resize(vchData.size());
memcpy(&vchSecret[0], &vchData[0], vchData.size());
vchSecret.resize(32);
memcpy(&vchSecret[0], &vchData[0], 32);
fCompressedOut = vchData.size() == 33;
return vchSecret;
}
bool IsValid() const
{
int nExpectedSize = 32;
bool fExpectTestNet = false;
switch(nVersion)
{
@ -388,12 +391,12 @@ public:
default:
return false;
}
return fExpectTestNet == fTestNet && vchData.size() == nExpectedSize;
return fExpectTestNet == fTestNet && (vchData.size() == 32 || (vchData.size() == 33 && vchData[32] == 1));
}
CBitcoinSecret(const CSecret& vchSecret)
CBitcoinSecret(const CSecret& vchSecret, bool fCompressed)
{
SetSecret(vchSecret);
SetSecret(vchSecret, fCompressed);
}
CBitcoinSecret()

3
src/bitcoinrpc.cpp
View file

@ -1701,6 +1701,9 @@ Value validateaddress(const Array& params, bool fHelp)
ret.push_back(Pair("pubkey", HexStr(vchPubKey)));
std::string strPubKey(vchPubKey.begin(), vchPubKey.end());
ret.push_back(Pair("pubkey58", EncodeBase58(vchPubKey)));
CKey key;
key.SetPubKey(vchPubKey);
ret.push_back(Pair("iscompressed", key.IsCompressed()));
}
else if (pwalletMain->HaveCScript(address.GetHash160()))
{

2
src/db.cpp
View file

@ -860,12 +860,14 @@ int CWalletDB::LoadWallet(CWallet* pwallet)
{
CPrivKey pkey;
ssValue >> pkey;
key.SetPubKey(vchPubKey);
key.SetPrivKey(pkey);
}
else
{
CWalletKey wkey;
ssValue >> wkey;
key.SetPubKey(vchPubKey);
key.SetPrivKey(wkey.vchPrivKey);
}
if (!pwallet->LoadKey(key))

48
src/key.h
View file

@ -59,16 +59,30 @@ class CKey
protected:
EC_KEY* pkey;
bool fSet;
bool fCompressedPubKey;
void SetCompressedPubKey()
{
EC_KEY_set_conv_form(pkey, POINT_CONVERSION_COMPRESSED);
fCompressedPubKey = true;
}
public:
CKey()
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);
@ -95,10 +109,17 @@ public:
return !fSet;
}
void MakeNewKey()
bool IsCompressed() const
{
return fCompressedPubKey;
}
void MakeNewKey(bool fCompressed = true)
{
if (!EC_KEY_generate_key(pkey))
throw key_error("CKey::MakeNewKey() : EC_KEY_generate_key failed");
if (fCompressed)
SetCompressedPubKey();
fSet = true;
}
@ -111,7 +132,7 @@ public:
return true;
}
bool SetSecret(const CSecret& vchSecret)
bool SetSecret(const CSecret& vchSecret, bool fCompressed = false)
{
EC_KEY_free(pkey);
pkey = EC_KEY_new_by_curve_name(NID_secp256k1);
@ -126,10 +147,12 @@ public:
throw key_error("CKey::SetSecret() : EC_KEY_regenerate_key failed");
BN_clear_free(bn);
fSet = true;
if (fCompressed || fCompressedPubKey)
SetCompressedPubKey();
return true;
}
CSecret GetSecret() const
CSecret GetSecret(bool &fCompressed) const
{
CSecret vchRet;
vchRet.resize(32);
@ -140,6 +163,7 @@ public:
int n=BN_bn2bin(bn,&vchRet[32 - nBytes]);
if (n != nBytes)
throw key_error("CKey::GetSecret(): BN_bn2bin failed");
fCompressed = fCompressedPubKey;
return vchRet;
}
@ -161,6 +185,8 @@ public:
if (!o2i_ECPublicKey(&pkey, &pbegin, vchPubKey.size()))
return false;
fSet = true;
if (vchPubKey.size() == 33)
SetCompressedPubKey();
return true;
}
@ -210,6 +236,8 @@ public:
{
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())
{
@ -221,7 +249,7 @@ public:
if (nRecId == -1)
throw key_error("CKey::SignCompact() : unable to construct recoverable key");
vchSig[0] = nRecId+27;
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;
@ -238,7 +266,8 @@ public:
{
if (vchSig.size() != 65)
return false;
if (vchSig[0]<27 || vchSig[0]>=31)
int nV = vchSig[0];
if (nV<27 || nV>=35)
return false;
ECDSA_SIG *sig = ECDSA_SIG_new();
BN_bin2bn(&vchSig[1],32,sig->r);
@ -246,7 +275,12 @@ public:
EC_KEY_free(pkey);
pkey = EC_KEY_new_by_curve_name(NID_secp256k1);
if (ECDSA_SIG_recover_key_GFp(pkey, sig, (unsigned char*)&hash, sizeof(hash), vchSig[0] - 27, 0) == 1)
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);

36
src/keystore.cpp
View file

@ -29,8 +29,10 @@ bool CKeyStore::GetPubKey(const CBitcoinAddress &address, std::vector<unsigned c
bool CBasicKeyStore::AddKey(const CKey& key)
{
bool fCompressed = false;
CSecret secret = key.GetSecret(fCompressed);
CRITICAL_BLOCK(cs_KeyStore)
mapKeys[CBitcoinAddress(key.GetPubKey())] = key.GetSecret();
mapKeys[CBitcoinAddress(key.GetPubKey())] = make_pair(secret, fCompressed);
return true;
}
@ -77,16 +79,6 @@ bool CCryptoKeyStore::SetCrypted()
return true;
}
std::vector<unsigned char> CCryptoKeyStore::GenerateNewKey()
{
RandAddSeedPerfmon();
CKey key;
key.MakeNewKey();
if (!AddKey(key))
throw std::runtime_error("CCryptoKeyStore::GenerateNewKey() : AddKey failed");
return key.GetPubKey();
}
bool CCryptoKeyStore::Unlock(const CKeyingMaterial& vMasterKeyIn)
{
CRITICAL_BLOCK(cs_KeyStore)
@ -103,6 +95,7 @@ bool CCryptoKeyStore::Unlock(const CKeyingMaterial& vMasterKeyIn)
if(!DecryptSecret(vMasterKeyIn, vchCryptedSecret, Hash(vchPubKey.begin(), vchPubKey.end()), vchSecret))
return false;
CKey key;
key.SetPubKey(vchPubKey);
key.SetSecret(vchSecret);
if (key.GetPubKey() == vchPubKey)
break;
@ -125,7 +118,8 @@ bool CCryptoKeyStore::AddKey(const CKey& key)
std::vector<unsigned char> vchCryptedSecret;
std::vector<unsigned char> vchPubKey = key.GetPubKey();
if (!EncryptSecret(vMasterKey, key.GetSecret(), Hash(vchPubKey.begin(), vchPubKey.end()), vchCryptedSecret))
bool fCompressed;
if (!EncryptSecret(vMasterKey, key.GetSecret(fCompressed), Hash(vchPubKey.begin(), vchPubKey.end()), vchCryptedSecret))
return false;
if (!AddCryptedKey(key.GetPubKey(), vchCryptedSecret))
@ -147,19 +141,24 @@ bool CCryptoKeyStore::AddCryptedKey(const std::vector<unsigned char> &vchPubKey,
return true;
}
bool CCryptoKeyStore::GetSecret(const CBitcoinAddress &address, CSecret& vchSecretOut) const
bool CCryptoKeyStore::GetKey(const CBitcoinAddress &address, CKey& keyOut) const
{
CRITICAL_BLOCK(cs_KeyStore)
{
if (!IsCrypted())
return CBasicKeyStore::GetSecret(address, vchSecretOut);
return CBasicKeyStore::GetKey(address, keyOut);
CryptedKeyMap::const_iterator mi = mapCryptedKeys.find(address);
if (mi != mapCryptedKeys.end())
{
const std::vector<unsigned char> &vchPubKey = (*mi).second.first;
const std::vector<unsigned char> &vchCryptedSecret = (*mi).second.second;
return DecryptSecret(vMasterKey, vchCryptedSecret, Hash(vchPubKey.begin(), vchPubKey.end()), vchSecretOut);
CSecret vchSecret;
if (!DecryptSecret(vMasterKey, vchCryptedSecret, Hash(vchPubKey.begin(), vchPubKey.end()), vchSecret))
return false;
keyOut.SetPubKey(vchPubKey);
keyOut.SetSecret(vchSecret);
return true;
}
}
return false;
@ -190,14 +189,15 @@ bool CCryptoKeyStore::EncryptKeys(CKeyingMaterial& vMasterKeyIn)
return false;
fUseCrypto = true;
CKey key;
BOOST_FOREACH(KeyMap::value_type& mKey, mapKeys)
{
if (!key.SetSecret(mKey.second))
CKey key;
if (!key.SetSecret(mKey.second.first, false))
return false;
const std::vector<unsigned char> vchPubKey = key.GetPubKey();
std::vector<unsigned char> vchCryptedSecret;
if (!EncryptSecret(vMasterKeyIn, key.GetSecret(), Hash(vchPubKey.begin(), vchPubKey.end()), vchCryptedSecret))
bool fCompressed;
if (!EncryptSecret(vMasterKeyIn, key.GetSecret(fCompressed), Hash(vchPubKey.begin(), vchPubKey.end()), vchCryptedSecret))
return false;
if (!AddCryptedKey(vchPubKey, vchCryptedSecret))
return false;

24
src/keystore.h
View file

@ -20,15 +20,7 @@ public:
// Check whether a key corresponding to a given address is present in the store.
virtual bool HaveKey(const CBitcoinAddress &address) const =0;
virtual bool GetKey(const CBitcoinAddress &address, CKey& keyOut) const
{
CSecret vchSecret;
if (!GetSecret(address, vchSecret))
return false;
if (!keyOut.SetSecret(vchSecret))
return false;
return true;
}
virtual bool GetKey(const CBitcoinAddress &address, CKey& keyOut) const =0;
virtual void GetKeys(std::set<CBitcoinAddress> &setAddress) const =0;
virtual bool GetPubKey(const CBitcoinAddress &address, std::vector<unsigned char>& vchPubKeyOut) const;
@ -39,17 +31,17 @@ public:
// Generate a new key, and add it to the store
virtual std::vector<unsigned char> GenerateNewKey();
virtual bool GetSecret(const CBitcoinAddress &address, CSecret& vchSecret) const
virtual bool GetSecret(const CBitcoinAddress &address, CSecret& vchSecret, bool &fCompressed) const
{
CKey key;
if (!GetKey(address, key))
return false;
vchSecret = key.GetSecret();
vchSecret = key.GetSecret(fCompressed);
return true;
}
};
typedef std::map<CBitcoinAddress, CSecret> KeyMap;
typedef std::map<CBitcoinAddress, std::pair<CSecret, bool> > KeyMap;
typedef std::map<uint160, CScript > ScriptMap;
// Basic key store, that keeps keys in an address->secret map
@ -81,14 +73,15 @@ public:
}
}
}
bool GetSecret(const CBitcoinAddress &address, CSecret &vchSecret) const
bool GetKey(const CBitcoinAddress &address, CKey &keyOut) const
{
CRITICAL_BLOCK(cs_KeyStore)
{
KeyMap::const_iterator mi = mapKeys.find(address);
if (mi != mapKeys.end())
{
vchSecret = (*mi).second;
keyOut.Reset();
keyOut.SetSecret((*mi).second.first, (*mi).second.second);
return true;
}
}
@ -154,7 +147,6 @@ public:
}
virtual bool AddCryptedKey(const std::vector<unsigned char> &vchPubKey, const std::vector<unsigned char> &vchCryptedSecret);
std::vector<unsigned char> GenerateNewKey();
bool AddKey(const CKey& key);
bool HaveKey(const CBitcoinAddress &address) const
{
@ -166,7 +158,7 @@ public:
}
return false;
}
bool GetSecret(const CBitcoinAddress &address, CSecret& vchSecret) const;
bool GetKey(const CBitcoinAddress &address, CKey& keyOut) const;
bool GetPubKey(const CBitcoinAddress &address, std::vector<unsigned char>& vchPubKeyOut) const;
void GetKeys(std::set<CBitcoinAddress> &setAddress) const
{

9
src/rpcdump.cpp
View file

@ -62,7 +62,9 @@ Value importprivkey(const Array& params, bool fHelp)
if (!fGood) throw JSONRPCError(-5,"Invalid private key");
CKey key;
key.SetSecret(vchSecret.GetSecret());
bool fCompressed;
CSecret secret = vchSecret.GetSecret(fCompressed);
key.SetSecret(secret, fCompressed);
CBitcoinAddress vchAddress = CBitcoinAddress(key.GetPubKey());
CRITICAL_BLOCK(cs_main)
@ -95,7 +97,8 @@ Value dumpprivkey(const Array& params, bool fHelp)
if (!address.SetString(strAddress))
throw JSONRPCError(-5, "Invalid bitcoin address");
CSecret vchSecret;
if (!pwalletMain->GetSecret(address, vchSecret))
bool fCompressed;
if (!pwalletMain->GetSecret(address, vchSecret, fCompressed))
throw JSONRPCError(-4,"Private key for address " + strAddress + " is not known");
return CBitcoinSecret(vchSecret).ToString();
return CBitcoinSecret(vchSecret, fCompressed).ToString();
}

138
src/test/key_tests.cpp Normal file
View file

@ -0,0 +1,138 @@
#include <boost/test/unit_test.hpp>
#include <string>
#include <vector>
#include "key.h"
#include "base58.h"
#include "uint256.h"
#include "util.h"
using namespace std;
static const string strSecret1 ("5HxWvvfubhXpYYpS3tJkw6fq9jE9j18THftkZjHHfmFiWtmAbrj");
static const string strSecret2 ("5KC4ejrDjv152FGwP386VD1i2NYc5KkfSMyv1nGy1VGDxGHqVY3");
static const string strSecret1C("Kwr371tjA9u2rFSMZjTNun2PXXP3WPZu2afRHTcta6KxEUdm1vEw");
static const string strSecret2C("L3Hq7a8FEQwJkW1M2GNKDW28546Vp5miewcCzSqUD9kCAXrJdS3g");
#ifdef KEY_TESTS_DUMPINFO
void dumpKeyInfo(uint256 privkey)
{
CSecret secret;
secret.resize(32);
memcpy(&secret[0], &privkey, 32);
vector<unsigned char> sec;
sec.resize(32);
memcpy(&sec[0], &secret[0], 32);
printf(" * secret (hex): %s\n", HexStr(sec).c_str());
for (int nCompressed=0; nCompressed<2; nCompressed++)
{
bool fCompressed = nCompressed == 1;
printf(" * %s:\n", fCompressed ? "compressed" : "uncompressed");
CBitcoinSecret bsecret;
bsecret.SetSecret(secret, fCompressed);
printf(" * secret (base58): %s\n", bsecret.ToString().c_str());
CKey key;
key.SetSecret(secret, fCompressed);
vector<unsigned char> vchPubKey = key.GetPubKey();
printf(" * pubkey (hex): %s\n", HexStr(vchPubKey).c_str());
printf(" * address (base58): %s\n", CBitcoinAddress(vchPubKey).ToString().c_str());
}
}
#endif
BOOST_AUTO_TEST_SUITE(key_tests)
BOOST_AUTO_TEST_CASE(key_test1)
{
CBitcoinSecret bsecret1, bsecret2, bsecret1C, bsecret2C;
bsecret1.SetString (strSecret1);
bsecret2.SetString (strSecret2);
bsecret1C.SetString(strSecret1C);
bsecret2C.SetString(strSecret2C);
bool fCompressed;
CSecret secret1 = bsecret1.GetSecret (fCompressed);
BOOST_CHECK(fCompressed == false);
CSecret secret2 = bsecret2.GetSecret (fCompressed);
BOOST_CHECK(fCompressed == false);
CSecret secret1C = bsecret1C.GetSecret(fCompressed);
BOOST_CHECK(fCompressed == true);
CSecret secret2C = bsecret2C.GetSecret(fCompressed);
BOOST_CHECK(fCompressed == true);
BOOST_CHECK(secret1 == secret1C);
BOOST_CHECK(secret2 == secret2C);
CKey key1, key2, key1C, key2C;
key1.SetSecret(secret1, false);
key2.SetSecret(secret2, false);
key1C.SetSecret(secret1, true);
key2C.SetSecret(secret2, true);
BOOST_CHECK(CBitcoinAddress(key1.GetPubKey ()).ToString() == "1QFqqMUD55ZV3PJEJZtaKCsQmjLT6JkjvJ");
BOOST_CHECK(CBitcoinAddress(key2.GetPubKey ()).ToString() == "1F5y5E5FMc5YzdJtB9hLaUe43GDxEKXENJ");
BOOST_CHECK(CBitcoinAddress(key1C.GetPubKey()).ToString() == "1NoJrossxPBKfCHuJXT4HadJrXRE9Fxiqs");
BOOST_CHECK(CBitcoinAddress(key2C.GetPubKey()).ToString() == "1CRj2HyM1CXWzHAXLQtiGLyggNT9WQqsDs");
for (int n=0; n<16; n++)
{
string strMsg = strprintf("Very secret message %i: 11", n);
uint256 hashMsg = Hash(strMsg.begin(), strMsg.end());
// normal signatures
vector<unsigned char> sign1, sign2, sign1C, sign2C;
BOOST_CHECK(key1.Sign (hashMsg, sign1));
BOOST_CHECK(key2.Sign (hashMsg, sign2));
BOOST_CHECK(key1C.Sign(hashMsg, sign1C));
BOOST_CHECK(key2C.Sign(hashMsg, sign2C));
BOOST_CHECK( key1.Verify(hashMsg, sign1));
BOOST_CHECK(!key1.Verify(hashMsg, sign2));
BOOST_CHECK( key1.Verify(hashMsg, sign1C));
BOOST_CHECK(!key1.Verify(hashMsg, sign2C));
BOOST_CHECK(!key2.Verify(hashMsg, sign1));
BOOST_CHECK( key2.Verify(hashMsg, sign2));
BOOST_CHECK(!key2.Verify(hashMsg, sign1C));
BOOST_CHECK( key2.Verify(hashMsg, sign2C));
BOOST_CHECK( key1C.Verify(hashMsg, sign1));
BOOST_CHECK(!key1C.Verify(hashMsg, sign2));
BOOST_CHECK( key1C.Verify(hashMsg, sign1C));
BOOST_CHECK(!key1C.Verify(hashMsg, sign2C));
BOOST_CHECK(!key2C.Verify(hashMsg, sign1));
BOOST_CHECK( key2C.Verify(hashMsg, sign2));
BOOST_CHECK(!key2C.Verify(hashMsg, sign1C));
BOOST_CHECK( key2C.Verify(hashMsg, sign2C));
// compact signatures (with key recovery)
vector<unsigned char> csign1, csign2, csign1C, csign2C;
BOOST_CHECK(key1.SignCompact (hashMsg, csign1));
BOOST_CHECK(key2.SignCompact (hashMsg, csign2));
BOOST_CHECK(key1C.SignCompact(hashMsg, csign1C));
BOOST_CHECK(key2C.SignCompact(hashMsg, csign2C));
CKey rkey1, rkey2, rkey1C, rkey2C;
BOOST_CHECK(rkey1.SetCompactSignature (hashMsg, csign1));
BOOST_CHECK(rkey2.SetCompactSignature (hashMsg, csign2));
BOOST_CHECK(rkey1C.SetCompactSignature(hashMsg, csign1C));
BOOST_CHECK(rkey2C.SetCompactSignature(hashMsg, csign2C));
BOOST_CHECK(rkey1.GetPubKey() == key1.GetPubKey());
BOOST_CHECK(rkey2.GetPubKey() == key2.GetPubKey());
BOOST_CHECK(rkey1C.GetPubKey() == key1C.GetPubKey());
BOOST_CHECK(rkey2C.GetPubKey() == key2C.GetPubKey());
}
}
BOOST_AUTO_TEST_SUITE_END()