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Add GetSecret() and GetKeys() to CKeyStore

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This commit is contained in:
Pieter Wuille 2011-07-11 21:30:40 +02:00 committed by Pieter Wuille
parent 4c6e22953e
commit 93db3fceac
9 changed files with 177 additions and 136 deletions
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1
bitcoin-qt.pro
View File

@ -148,6 +148,7 @@ SOURCES += src/qt/bitcoin.cpp src/qt/bitcoingui.cpp \
src/qt/editaddressdialog.cpp \
src/qt/bitcoinaddressvalidator.cpp \
src/util.cpp \
src/key.cpp \
src/script.cpp \
src/main.cpp \
src/init.cpp \

2
src/bitcoinrpc.cpp
View File

@ -595,7 +595,7 @@ Value verifymessage(const Array& params, bool fHelp)
if (!key.SetCompactSignature(Hash(ss.begin(), ss.end()), vchSig))
return false;
return (key.GetAddress() == addr);
return (CBitcoinAddress(key.GetPubKey()) == addr);
}

117
src/key.cpp Normal file
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@ -0,0 +1,117 @@
// Copyright (c) 2011 The Bitcoin developers
// Distributed under the MIT/X11 software license, see the accompanying
// file license.txt or http://www.opensource.org/licenses/mit-license.php.
#include <openssl/ec.h>
#include <openssl/ecdsa.h>
// Generate a private key from just the secret parameter
int EC_KEY_regenerate_key(EC_KEY *eckey, BIGNUM *priv_key)
{
int ok = 0;
BN_CTX *ctx = NULL;
EC_POINT *pub_key = NULL;
if (!eckey) return 0;
const EC_GROUP *group = EC_KEY_get0_group(eckey);
if ((ctx = BN_CTX_new()) == NULL)
goto err;
pub_key = EC_POINT_new(group);
if (pub_key == NULL)
goto err;
if (!EC_POINT_mul(group, pub_key, priv_key, NULL, NULL, ctx))
goto err;
EC_KEY_set_private_key(eckey,priv_key);
EC_KEY_set_public_key(eckey,pub_key);
ok = 1;
err:
if (pub_key)
EC_POINT_free(pub_key);
if (ctx != NULL)
BN_CTX_free(ctx);
return(ok);
}
// Perform ECDSA key recovery (see SEC1 4.1.6) for curves over (mod p)-fields
// recid selects which key is recovered
// if check is nonzero, additional checks are performed
int ECDSA_SIG_recover_key_GFp(EC_KEY *eckey, ECDSA_SIG *ecsig, const unsigned char *msg, int msglen, int recid, int check)
{
if (!eckey) return 0;
int ret = 0;
BN_CTX *ctx = NULL;
BIGNUM *x = NULL;
BIGNUM *e = NULL;
BIGNUM *order = NULL;
BIGNUM *sor = NULL;
BIGNUM *eor = NULL;
BIGNUM *field = NULL;
EC_POINT *R = NULL;
EC_POINT *O = NULL;
EC_POINT *Q = NULL;
BIGNUM *rr = NULL;
BIGNUM *zero = NULL;
int n = 0;
int i = recid / 2;
const EC_GROUP *group = EC_KEY_get0_group(eckey);
if ((ctx = BN_CTX_new()) == NULL) { ret = -1; goto err; }
BN_CTX_start(ctx);
order = BN_CTX_get(ctx);
if (!EC_GROUP_get_order(group, order, ctx)) { ret = -2; goto err; }
x = BN_CTX_get(ctx);
if (!BN_copy(x, order)) { ret=-1; goto err; }
if (!BN_mul_word(x, i)) { ret=-1; goto err; }
if (!BN_add(x, x, ecsig->r)) { ret=-1; goto err; }
field = BN_CTX_get(ctx);
if (!EC_GROUP_get_curve_GFp(group, field, NULL, NULL, ctx)) { ret=-2; goto err; }
if (BN_cmp(x, field) >= 0) { ret=0; goto err; }
if ((R = EC_POINT_new(group)) == NULL) { ret = -2; goto err; }
if (!EC_POINT_set_compressed_coordinates_GFp(group, R, x, recid % 2, ctx)) { ret=0; goto err; }
if (check)
{
if ((O = EC_POINT_new(group)) == NULL) { ret = -2; goto err; }
if (!EC_POINT_mul(group, O, NULL, R, order, ctx)) { ret=-2; goto err; }
if (!EC_POINT_is_at_infinity(group, O)) { ret = 0; goto err; }
}
if ((Q = EC_POINT_new(group)) == NULL) { ret = -2; goto err; }
n = EC_GROUP_get_degree(group);
e = BN_CTX_get(ctx);
if (!BN_bin2bn(msg, msglen, e)) { ret=-1; goto err; }
if (8*msglen > n) BN_rshift(e, e, 8-(n & 7));
zero = BN_CTX_get(ctx);
if (!BN_zero(zero)) { ret=-1; goto err; }
if (!BN_mod_sub(e, zero, e, order, ctx)) { ret=-1; goto err; }
rr = BN_CTX_get(ctx);
if (!BN_mod_inverse(rr, ecsig->r, order, ctx)) { ret=-1; goto err; }
sor = BN_CTX_get(ctx);
if (!BN_mod_mul(sor, ecsig->s, rr, order, ctx)) { ret=-1; goto err; }
eor = BN_CTX_get(ctx);
if (!BN_mod_mul(eor, e, rr, order, ctx)) { ret=-1; goto err; }
if (!EC_POINT_mul(group, Q, eor, R, sor, ctx)) { ret=-2; goto err; }
if (!EC_KEY_set_public_key(eckey, Q)) { ret=-2; goto err; }
ret = 1;
err:
if (ctx) {
BN_CTX_end(ctx);
BN_CTX_free(ctx);
}
if (R != NULL) EC_POINT_free(R);
if (O != NULL) EC_POINT_free(O);
if (Q != NULL) EC_POINT_free(Q);
return ret;
}

119
src/key.h
View File

@ -14,7 +14,6 @@
#include "serialize.h"
#include "uint256.h"
#include "base58.h"
// secp160k1
// const unsigned int PRIVATE_KEY_SIZE = 192;
@ -39,116 +38,8 @@
// see www.keylength.com
// script supports up to 75 for single byte push
// Generate a private key from just the secret parameter
int static inline EC_KEY_regenerate_key(EC_KEY *eckey, BIGNUM *priv_key)
{
int ok = 0;
BN_CTX *ctx = NULL;
EC_POINT *pub_key = NULL;
if (!eckey) return 0;
const EC_GROUP *group = EC_KEY_get0_group(eckey);
if ((ctx = BN_CTX_new()) == NULL)
goto err;
pub_key = EC_POINT_new(group);
if (pub_key == NULL)
goto err;
if (!EC_POINT_mul(group, pub_key, priv_key, NULL, NULL, ctx))
goto err;
EC_KEY_set_private_key(eckey,priv_key);
EC_KEY_set_public_key(eckey,pub_key);
ok = 1;
err:
if (pub_key)
EC_POINT_free(pub_key);
if (ctx != NULL)
BN_CTX_free(ctx);
return(ok);
}
// Perform ECDSA key recovery (see SEC1 4.1.6) for curves over (mod p)-fields
// recid selects which key is recovered
// if check is nonzero, additional checks are performed
int static inline ECDSA_SIG_recover_key_GFp(EC_KEY *eckey, ECDSA_SIG *ecsig, const unsigned char *msg, int msglen, int recid, int check)
{
if (!eckey) return 0;
int ret = 0;
BN_CTX *ctx = NULL;
BIGNUM *x = NULL;
BIGNUM *e = NULL;
BIGNUM *order = NULL;
BIGNUM *sor = NULL;
BIGNUM *eor = NULL;
BIGNUM *field = NULL;
EC_POINT *R = NULL;
EC_POINT *O = NULL;
EC_POINT *Q = NULL;
BIGNUM *rr = NULL;
BIGNUM *zero = NULL;
int n = 0;
int i = recid / 2;
const EC_GROUP *group = EC_KEY_get0_group(eckey);
if ((ctx = BN_CTX_new()) == NULL) { ret = -1; goto err; }
BN_CTX_start(ctx);
order = BN_CTX_get(ctx);
if (!EC_GROUP_get_order(group, order, ctx)) { ret = -2; goto err; }
x = BN_CTX_get(ctx);
if (!BN_copy(x, order)) { ret=-1; goto err; }
if (!BN_mul_word(x, i)) { ret=-1; goto err; }
if (!BN_add(x, x, ecsig->r)) { ret=-1; goto err; }
field = BN_CTX_get(ctx);
if (!EC_GROUP_get_curve_GFp(group, field, NULL, NULL, ctx)) { ret=-2; goto err; }
if (BN_cmp(x, field) >= 0) { ret=0; goto err; }
if ((R = EC_POINT_new(group)) == NULL) { ret = -2; goto err; }
if (!EC_POINT_set_compressed_coordinates_GFp(group, R, x, recid % 2, ctx)) { ret=0; goto err; }
if (check)
{
if ((O = EC_POINT_new(group)) == NULL) { ret = -2; goto err; }
if (!EC_POINT_mul(group, O, NULL, R, order, ctx)) { ret=-2; goto err; }
if (!EC_POINT_is_at_infinity(group, O)) { ret = 0; goto err; }
}
if ((Q = EC_POINT_new(group)) == NULL) { ret = -2; goto err; }
n = EC_GROUP_get_degree(group);
e = BN_CTX_get(ctx);
if (!BN_bin2bn(msg, msglen, e)) { ret=-1; goto err; }
if (8*msglen > n) BN_rshift(e, e, 8-(n & 7));
zero = BN_CTX_get(ctx);
if (!BN_zero(zero)) { ret=-1; goto err; }
if (!BN_mod_sub(e, zero, e, order, ctx)) { ret=-1; goto err; }
rr = BN_CTX_get(ctx);
if (!BN_mod_inverse(rr, ecsig->r, order, ctx)) { ret=-1; goto err; }
sor = BN_CTX_get(ctx);
if (!BN_mod_mul(sor, ecsig->s, rr, order, ctx)) { ret=-1; goto err; }
eor = BN_CTX_get(ctx);
if (!BN_mod_mul(eor, e, rr, order, ctx)) { ret=-1; goto err; }
if (!EC_POINT_mul(group, Q, eor, R, sor, ctx)) { ret=-2; goto err; }
if (!EC_KEY_set_public_key(eckey, Q)) { ret=-2; goto err; }
ret = 1;
err:
if (ctx) {
BN_CTX_end(ctx);
BN_CTX_free(ctx);
}
if (R != NULL) EC_POINT_free(R);
if (O != NULL) EC_POINT_free(O);
if (Q != NULL) EC_POINT_free(Q);
return ret;
}
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
{
@ -381,12 +272,6 @@ public:
return false;
return true;
}
// Get the address corresponding to this key
CBitcoinAddress GetAddress() const
{
return CBitcoinAddress(GetPubKey());
}
};
#endif

12
src/keystore.cpp
View File

@ -29,7 +29,7 @@ bool CKeyStore::GetPubKey(const CBitcoinAddress &address, std::vector<unsigned c
bool CBasicKeyStore::AddKey(const CKey& key)
{
CRITICAL_BLOCK(cs_KeyStore)
mapKeys[key.GetAddress()] = key.GetSecret();
mapKeys[CBitcoinAddress(key.GetPubKey())] = key.GetSecret();
return true;
}
@ -116,23 +116,19 @@ bool CCryptoKeyStore::AddCryptedKey(const std::vector<unsigned char> &vchPubKey,
return true;
}
bool CCryptoKeyStore::GetKey(const CBitcoinAddress &address, CKey& keyOut) const
bool CCryptoKeyStore::GetSecret(const CBitcoinAddress &address, CSecret& vchSecretOut) const
{
CRITICAL_BLOCK(cs_KeyStore)
{
if (!IsCrypted())
return CBasicKeyStore::GetKey(address, keyOut);
return CBasicKeyStore::GetSecret(address, vchSecretOut);
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;
CSecret vchSecret;
if (!DecryptSecret(vMasterKey, vchCryptedSecret, Hash(vchPubKey.begin(), vchPubKey.end()), vchSecret))
return false;
keyOut.SetSecret(vchSecret);
return true;
return DecryptSecret(vMasterKey, vchCryptedSecret, Hash(vchPubKey.begin(), vchPubKey.end()), vchSecretOut);
}
}
return false;

59
src/keystore.h
View File

@ -19,17 +19,28 @@ public:
// Check whether a key corresponding to a given address is present in the store.
virtual bool HaveKey(const CBitcoinAddress &address) const =0;
// Retrieve a key corresponding to a given address from the store.
// Return true if succesful.
virtual bool GetKey(const CBitcoinAddress &address, CKey& keyOut) const =0;
// Retrieve only the public key corresponding to a given address.
// This may succeed even if GetKey fails (e.g., encrypted wallets)
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 void GetKeys(std::set<CBitcoinAddress> &setAddress) const =0;
virtual bool GetPubKey(const CBitcoinAddress &address, std::vector<unsigned char>& vchPubKeyOut) const;
// 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
{
CKey key;
if (!GetKey(address, key))
return false;
vchSecret = key.GetSecret();
return true;
}
};
typedef std::map<CBitcoinAddress, CSecret> KeyMap;
@ -49,14 +60,27 @@ public:
result = (mapKeys.count(address) > 0);
return result;
}
bool GetKey(const CBitcoinAddress &address, CKey& keyOut) const
void GetKeys(std::set<CBitcoinAddress> &setAddress) const
{
setAddress.clear();
CRITICAL_BLOCK(cs_KeyStore)
{
KeyMap::const_iterator mi = mapKeys.begin();
while (mi != mapKeys.end())
{
setAddress.insert((*mi).first);
mi++;
}
}
}
bool GetSecret(const CBitcoinAddress &address, CSecret &vchSecret) const
{
CRITICAL_BLOCK(cs_KeyStore)
{
KeyMap::const_iterator mi = mapKeys.find(address);
if (mi != mapKeys.end())
{
keyOut.SetSecret((*mi).second);
vchSecret = (*mi).second;
return true;
}
}
@ -131,8 +155,23 @@ public:
}
return false;
}
bool GetKey(const CBitcoinAddress &address, CKey& keyOut) const;
bool GetSecret(const CBitcoinAddress &address, CSecret& vchSecret) const;
bool GetPubKey(const CBitcoinAddress &address, std::vector<unsigned char>& vchPubKeyOut) const;
void GetKeys(std::set<CBitcoinAddress> &setAddress) const
{
if (!IsCrypted())
{
CBasicKeyStore::GetKeys(setAddress);
return;
}
setAddress.clear();
CryptedKeyMap::const_iterator mi = mapCryptedKeys.begin();
while (mi != mapCryptedKeys.end())
{
setAddress.insert((*mi).first);
mi++;
}
}
};
#endif

1
src/makefile.mingw
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@ -61,6 +61,7 @@ LIBS += -l kernel32 -l user32 -l gdi32 -l comdlg32 -l winspool -l winmm -l shell
OBJS= \
obj/checkpoints.o \
obj/crypter.o \
obj/key.o \
obj/db.o \
obj/init.o \
obj/irc.o \

1
src/makefile.osx
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@ -72,6 +72,7 @@ HEADERS = \
OBJS= \
obj/checkpoints.o \
obj/crypter.o \
obj/key.o \
obj/db.o \
obj/init.o \
obj/irc.o \

1
src/makefile.unix
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@ -110,6 +110,7 @@ HEADERS = \
OBJS= \
obj/checkpoints.o \
obj/crypter.o \
obj/key.o \
obj/db.o \
obj/init.o \
obj/irc.o \