diff options
Diffstat (limited to 'src/key.cpp')
| -rw-r--r-- | src/key.cpp | 43 |
1 files changed, 33 insertions, 10 deletions
diff --git a/src/key.cpp b/src/key.cpp index 85dc9cda2..414845a9d 100644 --- a/src/key.cpp +++ b/src/key.cpp @@ -166,9 +166,12 @@ public: assert(nSize == nSize2); } - bool SetPrivKey(const CPrivKey &privkey) { + bool SetPrivKey(const CPrivKey &privkey, bool fSkipCheck=false) { const unsigned char* pbegin = &privkey[0]; if (d2i_ECPrivateKey(&pkey, &pbegin, privkey.size())) { + if(fSkipCheck) + return true; + // d2i_ECPrivateKey returns true if parsing succeeds. // This doesn't necessarily mean the key is valid. if (EC_KEY_check_key(pkey)) @@ -199,17 +202,19 @@ public: ECDSA_SIG *sig = ECDSA_do_sign((unsigned char*)&hash, sizeof(hash), pkey); if (sig == NULL) return false; - if (BN_is_odd(sig->s)) { - // enforce even S values, by negating the value (modulo the order) if odd - BN_CTX *ctx = BN_CTX_new(); - BN_CTX_start(ctx); - const EC_GROUP *group = EC_KEY_get0_group(pkey); - BIGNUM *order = BN_CTX_get(ctx); - EC_GROUP_get_order(group, order, ctx); + BN_CTX *ctx = BN_CTX_new(); + BN_CTX_start(ctx); + const EC_GROUP *group = EC_KEY_get0_group(pkey); + BIGNUM *order = BN_CTX_get(ctx); + BIGNUM *halforder = BN_CTX_get(ctx); + EC_GROUP_get_order(group, order, ctx); + BN_rshift1(halforder, order); + if (BN_cmp(sig->s, halforder) > 0) { + // enforce low S values, by negating the value (modulo the order) if above order/2. BN_sub(sig->s, order, sig->s); - BN_CTX_end(ctx); - BN_CTX_free(ctx); } + BN_CTX_end(ctx); + BN_CTX_free(ctx); unsigned int nSize = ECDSA_size(pkey); vchSig.resize(nSize); // Make sure it is big enough unsigned char *pos = &vchSig[0]; @@ -409,6 +414,24 @@ bool CKey::SignCompact(const uint256 &hash, std::vector<unsigned char>& vchSig) return true; } +bool CKey::Load(CPrivKey &privkey, CPubKey &vchPubKey, bool fSkipCheck=false) { + CECKey key; + if (!key.SetPrivKey(privkey, fSkipCheck)) + return false; + + key.GetSecretBytes(vch); + fCompressed = vchPubKey.IsCompressed(); + fValid = true; + + if (fSkipCheck) + return true; + + if (GetPubKey() != vchPubKey) + return false; + + return true; +} + bool CPubKey::Verify(const uint256 &hash, const std::vector<unsigned char>& vchSig) const { if (!IsValid()) return false; |