diff options
| author | Matt Corallo <matt@bluematt.me> | 2011-06-28 15:31:09 +0200 |
|---|---|---|
| committer | Matt Corallo <matt@bluematt.me> | 2011-07-13 02:11:25 +0200 |
| commit | ddebdd9a8fb118caca4f981f6641696c1c227f02 (patch) | |
| tree | d0997a6a3e9ad6cf52550f763fa2490c67499d6c | |
| parent | 4e87d341f75f13bbd7d108c31c03886fbc4df56f (diff) | |
Set the number of SHA512 rounds based on the speed of the computer.
| -rw-r--r-- | src/wallet.cpp | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/src/wallet.cpp b/src/wallet.cpp index c3d793d379..216ddc4034 100644 --- a/src/wallet.cpp +++ b/src/wallet.cpp @@ -75,6 +75,19 @@ bool CWallet::ChangeWalletPassphrase(const string& strOldWalletPassphrase, const return false; if (CCryptoKeyStore::Unlock(vMasterKey)) { + int64 nStartTime = GetTimeMillis(); + crypter.SetKeyFromPassphrase(strNewWalletPassphrase, pMasterKey.second.vchSalt, pMasterKey.second.nDeriveIterations, pMasterKey.second.nDerivationMethod); + pMasterKey.second.nDeriveIterations = pMasterKey.second.nDeriveIterations * (100 / ((double)(GetTimeMillis() - nStartTime))); + + nStartTime = GetTimeMillis(); + crypter.SetKeyFromPassphrase(strNewWalletPassphrase, pMasterKey.second.vchSalt, pMasterKey.second.nDeriveIterations, pMasterKey.second.nDerivationMethod); + pMasterKey.second.nDeriveIterations = (pMasterKey.second.nDeriveIterations + pMasterKey.second.nDeriveIterations * 100 / ((double)(GetTimeMillis() - nStartTime))) / 2; + + if (pMasterKey.second.nDeriveIterations < 25000) + pMasterKey.second.nDeriveIterations = 25000; + + printf("Wallet passphrase changed to an nDeriveIterations of %i\n", pMasterKey.second.nDeriveIterations); + if (!crypter.SetKeyFromPassphrase(strNewWalletPassphrase, pMasterKey.second.vchSalt, pMasterKey.second.nDeriveIterations, pMasterKey.second.nDerivationMethod)) return false; if (!crypter.Encrypt(vMasterKey, pMasterKey.second.vchCryptedKey)) @@ -112,6 +125,19 @@ bool CWallet::EncryptWallet(const string& strWalletPassphrase) RAND_bytes(&kMasterKey.vchSalt[0], WALLET_CRYPTO_SALT_SIZE); CCrypter crypter; + int64 nStartTime = GetTimeMillis(); + crypter.SetKeyFromPassphrase(strWalletPassphrase, kMasterKey.vchSalt, 25000, kMasterKey.nDerivationMethod); + kMasterKey.nDeriveIterations = 2500000 / ((double)(GetTimeMillis() - nStartTime)); + + nStartTime = GetTimeMillis(); + crypter.SetKeyFromPassphrase(strWalletPassphrase, kMasterKey.vchSalt, kMasterKey.nDeriveIterations, kMasterKey.nDerivationMethod); + kMasterKey.nDeriveIterations = (kMasterKey.nDeriveIterations + kMasterKey.nDeriveIterations * 100 / ((double)(GetTimeMillis() - nStartTime))) / 2; + + if (kMasterKey.nDeriveIterations < 25000) + kMasterKey.nDeriveIterations = 25000; + + printf("Encrypting Wallet with an nDeriveIterations of %i\n", kMasterKey.nDeriveIterations); + if (!crypter.SetKeyFromPassphrase(strWalletPassphrase, kMasterKey.vchSalt, kMasterKey.nDeriveIterations, kMasterKey.nDerivationMethod)) return false; if (!crypter.Encrypt(vMasterKey, kMasterKey.vchCryptedKey)) |