Browse Source

crypter: fix the stored initialization vector size

AES IV's are 16bytes, not 32. This was harmless but confusing.

Add WALLET_CRYPTO_IV_SIZE to make its usage explicit.
0.13
Cory Fields 10 years ago committed by Pieter Wuille
parent
commit
1c391a5866
  1. 10
      src/wallet/crypter.cpp
  2. 3
      src/wallet/crypter.h

10
src/wallet/crypter.cpp

@ -37,7 +37,7 @@ bool CCrypter::SetKeyFromPassphrase(const SecureString& strKeyData, const std::v @@ -37,7 +37,7 @@ bool CCrypter::SetKeyFromPassphrase(const SecureString& strKeyData, const std::v
bool CCrypter::SetKey(const CKeyingMaterial& chNewKey, const std::vector<unsigned char>& chNewIV)
{
if (chNewKey.size() != WALLET_CRYPTO_KEY_SIZE || chNewIV.size() != WALLET_CRYPTO_KEY_SIZE)
if (chNewKey.size() != WALLET_CRYPTO_KEY_SIZE || chNewIV.size() != WALLET_CRYPTO_IV_SIZE)
return false;
memcpy(&chKey[0], &chNewKey[0], sizeof chKey);
@ -105,8 +105,8 @@ bool CCrypter::Decrypt(const std::vector<unsigned char>& vchCiphertext, CKeyingM @@ -105,8 +105,8 @@ bool CCrypter::Decrypt(const std::vector<unsigned char>& vchCiphertext, CKeyingM
static bool EncryptSecret(const CKeyingMaterial& vMasterKey, const CKeyingMaterial &vchPlaintext, const uint256& nIV, std::vector<unsigned char> &vchCiphertext)
{
CCrypter cKeyCrypter;
std::vector<unsigned char> chIV(WALLET_CRYPTO_KEY_SIZE);
memcpy(&chIV[0], &nIV, WALLET_CRYPTO_KEY_SIZE);
std::vector<unsigned char> chIV(WALLET_CRYPTO_IV_SIZE);
memcpy(&chIV[0], &nIV, WALLET_CRYPTO_IV_SIZE);
if(!cKeyCrypter.SetKey(vMasterKey, chIV))
return false;
return cKeyCrypter.Encrypt(*((const CKeyingMaterial*)&vchPlaintext), vchCiphertext);
@ -115,8 +115,8 @@ static bool EncryptSecret(const CKeyingMaterial& vMasterKey, const CKeyingMateri @@ -115,8 +115,8 @@ static bool EncryptSecret(const CKeyingMaterial& vMasterKey, const CKeyingMateri
static bool DecryptSecret(const CKeyingMaterial& vMasterKey, const std::vector<unsigned char>& vchCiphertext, const uint256& nIV, CKeyingMaterial& vchPlaintext)
{
CCrypter cKeyCrypter;
std::vector<unsigned char> chIV(WALLET_CRYPTO_KEY_SIZE);
memcpy(&chIV[0], &nIV, WALLET_CRYPTO_KEY_SIZE);
std::vector<unsigned char> chIV(WALLET_CRYPTO_IV_SIZE);
memcpy(&chIV[0], &nIV, WALLET_CRYPTO_IV_SIZE);
if(!cKeyCrypter.SetKey(vMasterKey, chIV))
return false;
return cKeyCrypter.Decrypt(vchCiphertext, *((CKeyingMaterial*)&vchPlaintext));

3
src/wallet/crypter.h

@ -13,6 +13,7 @@ class uint256; @@ -13,6 +13,7 @@ class uint256;
const unsigned int WALLET_CRYPTO_KEY_SIZE = 32;
const unsigned int WALLET_CRYPTO_SALT_SIZE = 8;
const unsigned int WALLET_CRYPTO_IV_SIZE = 16;
/**
* Private key encryption is done based on a CMasterKey,
@ -71,7 +72,7 @@ class CCrypter @@ -71,7 +72,7 @@ class CCrypter
{
private:
unsigned char chKey[WALLET_CRYPTO_KEY_SIZE];
unsigned char chIV[WALLET_CRYPTO_KEY_SIZE];
unsigned char chIV[WALLET_CRYPTO_IV_SIZE];
bool fKeySet;
public:

Loading…
Cancel
Save