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Merge pull request #1306

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8aba0d4 wallet: encrypt outputs and key images files with the view key (moneromooo-monero)
This commit is contained in:
Riccardo Spagni
2016-11-08 22:55:56 +02:00
parent 7c7a6cf2f8 8aba0d4b4c
commit 18fdd8116e
3 changed files with 104 additions and 14 deletions
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55
src/wallet/wallet2.cpp
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@@ -4443,6 +4443,61 @@ size_t wallet2::import_outputs(const std::vector<tools::wallet2::transfer_detail
return m_transfers.size();
}
//----------------------------------------------------------------------------------------------------
std::string wallet2::encrypt(const std::string &plaintext, const crypto::secret_key &skey, bool authenticated) const
{
crypto::chacha8_key key;
crypto::generate_chacha8_key(&skey, sizeof(skey), key);
std::string ciphertext;
crypto::chacha8_iv iv = crypto::rand<crypto::chacha8_iv>();
ciphertext.resize(plaintext.size() + sizeof(iv) + (authenticated ? sizeof(crypto::signature) : 0));
crypto::chacha8(plaintext.data(), plaintext.size(), key, iv, &ciphertext[sizeof(iv)]);
memcpy(&ciphertext[0], &iv, sizeof(iv));
if (authenticated)
{
crypto::hash hash;
crypto::cn_fast_hash(ciphertext.data(), ciphertext.size() - sizeof(signature), hash);
crypto::public_key pkey;
crypto::secret_key_to_public_key(skey, pkey);
crypto::signature &signature = *(crypto::signature*)&ciphertext[ciphertext.size() - sizeof(crypto::signature)];
crypto::generate_signature(hash, pkey, skey, signature);
}
return std::move(ciphertext);
}
//----------------------------------------------------------------------------------------------------
std::string wallet2::encrypt_with_view_secret_key(const std::string &plaintext, bool authenticated) const
{
return encrypt(plaintext, get_account().get_keys().m_view_secret_key, authenticated);
}
//----------------------------------------------------------------------------------------------------
std::string wallet2::decrypt(const std::string &ciphertext, const crypto::secret_key &skey, bool authenticated) const
{
THROW_WALLET_EXCEPTION_IF(ciphertext.size() < sizeof(chacha8_iv),
error::wallet_internal_error, "key_image generated ephemeral public key not matched with output_key");
crypto::chacha8_key key;
crypto::generate_chacha8_key(&skey, sizeof(skey), key);
const crypto::chacha8_iv &iv = *(const crypto::chacha8_iv*)&ciphertext[0];
std::string plaintext;
plaintext.resize(ciphertext.size() - sizeof(iv) - (authenticated ? sizeof(crypto::signature) : 0));
if (authenticated)
{
crypto::hash hash;
crypto::cn_fast_hash(ciphertext.data(), ciphertext.size() - sizeof(signature), hash);
crypto::public_key pkey;
crypto::secret_key_to_public_key(skey, pkey);
const crypto::signature &signature = *(const crypto::signature*)&ciphertext[ciphertext.size() - sizeof(crypto::signature)];
THROW_WALLET_EXCEPTION_IF(!crypto::check_signature(hash, pkey, signature),
error::wallet_internal_error, "Failed to authenticate criphertext");
}
crypto::chacha8(ciphertext.data() + sizeof(iv), ciphertext.size() - sizeof(iv), key, iv, &plaintext[0]);
return std::move(plaintext);
}
//----------------------------------------------------------------------------------------------------
std::string wallet2::decrypt_with_view_secret_key(const std::string &ciphertext, bool authenticated) const
{
return decrypt(ciphertext, get_account().get_keys().m_view_secret_key, authenticated);
}
//----------------------------------------------------------------------------------------------------
void wallet2::generate_genesis(cryptonote::block& b) {
if (m_testnet)
{