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Hash domain separation

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This commit is contained in:
Sarang Noether 2020-04-01 08:31:00 -04:00
parent 6c7d928f19
commit 80d5320fff
9 changed files with 34 additions and 34 deletions
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6
src/cryptonote_basic/account.cpp
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@ -40,13 +40,11 @@ extern "C"
}
#include "cryptonote_basic_impl.h"
#include "cryptonote_format_utils.h"
#include "cryptonote_config.h"
#undef MONERO_DEFAULT_LOG_CATEGORY
#define MONERO_DEFAULT_LOG_CATEGORY "account"
#define KEYS_ENCRYPTION_SALT 'k'
using namespace std;
DISABLE_VS_WARNINGS(4244 4345)
@ -69,7 +67,7 @@ DISABLE_VS_WARNINGS(4244 4345)
static_assert(sizeof(base_key) == sizeof(crypto::hash), "chacha key and hash should be the same size");
epee::mlocked<tools::scrubbed_arr<char, sizeof(base_key)+1>> data;
memcpy(data.data(), &base_key, sizeof(base_key));
data[sizeof(base_key)] = KEYS_ENCRYPTION_SALT;
data[sizeof(base_key)] = config::HASH_KEY_MEMORY;
crypto::generate_chacha_key(data.data(), sizeof(data), key, 1);
}
//-----------------------------------------------------------------

2
src/cryptonote_basic/cryptonote_format_utils.cpp
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@ -44,8 +44,6 @@ using namespace epee;
#undef MONERO_DEFAULT_LOG_CATEGORY
#define MONERO_DEFAULT_LOG_CATEGORY "cn"
#define ENCRYPTED_PAYMENT_ID_TAIL 0x8d
// #define ENABLE_HASH_CASH_INTEGRITY_CHECK
using namespace crypto;

11
src/cryptonote_config.h
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@ -204,6 +204,17 @@ namespace config
std::string const GENESIS_TX = "013c01ff0001ffffffffffff03029b2e4c0281c0b02e7c53291a94d1d0cbff8883f8024f5142ee494ffbbd08807121017767aafcde9be00dcfd098715ebcf7f410daebc582fda69d24a28e9d0bc890d1";
uint32_t const GENESIS_NONCE = 10000;
// Hash domain separators
const char HASH_KEY_BULLETPROOF_EXPONENT[] = "bulletproof";
const char HASH_KEY_RINGDB[] = "ringdsb";
const char HASH_KEY_SUBADDRESS[] = "SubAddr";
const unsigned char HASH_KEY_ENCRYPTED_PAYMENT_ID = 0x8d;
const unsigned char HASH_KEY_WALLET = 0x8c;
const unsigned char HASH_KEY_WALLET_CACHE = 0x8d;
const unsigned char HASH_KEY_RPC_PAYMENT_NONCE = 0x58;
const unsigned char HASH_KEY_MEMORY = 'k';
const unsigned char HASH_KEY_MULTISIG[] = {'M', 'u', 'l', 't' , 'i', 's', 'i', 'g', 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
namespace testnet
{
uint64_t const CRYPTONOTE_PUBLIC_ADDRESS_BASE58_PREFIX = 53;

19
src/device/device_default.cpp
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@ -36,9 +36,7 @@
#include "cryptonote_basic/subaddress_index.h"
#include "cryptonote_core/cryptonote_tx_utils.h"
#include "ringct/rctOps.h"
#define ENCRYPTED_PAYMENT_ID_TAIL 0x8d
#define CHACHA8_KEY_TAIL 0x8c
#include "cryptonote_config.h"
namespace hw {
@ -107,7 +105,7 @@ namespace hw {
epee::mlocked<tools::scrubbed_arr<char, sizeof(view_key) + sizeof(spend_key) + 1>> data;
memcpy(data.data(), &view_key, sizeof(view_key));
memcpy(data.data() + sizeof(view_key), &spend_key, sizeof(spend_key));
data[sizeof(data) - 1] = CHACHA8_KEY_TAIL;
data[sizeof(data) - 1] = config::HASH_KEY_WALLET;
crypto::generate_chacha_key(data.data(), sizeof(data), key, kdf_rounds);
return true;
}
@ -196,14 +194,13 @@ namespace hw {
}
crypto::secret_key device_default::get_subaddress_secret_key(const crypto::secret_key &a, const cryptonote::subaddress_index &index) {
const char prefix[] = "SubAddr";
char data[sizeof(prefix) + sizeof(crypto::secret_key) + 2 * sizeof(uint32_t)];
memcpy(data, prefix, sizeof(prefix));
memcpy(data + sizeof(prefix), &a, sizeof(crypto::secret_key));
char data[sizeof(config::HASH_KEY_SUBADDRESS) + sizeof(crypto::secret_key) + 2 * sizeof(uint32_t)];
memcpy(data, config::HASH_KEY_SUBADDRESS, sizeof(config::HASH_KEY_SUBADDRESS));
memcpy(data + sizeof(config::HASH_KEY_SUBADDRESS), &a, sizeof(crypto::secret_key));
uint32_t idx = SWAP32LE(index.major);
memcpy(data + sizeof(prefix) + sizeof(crypto::secret_key), &idx, sizeof(uint32_t));
memcpy(data + sizeof(config::HASH_KEY_SUBADDRESS) + sizeof(crypto::secret_key), &idx, sizeof(uint32_t));
idx = SWAP32LE(index.minor);
memcpy(data + sizeof(prefix) + sizeof(crypto::secret_key) + sizeof(uint32_t), &idx, sizeof(uint32_t));
memcpy(data + sizeof(config::HASH_KEY_SUBADDRESS) + sizeof(crypto::secret_key) + sizeof(uint32_t), &idx, sizeof(uint32_t));
crypto::secret_key m;
crypto::hash_to_scalar(data, sizeof(data), m);
return m;
@ -344,7 +341,7 @@ namespace hw {
return false;
memcpy(data, &derivation, 32);
data[32] = ENCRYPTED_PAYMENT_ID_TAIL;
data[32] = config::HASH_KEY_ENCRYPTED_PAYMENT_ID;
cn_fast_hash(data, 33, hash);
for (size_t b = 0; b < 8; ++b)

7
src/multisig/multisig.cpp
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@ -33,19 +33,22 @@
#include "cryptonote_basic/account.h"
#include "cryptonote_basic/cryptonote_format_utils.h"
#include "multisig.h"
#include "cryptonote_config.h"
#undef MONERO_DEFAULT_LOG_CATEGORY
#define MONERO_DEFAULT_LOG_CATEGORY "multisig"
using namespace std;
static const rct::key multisig_salt = { {'M', 'u', 'l', 't' , 'i', 's', 'i', 'g', 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 } };
namespace cryptonote
{
//-----------------------------------------------------------------
crypto::secret_key get_multisig_blinded_secret_key(const crypto::secret_key &key)
{
rct::key multisig_salt;
static_assert(sizeof(rct::key) == sizeof(config::HASH_KEY_MULTISIG), "Hash domain separator is an unexpected size");
memcpy(multisig_salt.bytes, config::HASH_KEY_MULTISIG, sizeof(rct::key));
rct::keyV data;
data.reserve(2);
data.push_back(rct::sk2rct(key));

4
src/ringct/bulletproofs.cc
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@ -100,8 +100,8 @@ static inline bool is_reduced(const rct::key &scalar)
static rct::key get_exponent(const rct::key &base, size_t idx)
{
static const std::string salt("bulletproof");
std::string hashed = std::string((const char*)base.bytes, sizeof(base)) + salt + tools::get_varint_data(idx);
static const std::string domain_separator(config::HASH_KEY_BULLETPROOF_EXPONENT);
std::string hashed = std::string((const char*)base.bytes, sizeof(base)) + domain_separator + tools::get_varint_data(idx);
rct::key e;
ge_p3 e_p3;
rct::hash_to_p3(e_p3, rct::hash2rct(crypto::cn_fast_hash(hashed.data(), hashed.size())));

4
src/rpc/rpc_payment.cpp
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@ -54,8 +54,6 @@
#define DEFAULT_FLUSH_AGE (3600 * 24 * 180) // half a year
#define DEFAULT_ZERO_FLUSH_AGE (60 * 2) // 2 minutes
#define RPC_PAYMENT_NONCE_TAIL 0x58
namespace cryptonote
{
rpc_payment::client_info::client_info():
@ -147,7 +145,7 @@ namespace cryptonote
return false;
char data[33];
memcpy(data, &client, 32);
data[32] = RPC_PAYMENT_NONCE_TAIL;
data[32] = config::HASH_KEY_RPC_PAYMENT_NONCE;
crypto::hash hash;
cn_fast_hash(data, sizeof(data), hash);
extra_nonce = cryptonote::blobdata((const char*)&hash, 4);

9
src/wallet/ringdb.cpp
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@ -35,6 +35,7 @@
#include "misc_language.h"
#include "wallet_errors.h"
#include "ringdb.h"
#include "cryptonote_config.h"
#undef MONERO_DEFAULT_LOG_CATEGORY
#define MONERO_DEFAULT_LOG_CATEGORY "wallet.ringdb"
@ -105,13 +106,11 @@ std::string get_rings_filename(boost::filesystem::path filename)
static crypto::chacha_iv make_iv(const crypto::key_image &key_image, const crypto::chacha_key &key, uint8_t field)
{
static const char salt[] = "ringdsb";
uint8_t buffer[sizeof(key_image) + sizeof(key) + sizeof(salt) + sizeof(field)];
uint8_t buffer[sizeof(key_image) + sizeof(key) + sizeof(config::HASH_KEY_RINGDB) + sizeof(field)];
memcpy(buffer, &key_image, sizeof(key_image));
memcpy(buffer + sizeof(key_image), &key, sizeof(key));
memcpy(buffer + sizeof(key_image) + sizeof(key), salt, sizeof(salt));
memcpy(buffer + sizeof(key_image) + sizeof(key) + sizeof(salt), &field, sizeof(field));
memcpy(buffer + sizeof(key_image) + sizeof(key), config::HASH_KEY_RINGDB, sizeof(config::HASH_KEY_RINGDB));
memcpy(buffer + sizeof(key_image) + sizeof(key) + sizeof(config::HASH_KEY_RINGDB), &field, sizeof(field));
crypto::hash hash;
// if field is 0, backward compat mode: hash without the field
crypto::cn_fast_hash(buffer, sizeof(buffer) - !field, hash.data);

6
src/wallet/wallet2.cpp
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@ -102,10 +102,6 @@ using namespace cryptonote;
// used to target a given block weight (additional outputs may be added on top to build fee)
#define TX_WEIGHT_TARGET(bytes) (bytes*2/3)
// arbitrary, used to generate different hashes from the same input
#define CHACHA8_KEY_TAIL 0x8c
#define CACHE_KEY_TAIL 0x8d
#define UNSIGNED_TX_PREFIX "Monero unsigned tx set\004"
#define SIGNED_TX_PREFIX "Monero signed tx set\004"
#define MULTISIG_UNSIGNED_TX_PREFIX "Monero multisig unsigned tx set\001"
@ -3932,7 +3928,7 @@ void wallet2::setup_keys(const epee::wipeable_string &password)
static_assert(HASH_SIZE == sizeof(crypto::chacha_key), "Mismatched sizes of hash and chacha key");
epee::mlocked<tools::scrubbed_arr<char, HASH_SIZE+1>> cache_key_data;
memcpy(cache_key_data.data(), &key, HASH_SIZE);
cache_key_data[HASH_SIZE] = CACHE_KEY_TAIL;
cache_key_data[HASH_SIZE] = config::HASH_KEY_WALLET_CACHE;
cn_fast_hash(cache_key_data.data(), HASH_SIZE+1, (crypto::hash&)m_cache_key);
get_ringdb_key();
}