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wownero/src/cryptonote_basic/cryptonote_format_utils.cpp

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// Copyright (c) 2014-2017, The Monero Project
//
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without modification, are
// permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this list of
// conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice, this list
// of conditions and the following disclaimer in the documentation and/or other
// materials provided with the distribution.
//
// 3. Neither the name of the copyright holder nor the names of its contributors may be
// used to endorse or promote products derived from this software without specific
// prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Parts of this file are originally copyright (c) 2012-2013 The Cryptonote developers
#include "include_base_utils.h"
using namespace epee;
#include <atomic>
#include <boost/algorithm/string.hpp>
#include "wipeable_string.h"
#include "string_tools.h"
#include "cryptonote_format_utils.h"
#include "cryptonote_config.h"
#include "crypto/crypto.h"
#include "crypto/hash.h"
#include "ringct/rctSigs.h"
#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;
static const uint64_t valid_decomposed_outputs[] = {
(uint64_t)1, (uint64_t)2, (uint64_t)3, (uint64_t)4, (uint64_t)5, (uint64_t)6, (uint64_t)7, (uint64_t)8, (uint64_t)9, // 1 piconero
(uint64_t)10, (uint64_t)20, (uint64_t)30, (uint64_t)40, (uint64_t)50, (uint64_t)60, (uint64_t)70, (uint64_t)80, (uint64_t)90,
(uint64_t)100, (uint64_t)200, (uint64_t)300, (uint64_t)400, (uint64_t)500, (uint64_t)600, (uint64_t)700, (uint64_t)800, (uint64_t)900,
(uint64_t)1000, (uint64_t)2000, (uint64_t)3000, (uint64_t)4000, (uint64_t)5000, (uint64_t)6000, (uint64_t)7000, (uint64_t)8000, (uint64_t)9000,
(uint64_t)10000, (uint64_t)20000, (uint64_t)30000, (uint64_t)40000, (uint64_t)50000, (uint64_t)60000, (uint64_t)70000, (uint64_t)80000, (uint64_t)90000,
(uint64_t)100000, (uint64_t)200000, (uint64_t)300000, (uint64_t)400000, (uint64_t)500000, (uint64_t)600000, (uint64_t)700000, (uint64_t)800000, (uint64_t)900000,
(uint64_t)1000000, (uint64_t)2000000, (uint64_t)3000000, (uint64_t)4000000, (uint64_t)5000000, (uint64_t)6000000, (uint64_t)7000000, (uint64_t)8000000, (uint64_t)9000000, // 1 micronero
(uint64_t)10000000, (uint64_t)20000000, (uint64_t)30000000, (uint64_t)40000000, (uint64_t)50000000, (uint64_t)60000000, (uint64_t)70000000, (uint64_t)80000000, (uint64_t)90000000,
(uint64_t)100000000, (uint64_t)200000000, (uint64_t)300000000, (uint64_t)400000000, (uint64_t)500000000, (uint64_t)600000000, (uint64_t)700000000, (uint64_t)800000000, (uint64_t)900000000,
(uint64_t)1000000000, (uint64_t)2000000000, (uint64_t)3000000000, (uint64_t)4000000000, (uint64_t)5000000000, (uint64_t)6000000000, (uint64_t)7000000000, (uint64_t)8000000000, (uint64_t)9000000000,
(uint64_t)10000000000, (uint64_t)20000000000, (uint64_t)30000000000, (uint64_t)40000000000, (uint64_t)50000000000, (uint64_t)60000000000, (uint64_t)70000000000, (uint64_t)80000000000, (uint64_t)90000000000,
(uint64_t)100000000000, (uint64_t)200000000000, (uint64_t)300000000000, (uint64_t)400000000000, (uint64_t)500000000000, (uint64_t)600000000000, (uint64_t)700000000000, (uint64_t)800000000000, (uint64_t)900000000000,
(uint64_t)1000000000000, (uint64_t)2000000000000, (uint64_t)3000000000000, (uint64_t)4000000000000, (uint64_t)5000000000000, (uint64_t)6000000000000, (uint64_t)7000000000000, (uint64_t)8000000000000, (uint64_t)9000000000000, // 1 monero
(uint64_t)10000000000000, (uint64_t)20000000000000, (uint64_t)30000000000000, (uint64_t)40000000000000, (uint64_t)50000000000000, (uint64_t)60000000000000, (uint64_t)70000000000000, (uint64_t)80000000000000, (uint64_t)90000000000000,
(uint64_t)100000000000000, (uint64_t)200000000000000, (uint64_t)300000000000000, (uint64_t)400000000000000, (uint64_t)500000000000000, (uint64_t)600000000000000, (uint64_t)700000000000000, (uint64_t)800000000000000, (uint64_t)900000000000000,
(uint64_t)1000000000000000, (uint64_t)2000000000000000, (uint64_t)3000000000000000, (uint64_t)4000000000000000, (uint64_t)5000000000000000, (uint64_t)6000000000000000, (uint64_t)7000000000000000, (uint64_t)8000000000000000, (uint64_t)9000000000000000,
(uint64_t)10000000000000000, (uint64_t)20000000000000000, (uint64_t)30000000000000000, (uint64_t)40000000000000000, (uint64_t)50000000000000000, (uint64_t)60000000000000000, (uint64_t)70000000000000000, (uint64_t)80000000000000000, (uint64_t)90000000000000000,
(uint64_t)100000000000000000, (uint64_t)200000000000000000, (uint64_t)300000000000000000, (uint64_t)400000000000000000, (uint64_t)500000000000000000, (uint64_t)600000000000000000, (uint64_t)700000000000000000, (uint64_t)800000000000000000, (uint64_t)900000000000000000,
(uint64_t)1000000000000000000, (uint64_t)2000000000000000000, (uint64_t)3000000000000000000, (uint64_t)4000000000000000000, (uint64_t)5000000000000000000, (uint64_t)6000000000000000000, (uint64_t)7000000000000000000, (uint64_t)8000000000000000000, (uint64_t)9000000000000000000, // 1 meganero
(uint64_t)10000000000000000000ull
};
static std::atomic<unsigned int> default_decimal_point(CRYPTONOTE_DISPLAY_DECIMAL_POINT);
static std::atomic<uint64_t> tx_hashes_calculated_count(0);
static std::atomic<uint64_t> tx_hashes_cached_count(0);
static std::atomic<uint64_t> block_hashes_calculated_count(0);
static std::atomic<uint64_t> block_hashes_cached_count(0);
namespace cryptonote
{
//---------------------------------------------------------------
void get_transaction_prefix_hash(const transaction_prefix& tx, crypto::hash& h)
{
std::ostringstream s;
binary_archive<true> a(s);
::serialization::serialize(a, const_cast<transaction_prefix&>(tx));
crypto::cn_fast_hash(s.str().data(), s.str().size(), h);
}
//---------------------------------------------------------------
crypto::hash get_transaction_prefix_hash(const transaction_prefix& tx)
{
crypto::hash h = null_hash;
get_transaction_prefix_hash(tx, h);
return h;
}
//---------------------------------------------------------------
bool parse_and_validate_tx_from_blob(const blobdata& tx_blob, transaction& tx)
{
std::stringstream ss;
ss << tx_blob;
binary_archive<false> ba(ss);
bool r = ::serialization::serialize(ba, tx);
CHECK_AND_ASSERT_MES(r, false, "Failed to parse transaction from blob");
tx.invalidate_hashes();
return true;
}
//---------------------------------------------------------------
bool parse_and_validate_tx_base_from_blob(const blobdata& tx_blob, transaction& tx)
{
std::stringstream ss;
ss << tx_blob;
binary_archive<false> ba(ss);
bool r = tx.serialize_base(ba);
CHECK_AND_ASSERT_MES(r, false, "Failed to parse transaction from blob");
return true;
}
//---------------------------------------------------------------
bool parse_and_validate_tx_from_blob(const blobdata& tx_blob, transaction& tx, crypto::hash& tx_hash, crypto::hash& tx_prefix_hash)
{
std::stringstream ss;
ss << tx_blob;
binary_archive<false> ba(ss);
bool r = ::serialization::serialize(ba, tx);
CHECK_AND_ASSERT_MES(r, false, "Failed to parse transaction from blob");
tx.invalidate_hashes();
//TODO: validate tx
get_transaction_hash(tx, tx_hash);
get_transaction_prefix_hash(tx, tx_prefix_hash);
return true;
}
//---------------------------------------------------------------
crypto::secret_key get_subaddress_secret_key(const crypto::secret_key& a, const subaddress_index& index)
{
const char prefix[] = "SubAddr";
char data[sizeof(prefix) + sizeof(crypto::secret_key) + sizeof(subaddress_index)];
memcpy(data, prefix, sizeof(prefix));
memcpy(data + sizeof(prefix), &a, sizeof(crypto::secret_key));
memcpy(data + sizeof(prefix) + sizeof(crypto::secret_key), &index, sizeof(subaddress_index));
crypto::secret_key m;
crypto::hash_to_scalar(data, sizeof(data), m);
return m;
}
//---------------------------------------------------------------
bool generate_key_image_helper(const account_keys& ack, const std::unordered_map<crypto::public_key, subaddress_index>& subaddresses, const crypto::public_key& out_key, const crypto::public_key& tx_public_key, const std::vector<crypto::public_key>& additional_tx_public_keys, size_t real_output_index, keypair& in_ephemeral, crypto::key_image& ki)
{
crypto::key_derivation recv_derivation = AUTO_VAL_INIT(recv_derivation);
bool r = crypto::generate_key_derivation(tx_public_key, ack.m_view_secret_key, recv_derivation);
CHECK_AND_ASSERT_MES(r, false, "key image helper: failed to generate_key_derivation(" << tx_public_key << ", " << ack.m_view_secret_key << ")");
std::vector<crypto::key_derivation> additional_recv_derivations;
for (size_t i = 0; i < additional_tx_public_keys.size(); ++i)
{
crypto::key_derivation additional_recv_derivation = AUTO_VAL_INIT(additional_recv_derivation);
r = crypto::generate_key_derivation(additional_tx_public_keys[i], ack.m_view_secret_key, additional_recv_derivation);
CHECK_AND_ASSERT_MES(r, false, "key image helper: failed to generate_key_derivation(" << additional_tx_public_keys[i] << ", " << ack.m_view_secret_key << ")");
additional_recv_derivations.push_back(additional_recv_derivation);
}
boost::optional<subaddress_receive_info> subaddr_recv_info = is_out_to_acc_precomp(subaddresses, out_key, recv_derivation, additional_recv_derivations, real_output_index);
CHECK_AND_ASSERT_MES(subaddr_recv_info, false, "key image helper: given output pubkey doesn't seem to belong to this address");
return generate_key_image_helper_precomp(ack, out_key, subaddr_recv_info->derivation, real_output_index, subaddr_recv_info->index, in_ephemeral, ki);
}
//---------------------------------------------------------------
bool generate_key_image_helper_precomp(const account_keys& ack, const crypto::public_key& out_key, const crypto::key_derivation& recv_derivation, size_t real_output_index, const subaddress_index& received_index, keypair& in_ephemeral, crypto::key_image& ki)
{
if (ack.m_spend_secret_key == crypto::null_skey)
{
// for watch-only wallet, simply copy the known output pubkey
in_ephemeral.pub = out_key;
in_ephemeral.sec = crypto::null_skey;
}
else
{
// derive secret key with subaddress - step 1: original CN derivation
crypto::secret_key scalar_step1;
crypto::derive_secret_key(recv_derivation, real_output_index, ack.m_spend_secret_key, scalar_step1); // computes Hs(a*R || idx) + b
// step 2: add Hs(a || index_major || index_minor)
crypto::secret_key scalar_step2;
if (received_index.is_zero())
{
scalar_step2 = scalar_step1; // treat index=(0,0) as a special case representing the main address
}
else
{
crypto::secret_key m = get_subaddress_secret_key(ack.m_view_secret_key, received_index);
sc_add((unsigned char*)&scalar_step2, (unsigned char*)&scalar_step1, (unsigned char*)&m);
}
in_ephemeral.sec = scalar_step2;
crypto::secret_key_to_public_key(in_ephemeral.sec, in_ephemeral.pub);
CHECK_AND_ASSERT_MES(in_ephemeral.pub == out_key, false, "key image helper precomp: given output pubkey doesn't match the derived one");
}
crypto::generate_key_image(in_ephemeral.pub, in_ephemeral.sec, ki);
return true;
}
//---------------------------------------------------------------
uint64_t power_integral(uint64_t a, uint64_t b)
{
if(b == 0)
return 1;
uint64_t total = a;
for(uint64_t i = 1; i != b; i++)
total *= a;
return total;
}
//---------------------------------------------------------------
bool parse_amount(uint64_t& amount, const std::string& str_amount_)
{
std::string str_amount = str_amount_;
boost::algorithm::trim(str_amount);
size_t point_index = str_amount.find_first_of('.');
size_t fraction_size;
if (std::string::npos != point_index)
{
fraction_size = str_amount.size() - point_index - 1;
while (default_decimal_point < fraction_size && '0' == str_amount.back())
{
str_amount.erase(str_amount.size() - 1, 1);
--fraction_size;
}
if (default_decimal_point < fraction_size)
return false;
str_amount.erase(point_index, 1);
}
else
{
fraction_size = 0;
}
if (str_amount.empty())
return false;
if (fraction_size < default_decimal_point)
{
str_amount.append(default_decimal_point - fraction_size, '0');
}
return string_tools::get_xtype_from_string(amount, str_amount);
}
//---------------------------------------------------------------
bool get_tx_fee(const transaction& tx, uint64_t & fee)
{
if (tx.version > 1)
{
fee = tx.rct_signatures.txnFee;
return true;
}
uint64_t amount_in = 0;
uint64_t amount_out = 0;
for(auto& in: tx.vin)
{
CHECK_AND_ASSERT_MES(in.type() == typeid(txin_to_key), 0, "unexpected type id in transaction");
amount_in += boost::get<txin_to_key>(in).amount;
}
for(auto& o: tx.vout)
amount_out += o.amount;
CHECK_AND_ASSERT_MES(amount_in >= amount_out, false, "transaction spend (" <<amount_in << ") more than it has (" << amount_out << ")");
fee = amount_in - amount_out;
return true;
}
//---------------------------------------------------------------
uint64_t get_tx_fee(const transaction& tx)
{
uint64_t r = 0;
if(!get_tx_fee(tx, r))
return 0;
return r;
}
//---------------------------------------------------------------
bool parse_tx_extra(const std::vector<uint8_t>& tx_extra, std::vector<tx_extra_field>& tx_extra_fields)
{
tx_extra_fields.clear();
if(tx_extra.empty())
return true;
std::string extra_str(reinterpret_cast<const char*>(tx_extra.data()), tx_extra.size());
std::istringstream iss(extra_str);
binary_archive<false> ar(iss);
bool eof = false;
while (!eof)
{
tx_extra_field field;
bool r = ::do_serialize(ar, field);
CHECK_AND_NO_ASSERT_MES_L1(r, false, "failed to deserialize extra field. extra = " << string_tools::buff_to_hex_nodelimer(std::string(reinterpret_cast<const char*>(tx_extra.data()), tx_extra.size())));
tx_extra_fields.push_back(field);
std::ios_base::iostate state = iss.rdstate();
eof = (EOF == iss.peek());
iss.clear(state);
}
CHECK_AND_NO_ASSERT_MES_L1(::serialization::check_stream_state(ar), false, "failed to deserialize extra field. extra = " << string_tools::buff_to_hex_nodelimer(std::string(reinterpret_cast<const char*>(tx_extra.data()), tx_extra.size())));
return true;
}
//---------------------------------------------------------------
crypto::public_key get_tx_pub_key_from_extra(const std::vector<uint8_t>& tx_extra, size_t pk_index)
{
std::vector<tx_extra_field> tx_extra_fields;
parse_tx_extra(tx_extra, tx_extra_fields);
tx_extra_pub_key pub_key_field;
if(!find_tx_extra_field_by_type(tx_extra_fields, pub_key_field, pk_index))
return null_pkey;
return pub_key_field.pub_key;
}
//---------------------------------------------------------------
crypto::public_key get_tx_pub_key_from_extra(const transaction_prefix& tx_prefix, size_t pk_index)
{
return get_tx_pub_key_from_extra(tx_prefix.extra, pk_index);
}
//---------------------------------------------------------------
crypto::public_key get_tx_pub_key_from_extra(const transaction& tx, size_t pk_index)
{
return get_tx_pub_key_from_extra(tx.extra, pk_index);
}
//---------------------------------------------------------------
bool add_tx_pub_key_to_extra(transaction& tx, const crypto::public_key& tx_pub_key)
{
return add_tx_pub_key_to_extra(tx.extra, tx_pub_key);
}
//---------------------------------------------------------------
bool add_tx_pub_key_to_extra(transaction_prefix& tx, const crypto::public_key& tx_pub_key)
{
return add_tx_pub_key_to_extra(tx.extra, tx_pub_key);
}
//---------------------------------------------------------------
bool add_tx_pub_key_to_extra(std::vector<uint8_t>& tx_extra, const crypto::public_key& tx_pub_key)
{
tx_extra.resize(tx_extra.size() + 1 + sizeof(crypto::public_key));
tx_extra[tx_extra.size() - 1 - sizeof(crypto::public_key)] = TX_EXTRA_TAG_PUBKEY;
*reinterpret_cast<crypto::public_key*>(&tx_extra[tx_extra.size() - sizeof(crypto::public_key)]) = tx_pub_key;
return true;
}
//---------------------------------------------------------------
std::vector<crypto::public_key> get_additional_tx_pub_keys_from_extra(const std::vector<uint8_t>& tx_extra)
{
// parse
std::vector<tx_extra_field> tx_extra_fields;
parse_tx_extra(tx_extra, tx_extra_fields);
// find corresponding field
tx_extra_additional_pub_keys additional_pub_keys;
if(!find_tx_extra_field_by_type(tx_extra_fields, additional_pub_keys))
return {};
return additional_pub_keys.data;
}
//---------------------------------------------------------------
std::vector<crypto::public_key> get_additional_tx_pub_keys_from_extra(const transaction_prefix& tx)
{
return get_additional_tx_pub_keys_from_extra(tx.extra);
}
//---------------------------------------------------------------
bool add_additional_tx_pub_keys_to_extra(std::vector<uint8_t>& tx_extra, const std::vector<crypto::public_key>& additional_pub_keys)
{
// convert to variant
tx_extra_field field = tx_extra_additional_pub_keys{ additional_pub_keys };
// serialize
std::ostringstream oss;
binary_archive<true> ar(oss);
bool r = ::do_serialize(ar, field);
CHECK_AND_NO_ASSERT_MES_L1(r, false, "failed to serialize tx extra additional tx pub keys");
// append
std::string tx_extra_str = oss.str();
size_t pos = tx_extra.size();
tx_extra.resize(tx_extra.size() + tx_extra_str.size());
memcpy(&tx_extra[pos], tx_extra_str.data(), tx_extra_str.size());
return true;
}
//---------------------------------------------------------------
bool add_extra_nonce_to_tx_extra(std::vector<uint8_t>& tx_extra, const blobdata& extra_nonce)
{
CHECK_AND_ASSERT_MES(extra_nonce.size() <= TX_EXTRA_NONCE_MAX_COUNT, false, "extra nonce could be 255 bytes max");
size_t start_pos = tx_extra.size();
tx_extra.resize(tx_extra.size() + 2 + extra_nonce.size());
//write tag
tx_extra[start_pos] = TX_EXTRA_NONCE;
//write len
++start_pos;
tx_extra[start_pos] = static_cast<uint8_t>(extra_nonce.size());
//write data
++start_pos;
memcpy(&tx_extra[start_pos], extra_nonce.data(), extra_nonce.size());
return true;
}
//---------------------------------------------------------------
bool remove_field_from_tx_extra(std::vector<uint8_t>& tx_extra, const std::type_info &type)
{
if (tx_extra.empty())
return true;
std::string extra_str(reinterpret_cast<const char*>(tx_extra.data()), tx_extra.size());
std::istringstream iss(extra_str);
binary_archive<false> ar(iss);
std::ostringstream oss;
binary_archive<true> newar(oss);
bool eof = false;
while (!eof)
{
tx_extra_field field;
bool r = ::do_serialize(ar, field);
CHECK_AND_NO_ASSERT_MES_L1(r, false, "failed to deserialize extra field. extra = " << string_tools::buff_to_hex_nodelimer(std::string(reinterpret_cast<const char*>(tx_extra.data()), tx_extra.size())));
if (field.type() != type)
::do_serialize(newar, field);
std::ios_base::iostate state = iss.rdstate();
eof = (EOF == iss.peek());
iss.clear(state);
}
CHECK_AND_NO_ASSERT_MES_L1(::serialization::check_stream_state(ar), false, "failed to deserialize extra field. extra = " << string_tools::buff_to_hex_nodelimer(std::string(reinterpret_cast<const char*>(tx_extra.data()), tx_extra.size())));
tx_extra.clear();
std::string s = oss.str();
tx_extra.reserve(s.size());
std::copy(s.begin(), s.end(), std::back_inserter(tx_extra));
return true;
}
//---------------------------------------------------------------
void set_payment_id_to_tx_extra_nonce(blobdata& extra_nonce, const crypto::hash& payment_id)
{
extra_nonce.clear();
extra_nonce.push_back(TX_EXTRA_NONCE_PAYMENT_ID);
const uint8_t* payment_id_ptr = reinterpret_cast<const uint8_t*>(&payment_id);
std::copy(payment_id_ptr, payment_id_ptr + sizeof(payment_id), std::back_inserter(extra_nonce));
}
//---------------------------------------------------------------
void set_encrypted_payment_id_to_tx_extra_nonce(blobdata& extra_nonce, const crypto::hash8& payment_id)
{
extra_nonce.clear();
extra_nonce.push_back(TX_EXTRA_NONCE_ENCRYPTED_PAYMENT_ID);
const uint8_t* payment_id_ptr = reinterpret_cast<const uint8_t*>(&payment_id);
std::copy(payment_id_ptr, payment_id_ptr + sizeof(payment_id), std::back_inserter(extra_nonce));
}
//---------------------------------------------------------------
bool get_payment_id_from_tx_extra_nonce(const blobdata& extra_nonce, crypto::hash& payment_id)
{
if(sizeof(crypto::hash) + 1 != extra_nonce.size())
return false;
if(TX_EXTRA_NONCE_PAYMENT_ID != extra_nonce[0])
return false;
payment_id = *reinterpret_cast<const crypto::hash*>(extra_nonce.data() + 1);
return true;
}
//---------------------------------------------------------------
bool get_encrypted_payment_id_from_tx_extra_nonce(const blobdata& extra_nonce, crypto::hash8& payment_id)
{
if(sizeof(crypto::hash8) + 1 != extra_nonce.size())
return false;
if (TX_EXTRA_NONCE_ENCRYPTED_PAYMENT_ID != extra_nonce[0])
return false;
payment_id = *reinterpret_cast<const crypto::hash8*>(extra_nonce.data() + 1);
return true;
}
//---------------------------------------------------------------
bool encrypt_payment_id(crypto::hash8 &payment_id, const crypto::public_key &public_key, const crypto::secret_key &secret_key)
{
crypto::key_derivation derivation;
crypto::hash hash;
char data[33]; /* A hash, and an extra byte */
if (!generate_key_derivation(public_key, secret_key, derivation))
return false;
memcpy(data, &derivation, 32);
data[32] = ENCRYPTED_PAYMENT_ID_TAIL;
cn_fast_hash(data, 33, hash);
for (size_t b = 0; b < 8; ++b)
payment_id.data[b] ^= hash.data[b];
return true;
}
bool decrypt_payment_id(crypto::hash8 &payment_id, const crypto::public_key &public_key, const crypto::secret_key &secret_key)
{
// Encryption and decryption are the same operation (xor with a key)
return encrypt_payment_id(payment_id, public_key, secret_key);
}
//---------------------------------------------------------------
bool get_inputs_money_amount(const transaction& tx, uint64_t& money)
{
money = 0;
for(const auto& in: tx.vin)
{
CHECKED_GET_SPECIFIC_VARIANT(in, const txin_to_key, tokey_in, false);
money += tokey_in.amount;
}
return true;
}
//---------------------------------------------------------------
uint64_t get_block_height(const block& b)
{
CHECK_AND_ASSERT_MES(b.miner_tx.vin.size() == 1, 0, "wrong miner tx in block: " << get_block_hash(b) << ", b.miner_tx.vin.size() != 1");
CHECKED_GET_SPECIFIC_VARIANT(b.miner_tx.vin[0], const txin_gen, coinbase_in, 0);
return coinbase_in.height;
}
//---------------------------------------------------------------
bool check_inputs_types_supported(const transaction& tx)
{
for(const auto& in: tx.vin)
{
CHECK_AND_ASSERT_MES(in.type() == typeid(txin_to_key), false, "wrong variant type: "
<< in.type().name() << ", expected " << typeid(txin_to_key).name()
<< ", in transaction id=" << get_transaction_hash(tx));
}
return true;
}
//-----------------------------------------------------------------------------------------------
bool check_outs_valid(const transaction& tx)
{
for(const tx_out& out: tx.vout)
{
CHECK_AND_ASSERT_MES(out.target.type() == typeid(txout_to_key), false, "wrong variant type: "
<< out.target.type().name() << ", expected " << typeid(txout_to_key).name()
<< ", in transaction id=" << get_transaction_hash(tx));
if (tx.version == 1)
{
CHECK_AND_NO_ASSERT_MES(0 < out.amount, false, "zero amount output in transaction id=" << get_transaction_hash(tx));
}
if(!check_key(boost::get<txout_to_key>(out.target).key))
return false;
}
return true;
}
//-----------------------------------------------------------------------------------------------
bool check_money_overflow(const transaction& tx)
{
return check_inputs_overflow(tx) && check_outs_overflow(tx);
}
//---------------------------------------------------------------
bool check_inputs_overflow(const transaction& tx)
{
uint64_t money = 0;
for(const auto& in: tx.vin)
{
CHECKED_GET_SPECIFIC_VARIANT(in, const txin_to_key, tokey_in, false);
if(money > tokey_in.amount + money)
return false;
money += tokey_in.amount;
}
return true;
}
//---------------------------------------------------------------
bool check_outs_overflow(const transaction& tx)
{
uint64_t money = 0;
for(const auto& o: tx.vout)
{
if(money > o.amount + money)
return false;
money += o.amount;
}
return true;
}
//---------------------------------------------------------------
uint64_t get_outs_money_amount(const transaction& tx)
{
uint64_t outputs_amount = 0;
for(const auto& o: tx.vout)
outputs_amount += o.amount;
return outputs_amount;
}
//---------------------------------------------------------------
std::string short_hash_str(const crypto::hash& h)
{
std::string res = string_tools::pod_to_hex(h);
CHECK_AND_ASSERT_MES(res.size() == 64, res, "wrong hash256 with string_tools::pod_to_hex conversion");
auto erased_pos = res.erase(8, 48);
res.insert(8, "....");
return res;
}
//---------------------------------------------------------------
bool is_out_to_acc(const account_keys& acc, const txout_to_key& out_key, const crypto::public_key& tx_pub_key, const std::vector<crypto::public_key>& additional_tx_pub_keys, size_t output_index)
{
crypto::key_derivation derivation;
generate_key_derivation(tx_pub_key, acc.m_view_secret_key, derivation);
crypto::public_key pk;
derive_public_key(derivation, output_index, acc.m_account_address.m_spend_public_key, pk);
if (pk == out_key.key)
return true;
// try additional tx pubkeys if available
if (!additional_tx_pub_keys.empty())
{
CHECK_AND_ASSERT_MES(output_index < additional_tx_pub_keys.size(), false, "wrong number of additional tx pubkeys");
generate_key_derivation(additional_tx_pub_keys[output_index], acc.m_view_secret_key, derivation);
derive_public_key(derivation, output_index, acc.m_account_address.m_spend_public_key, pk);
return pk == out_key.key;
}
return false;
}
//---------------------------------------------------------------
boost::optional<subaddress_receive_info> is_out_to_acc_precomp(const std::unordered_map<crypto::public_key, subaddress_index>& subaddresses, const crypto::public_key& out_key, const crypto::key_derivation& derivation, const std::vector<crypto::key_derivation>& additional_derivations, size_t output_index)
{
// try the shared tx pubkey
crypto::public_key subaddress_spendkey;
derive_subaddress_public_key(out_key, derivation, output_index, subaddress_spendkey);
auto found = subaddresses.find(subaddress_spendkey);
if (found != subaddresses.end())
return subaddress_receive_info{ found->second, derivation };
// try additional tx pubkeys if available
if (!additional_derivations.empty())
{
CHECK_AND_ASSERT_MES(output_index < additional_derivations.size(), boost::none, "wrong number of additional derivations");
derive_subaddress_public_key(out_key, additional_derivations[output_index], output_index, subaddress_spendkey);
found = subaddresses.find(subaddress_spendkey);
if (found != subaddresses.end())
return subaddress_receive_info{ found->second, additional_derivations[output_index] };
}
return boost::none;
}
//---------------------------------------------------------------
bool lookup_acc_outs(const account_keys& acc, const transaction& tx, std::vector<size_t>& outs, uint64_t& money_transfered)
{
crypto::public_key tx_pub_key = get_tx_pub_key_from_extra(tx);
if(null_pkey == tx_pub_key)
return false;
std::vector<crypto::public_key> additional_tx_pub_keys = get_additional_tx_pub_keys_from_extra(tx);
return lookup_acc_outs(acc, tx, tx_pub_key, additional_tx_pub_keys, outs, money_transfered);
}
//---------------------------------------------------------------
bool lookup_acc_outs(const account_keys& acc, const transaction& tx, const crypto::public_key& tx_pub_key, const std::vector<crypto::public_key>& additional_tx_pub_keys, std::vector<size_t>& outs, uint64_t& money_transfered)
{
CHECK_AND_ASSERT_MES(additional_tx_pub_keys.empty() || additional_tx_pub_keys.size() == tx.vout.size(), false, "wrong number of additional pubkeys" );
money_transfered = 0;
size_t i = 0;
for(const tx_out& o: tx.vout)
{
CHECK_AND_ASSERT_MES(o.target.type() == typeid(txout_to_key), false, "wrong type id in transaction out" );
if(is_out_to_acc(acc, boost::get<txout_to_key>(o.target), tx_pub_key, additional_tx_pub_keys, i))
{
outs.push_back(i);
money_transfered += o.amount;
}
i++;
}
return true;
}
//---------------------------------------------------------------
void get_blob_hash(const blobdata& blob, crypto::hash& res)
{
cn_fast_hash(blob.data(), blob.size(), res);
}
//---------------------------------------------------------------
void set_default_decimal_point(unsigned int decimal_point)
{
switch (decimal_point)
{
case 12:
case 9:
case 6:
case 3:
case 0:
default_decimal_point = decimal_point;
break;
default:
ASSERT_MES_AND_THROW("Invalid decimal point specification: " << decimal_point);
}
}
//---------------------------------------------------------------
unsigned int get_default_decimal_point()
{
return default_decimal_point;
}
//---------------------------------------------------------------
std::string get_unit(unsigned int decimal_point)
{
if (decimal_point == (unsigned int)-1)
decimal_point = default_decimal_point;
switch (std::atomic_load(&default_decimal_point))
{
case 12:
return "monero";
case 9:
return "millinero";
case 6:
return "micronero";
case 3:
return "nanonero";
case 0:
return "piconero";
default:
ASSERT_MES_AND_THROW("Invalid decimal point specification: " << default_decimal_point);
}
}
//---------------------------------------------------------------
std::string print_money(uint64_t amount, unsigned int decimal_point)
{
if (decimal_point == (unsigned int)-1)
decimal_point = default_decimal_point;
std::string s = std::to_string(amount);
if(s.size() < decimal_point+1)
{
s.insert(0, decimal_point+1 - s.size(), '0');
}
if (decimal_point > 0)
s.insert(s.size() - decimal_point, ".");
return s;
}
//---------------------------------------------------------------
crypto::hash get_blob_hash(const blobdata& blob)
{
crypto::hash h = null_hash;
get_blob_hash(blob, h);
return h;
}
//---------------------------------------------------------------
crypto::hash get_transaction_hash(const transaction& t)
{
crypto::hash h = null_hash;
get_transaction_hash(t, h, NULL);
return h;
}
//---------------------------------------------------------------
bool get_transaction_hash(const transaction& t, crypto::hash& res)
{
return get_transaction_hash(t, res, NULL);
}
//---------------------------------------------------------------
bool calculate_transaction_hash(const transaction& t, crypto::hash& res, size_t* blob_size)
{
// v1 transactions hash the entire blob
if (t.version == 1)
{
size_t ignored_blob_size, &blob_size_ref = blob_size ? *blob_size : ignored_blob_size;
return get_object_hash(t, res, blob_size_ref);
}
// v2 transactions hash different parts together, than hash the set of those hashes
crypto::hash hashes[3];
// prefix
get_transaction_prefix_hash(t, hashes[0]);
transaction &tt = const_cast<transaction&>(t);
// base rct
{
std::stringstream ss;
binary_archive<true> ba(ss);
const size_t inputs = t.vin.size();
const size_t outputs = t.vout.size();
bool r = tt.rct_signatures.serialize_rctsig_base(ba, inputs, outputs);
CHECK_AND_ASSERT_MES(r, false, "Failed to serialize rct signatures base");
cryptonote::get_blob_hash(ss.str(), hashes[1]);
}
// prunable rct
if (t.rct_signatures.type == rct::RCTTypeNull)
{
hashes[2] = crypto::null_hash;
}
else
{
std::stringstream ss;
binary_archive<true> ba(ss);
const size_t inputs = t.vin.size();
const size_t outputs = t.vout.size();
const size_t mixin = t.vin.empty() ? 0 : t.vin[0].type() == typeid(txin_to_key) ? boost::get<txin_to_key>(t.vin[0]).key_offsets.size() - 1 : 0;
bool r = tt.rct_signatures.p.serialize_rctsig_prunable(ba, t.rct_signatures.type, inputs, outputs, mixin);
CHECK_AND_ASSERT_MES(r, false, "Failed to serialize rct signatures prunable");
cryptonote::get_blob_hash(ss.str(), hashes[2]);
}
// the tx hash is the hash of the 3 hashes
res = cn_fast_hash(hashes, sizeof(hashes));
// we still need the size
if (blob_size)
*blob_size = get_object_blobsize(t);
return true;
}
//---------------------------------------------------------------
bool get_transaction_hash(const transaction& t, crypto::hash& res, size_t* blob_size)
{
if (t.is_hash_valid())
{
#ifdef ENABLE_HASH_CASH_INTEGRITY_CHECK
CHECK_AND_ASSERT_THROW_MES(!calculate_transaction_hash(t, res, blob_size) || t.hash == res, "tx hash cash integrity failure");
#endif
res = t.hash;
if (blob_size)
{
if (!t.is_blob_size_valid())
{
t.blob_size = get_object_blobsize(t);
t.set_blob_size_valid(true);
}
*blob_size = t.blob_size;
}
++tx_hashes_cached_count;
return true;
}
++tx_hashes_calculated_count;
bool ret = calculate_transaction_hash(t, res, blob_size);
if (!ret)
return false;
t.hash = res;
t.set_hash_valid(true);
if (blob_size)
{
t.blob_size = *blob_size;
t.set_blob_size_valid(true);
}
return true;
}
//---------------------------------------------------------------
bool get_transaction_hash(const transaction& t, crypto::hash& res, size_t& blob_size)
{
return get_transaction_hash(t, res, &blob_size);
}
//---------------------------------------------------------------
blobdata get_block_hashing_blob(const block& b)
{
blobdata blob = t_serializable_object_to_blob(static_cast<block_header>(b));
crypto::hash tree_root_hash = get_tx_tree_hash(b);
blob.append(reinterpret_cast<const char*>(&tree_root_hash), sizeof(tree_root_hash));
blob.append(tools::get_varint_data(b.tx_hashes.size()+1));
return blob;
}
//---------------------------------------------------------------
bool calculate_block_hash(const block& b, crypto::hash& res)
{
// EXCEPTION FOR BLOCK 202612
const std::string correct_blob_hash_202612 = "3a8a2b3a29b50fc86ff73dd087ea43c6f0d6b8f936c849194d5c84c737903966";
const std::string existing_block_id_202612 = "bbd604d2ba11ba27935e006ed39c9bfdd99b76bf4a50654bc1e1e61217962698";
crypto::hash block_blob_hash = get_blob_hash(block_to_blob(b));
if (string_tools::pod_to_hex(block_blob_hash) == correct_blob_hash_202612)
{
string_tools::hex_to_pod(existing_block_id_202612, res);
return true;
}
bool hash_result = get_object_hash(get_block_hashing_blob(b), res);
if (hash_result)
{
// make sure that we aren't looking at a block with the 202612 block id but not the correct blobdata
if (string_tools::pod_to_hex(res) == existing_block_id_202612)
{
LOG_ERROR("Block with block id for 202612 but incorrect block blob hash found!");
res = null_hash;
return false;
}
}
return hash_result;
}
//---------------------------------------------------------------
bool get_block_hash(const block& b, crypto::hash& res)
{
if (b.is_hash_valid())
{
#ifdef ENABLE_HASH_CASH_INTEGRITY_CHECK
CHECK_AND_ASSERT_THROW_MES(!calculate_block_hash(b, res) || b.hash == res, "block hash cash integrity failure");
#endif
res = b.hash;
++block_hashes_cached_count;
return true;
}
++block_hashes_calculated_count;
bool ret = calculate_block_hash(b, res);
if (!ret)
return false;
b.hash = res;
b.set_hash_valid(true);
return true;
}
//---------------------------------------------------------------
crypto::hash get_block_hash(const block& b)
{
crypto::hash p = null_hash;
get_block_hash(b, p);
return p;
}
//---------------------------------------------------------------
bool get_block_longhash(const block& b, crypto::hash& res, uint64_t height)
{
// block 202612 bug workaround
const std::string longhash_202612 = "84f64766475d51837ac9efbef1926486e58563c95a19fef4aec3254f03000000";
if (height == 202612)
{
string_tools::hex_to_pod(longhash_202612, res);
return true;
}
blobdata bd = get_block_hashing_blob(b);
crypto::cn_slow_hash(bd.data(), bd.size(), res);
return true;
}
//---------------------------------------------------------------
std::vector<uint64_t> relative_output_offsets_to_absolute(const std::vector<uint64_t>& off)
{
std::vector<uint64_t> res = off;
for(size_t i = 1; i < res.size(); i++)
res[i] += res[i-1];
return res;
}
//---------------------------------------------------------------
std::vector<uint64_t> absolute_output_offsets_to_relative(const std::vector<uint64_t>& off)
{
std::vector<uint64_t> res = off;
if(!off.size())
return res;
std::sort(res.begin(), res.end());//just to be sure, actually it is already should be sorted
for(size_t i = res.size()-1; i != 0; i--)
res[i] -= res[i-1];
return res;
}
//---------------------------------------------------------------
crypto::hash get_block_longhash(const block& b, uint64_t height)
{
crypto::hash p = null_hash;
get_block_longhash(b, p, height);
return p;
}
//---------------------------------------------------------------
bool parse_and_validate_block_from_blob(const blobdata& b_blob, block& b)
{
std::stringstream ss;
ss << b_blob;
binary_archive<false> ba(ss);
bool r = ::serialization::serialize(ba, b);
CHECK_AND_ASSERT_MES(r, false, "Failed to parse block from blob");
b.invalidate_hashes();
b.miner_tx.invalidate_hashes();
return true;
}
//---------------------------------------------------------------
blobdata block_to_blob(const block& b)
{
return t_serializable_object_to_blob(b);
}
//---------------------------------------------------------------
bool block_to_blob(const block& b, blobdata& b_blob)
{
return t_serializable_object_to_blob(b, b_blob);
}
//---------------------------------------------------------------
blobdata tx_to_blob(const transaction& tx)
{
return t_serializable_object_to_blob(tx);
}
//---------------------------------------------------------------
bool tx_to_blob(const transaction& tx, blobdata& b_blob)
{
return t_serializable_object_to_blob(tx, b_blob);
}
//---------------------------------------------------------------
void get_tx_tree_hash(const std::vector<crypto::hash>& tx_hashes, crypto::hash& h)
{
tree_hash(tx_hashes.data(), tx_hashes.size(), h);
}
//---------------------------------------------------------------
crypto::hash get_tx_tree_hash(const std::vector<crypto::hash>& tx_hashes)
{
crypto::hash h = null_hash;
get_tx_tree_hash(tx_hashes, h);
return h;
}
//---------------------------------------------------------------
crypto::hash get_tx_tree_hash(const block& b)
{
std::vector<crypto::hash> txs_ids;
crypto::hash h = null_hash;
size_t bl_sz = 0;
get_transaction_hash(b.miner_tx, h, bl_sz);
txs_ids.push_back(h);
for(auto& th: b.tx_hashes)
txs_ids.push_back(th);
return get_tx_tree_hash(txs_ids);
}
//---------------------------------------------------------------
bool is_valid_decomposed_amount(uint64_t amount)
{
const uint64_t *begin = valid_decomposed_outputs;
const uint64_t *end = valid_decomposed_outputs + sizeof(valid_decomposed_outputs) / sizeof(valid_decomposed_outputs[0]);
return std::binary_search(begin, end, amount);
}
//---------------------------------------------------------------
void get_hash_stats(uint64_t &tx_hashes_calculated, uint64_t &tx_hashes_cached, uint64_t &block_hashes_calculated, uint64_t & block_hashes_cached)
{
tx_hashes_calculated = tx_hashes_calculated_count;
tx_hashes_cached = tx_hashes_cached_count;
block_hashes_calculated = block_hashes_calculated_count;
block_hashes_cached = block_hashes_cached_count;
}
//---------------------------------------------------------------
crypto::secret_key encrypt_key(crypto::secret_key key, const epee::wipeable_string &passphrase)
{
crypto::hash hash;
crypto::cn_slow_hash(passphrase.data(), passphrase.size(), hash);
sc_add((unsigned char*)key.data, (const unsigned char*)key.data, (const unsigned char*)hash.data);
return key;
}
//---------------------------------------------------------------
crypto::secret_key decrypt_key(crypto::secret_key key, const epee::wipeable_string &passphrase)
{
crypto::hash hash;
crypto::cn_slow_hash(passphrase.data(), passphrase.size(), hash);
sc_sub((unsigned char*)key.data, (const unsigned char*)key.data, (const unsigned char*)hash.data);
return key;
}
}
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