bool checkpoint_sync_unsigned::decode(data_buffer & buffer)
{
m_version = buffer.read_int32();
m_hash_checkpoint = buffer.read_sha256();
return true;
}
bool checkpoint_sync::decode(data_buffer & buffer)
{
auto len = buffer.read_var_int();
if (len > 0)
{
m_message.resize(len);
buffer.read_bytes(
reinterpret_cast<char *>(&m_message[0]), m_message.size()
);
}
len = buffer.read_var_int();
if (len > 0)
{
m_signature.resize(len);
buffer.read_bytes(
reinterpret_cast<char *>(&m_signature[0]), m_signature.size()
);
}
return true;
}
void zerotime_lock::encode(data_buffer & buffer)
{
/**
* Encode the version.
*/
buffer.write_uint32(m_version);
/**
* Encode the transaction.
*/
m_transaction.encode(buffer);
/**
* Encode the transaction hash.
*/
buffer.write_bytes(
reinterpret_cast<const char *> (m_hash_tx.digest()),
sha256::digest_length
);
/**
* Encode the expiration.
*/
buffer.write_uint64(m_expiration);
/**
* No signature is required because:
* 1. The receiver may want to lock a non-zerotime transaction.
* 2. It causes no harm to let other's lock the transaction.
* 3. It conserves bandwidth and processing power.
*/
}
bool zerotime_question::decode(data_buffer & buffer)
{
/**
* Decode the version.
*/
m_version = buffer.read_uint32();
assert(m_version == current_version);
/**
* Decode the transaction inputs length.
*/
auto len = buffer.read_var_int();
/**
* Allocate the transaction inputs.
*/
m_transactions_in.resize(len);
for (auto i = 0; i < len; i++)
{
/**
* Decode the transaction_in.
*/
m_transactions_in[i].decode(buffer);
}
return true;
}
void transaction_out::decode(data_buffer & buffer)
{
/**
* Decode the value.
*/
m_value = buffer.read_int64();
/**
* Read the var_int.
*/
auto len = buffer.read_var_int();
if (len > 0)
{
/**
* Read the script.
*/
auto bytes = buffer.read_bytes(len);
/**
* Insert the script.
*/
m_script_public_key.insert(
m_script_public_key.begin(), bytes.begin(), bytes.end()
);
}
}
bool inventory_vector::decode(data_buffer & buffer)
{
m_type = static_cast<type_t> (buffer.read_uint32());
m_hash = buffer.read_sha256();
return true;
}
bool inventory_vector::encode(data_buffer & buffer)
{
buffer.write_uint32(m_type);
buffer.write_sha256(m_hash);
return true;
}
void chainblender_join::encode(data_buffer & buffer)
{
/**
* Encode the version.
*/
buffer.write_uint32(m_version);
/**
* The session id must be null for a cbjoin.
*/
if (m_hash_session_id.is_empty() == false)
{
log_error(
"ChainBlender join message has invalid hash session "
"id = " << m_hash_session_id.to_string() << "."
);
}
/**
* Encode the session id.
*/
buffer.write_sha256(m_hash_session_id);
/**
* Encode the denomination.
*/
buffer.write_int64(m_denomination);
}
offs_t cop420_disassembler::disassemble(std::ostream &stream, offs_t pc, const data_buffer &opcodes, const data_buffer ¶ms)
{
uint8_t opcode = opcodes.r8(pc);
uint8_t next_opcode = opcodes.r8(pc+1);
uint16_t address;
uint32_t flags = 0;
int bytes = 1;
if ((opcode >= 0x80 && opcode <= 0xBE) || (opcode >= 0xC0 && opcode <= 0xFE))
{
int page = pc >> 6;
if (page == 2 || page == 3) //JP pages 2,3
{
address = (uint16_t)((pc & 0x380) | (opcode & 0x7F));
util::stream_format(stream, "JP %03X", address);
}
else
{
if ((opcode & 0xC0) == 0xC0) //JP other pages
{
address = (uint16_t)((pc & 0x3C0) | (opcode & 0x3F));
util::stream_format(stream, "JP %03X", address);
}
else //JSRP
{
address = (uint16_t)(0x80 | (opcode & 0x3F));
util::stream_format(stream, "JSRP %03X", address);
flags = STEP_OVER;
}
}
}
bool merkle_tree_partial::decode(data_buffer & buffer)
{
m_total_transactions = buffer.read_uint32();
auto count = buffer.read_var_int();
for (auto i = 0; i < count; i++)
{
m_hashes.push_back(buffer.read_sha256());
}
std::vector<std::uint8_t> bytes;
auto len = buffer.read_var_int();
if (len > 0)
{
bytes.resize(len);
buffer.read_bytes(reinterpret_cast<char *>(&bytes[0]), len);
}
m_flags.resize(bytes.size() * 8);
for (auto i = 0; i < m_flags.size(); i++)
{
m_flags[i] = (bytes[i / 8] & (1 << (i % 8))) != 0;
}
is_invalid_ = false;
return true;
}
bool erase_begin(data_buffer& buffer, index123_type& index123)
{
data_pointer ptr = buffer.begin();
auto itr = index123.find( ptr.get_offset() /*static_cast<offset_t>( static_cast<size_t>(ptr) )*/);
index123.erase(itr);
buffer.deallocate(ptr, 1);
return true;
}
void hd_configuration::encode(data_buffer & buffer) const
{
assert(m_id_key_master.digest().size() == ripemd160::digest_length);
buffer.write_uint32(m_version);
buffer.write_uint32(m_index);
buffer.write_bytes(
reinterpret_cast<const char *> (&m_id_key_master.digest()[0]),
ripemd160::digest_length
);
}
/**
* Copy constructor
* @param other The other data_buffer.
*/
data_buffer(const data_buffer & other)
: m_read_ptr(0)
, file_offset_(other.file_offset_)
, file_(other.file_)
{
clear();
write_bytes(other.data(), other.size());
m_read_ptr = m_data.size() > 0 ? &m_data[0] : 0;
}
bool hd_configuration::decode(data_buffer & buffer)
{
m_version = buffer.read_uint32();
m_index = buffer.read_uint32();
buffer.read_bytes(
reinterpret_cast<char *> (&m_id_key_master.digest()[0]),
ripemd160::digest_length
);
return true;
}
void checkpoint_sync::encode(data_buffer & buffer)
{
buffer.write_var_int(m_message.size());
buffer.write_bytes(
reinterpret_cast<char *>(&m_message[0]), m_message.size()
);
buffer.write_var_int(m_signature.size());
buffer.write_bytes(
reinterpret_cast<char *>(&m_signature[0]), m_signature.size()
);
}
bool incentive_vote::verify(data_buffer & buffer)
{
auto ret = false;
/**
* Calculate the hash of the nonce hash.
*/
auto digest = hash::sha256d(
m_hash_nonce.digest(), sha256::digest_length
);
/**
* Hash the encoded message buffer.
*/
sha256 hash_value = sha256::from_digest(&digest[0]);
/**
* Read the signature.
*/
auto signature_len = buffer.read_var_int();
if (signature_len > 0)
{
m_signature.resize(signature_len);
buffer.read_bytes(
reinterpret_cast<char *>(&m_signature[0]), m_signature.size()
);
if (
incentive::instance().verify(m_public_key, hash_value,
m_signature) == true
)
{
ret = true;
log_debug(
"Incentive vote verified value (" <<
hash_value.to_string().substr(0, 8) << ")."
);
}
else
{
log_error(
"Incentive vote failed to verify value (" <<
hash_value.to_string().substr(0, 8) << ")."
);
}
}
return ret;
}
offs_t capricorn_disassembler::param_dr_lit(std::ostream &stream, offs_t pc, const data_buffer &opcodes)
{
stream << "DR,=";
// Here we assume that multi-byte instructions operate on 2 bytes because we
// have no way of knowing how many they are (the actual number of bytes is
// dynamically determined by the value of DRP register at run-time)
unsigned bytes = BIT(opcodes.r8(pc), 0) ? 2 : 1;
for (unsigned i = 1; i <= bytes; i++) {
util::stream_format(stream, "$%02x ", opcodes.r8(pc+i));
}
return bytes;
}
bool db_tx::read(const data_buffer & key, T & value)
{
if (m_Db == 0)
{
return false;
}
Dbt dbt_key(key.data(), static_cast<std::uint32_t> (key.size()));
Dbt dbt_value;
dbt_value.set_flags(DB_DBT_MALLOC);
auto ret = m_Db->get(m_DbTxn, &dbt_key, &dbt_value, 0);
std::memset(dbt_key.get_data(), 0, dbt_key.get_size());
if (dbt_value.get_data() == 0)
{
return false;
}
try
{
/**
* Allocate the data_buffer.
*/
data_buffer buffer(
static_cast<char *>(dbt_value.get_data()), dbt_value.get_size()
);
/**
* Decode the value from the buffer.
*/
value.decode(buffer);
}
catch (std::exception & e)
{
log_error("DB TX read failed, what = " << e.what() << ".");
return false;
}
std::memset(dbt_value.get_data(), 0, dbt_value.get_size());
free(dbt_value.get_data());
return ret == 0;
}
bool alert::decode(data_buffer & buffer)
{
auto len = buffer.read_var_int();
if (len > 0)
{
m_message.resize(len);
buffer.read_bytes(
reinterpret_cast<char *>(&m_message[0]), m_message.size()
);
}
len = buffer.read_var_int();
if (len > 0)
{
m_signature.resize(len);
buffer.read_bytes(
reinterpret_cast<char *>(&m_signature[0]), m_signature.size()
);
}
/**
* If we have a message, decode it.
*/
if (m_message.size() > 0)
{
/**
* Allocate the message buffer.
*/
data_buffer buffer_message;
/**
* Write the message into the buffer.
*/
buffer_message.write_bytes(
reinterpret_cast<const char *>(&m_message[0]), m_message.size()
);
/**
* Decode the message.
*/
alert_unsigned::decode(buffer_message);
}
return true;
}
bool zerotime_lock::decode(data_buffer & buffer)
{
/**
* Decode the version.
*/
m_version = buffer.read_uint32();
assert(m_version == current_version);
/**
* Decode the transaction.
*/
m_transaction.decode(buffer);
/**
* Decode the transaction hash.
*/
buffer.read_bytes(
reinterpret_cast<char *> (m_hash_tx.digest()), sha256::digest_length
);
assert(m_transaction.get_hash() == m_hash_tx);
/**
* Decode the expiration.
*/
m_expiration = buffer.read_uint64();
/**
* Enforce the expiration.
*/
if (
m_expiration < time::instance().get_adjusted() + interval_min_expire ||
m_expiration > time::instance().get_adjusted() + interval_max_expire
)
{
m_expiration = time::instance().get_adjusted() + interval_min_expire;
}
/**
* No signature is required because:
* 1. The receiver may want to lock a non-zerotime transaction.
* 2. It causes no harm to let other's lock the transaction.
* 3. It conserves bandwidth and processing power.
*/
return m_transaction.get_hash() == m_hash_tx;
}
offs_t capricorn_disassembler::disassemble(std::ostream &stream, offs_t pc, const data_buffer &opcodes, const data_buffer ¶ms)
{
const dis_entry_t *p;
uint8_t opcode = opcodes.r8(pc);
for (p = dis_table; p->m_op_mask; p++) {
if ((opcode & p->m_op_mask) == p->m_opcode) {
offs_t res = 1 | p->m_dasm_flags | SUPPORTED;
stream << p->m_mnemonic;
if (p->m_has_mb) {
stream << (BIT(opcode, 0) ? 'M' : 'B');
}
if (p->m_addr_mode != '\0') {
stream << p->m_addr_mode;
}
if (p->m_param_fn != nullptr) {
stream << " ";
res += (this->*(p->m_param_fn))(stream, pc, opcodes);
}
return res;
}
}
// Unknown opcode
stream << "???";
return 1 | SUPPORTED;
}
offs_t arc_disassembler::disassemble(std::ostream &stream, offs_t pc, const data_buffer &opcodes, const data_buffer ¶ms)
{
uint32_t op = opcodes.r32(pc);
uint8_t opcode = ARC_OPERATION;
switch (opcode)
{
case 0x04: // B
case 0x05: // BL
util::stream_format(stream, "%s(%s)(%s) %08x", basic[opcode], conditions[ARC_CONDITION], delaytype[ARC_BRANCH_DELAY], (ARC_BRANCH_ADDR<<2)+pc+4);
break;
case 0x08: // ADD
// todo, short / long immediate formats
util::stream_format(stream, "%s %s , %s , %s (%08x)", basic[opcode], regnames[ARC_REGOP_DEST], regnames[ARC_REGOP_OP1], regnames[ARC_REGOP_OP2], op &~ 0xfffffe00);
break;
default:
util::stream_format(stream, "%s (%08x)", basic[opcode], op &~ 0xf8000000);
break;
}
return 4 | SUPPORTED;
}
bool create(data_buffer& buffer, index123_type& index123)
{
data_pointer ptr = buffer.allocate(1);
*ptr = generate();
auto itr = index123.find( ptr.get_offset() );
if (itr == index123.end())
{
index123.insert( ptr.get_offset() );
}
else
{
buffer.deallocate(ptr, 1);
}
return itr == index123.end();
}
bool packedmessage_scan<MessageType>::pack(data_buffer& buffer)const
{
if(!msgs)
return false;
unsigned msg_size = msgs->ByteSize();
buffer.resize(HEADER_SIZE + msg_size);
//Included header file.
encode_header(buffer, msg_size);
LOG(INFO)<<" Pack message, msg_size : "<<
msg_size <<", buffer : "<<buffer.size();
return msgs->SerializeToArray(&buffer[HEADER_SIZE], msg_size);
}
bool incentive_vote::sign(data_buffer & buffer)
{
auto ret = false;
/**
* Calculate the hash of the nonce hash.
*/
auto digest = hash::sha256d(
m_hash_nonce.digest(), sha256::digest_length
);
/**
* Hash the encoded message buffer.
*/
sha256 hash_value = sha256::from_digest(&digest[0]);
if (incentive::instance().sign(hash_value, m_signature) == true)
{
/**
* Write the signature length.
*/
buffer.write_var_int(m_signature.size());
/**
* Write the signature.
*/
buffer.write_bytes(
reinterpret_cast<char *>(&m_signature[0]),
m_signature.size()
);
log_debug(
"Incentive vote signed value (" <<
hash_value.to_string().substr(0, 8) << ")."
);
ret = true;
}
else
{
log_error("Incentive vote failed to sign value.");
}
return ret;
}
bool incentive_answer::verify(data_buffer & buffer)
{
auto ret = false;
/**
* Hash the encoded message buffer.
*/
sha256 hash_value = m_public_key.get_hash();
/**
* Read the signature.
*/
auto signature_len = buffer.read_var_int();
if (signature_len > 0)
{
m_signature.resize(signature_len);
buffer.read_bytes(
reinterpret_cast<char *>(&m_signature[0]), m_signature.size()
);
if (
incentive::instance().verify(
m_public_key, hash_value, m_signature) == true
)
{
ret = true;
log_debug(
"Incentive answer verified value (" <<
hash_value.to_string().substr(0, 8) << ")."
);
}
else
{
log_error(
"Incentive answer failed to verify value (" <<
hash_value.to_string().substr(0, 8) << ")."
);
}
}
return ret;
}
offs_t capricorn_disassembler::param_jmp_off(std::ostream &stream, offs_t pc, const data_buffer &opcodes)
{
uint16_t off = opcodes.r8(pc+1);
if (BIT(off, 7)) {
off -= 0x100;
}
util::stream_format(stream, "$%04x", (pc + 2 + off) & 0xffff);
return 1;
}
void incentive_answer::encode(data_buffer & buffer, const bool & is_copy )
{
/**
* Encode the version.
*/
buffer.write_uint32(m_version);
/**
* Encode the public key.
*/
m_public_key.encode(buffer);
/**
* Encode the transaction_in.
*/
m_transaction_in.encode(buffer);
/**
* If we are encoding a copy reuse the existing signature.
*/
if (is_copy == true)
{
/**
* Write the signature length.
*/
buffer.write_var_int(m_signature.size());
/**
* Write the signature.
*/
buffer.write_bytes(
reinterpret_cast<char *>(&m_signature[0]),
m_signature.size()
);
}
else
{
/**
* Sign the message.
*/
sign(buffer);
}
}
bool init(data_buffer& buffer, index123_type& index123)
{
for (int i = 0; i < TEST_COUNT; )
{
if ( create(buffer, index123) )
{
++i;
if (i % 1000 == 0)
{
buffer.buffer().reserve( buffer.buffer().size() + 100);
if( !check(buffer, index123) )
{
return false;
}
}
}
}
return true;
}
void transaction::encode(
data_buffer & buffer, const bool & encode_version
) const
{
if (encode_version)
{
/**
* Write the version.
*/
buffer.write_uint32(m_version);
}
/**
* Write the time.
*/
buffer.write_uint32(m_time);
/**
* Write the m_transactions_in size.
*/
buffer.write_var_int(m_transactions_in.size());
for (auto & i : m_transactions_in)
{
i.encode(buffer);
}
/**
* Write the m_transactions_out size.
*/
buffer.write_var_int(m_transactions_out.size());
for (auto & i : m_transactions_out)
{
i.encode(buffer);
}
/**
* Write the time lock.
*/
buffer.write_uint32(m_time_lock);
}
