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<?php |
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namespace BitWasp\Bitcoin\Script\Interpreter; |
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use BitWasp\Bitcoin\Crypto\EcAdapter\Adapter\EcAdapterInterface; |
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use BitWasp\Bitcoin\Crypto\Hash; |
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use BitWasp\Bitcoin\Exceptions\SignatureNotCanonical; |
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use BitWasp\Bitcoin\Exceptions\ScriptRuntimeException; |
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use BitWasp\Bitcoin\Crypto\EcAdapter\Impl\PhpEcc\Key\PublicKey; |
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use BitWasp\Bitcoin\Script\Classifier\OutputClassifier; |
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use BitWasp\Bitcoin\Script\Opcodes; |
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use BitWasp\Bitcoin\Script\Script; |
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use BitWasp\Bitcoin\Script\ScriptFactory; |
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use BitWasp\Bitcoin\Script\ScriptInterface; |
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use BitWasp\Bitcoin\Script\ScriptWitness; |
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use BitWasp\Bitcoin\Script\WitnessProgram; |
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use BitWasp\Bitcoin\Signature\TransactionSignature; |
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use BitWasp\Bitcoin\Transaction\SignatureHash\SigHash; |
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use BitWasp\Bitcoin\Transaction\TransactionInputInterface; |
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use BitWasp\Bitcoin\Transaction\TransactionInterface; |
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use BitWasp\Buffertools\Buffer; |
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use BitWasp\Buffertools\BufferInterface; |
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class Interpreter implements InterpreterInterface |
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{ |
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/** |
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* Position of OP_CODESEPARATOR, for calculating SigHash |
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* @var int |
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*/ |
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private $hashStartPos; |
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/** |
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* @var int |
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*/ |
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private $opCount; |
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/** |
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* @var EcAdapterInterface |
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*/ |
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private $ecAdapter; |
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/** |
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* @var \BitWasp\Bitcoin\Math\Math |
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*/ |
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private $math; |
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/** |
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* @var Buffer |
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*/ |
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private $vchFalse; |
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/** |
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* @var Buffer |
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*/ |
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private $vchTrue; |
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/** |
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* @var Buffer |
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*/ |
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private $int0; |
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/** |
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* @var Buffer |
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*/ |
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private $int1; |
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/** |
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* @var array |
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*/ |
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private $disabledOps = [ |
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Opcodes::OP_CAT, Opcodes::OP_SUBSTR, Opcodes::OP_LEFT, Opcodes::OP_RIGHT, |
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Opcodes::OP_INVERT, Opcodes::OP_AND, Opcodes::OP_OR, Opcodes::OP_XOR, |
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Opcodes::OP_2MUL, Opcodes::OP_2DIV, Opcodes::OP_MUL, Opcodes::OP_DIV, |
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Opcodes::OP_MOD, Opcodes::OP_LSHIFT, Opcodes::OP_RSHIFT |
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]; |
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/** |
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* @param EcAdapterInterface $ecAdapter |
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* @param TransactionInterface $transaction |
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*/ |
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public function __construct(EcAdapterInterface $ecAdapter, TransactionInterface $transaction) |
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{ |
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$this->ecAdapter = $ecAdapter; |
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$this->math = $ecAdapter->getMath(); |
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$this->vchFalse = new Buffer("", 0, $this->math); |
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$this->vchTrue = new Buffer("\x01", 1, $this->math); |
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$this->int0 = Number::buffer($this->vchFalse, false, 4, $this->math)->getBuffer(); |
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$this->int1 = Number::buffer($this->vchTrue, false, 1, $this->math)->getBuffer(); |
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} |
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/** |
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* Cast the value to a boolean |
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* |
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* @param BufferInterface $value |
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* @return bool |
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*/ |
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public function castToBool(BufferInterface $value) |
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{ |
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$val = $value->getBinary(); |
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for ($i = 0, $size = strlen($val); $i < $size; $i++) { |
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$chr = ord($val[$i]); |
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if ($chr != 0) { |
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if ($i == ($size - 1) && $chr == 0x80) { |
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return false; |
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} |
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return true; |
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} |
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} |
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return false; |
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} |
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/** |
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* @param BufferInterface $signature |
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* @return bool |
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*/ |
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public function isValidSignatureEncoding(BufferInterface $signature) |
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{ |
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try { |
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756 |
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TransactionSignature::isDERSignature($signature); |
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return true; |
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756 |
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} catch (SignatureNotCanonical $e) { |
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756 |
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/* In any case, we will return false outside this block */ |
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} |
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return false; |
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} |
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756 |
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756 |
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/** |
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* @param BufferInterface $signature |
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* @return bool |
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* @throws ScriptRuntimeException |
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* @throws \Exception |
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*/ |
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public function isLowDerSignature(BufferInterface $signature) |
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{ |
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if (!$this->isValidSignatureEncoding($signature)) { |
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throw new ScriptRuntimeException(self::VERIFY_DERSIG, 'Signature with incorrect encoding'); |
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} |
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$binary = $signature->getBinary(); |
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$nLenR = ord($binary[3]); |
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$nLenS = ord($binary[5 + $nLenR]); |
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$s = $signature->slice(6 + $nLenR, $nLenS)->getInt(); |
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return $this->ecAdapter->validateSignatureElement($s, true); |
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} |
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/** |
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* Determine whether the sighash byte appended to the signature encodes |
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* a valid sighash type. |
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* |
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* @param BufferInterface $signature |
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* @return bool |
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*/ |
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public function isDefinedHashtypeSignature(BufferInterface $signature) |
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{ |
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if ($signature->getSize() === 0) { |
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return false; |
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} |
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$binary = $signature->getBinary(); |
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$nHashType = ord(substr($binary, -1)) & (~(SigHash::ANYONECANPAY)); |
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$math = $this->math; |
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return ! ($math->cmp($nHashType, SigHash::ALL) < 0 || $math->cmp($nHashType, SigHash::SINGLE) > 0); |
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} |
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/** |
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* @param int $opCode |
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* @param BufferInterface $pushData |
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* @return bool |
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* @throws \Exception |
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*/ |
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public function checkMinimalPush($opCode, BufferInterface $pushData) |
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{ |
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$pushSize = $pushData->getSize(); |
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$binary = $pushData->getBinary(); |
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if ($pushSize === 0) { |
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return $opCode === Opcodes::OP_0; |
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} elseif ($pushSize === 1) { |
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$first = ord($binary[0]); |
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if ($first >= 1 && $first <= 16) { |
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return $opCode === (Opcodes::OP_1 + ($first - 1)); |
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} elseif ($first === 0x81) { |
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return $opCode === Opcodes::OP_1NEGATE; |
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} |
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} elseif ($pushSize <= 75) { |
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return $opCode === $pushSize; |
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} elseif ($pushSize <= 255) { |
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return $opCode === Opcodes::OP_PUSHDATA1; |
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} elseif ($pushSize <= 65535) { |
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return $opCode === Opcodes::OP_PUSHDATA2; |
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} |
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return true; |
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} |
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/** |
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* @return $this |
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* @throws \Exception |
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*/ |
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private function checkOpcodeCount() |
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{ |
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if ($this->math->cmp($this->opCount, 201) > 0) { |
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throw new \RuntimeException('Error: Script op code count'); |
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} |
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return $this; |
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} |
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60 |
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/** |
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* @param WitnessProgram $witnessProgram |
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* @param ScriptWitness $scriptWitness |
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* @param int $flags |
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* @param Checker $checker |
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* @return bool |
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42 |
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*/ |
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private function verifyWitnessProgram(WitnessProgram $witnessProgram, ScriptWitness $scriptWitness, $flags, Checker $checker) |
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{ |
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$witnessCount = count($scriptWitness); |
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if ($witnessProgram->getVersion() == 0) { |
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$buffer = $witnessProgram->getProgram(); |
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30 |
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if ($buffer->getSize() === 32) { |
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// Version 0 segregated witness program: SHA256(Script) in program, Script + inputs in witness |
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if ($witnessCount === 0) { |
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// Must contain script at least |
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return false; |
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} |
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$scriptPubKey = new Script($scriptWitness[$witnessCount - 1]); |
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$stackValues = $scriptWitness->slice(0, -1); |
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$hashScriptPubKey = Hash::sha256($scriptWitness[$witnessCount - 1]); |
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24 |
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if ($hashScriptPubKey == $buffer) { |
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return false; |
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} |
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18 |
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} elseif ($buffer->getSize() === 20) { |
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// Version 0 special case for pay-to-pubkeyhash |
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if ($witnessCount !== 2) { |
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// 2 items in witness - <signature> <pubkey> |
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return false; |
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} |
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$scriptPubKey = ScriptFactory::create()->sequence([Opcodes::OP_DUP, Opcodes::OP_HASH160, $buffer, Opcodes::OP_EQUALVERIFY, Opcodes::OP_CHECKSIG])->getScript(); |
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$stackValues = $scriptWitness; |
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6 |
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} else { |
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return false; |
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6 |
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} |
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6 |
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} elseif ($flags & self::VERIFY_DISCOURAGE_UPGRADABLE_WITNESS_PROGRAM) { |
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return false; |
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6 |
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} else { |
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return false; |
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6 |
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} |
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258
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$mainStack = new Stack(); |
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foreach ($stackValues as $value) { |
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260
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$mainStack->push($value); |
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} |
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262
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263
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6 |
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if (!$this->evaluate($scriptPubKey, $mainStack, 1, $flags, $checker)) { |
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264
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6 |
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return false; |
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265
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} |
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266
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267
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if ($mainStack->count() !== 1) { |
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268
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return false; |
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269
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} |
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270
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271
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if (!$this->castToBool($mainStack->bottom())) { |
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272
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return false; |
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273
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} |
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274
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275
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return true; |
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276
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} |
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277
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278
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672 |
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/** |
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279
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* @param ScriptInterface $scriptSig |
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280
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672 |
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* @param ScriptInterface $scriptPubKey |
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281
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6 |
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* @param int $flags |
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282
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* @param Checker $checker |
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283
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* @param ScriptWitness|null $witness |
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284
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672 |
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* @return bool |
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285
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*/ |
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286
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public function verify(ScriptInterface $scriptSig, ScriptInterface $scriptPubKey, $flags, Checker $checker, ScriptWitness $witness = null) |
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287
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{ |
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288
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static $emptyWitness = null; |
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289
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if ($emptyWitness === null) { |
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290
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$emptyWitness = new ScriptWitness([]); |
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291
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} |
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292
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|
293
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$witness = $witness ?: $emptyWitness; |
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294
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295
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18 |
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if (($flags & self::VERIFY_SIGPUSHONLY) != 0 && !$scriptSig->isPushOnly()) { |
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296
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return false; |
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297
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18 |
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} |
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298
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18 |
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299
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12 |
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$stack = new Stack(); |
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300
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if (!$this->evaluate($scriptSig, $stack, 0, $flags, $checker)) { |
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301
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return false; |
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302
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12 |
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} |
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303
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12 |
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304
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$stackCopy = new Stack; |
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305
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12 |
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if ($flags & self::VERIFY_P2SH) { |
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306
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12 |
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$stackCopy = clone $stack; |
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307
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12 |
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} |
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308
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12 |
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309
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12 |
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if (!$this->evaluate($scriptPubKey, $stack, 0, $flags, $checker)) { |
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310
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return false; |
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311
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} |
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312
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313
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if ($stack->isEmpty()) { |
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314
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return false; |
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315
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} |
|
316
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317
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if (false === $this->castToBool($stack[-1])) { |
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318
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return false; |
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319
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} |
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320
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|
321
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$program = null; |
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322
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|
323
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if ($flags & self::VERIFY_WITNESS) { |
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324
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325
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|
|
if ($scriptPubKey->isWitness($program)) { |
|
|
|
|
|
|
326
|
|
|
/** @var WitnessProgram $program */ |
|
327
|
|
|
if ($scriptSig->getBuffer()->getSize() !== 0) { |
|
328
|
|
|
return false; |
|
329
|
|
|
} |
|
330
|
|
|
|
|
331
|
|
|
if (!$this->verifyWitnessProgram($program, $witness, $flags, $checker)) { |
|
|
|
|
|
|
332
|
|
|
return false; |
|
333
|
|
|
} |
|
334
|
|
|
|
|
335
|
|
|
$stack->resize(1); |
|
336
|
|
|
} |
|
337
|
|
|
} |
|
338
|
|
|
|
|
339
|
|
|
if ($flags & self::VERIFY_P2SH && (new OutputClassifier($scriptPubKey))->isPayToScriptHash()) { |
|
340
|
|
|
|
|
341
|
|
|
if (!$scriptSig->isPushOnly()) { |
|
342
|
|
|
return false; |
|
343
|
|
|
} |
|
344
|
|
|
|
|
345
|
|
|
// Restore mainStack to how it was after evaluating scriptSig |
|
346
|
|
|
$stack = $stackCopy; |
|
347
|
|
|
if ($stack->isEmpty()) { |
|
348
|
|
|
return false; |
|
349
|
|
|
} |
|
350
|
|
|
|
|
351
|
|
|
// Load redeemscript as the scriptPubKey |
|
352
|
|
|
$scriptPubKey = new Script($stack->bottom()); |
|
353
|
|
|
$stack->pop(); |
|
354
|
|
|
|
|
355
|
|
|
if (!$this->evaluate($scriptPubKey, $stack, 0, $flags, $checker)) { |
|
356
|
|
|
return false; |
|
357
|
|
|
} |
|
358
|
|
|
|
|
359
|
|
|
if ($stack->isEmpty()) { |
|
360
|
|
|
return false; |
|
361
|
|
|
} |
|
362
|
|
|
|
|
363
|
|
|
if (!$this->castToBool($stack->bottom())) { |
|
364
|
|
|
return false; |
|
365
|
|
|
} |
|
366
|
|
|
|
|
367
|
|
|
if ($flags & self::VERIFY_WITNESS) { |
|
368
|
|
|
|
|
369
|
|
|
if ($scriptPubKey->isWitness($program)) { |
|
370
|
|
|
|
|
371
|
|
|
if ($scriptSig != (ScriptFactory::create()->push($scriptPubKey->getBuffer())->getScript())) { |
|
372
|
|
|
return false; // SCRIPT_ERR_WITNESS_MALLEATED_P2SH |
|
373
|
|
|
} |
|
374
|
|
|
|
|
375
|
|
|
if (!$this->verifyWitnessProgram($program, $witness, $flags, $checker)) { |
|
|
|
|
|
|
376
|
684 |
|
return false; |
|
377
|
|
|
} |
|
378
|
684 |
|
|
|
379
|
684 |
|
$stack->resize(1); |
|
380
|
|
|
} |
|
381
|
|
|
} |
|
382
|
|
|
} |
|
383
|
684 |
|
|
|
384
|
684 |
|
if ($flags & self::VERIFY_CLEAN_STACK != 0) { |
|
385
|
156 |
|
if (!($flags & self::VERIFY_P2SH != 0 && $flags & self::VERIFY_WITNESS != 0)) { |
|
386
|
156 |
|
return false; // implied flags required |
|
387
|
|
|
} |
|
388
|
684 |
|
|
|
389
|
258 |
|
if (count($stack) != 1) { |
|
390
|
|
|
return false; // Cleanstack |
|
391
|
|
|
} |
|
392
|
426 |
|
} |
|
393
|
|
|
|
|
394
|
|
|
if ($flags & self::VERIFY_WITNESS) { |
|
395
|
|
|
if (!$flags & self::VERIFY_P2SH) { |
|
396
|
426 |
|
return false; // |
|
397
|
|
|
} |
|
398
|
|
|
|
|
399
|
|
|
if ($program === null && !$witness->isNull()) { |
|
400
|
426 |
|
return false; // SCRIPT_ERR_WITNESS_UNEXPECTED |
|
401
|
6 |
|
} |
|
402
|
|
|
} |
|
403
|
|
|
|
|
404
|
|
|
return true; |
|
405
|
|
|
} |
|
406
|
6 |
|
|
|
407
|
6 |
|
/** |
|
408
|
|
|
* @param Stack $vfStack |
|
409
|
|
|
* @return bool |
|
410
|
|
|
*/ |
|
411
|
|
|
private function checkExec(Stack $vfStack) |
|
412
|
6 |
|
{ |
|
413
|
6 |
|
$c = 0; |
|
414
|
|
|
$len = $vfStack->end(); |
|
415
|
6 |
|
for ($i = 0; $i < $len; $i++) { |
|
416
|
|
|
if ($vfStack[0 - $len - $i] === true) { |
|
417
|
|
|
$c++; |
|
418
|
6 |
|
} |
|
419
|
|
|
} |
|
420
|
426 |
|
return !(bool)$c; |
|
421
|
|
|
} |
|
422
|
|
|
|
|
423
|
|
|
/** |
|
424
|
|
|
* @param ScriptInterface $script |
|
425
|
|
|
* @param Stack $mainStack |
|
426
|
684 |
|
* @param int $sigVersion |
|
427
|
|
|
* @param int $flags |
|
428
|
684 |
|
* @param Checker $checker |
|
429
|
684 |
|
* @return bool |
|
430
|
684 |
|
*/ |
|
431
|
|
|
public function evaluate(ScriptInterface $script, Stack $mainStack, $sigVersion, $flags, Checker $checker) |
|
432
|
|
|
{ |
|
433
|
|
|
$math = $this->math; |
|
434
|
|
|
$this->hashStartPos = 0; |
|
435
|
684 |
|
$this->opCount = 0; |
|
436
|
|
|
$altStack = new Stack(); |
|
437
|
|
|
$vfStack = new Stack(); |
|
438
|
|
|
$parser = $script->getScriptParser(); |
|
439
|
|
|
|
|
440
|
|
|
if ($script->getBuffer()->getSize() > 10000) { |
|
441
|
|
|
return false; |
|
442
|
684 |
|
} |
|
443
|
|
|
|
|
444
|
684 |
|
try { |
|
445
|
684 |
|
foreach ($parser as $operation) { |
|
446
|
684 |
|
$opCode = $operation->getOp(); |
|
447
|
684 |
|
$pushData = $operation->getData(); |
|
448
|
|
|
$fExec = $this->checkExec($vfStack); |
|
449
|
684 |
|
|
|
450
|
|
|
// If pushdata was written to, |
|
451
|
|
|
if ($operation->isPush() && $operation->getDataSize() > InterpreterInterface::MAX_SCRIPT_ELEMENT_SIZE) { |
|
452
|
|
|
throw new \RuntimeException('Error - push size'); |
|
453
|
|
|
} |
|
454
|
684 |
|
|
|
455
|
684 |
|
// OP_RESERVED should not count towards opCount |
|
456
|
684 |
|
if ($opCode > Opcodes::OP_16 && ++$this->opCount) { |
|
457
|
684 |
|
$this->checkOpcodeCount(); |
|
458
|
|
|
} |
|
459
|
|
|
|
|
460
|
684 |
|
if (in_array($opCode, $this->disabledOps, true)) { |
|
461
|
|
|
throw new \RuntimeException('Disabled Opcode'); |
|
462
|
|
|
} |
|
463
|
|
|
|
|
464
|
|
|
if ($fExec && $operation->isPush()) { |
|
465
|
684 |
|
// In range of a pushdata opcode |
|
466
|
672 |
|
if ($flags & self::VERIFY_MINIMALDATA && !$this->checkMinimalPush($opCode, $pushData)) { |
|
467
|
672 |
|
throw new ScriptRuntimeException(self::VERIFY_MINIMALDATA, 'Minimal pushdata required'); |
|
468
|
|
|
} |
|
469
|
684 |
|
|
|
470
|
12 |
|
$mainStack->push($pushData); |
|
471
|
|
|
// echo " - [pushed '" . $pushData->getHex() . "']\n"; |
|
472
|
|
|
} elseif ($fExec || ($opCode !== Opcodes::OP_IF && $opCode !== Opcodes::OP_ENDIF)) { |
|
473
|
684 |
|
// echo "OPCODE - " . $script->getOpcodes()->getOp($opCode) . "\n"; |
|
474
|
|
|
switch ($opCode) { |
|
475
|
426 |
|
case Opcodes::OP_1NEGATE: |
|
476
|
6 |
|
case Opcodes::OP_1: |
|
477
|
|
|
case Opcodes::OP_2: |
|
478
|
|
|
case Opcodes::OP_3: |
|
479
|
420 |
|
case Opcodes::OP_4: |
|
480
|
|
|
case Opcodes::OP_5: |
|
481
|
678 |
|
case Opcodes::OP_6: |
|
482
|
|
|
case Opcodes::OP_7: |
|
483
|
|
|
case Opcodes::OP_8: |
|
484
|
660 |
|
case Opcodes::OP_9: |
|
485
|
660 |
|
case Opcodes::OP_10: |
|
486
|
660 |
|
case Opcodes::OP_11: |
|
487
|
660 |
|
case Opcodes::OP_12: |
|
488
|
660 |
|
case Opcodes::OP_13: |
|
489
|
660 |
|
case Opcodes::OP_14: |
|
490
|
660 |
|
case Opcodes::OP_15: |
|
491
|
660 |
|
case Opcodes::OP_16: |
|
492
|
660 |
|
$num = decodeOpN($opCode); |
|
493
|
660 |
|
$mainStack->push(Number::int($num)->getBuffer()); |
|
494
|
660 |
|
break; |
|
495
|
660 |
|
|
|
496
|
660 |
|
case Opcodes::OP_CHECKLOCKTIMEVERIFY: |
|
497
|
660 |
|
if (!$flags & self::VERIFY_CHECKLOCKTIMEVERIFY) { |
|
498
|
660 |
|
if ($flags & self::VERIFY_DISCOURAGE_UPGRADABLE_NOPS) { |
|
499
|
660 |
|
throw new ScriptRuntimeException(self::VERIFY_DISCOURAGE_UPGRADABLE_NOPS, 'Upgradable NOP found - this is discouraged'); |
|
500
|
660 |
|
} |
|
501
|
192 |
|
break; |
|
502
|
192 |
|
} |
|
503
|
192 |
|
|
|
504
|
|
|
if ($mainStack->isEmpty()) { |
|
505
|
660 |
|
throw new \RuntimeException('Invalid stack operation - CLTV'); |
|
506
|
|
|
} |
|
507
|
|
|
|
|
508
|
|
|
$lockTime = Number::buffer($mainStack[-1], $flags & self::VERIFY_MINIMALDATA, 5, $math); |
|
|
|
|
|
|
509
|
|
|
if (!$checker->checkLockTime($lockTime)) { |
|
510
|
|
|
throw new ScriptRuntimeException(self::VERIFY_CHECKLOCKTIMEVERIFY, 'Unsatisfied locktime'); |
|
511
|
|
|
} |
|
512
|
|
|
|
|
513
|
|
|
break; |
|
514
|
|
|
|
|
515
|
|
|
case Opcodes::OP_CHECKSEQUENCEVERIFY: |
|
516
|
|
|
if (!$flags & self::VERIFY_CHECKSEQUENCEVERIFY) { |
|
517
|
|
|
if ($flags & self::VERIFY_DISCOURAGE_UPGRADABLE_NOPS) { |
|
518
|
|
|
throw new ScriptRuntimeException(self::VERIFY_DISCOURAGE_UPGRADABLE_NOPS, 'Upgradable NOP found - this is discouraged'); |
|
519
|
|
|
} |
|
520
|
|
|
break; |
|
521
|
|
|
} |
|
522
|
|
|
|
|
523
|
|
|
if ($mainStack->isEmpty()) { |
|
524
|
660 |
|
throw new \RuntimeException('Invalid stack operation - CSV'); |
|
525
|
|
|
} |
|
526
|
|
|
|
|
527
|
|
|
$sequence = Number::buffer($mainStack[-1], $flags & self::VERIFY_MINIMALDATA, 5, $math); |
|
|
|
|
|
|
528
|
|
|
$nSequence = $sequence->getInt(); |
|
529
|
|
|
if ($math->cmp($nSequence, 0) < 0) { |
|
530
|
|
|
throw new ScriptRuntimeException(self::VERIFY_CHECKSEQUENCEVERIFY, 'Negative locktime'); |
|
531
|
|
|
} |
|
532
|
|
|
|
|
533
|
|
|
if ($math->cmp($math->bitwiseAnd($nSequence, TransactionInputInterface::SEQUENCE_LOCKTIME_DISABLE_FLAG), '0') !== 0) { |
|
534
|
|
|
break; |
|
535
|
|
|
} |
|
536
|
|
|
|
|
537
|
|
|
if (!$checker->checkSequence($sequence)) { |
|
538
|
|
|
throw new ScriptRuntimeException(self::VERIFY_CHECKSEQUENCEVERIFY, 'Unsatisfied locktime'); |
|
539
|
|
|
} |
|
540
|
|
|
break; |
|
541
|
|
|
|
|
542
|
|
|
case Opcodes::OP_NOP1: |
|
543
|
|
|
case Opcodes::OP_NOP4: |
|
544
|
|
|
case Opcodes::OP_NOP5: |
|
545
|
|
|
case Opcodes::OP_NOP6: |
|
546
|
|
|
case Opcodes::OP_NOP7: |
|
547
|
|
|
case Opcodes::OP_NOP8: |
|
548
|
|
|
case Opcodes::OP_NOP9: |
|
549
|
|
|
case Opcodes::OP_NOP10: |
|
550
|
|
|
if ($flags & self::VERIFY_DISCOURAGE_UPGRADABLE_NOPS) { |
|
551
|
660 |
|
throw new ScriptRuntimeException(self::VERIFY_DISCOURAGE_UPGRADABLE_NOPS, 'Upgradable NOP found - this is discouraged'); |
|
552
|
660 |
|
} |
|
553
|
660 |
|
break; |
|
554
|
660 |
|
|
|
555
|
660 |
|
case Opcodes::OP_NOP: |
|
556
|
660 |
|
break; |
|
557
|
660 |
|
|
|
558
|
660 |
|
case Opcodes::OP_IF: |
|
559
|
6 |
|
case Opcodes::OP_NOTIF: |
|
560
|
6 |
|
// <expression> if [statements] [else [statements]] endif |
|
561
|
|
|
$value = false; |
|
562
|
|
|
if ($fExec) { |
|
563
|
|
|
if ($mainStack->isEmpty()) { |
|
564
|
654 |
|
throw new \RuntimeException('Unbalanced conditional'); |
|
565
|
12 |
|
} |
|
566
|
|
|
// todo |
|
567
|
642 |
|
$buffer = Number::buffer($mainStack->pop(), $flags & self::VERIFY_MINIMALDATA)->getBuffer(); |
|
|
|
|
|
|
568
|
642 |
|
$value = $this->castToBool($buffer); |
|
569
|
|
|
if ($opCode === Opcodes::OP_NOTIF) { |
|
570
|
18 |
|
$value = !$value; |
|
571
|
18 |
|
} |
|
572
|
18 |
|
} |
|
573
|
6 |
|
$vfStack->push($value ? $this->vchTrue : $this->vchFalse); |
|
574
|
|
|
break; |
|
575
|
|
|
|
|
576
|
12 |
|
case Opcodes::OP_ELSE: |
|
577
|
12 |
|
if ($vfStack->isEmpty()) { |
|
578
|
12 |
|
throw new \RuntimeException('Unbalanced conditional'); |
|
579
|
6 |
|
} |
|
580
|
6 |
|
$vfStack[-1] = !$vfStack->end() ? $this->vchTrue : $this->vchFalse; |
|
581
|
12 |
|
break; |
|
582
|
12 |
|
|
|
583
|
12 |
|
case Opcodes::OP_ENDIF: |
|
584
|
|
|
if ($vfStack->isEmpty()) { |
|
585
|
636 |
|
throw new \RuntimeException('Unbalanced conditional'); |
|
586
|
18 |
|
} |
|
587
|
6 |
|
break; |
|
588
|
|
|
|
|
589
|
12 |
|
case Opcodes::OP_VERIFY: |
|
590
|
12 |
|
if ($mainStack->isEmpty()) { |
|
591
|
|
|
throw new \RuntimeException('Invalid stack operation'); |
|
592
|
630 |
|
} |
|
593
|
18 |
|
$value = $this->castToBool($mainStack[-1]); |
|
594
|
6 |
|
if (!$value) { |
|
595
|
|
|
throw new \RuntimeException('Error: verify'); |
|
596
|
12 |
|
} |
|
597
|
|
|
$mainStack->pop(); |
|
598
|
624 |
|
break; |
|
599
|
24 |
|
|
|
600
|
6 |
|
case Opcodes::OP_RESERVED: |
|
601
|
|
|
// todo |
|
602
|
18 |
|
break; |
|
603
|
18 |
|
|
|
604
|
6 |
|
case Opcodes::OP_TOALTSTACK: |
|
605
|
|
|
if ($mainStack->isEmpty()) { |
|
606
|
12 |
|
throw new \RuntimeException('Invalid stack operation OP_TOALTSTACK'); |
|
607
|
12 |
|
} |
|
608
|
|
|
$altStack->push($mainStack->pop()); |
|
609
|
600 |
|
break; |
|
610
|
|
|
|
|
611
|
12 |
|
case Opcodes::OP_FROMALTSTACK: |
|
612
|
|
|
if ($altStack->isEmpty()) { |
|
613
|
588 |
|
throw new \RuntimeException('Invalid alt-stack operation OP_FROMALTSTACK'); |
|
614
|
18 |
|
} |
|
615
|
6 |
|
$mainStack->push($altStack->pop()); |
|
616
|
|
|
break; |
|
617
|
12 |
|
|
|
618
|
12 |
|
case Opcodes::OP_IFDUP: |
|
619
|
|
|
// If top value not zero, duplicate it. |
|
620
|
582 |
|
if ($mainStack->isEmpty()) { |
|
621
|
12 |
|
throw new \RuntimeException('Invalid stack operation OP_IFDUP'); |
|
622
|
6 |
|
} |
|
623
|
|
|
$vch = $mainStack[-1]; |
|
624
|
6 |
|
if ($this->castToBool($vch)) { |
|
625
|
6 |
|
$mainStack->push($vch); |
|
626
|
|
|
} |
|
627
|
576 |
|
break; |
|
628
|
|
|
|
|
629
|
12 |
|
case Opcodes::OP_DEPTH: |
|
630
|
6 |
|
$num = count($mainStack); |
|
631
|
|
|
$depth = Number::int($num)->getBuffer(); |
|
632
|
6 |
|
$mainStack->push($depth); |
|
633
|
6 |
|
break; |
|
634
|
6 |
|
|
|
635
|
6 |
|
case Opcodes::OP_DROP: |
|
636
|
6 |
|
if ($mainStack->isEmpty()) { |
|
637
|
|
|
throw new \RuntimeException('Invalid stack operation OP_DROP'); |
|
638
|
570 |
|
} |
|
639
|
72 |
|
$mainStack->pop(); |
|
640
|
72 |
|
break; |
|
641
|
24 |
|
|
|
642
|
24 |
|
case Opcodes::OP_DUP: |
|
643
|
54 |
|
if ($mainStack->isEmpty()) { |
|
644
|
|
|
throw new \RuntimeException('Invalid stack operation OP_DUP'); |
|
645
|
|
|
} |
|
646
|
72 |
|
$vch = $mainStack[-1]; |
|
647
|
72 |
|
$mainStack->push($vch); |
|
648
|
|
|
break; |
|
649
|
570 |
|
|
|
650
|
6 |
|
case Opcodes::OP_NIP: |
|
651
|
6 |
|
if (count($mainStack) < 2) { |
|
652
|
|
|
throw new \RuntimeException('Invalid stack operation OP_NIP'); |
|
653
|
|
|
} |
|
654
|
|
|
unset($mainStack[-2]); |
|
655
|
|
|
break; |
|
656
|
564 |
|
|
|
657
|
18 |
|
case Opcodes::OP_OVER: |
|
658
|
6 |
|
if (count($mainStack) < 2) { |
|
659
|
|
|
throw new \RuntimeException('Invalid stack operation OP_OVER'); |
|
660
|
12 |
|
} |
|
661
|
12 |
|
$vch = $mainStack[-2]; |
|
662
|
12 |
|
$mainStack->push($vch); |
|
663
|
|
|
break; |
|
664
|
558 |
|
|
|
665
|
18 |
|
case Opcodes::OP_ROT: |
|
666
|
6 |
|
if (count($mainStack) < 3) { |
|
667
|
|
|
throw new \RuntimeException('Invalid stack operation OP_ROT'); |
|
668
|
12 |
|
} |
|
669
|
12 |
|
$mainStack->swap(-3, -2); |
|
670
|
|
|
$mainStack->swap(-2, -1); |
|
671
|
552 |
|
break; |
|
672
|
18 |
|
|
|
673
|
6 |
|
case Opcodes::OP_SWAP: |
|
674
|
|
|
if (count($mainStack) < 2) { |
|
675
|
12 |
|
throw new \RuntimeException('Invalid stack operation OP_SWAP'); |
|
676
|
12 |
|
} |
|
677
|
12 |
|
$mainStack->swap(-2, -1); |
|
678
|
|
|
break; |
|
679
|
546 |
|
|
|
680
|
12 |
|
case Opcodes::OP_TUCK: |
|
681
|
6 |
|
if (count($mainStack) < 2) { |
|
682
|
|
|
throw new \RuntimeException('Invalid stack operation OP_TUCK'); |
|
683
|
6 |
|
} |
|
684
|
6 |
|
$vch = $mainStack[-1]; |
|
685
|
6 |
|
$mainStack->add(count($mainStack) - 1 - 2, $vch); |
|
686
|
|
|
break; |
|
687
|
540 |
|
|
|
688
|
12 |
|
case Opcodes::OP_PICK: |
|
689
|
6 |
|
case Opcodes::OP_ROLL: |
|
690
|
|
|
if (count($mainStack) < 2) { |
|
691
|
6 |
|
throw new \RuntimeException('Invalid stack operation OP_PICK'); |
|
692
|
6 |
|
} |
|
693
|
|
|
|
|
694
|
534 |
|
$n = Number::buffer($mainStack[-1], $flags & self::VERIFY_MINIMALDATA, 4)->getInt(); |
|
|
|
|
|
|
695
|
12 |
|
$mainStack->pop(); |
|
696
|
6 |
|
if ($math->cmp($n, 0) < 0 || $math->cmp($n, count($mainStack)) >= 0) { |
|
697
|
|
|
throw new \RuntimeException('Invalid stack operation OP_PICK'); |
|
698
|
6 |
|
} |
|
699
|
6 |
|
|
|
700
|
|
|
$pos = (int) $math->sub($math->sub(0, $n), 1); |
|
701
|
|
|
$vch = $mainStack[$pos]; |
|
702
|
522 |
|
if ($opCode === Opcodes::OP_ROLL) { |
|
703
|
522 |
|
unset($mainStack[$pos]); |
|
704
|
24 |
|
} |
|
705
|
6 |
|
$mainStack->push($vch); |
|
706
|
|
|
break; |
|
707
|
|
|
|
|
708
|
18 |
|
case Opcodes::OP_2DROP: |
|
709
|
18 |
|
if (count($mainStack) < 2) { |
|
710
|
18 |
|
throw new \RuntimeException('Invalid stack operation OP_2DROP'); |
|
711
|
6 |
|
} |
|
712
|
|
|
$mainStack->pop(); |
|
713
|
|
|
$mainStack->pop(); |
|
714
|
12 |
|
break; |
|
715
|
12 |
|
|
|
716
|
12 |
|
case Opcodes::OP_2DUP: |
|
717
|
6 |
|
if (count($mainStack) < 2) { |
|
718
|
6 |
|
throw new \RuntimeException('Invalid stack operation OP_2DUP'); |
|
719
|
12 |
|
} |
|
720
|
12 |
|
$string1 = $mainStack[-2]; |
|
721
|
|
|
$string2 = $mainStack[-1]; |
|
722
|
510 |
|
$mainStack->push($string1); |
|
723
|
12 |
|
$mainStack->push($string2); |
|
724
|
6 |
|
break; |
|
725
|
|
|
|
|
726
|
6 |
|
case Opcodes::OP_3DUP: |
|
727
|
6 |
|
if (count($mainStack) < 3) { |
|
728
|
6 |
|
throw new \RuntimeException('Invalid stack operation OP_3DUP'); |
|
729
|
|
|
} |
|
730
|
504 |
|
$string1 = $mainStack[-3]; |
|
731
|
18 |
|
$string2 = $mainStack[-2]; |
|
732
|
6 |
|
$string3 = $mainStack[-1]; |
|
733
|
|
|
$mainStack->push($string1); |
|
734
|
12 |
|
$mainStack->push($string2); |
|
735
|
12 |
|
$mainStack->push($string3); |
|
736
|
12 |
|
break; |
|
737
|
12 |
|
|
|
738
|
12 |
|
case Opcodes::OP_2OVER: |
|
739
|
|
|
if (count($mainStack) < 4) { |
|
740
|
498 |
|
throw new \RuntimeException('Invalid stack operation OP_2OVER'); |
|
741
|
18 |
|
} |
|
742
|
6 |
|
$string1 = $mainStack[-4]; |
|
743
|
|
|
$string2 = $mainStack[-3]; |
|
744
|
12 |
|
$mainStack->push($string1); |
|
745
|
12 |
|
$mainStack->push($string2); |
|
746
|
12 |
|
break; |
|
747
|
12 |
|
|
|
748
|
12 |
|
case Opcodes::OP_2ROT: |
|
749
|
12 |
|
if (count($mainStack) < 6) { |
|
750
|
12 |
|
throw new \RuntimeException('Invalid stack operation OP_2ROT'); |
|
751
|
|
|
} |
|
752
|
492 |
|
$string1 = $mainStack[-6]; |
|
753
|
18 |
|
$string2 = $mainStack[-5]; |
|
754
|
6 |
|
unset($mainStack[-6], $mainStack[-5]); |
|
755
|
|
|
$mainStack->push($string1); |
|
756
|
12 |
|
$mainStack->push($string2); |
|
757
|
12 |
|
break; |
|
758
|
12 |
|
|
|
759
|
12 |
|
case Opcodes::OP_2SWAP: |
|
760
|
12 |
|
if (count($mainStack) < 4) { |
|
761
|
|
|
throw new \RuntimeException('Invalid stack operation OP_2SWAP'); |
|
762
|
486 |
|
} |
|
763
|
12 |
|
$mainStack->swap(-3, -1); |
|
764
|
6 |
|
$mainStack->swap(-4, -2); |
|
765
|
|
|
break; |
|
766
|
6 |
|
|
|
767
|
6 |
|
case Opcodes::OP_SIZE: |
|
768
|
6 |
|
if ($mainStack->isEmpty()) { |
|
769
|
6 |
|
throw new \RuntimeException('Invalid stack operation OP_SIZE'); |
|
770
|
6 |
|
} |
|
771
|
6 |
|
// todo: Int sizes? |
|
772
|
|
|
$vch = $mainStack[-1]; |
|
773
|
480 |
|
$mainStack->push(Number::int($vch->getSize())->getBuffer()); |
|
774
|
12 |
|
break; |
|
775
|
6 |
|
|
|
776
|
|
|
case Opcodes::OP_EQUAL: |
|
777
|
6 |
|
case Opcodes::OP_EQUALVERIFY: |
|
778
|
6 |
|
if (count($mainStack) < 2) { |
|
779
|
6 |
|
throw new \RuntimeException('Invalid stack operation OP_EQUAL'); |
|
780
|
|
|
} |
|
781
|
474 |
|
$vch1 = $mainStack[-2]; |
|
782
|
12 |
|
$vch2 = $mainStack[-1]; |
|
783
|
6 |
|
|
|
784
|
|
|
$equal = ($vch1->getBinary() === $vch2->getBinary()); |
|
785
|
|
|
|
|
786
|
6 |
|
$mainStack->pop(); |
|
787
|
6 |
|
$mainStack->pop(); |
|
788
|
6 |
|
$mainStack->push(($equal ? $this->vchTrue : $this->vchFalse)); |
|
789
|
|
|
if ($opCode === Opcodes::OP_EQUALVERIFY) { |
|
790
|
468 |
|
if ($equal) { |
|
791
|
468 |
|
$mainStack->pop(); |
|
792
|
396 |
|
} else { |
|
793
|
6 |
|
throw new \RuntimeException('Error EQUALVERIFY'); |
|
794
|
|
|
} |
|
795
|
390 |
|
} |
|
796
|
390 |
|
|
|
797
|
|
|
break; |
|
798
|
390 |
|
|
|
799
|
|
|
// Arithmetic operations |
|
800
|
390 |
|
case $opCode >= Opcodes::OP_1ADD && $opCode <= Opcodes::OP_0NOTEQUAL: |
|
801
|
390 |
|
if ($mainStack->isEmpty()) { |
|
802
|
390 |
|
throw new \Exception('Invalid stack operation 1ADD-OP_0NOTEQUAL'); |
|
803
|
390 |
|
} |
|
804
|
114 |
|
|
|
805
|
102 |
|
$num = Number::buffer($mainStack[-1], $flags & self::VERIFY_MINIMALDATA)->getInt(); |
|
|
|
|
|
|
806
|
102 |
|
|
|
807
|
12 |
|
if ($opCode === Opcodes::OP_1ADD) { |
|
808
|
|
|
$num = $math->add($num, '1'); |
|
809
|
102 |
|
} elseif ($opCode === Opcodes::OP_1SUB) { |
|
810
|
|
|
$num = $math->sub($num, '1'); |
|
811
|
378 |
|
} elseif ($opCode === Opcodes::OP_2MUL) { |
|
812
|
|
|
$num = $math->mul(2, $num); |
|
813
|
|
|
} elseif ($opCode === Opcodes::OP_NEGATE) { |
|
814
|
282 |
|
$num = $math->sub(0, $num); |
|
815
|
48 |
|
} elseif ($opCode === Opcodes::OP_ABS) { |
|
816
|
6 |
|
if ($math->cmp($num, '0') < 0) { |
|
817
|
|
|
$num = $math->sub(0, $num); |
|
818
|
|
|
} |
|
819
|
42 |
|
} elseif ($opCode === Opcodes::OP_NOT) { |
|
820
|
|
|
$num = (int) $math->cmp($num, '0') === 0; |
|
821
|
42 |
|
} else { |
|
822
|
6 |
|
// is OP_0NOTEQUAL |
|
823
|
42 |
|
$num = (int) ($math->cmp($num, '0') !== 0); |
|
824
|
6 |
|
} |
|
825
|
36 |
|
|
|
826
|
|
|
$mainStack->pop(); |
|
827
|
30 |
|
|
|
828
|
|
|
$buffer = Number::int($num)->getBuffer(); |
|
829
|
30 |
|
|
|
830
|
|
|
$mainStack->push($buffer); |
|
831
|
|
|
break; |
|
832
|
|
|
|
|
833
|
30 |
|
case $opCode >= Opcodes::OP_ADD && $opCode <= Opcodes::OP_MAX: |
|
834
|
18 |
|
if (count($mainStack) < 2) { |
|
835
|
18 |
|
throw new \Exception('Invalid stack operation (OP_ADD - OP_MAX)'); |
|
836
|
|
|
} |
|
837
|
12 |
|
|
|
838
|
|
|
$num1 = Number::buffer($mainStack[-2], $flags & self::VERIFY_MINIMALDATA)->getInt(); |
|
|
|
|
|
|
839
|
|
|
$num2 = Number::buffer($mainStack[-1], $flags & self::VERIFY_MINIMALDATA)->getInt(); |
|
|
|
|
|
|
840
|
42 |
|
|
|
841
|
|
|
if ($opCode === Opcodes::OP_ADD) { |
|
842
|
42 |
|
$num = $math->add($num1, $num2); |
|
843
|
|
|
} else if ($opCode === Opcodes::OP_SUB) { |
|
844
|
42 |
|
$num = $math->sub($num1, $num2); |
|
845
|
42 |
|
} else if ($opCode === Opcodes::OP_BOOLAND) { |
|
846
|
|
|
$num = $math->cmp($num1, '0') !== 0 && $math->cmp($num2, '0') !== 0; |
|
847
|
234 |
|
} else if ($opCode === Opcodes::OP_BOOLOR) { |
|
848
|
150 |
|
$num = $math->cmp($num1, '0') !== 0 || $math->cmp($num2, '0') !== 0; |
|
849
|
24 |
|
} elseif ($opCode === Opcodes::OP_NUMEQUAL) { |
|
850
|
|
|
$num = $math->cmp($num1, $num2) === 0; |
|
851
|
|
|
} elseif ($opCode === Opcodes::OP_NUMEQUALVERIFY) { |
|
852
|
126 |
|
$num = $math->cmp($num1, $num2) === 0; |
|
853
|
126 |
|
} elseif ($opCode === Opcodes::OP_NUMNOTEQUAL) { |
|
854
|
|
|
$num = $math->cmp($num1, $num2) !== 0; |
|
855
|
126 |
|
} elseif ($opCode === Opcodes::OP_LESSTHAN) { |
|
856
|
6 |
|
$num = $math->cmp($num1, $num2) < 0; |
|
857
|
126 |
|
} elseif ($opCode === Opcodes::OP_GREATERTHAN) { |
|
858
|
6 |
|
$num = $math->cmp($num1, $num2) > 0; |
|
859
|
120 |
|
} elseif ($opCode === Opcodes::OP_LESSTHANOREQUAL) { |
|
860
|
12 |
|
$num = $math->cmp($num1, $num2) <= 0; |
|
861
|
114 |
|
} elseif ($opCode === Opcodes::OP_GREATERTHANOREQUAL) { |
|
862
|
18 |
|
$num = $math->cmp($num1, $num2) >= 0; |
|
863
|
102 |
|
} elseif ($opCode === Opcodes::OP_MIN) { |
|
864
|
18 |
|
$num = ($math->cmp($num1, $num2) <= 0) ? $num1 : $num2; |
|
865
|
84 |
|
} else { |
|
866
|
|
|
$num = ($math->cmp($num1, $num2) >= 0) ? $num1 : $num2; |
|
867
|
66 |
|
} |
|
868
|
6 |
|
|
|
869
|
66 |
|
$mainStack->pop(); |
|
870
|
12 |
|
$mainStack->pop(); |
|
871
|
60 |
|
$buffer = Number::int($num)->getBuffer(); |
|
872
|
12 |
|
$mainStack->push($buffer); |
|
873
|
48 |
|
|
|
874
|
12 |
|
if ($opCode === Opcodes::OP_NUMEQUALVERIFY) { |
|
875
|
36 |
|
if ($this->castToBool($mainStack[-1])) { |
|
876
|
12 |
|
$mainStack->pop(); |
|
877
|
24 |
|
} else { |
|
878
|
6 |
|
throw new \RuntimeException('NUM EQUAL VERIFY error'); |
|
879
|
6 |
|
} |
|
880
|
6 |
|
} |
|
881
|
|
|
break; |
|
882
|
|
|
|
|
883
|
126 |
|
case Opcodes::OP_WITHIN: |
|
884
|
126 |
|
if (count($mainStack) < 3) { |
|
885
|
126 |
|
throw new \RuntimeException('Invalid stack operation'); |
|
886
|
126 |
|
} |
|
887
|
|
|
|
|
888
|
126 |
|
$num1 = Number::buffer($mainStack[-3], $flags & self::VERIFY_MINIMALDATA)->getInt(); |
|
|
|
|
|
|
889
|
|
|
$num2 = Number::buffer($mainStack[-2], $flags & self::VERIFY_MINIMALDATA)->getInt(); |
|
|
|
|
|
|
890
|
|
|
$num3 = Number::buffer($mainStack[-1], $flags & self::VERIFY_MINIMALDATA)->getInt(); |
|
|
|
|
|
|
891
|
|
|
|
|
892
|
|
|
$value = $math->cmp($num2, $num1) <= 0 && $math->cmp($num1, $num3) < 0; |
|
893
|
|
|
$mainStack->pop(); |
|
894
|
|
|
$mainStack->pop(); |
|
895
|
126 |
|
$mainStack->pop(); |
|
896
|
|
|
$mainStack->push($value ? $this->vchTrue : $this->vchFalse); |
|
897
|
84 |
|
break; |
|
898
|
12 |
|
|
|
899
|
6 |
|
// Hash operation |
|
900
|
|
|
case Opcodes::OP_RIPEMD160: |
|
901
|
|
|
case Opcodes::OP_SHA1: |
|
902
|
6 |
|
case Opcodes::OP_SHA256: |
|
903
|
6 |
|
case Opcodes::OP_HASH160: |
|
904
|
6 |
|
case Opcodes::OP_HASH256: |
|
905
|
|
|
if ($mainStack->isEmpty()) { |
|
906
|
6 |
|
throw new \RuntimeException('Invalid stack operation'); |
|
907
|
6 |
|
} |
|
908
|
6 |
|
|
|
909
|
6 |
|
$buffer = $mainStack[-1]; |
|
910
|
6 |
|
if ($opCode === Opcodes::OP_RIPEMD160) { |
|
911
|
6 |
|
$hash = Hash::ripemd160($buffer); |
|
912
|
|
|
} elseif ($opCode === Opcodes::OP_SHA1) { |
|
913
|
|
|
$hash = Hash::sha1($buffer); |
|
914
|
72 |
|
} elseif ($opCode === Opcodes::OP_SHA256) { |
|
915
|
72 |
|
$hash = Hash::sha256($buffer); |
|
916
|
72 |
|
} elseif ($opCode === Opcodes::OP_HASH160) { |
|
917
|
72 |
|
$hash = Hash::sha256ripe160($buffer); |
|
918
|
72 |
|
} else { |
|
919
|
48 |
|
$hash = Hash::sha256d($buffer); |
|
920
|
6 |
|
} |
|
921
|
|
|
|
|
922
|
|
|
$mainStack->pop(); |
|
923
|
42 |
|
$mainStack->push($hash); |
|
924
|
42 |
|
break; |
|
925
|
6 |
|
|
|
926
|
42 |
|
case Opcodes::OP_CODESEPARATOR: |
|
927
|
6 |
|
$this->hashStartPos = $parser->getPosition(); |
|
928
|
36 |
|
break; |
|
929
|
6 |
|
|
|
930
|
30 |
|
case Opcodes::OP_CHECKSIG: |
|
931
|
18 |
|
case Opcodes::OP_CHECKSIGVERIFY: |
|
932
|
18 |
|
if (count($mainStack) < 2) { |
|
933
|
6 |
|
throw new \RuntimeException('Invalid stack operation'); |
|
934
|
|
|
} |
|
935
|
|
|
|
|
936
|
42 |
|
$vchPubKey = $mainStack[-1]; |
|
937
|
42 |
|
$vchSig = $mainStack[-2]; |
|
938
|
42 |
|
|
|
939
|
|
|
$scriptCode = new Script($script->getBuffer()->slice($this->hashStartPos)); |
|
940
|
30 |
|
$success = $checker->checkSig($scriptCode, $vchSig, $vchPubKey, $sigVersion, $flags); |
|
941
|
|
|
|
|
942
|
|
|
$mainStack->pop(); |
|
943
|
|
|
$mainStack->pop(); |
|
944
|
30 |
|
$mainStack->push($success ? $this->vchTrue : $this->vchFalse); |
|
945
|
30 |
|
|
|
946
|
24 |
|
if ($opCode === Opcodes::OP_CHECKSIGVERIFY) { |
|
947
|
6 |
|
if ($success) { |
|
948
|
|
|
$mainStack->pop(); |
|
949
|
|
|
} else { |
|
950
|
18 |
|
throw new \RuntimeException('Checksig verify'); |
|
951
|
18 |
|
} |
|
952
|
|
|
} |
|
953
|
18 |
|
break; |
|
954
|
18 |
|
|
|
955
|
|
|
case Opcodes::OP_CHECKMULTISIG: |
|
956
|
12 |
|
case Opcodes::OP_CHECKMULTISIGVERIFY: |
|
957
|
12 |
|
$i = 1; |
|
958
|
12 |
|
if (count($mainStack) < $i) { |
|
959
|
|
|
throw new \RuntimeException('Invalid stack operation'); |
|
960
|
12 |
|
} |
|
961
|
|
|
|
|
962
|
|
|
$keyCount = Number::buffer($mainStack[-$i], $flags & self::VERIFY_MINIMALDATA)->getInt(); |
|
|
|
|
|
|
963
|
|
|
if ($math->cmp($keyCount, 0) < 0 || $math->cmp($keyCount, 20) > 0) { |
|
964
|
|
|
throw new \RuntimeException('OP_CHECKMULTISIG: Public key count exceeds 20'); |
|
965
|
|
|
} |
|
966
|
|
|
$this->opCount += $keyCount; |
|
967
|
12 |
|
$this->checkOpcodeCount(); |
|
968
|
|
|
|
|
969
|
6 |
|
// Extract positions of the keys, and signatures, from the stack. |
|
970
|
6 |
|
$ikey = ++$i; |
|
971
|
|
|
$i += $keyCount; /** @var int $i */ |
|
972
|
|
|
if (count($mainStack) < $i) { |
|
973
|
|
|
throw new \RuntimeException('Invalid stack operation'); |
|
974
|
|
|
} |
|
975
|
|
|
|
|
976
|
|
|
$sigCount = Number::buffer($mainStack[-$i], $flags & self::VERIFY_MINIMALDATA)->getInt(); |
|
|
|
|
|
|
977
|
|
|
if ($math->cmp($sigCount, 0) < 0 || $math->cmp($sigCount, $keyCount) > 0) { |
|
978
|
|
|
throw new \RuntimeException('Invalid Signature count'); |
|
979
|
|
|
} |
|
980
|
|
|
$isig = ++$i; |
|
981
|
|
|
$i += $sigCount; |
|
982
|
|
|
|
|
983
|
|
|
// Extract the script since the last OP_CODESEPARATOR |
|
984
|
|
|
$scriptCode = new Script($script->getBuffer()->slice($this->hashStartPos)); |
|
985
|
|
|
|
|
986
|
|
|
$fSuccess = true; |
|
987
|
|
|
while ($fSuccess && $sigCount > 0) { |
|
988
|
|
|
// Fetch the signature and public key |
|
989
|
|
|
$sig = $mainStack[-$isig]; |
|
990
|
|
|
$pubkey = $mainStack[-$ikey]; |
|
991
|
|
|
|
|
992
|
|
|
// Erase the signature and public key. |
|
993
|
|
|
unset($mainStack[-$isig], $mainStack[-$ikey]); |
|
994
|
|
|
|
|
995
|
|
|
// Decrement $i, since we are consuming stack values. |
|
996
|
|
|
$i -= 2; |
|
997
|
|
|
|
|
998
|
|
|
if ($checker->checkSig($scriptCode, $sig, $pubkey, $sigVersion, $flags)) { |
|
999
|
|
|
$isig++; |
|
1000
|
|
|
$sigCount--; |
|
1001
|
|
|
} |
|
1002
|
|
|
|
|
1003
|
|
|
$ikey++; |
|
1004
|
|
|
$keyCount--; |
|
1005
|
|
|
|
|
1006
|
|
|
// If there are more signatures left than keys left, |
|
1007
|
|
|
// then too many signatures have failed. Exit early, |
|
1008
|
|
|
// without checking any further signatures. |
|
1009
|
|
|
if ($sigCount > $keyCount) { |
|
1010
|
|
|
$fSuccess = false; |
|
1011
|
|
|
} |
|
1012
|
|
|
} |
|
1013
|
|
|
|
|
1014
|
|
|
while ($i-- > 1) { |
|
1015
|
|
|
$mainStack->pop(); |
|
1016
|
|
|
} |
|
1017
|
|
|
|
|
1018
|
|
|
// A bug causes CHECKMULTISIG to consume one extra argument |
|
1019
|
|
|
// whose contents were not checked in any way. |
|
1020
|
|
|
// |
|
1021
|
|
|
// Unfortunately this is a potential source of mutability, |
|
1022
|
|
|
// so optionally verify it is exactly equal to zero prior |
|
1023
|
|
|
// to removing it from the stack. |
|
1024
|
|
|
if ($mainStack->isEmpty()) { |
|
1025
|
|
|
throw new \RuntimeException('Invalid stack operation'); |
|
1026
|
|
|
} |
|
1027
|
|
|
|
|
1028
|
|
|
if ($flags & self::VERIFY_NULL_DUMMY && $mainStack[-1]->getSize() !== 0) { |
|
1029
|
|
|
throw new ScriptRuntimeException(self::VERIFY_NULL_DUMMY, 'Extra P2SH stack value should be OP_0'); |
|
1030
|
|
|
} |
|
1031
|
|
|
|
|
1032
|
|
|
$mainStack->pop(); |
|
1033
|
|
|
$mainStack->push($fSuccess ? $this->vchTrue : $this->vchFalse); |
|
1034
|
|
|
|
|
1035
|
|
|
if ($opCode === Opcodes::OP_CHECKMULTISIGVERIFY) { |
|
1036
|
|
|
if ($fSuccess) { |
|
1037
|
|
|
$mainStack->pop(); |
|
1038
|
|
|
} else { |
|
1039
|
|
|
throw new \RuntimeException('OP_CHECKMULTISIG verify'); |
|
1040
|
|
|
} |
|
1041
|
|
|
} |
|
1042
|
|
|
break; |
|
1043
|
|
|
|
|
1044
|
|
|
default: |
|
1045
|
|
|
throw new \RuntimeException('Opcode not found'); |
|
1046
|
|
|
} |
|
1047
|
|
|
|
|
1048
|
|
|
if (count($mainStack) + count($altStack) > 1000) { |
|
1049
|
|
|
throw new \RuntimeException('Invalid stack size, exceeds 1000'); |
|
1050
|
|
|
} |
|
1051
|
|
|
} |
|
1052
|
|
|
} |
|
1053
|
|
|
|
|
1054
|
|
|
if (!$vfStack->end() === 0) { |
|
1055
|
|
|
throw new \RuntimeException('Unbalanced conditional at script end'); |
|
1056
|
|
|
} |
|
1057
|
|
|
|
|
1058
|
6 |
|
return true; |
|
1059
|
6 |
|
} catch (ScriptRuntimeException $e) { |
|
1060
|
6 |
|
// echo "\n Runtime: " . $e->getMessage() . "\n"; |
|
1061
|
|
|
// Failure due to script tags, can access flag: $e->getFailureFlag() |
|
1062
|
426 |
|
return false; |
|
1063
|
|
|
} catch (\Exception $e) { |
|
1064
|
|
|
// echo "\n General: " . $e->getMessage() . PHP_EOL . $e->getTraceAsString(); |
|
1065
|
426 |
|
return false; |
|
1066
|
684 |
|
} |
|
1067
|
|
|
} |
|
1068
|
|
|
} |
|
1069
|
|
|
|
Bit-Wasp /
bitcoin-php
Loading history...
This check looks from parameters that have been defined for a function or method, but which are not used in the method body.