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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\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\ScriptWitnessInterface; |
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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\TransactionInputInterface; |
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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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* @var \BitWasp\Bitcoin\Math\Math |
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*/ |
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private $math; |
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/** |
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* @var BufferInterface |
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*/ |
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private $vchFalse; |
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/** |
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* @var BufferInterface |
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*/ |
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private $vchTrue; |
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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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*/ |
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408 |
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public function __construct(EcAdapterInterface $ecAdapter) |
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{ |
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408 |
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$this->math = $ecAdapter->getMath(); |
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408 |
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$this->vchFalse = new Buffer("", 0, $this->math); |
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408 |
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$this->vchTrue = new Buffer("\x01", 1, $this->math); |
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408 |
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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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2646 |
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public function castToBool(BufferInterface $value) |
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{ |
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2646 |
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$character = $value->getBinary(); |
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2646 |
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$characters = array_values(unpack("C*", $value->getBinary())); |
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2646 |
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$size = count($characters); |
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for ($i = 0; $i < $size; $i++) { |
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2439 |
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$chr = ord($characters[$i]); |
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2439 |
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if ($chr !== 0) { |
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2439 |
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if ($i === ($size - 1) && $chr === 0x80) { |
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return false; |
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} |
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2439 |
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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 $signature) |
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{ |
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try { |
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TransactionSignature::isDERSignature($signature); |
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return true; |
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} catch (SignatureNotCanonical $e) { |
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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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/** |
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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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* @param int $count |
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* @return $this |
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*/ |
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private function checkOpcodeCount($count) |
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{ |
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if ($count > 201) { |
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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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/** |
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* @param WitnessProgram $witnessProgram |
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* @param ScriptWitnessInterface $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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*/ |
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private function verifyWitnessProgram(WitnessProgram $witnessProgram, ScriptWitnessInterface $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 = $witnessProgram->getProgram(); |
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if ($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($scriptPubKey->getBuffer()); |
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if (!$hashScriptPubKey->equals($buffer)) { |
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return false; |
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} |
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} elseif ($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 = $scriptWitness; |
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} else { |
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return false; |
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} |
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} elseif ($flags & self::VERIFY_DISCOURAGE_UPGRADABLE_WITNESS_PROGRAM) { |
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return false; |
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} else { |
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return false; |
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} |
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54 |
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$mainStack = new Stack(); |
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foreach ($stackValues as $value) { |
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$mainStack->push($value); |
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} |
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if (!$this->evaluate($scriptPubKey, $mainStack, 1, $flags, $checker)) { |
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return false; |
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} |
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54 |
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if ($mainStack->count() !== 1) { |
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return false; |
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} |
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if (!$this->castToBool($mainStack->bottom())) { |
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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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* @param ScriptInterface $scriptSig |
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* @param ScriptInterface $scriptPubKey |
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* @param int $flags |
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* @param Checker $checker |
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* @param ScriptWitnessInterface|null $witness |
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* @return bool |
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*/ |
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public function verify(ScriptInterface $scriptSig, ScriptInterface $scriptPubKey, $flags, Checker $checker, ScriptWitnessInterface $witness = null) |
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{ |
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3654 |
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static $emptyWitness = null; |
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if ($emptyWitness === null) { |
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3 |
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$emptyWitness = new ScriptWitness([]); |
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} |
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225
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$witness = is_null($witness) ? $emptyWitness : $witness; |
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227
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3654 |
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if (($flags & self::VERIFY_SIGPUSHONLY) != 0 && !$scriptSig->isPushOnly()) { |
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6 |
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return false; |
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} |
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231
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3648 |
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$stack = new Stack(); |
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232
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if (!$this->evaluate($scriptSig, $stack, 0, $flags, $checker)) { |
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return false; |
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} |
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$backup = []; |
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3480 |
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if ($flags & self::VERIFY_P2SH) { |
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2328 |
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foreach ($stack as $s) { |
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1884 |
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$backup[] = $s; |
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} |
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1552 |
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} |
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3480 |
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if (!$this->evaluate($scriptPubKey, $stack, 0, $flags, $checker)) { |
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return false; |
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} |
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247
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2340 |
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if ($stack->isEmpty()) { |
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36 |
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return false; |
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} |
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251
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2304 |
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if (false === $this->castToBool($stack[-1])) { |
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147 |
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return false; |
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} |
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255
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2157 |
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$program = null; |
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256
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2157 |
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if ($flags & self::VERIFY_WITNESS) { |
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257
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102 |
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if ($scriptPubKey->isWitness($program)) { |
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258
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/** @var WitnessProgram $program */ |
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259
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51 |
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if ($scriptSig->getBuffer()->getSize() !== 0) { |
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260
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3 |
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return false; |
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261
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} |
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262
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263
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48 |
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if (!$this->verifyWitnessProgram($program, $witness, $flags, $checker)) { |
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264
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33 |
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return false; |
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265
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} |
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266
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267
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15 |
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$stack->resize(1); |
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268
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10 |
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} |
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269
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44 |
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} |
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270
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271
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2121 |
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if ($flags & self::VERIFY_P2SH && (new OutputClassifier())->isPayToScriptHash($scriptPubKey)) { |
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272
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93 |
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if (!$scriptSig->isPushOnly()) { |
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273
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12 |
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return false; |
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274
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} |
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275
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276
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81 |
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$stack = new Stack(); |
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277
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81 |
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foreach ($backup as $i) { |
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278
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81 |
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$stack->push($i); |
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279
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54 |
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} |
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280
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281
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// Restore mainStack to how it was after evaluating scriptSig |
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282
|
81 |
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if ($stack->isEmpty()) { |
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283
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return false; |
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284
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} |
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285
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286
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// Load redeemscript as the scriptPubKey |
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287
|
81 |
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$scriptPubKey = new Script($stack->bottom()); |
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288
|
81 |
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$stack->pop(); |
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289
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290
|
81 |
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if (!$this->evaluate($scriptPubKey, $stack, 0, $flags, $checker)) { |
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291
|
15 |
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return false; |
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292
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} |
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293
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294
|
66 |
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if ($stack->isEmpty()) { |
|
295
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return false; |
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296
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} |
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297
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298
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66 |
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if (!$this->castToBool($stack->bottom())) { |
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299
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3 |
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return false; |
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300
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} |
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301
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302
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63 |
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if ($flags & self::VERIFY_WITNESS) { |
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303
|
33 |
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if ($scriptPubKey->isWitness($program)) { |
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304
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/** @var WitnessProgram $program */ |
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305
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27 |
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if ($scriptSig != (ScriptFactory::create()->push($scriptPubKey->getBuffer())->getScript())) { |
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306
|
3 |
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return false; // SCRIPT_ERR_WITNESS_MALLEATED_P2SH |
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307
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} |
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308
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309
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24 |
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if (!$this->verifyWitnessProgram($program, $witness, $flags, $checker)) { |
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310
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12 |
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return false; |
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311
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} |
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312
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313
|
12 |
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$stack->resize(1); |
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314
|
8 |
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} |
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315
|
12 |
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} |
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316
|
32 |
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} |
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317
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318
|
2076 |
|
if ($flags & self::VERIFY_CLEAN_STACK) { |
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319
|
18 |
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if (!($flags & self::VERIFY_P2SH != 0 && $flags & self::VERIFY_WITNESS != 0)) { |
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320
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return false; // implied flags required |
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321
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} |
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322
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|
|
|
|
323
|
18 |
|
if (count($stack) != 1) { |
|
324
|
6 |
|
return false; // Cleanstack |
|
325
|
|
|
} |
|
326
|
8 |
|
} |
|
327
|
|
|
|
|
328
|
2070 |
|
if ($flags & self::VERIFY_WITNESS) { |
|
329
|
51 |
|
if (!$flags & self::VERIFY_P2SH) { |
|
330
|
|
|
return false; // |
|
331
|
|
|
} |
|
332
|
|
|
|
|
333
|
51 |
|
if ($program === null && !$witness->isNull()) { |
|
334
|
3 |
|
return false; // SCRIPT_ERR_WITNESS_UNEXPECTED |
|
335
|
|
|
} |
|
336
|
32 |
|
} |
|
337
|
|
|
|
|
338
|
2067 |
|
return true; |
|
339
|
|
|
} |
|
340
|
|
|
|
|
341
|
|
|
/** |
|
342
|
|
|
* @param Stack $vfStack |
|
343
|
|
|
* @return bool |
|
344
|
|
|
*/ |
|
345
|
3636 |
|
private function checkExec(Stack $vfStack) |
|
346
|
|
|
{ |
|
347
|
3636 |
|
$ret = 0; |
|
348
|
3636 |
|
foreach ($vfStack as $item) { |
|
349
|
726 |
|
if ($item === false) { |
|
350
|
556 |
|
$ret++; |
|
351
|
314 |
|
} |
|
352
|
2424 |
|
} |
|
353
|
|
|
|
|
354
|
3636 |
|
return $ret; |
|
355
|
|
|
} |
|
356
|
|
|
|
|
357
|
|
|
/** |
|
358
|
|
|
* @param ScriptInterface $script |
|
359
|
|
|
* @param Stack $mainStack |
|
360
|
|
|
* @param int $sigVersion |
|
361
|
|
|
* @param int $flags |
|
362
|
|
|
* @param Checker $checker |
|
363
|
|
|
* @return bool |
|
364
|
|
|
*/ |
|
365
|
3651 |
|
public function evaluate(ScriptInterface $script, Stack $mainStack, $sigVersion, $flags, Checker $checker) |
|
366
|
|
|
{ |
|
367
|
3651 |
|
$hashStartPos = 0; |
|
368
|
3651 |
|
$opCount = 0; |
|
369
|
3651 |
|
$altStack = new Stack(); |
|
370
|
3651 |
|
$vfStack = new Stack(); |
|
371
|
3651 |
|
$minimal = ($flags & self::VERIFY_MINIMALDATA) > 0; |
|
372
|
3651 |
|
$parser = $script->getScriptParser(); |
|
373
|
|
|
|
|
374
|
3651 |
|
if ($script->getBuffer()->getSize() > 10000) { |
|
375
|
3 |
|
return false; |
|
376
|
|
|
} |
|
377
|
|
|
|
|
378
|
|
|
try { |
|
379
|
3651 |
|
foreach ($parser as $operation) { |
|
380
|
3636 |
|
$opCode = $operation->getOp(); |
|
381
|
3636 |
|
$pushData = $operation->getData(); |
|
382
|
3636 |
|
$fExec = !$this->checkExec($vfStack); |
|
383
|
|
|
|
|
384
|
|
|
// If pushdata was written to |
|
385
|
3636 |
|
if ($operation->isPush() && $operation->getDataSize() > InterpreterInterface::MAX_SCRIPT_ELEMENT_SIZE) { |
|
386
|
9 |
|
throw new \RuntimeException('Error - push size'); |
|
387
|
|
|
} |
|
388
|
|
|
|
|
389
|
|
|
// OP_RESERVED should not count towards opCount |
|
390
|
3633 |
|
if ($opCode > Opcodes::OP_16 && ++$opCount) { |
|
391
|
3447 |
|
$this->checkOpcodeCount($opCount); |
|
392
|
2298 |
|
} |
|
393
|
|
|
|
|
394
|
3633 |
|
if (in_array($opCode, $this->disabledOps, true)) { |
|
395
|
78 |
|
throw new \RuntimeException('Disabled Opcode'); |
|
396
|
|
|
} |
|
397
|
|
|
|
|
398
|
3633 |
|
if ($fExec && $operation->isPush()) { |
|
399
|
2604 |
|
var_dump($minimal); |
|
|
|
|
|
|
400
|
|
|
// In range of a pushdata opcode |
|
401
|
2604 |
|
if ($minimal && !$this->checkMinimalPush($opCode, $pushData)) { |
|
402
|
66 |
|
throw new ScriptRuntimeException(self::VERIFY_MINIMALDATA, 'Minimal pushdata required'); |
|
403
|
|
|
} |
|
404
|
|
|
|
|
405
|
2538 |
|
$mainStack->push($pushData); |
|
406
|
2538 |
|
echo " - [pushed '" . $pushData->getHex() . "']\n"; |
|
407
|
3549 |
|
} elseif ($fExec || (Opcodes::OP_IF <= $opCode && $opCode <= Opcodes::OP_ENDIF)) { |
|
408
|
3513 |
|
echo "OPCODE - " . $script->getOpcodes()->getOp($opCode) . "\n"; |
|
409
|
|
|
switch ($opCode) { |
|
410
|
3513 |
|
case Opcodes::OP_1NEGATE: |
|
411
|
3513 |
|
case Opcodes::OP_1: |
|
412
|
3490 |
|
case Opcodes::OP_2: |
|
413
|
3486 |
|
case Opcodes::OP_3: |
|
414
|
3486 |
|
case Opcodes::OP_4: |
|
415
|
3486 |
|
case Opcodes::OP_5: |
|
416
|
3486 |
|
case Opcodes::OP_6: |
|
417
|
3486 |
|
case Opcodes::OP_7: |
|
418
|
3485 |
|
case Opcodes::OP_8: |
|
419
|
3485 |
|
case Opcodes::OP_9: |
|
420
|
3485 |
|
case Opcodes::OP_10: |
|
421
|
3485 |
|
case Opcodes::OP_11: |
|
422
|
3484 |
|
case Opcodes::OP_12: |
|
423
|
3484 |
|
case Opcodes::OP_13: |
|
424
|
3484 |
|
case Opcodes::OP_14: |
|
425
|
3484 |
|
case Opcodes::OP_15: |
|
426
|
3484 |
|
case Opcodes::OP_16: |
|
427
|
2088 |
|
$num = Number::int((int) $opCode - (Opcodes::OP_1 - 1))->getBuffer(); |
|
428
|
2088 |
|
$mainStack->push($num); |
|
429
|
2088 |
|
break; |
|
430
|
|
|
|
|
431
|
3426 |
|
case Opcodes::OP_CHECKLOCKTIMEVERIFY: |
|
432
|
18 |
|
if (!($flags & self::VERIFY_CHECKLOCKTIMEVERIFY)) { |
|
433
|
18 |
|
if ($flags & self::VERIFY_DISCOURAGE_UPGRADABLE_NOPS) { |
|
434
|
3 |
|
throw new ScriptRuntimeException(self::VERIFY_DISCOURAGE_UPGRADABLE_NOPS, 'Upgradable NOP found - this is discouraged'); |
|
435
|
|
|
} |
|
436
|
15 |
|
break; |
|
437
|
|
|
} |
|
438
|
|
|
|
|
439
|
|
|
if ($mainStack->isEmpty()) { |
|
440
|
|
|
throw new \RuntimeException('Invalid stack operation - CLTV'); |
|
441
|
|
|
} |
|
442
|
|
|
|
|
443
|
|
|
$lockTime = Number::buffer($mainStack[-1], $minimal, 5, $this->math); |
|
444
|
|
|
if (!$checker->checkLockTime($lockTime)) { |
|
445
|
|
|
throw new ScriptRuntimeException(self::VERIFY_CHECKLOCKTIMEVERIFY, 'Unsatisfied locktime'); |
|
446
|
|
|
} |
|
447
|
|
|
|
|
448
|
|
|
break; |
|
449
|
|
|
|
|
450
|
3423 |
|
case Opcodes::OP_CHECKSEQUENCEVERIFY: |
|
451
|
36 |
|
if (!($flags & self::VERIFY_CHECKSEQUENCEVERIFY)) { |
|
452
|
18 |
|
if ($flags & self::VERIFY_DISCOURAGE_UPGRADABLE_NOPS) { |
|
453
|
3 |
|
throw new ScriptRuntimeException(self::VERIFY_DISCOURAGE_UPGRADABLE_NOPS, 'Upgradable NOP found - this is discouraged'); |
|
454
|
|
|
} |
|
455
|
15 |
|
break; |
|
456
|
|
|
} |
|
457
|
|
|
|
|
458
|
18 |
|
if ($mainStack->isEmpty()) { |
|
459
|
3 |
|
throw new \RuntimeException('Invalid stack operation - CSV'); |
|
460
|
|
|
} |
|
461
|
|
|
|
|
462
|
15 |
|
$sequence = Number::buffer($mainStack[-1], $minimal, 5, $this->math); |
|
463
|
12 |
|
$nSequence = $sequence->getGmp(); |
|
464
|
12 |
|
if ($this->math->cmp($nSequence, gmp_init(0)) < 0) { |
|
465
|
3 |
|
throw new ScriptRuntimeException(self::VERIFY_CHECKSEQUENCEVERIFY, 'Negative locktime'); |
|
466
|
|
|
} |
|
467
|
|
|
|
|
468
|
9 |
|
if (($nSequence & TransactionInputInterface::SEQUENCE_LOCKTIME_DISABLE_FLAG) != 0) { |
|
469
|
3 |
|
break; |
|
470
|
|
|
} |
|
471
|
|
|
|
|
472
|
6 |
|
if (!$checker->checkSequence($sequence)) { |
|
473
|
6 |
|
throw new ScriptRuntimeException(self::VERIFY_CHECKSEQUENCEVERIFY, 'Unsatisfied sequence locks'); |
|
474
|
|
|
} |
|
475
|
|
|
break; |
|
476
|
|
|
|
|
477
|
3402 |
|
case Opcodes::OP_NOP1: |
|
478
|
3400 |
|
case Opcodes::OP_NOP4: |
|
479
|
3399 |
|
case Opcodes::OP_NOP5: |
|
480
|
3398 |
|
case Opcodes::OP_NOP6: |
|
481
|
3397 |
|
case Opcodes::OP_NOP7: |
|
482
|
3396 |
|
case Opcodes::OP_NOP8: |
|
483
|
3395 |
|
case Opcodes::OP_NOP9: |
|
484
|
3394 |
|
case Opcodes::OP_NOP10: |
|
485
|
84 |
|
if ($flags & self::VERIFY_DISCOURAGE_UPGRADABLE_NOPS) { |
|
486
|
33 |
|
throw new ScriptRuntimeException(self::VERIFY_DISCOURAGE_UPGRADABLE_NOPS, 'Upgradable NOP found - this is discouraged'); |
|
487
|
|
|
} |
|
488
|
51 |
|
break; |
|
489
|
|
|
|
|
490
|
3369 |
|
case Opcodes::OP_NOP: |
|
491
|
258 |
|
break; |
|
492
|
|
|
|
|
493
|
3294 |
|
case Opcodes::OP_IF: |
|
494
|
3204 |
|
case Opcodes::OP_NOTIF: |
|
495
|
|
|
// <expression> if [statements] [else [statements]] endif |
|
496
|
|
|
|
|
497
|
744 |
|
$value = false; |
|
498
|
744 |
|
if ($fExec) { |
|
499
|
744 |
|
if ($mainStack->isEmpty()) { |
|
500
|
9 |
|
throw new \RuntimeException('Unbalanced conditional: IF/NOTIF'); |
|
501
|
|
|
} |
|
502
|
|
|
|
|
503
|
735 |
|
$value = $this->castToBool($mainStack->pop()); |
|
504
|
735 |
|
if ($opCode === Opcodes::OP_NOTIF) { |
|
505
|
51 |
|
$value = !$value; |
|
506
|
34 |
|
} |
|
507
|
490 |
|
} |
|
508
|
|
|
|
|
509
|
735 |
|
$vfStack->push($value); |
|
510
|
735 |
|
break; |
|
511
|
|
|
|
|
512
|
|
|
|
|
513
|
3018 |
|
case Opcodes::OP_ELSE: |
|
514
|
348 |
|
if ($vfStack->isEmpty()) { |
|
515
|
15 |
|
throw new \RuntimeException('Unbalanced conditional: ELSE'); |
|
516
|
|
|
} |
|
517
|
|
|
|
|
518
|
339 |
|
$vfStack->push(!$vfStack->pop()); |
|
519
|
339 |
|
break; |
|
520
|
|
|
|
|
521
|
3006 |
|
case Opcodes::OP_ENDIF: |
|
522
|
444 |
|
if ($vfStack->isEmpty()) { |
|
523
|
24 |
|
throw new \RuntimeException('Unbalanced conditional: ENDIF'); |
|
524
|
|
|
} |
|
525
|
429 |
|
$vfStack->pop(); |
|
526
|
429 |
|
break; |
|
527
|
|
|
|
|
528
|
2595 |
|
case Opcodes::OP_VERIFY: |
|
529
|
102 |
|
if ($mainStack->isEmpty()) { |
|
530
|
6 |
|
throw new \RuntimeException('Invalid stack operation'); |
|
531
|
|
|
} |
|
532
|
96 |
|
$value = $this->castToBool($mainStack[-1]); |
|
533
|
96 |
|
if (!$value) { |
|
534
|
3 |
|
throw new \RuntimeException('Error: verify'); |
|
535
|
|
|
} |
|
536
|
93 |
|
$mainStack->pop(); |
|
537
|
93 |
|
break; |
|
538
|
|
|
|
|
539
|
2562 |
|
case Opcodes::OP_TOALTSTACK: |
|
540
|
33 |
|
if ($mainStack->isEmpty()) { |
|
541
|
6 |
|
throw new \RuntimeException('Invalid stack operation OP_TOALTSTACK'); |
|
542
|
|
|
} |
|
543
|
27 |
|
$altStack->push($mainStack->pop()); |
|
544
|
27 |
|
break; |
|
545
|
|
|
|
|
546
|
2553 |
|
case Opcodes::OP_FROMALTSTACK: |
|
547
|
21 |
|
if ($altStack->isEmpty()) { |
|
548
|
9 |
|
throw new \RuntimeException('Invalid alt-stack operation OP_FROMALTSTACK'); |
|
549
|
|
|
} |
|
550
|
12 |
|
$mainStack->push($altStack->pop()); |
|
551
|
12 |
|
break; |
|
552
|
|
|
|
|
553
|
2541 |
|
case Opcodes::OP_IFDUP: |
|
554
|
|
|
// If top value not zero, duplicate it. |
|
555
|
24 |
|
if ($mainStack->isEmpty()) { |
|
556
|
9 |
|
throw new \RuntimeException('Invalid stack operation OP_IFDUP'); |
|
557
|
|
|
} |
|
558
|
15 |
|
$vch = $mainStack[-1]; |
|
559
|
15 |
|
if ($this->castToBool($vch)) { |
|
560
|
12 |
|
$mainStack->push($vch); |
|
561
|
8 |
|
} |
|
562
|
15 |
|
break; |
|
563
|
|
|
|
|
564
|
2529 |
|
case Opcodes::OP_DEPTH: |
|
565
|
270 |
|
$num = count($mainStack); |
|
566
|
270 |
|
$depth = Number::int($num)->getBuffer(); |
|
567
|
270 |
|
$mainStack->push($depth); |
|
568
|
270 |
|
break; |
|
569
|
|
|
|
|
570
|
2499 |
|
case Opcodes::OP_DROP: |
|
571
|
147 |
|
if ($mainStack->isEmpty()) { |
|
572
|
9 |
|
throw new \RuntimeException('Invalid stack operation OP_DROP'); |
|
573
|
|
|
} |
|
574
|
138 |
|
$mainStack->pop(); |
|
575
|
138 |
|
break; |
|
576
|
|
|
|
|
577
|
2487 |
|
case Opcodes::OP_DUP: |
|
578
|
105 |
|
if ($mainStack->isEmpty()) { |
|
579
|
9 |
|
throw new \RuntimeException('Invalid stack operation OP_DUP'); |
|
580
|
|
|
} |
|
581
|
96 |
|
$vch = $mainStack[-1]; |
|
582
|
96 |
|
$mainStack->push($vch); |
|
583
|
96 |
|
break; |
|
584
|
|
|
|
|
585
|
2457 |
|
case Opcodes::OP_NIP: |
|
586
|
27 |
|
if (count($mainStack) < 2) { |
|
587
|
12 |
|
throw new \RuntimeException('Invalid stack operation OP_NIP'); |
|
588
|
|
|
} |
|
589
|
15 |
|
unset($mainStack[-2]); |
|
590
|
15 |
|
break; |
|
591
|
|
|
|
|
592
|
2436 |
|
case Opcodes::OP_OVER: |
|
593
|
27 |
|
if (count($mainStack) < 2) { |
|
594
|
12 |
|
throw new \RuntimeException('Invalid stack operation OP_OVER'); |
|
595
|
|
|
} |
|
596
|
15 |
|
$vch = $mainStack[-2]; |
|
597
|
15 |
|
$mainStack->push($vch); |
|
598
|
15 |
|
break; |
|
599
|
|
|
|
|
600
|
2421 |
|
case Opcodes::OP_ROT: |
|
601
|
42 |
|
if (count($mainStack) < 3) { |
|
602
|
15 |
|
throw new \RuntimeException('Invalid stack operation OP_ROT'); |
|
603
|
|
|
} |
|
604
|
27 |
|
$mainStack->swap(-3, -2); |
|
605
|
27 |
|
$mainStack->swap(-2, -1); |
|
606
|
27 |
|
break; |
|
607
|
|
|
|
|
608
|
2400 |
|
case Opcodes::OP_SWAP: |
|
609
|
36 |
|
if (count($mainStack) < 2) { |
|
610
|
12 |
|
throw new \RuntimeException('Invalid stack operation OP_SWAP'); |
|
611
|
|
|
} |
|
612
|
24 |
|
$mainStack->swap(-2, -1); |
|
613
|
24 |
|
break; |
|
614
|
|
|
|
|
615
|
2385 |
|
case Opcodes::OP_TUCK: |
|
616
|
24 |
|
if (count($mainStack) < 2) { |
|
617
|
12 |
|
throw new \RuntimeException('Invalid stack operation OP_TUCK'); |
|
618
|
|
|
} |
|
619
|
12 |
|
$vch = $mainStack[-1]; |
|
620
|
12 |
|
$mainStack->add(count($mainStack) - 2, $vch); |
|
621
|
12 |
|
break; |
|
622
|
|
|
|
|
623
|
2370 |
|
case Opcodes::OP_PICK: |
|
624
|
2359 |
|
case Opcodes::OP_ROLL: |
|
625
|
99 |
|
if (count($mainStack) < 2) { |
|
626
|
15 |
|
throw new \RuntimeException('Invalid stack operation OP_PICK'); |
|
627
|
|
|
} |
|
628
|
|
|
|
|
629
|
84 |
|
$n = Number::buffer($mainStack[-1], $minimal, 4)->getGmp(); |
|
630
|
78 |
|
$mainStack->pop(); |
|
631
|
78 |
|
if ($this->math->cmp($n, gmp_init(0)) < 0 || $this->math->cmp($n, gmp_init(count($mainStack))) >= 0) { |
|
632
|
18 |
|
throw new \RuntimeException('Invalid stack operation OP_PICK'); |
|
633
|
|
|
} |
|
634
|
|
|
|
|
635
|
60 |
|
$pos = (int) gmp_strval($this->math->sub($this->math->sub(gmp_init(0), $n), gmp_init(1)), 10); |
|
636
|
60 |
|
$vch = $mainStack[$pos]; |
|
637
|
60 |
|
if ($opCode === Opcodes::OP_ROLL) { |
|
638
|
30 |
|
unset($mainStack[$pos]); |
|
639
|
20 |
|
} |
|
640
|
60 |
|
$mainStack->push($vch); |
|
641
|
60 |
|
break; |
|
642
|
|
|
|
|
643
|
2313 |
|
case Opcodes::OP_2DROP: |
|
644
|
33 |
|
if (count($mainStack) < 2) { |
|
645
|
6 |
|
throw new \RuntimeException('Invalid stack operation OP_2DROP'); |
|
646
|
|
|
} |
|
647
|
27 |
|
$mainStack->pop(); |
|
648
|
27 |
|
$mainStack->pop(); |
|
649
|
27 |
|
break; |
|
650
|
|
|
|
|
651
|
2304 |
|
case Opcodes::OP_2DUP: |
|
652
|
27 |
|
if (count($mainStack) < 2) { |
|
653
|
12 |
|
throw new \RuntimeException('Invalid stack operation OP_2DUP'); |
|
654
|
|
|
} |
|
655
|
15 |
|
$string1 = $mainStack[-2]; |
|
656
|
15 |
|
$string2 = $mainStack[-1]; |
|
657
|
15 |
|
$mainStack->push($string1); |
|
658
|
15 |
|
$mainStack->push($string2); |
|
659
|
15 |
|
break; |
|
660
|
|
|
|
|
661
|
2289 |
|
case Opcodes::OP_3DUP: |
|
662
|
42 |
|
if (count($mainStack) < 3) { |
|
663
|
15 |
|
throw new \RuntimeException('Invalid stack operation OP_3DUP'); |
|
664
|
|
|
} |
|
665
|
27 |
|
$string1 = $mainStack[-3]; |
|
666
|
27 |
|
$string2 = $mainStack[-2]; |
|
667
|
27 |
|
$string3 = $mainStack[-1]; |
|
668
|
27 |
|
$mainStack->push($string1); |
|
669
|
27 |
|
$mainStack->push($string2); |
|
670
|
27 |
|
$mainStack->push($string3); |
|
671
|
27 |
|
break; |
|
672
|
|
|
|
|
673
|
2256 |
|
case Opcodes::OP_2OVER: |
|
674
|
24 |
|
if (count($mainStack) < 4) { |
|
675
|
12 |
|
throw new \RuntimeException('Invalid stack operation OP_2OVER'); |
|
676
|
|
|
} |
|
677
|
12 |
|
$string1 = $mainStack[-4]; |
|
678
|
12 |
|
$string2 = $mainStack[-3]; |
|
679
|
12 |
|
$mainStack->push($string1); |
|
680
|
12 |
|
$mainStack->push($string2); |
|
681
|
12 |
|
break; |
|
682
|
|
|
|
|
683
|
2241 |
|
case Opcodes::OP_2ROT: |
|
684
|
36 |
|
if (count($mainStack) < 6) { |
|
685
|
6 |
|
throw new \RuntimeException('Invalid stack operation OP_2ROT'); |
|
686
|
|
|
} |
|
687
|
30 |
|
$string1 = $mainStack[-6]; |
|
688
|
30 |
|
$string2 = $mainStack[-5]; |
|
689
|
30 |
|
unset($mainStack[-6], $mainStack[-5]); |
|
690
|
30 |
|
$mainStack->push($string1); |
|
691
|
30 |
|
$mainStack->push($string2); |
|
692
|
30 |
|
break; |
|
693
|
|
|
|
|
694
|
2232 |
|
case Opcodes::OP_2SWAP: |
|
695
|
21 |
|
if (count($mainStack) < 4) { |
|
696
|
12 |
|
throw new \RuntimeException('Invalid stack operation OP_2SWAP'); |
|
697
|
|
|
} |
|
698
|
9 |
|
$mainStack->swap(-3, -1); |
|
699
|
9 |
|
$mainStack->swap(-4, -2); |
|
700
|
9 |
|
break; |
|
701
|
|
|
|
|
702
|
2217 |
|
case Opcodes::OP_SIZE: |
|
703
|
99 |
|
if ($mainStack->isEmpty()) { |
|
704
|
9 |
|
throw new \RuntimeException('Invalid stack operation OP_SIZE'); |
|
705
|
|
|
} |
|
706
|
90 |
|
$size = Number::int($mainStack[-1]->getSize()); |
|
707
|
90 |
|
$mainStack->push($size->getBuffer()); |
|
708
|
90 |
|
break; |
|
709
|
|
|
|
|
710
|
2205 |
|
case Opcodes::OP_EQUAL: |
|
711
|
2080 |
|
case Opcodes::OP_EQUALVERIFY: |
|
712
|
1059 |
|
if (count($mainStack) < 2) { |
|
713
|
15 |
|
throw new \RuntimeException('Invalid stack operation OP_EQUAL'); |
|
714
|
|
|
} |
|
715
|
|
|
|
|
716
|
1044 |
|
$equal = $mainStack[-2]->equals($mainStack[-1]); |
|
717
|
1044 |
|
$mainStack->pop(); |
|
718
|
1044 |
|
$mainStack->pop(); |
|
719
|
1044 |
|
$mainStack->push($equal ? $this->vchTrue : $this->vchFalse); |
|
720
|
1044 |
|
if ($opCode === Opcodes::OP_EQUALVERIFY) { |
|
721
|
207 |
|
if ($equal) { |
|
722
|
174 |
|
$mainStack->pop(); |
|
723
|
116 |
|
} else { |
|
724
|
36 |
|
throw new \RuntimeException('Error EQUALVERIFY'); |
|
725
|
|
|
} |
|
726
|
116 |
|
} |
|
727
|
|
|
|
|
728
|
1014 |
|
break; |
|
729
|
|
|
|
|
730
|
|
|
// Arithmetic operations |
|
731
|
1683 |
|
case $opCode >= Opcodes::OP_1ADD && $opCode <= Opcodes::OP_0NOTEQUAL: |
|
732
|
336 |
|
if ($mainStack->isEmpty()) { |
|
733
|
21 |
|
throw new \Exception('Invalid stack operation 1ADD-OP_0NOTEQUAL'); |
|
734
|
|
|
} |
|
735
|
|
|
|
|
736
|
315 |
|
$num = Number::buffer($mainStack[-1], $minimal)->getGmp(); |
|
737
|
|
|
|
|
738
|
246 |
|
if ($opCode === Opcodes::OP_1ADD) { |
|
739
|
24 |
|
$num = $this->math->add($num, gmp_init(1)); |
|
740
|
238 |
|
} elseif ($opCode === Opcodes::OP_1SUB) { |
|
741
|
12 |
|
$num = $this->math->sub($num, gmp_init(1)); |
|
742
|
218 |
|
} elseif ($opCode === Opcodes::OP_2MUL) { |
|
743
|
|
|
$num = $this->math->mul(gmp_init(2), $num); |
|
744
|
210 |
|
} elseif ($opCode === Opcodes::OP_NEGATE) { |
|
745
|
12 |
|
$num = $this->math->sub(gmp_init(0), $num); |
|
746
|
207 |
|
} elseif ($opCode === Opcodes::OP_ABS) { |
|
747
|
15 |
|
if ($this->math->cmp($num, gmp_init(0)) < 0) { |
|
748
|
9 |
|
$num = $this->math->sub(gmp_init(0), $num); |
|
749
|
4 |
|
} |
|
750
|
196 |
|
} elseif ($opCode === Opcodes::OP_NOT) { |
|
751
|
162 |
|
$num = gmp_init($this->math->cmp($num, gmp_init(0)) == 0 ? 1 : 0); |
|
752
|
108 |
|
} else { |
|
753
|
|
|
// is OP_0NOTEQUAL |
|
754
|
24 |
|
$num = gmp_init($this->math->cmp($num, gmp_init(0)) !== 0 ? 1 : 0); |
|
755
|
|
|
} |
|
756
|
|
|
|
|
757
|
246 |
|
$mainStack->pop(); |
|
758
|
|
|
|
|
759
|
246 |
|
$buffer = Number::int(gmp_strval($num, 10))->getBuffer(); |
|
760
|
|
|
|
|
761
|
246 |
|
$mainStack->push($buffer); |
|
762
|
246 |
|
break; |
|
763
|
|
|
|
|
764
|
1482 |
|
case $opCode >= Opcodes::OP_ADD && $opCode <= Opcodes::OP_MAX: |
|
765
|
567 |
|
if (count($mainStack) < 2) { |
|
766
|
51 |
|
throw new \Exception('Invalid stack operation (OP_ADD - OP_MAX)'); |
|
767
|
|
|
} |
|
768
|
|
|
|
|
769
|
516 |
|
$num1 = Number::buffer($mainStack[-2], $minimal)->getGmp(); |
|
770
|
465 |
|
$num2 = Number::buffer($mainStack[-1], $minimal)->getGmp(); |
|
771
|
|
|
|
|
772
|
426 |
|
if ($opCode === Opcodes::OP_ADD) { |
|
773
|
93 |
|
$num = $this->math->add($num1, $num2); |
|
774
|
401 |
|
} else if ($opCode === Opcodes::OP_SUB) { |
|
775
|
21 |
|
$num = $this->math->sub($num1, $num2); |
|
776
|
344 |
|
} else if ($opCode === Opcodes::OP_BOOLAND) { |
|
777
|
30 |
|
$num = $this->math->cmp($num1, gmp_init(0)) !== 0 && $this->math->cmp($num2, gmp_init(0)) !== 0; |
|
778
|
320 |
|
} else if ($opCode === Opcodes::OP_BOOLOR) { |
|
779
|
33 |
|
$num = $this->math->cmp($num1, gmp_init(0)) !== 0 || $this->math->cmp($num2, gmp_init(0)) !== 0; |
|
780
|
289 |
|
} elseif ($opCode === Opcodes::OP_NUMEQUAL) { |
|
781
|
93 |
|
$num = $this->math->cmp($num1, $num2) === 0; |
|
782
|
244 |
|
} elseif ($opCode === Opcodes::OP_NUMEQUALVERIFY) { |
|
783
|
12 |
|
$num = $this->math->cmp($num1, $num2) === 0; |
|
784
|
194 |
|
} elseif ($opCode === Opcodes::OP_NUMNOTEQUAL) { |
|
785
|
18 |
|
$num = $this->math->cmp($num1, $num2) !== 0; |
|
786
|
180 |
|
} elseif ($opCode === Opcodes::OP_LESSTHAN) { |
|
787
|
30 |
|
$num = $this->math->cmp($num1, $num2) < 0; |
|
788
|
158 |
|
} elseif ($opCode === Opcodes::OP_GREATERTHAN) { |
|
789
|
30 |
|
$num = $this->math->cmp($num1, $num2) > 0; |
|
790
|
128 |
|
} elseif ($opCode === Opcodes::OP_LESSTHANOREQUAL) { |
|
791
|
30 |
|
$num = $this->math->cmp($num1, $num2) <= 0; |
|
792
|
98 |
|
} elseif ($opCode === Opcodes::OP_GREATERTHANOREQUAL) { |
|
793
|
30 |
|
$num = $this->math->cmp($num1, $num2) >= 0; |
|
794
|
68 |
|
} elseif ($opCode === Opcodes::OP_MIN) { |
|
795
|
24 |
|
$num = ($this->math->cmp($num1, $num2) <= 0) ? $num1 : $num2; |
|
796
|
16 |
|
} else { |
|
797
|
24 |
|
$num = ($this->math->cmp($num1, $num2) >= 0) ? $num1 : $num2; |
|
798
|
|
|
} |
|
799
|
|
|
|
|
800
|
426 |
|
$mainStack->pop(); |
|
801
|
426 |
|
$mainStack->pop(); |
|
802
|
426 |
|
$buffer = Number::int(gmp_strval($num, 10))->getBuffer(); |
|
803
|
426 |
|
$mainStack->push($buffer); |
|
804
|
|
|
|
|
805
|
426 |
|
if ($opCode === Opcodes::OP_NUMEQUALVERIFY) { |
|
806
|
12 |
|
if ($this->castToBool($mainStack[-1])) { |
|
807
|
12 |
|
$mainStack->pop(); |
|
808
|
8 |
|
} else { |
|
809
|
|
|
throw new \RuntimeException('NUM EQUAL VERIFY error'); |
|
810
|
|
|
} |
|
811
|
8 |
|
} |
|
812
|
426 |
|
break; |
|
813
|
|
|
|
|
814
|
915 |
|
case Opcodes::OP_WITHIN: |
|
815
|
51 |
|
if (count($mainStack) < 3) { |
|
816
|
6 |
|
throw new \RuntimeException('Invalid stack operation'); |
|
817
|
|
|
} |
|
818
|
|
|
|
|
819
|
45 |
|
$num1 = Number::buffer($mainStack[-3], $minimal)->getGmp(); |
|
820
|
42 |
|
$num2 = Number::buffer($mainStack[-2], $minimal)->getGmp(); |
|
821
|
39 |
|
$num3 = Number::buffer($mainStack[-1], $minimal)->getGmp(); |
|
822
|
|
|
|
|
823
|
36 |
|
$value = $this->math->cmp($num2, $num1) <= 0 && $this->math->cmp($num1, $num3) < 0; |
|
824
|
36 |
|
$mainStack->pop(); |
|
825
|
36 |
|
$mainStack->pop(); |
|
826
|
36 |
|
$mainStack->pop(); |
|
827
|
36 |
|
$mainStack->push($value ? $this->vchTrue : $this->vchFalse); |
|
828
|
36 |
|
break; |
|
829
|
|
|
|
|
830
|
|
|
// Hash operation |
|
831
|
864 |
|
case Opcodes::OP_RIPEMD160: |
|
832
|
856 |
|
case Opcodes::OP_SHA1: |
|
833
|
847 |
|
case Opcodes::OP_SHA256: |
|
834
|
840 |
|
case Opcodes::OP_HASH160: |
|
835
|
816 |
|
case Opcodes::OP_HASH256: |
|
836
|
252 |
|
if ($mainStack->isEmpty()) { |
|
837
|
36 |
|
throw new \RuntimeException('Invalid stack operation'); |
|
838
|
|
|
} |
|
839
|
|
|
|
|
840
|
216 |
|
$buffer = $mainStack[-1]; |
|
841
|
216 |
|
if ($opCode === Opcodes::OP_RIPEMD160) { |
|
842
|
18 |
|
$hash = Hash::ripemd160($buffer); |
|
843
|
211 |
|
} elseif ($opCode === Opcodes::OP_SHA1) { |
|
844
|
21 |
|
$hash = Hash::sha1($buffer); |
|
845
|
194 |
|
} elseif ($opCode === Opcodes::OP_SHA256) { |
|
846
|
21 |
|
$hash = Hash::sha256($buffer); |
|
847
|
175 |
|
} elseif ($opCode === Opcodes::OP_HASH160) { |
|
848
|
147 |
|
$hash = Hash::sha256ripe160($buffer); |
|
849
|
98 |
|
} else { |
|
850
|
18 |
|
$hash = Hash::sha256d($buffer); |
|
851
|
|
|
} |
|
852
|
|
|
|
|
853
|
216 |
|
$mainStack->pop(); |
|
854
|
216 |
|
$mainStack->push($hash); |
|
855
|
216 |
|
break; |
|
856
|
|
|
|
|
857
|
696 |
|
case Opcodes::OP_CODESEPARATOR: |
|
858
|
3 |
|
$hashStartPos = $parser->getPosition(); |
|
859
|
3 |
|
break; |
|
860
|
|
|
|
|
861
|
693 |
|
case Opcodes::OP_CHECKSIG: |
|
862
|
603 |
|
case Opcodes::OP_CHECKSIGVERIFY: |
|
863
|
270 |
|
if (count($mainStack) < 2) { |
|
864
|
9 |
|
throw new \RuntimeException('Invalid stack operation'); |
|
865
|
|
|
} |
|
866
|
|
|
|
|
867
|
261 |
|
$vchPubKey = $mainStack[-1]; |
|
868
|
261 |
|
$vchSig = $mainStack[-2]; |
|
869
|
|
|
|
|
870
|
261 |
|
$scriptCode = new Script($script->getBuffer()->slice($hashStartPos)); |
|
871
|
|
|
|
|
872
|
261 |
|
$success = $checker->checkSig($scriptCode, $vchSig, $vchPubKey, $sigVersion, $flags); |
|
873
|
|
|
|
|
874
|
186 |
|
$mainStack->pop(); |
|
875
|
186 |
|
$mainStack->pop(); |
|
876
|
186 |
|
$mainStack->push($success ? $this->vchTrue : $this->vchFalse); |
|
877
|
|
|
|
|
878
|
186 |
|
if ($opCode === Opcodes::OP_CHECKSIGVERIFY) { |
|
879
|
|
|
if ($success) { |
|
880
|
|
|
$mainStack->pop(); |
|
881
|
|
|
} else { |
|
882
|
|
|
throw new \RuntimeException('Checksig verify'); |
|
883
|
|
|
} |
|
884
|
|
|
} |
|
885
|
186 |
|
break; |
|
886
|
|
|
|
|
887
|
423 |
|
case Opcodes::OP_CHECKMULTISIG: |
|
888
|
346 |
|
case Opcodes::OP_CHECKMULTISIGVERIFY: |
|
889
|
327 |
|
$i = 1; |
|
890
|
327 |
|
if (count($mainStack) < $i) { |
|
891
|
3 |
|
throw new \RuntimeException('Invalid stack operation'); |
|
892
|
|
|
} |
|
893
|
|
|
|
|
894
|
324 |
|
$keyCount = Number::buffer($mainStack[-$i], $minimal)->getInt(); |
|
895
|
318 |
|
if ($keyCount < 0 || $keyCount > 20) { |
|
896
|
6 |
|
throw new \RuntimeException('OP_CHECKMULTISIG: Public key count exceeds 20'); |
|
897
|
|
|
} |
|
898
|
|
|
|
|
899
|
312 |
|
$opCount += $keyCount; |
|
900
|
312 |
|
$this->checkOpcodeCount($opCount); |
|
901
|
|
|
|
|
902
|
|
|
// Extract positions of the keys, and signatures, from the stack. |
|
903
|
312 |
|
$ikey = ++$i; |
|
904
|
312 |
|
$i += $keyCount; /** @var int $i */ |
|
905
|
312 |
|
if (count($mainStack) < $i) { |
|
906
|
3 |
|
throw new \RuntimeException('Invalid stack operation'); |
|
907
|
|
|
} |
|
908
|
|
|
|
|
909
|
309 |
|
$sigCount = Number::buffer($mainStack[-$i], $minimal)->getInt(); |
|
910
|
300 |
|
if ($sigCount < 0 || $sigCount > $keyCount) { |
|
911
|
6 |
|
throw new \RuntimeException('Invalid Signature count'); |
|
912
|
|
|
} |
|
913
|
|
|
|
|
914
|
294 |
|
$isig = ++$i; |
|
915
|
294 |
|
$i += $sigCount; |
|
916
|
|
|
|
|
917
|
|
|
// Extract the script since the last OP_CODESEPARATOR |
|
918
|
294 |
|
$scriptCode = new Script($script->getBuffer()->slice($hashStartPos)); |
|
919
|
|
|
|
|
920
|
294 |
|
$fSuccess = true; |
|
921
|
294 |
|
while ($fSuccess && $sigCount > 0) { |
|
922
|
|
|
// Fetch the signature and public key |
|
923
|
114 |
|
$sig = $mainStack[-$isig]; |
|
924
|
111 |
|
$pubkey = $mainStack[-$ikey]; |
|
925
|
|
|
|
|
926
|
111 |
|
if ($checker->checkSig($scriptCode, $sig, $pubkey, $sigVersion, $flags)) { |
|
927
|
55 |
|
$isig++; |
|
928
|
55 |
|
$sigCount--; |
|
929
|
36 |
|
} |
|
930
|
|
|
|
|
931
|
93 |
|
$ikey++; |
|
932
|
93 |
|
$keyCount--; |
|
933
|
|
|
|
|
934
|
|
|
// If there are more signatures left than keys left, |
|
935
|
|
|
// then too many signatures have failed. Exit early, |
|
936
|
|
|
// without checking any further signatures. |
|
937
|
93 |
|
if ($sigCount > $keyCount) { |
|
938
|
44 |
|
$fSuccess = false; |
|
939
|
30 |
|
} |
|
940
|
62 |
|
} |
|
941
|
|
|
|
|
942
|
267 |
|
while ($i-- > 1) { |
|
943
|
267 |
|
$mainStack->pop(); |
|
944
|
178 |
|
} |
|
945
|
|
|
|
|
946
|
|
|
// A bug causes CHECKMULTISIG to consume one extra argument |
|
947
|
|
|
// whose contents were not checked in any way. |
|
948
|
|
|
// |
|
949
|
|
|
// Unfortunately this is a potential source of mutability, |
|
950
|
|
|
// so optionally verify it is exactly equal to zero prior |
|
951
|
|
|
// to removing it from the stack. |
|
952
|
267 |
|
if ($mainStack->isEmpty()) { |
|
953
|
3 |
|
throw new \RuntimeException('Invalid stack operation'); |
|
954
|
|
|
} |
|
955
|
|
|
|
|
956
|
267 |
|
if ($flags & self::VERIFY_NULL_DUMMY && $mainStack[-1]->getSize() !== 0) { |
|
957
|
6 |
|
throw new ScriptRuntimeException(self::VERIFY_NULL_DUMMY, 'Extra P2SH stack value should be OP_0'); |
|
958
|
|
|
} |
|
959
|
|
|
|
|
960
|
261 |
|
$mainStack->pop(); |
|
961
|
261 |
|
$mainStack->push($fSuccess ? $this->vchTrue : $this->vchFalse); |
|
962
|
|
|
|
|
963
|
261 |
|
if ($opCode === Opcodes::OP_CHECKMULTISIGVERIFY) { |
|
964
|
90 |
|
if ($fSuccess) { |
|
965
|
90 |
|
$mainStack->pop(); |
|
966
|
60 |
|
} else { |
|
967
|
|
|
throw new \RuntimeException('OP_CHECKMULTISIG verify'); |
|
968
|
|
|
} |
|
969
|
60 |
|
} |
|
970
|
261 |
|
break; |
|
971
|
|
|
|
|
972
|
64 |
|
default: |
|
973
|
96 |
|
throw new \RuntimeException('Opcode not found'); |
|
974
|
64 |
|
} |
|
975
|
|
|
|
|
976
|
3087 |
|
if (count($mainStack) + count($altStack) > 1000) { |
|
977
|
1153 |
|
throw new \RuntimeException('Invalid stack size, exceeds 1000'); |
|
978
|
|
|
} |
|
979
|
2058 |
|
} |
|
980
|
2374 |
|
} |
|
981
|
|
|
|
|
982
|
3498 |
|
if (count($vfStack) !== 0) { |
|
983
|
18 |
|
throw new \RuntimeException('Unbalanced conditional at script end'); |
|
984
|
|
|
} |
|
985
|
|
|
|
|
986
|
3483 |
|
return true; |
|
987
|
1323 |
|
} catch (ScriptRuntimeException $e) { |
|
988
|
219 |
|
echo "\n Runtime: " . $e->getMessage() . "\n"; |
|
989
|
|
|
// Failure due to script tags, can access flag: $e->getFailureFlag() |
|
990
|
219 |
|
return false; |
|
991
|
1104 |
|
} catch (\Exception $e) { |
|
992
|
1104 |
|
echo "\n General: " . $e->getMessage() . PHP_EOL . $e->getTraceAsString(); |
|
993
|
1104 |
|
return false; |
|
994
|
|
|
} |
|
995
|
|
|
} |
|
996
|
|
|
} |
|
997
|
|
|
|
Bit-Wasp /
bitcoin-php
Loading history...
This check looks for variable assignements that are either overwritten by other assignments or where the variable is not used subsequently.
Both the
$myVarassignment in line 1 and the$higherassignment in line 2 are dead. The first because$myVaris never used and the second because$higheris always overwritten for every possible time line.