Bit-Wasp /
bitcoin-php
Complex classes like InputSigner often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes. You can also have a look at the cohesion graph to spot any un-connected, or weakly-connected components.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
While breaking up the class, it is a good idea to analyze how other classes use InputSigner, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 47 | class InputSigner implements InputSignerInterface |
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| 48 | { |
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| 49 | /** |
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| 50 | * @var array |
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| 51 | */ |
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| 52 | protected static $canSign = [ |
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| 53 | ScriptType::P2PKH, |
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| 54 | ScriptType::P2PK, |
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| 55 | ScriptType::MULTISIG |
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| 56 | ]; |
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| 57 | |||
| 58 | /** |
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| 59 | * @var array |
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| 60 | */ |
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| 61 | protected static $validP2sh = [ |
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| 62 | ScriptType::P2WKH, |
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| 63 | ScriptType::P2WSH, |
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| 64 | ScriptType::P2PKH, |
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| 65 | ScriptType::P2PK, |
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| 66 | ScriptType::MULTISIG |
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| 67 | ]; |
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| 68 | |||
| 69 | /** |
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| 70 | * @var EcAdapterInterface |
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| 71 | */ |
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| 72 | private $ecAdapter; |
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| 73 | |||
| 74 | /** |
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| 75 | * @var FullyQualifiedScript |
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| 76 | */ |
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| 77 | private $fqs; |
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| 78 | |||
| 79 | /** |
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| 80 | * @var bool |
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| 81 | */ |
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| 82 | private $padUnsignedMultisigs = false; |
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| 83 | |||
| 84 | /** |
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| 85 | * @var bool |
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| 86 | */ |
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| 87 | private $tolerateInvalidPublicKey = false; |
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| 88 | |||
| 89 | /** |
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| 90 | * @var bool |
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| 91 | */ |
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| 92 | private $allowComplexScripts = false; |
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| 93 | |||
| 94 | /** |
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| 95 | * @var SignData |
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| 96 | */ |
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| 97 | private $signData; |
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| 98 | |||
| 99 | /** |
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| 100 | * @var int |
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| 101 | */ |
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| 102 | private $flags; |
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| 103 | |||
| 104 | /** |
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| 105 | * @var TransactionInterface |
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| 106 | */ |
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| 107 | private $tx; |
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| 108 | |||
| 109 | /** |
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| 110 | * @var int |
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| 111 | */ |
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| 112 | private $nInput; |
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| 113 | |||
| 114 | /** |
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| 115 | * @var TransactionOutputInterface |
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| 116 | */ |
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| 117 | private $txOut; |
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| 118 | |||
| 119 | /** |
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| 120 | * @var Interpreter |
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| 121 | */ |
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| 122 | private $interpreter; |
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| 123 | |||
| 124 | /** |
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| 125 | * @var Checker |
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| 126 | */ |
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| 127 | private $signatureChecker; |
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| 128 | |||
| 129 | /** |
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| 130 | * @var TransactionSignatureSerializer |
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| 131 | */ |
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| 132 | private $txSigSerializer; |
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| 133 | |||
| 134 | /** |
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| 135 | * @var PublicKeySerializerInterface |
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| 136 | */ |
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| 137 | private $pubKeySerializer; |
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| 138 | |||
| 139 | /** |
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| 140 | * @var Conditional[]|Checksig[] |
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| 141 | */ |
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| 142 | private $steps = []; |
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| 143 | |||
| 144 | /** |
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| 145 | * InputSigner constructor. |
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| 146 | * |
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| 147 | * Note, the implementation of this class is considered internal |
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| 148 | * and only the methods exposed on InputSignerInterface should |
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| 149 | * be depended on to avoid BC breaks. |
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| 150 | * |
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| 151 | * The only recommended way to produce this class is using Signer::input() |
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| 152 | * |
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| 153 | * @param EcAdapterInterface $ecAdapter |
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| 154 | * @param TransactionInterface $tx |
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| 155 | * @param int $nInput |
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| 156 | * @param TransactionOutputInterface $txOut |
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| 157 | * @param SignData $signData |
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| 158 | * @param CheckerBase $checker |
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| 159 | * @param TransactionSignatureSerializer|null $sigSerializer |
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| 160 | * @param PublicKeySerializerInterface|null $pubKeySerializer |
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| 161 | */ |
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| 162 | 123 | public function __construct( |
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| 163 | EcAdapterInterface $ecAdapter, |
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| 164 | TransactionInterface $tx, |
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| 165 | int $nInput, |
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| 166 | TransactionOutputInterface $txOut, |
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| 167 | SignData $signData, |
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| 168 | CheckerBase $checker, |
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| 169 | TransactionSignatureSerializer $sigSerializer = null, |
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| 170 | PublicKeySerializerInterface $pubKeySerializer = null |
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| 171 | ) { |
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| 172 | 123 | $this->ecAdapter = $ecAdapter; |
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| 173 | 123 | $this->tx = $tx; |
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| 174 | 123 | $this->nInput = $nInput; |
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| 175 | 123 | $this->txOut = $txOut; |
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| 176 | 123 | $this->signData = $signData; |
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| 177 | |||
| 178 | 123 | $defaultFlags = Interpreter::VERIFY_DERSIG | Interpreter::VERIFY_P2SH | Interpreter::VERIFY_CHECKLOCKTIMEVERIFY | Interpreter::VERIFY_CHECKSEQUENCEVERIFY | Interpreter::VERIFY_WITNESS; |
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| 179 | 123 | $this->flags = $this->signData->hasSignaturePolicy() ? $this->signData->getSignaturePolicy() : $defaultFlags; |
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| 180 | |||
| 181 | 123 | $this->txSigSerializer = $sigSerializer ?: new TransactionSignatureSerializer(EcSerializer::getSerializer(DerSignatureSerializerInterface::class, true, $ecAdapter)); |
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| 182 | 123 | $this->pubKeySerializer = $pubKeySerializer ?: EcSerializer::getSerializer(PublicKeySerializerInterface::class, true, $ecAdapter); |
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| 183 | 123 | $this->interpreter = new Interpreter($this->ecAdapter); |
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| 184 | 123 | $this->signatureChecker = $checker; |
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| 185 | 123 | } |
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| 186 | |||
| 187 | /** |
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| 188 | * Ensures a FullyQualifiedScript will be accepted |
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| 189 | * by the InputSigner. |
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| 190 | * |
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| 191 | * @param FullyQualifiedScript $script |
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| 192 | */ |
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| 193 | 81 | public static function ensureAcceptableScripts(FullyQualifiedScript $script) |
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| 194 | { |
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| 195 | 81 | $spkType = $script->scriptPubKey()->getType(); |
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| 196 | |||
| 197 | 81 | if ($spkType !== ScriptType::P2SH) { |
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| 198 | 55 | if (!in_array($spkType, self::$validP2sh)) { |
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| 199 | 1 | throw new UnsupportedScript("scriptPubKey not supported"); |
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| 200 | } |
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| 201 | 54 | $hasWitnessScript = $spkType === ScriptType::P2WSH; |
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| 202 | } else { |
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| 203 | 26 | $rsType = $script->redeemScript()->getType(); |
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| 204 | 26 | if (!in_array($rsType, self::$validP2sh)) { |
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| 205 | 1 | throw new UnsupportedScript("Unsupported pay-to-script-hash script"); |
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| 206 | } |
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| 207 | 25 | $hasWitnessScript = $rsType === ScriptType::P2WSH; |
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| 208 | } |
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| 209 | |||
| 210 | 79 | if ($hasWitnessScript) { |
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| 211 | 22 | $wsType = $script->witnessScript()->getType(); |
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| 212 | 22 | if (!in_array($wsType, self::$canSign)) { |
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| 213 | 1 | throw new UnsupportedScript('Unsupported witness-script-hash script'); |
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| 214 | } |
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| 215 | } |
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| 216 | 78 | } |
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| 217 | |||
| 218 | /** |
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| 219 | * It ensures that violating the following prevents instance creation |
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| 220 | * - the scriptPubKey can be directly signed, or leads to P2SH/P2WSH/P2WKH |
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| 221 | * - the P2SH script covers signable types and P2WSH/P2WKH |
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| 222 | * - the witnessScript covers signable types only |
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| 223 | * @return $this|InputSigner |
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| 224 | * @throws ScriptRuntimeException |
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| 225 | * @throws SignerException |
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| 226 | * @throws \Exception |
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| 227 | */ |
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| 228 | 123 | public function extract() |
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| 229 | { |
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| 230 | 123 | $scriptSig = $this->tx->getInput($this->nInput)->getScript(); |
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| 231 | 122 | $witnesses = $this->tx->getWitnesses(); |
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| 232 | 122 | $witness = array_key_exists($this->nInput, $witnesses) ? $witnesses[$this->nInput] : new ScriptWitness(); |
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| 233 | |||
| 234 | 122 | $fqs = FullyQualifiedScript::fromTxData($this->txOut->getScript(), $scriptSig, $witness, $this->signData); |
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| 235 | 114 | if (!$this->allowComplexScripts) { |
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| 236 | 81 | self::ensureAcceptableScripts($fqs); |
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| 237 | } |
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| 238 | |||
| 239 | 111 | $this->fqs = $fqs; |
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| 240 | 111 | $this->steps = $this->extractScript( |
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| 241 | 111 | $this->fqs->signScript(), |
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| 242 | 111 | $this->fqs->extractStack($scriptSig, $witness), |
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| 243 | 111 | $this->signData |
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| 244 | ); |
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| 245 | |||
| 246 | 96 | return $this; |
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| 247 | } |
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| 248 | |||
| 249 | /** |
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| 250 | * @param bool $setting |
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| 251 | * @return $this |
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| 252 | */ |
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| 253 | 108 | public function padUnsignedMultisigs(bool $setting) |
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| 254 | { |
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| 255 | 108 | $this->padUnsignedMultisigs = $setting; |
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| 256 | 108 | return $this; |
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| 257 | } |
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| 258 | |||
| 259 | /** |
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| 260 | * @param bool $setting |
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| 261 | * @return $this |
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| 262 | */ |
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| 263 | 108 | public function tolerateInvalidPublicKey(bool $setting) |
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| 264 | { |
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| 265 | 108 | $this->tolerateInvalidPublicKey = $setting; |
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| 266 | 108 | return $this; |
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| 267 | } |
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| 268 | |||
| 269 | /** |
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| 270 | * @param bool $setting |
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| 271 | * @return $this |
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| 272 | */ |
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| 273 | 108 | public function allowComplexScripts(bool $setting) |
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| 274 | { |
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| 275 | 108 | $this->allowComplexScripts = $setting; |
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| 276 | 108 | return $this; |
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| 277 | } |
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| 278 | |||
| 279 | /** |
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| 280 | * @param BufferInterface $vchPubKey |
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| 281 | * @return PublicKeyInterface|null |
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| 282 | * @throws \Exception |
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| 283 | */ |
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| 284 | 96 | protected function parseStepPublicKey(BufferInterface $vchPubKey) |
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| 285 | { |
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| 286 | try { |
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| 287 | 96 | return $this->pubKeySerializer->parse($vchPubKey); |
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| 288 | 3 | } catch (\Exception $e) { |
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| 289 | 3 | if ($this->tolerateInvalidPublicKey) { |
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| 290 | 1 | return null; |
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| 291 | } |
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| 292 | |||
| 293 | 2 | throw $e; |
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| 294 | } |
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| 295 | } |
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| 296 | |||
| 297 | /** |
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| 298 | * @param ScriptInterface $script |
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| 299 | * @param BufferInterface[] $signatures |
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| 300 | * @param BufferInterface[] $publicKeys |
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| 301 | * @param int $sigVersion |
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| 302 | * @return \SplObjectStorage |
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| 303 | * @throws \BitWasp\Bitcoin\Exceptions\ScriptRuntimeException |
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| 304 | */ |
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| 305 | 30 | private function sortMultisigs(ScriptInterface $script, array $signatures, array $publicKeys, int $sigVersion): \SplObjectStorage |
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| 306 | { |
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| 307 | 30 | $sigCount = count($signatures); |
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| 308 | 30 | $keyCount = count($publicKeys); |
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| 309 | 30 | $ikey = $isig = 0; |
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| 310 | 30 | $fSuccess = true; |
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| 311 | 30 | $result = new \SplObjectStorage; |
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| 312 | |||
| 313 | 30 | while ($fSuccess && $sigCount > 0) { |
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| 314 | // Fetch the signature and public key |
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| 315 | 30 | $sig = $signatures[$isig]; |
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| 316 | 30 | $pubkey = $publicKeys[$ikey]; |
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| 317 | |||
| 318 | 30 | if ($this->signatureChecker->checkSig($script, $sig, $pubkey, $sigVersion, $this->flags)) { |
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| 319 | 29 | $result[$pubkey] = $sig; |
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| 320 | 29 | $isig++; |
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| 321 | 29 | $sigCount--; |
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| 322 | } |
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| 323 | |||
| 324 | 30 | $ikey++; |
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| 325 | 30 | $keyCount--; |
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| 326 | |||
| 327 | // If there are more signatures left than keys left, |
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| 328 | // then too many signatures have failed. Exit early, |
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| 329 | // without checking any further signatures. |
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| 330 | 30 | if ($sigCount > $keyCount) { |
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| 331 | 1 | $fSuccess = false; |
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| 332 | } |
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| 333 | } |
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| 334 | |||
| 335 | 30 | return $result; |
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| 336 | } |
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| 337 | |||
| 338 | /** |
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| 339 | * @param array $decoded |
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| 340 | * @param null $solution |
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| 341 | * @return null|TimeLock|Checksig |
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| 342 | */ |
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| 343 | 111 | private function classifySignStep(array $decoded, &$solution = null) |
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| 344 | { |
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| 345 | try { |
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| 346 | 111 | $details = Multisig::fromDecodedScript($decoded, $this->pubKeySerializer, true); |
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| 347 | 38 | $solution = $details->getKeyBuffers(); |
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| 348 | 38 | return new Checksig($details); |
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| 349 | 111 | } catch (\Exception $e) { |
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| 350 | } |
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| 351 | |||
| 352 | try { |
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| 353 | 111 | $details = PayToPubkey::fromDecodedScript($decoded, true); |
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| 354 | 46 | $solution = $details->getKeyBuffer(); |
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| 355 | 46 | return new Checksig($details); |
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| 356 | 111 | } catch (\Exception $e) { |
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| 357 | } |
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| 358 | |||
| 359 | try { |
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| 360 | 111 | $details = PayToPubkeyHash::fromDecodedScript($decoded, true); |
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| 361 | 38 | $solution = $details->getPubKeyHash(); |
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| 362 | 38 | return new Checksig($details); |
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| 363 | 111 | } catch (\Exception $e) { |
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| 364 | } |
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| 365 | |||
| 366 | try { |
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| 367 | 111 | $details = CheckLocktimeVerify::fromDecodedScript($decoded); |
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| 368 | 8 | return new TimeLock($details); |
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| 369 | 111 | } catch (\Exception $e) { |
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| 370 | } |
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| 371 | |||
| 372 | try { |
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| 373 | 111 | $details = CheckSequenceVerify::fromDecodedScript($decoded); |
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| 374 | 7 | return new TimeLock($details); |
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| 375 | 111 | } catch (\Exception $e) { |
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| 376 | } |
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| 377 | |||
| 378 | 111 | return null; |
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| 379 | } |
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| 380 | |||
| 381 | /** |
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| 382 | * @param Operation[] $scriptOps |
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| 383 | * @return Checksig[] |
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| 384 | */ |
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| 385 | 111 | public function parseSequence(array $scriptOps) |
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| 386 | { |
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| 387 | 111 | $j = 0; |
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| 388 | 111 | $l = count($scriptOps); |
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| 389 | 111 | $result = []; |
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| 390 | 111 | while ($j < $l) { |
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| 391 | 111 | $step = null; |
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| 392 | 111 | $slice = null; |
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| 393 | |||
| 394 | // increment the $last, and break if it's valid |
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| 395 | 111 | for ($i = 0; $i < ($l - $j) + 1; $i++) { |
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| 396 | 111 | $slice = array_slice($scriptOps, $j, $i); |
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| 397 | 111 | $step = $this->classifySignStep($slice, $solution); |
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| 398 | 111 | if ($step !== null) { |
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| 399 | 111 | break; |
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| 400 | } |
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| 401 | } |
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| 402 | |||
| 403 | 111 | if (null === $step) { |
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| 404 | throw new \RuntimeException("Invalid script"); |
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| 405 | } else { |
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| 406 | 111 | $j += $i; |
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| 407 | 111 | $result[] = $step; |
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| 408 | } |
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| 409 | } |
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| 410 | |||
| 411 | 111 | return $result; |
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| 412 | } |
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| 413 | |||
| 414 | /** |
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| 415 | * @param Operation $operation |
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| 416 | * @param Stack $mainStack |
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| 417 | * @param bool[] $pathData |
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| 418 | * @return Conditional |
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| 419 | */ |
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| 420 | 11 | public function extractConditionalOp(Operation $operation, Stack $mainStack, array &$pathData): Conditional |
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| 421 | { |
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| 422 | 11 | $opValue = null; |
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| 423 | |||
| 424 | 11 | if (!$mainStack->isEmpty()) { |
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| 425 | 11 | if (count($pathData) === 0) { |
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| 426 | throw new \RuntimeException("Extracted conditional op (including mainstack) without corresponding element in path data"); |
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| 427 | } |
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| 428 | |||
| 429 | 11 | $opValue = $this->interpreter->castToBool($mainStack->pop()); |
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| 430 | 11 | $dataValue = array_shift($pathData); |
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| 431 | 11 | if ($opValue !== $dataValue) { |
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| 432 | 11 | throw new \RuntimeException("Current stack doesn't follow branch path"); |
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| 433 | } |
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| 434 | } else { |
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| 435 | 9 | if (count($pathData) === 0) { |
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| 436 | throw new \RuntimeException("Extracted conditional op without corresponding element in path data"); |
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| 437 | } |
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| 438 | |||
| 439 | 9 | $opValue = array_shift($pathData); |
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| 440 | } |
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| 441 | |||
| 442 | 11 | $conditional = new Conditional($operation->getOp()); |
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| 443 | |||
| 444 | 11 | if ($opValue !== null) { |
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| 445 | 11 | if (!is_bool($opValue)) { |
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| 446 | throw new \RuntimeException("Sanity check, path value (likely from pathData) was not a bool"); |
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| 447 | } |
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| 448 | |||
| 449 | 11 | $conditional->setValue($opValue); |
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| 450 | } |
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| 451 | |||
| 452 | 11 | return $conditional; |
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| 453 | } |
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| 454 | |||
| 455 | /** |
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| 456 | * @param int $idx |
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| 457 | * @return Checksig|Conditional |
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| 458 | */ |
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| 459 | 18 | public function step(int $idx) |
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| 460 | { |
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| 461 | 18 | if (!array_key_exists($idx, $this->steps)) { |
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| 462 | throw new \RuntimeException("Out of range index for input sign step"); |
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| 463 | } |
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| 464 | |||
| 465 | 18 | return $this->steps[$idx]; |
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| 466 | } |
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| 467 | |||
| 468 | /** |
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| 469 | * @param OutputData $signScript |
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| 470 | * @param Stack $stack |
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| 471 | * @param SignData $signData |
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| 472 | * @return array |
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| 473 | * @throws ScriptRuntimeException |
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| 474 | * @throws SignerException |
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| 475 | * @throws \Exception |
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| 476 | */ |
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| 477 | 111 | public function extractScript(OutputData $signScript, Stack $stack, SignData $signData): array |
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| 478 | { |
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| 479 | 111 | $logicInterpreter = new BranchInterpreter(); |
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| 480 | 111 | $tree = $logicInterpreter->getScriptTree($signScript->getScript()); |
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| 481 | |||
| 482 | 111 | if ($tree->hasMultipleBranches()) { |
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| 483 | 11 | $logicalPath = $signData->getLogicalPath(); |
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| 484 | // we need a function like findWitnessScript to 'check' |
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| 485 | // partial signatures against _our_ path |
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| 486 | } else { |
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| 487 | 100 | $logicalPath = []; |
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| 488 | } |
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| 489 | |||
| 490 | $scriptSections = $tree |
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| 491 | 111 | ->getBranchByPath($logicalPath) |
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| 492 | 111 | ->getScriptSections(); |
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| 493 | |||
| 494 | 111 | $vfStack = new Stack(); |
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| 495 | |||
| 496 | 111 | $pathCopy = $logicalPath; |
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| 497 | 111 | $steps = []; |
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| 498 | 111 | foreach ($scriptSections as $i => $scriptSection) { |
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| 499 | /** @var Operation[] $scriptSection */ |
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| 500 | 111 | $fExec = !$this->interpreter->checkExec($vfStack, false); |
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| 501 | 111 | if (count($scriptSection) === 1 && $scriptSection[0]->isLogical()) { |
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| 502 | 11 | $op = $scriptSection[0]; |
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| 503 | 11 | switch ($op->getOp()) { |
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| 504 | 11 | case Opcodes::OP_IF: |
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| 505 | 11 | case Opcodes::OP_NOTIF: |
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| 506 | 11 | $value = false; |
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| 507 | 11 | if ($fExec) { |
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| 508 | // Pop from mainStack if $fExec |
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| 509 | 11 | $step = $this->extractConditionalOp($op, $stack, $pathCopy); |
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| 510 | |||
| 511 | // the Conditional has a value in this case: |
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| 512 | 11 | $value = $step->getValue(); |
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| 513 | |||
| 514 | // Connect the last operation (if there is one) |
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| 515 | // with the last step with isRequired==$value |
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| 516 | // todo: check this part out.. |
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| 517 | 11 | for ($j = count($steps) - 1; $j >= 0; $j--) { |
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| 518 | 4 | if ($steps[$j] instanceof Checksig && $value === $steps[$j]->isRequired()) { |
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| 519 | 4 | $step->providedBy($steps[$j]); |
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| 520 | 4 | break; |
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| 521 | } |
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| 522 | } |
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| 523 | } else { |
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| 524 | 1 | $step = new Conditional($op->getOp()); |
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| 525 | } |
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| 526 | |||
| 527 | 11 | $steps[] = $step; |
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| 528 | |||
| 529 | 11 | if ($op->getOp() === Opcodes::OP_NOTIF) { |
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| 530 | 5 | $value = !$value; |
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| 531 | } |
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| 532 | |||
| 533 | 11 | $vfStack->push($value); |
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| 534 | 11 | break; |
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| 535 | 11 | case Opcodes::OP_ENDIF: |
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| 536 | 11 | $vfStack->pop(); |
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| 537 | 11 | break; |
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| 538 | 9 | case Opcodes::OP_ELSE: |
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| 539 | 9 | $vfStack->push(!$vfStack->pop()); |
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| 540 | 11 | break; |
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| 541 | } |
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| 542 | } else { |
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| 543 | 111 | $templateTypes = $this->parseSequence($scriptSection); |
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| 544 | |||
| 545 | // Detect if effect on mainStack is `false` |
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| 546 | 111 | $resolvesFalse = count($pathCopy) > 0 && !$pathCopy[0]; |
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| 547 | 111 | if ($resolvesFalse) { |
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| 548 | 2 | if (count($templateTypes) > 1) { |
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| 549 | throw new UnsupportedScript("Unsupported script, multiple steps to segment which is negated"); |
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| 550 | } |
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| 551 | } |
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| 552 | |||
| 553 | 111 | foreach ($templateTypes as $k => $checksig) { |
|
| 554 | 111 | if ($fExec) { |
|
| 555 | 111 | if ($checksig instanceof Checksig) { |
|
| 556 | 101 | $this->extractChecksig($signScript->getScript(), $checksig, $stack, $this->fqs->sigVersion(), $resolvesFalse); |
|
| 557 | |||
| 558 | // If this statement results is later consumed |
||
| 559 | // by a conditional which would be false, mark |
||
| 560 | // this operation as not required |
||
| 561 | 96 | if ($resolvesFalse) { |
|
| 562 | 96 | $checksig->setRequired(false); |
|
| 563 | } |
||
| 564 | 15 | } else if ($checksig instanceof TimeLock) { |
|
| 565 | 15 | $this->checkTimeLock($checksig); |
|
| 566 | } |
||
| 567 | |||
| 568 | 96 | $steps[] = $checksig; |
|
| 569 | } |
||
| 570 | } |
||
| 571 | } |
||
| 572 | } |
||
| 573 | |||
| 574 | 96 | return $steps; |
|
| 575 | } |
||
| 576 | |||
| 577 | /** |
||
| 578 | * @param int $verify |
||
| 579 | * @param int $input |
||
| 580 | * @param int $threshold |
||
| 581 | * @return int |
||
| 582 | */ |
||
| 583 | 5 | private function compareRangeAgainstThreshold($verify, $input, $threshold) |
|
| 584 | { |
||
| 585 | 5 | if ($verify <= $threshold && $input > $threshold) { |
|
| 586 | 2 | return -1; |
|
| 587 | } |
||
| 588 | |||
| 589 | 3 | if ($verify > $threshold && $input <= $threshold) { |
|
| 590 | 2 | return 1; |
|
| 591 | } |
||
| 592 | |||
| 593 | 1 | return 0; |
|
| 594 | } |
||
| 595 | |||
| 596 | /** |
||
| 597 | * @param TimeLock $timelock |
||
| 598 | */ |
||
| 599 | 15 | public function checkTimeLock(TimeLock $timelock) |
|
| 600 | { |
||
| 601 | 15 | $info = $timelock->getInfo(); |
|
| 602 | 15 | if (($this->flags & Interpreter::VERIFY_CHECKLOCKTIMEVERIFY) != 0 && $info instanceof CheckLocktimeVerify) { |
|
| 603 | 8 | $verifyLocktime = $info->getLocktime(); |
|
| 604 | 8 | if (!$this->signatureChecker->checkLockTime(Number::int($verifyLocktime))) { |
|
| 605 | 5 | $input = $this->tx->getInput($this->nInput); |
|
| 606 | 5 | if ($input->isFinal()) { |
|
| 607 | 2 | throw new \RuntimeException("Input sequence is set to max, therefore CHECKLOCKTIMEVERIFY would fail"); |
|
| 608 | } |
||
| 609 | |||
| 610 | 3 | $locktime = $this->tx->getLockTime(); |
|
| 611 | 3 | $cmp = $this->compareRangeAgainstThreshold($verifyLocktime, $locktime, Locktime::BLOCK_MAX); |
|
| 612 | 3 | if ($cmp === -1) { |
|
| 613 | 1 | throw new \RuntimeException("CLTV was for block height, but tx locktime was in timestamp range"); |
|
| 614 | 2 | } else if ($cmp === 1) { |
|
| 615 | 1 | throw new \RuntimeException("CLTV was for timestamp, but tx locktime was in block range"); |
|
| 616 | } |
||
| 617 | |||
| 618 | 1 | $requiredTime = ($info->isLockedToBlock() ? "block {$info->getLocktime()}" : "{$info->getLocktime()}s (median time past)"); |
|
| 619 | 1 | throw new \RuntimeException("Output is not yet spendable, must wait until {$requiredTime}"); |
|
| 620 | } |
||
| 621 | } |
||
| 622 | |||
| 623 | 10 | if (($this->flags & Interpreter::VERIFY_CHECKSEQUENCEVERIFY) != 0 && $info instanceof CheckSequenceVerify) { |
|
| 624 | // Future soft-fork extensibility, NOP if disabled flag |
||
| 625 | 7 | if (($info->getRelativeLockTime() & TransactionInput::SEQUENCE_LOCKTIME_DISABLE_FLAG) != 0) { |
|
| 626 | return; |
||
| 627 | } |
||
| 628 | |||
| 629 | 7 | if (!$this->signatureChecker->checkSequence(Number::int($info->getRelativeLockTime()))) { |
|
| 630 | 5 | if ($this->tx->getVersion() < 2) { |
|
| 631 | 2 | throw new \RuntimeException("Transaction version must be 2 or greater for CSV"); |
|
| 632 | } |
||
| 633 | |||
| 634 | 3 | $input = $this->tx->getInput($this->nInput); |
|
| 635 | 3 | if ($input->isFinal()) { |
|
| 636 | 1 | throw new \RuntimeException("Sequence LOCKTIME_DISABLE_FLAG is set - not allowed on CSV output"); |
|
| 637 | } |
||
| 638 | |||
| 639 | 2 | $cmp = $this->compareRangeAgainstThreshold($info->getRelativeLockTime(), $input->getSequence(), TransactionInput::SEQUENCE_LOCKTIME_TYPE_FLAG); |
|
| 640 | 2 | if ($cmp === -1) { |
|
| 641 | 1 | throw new \RuntimeException("CSV was for block height, but txin sequence was in timestamp range"); |
|
| 642 | 1 | } else if ($cmp === 1) { |
|
| 643 | 1 | throw new \RuntimeException("CSV was for timestamp, but txin sequence was in block range"); |
|
| 644 | } |
||
| 645 | |||
| 646 | $masked = $info->getRelativeLockTime() & TransactionInput::SEQUENCE_LOCKTIME_MASK; |
||
| 647 | $requiredLock = "{$masked} " . ($info->isRelativeToBlock() ? " (blocks)" : "(seconds after txOut)"); |
||
| 648 | throw new \RuntimeException("Output unspendable with this sequence, must be locked for {$requiredLock}"); |
||
| 649 | } |
||
| 650 | } |
||
| 651 | 5 | } |
|
| 652 | |||
| 653 | /** |
||
| 654 | * @param ScriptInterface $script |
||
| 655 | * @param BufferInterface $vchSig |
||
| 656 | * @param BufferInterface $vchKey |
||
| 657 | * @return bool |
||
| 658 | */ |
||
| 659 | 35 | private function checkSignature(ScriptInterface $script, BufferInterface $vchSig, BufferInterface $vchKey) |
|
| 660 | { |
||
| 661 | try { |
||
| 662 | 35 | return $this->signatureChecker->checkSig($script, $vchSig, $vchKey, $this->fqs->sigVersion(), $this->flags); |
|
| 663 | } catch (ScriptRuntimeException $e) { |
||
| 664 | return false; |
||
| 665 | } |
||
| 666 | } |
||
| 667 | |||
| 668 | /** |
||
| 669 | * This function is strictly for $canSign types. |
||
| 670 | * It will extract signatures/publicKeys when given $outputData, and $stack. |
||
| 671 | * $stack is the result of decompiling a scriptSig, or taking the witness data. |
||
| 672 | * |
||
| 673 | * @param ScriptInterface $script |
||
| 674 | * @param Checksig $checksig |
||
| 675 | * @param Stack $stack |
||
| 676 | * @param int $sigVersion |
||
| 677 | * @param bool $expectFalse |
||
| 678 | * @throws ScriptRuntimeException |
||
| 679 | * @throws SignerException |
||
| 680 | * @throws \Exception |
||
| 681 | */ |
||
| 682 | 101 | public function extractChecksig(ScriptInterface $script, Checksig $checksig, Stack $stack, int $sigVersion, bool $expectFalse) |
|
| 683 | { |
||
| 684 | 101 | $size = count($stack); |
|
| 685 | |||
| 686 | 101 | if ($checksig->getType() === ScriptType::P2PKH) { |
|
| 687 | 38 | if ($size > 1) { |
|
| 688 | 35 | $vchPubKey = $stack->pop(); |
|
| 689 | 35 | $vchSig = $stack->pop(); |
|
| 690 | |||
| 691 | 35 | $value = false; |
|
| 692 | 35 | if (!$expectFalse) { |
|
| 693 | 35 | $value = $this->checkSignature($script, $vchSig, $vchPubKey); |
|
| 694 | |||
| 695 | 35 | if (!$value) { |
|
| 696 | 1 | throw new SignerException('Existing signatures are invalid!'); |
|
| 697 | } |
||
| 698 | } |
||
| 699 | |||
| 700 | 34 | if (!$checksig->isVerify()) { |
|
| 701 | 34 | $stack->push($value ? new Buffer("\x01") : new Buffer()); |
|
| 702 | } |
||
| 703 | |||
| 704 | 34 | if (!$expectFalse) { |
|
| 705 | $checksig |
||
| 706 | 34 | ->setSignature(0, $this->txSigSerializer->parse($vchSig)) |
|
| 707 | 37 | ->setKey(0, $this->parseStepPublicKey($vchPubKey)) |
|
| 708 | ; |
||
| 709 | } |
||
| 710 | } |
||
| 711 | 67 | } else if ($checksig->getType() === ScriptType::P2PK) { |
|
| 712 | 36 | if ($size > 0) { |
|
| 713 | 28 | $vchSig = $stack->pop(); |
|
| 714 | |||
| 715 | 28 | $value = false; |
|
| 716 | 28 | if (!$expectFalse) { |
|
| 717 | 28 | $value = $this->signatureChecker->checkSig($script, $vchSig, $checksig->getSolution(), $this->fqs->sigVersion(), $this->flags); |
|
| 718 | 28 | if (!$value) { |
|
| 719 | 1 | throw new SignerException('Existing signatures are invalid!'); |
|
| 720 | } |
||
| 721 | } |
||
| 722 | |||
| 723 | 27 | if (!$checksig->isVerify()) { |
|
| 724 | 25 | $stack->push($value ? new Buffer("\x01") : new Buffer()); |
|
| 725 | } |
||
| 726 | |||
| 727 | 27 | if (!$expectFalse) { |
|
| 728 | 27 | $checksig->setSignature(0, $this->txSigSerializer->parse($vchSig)); |
|
| 729 | } |
||
| 730 | } |
||
| 731 | |||
| 732 | 35 | $checksig->setKey(0, $this->parseStepPublicKey($checksig->getSolution())); |
|
| 733 | 38 | } else if (ScriptType::MULTISIG === $checksig->getType()) { |
|
| 734 | /** @var Multisig $info */ |
||
| 735 | 38 | $info = $checksig->getInfo(); |
|
| 736 | 38 | $keyBuffers = $info->getKeyBuffers(); |
|
| 737 | 38 | foreach ($keyBuffers as $idx => $keyBuf) { |
|
| 738 | 38 | $checksig->setKey($idx, $this->parseStepPublicKey($keyBuf)); |
|
| 739 | } |
||
| 740 | |||
| 741 | 36 | $value = false; |
|
| 742 | 36 | if ($this->padUnsignedMultisigs) { |
|
| 743 | // Multisig padding is only used for partially signed transactions, |
||
| 744 | // never fully signed. It is recognized by a scriptSig with $keyCount+1 |
||
| 745 | // values (including the dummy), with one for each candidate signature, |
||
| 746 | // such that $this->signatures state is captured. |
||
| 747 | // The feature serves to skip validation/sorting an incomplete multisig. |
||
| 748 | |||
| 749 | 14 | if ($size === 1 + $info->getKeyCount()) { |
|
| 750 | 2 | $sigBufCount = 0; |
|
| 751 | 2 | $null = new Buffer(); |
|
| 752 | 2 | $keyToSigMap = new \SplObjectStorage(); |
|
| 753 | |||
| 754 | // Reproduce $keyToSigMap and $sigBufCount |
||
| 755 | 2 | for ($i = 0; $i < $info->getKeyCount(); $i++) { |
|
| 756 | 2 | if (!$stack[-1 - $i]->equals($null)) { |
|
| 757 | 2 | $keyToSigMap[$keyBuffers[$i]] = $stack[-1 - $i]; |
|
| 758 | 2 | $sigBufCount++; |
|
| 759 | } |
||
| 760 | } |
||
| 761 | |||
| 762 | // We observed $this->requiredSigs sigs, therefore we can |
||
| 763 | // say the implementation is incompatible |
||
| 764 | 2 | if ($sigBufCount === $checksig->getRequiredSigs()) { |
|
| 765 | 2 | throw new SignerException("Padding is forbidden for a fully signed multisig script"); |
|
| 766 | } |
||
| 767 | |||
| 768 | $toDelete = 1 + $info->getKeyCount(); |
||
| 769 | $value = true; |
||
| 770 | } |
||
| 771 | } |
||
| 772 | |||
| 773 | 36 | if (!isset($toDelete) || !isset($keyToSigMap)) { |
|
| 774 | // Check signatures irrespective of scriptSig size, primes Checker cache, and need info |
||
| 775 | 36 | $sigBufs = []; |
|
| 776 | 36 | $max = min($checksig->getRequiredSigs(), $size - 1); |
|
| 777 | 36 | for ($i = 0; $i < $max; $i++) { |
|
| 778 | 31 | $vchSig = $stack[-1 - $i]; |
|
| 779 | 31 | $sigBufs[] = $vchSig; |
|
| 780 | } |
||
| 781 | |||
| 782 | 36 | $sigBufs = array_reverse($sigBufs); |
|
| 783 | 36 | $sigBufCount = count($sigBufs); |
|
| 784 | |||
| 785 | 36 | if (!$expectFalse) { |
|
| 786 | 35 | if ($sigBufCount > 0) { |
|
| 787 | 30 | $keyToSigMap = $this->sortMultiSigs($script, $sigBufs, $keyBuffers, $sigVersion); |
|
| 788 | // Here we learn if any signatures were invalid, it won't be in the map. |
||
| 789 | 30 | if ($sigBufCount !== count($keyToSigMap)) { |
|
| 790 | 1 | throw new SignerException('Existing signatures are invalid!'); |
|
| 791 | } |
||
| 792 | 29 | $toDelete = 1 + count($keyToSigMap); |
|
| 793 | } else { |
||
| 794 | 34 | $toDelete = 0; |
|
| 795 | 34 | $keyToSigMap = new \SplObjectStorage(); |
|
| 796 | } |
||
| 797 | 34 | $value = true; |
|
| 798 | } else { |
||
| 799 | // todo: should check that all signatures are zero |
||
| 800 | 1 | $keyToSigMap = new \SplObjectStorage(); |
|
| 801 | 1 | $toDelete = min($stack->count(), 1 + $info->getRequiredSigCount()); |
|
| 802 | 1 | $value = false; |
|
| 803 | } |
||
| 804 | } |
||
| 805 | |||
| 806 | 35 | while ($toDelete--) { |
|
| 807 | 30 | $stack->pop(); |
|
| 808 | } |
||
| 809 | |||
| 810 | 35 | foreach ($keyBuffers as $idx => $key) { |
|
| 811 | 35 | if (isset($keyToSigMap[$key])) { |
|
| 812 | 35 | $checksig->setSignature($idx, $this->txSigSerializer->parse($keyToSigMap[$key])); |
|
| 813 | } |
||
| 814 | } |
||
| 815 | |||
| 816 | 35 | if (!$checksig->isVerify()) { |
|
| 817 | 35 | $stack->push($value ? new Buffer("\x01") : new Buffer()); |
|
| 818 | } |
||
| 819 | } else { |
||
| 820 | throw new UnsupportedScript('Unsupported output type passed to extractFromValues'); |
||
| 821 | } |
||
| 822 | 96 | } |
|
| 823 | |||
| 824 | /** |
||
| 825 | * Pure function to produce a signature hash for a given $scriptCode, $sigHashType, $sigVersion. |
||
| 826 | * |
||
| 827 | * @param ScriptInterface $scriptCode |
||
| 828 | * @param int $sigHashType |
||
| 829 | * @param int $sigVersion |
||
| 830 | * @throws SignerException |
||
| 831 | * @return BufferInterface |
||
| 832 | */ |
||
| 833 | 89 | public function calculateSigHashUnsafe(ScriptInterface $scriptCode, int $sigHashType, int $sigVersion): BufferInterface |
|
| 841 | |||
| 842 | /** |
||
| 843 | * Calculates the signature hash for the input for the given $sigHashType. |
||
| 844 | * |
||
| 845 | * @param int $sigHashType |
||
| 846 | * @return BufferInterface |
||
| 847 | * @throws SignerException |
||
| 848 | */ |
||
| 849 | 1 | public function getSigHash(int $sigHashType): BufferInterface |
|
| 850 | { |
||
| 851 | 1 | return $this->calculateSigHashUnsafe($this->fqs->signScript()->getScript(), $sigHashType, $this->fqs->sigVersion()); |
|
| 852 | } |
||
| 853 | |||
| 854 | /** |
||
| 855 | * Pure function to produce a signature for a given $key, $scriptCode, $sigHashType, $sigVersion. |
||
| 856 | * |
||
| 857 | * @param PrivateKeyInterface $key |
||
| 858 | * @param ScriptInterface $scriptCode |
||
| 859 | * @param int $sigHashType |
||
| 860 | * @param int $sigVersion |
||
| 861 | * @return TransactionSignatureInterface |
||
| 862 | * @throws SignerException |
||
| 863 | */ |
||
| 864 | 88 | private function calculateSignature(PrivateKeyInterface $key, ScriptInterface $scriptCode, int $sigHashType, int $sigVersion) |
|
| 865 | { |
||
| 866 | 88 | $hash = $this->calculateSigHashUnsafe($scriptCode, $sigHashType, $sigVersion); |
|
| 867 | 88 | return new TransactionSignature($this->ecAdapter, $key->sign($hash), $sigHashType); |
|
| 868 | } |
||
| 869 | |||
| 870 | /** |
||
| 871 | * Returns whether all required signatures have been provided. |
||
| 872 | * |
||
| 873 | * @return bool |
||
| 874 | */ |
||
| 875 | 62 | public function isFullySigned(): bool |
|
| 876 | { |
||
| 877 | 62 | foreach ($this->steps as $step) { |
|
| 878 | 62 | if ($step instanceof Conditional) { |
|
| 879 | if (!$step->hasValue()) { |
||
| 880 | return false; |
||
| 881 | } |
||
| 882 | 62 | } else if ($step instanceof Checksig) { |
|
| 883 | 62 | if (!$step->isFullySigned()) { |
|
| 884 | 62 | return false; |
|
| 885 | } |
||
| 886 | } |
||
| 887 | } |
||
| 888 | |||
| 889 | 56 | return true; |
|
| 890 | } |
||
| 891 | |||
| 892 | /** |
||
| 893 | * Returns the required number of signatures for this input. |
||
| 894 | * |
||
| 895 | * @return int |
||
| 896 | */ |
||
| 897 | 62 | public function getRequiredSigs(): int |
|
| 898 | { |
||
| 899 | 62 | $count = 0; |
|
| 900 | 62 | foreach ($this->steps as $step) { |
|
| 901 | 62 | if ($step instanceof Checksig) { |
|
| 902 | 62 | $count += $step->getRequiredSigs(); |
|
| 903 | } |
||
| 904 | } |
||
| 905 | 62 | return $count; |
|
| 906 | } |
||
| 907 | |||
| 908 | /** |
||
| 909 | * Returns an array where the values are either null, |
||
| 910 | * or a TransactionSignatureInterface. |
||
| 911 | * |
||
| 912 | * @return TransactionSignatureInterface[] |
||
| 913 | */ |
||
| 914 | 62 | public function getSignatures(): array |
|
| 915 | { |
||
| 916 | 62 | return $this->steps[0]->getSignatures(); |
|
| 917 | } |
||
| 918 | |||
| 919 | /** |
||
| 920 | * Returns an array where the values are either null, |
||
| 921 | * or a PublicKeyInterface. |
||
| 922 | * |
||
| 923 | * @return PublicKeyInterface[] |
||
| 924 | */ |
||
| 925 | 51 | public function getPublicKeys(): array |
|
| 926 | { |
||
| 927 | 51 | return $this->steps[0]->getKeys(); |
|
| 928 | } |
||
| 929 | |||
| 930 | /** |
||
| 931 | * Returns a FullyQualifiedScript since we |
||
| 932 | * have solved all scripts to do with this input |
||
| 933 | * |
||
| 934 | * @return FullyQualifiedScript |
||
| 935 | */ |
||
| 936 | 50 | public function getInputScripts(): FullyQualifiedScript |
|
| 937 | { |
||
| 938 | 50 | return $this->fqs; |
|
| 939 | } |
||
| 940 | |||
| 941 | /** |
||
| 942 | * @param int $stepIdx |
||
| 943 | * @param PrivateKeyInterface $privateKey |
||
| 944 | * @param int $sigHashType |
||
| 945 | * @return $this |
||
| 946 | * @throws SignerException |
||
| 947 | */ |
||
| 948 | 94 | public function signStep(int $stepIdx, PrivateKeyInterface $privateKey, int $sigHashType = SigHash::ALL) |
|
| 949 | { |
||
| 950 | 94 | if (!array_key_exists($stepIdx, $this->steps)) { |
|
| 951 | throw new \RuntimeException("Unknown step index"); |
||
| 952 | } |
||
| 953 | |||
| 954 | 94 | $checksig = $this->steps[$stepIdx]; |
|
| 955 | 94 | if (!($checksig instanceof Checksig)) { |
|
| 956 | throw new \RuntimeException("That index is a conditional, so cannot be signed"); |
||
| 957 | } |
||
| 958 | |||
| 959 | 94 | if ($checksig->isFullySigned()) { |
|
| 960 | return $this; |
||
| 961 | } |
||
| 962 | |||
| 963 | 94 | if (SigHash::V1 === $this->fqs->sigVersion() && !$privateKey->isCompressed()) { |
|
| 964 | throw new \RuntimeException('Uncompressed keys are disallowed in segwit scripts - refusing to sign'); |
||
| 965 | } |
||
| 966 | |||
| 967 | 94 | $signScript = $this->fqs->signScript()->getScript(); |
|
| 968 | 94 | if ($checksig->getType() === ScriptType::P2PK) { |
|
| 969 | 35 | if (!$this->pubKeySerializer->serialize($privateKey->getPublicKey())->equals($checksig->getSolution())) { |
|
| 970 | 2 | throw new \RuntimeException('Signing with the wrong private key'); |
|
| 971 | } |
||
| 972 | |||
| 973 | 33 | if (!$checksig->hasSignature(0)) { |
|
| 974 | 33 | $signature = $this->calculateSignature($privateKey, $signScript, $sigHashType, $this->fqs->sigVersion()); |
|
| 975 | 33 | $checksig->setSignature(0, $signature); |
|
| 976 | } |
||
| 977 | 67 | } else if ($checksig->getType() === ScriptType::P2PKH) { |
|
| 978 | 36 | $publicKey = $privateKey->getPublicKey(); |
|
| 979 | 36 | if (!$publicKey->getPubKeyHash()->equals($checksig->getSolution())) { |
|
| 980 | 2 | throw new \RuntimeException('Signing with the wrong private key'); |
|
| 981 | } |
||
| 982 | |||
| 983 | 34 | if (!$checksig->hasSignature(0)) { |
|
| 984 | 34 | $signature = $this->calculateSignature($privateKey, $signScript, $sigHashType, $this->fqs->sigVersion()); |
|
| 985 | 34 | $checksig->setSignature(0, $signature); |
|
| 986 | } |
||
| 987 | |||
| 988 | 34 | if (!$checksig->hasKey(0)) { |
|
| 989 | 34 | $checksig->setKey(0, $publicKey); |
|
| 990 | } |
||
| 991 | 33 | } else if ($checksig->getType() === ScriptType::MULTISIG) { |
|
| 992 | 33 | $signed = false; |
|
| 993 | 33 | foreach ($checksig->getKeys() as $keyIdx => $publicKey) { |
|
| 994 | 33 | if (!$checksig->hasSignature($keyIdx)) { |
|
| 995 | 33 | if ($publicKey instanceof PublicKeyInterface && $privateKey->getPublicKey()->equals($publicKey)) { |
|
| 996 | 31 | $signature = $this->calculateSignature($privateKey, $signScript, $sigHashType, $this->fqs->sigVersion()); |
|
| 997 | 31 | $checksig->setSignature($keyIdx, $signature); |
|
| 998 | 33 | $signed = true; |
|
| 999 | } |
||
| 1000 | } |
||
| 1001 | } |
||
| 1002 | |||
| 1003 | 33 | if (!$signed) { |
|
| 1004 | 33 | throw new \RuntimeException('Signing with the wrong private key'); |
|
| 1005 | } |
||
| 1006 | } else { |
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| 1007 | throw new \RuntimeException('Unexpected error - sign script had an unexpected type'); |
||
| 1008 | } |
||
| 1009 | |||
| 1010 | 88 | return $this; |
|
| 1011 | } |
||
| 1012 | |||
| 1013 | /** |
||
| 1014 | * Sign the input using $key and $sigHashTypes |
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| 1015 | * |
||
| 1016 | * @param PrivateKeyInterface $privateKey |
||
| 1017 | * @param int $sigHashType |
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| 1018 | * @return $this |
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| 1019 | * @throws SignerException |
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| 1020 | */ |
||
| 1021 | 71 | public function sign(PrivateKeyInterface $privateKey, int $sigHashType = SigHash::ALL) |
|
| 1025 | |||
| 1026 | /** |
||
| 1027 | * Verifies the input using $flags for script verification |
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| 1028 | * |
||
| 1029 | * @param int $flags |
||
| 1030 | * @return bool |
||
| 1031 | */ |
||
| 1032 | 73 | public function verify(int $flags = null): bool |
|
| 1066 | |||
| 1067 | /** |
||
| 1068 | * @return Stack |
||
| 1069 | */ |
||
| 1070 | 88 | private function serializeSteps(): Stack |
|
| 1102 | |||
| 1103 | /** |
||
| 1104 | * Produces a SigValues instance containing the scriptSig & script witness |
||
| 1105 | * |
||
| 1106 | * @return SigValues |
||
| 1107 | */ |
||
| 1108 | 88 | public function serializeSignatures(): SigValues |
|
| 1112 | |||
| 1113 | /** |
||
| 1114 | * @return Checksig[]|Conditional[]|mixed |
||
| 1115 | */ |
||
| 1116 | 50 | public function getSteps() |
|
| 1120 | } |
||
| 1121 |
Loading history...
Our type inference engine has found a suspicous assignment of a value to a property. This check raises an issue when a value that can be of a given class or a super-class is assigned to a property that is type hinted more strictly.
Either this assignment is in error or an instanceof check should be added for that assignment.