InputSigner::extractFromValues() - Code Metrics - Inspection of "Segregated Witness" - Bit-Wasp/bitcoin-php - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — master (#239)

by thomas

created 2016-02-03 17:15 UTC

InputSigner::extractFromValues() C

↳ Parent: InputSigner

Complexity

Conditions	13
Paths	36

Size

Total Lines	53
Code Lines	32

Duplication

Lines	0
Ratio	0 %

Importance

Changes	1
Bugs	0	Features	0

Metric	Value
c	1
b	0
f	0
dl	0
loc	53
rs	6.3327
cc	13
eloc	32
nc	36
nop	4

How to fix Long Method Complexity

<?php

namespace BitWasp\Bitcoin\Transaction\Factory;

use BitWasp\Bitcoin\Crypto\EcAdapter\Adapter\EcAdapterInterface;
use BitWasp\Bitcoin\Crypto\EcAdapter\Key\PrivateKeyInterface;
use BitWasp\Bitcoin\Crypto\EcAdapter\Key\PublicKeyInterface;
use BitWasp\Bitcoin\Crypto\Hash;
use BitWasp\Bitcoin\Crypto\Random\Rfc6979;
use BitWasp\Bitcoin\Key\PublicKeyFactory;
use BitWasp\Bitcoin\Script\Classifier\OutputClassifier;
use BitWasp\Bitcoin\Script\Opcodes;
use BitWasp\Bitcoin\Script\Parser\Operation;
use BitWasp\Bitcoin\Script\Script;
use BitWasp\Bitcoin\Script\ScriptFactory;
use BitWasp\Bitcoin\Script\ScriptInfo\Multisig;
use BitWasp\Bitcoin\Script\ScriptInterface;
use BitWasp\Bitcoin\Script\ScriptWitness;
use BitWasp\Bitcoin\Signature\SignatureSort;
use BitWasp\Bitcoin\Signature\TransactionSignature;
use BitWasp\Bitcoin\Signature\TransactionSignatureFactory;
use BitWasp\Bitcoin\Signature\TransactionSignatureInterface;
use BitWasp\Bitcoin\Transaction\SignatureHash\Hasher;
use BitWasp\Bitcoin\Transaction\SignatureHash\SigHash;
use BitWasp\Bitcoin\Transaction\SignatureHash\V1Hasher;
use BitWasp\Bitcoin\Transaction\TransactionInterface;
use BitWasp\Bitcoin\Transaction\TransactionOutputInterface;
use BitWasp\Buffertools\BufferInterface;

class InputSigner
{
    /**
     * @var EcAdapterInterface
     */
    private $ecAdapter;

    /**
     * @var ScriptInterface $redeemScript
     */
    private $redeemScript;

    /**
     * @var ScriptInterface $witnessScript
     */
    private $witnessScript;

    /**
     * @var TransactionInterface
     */
    private $tx;

    /**
     * @var int
     */
    private $nInput;

    /**
     * @var PublicKeyInterface[]
     */
    private $publicKeys = [];

    /**
     * @var int
     */
    private $sigHashType;

    /**
     * @var TransactionSignatureInterface[]
     */
    private $signatures = [];

    /**
     * @var int
     */
    private $requiredSigs = 0;

    /**
     * TxInputSigning constructor.
     * @param EcAdapterInterface $ecAdapter
     * @param TransactionInterface $tx
     * @param int $nInput
     * @param TransactionOutputInterface $txOut
     * @param int $sigHashType
     */
    public function __construct(EcAdapterInterface $ecAdapter, TransactionInterface $tx, $nInput, TransactionOutputInterface $txOut, $sigHashType = SigHash::ALL)
    {
        $this->ecAdapter = $ecAdapter;
        $this->tx = $tx;
        $this->nInput = $nInput;
        $this->txOut = $txOut;
class MyClass { }

$x = new MyClass();
$x->foo = true;
        $this->sigHashType = $sigHashType;
        $this->publicKeys = [];
        $this->signatures = [];

        $this->extractSignatures();
    }

    /**
     * @param string $type
     * @param ScriptInterface $scriptCode
     * @param BufferInterface[] $stack
     * @param int $sigVersion
     * @return mixed
     */
    public function extractFromValues($type, ScriptInterface $scriptCode, array $stack, $sigVersion)
    {
        $size = count($stack);
        if ($type === OutputClassifier::PAYTOPUBKEYHASH) {
            $this->requiredSigs = 1;
            if ($size === 2) {
                $this->signatures = [TransactionSignatureFactory::fromHex($stack[0], $this->ecAdapter)];
function acceptsInteger($int) { }

$x = '123'; // string "123"

// Instead of
acceptsInteger($x);

// we recommend to use
acceptsInteger((integer) $x);
                $this->publicKeys = [PublicKeyFactory::fromHex($stack[1], $this->ecAdapter)];
function acceptsInteger($int) { }

$x = '123'; // string "123"

// Instead of
acceptsInteger($x);

// we recommend to use
acceptsInteger((integer) $x);
            }
        }

        if ($type === OutputClassifier::PAYTOPUBKEY) {
            $this->requiredSigs = 1;
            if ($size === 1) {
                $this->signatures = [TransactionSignatureFactory::fromHex($stack[0], $this->ecAdapter)];
function acceptsInteger($int) { }

$x = '123'; // string "123"

// Instead of
acceptsInteger($x);

// we recommend to use
acceptsInteger((integer) $x);
            }
        }

        if ($type === OutputClassifier::MULTISIG) {
            $info = new Multisig($scriptCode);
            $this->requiredSigs = $info->getRequiredSigCount();
            $this->publicKeys = $info->getKeys();

            if ($size > 1) {
                if ($sigVersion === 1) {
                    $hasher = new V1Hasher($this->tx, $this->txOut->getValue());
                } else {
                    $hasher = new Hasher($this->tx);
                }

                $sigSort = new SignatureSort($this->ecAdapter);
                $sigs = new \SplObjectStorage;

                foreach (array_slice($stack, 1, -1) as $item) {
                    $txSig = TransactionSignatureFactory::fromHex($item, $this->ecAdapter);
function acceptsInteger($int) { }

$x = '123'; // string "123"

// Instead of
acceptsInteger($x);

// we recommend to use
acceptsInteger((integer) $x);
                    $hash = $hasher->calculate($scriptCode, $this->nInput, $txSig->getHashType());
                    $linked = $sigSort->link([$txSig->getSignature()], $this->publicKeys, $hash);

                    foreach ($this->publicKeys as $key) {
                        if ($linked->contains($key)) {
                            $sigs[$key] = $txSig;
                        }
                    }
                }

                foreach ($this->publicKeys as $idx => $key) {
                    $this->signatures[$idx] = isset($sigs[$key]) ? $sigs[$key]->getBuffer() : null;
                }
            }
        }

        return $type;
    }

    /**
     * @return $this
     */
    public function extractSignatures()
    {
        $type = (new OutputClassifier($this->txOut->getScript()))->classify();
        $scriptPubKey = $this->txOut->getScript();
        $scriptSig = $this->tx->getInput($this->nInput)->getScript();

        if ($type === OutputClassifier::PAYTOPUBKEYHASH || $type === OutputClassifier::PAYTOPUBKEY || $type === OutputClassifier::MULTISIG) {
            $innerSig = array_map(function (Operation $o) {
                return $o->getData();
            }, $scriptSig->getScriptParser()->decode());

            $this->extractFromValues($type, $scriptPubKey, $innerSig, 0);
        }

        if ($type === OutputClassifier::PAYTOSCRIPTHASH) {
            $decodeSig = $scriptSig->getScriptParser()->decode();
            if (count($decodeSig) > 0) {
                $redeemScript = new Script(end($decodeSig)->getData());
                $p2shType = (new OutputClassifier($redeemScript))->classify();

                if (count($decodeSig) > 1) {
                    $decodeSig = array_slice($decodeSig, 0, -1);
                }

                $internalSig = [];
                foreach ($decodeSig as $operation) {
                    $internalSig[] = $operation->getData();
                }

                $this->redeemScript = $redeemScript;
                $this->extractFromValues($p2shType, $redeemScript, $internalSig, 0);

                $type = $p2shType;
            }
        }

        $witnesses = $this->tx->getWitnesses();
        if ($type === OutputClassifier::WITNESS_V0_KEYHASH) {
            $this->requiredSigs = 1;
            if (isset($witnesses[$this->nInput])) {
                $witness = $witnesses[$this->nInput];
                $this->signatures = [TransactionSignatureFactory::fromHex($witness[0], $this->ecAdapter)];
                $this->publicKeys = [PublicKeyFactory::fromHex($witness[1], $this->ecAdapter)];
            }

        } else if ($type === OutputClassifier::WITNESS_V0_SCRIPTHASH) {
            if (isset($witnesses[$this->nInput])) {
                $witness = $witnesses[$this->nInput];
                $witCount = count($witnesses[$this->nInput]);
                if ($witCount > 0) {
                    $witnessScript = new Script($witness[$witCount - 1]);
                    $vWitness = $witness->all();
                    if (count($vWitness) > 1) {
                        $vWitness = array_slice($witness->all(), 0, -1);
                    }

                    $witnessType = (new OutputClassifier($witnessScript))->classify();
                    $this->extractFromValues($witnessType, $witnessScript, $vWitness, 1);
                    $this->witnessScript = $witnessScript;
                }
            }
        }

        return $this;
    }

    /**
     * @param PrivateKeyInterface $key
     * @param ScriptInterface $scriptCode
     * @param int $sigVersion
     * @return TransactionSignature
     */
    public function calculateSignature(PrivateKeyInterface $key, ScriptInterface $scriptCode, $sigVersion)
    {
        if ($sigVersion == 1) {
            $hasher = new V1Hasher($this->tx, $this->txOut->getValue());
        } else {
            $hasher = new Hasher($this->tx);
        }

        $hash = $hasher->calculate($scriptCode, $this->nInput, $this->sigHashType);

        return new TransactionSignature(
            $this->ecAdapter,
            $this->ecAdapter->sign(
                $hash,
                $key,
                new Rfc6979(
                    $this->ecAdapter,
                    $key,
                    $hash,
                    'sha256'
                )
            ),
            $this->sigHashType
        );
    }

    /**
     * @return int
     */
    public function isFullySigned()
    {
        return $this->requiredSigs !== 0 && $this->requiredSigs === count($this->signatures);
    }

    /**
     * The function only returns true when $scriptPubKey could be classified
     *
     * @param PrivateKeyInterface $key
     * @param ScriptInterface $scriptPubKey
     * @param int $outputType
     * @param BufferInterface[] $results
     * @param int $sigVersion
     * @return bool
     */
    private function doSignature(PrivateKeyInterface $key, ScriptInterface $scriptPubKey, &$outputType, array &$results, $sigVersion = 0)
    {
        $return = [];
        $outputType = (new OutputClassifier($scriptPubKey))->classify($return);
        if ($outputType === OutputClassifier::UNKNOWN) {
            throw new \RuntimeException('Cannot sign unknown script type');
        }

        if ($outputType === OutputClassifier::PAYTOPUBKEY) {
            $publicKeyBuffer = $return;
            $results[] = $publicKeyBuffer;
            $this->requiredSigs = 1;
            $publicKey = PublicKeyFactory::fromHex($publicKeyBuffer);
function acceptsInteger($int) { }

$x = '123'; // string "123"

// Instead of
acceptsInteger($x);

// we recommend to use
acceptsInteger((integer) $x);

            if ($publicKey->getBinary() === $key->getPublicKey()->getBinary()) {
                $this->signatures[0] = $this->calculateSignature($key, $scriptPubKey, $sigVersion);
            }

            return true;
        }

        if ($outputType === OutputClassifier::PAYTOPUBKEYHASH) {
            /** @var BufferInterface $pubKeyHash */
            $pubKeyHash = $return;
            $results[] = $pubKeyHash;
            $this->requiredSigs = 1;
            if ($pubKeyHash->getBinary() === $key->getPublicKey()->getPubKeyHash()->getBinary()) {
                $this->signatures[0] = $this->calculateSignature($key, $scriptPubKey, $sigVersion);
                $this->publicKeys[0] = $key->getPublicKey();
            }

            return true;
        }

        if ($outputType === OutputClassifier::MULTISIG) {
            $info = new Multisig($scriptPubKey);

            foreach ($info->getKeys() as $publicKey) {
                $results[] = $publicKey->getBuffer();
            }

            $this->publicKeys = $info->getKeys();
            $this->requiredSigs = $info->getKeyCount();

            foreach ($this->publicKeys as $keyIdx => $publicKey) {
                if ($publicKey->getBinary() == $key->getPublicKey()->getBinary()) {
                    $this->signatures[$keyIdx] = $this->calculateSignature($key, $scriptPubKey, $sigVersion);
                } else {
                    return false;
                }
            }

            return true;
        }

        if ($outputType === OutputClassifier::PAYTOSCRIPTHASH) {
            /** @var BufferInterface $scriptHash */
            $scriptHash = $return;
            $results[] = $scriptHash;
            return true;
        }

        if ($outputType === OutputClassifier::WITNESS_V0_KEYHASH) {
            /** @var BufferInterface $pubKeyHash */
            $pubKeyHash = $return;
            $results[] = $pubKeyHash;
            $this->requiredSigs = 1;

            if ($pubKeyHash->getBinary() === $key->getPublicKey()->getPubKeyHash()->getBinary()) {
                $script = ScriptFactory::sequence([Opcodes::OP_DUP, Opcodes::OP_HASH160, $pubKeyHash, Opcodes::OP_EQUALVERIFY, Opcodes::OP_CHECKSIG]);
                $this->signatures[0] = $this->calculateSignature($key, $script, 1);
                $this->publicKeys[0] = $key->getPublicKey();
            }

            return true;
        }

        if ($outputType === OutputClassifier::WITNESS_V0_SCRIPTHASH) {
            /** @var BufferInterface $scriptHash */
            $scriptHash = $return;
            $results[] = $scriptHash;

            return true;
        }

        return false;
    }

    /**
     * @param PrivateKeyInterface $key
     * @param ScriptInterface|null $redeemScript
     * @param ScriptInterface|null $witnessScript
     * @return bool
     */
    public function sign(PrivateKeyInterface $key, ScriptInterface $redeemScript = null, ScriptInterface $witnessScript = null)
    {
        /** @var BufferInterface[] $return */
        $type = null;
        $return = [];
        $solved = $this->doSignature($key, $this->txOut->getScript(), $type, $return, 0);

        if ($solved && $type === OutputClassifier::PAYTOSCRIPTHASH) {
            $redeemScriptBuffer = $return[0];

            if (!$redeemScript instanceof ScriptInterface) {
                throw new \InvalidArgumentException('Must provide redeem script for P2SH');
            }

            if (!$redeemScript->getScriptHash()->getBinary() === $redeemScriptBuffer->getBinary()) {
                throw new \InvalidArgumentException("Incorrect redeem script - hash doesn't match");
            }

            $results = []; // ???
            $solved = $solved && $this->doSignature($key, $redeemScript, $type, $results, 0) && $type !== OutputClassifier::PAYTOSCRIPTHASH;
            if ($solved) {
                $this->redeemScript = $redeemScript;
            }
        }

        if ($solved && $type === OutputClassifier::WITNESS_V0_KEYHASH) {
            $pubKeyHash = $return[0];
            $witnessScript = ScriptFactory::sequence([Opcodes::OP_DUP, Opcodes::OP_HASH160, $pubKeyHash, Opcodes::OP_EQUALVERIFY, Opcodes::OP_CHECKSIG]);
            $subType = null;
            $subResults = [];
            $solved = $solved && $this->doSignature($key, $witnessScript, $subType, $subResults, 1);
        } else if ($solved && $type === OutputClassifier::WITNESS_V0_SCRIPTHASH) {
            $scriptHash = $return[0];

            if (!$witnessScript instanceof ScriptInterface) {
                throw new \InvalidArgumentException('Must provide witness script for witness v0 scripthash');
            }

            if (!Hash::sha256($witnessScript->getBuffer())->getBinary() === $scriptHash->getBinary()) {
                throw new \InvalidArgumentException("Incorrect witness script - hash doesn't match");
            }

            $subType = null;
            $subResults = [];

            $solved = $solved && $this->doSignature($key, $witnessScript, $subType, $subResults, 1)
                && $subType !== OutputClassifier::PAYTOSCRIPTHASH
                && $subType !== OutputClassifier::WITNESS_V0_SCRIPTHASH
                && $subType !== OutputClassifier::WITNESS_V0_KEYHASH;

            if ($solved) {
                $this->witnessScript = $witnessScript;
            }
        }

        return $solved;
    }

    /**
     * @param $outputType
     * @param $answer
     * @return bool
     */
    private function serializeSimpleSig($outputType, &$answer)
    {
        if ($outputType === OutputClassifier::UNKNOWN) {
            throw new \RuntimeException('Cannot sign unknown script type');
        }

        if ($outputType === OutputClassifier::PAYTOPUBKEY && $this->isFullySigned()) {
            $answer = new SigValues(ScriptFactory::sequence([$this->signatures[0]->getBuffer()]), new ScriptWitness([]));
            return true;
        }

        if ($outputType === OutputClassifier::PAYTOPUBKEYHASH && $this->isFullySigned()) {
            $answer = new SigValues(ScriptFactory::sequence([$this->signatures[0]->getBuffer(), $this->publicKeys[0]->getBuffer()]), new ScriptWitness([]));
            return true;
        }

        if ($outputType === OutputClassifier::MULTISIG) {
            $sequence = [Opcodes::OP_0];
            for ($i = 0; $i < $this->requiredSigs; $i++) {
                if (isset($this->signatures[$i])) {
                    $sequence[] =  $this->signatures[$i]->getBuffer();
                }
            }

            $answer = new SigValues(ScriptFactory::sequence($sequence), new ScriptWitness([]));
            return true;
        }

        return false;
    }

    /**
     * @return SigValues
     */
    public function serializeSignatures()
    {
        static $emptyScript = null;
        static $emptyWitness = null;
        if (is_null($emptyScript) || is_null($emptyWitness)) {
            $emptyScript = new Script();
            $emptyWitness = new ScriptWitness([]);
        }

        /** @var BufferInterface[] $return */
        $outputType = (new OutputClassifier($this->txOut->getScript()))->classify();

        /** @var SigValues $answer */
        $answer = new SigValues($emptyScript, $emptyWitness);
        $serialized = $this->serializeSimpleSig($outputType, $answer);

        $p2sh = false;
        if (!$serialized && $outputType === OutputClassifier::PAYTOSCRIPTHASH) {
            $p2sh = true;
            $outputType = (new OutputClassifier($this->redeemScript))->classify();
            $serialized = $this->serializeSimpleSig($outputType, $answer);
        }

        if (!$serialized && $outputType === OutputClassifier::WITNESS_V0_KEYHASH) {
            $answer = new SigValues($emptyScript, new ScriptWitness([$this->signatures[0]->getBuffer(), $this->publicKeys[0]->getBuffer()]));

        } else if (!$serialized && $outputType === OutputClassifier::WITNESS_V0_SCRIPTHASH) {
            $outputType = (new OutputClassifier($this->witnessScript))->classify();
            $serialized = $this->serializeSimpleSig($outputType, $answer);

            if ($serialized) {
                $data = [];
                foreach ($answer->getScriptSig()->getScriptParser()->decode() as $o) {
                    $data[] = $o->getData();
                }

                $data[] = $this->witnessScript->getBuffer();
                $answer = new SigValues($emptyScript, new ScriptWitness($data));
            }
        }

        if ($p2sh) {
            $answer = new SigValues(
                ScriptFactory::create($answer->getScriptSig()->getBuffer())->push($this->redeemScript->getBuffer())->getScript(),
                $answer->getScriptWitness()
            );
        }

        return $answer;
    }
}


1			<?php
2
3			namespace BitWasp\Bitcoin\Transaction\Factory;
4
5			use BitWasp\Bitcoin\Crypto\EcAdapter\Adapter\EcAdapterInterface;
6			use BitWasp\Bitcoin\Crypto\EcAdapter\Key\PrivateKeyInterface;
7			use BitWasp\Bitcoin\Crypto\EcAdapter\Key\PublicKeyInterface;
8			use BitWasp\Bitcoin\Crypto\Hash;
9			use BitWasp\Bitcoin\Crypto\Random\Rfc6979;
10			use BitWasp\Bitcoin\Key\PublicKeyFactory;
11			use BitWasp\Bitcoin\Script\Classifier\OutputClassifier;
12			use BitWasp\Bitcoin\Script\Opcodes;
13			use BitWasp\Bitcoin\Script\Parser\Operation;
14			use BitWasp\Bitcoin\Script\Script;
15			use BitWasp\Bitcoin\Script\ScriptFactory;
16			use BitWasp\Bitcoin\Script\ScriptInfo\Multisig;
17			use BitWasp\Bitcoin\Script\ScriptInterface;
18			use BitWasp\Bitcoin\Script\ScriptWitness;
19			use BitWasp\Bitcoin\Signature\SignatureSort;
20			use BitWasp\Bitcoin\Signature\TransactionSignature;
21			use BitWasp\Bitcoin\Signature\TransactionSignatureFactory;
22			use BitWasp\Bitcoin\Signature\TransactionSignatureInterface;
23			use BitWasp\Bitcoin\Transaction\SignatureHash\Hasher;
24			use BitWasp\Bitcoin\Transaction\SignatureHash\SigHash;
25			use BitWasp\Bitcoin\Transaction\SignatureHash\V1Hasher;
26			use BitWasp\Bitcoin\Transaction\TransactionInterface;
27			use BitWasp\Bitcoin\Transaction\TransactionOutputInterface;
28			use BitWasp\Buffertools\BufferInterface;
29
30			class InputSigner
31			{
32			/**
33			* @var EcAdapterInterface
34			*/
35			private $ecAdapter;
36
37			/**
38			* @var ScriptInterface $redeemScript
39			*/
40			private $redeemScript;
41
42			/**
43			* @var ScriptInterface $witnessScript
44			*/
45			private $witnessScript;
46
47			/**
48			* @var TransactionInterface
49			*/
50			private $tx;
51
52			/**
53			* @var int
54			*/
55			private $nInput;
56
57			/**
58			* @var PublicKeyInterface[]
59			*/
60			private $publicKeys = [];
61
62			/**
63			* @var int
64			*/
65			private $sigHashType;
66
67			/**
68			* @var TransactionSignatureInterface[]
69			*/
70			private $signatures = [];
71
72			/**
73			* @var int
74			*/
75			private $requiredSigs = 0;
76
77			/**
78			* TxInputSigning constructor.
79			* @param EcAdapterInterface $ecAdapter
80			* @param TransactionInterface $tx
81			* @param int $nInput
82			* @param TransactionOutputInterface $txOut
83			* @param int $sigHashType
84			*/
85			public function __construct(EcAdapterInterface $ecAdapter, TransactionInterface $tx, $nInput, TransactionOutputInterface $txOut, $sigHashType = SigHash::ALL)
86			{
87			$this->ecAdapter = $ecAdapter;
88			$this->tx = $tx;
89			$this->nInput = $nInput;
90			$this->txOut = $txOut;
			0 ignored issues – show Bug introduced 2016-02-03 03:56 UTC by Report Bug Copy Issue Report The property `txOut` does not exist. Did you maybe forget to declare it? In PHP it is possible to write to properties without declaring them. For example, the following is perfectly valid PHP code: class MyClass { } $x = new MyClass(); $x->foo = true; Generally, it is a good practice to explictly declare properties to avoid accidental typos and provide IDE auto-completion: class MyClass { public $foo; } $x = new MyClass(); $x->foo = true; Loading history...
91			$this->sigHashType = $sigHashType;
92			$this->publicKeys = [];
93			$this->signatures = [];
94
95			$this->extractSignatures();
96			}
97
98			/**
99			* @param string $type
100			* @param ScriptInterface $scriptCode
101			* @param BufferInterface[] $stack
102			* @param int $sigVersion
103			* @return mixed
104			*/
105			public function extractFromValues($type, ScriptInterface $scriptCode, array $stack, $sigVersion)
106			{
107			$size = count($stack);
108			if ($type === OutputClassifier::PAYTOPUBKEYHASH) {
109			$this->requiredSigs = 1;
110			if ($size === 2) {
111			$this->signatures = [TransactionSignatureFactory::fromHex($stack[0], $this->ecAdapter)];
			0 ignored issues – show Documentation introduced 2016-02-03 03:56 UTC by Report Bug Copy Issue Report `$stack[0]` is of type `object<BitWasp\Buffertools\BufferInterface>`, but the function expects a `object<BitWasp\Buffertools\Buffer>\|string`. It seems like the type of the argument is not accepted by the function/method which you are calling. In some cases, in particular if PHP’s automatic type-juggling kicks in this might be fine. In other cases, however this might be a bug. We suggest to add an explicit type cast like in the following example: function acceptsInteger($int) { } $x = '123'; // string "123" // Instead of acceptsInteger($x); // we recommend to use acceptsInteger((integer) $x); Loading history...
112			$this->publicKeys = [PublicKeyFactory::fromHex($stack[1], $this->ecAdapter)];
			0 ignored issues – show Documentation introduced 2016-02-03 03:56 UTC by Report Bug Copy Issue Report `$stack[1]` is of type `object<BitWasp\Buffertools\BufferInterface>`, but the function expects a `object<BitWasp\Buffertools\Buffer>\|string`. It seems like the type of the argument is not accepted by the function/method which you are calling. In some cases, in particular if PHP’s automatic type-juggling kicks in this might be fine. In other cases, however this might be a bug. We suggest to add an explicit type cast like in the following example: function acceptsInteger($int) { } $x = '123'; // string "123" // Instead of acceptsInteger($x); // we recommend to use acceptsInteger((integer) $x); Loading history...
113			}
114			}
115
116			if ($type === OutputClassifier::PAYTOPUBKEY) {
117			$this->requiredSigs = 1;
118			if ($size === 1) {
119			$this->signatures = [TransactionSignatureFactory::fromHex($stack[0], $this->ecAdapter)];
			0 ignored issues – show Documentation introduced 2016-02-03 03:56 UTC by Report Bug Copy Issue Report `$stack[0]` is of type `object<BitWasp\Buffertools\BufferInterface>`, but the function expects a `object<BitWasp\Buffertools\Buffer>\|string`. It seems like the type of the argument is not accepted by the function/method which you are calling. In some cases, in particular if PHP’s automatic type-juggling kicks in this might be fine. In other cases, however this might be a bug. We suggest to add an explicit type cast like in the following example: function acceptsInteger($int) { } $x = '123'; // string "123" // Instead of acceptsInteger($x); // we recommend to use acceptsInteger((integer) $x); Loading history...
120			}
121			}
122
123			if ($type === OutputClassifier::MULTISIG) {
124			$info = new Multisig($scriptCode);
125			$this->requiredSigs = $info->getRequiredSigCount();
126			$this->publicKeys = $info->getKeys();
127
128			if ($size > 1) {
129			if ($sigVersion === 1) {
130			$hasher = new V1Hasher($this->tx, $this->txOut->getValue());
131			} else {
132			$hasher = new Hasher($this->tx);
133			}
134
135			$sigSort = new SignatureSort($this->ecAdapter);
136			$sigs = new \SplObjectStorage;
137
138			foreach (array_slice($stack, 1, -1) as $item) {
139			$txSig = TransactionSignatureFactory::fromHex($item, $this->ecAdapter);
			0 ignored issues – show Documentation introduced 2016-02-03 03:56 UTC by Report Bug Copy Issue Report `$item` is of type `object<BitWasp\Buffertools\BufferInterface>`, but the function expects a `object<BitWasp\Buffertools\Buffer>\|string`. It seems like the type of the argument is not accepted by the function/method which you are calling. In some cases, in particular if PHP’s automatic type-juggling kicks in this might be fine. In other cases, however this might be a bug. We suggest to add an explicit type cast like in the following example: function acceptsInteger($int) { } $x = '123'; // string "123" // Instead of acceptsInteger($x); // we recommend to use acceptsInteger((integer) $x); Loading history...
140			$hash = $hasher->calculate($scriptCode, $this->nInput, $txSig->getHashType());
141			$linked = $sigSort->link([$txSig->getSignature()], $this->publicKeys, $hash);
142
143			foreach ($this->publicKeys as $key) {
144			if ($linked->contains($key)) {
145			$sigs[$key] = $txSig;
146			}
147			}
148			}
149
150			foreach ($this->publicKeys as $idx => $key) {
151			$this->signatures[$idx] = isset($sigs[$key]) ? $sigs[$key]->getBuffer() : null;
152			}
153			}
154			}
155
156			return $type;
157			}
158
159			/**
160			* @return $this
161			*/
162			public function extractSignatures()
163			{
164			$type = (new OutputClassifier($this->txOut->getScript()))->classify();
165			$scriptPubKey = $this->txOut->getScript();
166			$scriptSig = $this->tx->getInput($this->nInput)->getScript();
167
168			if ($type === OutputClassifier::PAYTOPUBKEYHASH \|\| $type === OutputClassifier::PAYTOPUBKEY \|\| $type === OutputClassifier::MULTISIG) {
169			$innerSig = array_map(function (Operation $o) {
170			return $o->getData();
171			}, $scriptSig->getScriptParser()->decode());
172
173			$this->extractFromValues($type, $scriptPubKey, $innerSig, 0);
174			}
175
176			if ($type === OutputClassifier::PAYTOSCRIPTHASH) {
177			$decodeSig = $scriptSig->getScriptParser()->decode();
178			if (count($decodeSig) > 0) {
179			$redeemScript = new Script(end($decodeSig)->getData());
180			$p2shType = (new OutputClassifier($redeemScript))->classify();
181
182			if (count($decodeSig) > 1) {
183			$decodeSig = array_slice($decodeSig, 0, -1);
184			}
185
186			$internalSig = [];
187			foreach ($decodeSig as $operation) {
188			$internalSig[] = $operation->getData();
189			}
190
191			$this->redeemScript = $redeemScript;
192			$this->extractFromValues($p2shType, $redeemScript, $internalSig, 0);
193
194			$type = $p2shType;
195			}
196			}
197
198			$witnesses = $this->tx->getWitnesses();
199			if ($type === OutputClassifier::WITNESS_V0_KEYHASH) {
200			$this->requiredSigs = 1;
201			if (isset($witnesses[$this->nInput])) {
202			$witness = $witnesses[$this->nInput];
203			$this->signatures = [TransactionSignatureFactory::fromHex($witness[0], $this->ecAdapter)];
204			$this->publicKeys = [PublicKeyFactory::fromHex($witness[1], $this->ecAdapter)];
205			}
206
207			} else if ($type === OutputClassifier::WITNESS_V0_SCRIPTHASH) {
208			if (isset($witnesses[$this->nInput])) {
209			$witness = $witnesses[$this->nInput];
210			$witCount = count($witnesses[$this->nInput]);
211			if ($witCount > 0) {
212			$witnessScript = new Script($witness[$witCount - 1]);
213			$vWitness = $witness->all();
214			if (count($vWitness) > 1) {
215			$vWitness = array_slice($witness->all(), 0, -1);
216			}
217
218			$witnessType = (new OutputClassifier($witnessScript))->classify();
219			$this->extractFromValues($witnessType, $witnessScript, $vWitness, 1);
220			$this->witnessScript = $witnessScript;
221			}
222			}
223			}
224
225			return $this;
226			}
227
228			/**
229			* @param PrivateKeyInterface $key
230			* @param ScriptInterface $scriptCode
231			* @param int $sigVersion
232			* @return TransactionSignature
233			*/
234			public function calculateSignature(PrivateKeyInterface $key, ScriptInterface $scriptCode, $sigVersion)
235			{
236			if ($sigVersion == 1) {
237			$hasher = new V1Hasher($this->tx, $this->txOut->getValue());
238			} else {
239			$hasher = new Hasher($this->tx);
240			}
241
242			$hash = $hasher->calculate($scriptCode, $this->nInput, $this->sigHashType);
243
244			return new TransactionSignature(
245			$this->ecAdapter,
246			$this->ecAdapter->sign(
247			$hash,
248			$key,
249			new Rfc6979(
250			$this->ecAdapter,
251			$key,
252			$hash,
253			'sha256'
254			)
255			),
256			$this->sigHashType
257			);
258			}
259
260			/**
261			* @return int
262			*/
263			public function isFullySigned()
264			{
265			return $this->requiredSigs !== 0 && $this->requiredSigs === count($this->signatures);
266			}
267
268			/**
269			* The function only returns true when $scriptPubKey could be classified
270			*
271			* @param PrivateKeyInterface $key
272			* @param ScriptInterface $scriptPubKey
273			* @param int $outputType
274			* @param BufferInterface[] $results
275			* @param int $sigVersion
276			* @return bool
277			*/
278			private function doSignature(PrivateKeyInterface $key, ScriptInterface $scriptPubKey, &$outputType, array &$results, $sigVersion = 0)
279			{
280			$return = [];
281			$outputType = (new OutputClassifier($scriptPubKey))->classify($return);
282			if ($outputType === OutputClassifier::UNKNOWN) {
283			throw new \RuntimeException('Cannot sign unknown script type');
284			}
285
286			if ($outputType === OutputClassifier::PAYTOPUBKEY) {
287			$publicKeyBuffer = $return;
288			$results[] = $publicKeyBuffer;
289			$this->requiredSigs = 1;
290			$publicKey = PublicKeyFactory::fromHex($publicKeyBuffer);
			0 ignored issues – show Documentation introduced 2016-02-03 03:56 UTC by Report Bug Copy Issue Report `$publicKeyBuffer` is of type `object<BitWasp\Buffertoo...\BufferInterface>>\|null`, but the function expects a `object<BitWasp\Buffertools\Buffer>\|string`. It seems like the type of the argument is not accepted by the function/method which you are calling. In some cases, in particular if PHP’s automatic type-juggling kicks in this might be fine. In other cases, however this might be a bug. We suggest to add an explicit type cast like in the following example: function acceptsInteger($int) { } $x = '123'; // string "123" // Instead of acceptsInteger($x); // we recommend to use acceptsInteger((integer) $x); Loading history...
291
292			if ($publicKey->getBinary() === $key->getPublicKey()->getBinary()) {
293			$this->signatures[0] = $this->calculateSignature($key, $scriptPubKey, $sigVersion);
294			}
295
296			return true;
297			}
298
299			if ($outputType === OutputClassifier::PAYTOPUBKEYHASH) {
300			/** @var BufferInterface $pubKeyHash */
301			$pubKeyHash = $return;
302			$results[] = $pubKeyHash;
303			$this->requiredSigs = 1;
304			if ($pubKeyHash->getBinary() === $key->getPublicKey()->getPubKeyHash()->getBinary()) {
305			$this->signatures[0] = $this->calculateSignature($key, $scriptPubKey, $sigVersion);
306			$this->publicKeys[0] = $key->getPublicKey();
307			}
308
309			return true;
310			}
311
312			if ($outputType === OutputClassifier::MULTISIG) {
313			$info = new Multisig($scriptPubKey);
314
315			foreach ($info->getKeys() as $publicKey) {
316			$results[] = $publicKey->getBuffer();
317			}
318
319			$this->publicKeys = $info->getKeys();
320			$this->requiredSigs = $info->getKeyCount();
321
322			foreach ($this->publicKeys as $keyIdx => $publicKey) {
323			if ($publicKey->getBinary() == $key->getPublicKey()->getBinary()) {
324			$this->signatures[$keyIdx] = $this->calculateSignature($key, $scriptPubKey, $sigVersion);
325			} else {
326			return false;
327			}
328			}
329
330			return true;
331			}
332
333			if ($outputType === OutputClassifier::PAYTOSCRIPTHASH) {
334			/** @var BufferInterface $scriptHash */
335			$scriptHash = $return;
336			$results[] = $scriptHash;
337			return true;
338			}
339
340			if ($outputType === OutputClassifier::WITNESS_V0_KEYHASH) {
341			/** @var BufferInterface $pubKeyHash */
342			$pubKeyHash = $return;
343			$results[] = $pubKeyHash;
344			$this->requiredSigs = 1;
345
346			if ($pubKeyHash->getBinary() === $key->getPublicKey()->getPubKeyHash()->getBinary()) {
347			$script = ScriptFactory::sequence([Opcodes::OP_DUP, Opcodes::OP_HASH160, $pubKeyHash, Opcodes::OP_EQUALVERIFY, Opcodes::OP_CHECKSIG]);
348			$this->signatures[0] = $this->calculateSignature($key, $script, 1);
349			$this->publicKeys[0] = $key->getPublicKey();
350			}
351
352			return true;
353			}
354
355			if ($outputType === OutputClassifier::WITNESS_V0_SCRIPTHASH) {
356			/** @var BufferInterface $scriptHash */
357			$scriptHash = $return;
358			$results[] = $scriptHash;
359
360			return true;
361			}
362
363			return false;
364			}
365
366			/**
367			* @param PrivateKeyInterface $key
368			* @param ScriptInterface\|null $redeemScript
369			* @param ScriptInterface\|null $witnessScript
370			* @return bool
371			*/
372			public function sign(PrivateKeyInterface $key, ScriptInterface $redeemScript = null, ScriptInterface $witnessScript = null)
373			{
374			/** @var BufferInterface[] $return */
375			$type = null;
376			$return = [];
377			$solved = $this->doSignature($key, $this->txOut->getScript(), $type, $return, 0);
378
379			if ($solved && $type === OutputClassifier::PAYTOSCRIPTHASH) {
380			$redeemScriptBuffer = $return[0];
381
382			if (!$redeemScript instanceof ScriptInterface) {
383			throw new \InvalidArgumentException('Must provide redeem script for P2SH');
384			}
385
386			if (!$redeemScript->getScriptHash()->getBinary() === $redeemScriptBuffer->getBinary()) {
387			throw new \InvalidArgumentException("Incorrect redeem script - hash doesn't match");
388			}
389
390			$results = []; // ???
391			$solved = $solved && $this->doSignature($key, $redeemScript, $type, $results, 0) && $type !== OutputClassifier::PAYTOSCRIPTHASH;
392			if ($solved) {
393			$this->redeemScript = $redeemScript;
394			}
395			}
396
397			if ($solved && $type === OutputClassifier::WITNESS_V0_KEYHASH) {
398			$pubKeyHash = $return[0];
399			$witnessScript = ScriptFactory::sequence([Opcodes::OP_DUP, Opcodes::OP_HASH160, $pubKeyHash, Opcodes::OP_EQUALVERIFY, Opcodes::OP_CHECKSIG]);
400			$subType = null;
401			$subResults = [];
402			$solved = $solved && $this->doSignature($key, $witnessScript, $subType, $subResults, 1);
403			} else if ($solved && $type === OutputClassifier::WITNESS_V0_SCRIPTHASH) {
404			$scriptHash = $return[0];
405
406			if (!$witnessScript instanceof ScriptInterface) {
407			throw new \InvalidArgumentException('Must provide witness script for witness v0 scripthash');
408			}
409
410			if (!Hash::sha256($witnessScript->getBuffer())->getBinary() === $scriptHash->getBinary()) {
411			throw new \InvalidArgumentException("Incorrect witness script - hash doesn't match");
412			}
413
414			$subType = null;
415			$subResults = [];
416
417			$solved = $solved && $this->doSignature($key, $witnessScript, $subType, $subResults, 1)
418			&& $subType !== OutputClassifier::PAYTOSCRIPTHASH
419			&& $subType !== OutputClassifier::WITNESS_V0_SCRIPTHASH
420			&& $subType !== OutputClassifier::WITNESS_V0_KEYHASH;
421
422			if ($solved) {
423			$this->witnessScript = $witnessScript;
424			}
425			}
426
427			return $solved;
428			}
429
430			/**
431			* @param $outputType
432			* @param $answer
433			* @return bool
434			*/
435			private function serializeSimpleSig($outputType, &$answer)
436			{
437			if ($outputType === OutputClassifier::UNKNOWN) {
438			throw new \RuntimeException('Cannot sign unknown script type');
439			}
440
441			if ($outputType === OutputClassifier::PAYTOPUBKEY && $this->isFullySigned()) {
442			$answer = new SigValues(ScriptFactory::sequence([$this->signatures[0]->getBuffer()]), new ScriptWitness([]));
443			return true;
444			}
445
446			if ($outputType === OutputClassifier::PAYTOPUBKEYHASH && $this->isFullySigned()) {
447			$answer = new SigValues(ScriptFactory::sequence([$this->signatures[0]->getBuffer(), $this->publicKeys[0]->getBuffer()]), new ScriptWitness([]));
448			return true;
449			}
450
451			if ($outputType === OutputClassifier::MULTISIG) {
452			$sequence = [Opcodes::OP_0];
453			for ($i = 0; $i < $this->requiredSigs; $i++) {
454			if (isset($this->signatures[$i])) {
455			$sequence[] = $this->signatures[$i]->getBuffer();
456			}
457			}
458
459			$answer = new SigValues(ScriptFactory::sequence($sequence), new ScriptWitness([]));
460			return true;
461			}
462
463			return false;
464			}
465
466			/**
467			* @return SigValues
468			*/
469			public function serializeSignatures()
470			{
471			static $emptyScript = null;
472			static $emptyWitness = null;
473			if (is_null($emptyScript) \|\| is_null($emptyWitness)) {
474			$emptyScript = new Script();
475			$emptyWitness = new ScriptWitness([]);
476			}
477
478			/** @var BufferInterface[] $return */
479			$outputType = (new OutputClassifier($this->txOut->getScript()))->classify();
480
481			/** @var SigValues $answer */
482			$answer = new SigValues($emptyScript, $emptyWitness);
483			$serialized = $this->serializeSimpleSig($outputType, $answer);
484
485			$p2sh = false;
486			if (!$serialized && $outputType === OutputClassifier::PAYTOSCRIPTHASH) {
487			$p2sh = true;
488			$outputType = (new OutputClassifier($this->redeemScript))->classify();
489			$serialized = $this->serializeSimpleSig($outputType, $answer);
490			}
491
492			if (!$serialized && $outputType === OutputClassifier::WITNESS_V0_KEYHASH) {
493			$answer = new SigValues($emptyScript, new ScriptWitness([$this->signatures[0]->getBuffer(), $this->publicKeys[0]->getBuffer()]));
494
495			} else if (!$serialized && $outputType === OutputClassifier::WITNESS_V0_SCRIPTHASH) {
496			$outputType = (new OutputClassifier($this->witnessScript))->classify();
497			$serialized = $this->serializeSimpleSig($outputType, $answer);
498
499			if ($serialized) {
500			$data = [];
501			foreach ($answer->getScriptSig()->getScriptParser()->decode() as $o) {
502			$data[] = $o->getData();
503			}
504
505			$data[] = $this->witnessScript->getBuffer();
506			$answer = new SigValues($emptyScript, new ScriptWitness($data));
507			}
508			}
509
510			if ($p2sh) {
511			$answer = new SigValues(
512			ScriptFactory::create($answer->getScriptSig()->getBuffer())->push($this->redeemScript->getBuffer())->getScript(),
513			$answer->getScriptWitness()
514			);
515			}
516
517			return $answer;
518			}
519			}
520

Bit-Wasp / bitcoin-php

Pull Request — master (#239)

InputSigner::extractFromValues() C

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Duplication

Importance

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