InputSigner::extractFromValues() - Code Metrics - Inspection of "InputSigner: should allow different sigHashType pe..." - Bit-Wasp/bitcoin-php - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — master (#384)

by thomas

created 2016-11-09 21:34 UTC

InputSigner::extractFromValues() D

↳ Parent: InputSigner

Complexity

Conditions	10
Paths	27

Size

Total Lines	39
Code Lines	23

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	30
CRAP Score	10.0033

Importance

Changes

Metric	Value
cc	10
eloc	23
c	0
b	0
f	0
nc	27
nop	4
dl	0
loc	39
ccs	30
cts	31
cp	0.9677
crap	10.0033
rs	4.8196

How to fix 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\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\SigHashInterface;
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 TransactionOutputInterface
     */
    private $txOut;

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

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

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

    /**
     * @var OutputClassifier
     */
    private $classifier;

    /**
     * TxInputSigning constructor.
     * @param EcAdapterInterface $ecAdapter
     * @param TransactionInterface $tx
     * @param int $nInput
     * @param TransactionOutputInterface $txOut
     */
    public function __construct(EcAdapterInterface $ecAdapter, TransactionInterface $tx, $nInput, TransactionOutputInterface $txOut)
    {
        $this->ecAdapter = $ecAdapter;
        $this->tx = $tx;
        $this->nInput = $nInput;
        $this->txOut = $txOut;
        $this->classifier = new OutputClassifier();
        $this->publicKeys = [];
        $this->signatures = [];

        $this->extractSignatures();
    }

    /**
     * @param int $sigVersion
     * @param TransactionSignatureInterface[] $stack
     * @param ScriptInterface $scriptCode
     * @return \SplObjectStorage
     */
    private function sortMultiSigs($sigVersion, $stack, ScriptInterface $scriptCode)
    {
        if ($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 ($stack as $txSig) {
            $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;
                }
            }
        }

        return $sigs;
    }

    /**
     * @param string $type
     * @param ScriptInterface $scriptCode
     * @param BufferInterface[] $stack
     * @param int $sigVersion
     * @return string
     */
    public function extractFromValues($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)];
                $this->publicKeys = [PublicKeyFactory::fromHex($stack[1], $this->ecAdapter)];
            }
        }

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

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

            if ($size > 1) {
                $vars = [];
                foreach (array_slice($stack, 1, -1) as $sig) {
                    $vars[] = TransactionSignatureFactory::fromHex($sig, $this->ecAdapter);
                }

                $sigs = $this->sortMultiSigs($sigVersion, $vars, $scriptCode);

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

        return $type;
    }

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

        if ($type === OutputClassifier::PAYTOPUBKEYHASH || $type === OutputClassifier::PAYTOPUBKEY || $type === OutputClassifier::MULTISIG) {
            $values = [];
            foreach ($scriptSig->getScriptParser()->decode() as $o) {
                $values[] = $o->getData();
            }

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

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

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

        return $this;
    }

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

        return $hasher->calculate($scriptCode, $this->nInput, $sigHashType);
    }

    /**
     * @param PrivateKeyInterface $key
     * @param ScriptInterface $scriptCode
     * @param int $sigHashType
     * @param int $sigVersion
     * @return TransactionSignature
     */
    public function calculateSignature(PrivateKeyInterface $key, ScriptInterface $scriptCode, $sigHashType, $sigVersion)
    {
        $hash = $this->calculateSigHash($scriptCode, $sigHashType, $sigVersion);
        return new TransactionSignature(
            $this->ecAdapter,
            $this->ecAdapter->sign(
                $hash,
                $key,
                new Rfc6979(
                    $this->ecAdapter,
                    $key,
                    $hash,
                    'sha256'
                )
            ),
            $sigHashType
        );
    }

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

        if ($outputType === OutputClassifier::PAYTOPUBKEY) {
            /** @var BufferInterface $return */
            $results[] = $return;
            $this->requiredSigs = 1;
            if ($key->getPublicKey()->getBuffer()->equals($return)) {
function acceptsInteger($int) { }

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

// Instead of
acceptsInteger($x);

// we recommend to use
acceptsInteger((integer) $x);
                $this->signatures[0] = $this->calculateSignature($key, $scriptPubKey, $sigHashType, $sigVersion);
            }

            return true;
        }

        if ($outputType === OutputClassifier::PAYTOPUBKEYHASH) {
            /** @var BufferInterface $return */
            $results[] = $return;
            $this->requiredSigs = 1;
            if ($key->getPublicKey()->getPubKeyHash()->equals($return)) {
function acceptsInteger($int) { }

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

// Instead of
acceptsInteger($x);

// we recommend to use
acceptsInteger((integer) $x);
                $this->signatures[0] = $this->calculateSignature($key, $scriptPubKey, $sigHashType, $sigVersion);
                $this->publicKeys[0] = $key->getPublicKey();
            }

            return true;
        }

        if ($outputType === OutputClassifier::MULTISIG) {
            $info = new Multisig($scriptPubKey);
            $this->publicKeys = $info->getKeys();
            $this->requiredSigs = $info->getKeyCount();

            $myKey = $key->getPublicKey()->getBuffer();
            foreach ($info->getKeys() as $keyIdx => $publicKey) {
                $results[] = $publicKey->getBuffer();
                if ($publicKey->getBuffer()->equals($myKey)) {
function acceptsInteger($int) { }

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

// Instead of
acceptsInteger($x);

// we recommend to use
acceptsInteger((integer) $x);
                    $this->signatures[$keyIdx] = $this->calculateSignature($key, $scriptPubKey, $sigHashType, $sigVersion);
                }
            }

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

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

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

            if (!$redeemScript->getScriptHash()->equals($redeemScriptBuffer)) {
function acceptsInteger($int) { }

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

// Instead of
acceptsInteger($x);

// we recommend to use
acceptsInteger((integer) $x);
                throw new \InvalidArgumentException("Incorrect redeem script - hash doesn't match");
            }

            $results = []; // ???
            $solved = $solved && $this->doSignature($key, $redeemScript, $type, $results, $sigHashType, 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, $sigHashType, 1);
        } else if ($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, $sigHashType, 1)
                && $subType !== OutputClassifier::PAYTOSCRIPTHASH
                && $subType !== OutputClassifier::WITNESS_V0_SCRIPTHASH
                && $subType !== OutputClassifier::WITNESS_V0_KEYHASH;

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

        return $solved;
    }

    /**
     * @param string $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];
            $nPubKeys = count($this->publicKeys);
            for ($i = 0; $i < $nPubKeys; $i++) {
                if (isset($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 = $this->classifier->classify($this->txOut->getScript());

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

        $p2sh = false;
        if (!$serialized && $outputType === OutputClassifier::PAYTOSCRIPTHASH) {
            $p2sh = true;
            $outputType = $this->classifier->classify($this->redeemScript);
            $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 = $this->classifier->classify($this->witnessScript);
            $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\Script;
14		use BitWasp\Bitcoin\Script\ScriptFactory;
15		use BitWasp\Bitcoin\Script\ScriptInfo\Multisig;
16		use BitWasp\Bitcoin\Script\ScriptInterface;
17		use BitWasp\Bitcoin\Script\ScriptWitness;
18		use BitWasp\Bitcoin\Signature\SignatureSort;
19		use BitWasp\Bitcoin\Signature\TransactionSignature;
20		use BitWasp\Bitcoin\Signature\TransactionSignatureFactory;
21		use BitWasp\Bitcoin\Signature\TransactionSignatureInterface;
22		use BitWasp\Bitcoin\Transaction\SignatureHash\Hasher;
23		use BitWasp\Bitcoin\Transaction\SignatureHash\SigHashInterface;
24		use BitWasp\Bitcoin\Transaction\SignatureHash\V1Hasher;
25		use BitWasp\Bitcoin\Transaction\TransactionInterface;
26		use BitWasp\Bitcoin\Transaction\TransactionOutputInterface;
27		use BitWasp\Buffertools\BufferInterface;
28
29		class InputSigner
30		{
31		/**
32		* @var EcAdapterInterface
33		*/
34		private $ecAdapter;
35
36		/**
37		* @var ScriptInterface $redeemScript
38		*/
39		private $redeemScript;
40
41		/**
42		* @var ScriptInterface $witnessScript
43		*/
44		private $witnessScript;
45
46		/**
47		* @var TransactionInterface
48		*/
49		private $tx;
50
51		/**
52		* @var int
53		*/
54		private $nInput;
55
56		/**
57		* @var TransactionOutputInterface
58		*/
59		private $txOut;
60
61		/**
62		* @var PublicKeyInterface[]
63		*/
64		private $publicKeys = [];
65
66		/**
67		* @var TransactionSignatureInterface[]
68		*/
69		private $signatures = [];
70
71		/**
72		* @var int
73		*/
74		private $requiredSigs = 0;
75
76		/**
77		* @var OutputClassifier
78		*/
79		private $classifier;
80
81		/**
82		* TxInputSigning constructor.
83		* @param EcAdapterInterface $ecAdapter
84		* @param TransactionInterface $tx
85		* @param int $nInput
86		* @param TransactionOutputInterface $txOut
87		*/
88	84	public function __construct(EcAdapterInterface $ecAdapter, TransactionInterface $tx, $nInput, TransactionOutputInterface $txOut)
89		{
90	84	$this->ecAdapter = $ecAdapter;
91	84	$this->tx = $tx;
92	84	$this->nInput = $nInput;
93	84	$this->txOut = $txOut;
94	84	$this->classifier = new OutputClassifier();
95	84	$this->publicKeys = [];
96	84	$this->signatures = [];
97
98	84	$this->extractSignatures();
99	84	}
100
101		/**
102		* @param int $sigVersion
103		* @param TransactionSignatureInterface[] $stack
104		* @param ScriptInterface $scriptCode
105		* @return \SplObjectStorage
106		*/
107	24	private function sortMultiSigs($sigVersion, $stack, ScriptInterface $scriptCode)
108		{
109	24	if ($sigVersion === 1) {
110	12	$hasher = new V1Hasher($this->tx, $this->txOut->getValue());
111	8	} else {
112	12	$hasher = new Hasher($this->tx);
113		}
114
115	24	$sigSort = new SignatureSort($this->ecAdapter);
116	24	$sigs = new \SplObjectStorage;
117
118	24	foreach ($stack as $txSig) {
119		$hash = $hasher->calculate($scriptCode, $this->nInput, $txSig->getHashType());
120		$linked = $sigSort->link([$txSig->getSignature()], $this->publicKeys, $hash);
121
122		foreach ($this->publicKeys as $key) {
123		if ($linked->contains($key)) {
124		$sigs[$key] = $txSig;
125		}
126		}
127	16	}
128
129	24	return $sigs;
130		}
131
132		/**
133		* @param string $type
134		* @param ScriptInterface $scriptCode
135		* @param BufferInterface[] $stack
136		* @param int $sigVersion
137		* @return string
138		*/
139	72	public function extractFromValues($type, ScriptInterface $scriptCode, array $stack, $sigVersion)
140		{
141	72	$size = count($stack);
142	72	if ($type === OutputClassifier::PAYTOPUBKEYHASH) {
143	30	$this->requiredSigs = 1;
144	30	if ($size === 2) {
145	12	$this->signatures = [TransactionSignatureFactory::fromHex($stack[0], $this->ecAdapter)];
146	12	$this->publicKeys = [PublicKeyFactory::fromHex($stack[1], $this->ecAdapter)];
147	8	}
148	20	}
149
150	72	if ($type === OutputClassifier::PAYTOPUBKEY) {
151	12	$this->requiredSigs = 1;
152	12	if ($size === 1) {
153	6	$this->signatures = [TransactionSignatureFactory::fromHex($stack[0], $this->ecAdapter)];
154	4	}
155	8	}
156
157	72	if ($type === OutputClassifier::MULTISIG) {
158	24	$info = new Multisig($scriptCode);
159	24	$this->requiredSigs = $info->getRequiredSigCount();
160	24	$this->publicKeys = $info->getKeys();
161
162	24	if ($size > 1) {
163	24	$vars = [];
164	24	foreach (array_slice($stack, 1, -1) as $sig) {
165		$vars[] = TransactionSignatureFactory::fromHex($sig, $this->ecAdapter);
166	16	}
167
168	24	$sigs = $this->sortMultiSigs($sigVersion, $vars, $scriptCode);
169
170	24	foreach ($this->publicKeys as $idx => $key) {
171	24	$this->signatures[$idx] = isset($sigs[$key]) ? $sigs[$key]->getBuffer() : null;
172	16	}
173	16	}
174	16	}
175
176	72	return $type;
177		}
178
179		/**
180		* @return $this
181		*/
182	84	public function extractSignatures()
183		{
184	84	$scriptPubKey = $this->txOut->getScript();
185	84	$scriptSig = $this->tx->getInput($this->nInput)->getScript();
186	84	$type = $this->classifier->classify($scriptPubKey);
187
188	84	if ($type === OutputClassifier::PAYTOPUBKEYHASH \|\| $type === OutputClassifier::PAYTOPUBKEY \|\| $type === OutputClassifier::MULTISIG) {
189	42	$values = [];
190	42	foreach ($scriptSig->getScriptParser()->decode() as $o) {
191	18	$values[] = $o->getData();
192	28	}
193
194	66	$this->extractFromValues($type, $scriptPubKey, $values, 0);
195	28	}
196
197	84	if ($type === OutputClassifier::PAYTOSCRIPTHASH) {
198	24	$decodeSig = $scriptSig->getScriptParser()->decode();
199	24	if (count($decodeSig) > 0) {
200	18	$redeemScript = new Script(end($decodeSig)->getData());
201	18	$p2shType = $this->classifier->classify($redeemScript);
202
203	18	if (count($decodeSig) > 1) {
204	6	$decodeSig = array_slice($decodeSig, 0, -1);
205	4	}
206
207	18	$internalSig = [];
208	18	foreach ($decodeSig as $operation) {
209	18	$internalSig[] = $operation->getData();
210	12	}
211
212	18	$this->redeemScript = $redeemScript;
213	18	$this->extractFromValues($p2shType, $redeemScript, $internalSig, 0);
214
215	18	$type = $p2shType;
216	12	}
217	16	}
218
219	84	$witnesses = $this->tx->getWitnesses();
220	84	if ($type === OutputClassifier::WITNESS_V0_KEYHASH) {
221	12	$this->requiredSigs = 1;
222	12	if (isset($witnesses[$this->nInput])) {
223	12	$witness = $witnesses[$this->nInput];
224	12	$this->signatures = [TransactionSignatureFactory::fromHex($witness[0], $this->ecAdapter)];
225	12	$this->publicKeys = [PublicKeyFactory::fromHex($witness[1], $this->ecAdapter)];
226	8	}
227	82	} else if ($type === OutputClassifier::WITNESS_V0_SCRIPTHASH) {
228	18	if (isset($witnesses[$this->nInput])) {
229	18	$witness = $witnesses[$this->nInput];
230	18	$witCount = count($witnesses[$this->nInput]);
231	18	if ($witCount > 0) {
232	18	$witnessScript = new Script($witness[$witCount - 1]);
233	18	$vWitness = $witness->all();
234	18	if (count($vWitness) > 1) {
235	18	$vWitness = array_slice($witness->all(), 0, -1);
236	12	}
237
238	18	$witnessType = $this->classifier->classify($witnessScript);
239	18	$this->extractFromValues($witnessType, $witnessScript, $vWitness, 1);
240	18	$this->witnessScript = $witnessScript;
241	12	}
242	12	}
243	12	}
244
245	84	return $this;
246		}
247
248		/**
249		* @param ScriptInterface $scriptCode
250		* @param int $sigHashType
251		* @param int $sigVersion
252		* @return BufferInterface
253		*/
254	84	public function calculateSigHash(ScriptInterface $scriptCode, $sigHashType, $sigVersion)
255		{
256	84	if ($sigVersion === 1) {
257	30	$hasher = new V1Hasher($this->tx, $this->txOut->getValue());
258	20	} else {
259	54	$hasher = new Hasher($this->tx);
260		}
261
262	84	return $hasher->calculate($scriptCode, $this->nInput, $sigHashType);
263		}
264
265		/**
266		* @param PrivateKeyInterface $key
267		* @param ScriptInterface $scriptCode
268		* @param int $sigHashType
269		* @param int $sigVersion
270		* @return TransactionSignature
271		*/
272	84	public function calculateSignature(PrivateKeyInterface $key, ScriptInterface $scriptCode, $sigHashType, $sigVersion)
273		{
274	84	$hash = $this->calculateSigHash($scriptCode, $sigHashType, $sigVersion);
275	84	return new TransactionSignature(
276	84	$this->ecAdapter,
277	84	$this->ecAdapter->sign(
278	56	$hash,
279	56	$key,
280	84	new Rfc6979(
281	84	$this->ecAdapter,
282	56	$key,
283	56	$hash,
284	28	'sha256'
285	56	)
286	56	),
287		$sigHashType
288	56	);
289		}
290
291		/**
292		* @return bool
293		*/
294	78	public function isFullySigned()
295		{
296	78	return $this->requiredSigs !== 0 && $this->requiredSigs === count($this->signatures);
297		}
298
299		/**
300		* The function only returns true when $scriptPubKey could be classified
301		*
302		* @param PrivateKeyInterface $key
303		* @param ScriptInterface $scriptPubKey
304		* @param string $outputType
305		* @param BufferInterface[] $results
306		* @param int $sigHashType
307		* @param int $sigVersion
308		* @return bool
309		*/
310	84	private function doSignature(PrivateKeyInterface $key, ScriptInterface $scriptPubKey, &$outputType, array &$results, $sigHashType, $sigVersion = 0)
311		{
312	84	$return = [];
313	84	$outputType = $this->classifier->classify($scriptPubKey, $return);
314	84	if ($outputType === OutputClassifier::UNKNOWN) {
315		throw new \RuntimeException('Cannot sign unknown script type');
316		}
317
318	84	if ($outputType === OutputClassifier::PAYTOPUBKEY) {
319		/** @var BufferInterface $return */
320	12	$results[] = $return;
321	12	$this->requiredSigs = 1;
322	12	if ($key->getPublicKey()->getBuffer()->equals($return)) {
		0 ignored issues – show Documentation introduced 2016-10-14 12:09 UTC by Report Bug Copy Issue Report `$return` is of type `object<BitWasp\Buffertools\BufferInterface>`, but the function expects a `object<self>`. 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...
323	12	$this->signatures[0] = $this->calculateSignature($key, $scriptPubKey, $sigHashType, $sigVersion);
324	8	}
325
326	12	return true;
327		}
328
329	72	if ($outputType === OutputClassifier::PAYTOPUBKEYHASH) {
330		/** @var BufferInterface $return */
331	42	$results[] = $return;
332	42	$this->requiredSigs = 1;
333	42	if ($key->getPublicKey()->getPubKeyHash()->equals($return)) {
		0 ignored issues – show Documentation introduced 2016-10-14 12:09 UTC by Report Bug Copy Issue Report `$return` is of type `object<BitWasp\Buffertools\BufferInterface>`, but the function expects a `object<self>`. 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...
334	36	$this->signatures[0] = $this->calculateSignature($key, $scriptPubKey, $sigHashType, $sigVersion);
335	36	$this->publicKeys[0] = $key->getPublicKey();
336	24	}
337
338	42	return true;
339		}
340
341	48	if ($outputType === OutputClassifier::MULTISIG) {
342	30	$info = new Multisig($scriptPubKey);
343	30	$this->publicKeys = $info->getKeys();
344	30	$this->requiredSigs = $info->getKeyCount();
345
346	30	$myKey = $key->getPublicKey()->getBuffer();
347	30	foreach ($info->getKeys() as $keyIdx => $publicKey) {
348	30	$results[] = $publicKey->getBuffer();
349	30	if ($publicKey->getBuffer()->equals($myKey)) {
		0 ignored issues – show Documentation introduced 2016-10-14 12:09 UTC by Report Bug Copy Issue Report `$myKey` is of type `object<BitWasp\Buffertools\BufferInterface>`, but the function expects a `object<self>`. 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...
350	30	$this->signatures[$keyIdx] = $this->calculateSignature($key, $scriptPubKey, $sigHashType, $sigVersion);
351	20	}
352	20	}
353
354	30	return true;
355		}
356
357	42	if ($outputType === OutputClassifier::PAYTOSCRIPTHASH) {
358		/** @var BufferInterface $scriptHash */
359	24	$scriptHash = $return;
360	24	$results[] = $scriptHash;
361	24	return true;
362		}
363
364	30	if ($outputType === OutputClassifier::WITNESS_V0_KEYHASH) {
365		/** @var BufferInterface $pubKeyHash */
366	12	$pubKeyHash = $return;
367	12	$results[] = $pubKeyHash;
368	12	$this->requiredSigs = 1;
369
370	12	if ($pubKeyHash->getBinary() === $key->getPublicKey()->getPubKeyHash()->getBinary()) {
371	12	$script = ScriptFactory::sequence([Opcodes::OP_DUP, Opcodes::OP_HASH160, $pubKeyHash, Opcodes::OP_EQUALVERIFY, Opcodes::OP_CHECKSIG]);
372	12	$this->signatures[0] = $this->calculateSignature($key, $script, $sigHashType, 1);
373	12	$this->publicKeys[0] = $key->getPublicKey();
374	8	}
375
376	12	return true;
377		}
378
379	18	if ($outputType === OutputClassifier::WITNESS_V0_SCRIPTHASH) {
380		/** @var BufferInterface $scriptHash */
381	18	$scriptHash = $return;
382	18	$results[] = $scriptHash;
383
384	18	return true;
385		}
386
387		return false;
388		}
389
390		/**
391		* @param PrivateKeyInterface $key
392		* @param ScriptInterface\|null $redeemScript
393		* @param ScriptInterface\|null $witnessScript
394		* @param int $sigHashType
395		* @return bool
396		*/
397	84	public function sign(PrivateKeyInterface $key, ScriptInterface $redeemScript = null, ScriptInterface $witnessScript = null, $sigHashType = SigHashInterface::ALL)
398		{
399		/** @var BufferInterface[] $return */
400	84	$type = null;
401	84	$return = [];
402	84	$solved = $this->doSignature($key, $this->txOut->getScript(), $type, $return, $sigHashType, 0);
403
404	84	if ($solved && $type === OutputClassifier::PAYTOSCRIPTHASH) {
405	24	$redeemScriptBuffer = $return[0];
406
407	24	if (!$redeemScript instanceof ScriptInterface) {
408		throw new \InvalidArgumentException('Must provide redeem script for P2SH');
409		}
410
411	24	if (!$redeemScript->getScriptHash()->equals($redeemScriptBuffer)) {
		0 ignored issues – show Documentation introduced 2016-07-06 14:20 UTC by Report Bug Copy Issue Report `$redeemScriptBuffer` is of type `object<BitWasp\Buffertools\BufferInterface>`, but the function expects a `object<self>`. It seems like the type of the argument is not accepted by the function/method which you are calling. In some cases, in particular if PHP’s automatic type-juggling kicks in this might be fine. In other cases, however this might be a bug. We suggest to add an explicit type cast like in the following example: function acceptsInteger($int) { } $x = '123'; // string "123" // Instead of acceptsInteger($x); // we recommend to use acceptsInteger((integer) $x); Loading history...
412		throw new \InvalidArgumentException("Incorrect redeem script - hash doesn't match");
413		}
414
415	24	$results = []; // ???
416	24	$solved = $solved && $this->doSignature($key, $redeemScript, $type, $results, $sigHashType, 0) && $type !== OutputClassifier::PAYTOSCRIPTHASH;
417	24	if ($solved) {
418	24	$this->redeemScript = $redeemScript;
419	16	}
420	16	}
421
422	84	if ($solved && $type === OutputClassifier::WITNESS_V0_KEYHASH) {
423	12	$pubKeyHash = $return[0];
424	12	$witnessScript = ScriptFactory::sequence([Opcodes::OP_DUP, Opcodes::OP_HASH160, $pubKeyHash, Opcodes::OP_EQUALVERIFY, Opcodes::OP_CHECKSIG]);
425	12	$subType = null;
426	12	$subResults = [];
427	12	$solved = $solved && $this->doSignature($key, $witnessScript, $subType, $subResults, $sigHashType, 1);
428	80	} else if ($solved && $type === OutputClassifier::WITNESS_V0_SCRIPTHASH) {
429	18	$scriptHash = $return[0];
430
431	18	if (!$witnessScript instanceof ScriptInterface) {
432		throw new \InvalidArgumentException('Must provide witness script for witness v0 scripthash');
433		}
434
435	18	if (!Hash::sha256($witnessScript->getBuffer())->getBinary() === $scriptHash->getBinary()) {
436		throw new \InvalidArgumentException("Incorrect witness script - hash doesn't match");
437		}
438
439	18	$subType = null;
440	18	$subResults = [];
441
442	18	$solved = $solved && $this->doSignature($key, $witnessScript, $subType, $subResults, $sigHashType, 1)
443	18	&& $subType !== OutputClassifier::PAYTOSCRIPTHASH
444	18	&& $subType !== OutputClassifier::WITNESS_V0_SCRIPTHASH
445	18	&& $subType !== OutputClassifier::WITNESS_V0_KEYHASH;
446
447	18	if ($solved) {
448	18	$this->witnessScript = $witnessScript;
449	12	}
450	12	}
451
452	84	return $solved;
453		}
454
455		/**
456		* @param string $outputType
457		* @param $answer
458		* @return bool
459		*/
460	84	private function serializeSimpleSig($outputType, &$answer)
461		{
462	84	if ($outputType === OutputClassifier::UNKNOWN) {
463		throw new \RuntimeException('Cannot sign unknown script type');
464		}
465
466	84	if ($outputType === OutputClassifier::PAYTOPUBKEY && $this->isFullySigned()) {
467	12	$answer = new SigValues(ScriptFactory::sequence([$this->signatures[0]->getBuffer()]), new ScriptWitness([]));
468	12	return true;
469		}
470
471	72	if ($outputType === OutputClassifier::PAYTOPUBKEYHASH && $this->isFullySigned()) {
472	30	$answer = new SigValues(ScriptFactory::sequence([$this->signatures[0]->getBuffer(), $this->publicKeys[0]->getBuffer()]), new ScriptWitness([]));
473	30	return true;
474		}
475
476	48	if ($outputType === OutputClassifier::MULTISIG) {
477	30	$sequence = [Opcodes::OP_0];
478	30	$nPubKeys = count($this->publicKeys);
479	30	for ($i = 0; $i < $nPubKeys; $i++) {
480	30	if (isset($this->signatures[$i])) {
481	30	$sequence[] = $this->signatures[$i]->getBuffer();
482	20	}
483	20	}
484
485	30	$answer = new SigValues(ScriptFactory::sequence($sequence), new ScriptWitness([]));
486	30	return true;
487		}
488
489	42	return false;
490		}
491
492		/**
493		* @return SigValues
494		*/
495	84	public function serializeSignatures()
496		{
497	84	static $emptyScript = null;
498	84	static $emptyWitness = null;
499	84	if (is_null($emptyScript) \|\| is_null($emptyWitness)) {
500	6	$emptyScript = new Script();
501	6	$emptyWitness = new ScriptWitness([]);
502	4	}
503
504		/** @var BufferInterface[] $return */
505	84	$outputType = $this->classifier->classify($this->txOut->getScript());
506
507		/** @var SigValues $answer */
508	84	$answer = new SigValues($emptyScript, $emptyWitness);
509	84	$serialized = $this->serializeSimpleSig($outputType, $answer);
510
511	84	$p2sh = false;
512	84	if (!$serialized && $outputType === OutputClassifier::PAYTOSCRIPTHASH) {
513	24	$p2sh = true;
514	24	$outputType = $this->classifier->classify($this->redeemScript);
515	24	$serialized = $this->serializeSimpleSig($outputType, $answer);
516	16	}
517
518	84	if (!$serialized && $outputType === OutputClassifier::WITNESS_V0_KEYHASH) {
519	12	$answer = new SigValues($emptyScript, new ScriptWitness([$this->signatures[0]->getBuffer(), $this->publicKeys[0]->getBuffer()]));
520	80	} else if (!$serialized && $outputType === OutputClassifier::WITNESS_V0_SCRIPTHASH) {
521	18	$outputType = $this->classifier->classify($this->witnessScript);
522	18	$serialized = $this->serializeSimpleSig($outputType, $answer);
523
524	18	if ($serialized) {
525	18	$data = [];
526	18	foreach ($answer->getScriptSig()->getScriptParser()->decode() as $o) {
527	18	$data[] = $o->getData();
528	12	}
529
530	18	$data[] = $this->witnessScript->getBuffer();
531	18	$answer = new SigValues($emptyScript, new ScriptWitness($data));
532	12	}
533	12	}
534
535	84	if ($p2sh) {
536	24	$answer = new SigValues(
537	24	ScriptFactory::create($answer->getScriptSig()->getBuffer())->push($this->redeemScript->getBuffer())->getScript(),
538	24	$answer->getScriptWitness()
539	16	);
540	16	}
541
542	84	return $answer;
543		}
544		}
545

Bit-Wasp / bitcoin-php

Pull Request — master (#384)

InputSigner::extractFromValues() D

Complexity

Size

Duplication

Code Coverage

Importance

How to fix Complexity

Long Method

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