TxSigner::makeSignature() - Code Metrics - Inspection of "Merge pull request #222 from afk11/readme-fixes" - Bit-Wasp/bitcoin-php - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — master ( 0c9ae2...053212 )

by thomas

created 2015-12-21 04:30 UTC

TxSigner::makeSignature() A

↳ Parent: TxSigner

Complexity

Conditions	2
Paths	1

Size

Total Lines	19
Code Lines	14

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	15
CRAP Score	2

Metric	Value
dl	0
loc	19
ccs	15
cts	15
cp	1
rs	9.4286
cc	2
eloc	14
nc	1
nop	3
crap	2

<?php

namespace BitWasp\Bitcoin\Transaction\Factory;

use BitWasp\Bitcoin\Crypto\EcAdapter\Adapter\EcAdapterInterface;
use BitWasp\Bitcoin\Crypto\Random\Random;
use BitWasp\Bitcoin\Crypto\Random\Rfc6979;
use BitWasp\Bitcoin\Exceptions\BuilderNoInputState;
use BitWasp\Bitcoin\Crypto\EcAdapter\Key\PrivateKeyInterface;
use BitWasp\Bitcoin\Script\Classifier\OutputClassifier;
use BitWasp\Bitcoin\Script\ScriptInterface;
use BitWasp\Bitcoin\Signature\TransactionSignature;
use BitWasp\Bitcoin\Transaction\Mutator\TxMutator;
use \BitWasp\Bitcoin\Crypto\EcAdapter\Impl\Secp256k1\Adapter\EcAdapter as Secp256k1Adapter;
use BitWasp\Bitcoin\Transaction\SignatureHash\SignatureHashInterface;
use BitWasp\Bitcoin\Transaction\TransactionInterface;
use BitWasp\Buffertools\Buffer;

class TxSigner
{
    /**
     * @var TransactionInterface
     */
    private $transaction;

    /**
     * @var \BitWasp\Bitcoin\Transaction\SignatureHash\Hasher
     */
    private $signatureHash;

    /**
     * @var bool
     */
    private $deterministicSignatures = true;

    /**
     * @var TxSignerContext[]
     */
    private $inputStates = [];

    /**
     * @var EcAdapterInterface
     */
    private $ecAdapter;

    /**
     * @param EcAdapterInterface $ecAdapter
     * @param TransactionInterface $tx
     */
    public function __construct(EcAdapterInterface $ecAdapter, TransactionInterface $tx)
    {
        $this->transaction = $tx;
        $this->signatureHash = $tx->getSignatureHash();
        $this->ecAdapter = $ecAdapter;
    }

    /**
     * @return $this
     */
    public function useRandomSignatures()
    {
        if ($this->ecAdapter instanceof Secp256k1Adapter) {
            throw new \RuntimeException('Secp256k1 extension does not yet support random signatures');
        }

        $this->deterministicSignatures = false;
        return $this;
    }

    /**
     * @return $this
     */
    public function useDeterministicSignatures()
    {
        $this->deterministicSignatures = true;
        return $this;
    }

    /**
     * @param PrivateKeyInterface $privKey
     * @param Buffer $hash
     * @param $sigHashType
     * @return TransactionSignature
     */
    public function makeSignature(PrivateKeyInterface $privKey, Buffer $hash, $sigHashType)
    {
        return new TransactionSignature(
            $this->ecAdapter,
            $this->ecAdapter->sign(
                $hash,
                $privKey,
                $this->deterministicSignatures
                ? new Rfc6979(
                    $this->ecAdapter,
                    $privKey,
                    $hash,
                    'sha256'
                )
                : new Random()
            ),
            $sigHashType
        );
    }

    /**
     * @param integer $input
     * @return TxSignerContext
     * @throws BuilderNoInputState
     */
    public function inputState($input)
    {
        $this->transaction->getInput($input);
        if (!array_key_exists($input, $this->inputStates)) {
            throw new BuilderNoInputState('State not found for this input');
        }

        return $this->inputStates[$input];
    }

    /**
     * @param integer $inputToSign
     * @param ScriptInterface $outputScript
     * @param ScriptInterface $redeemScript
     * @return TxSignerContext
     */
    private function createInputState($inputToSign, $outputScript, ScriptInterface $redeemScript = null)
    {
        $state = (new TxSignerContext($this->ecAdapter, $outputScript, $redeemScript))
            ->extractSigs($this->transaction, $inputToSign);

        $this->inputStates[$inputToSign] = $state;

        return $state;
    }

    /**
     * @param integer $inputToSign
     * @param PrivateKeyInterface $privateKey
     * @param ScriptInterface $outputScript
     * @param ScriptInterface $redeemScript
     * @param int $sigHashType
     * @return $this
     */
    public function sign(
        $inputToSign,
        PrivateKeyInterface $privateKey,
        ScriptInterface $outputScript,
        ScriptInterface $redeemScript = null,
        $sigHashType = SignatureHashInterface::SIGHASH_ALL
    ) {
        // If the input state hasn't been set up, do so now.
        try {
            $inputState = $this->inputState($inputToSign);
        } catch (BuilderNoInputState $e) {
            $inputState = $this->createInputState($inputToSign, $outputScript, $redeemScript);
        }

        // If it's PayToPubkey / PayToPubkeyHash, TransactionBuilderInputState needs to know the public key.
        if ($inputState->getPrevOutType() === OutputClassifier::PAYTOPUBKEYHASH) {
            $inputState->setPublicKeys([$privateKey->getPublicKey()]);
        }

        // loop over the publicKeys to find the key to sign with
        foreach ($inputState->getPublicKeys() as $idx => $publicKey) {
            if ($privateKey->getPublicKey()->getBinary() === $publicKey->getBinary()) {
                $signature = $this->makeSignature(
                    $privateKey,
                    $this->signatureHash->calculate($redeemScript ?: $outputScript, $inputToSign, $sigHashType),
                    $sigHashType
                );

                $inputState->setSignature($idx, $signature);
            }
        }

        return $this;
    }

    /**
     * @return TransactionInterface
     */
    public function get()
    {
        $mutator = new TxMutator($this->transaction);
        $inputs = $mutator->inputsMutator();
        $txInputs = $this->transaction->getInputs();

        $i = 0;
        foreach ($inputs as $input) {
            // Call regenerateScript if inputState is set, otherwise defer to previous script.
            try {
                $script = $this->inputState($i)->regenerateScript();
            } catch (BuilderNoInputState $e) {
                $script = $txInputs[$i]->getScript();
            }

            $input->script($script);
            $i++;
        }

        return $mutator->done();
    }

    /**
     * @return bool
     */
    public function isFullySigned()
    {
        foreach ($this->transaction->getInputs() as $i => $input) {
            if (array_key_exists($i, $this->inputStates)) {
                /** @var TxSignerContext $state */
                $state = $this->inputStates[$i];
                if (!$state->isFullySigned()) {
                    return false;
                }
            }
        }

        return true;
    }
}


1		<?php
2
3		namespace BitWasp\Bitcoin\Transaction\Factory;
4
5		use BitWasp\Bitcoin\Crypto\EcAdapter\Adapter\EcAdapterInterface;
6		use BitWasp\Bitcoin\Crypto\Random\Random;
7		use BitWasp\Bitcoin\Crypto\Random\Rfc6979;
8		use BitWasp\Bitcoin\Exceptions\BuilderNoInputState;
9		use BitWasp\Bitcoin\Crypto\EcAdapter\Key\PrivateKeyInterface;
10		use BitWasp\Bitcoin\Script\Classifier\OutputClassifier;
11		use BitWasp\Bitcoin\Script\ScriptInterface;
12		use BitWasp\Bitcoin\Signature\TransactionSignature;
13		use BitWasp\Bitcoin\Transaction\Mutator\TxMutator;
14		use \BitWasp\Bitcoin\Crypto\EcAdapter\Impl\Secp256k1\Adapter\EcAdapter as Secp256k1Adapter;
15		use BitWasp\Bitcoin\Transaction\SignatureHash\SignatureHashInterface;
16		use BitWasp\Bitcoin\Transaction\TransactionInterface;
17		use BitWasp\Buffertools\Buffer;
18
19		class TxSigner
20		{
21		/**
22		* @var TransactionInterface
23		*/
24		private $transaction;
25
26		/**
27		* @var \BitWasp\Bitcoin\Transaction\SignatureHash\Hasher
28		*/
29		private $signatureHash;
30
31		/**
32		* @var bool
33		*/
34		private $deterministicSignatures = true;
35
36		/**
37		* @var TxSignerContext[]
38		*/
39		private $inputStates = [];
40
41		/**
42		* @var EcAdapterInterface
43		*/
44		private $ecAdapter;
45
46		/**
47		* @param EcAdapterInterface $ecAdapter
48		* @param TransactionInterface $tx
49		*/
50	90	public function __construct(EcAdapterInterface $ecAdapter, TransactionInterface $tx)
51		{
52	90	$this->transaction = $tx;
53	90	$this->signatureHash = $tx->getSignatureHash();
54	90	$this->ecAdapter = $ecAdapter;
55	90	}
56
57		/**
58		* @return $this
59		*/
60	81	public function useRandomSignatures()
61	81	{
62	9	if ($this->ecAdapter instanceof Secp256k1Adapter) {
63	3	throw new \RuntimeException('Secp256k1 extension does not yet support random signatures');
64		}
65
66	6	$this->deterministicSignatures = false;
67	6	return $this;
68		}
69
70		/**
71		* @return $this
72		*/
73	6	public function useDeterministicSignatures()
74		{
75	6	$this->deterministicSignatures = true;
76	6	return $this;
77		}
78
79		/**
80		* @param PrivateKeyInterface $privKey
81		* @param Buffer $hash
82		* @param $sigHashType
83		* @return TransactionSignature
84		*/
85	81	public function makeSignature(PrivateKeyInterface $privKey, Buffer $hash, $sigHashType)
86		{
87	81	return new TransactionSignature(
88	81	$this->ecAdapter,
89	81	$this->ecAdapter->sign(
90	81	$hash,
91	81	$privKey,
92	81	$this->deterministicSignatures
93	81	? new Rfc6979(
94	81	$this->ecAdapter,
95	81	$privKey,
96	81	$hash,
97		'sha256'
98	81	)
99	81	: new Random()
100	81	),
101		$sigHashType
102	81	);
103		}
104
105		/**
106		* @param integer $input
107		* @return TxSignerContext
108		* @throws BuilderNoInputState
109		*/
110	81	public function inputState($input)
111		{
112	81	$this->transaction->getInput($input);
113	81	if (!array_key_exists($input, $this->inputStates)) {
114	81	throw new BuilderNoInputState('State not found for this input');
115		}
116
117	75	return $this->inputStates[$input];
118		}
119
120		/**
121		* @param integer $inputToSign
122		* @param ScriptInterface $outputScript
123		* @param ScriptInterface $redeemScript
124		* @return TxSignerContext
125		*/
126	81	private function createInputState($inputToSign, $outputScript, ScriptInterface $redeemScript = null)
127		{
128	81	$state = (new TxSignerContext($this->ecAdapter, $outputScript, $redeemScript))
129	81	->extractSigs($this->transaction, $inputToSign);
130
131	81	$this->inputStates[$inputToSign] = $state;
132
133	81	return $state;
134		}
135
136		/**
137		* @param integer $inputToSign
138		* @param PrivateKeyInterface $privateKey
139		* @param ScriptInterface $outputScript
140		* @param ScriptInterface $redeemScript
141		* @param int $sigHashType
142		* @return $this
143		*/
144	81	public function sign(
145		$inputToSign,
146		PrivateKeyInterface $privateKey,
147		ScriptInterface $outputScript,
148		ScriptInterface $redeemScript = null,
149		$sigHashType = SignatureHashInterface::SIGHASH_ALL
150		) {
151		// If the input state hasn't been set up, do so now.
152		try {
153	81	$inputState = $this->inputState($inputToSign);
154	81	} catch (BuilderNoInputState $e) {
155	81	$inputState = $this->createInputState($inputToSign, $outputScript, $redeemScript);
156		}
157
158		// If it's PayToPubkey / PayToPubkeyHash, TransactionBuilderInputState needs to know the public key.
159	81	if ($inputState->getPrevOutType() === OutputClassifier::PAYTOPUBKEYHASH) {
160	39	$inputState->setPublicKeys([$privateKey->getPublicKey()]);
161	39	}
162
163		// loop over the publicKeys to find the key to sign with
164	81	foreach ($inputState->getPublicKeys() as $idx => $publicKey) {
165	81	if ($privateKey->getPublicKey()->getBinary() === $publicKey->getBinary()) {
166	81	$signature = $this->makeSignature(
167	81	$privateKey,
168	81	$this->signatureHash->calculate($redeemScript ?: $outputScript, $inputToSign, $sigHashType),
169		$sigHashType
170	81	);
171
172	81	$inputState->setSignature($idx, $signature);
173	81	}
174	81	}
175
176	81	return $this;
177		}
178
179		/**
180		* @return TransactionInterface
181		*/
182	69	public function get()
183		{
184	69	$mutator = new TxMutator($this->transaction);
185	69	$inputs = $mutator->inputsMutator();
186	69	$txInputs = $this->transaction->getInputs();
187
188	69	$i = 0;
189	69	foreach ($inputs as $input) {
190		// Call regenerateScript if inputState is set, otherwise defer to previous script.
191		try {
192	69	$script = $this->inputState($i)->regenerateScript();
193	69	} catch (BuilderNoInputState $e) {
194	12	$script = $txInputs[$i]->getScript();
195		}
196
197	69	$input->script($script);
198	69	$i++;
199	69	}
200
201	69	return $mutator->done();
202		}
203
204		/**
205		* @return bool
206		*/
207	18	public function isFullySigned()
208		{
209	18	foreach ($this->transaction->getInputs() as $i => $input) {
210	18	if (array_key_exists($i, $this->inputStates)) {
211		/** @var TxSignerContext $state */
212	18	$state = $this->inputStates[$i];
213	18	if (!$state->isFullySigned()) {
214		return false;
215		}
216	18	}
217	18	}
218
219	18	return true;
220		}
221		}
222

Bit-Wasp / bitcoin-php

Push — master ( 0c9ae2...053212 )

TxSigner::makeSignature() A

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