HierarchicalKey::toPublic() - Code Metrics - Inspection of "HierarchicalKey & slip132" - Bit-Wasp/bitcoin-php - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — 0.0.35 (#660)

by thomas

created 2018-03-06 22:43 UTC

HierarchicalKey::toPublic() A

↳ Parent: HierarchicalKey

Complexity

Conditions	2
Paths	2

Size

Total Lines	8
Code Lines	4

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	4
CRAP Score	2

Importance

Changes

Metric	Value
cc	2
eloc	4
nc	2
nop	0
dl	0
loc	8
ccs	4
cts	4
cp	1
crap	2
rs	9.4285
c	0
b	0
f	0

<?php

namespace BitWasp\Bitcoin\Key\Deterministic;

use BitWasp\Bitcoin\Address\BaseAddressCreator;
use BitWasp\Bitcoin\Bitcoin;
use BitWasp\Bitcoin\Crypto\EcAdapter\Adapter\EcAdapterInterface;
use BitWasp\Bitcoin\Crypto\EcAdapter\Key\KeyInterface;
use BitWasp\Bitcoin\Crypto\EcAdapter\Key\PrivateKeyInterface;
use BitWasp\Bitcoin\Crypto\EcAdapter\Key\PublicKeyInterface;
use BitWasp\Bitcoin\Crypto\Hash;
use BitWasp\Bitcoin\Key\KeyToScript\ScriptAndSignData;
use BitWasp\Bitcoin\Key\KeyToScript\ScriptDataFactory;
use BitWasp\Bitcoin\Network\NetworkInterface;
use BitWasp\Bitcoin\Serializer\Key\HierarchicalKey\Base58ExtendedKeySerializer;
use BitWasp\Bitcoin\Serializer\Key\HierarchicalKey\ExtendedKeySerializer;
use BitWasp\Bitcoin\Util\IntRange;
use BitWasp\Buffertools\Buffer;
use BitWasp\Buffertools\BufferInterface;
use BitWasp\Buffertools\Buffertools;
use BitWasp\Buffertools\Parser;

class HierarchicalKey
{
    /**
     * @var EcAdapterInterface
     */
    protected $ecAdapter;

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

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

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

    /**
     * @var BufferInterface
     */
    private $chainCode;

    /**
     * @var KeyInterface
     */
    private $key;

    /**
     * @var ScriptDataFactory
     */
    private $scriptDataFactory;

    /**
     * @var ScriptAndSignData|null
     */
    private $scriptAndSignData;

    /**
     * @param EcAdapterInterface $ecAdapter
     * @param ScriptDataFactory $scriptDataFactory
     * @param int $depth
     * @param int $parentFingerprint
     * @param int $sequence
     * @param BufferInterface $chainCode
     * @param KeyInterface $key
     */
    public function __construct(EcAdapterInterface $ecAdapter, ScriptDataFactory $scriptDataFactory, $depth, $parentFingerprint, $sequence, BufferInterface $chainCode, KeyInterface $key)
    {
        if ($depth < 0 || $depth > IntRange::U8_MAX) {
            throw new \InvalidArgumentException('Invalid depth for BIP32 key, must be in range [0 - 255] inclusive');
        }

        if ($parentFingerprint < 0 || $parentFingerprint > IntRange::U32_MAX) {
            throw new \InvalidArgumentException('Invalid fingerprint for BIP32 key, must be in range [0 - (2^31)-1] inclusive');
        }

        if ($sequence < 0 || $sequence > IntRange::U32_MAX) {
            throw new \InvalidArgumentException('Invalid sequence for BIP32 key, must be in range [0 - (2^31)-1] inclusive');
        }

        if ($chainCode->getSize() !== 32) {
            throw new \RuntimeException('Chaincode should be 32 bytes');
        }

        if (!$key->isCompressed()) {
            throw new \InvalidArgumentException('A HierarchicalKey must always be compressed');
        }

        $this->ecAdapter = $ecAdapter;
        $this->depth = $depth;
        $this->sequence = $sequence;
        $this->parentFingerprint = $parentFingerprint;
        $this->chainCode = $chainCode;
        $this->key = $key;
        $this->scriptDataFactory = $scriptDataFactory;
    }

    /**
     * Return the depth of this key. This is limited to 256 sequential derivations.
     *
     * @return int
     */
    public function getDepth()
    {
        return $this->depth;
    }

    /**
     * Get the sequence number for this address. Hardened keys are
     * created with sequence > 0x80000000. a sequence number lower
     * than this can be derived with the public key.
     *
     * @return int
     */
    public function getSequence()
    {
        return $this->sequence;
    }

    /**
     * Get the fingerprint of the parent key. For master keys, this is 00000000.
     *
     * @return string
     */
    public function getFingerprint()
    {
        if ($this->getDepth() === 0) {
            return 0;
        }

        return $this->parentFingerprint;
    }

    /**
     * Return the fingerprint to be used for child keys.
     * @return int
     */
    public function getChildFingerprint()
    {
        return $this->getPublicKey()->getPubKeyHash()->slice(0, 4)->getInt();
    }

    /**
     * Return the chain code - a deterministic 'salt' for HMAC-SHA512
     * in child derivations
     *
     * @return BufferInterface
     */
    public function getChainCode()
    {
        return $this->chainCode;
    }

    /**
     * @return PrivateKeyInterface
     */
    public function getPrivateKey()
    {
        if ($this->key->isPrivate()) {
            /** @var PrivateKeyInterface $key */
            $key = $this->key;
            return $key;
        }

        throw new \RuntimeException('Unable to get private key, not known');
    }

    /**
     * Get the public key the private key or public key.
     *
     * @return PublicKeyInterface
     */
    public function getPublicKey()
    {
        if ($this->isPrivate()) {
            return $this->getPrivateKey()->getPublicKey();
        } else {
            /** @var PublicKeyInterface $key */
            $key = $this->key;
            return $key;
        }
    }

    /**
     * @return HierarchicalKey
     */
    public function withoutPrivateKey()
    {
        $clone = clone $this;
        $clone->key = $clone->getPublicKey();
        return $clone;
    }

    /**
     * @param ScriptDataFactory $factory
     * @return HierarchicalKey
     */
    public function withScriptFactory(ScriptDataFactory $factory)
    {
        $clone = clone $this;
        $clone->scriptDataFactory = $factory;
        return $clone;
    }

    /**
     * @return ScriptDataFactory
     */
    public function getScriptDataFactory()
    {
        return $this->scriptDataFactory;
    }

    /**
     * @return \BitWasp\Bitcoin\Key\KeyToScript\ScriptAndSignData
     */
    public function getScriptAndSignData()
    {
        if (null === $this->scriptAndSignData) {
            $this->scriptAndSignData = $this->scriptDataFactory->convertKey($this->key);
        }

        return $this->scriptAndSignData;
    }

    /**
     * @param BaseAddressCreator $addressCreator
     * @return \BitWasp\Bitcoin\Address\Address
     */
    public function getAddress(BaseAddressCreator $addressCreator)
    {
        return $this->getScriptAndSignData()->getAddress($addressCreator);
    }

    /**
     * Return whether this is a private key
     *
     * @return bool
     */
    public function isPrivate()
    {
        return $this->key->isPrivate();
    }

    /**
     * Return whether the key is hardened
     *
     * @return bool
     */
    public function isHardened()
    {
        return ($this->sequence >> 31) === 1;
    }

    /**
     * Create a buffer containing data to be hashed hashed to yield the child offset
     *
     * @param int $sequence
     * @return BufferInterface
     * @throws \Exception
     */
    public function getHmacSeed($sequence)
    {
        if ($sequence < 0 || $sequence > IntRange::U32_MAX) {
            throw new \InvalidArgumentException("Sequence is outside valid range, must be >= 0 && <= (2^31)-1");
        }

        if (($sequence >> 31) === 1) {
            if ($this->isPrivate() === false) {
                throw new \Exception("Can't derive a hardened key without the private key");
            }

            $buffer = Buffertools::concat(new Buffer("\x00"), $this->getPrivateKey()->getBuffer());
        } else {
            $buffer = $this->getPublicKey()->getBuffer();
        }

        return (new Parser($buffer))
            ->writeBytes(4, Buffer::int($sequence, 4))
            ->getBuffer();
    }

    /**
     * Derive a child key
     *
     * @param int $sequence
     * @return HierarchicalKey
     * @throws \Exception
     */
    public function deriveChild($sequence)
    {
        $nextDepth = $this->depth + 1;
        if ($nextDepth > 255) {
            throw new \InvalidArgumentException('Invalid depth for BIP32 key, cannot exceed 255');
        }

        $hash = Hash::hmac('sha512', $this->getHmacSeed($sequence), $this->chainCode);
        $offset = $hash->slice(0, 32);
        $chain = $hash->slice(32);

        if (false === $this->ecAdapter->validatePrivateKey($offset)) {
            return $this->deriveChild($sequence + 1);
        }

        $key = $this->isPrivate() ? $this->getPrivateKey() : $this->getPublicKey();
        $key = $key->tweakAdd($offset->getGmp());

        return new HierarchicalKey(
            $this->ecAdapter,
            $this->scriptDataFactory,
            $nextDepth,
            $this->getChildFingerprint(),
            $sequence,
            $chain,
            $key
        );
    }

    /**
     * @param array|\stdClass|\Traversable $list
     * @return HierarchicalKey
     * @throws \Exception
     */
    public function deriveFromList($list)
    {
        if (!is_array($list) && !$list instanceof \Traversable && !$list instanceof \stdClass) {
            throw new \InvalidArgumentException('List must be an array or \Traversable');
        }

        $key = $this;
        foreach ($list as $sequence) {
$collection = json_decode($data, true);
if ( ! is_array($collection)) {
    throw new \RuntimeException('$collection must be an array.');
}

foreach ($collection as $item) { /** ... */ }
            $key = $key->deriveChild($sequence);
        }

        return $key;
    }

    /**
     * Decodes a BIP32 path into actual 32bit sequence numbers and derives the child key
     *
     * @param string $path
     * @return HierarchicalKey
     * @throws \Exception
     */
    public function derivePath($path)
    {
        $sequences = new HierarchicalKeySequence();
        return $this->deriveFromList($sequences->decodePath($path));
    }

    /**
     * Serializes the instance according to whether it wraps a private or public key.
     * @param NetworkInterface $network
     * @return string
     */
    public function toExtendedKey(NetworkInterface $network = null)
    {
        $network = $network ?: Bitcoin::getNetwork();

        $extendedSerializer = new Base58ExtendedKeySerializer(new ExtendedKeySerializer($this->ecAdapter));
        $extended = $extendedSerializer->serialize($network, $this);
        return $extended;
    }

    /**
     * Explicitly serialize as a private key. Throws an exception if
     * the key isn't private.
     *
     * @param NetworkInterface $network
     * @return string
     */
    public function toExtendedPrivateKey(NetworkInterface $network = null)
    {
        if (!$this->isPrivate()) {
            throw new \LogicException('Cannot create extended private key from public');
        }

        return $this->toExtendedKey($network);
    }

    /**
     * Explicitly serialize as a public key. This will always work.
     *
     * @param NetworkInterface $network
     * @return string
     */
    public function toExtendedPublicKey(NetworkInterface $network = null)
    {
        return $this->withoutPrivateKey()->toExtendedKey($network);
    }
}


1		<?php
2
3		namespace BitWasp\Bitcoin\Key\Deterministic;
4
5		use BitWasp\Bitcoin\Address\BaseAddressCreator;
6		use BitWasp\Bitcoin\Bitcoin;
7		use BitWasp\Bitcoin\Crypto\EcAdapter\Adapter\EcAdapterInterface;
8		use BitWasp\Bitcoin\Crypto\EcAdapter\Key\KeyInterface;
9		use BitWasp\Bitcoin\Crypto\EcAdapter\Key\PrivateKeyInterface;
10		use BitWasp\Bitcoin\Crypto\EcAdapter\Key\PublicKeyInterface;
11		use BitWasp\Bitcoin\Crypto\Hash;
12		use BitWasp\Bitcoin\Key\KeyToScript\ScriptAndSignData;
13		use BitWasp\Bitcoin\Key\KeyToScript\ScriptDataFactory;
14		use BitWasp\Bitcoin\Network\NetworkInterface;
15		use BitWasp\Bitcoin\Serializer\Key\HierarchicalKey\Base58ExtendedKeySerializer;
16		use BitWasp\Bitcoin\Serializer\Key\HierarchicalKey\ExtendedKeySerializer;
17		use BitWasp\Bitcoin\Util\IntRange;
18		use BitWasp\Buffertools\Buffer;
19		use BitWasp\Buffertools\BufferInterface;
20		use BitWasp\Buffertools\Buffertools;
21		use BitWasp\Buffertools\Parser;
22
23		class HierarchicalKey
24		{
25		/**
26		* @var EcAdapterInterface
27		*/
28		protected $ecAdapter;
29
30		/**
31		* @var int
32		*/
33		private $depth;
34
35		/**
36		* @var int
37		*/
38		private $parentFingerprint;
39
40		/**
41		* @var int
42		*/
43		private $sequence;
44
45		/**
46		* @var BufferInterface
47		*/
48		private $chainCode;
49
50		/**
51		* @var KeyInterface
52		*/
53		private $key;
54
55		/**
56		* @var ScriptDataFactory
57		*/
58		private $scriptDataFactory;
59
60		/**
61		* @var ScriptAndSignData\|null
62		*/
63		private $scriptAndSignData;
64
65		/**
66		* @param EcAdapterInterface $ecAdapter
67		* @param ScriptDataFactory $scriptDataFactory
68		* @param int $depth
69		* @param int $parentFingerprint
70		* @param int $sequence
71		* @param BufferInterface $chainCode
72		* @param KeyInterface $key
73		*/
74	75	public function __construct(EcAdapterInterface $ecAdapter, ScriptDataFactory $scriptDataFactory, $depth, $parentFingerprint, $sequence, BufferInterface $chainCode, KeyInterface $key)
75		{
76	75	if ($depth < 0 \|\| $depth > IntRange::U8_MAX) {
77		throw new \InvalidArgumentException('Invalid depth for BIP32 key, must be in range [0 - 255] inclusive');
78		}
79
80	75	if ($parentFingerprint < 0 \|\| $parentFingerprint > IntRange::U32_MAX) {
81		throw new \InvalidArgumentException('Invalid fingerprint for BIP32 key, must be in range [0 - (2^31)-1] inclusive');
82		}
83
84	75	if ($sequence < 0 \|\| $sequence > IntRange::U32_MAX) {
85		throw new \InvalidArgumentException('Invalid sequence for BIP32 key, must be in range [0 - (2^31)-1] inclusive');
86		}
87
88	75	if ($chainCode->getSize() !== 32) {
89		throw new \RuntimeException('Chaincode should be 32 bytes');
90		}
91
92	75	if (!$key->isCompressed()) {
93	1	throw new \InvalidArgumentException('A HierarchicalKey must always be compressed');
94		}
95
96	74	$this->ecAdapter = $ecAdapter;
97	74	$this->depth = $depth;
98	74	$this->sequence = $sequence;
99	74	$this->parentFingerprint = $parentFingerprint;
100	74	$this->chainCode = $chainCode;
101	74	$this->key = $key;
102	74	$this->scriptDataFactory = $scriptDataFactory;
103	74	}
104
105		/**
106		* Return the depth of this key. This is limited to 256 sequential derivations.
107		*
108		* @return int
109		*/
110	34	public function getDepth()
111		{
112	34	return $this->depth;
113		}
114
115		/**
116		* Get the sequence number for this address. Hardened keys are
117		* created with sequence > 0x80000000. a sequence number lower
118		* than this can be derived with the public key.
119		*
120		* @return int
121		*/
122	29	public function getSequence()
123		{
124	29	return $this->sequence;
125		}
126
127		/**
128		* Get the fingerprint of the parent key. For master keys, this is 00000000.
129		*
130		* @return string
131		*/
132	30	public function getFingerprint()
133		{
134	30	if ($this->getDepth() === 0) {
135	14	return 0;
136		}
137
138	30	return $this->parentFingerprint;
139		}
140
141		/**
142		* Return the fingerprint to be used for child keys.
143		* @return int
144		*/
145	37	public function getChildFingerprint()
146		{
147	37	return $this->getPublicKey()->getPubKeyHash()->slice(0, 4)->getInt();
148		}
149
150		/**
151		* Return the chain code - a deterministic 'salt' for HMAC-SHA512
152		* in child derivations
153		*
154		* @return BufferInterface
155		*/
156	28	public function getChainCode()
157		{
158	28	return $this->chainCode;
159		}
160
161		/**
162		* @return PrivateKeyInterface
163		*/
164	46	public function getPrivateKey()
165		{
166	46	if ($this->key->isPrivate()) {
167		/** @var PrivateKeyInterface $key */
168	44	$key = $this->key;
169	44	return $key;
170		}
171
172	2	throw new \RuntimeException('Unable to get private key, not known');
173		}
174
175		/**
176		* Get the public key the private key or public key.
177		*
178		* @return PublicKeyInterface
179		*/
180	48	public function getPublicKey()
181		{
182	48	if ($this->isPrivate()) {
183	40	return $this->getPrivateKey()->getPublicKey();
184		} else {
185		/** @var PublicKeyInterface $key */
186	31	$key = $this->key;
187	31	return $key;
188		}
189		}
190
191		/**
192		* @return HierarchicalKey
193		*/
194	25	public function withoutPrivateKey()
195		{
196	25	$clone = clone $this;
197	25	$clone->key = $clone->getPublicKey();
198	25	return $clone;
199		}
200
201		/**
202		* @param ScriptDataFactory $factory
203		* @return HierarchicalKey
204		*/
205	1	public function withScriptFactory(ScriptDataFactory $factory)
206		{
207	1	$clone = clone $this;
208	1	$clone->scriptDataFactory = $factory;
209	1	return $clone;
210		}
211
212		/**
213		* @return ScriptDataFactory
214		*/
215	28	public function getScriptDataFactory()
216		{
217	28	return $this->scriptDataFactory;
218		}
219
220		/**
221		* @return \BitWasp\Bitcoin\Key\KeyToScript\ScriptAndSignData
222		*/
223	23	public function getScriptAndSignData()
224		{
225	23	if (null === $this->scriptAndSignData) {
226	23	$this->scriptAndSignData = $this->scriptDataFactory->convertKey($this->key);
227		}
228
229	23	return $this->scriptAndSignData;
230		}
231
232		/**
233		* @param BaseAddressCreator $addressCreator
234		* @return \BitWasp\Bitcoin\Address\Address
235		*/
236	17	public function getAddress(BaseAddressCreator $addressCreator)
237		{
238	17	return $this->getScriptAndSignData()->getAddress($addressCreator);
239		}
240
241		/**
242		* Return whether this is a private key
243		*
244		* @return bool
245		*/
246	52	public function isPrivate()
247		{
248	52	return $this->key->isPrivate();
249		}
250
251		/**
252		* Return whether the key is hardened
253		*
254		* @return bool
255		*/
256	2	public function isHardened()
257		{
258	2	return ($this->sequence >> 31) === 1;
259		}
260
261		/**
262		* Create a buffer containing data to be hashed hashed to yield the child offset
263		*
264		* @param int $sequence
265		* @return BufferInterface
266		* @throws \Exception
267		*/
268	43	public function getHmacSeed($sequence)
269		{
270	43	if ($sequence < 0 \|\| $sequence > IntRange::U32_MAX) {
271	6	throw new \InvalidArgumentException("Sequence is outside valid range, must be >= 0 && <= (2^31)-1");
272		}
273
274	37	if (($sequence >> 31) === 1) {
275	34	if ($this->isPrivate() === false) {
276	2	throw new \Exception("Can't derive a hardened key without the private key");
277		}
278
279	32	$buffer = Buffertools::concat(new Buffer("\x00"), $this->getPrivateKey()->getBuffer());
280		} else {
281	35	$buffer = $this->getPublicKey()->getBuffer();
282		}
283
284	35	return (new Parser($buffer))
285	35	->writeBytes(4, Buffer::int($sequence, 4))
286	35	->getBuffer();
287		}
288
289		/**
290		* Derive a child key
291		*
292		* @param int $sequence
293		* @return HierarchicalKey
294		* @throws \Exception
295		*/
296	40	public function deriveChild($sequence)
297		{
298	40	$nextDepth = $this->depth + 1;
299	40	if ($nextDepth > 255) {
300		throw new \InvalidArgumentException('Invalid depth for BIP32 key, cannot exceed 255');
301		}
302
303	40	$hash = Hash::hmac('sha512', $this->getHmacSeed($sequence), $this->chainCode);
304	35	$offset = $hash->slice(0, 32);
305	35	$chain = $hash->slice(32);
306
307	35	if (false === $this->ecAdapter->validatePrivateKey($offset)) {
308	1	return $this->deriveChild($sequence + 1);
309		}
310
311	35	$key = $this->isPrivate() ? $this->getPrivateKey() : $this->getPublicKey();
312	35	$key = $key->tweakAdd($offset->getGmp());
313
314	35	return new HierarchicalKey(
315	35	$this->ecAdapter,
316	35	$this->scriptDataFactory,
317	35	$nextDepth,
318	35	$this->getChildFingerprint(),
319	35	$sequence,
320	35	$chain,
321	35	$key
322		);
323		}
324
325		/**
326		* @param array\|\stdClass\|\Traversable $list
327		* @return HierarchicalKey
328		* @throws \Exception
329		*/
330	30	public function deriveFromList($list)
331		{
332	30	if (!is_array($list) && !$list instanceof \Traversable && !$list instanceof \stdClass) {
333		throw new \InvalidArgumentException('List must be an array or \Traversable');
334		}
335
336	30	$key = $this;
337	30	foreach ($list as $sequence) {
		0 ignored issues – show Bug introduced 2015-11-30 20:43 UTC by Report Bug Copy Issue Report The expression `$list` of type `array\|object<Traversable>\|object<stdClass>` is not guaranteed to be traversable. How about adding an additional type check? There are different options of fixing this problem. If you want to be on the safe side, you can add an additional type-check: $collection = json_decode($data, true); if ( ! is_array($collection)) { throw new \RuntimeException('$collection must be an array.'); } foreach ($collection as $item) { /** ... / } If you are sure that the expression is traversable, you might want to add a doc comment cast* to improve IDE auto-completion and static analysis: /** @var array $collection / $collection = json_decode($data, true); foreach ($collection as $item) { /* .. / } Mark the issue as a false-positive*: Just hover the remove button, in the top-right corner of this issue for more options. Loading history...
338	30	$key = $key->deriveChild($sequence);
339		}
340
341	30	return $key;
342		}
343
344		/**
345		* Decodes a BIP32 path into actual 32bit sequence numbers and derives the child key
346		*
347		* @param string $path
348		* @return HierarchicalKey
349		* @throws \Exception
350		*/
351	30	public function derivePath($path)
352		{
353	30	$sequences = new HierarchicalKeySequence();
354	30	return $this->deriveFromList($sequences->decodePath($path));
355		}
356
357		/**
358		* Serializes the instance according to whether it wraps a private or public key.
359		* @param NetworkInterface $network
360		* @return string
361		*/
362	16	public function toExtendedKey(NetworkInterface $network = null)
363		{
364	16	$network = $network ?: Bitcoin::getNetwork();
365
366	16	$extendedSerializer = new Base58ExtendedKeySerializer(new ExtendedKeySerializer($this->ecAdapter));
367	16	$extended = $extendedSerializer->serialize($network, $this);
368	16	return $extended;
369		}
370
371		/**
372		* Explicitly serialize as a private key. Throws an exception if
373		* the key isn't private.
374		*
375		* @param NetworkInterface $network
376		* @return string
377		*/
378	16	public function toExtendedPrivateKey(NetworkInterface $network = null)
379		{
380	16	if (!$this->isPrivate()) {
381	2	throw new \LogicException('Cannot create extended private key from public');
382		}
383
384	14	return $this->toExtendedKey($network);
385		}
386
387		/**
388		* Explicitly serialize as a public key. This will always work.
389		*
390		* @param NetworkInterface $network
391		* @return string
392		*/
393	13	public function toExtendedPublicKey(NetworkInterface $network = null)
394		{
395	13	return $this->withoutPrivateKey()->toExtendedKey($network);
396		}
397		}
398

Bit-Wasp / bitcoin-php

Pull Request — 0.0.35 (#660)

HierarchicalKey::toPublic() A

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