HierarchicalKey::toPublic() - Code Metrics - Inspection of "[0.0.35] HierarchicalKey: add getAddress and getSc..." - Bit-Wasp/bitcoin-php - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — 0.0.35 (#660)

by thomas

created 2018-03-10 13:02 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;
        $clone->scriptAndSignData = null; // we cache, don't forget to clear
        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	$clone->scriptAndSignData = null; // we cache, don't forget to clear
210	1	return $clone;
211		}
212
213		/**
214		* @return ScriptDataFactory
215		*/
216	28	public function getScriptDataFactory()
217		{
218	28	return $this->scriptDataFactory;
219		}
220
221		/**
222		* @return \BitWasp\Bitcoin\Key\KeyToScript\ScriptAndSignData
223		*/
224	23	public function getScriptAndSignData()
225		{
226	23	if (null === $this->scriptAndSignData) {
227	23	$this->scriptAndSignData = $this->scriptDataFactory->convertKey($this->key);
228		}
229
230	23	return $this->scriptAndSignData;
231		}
232
233		/**
234		* @param BaseAddressCreator $addressCreator
235		* @return \BitWasp\Bitcoin\Address\Address
236		*/
237	17	public function getAddress(BaseAddressCreator $addressCreator)
238		{
239	17	return $this->getScriptAndSignData()->getAddress($addressCreator);
240		}
241
242		/**
243		* Return whether this is a private key
244		*
245		* @return bool
246		*/
247	52	public function isPrivate()
248		{
249	52	return $this->key->isPrivate();
250		}
251
252		/**
253		* Return whether the key is hardened
254		*
255		* @return bool
256		*/
257	2	public function isHardened()
258		{
259	2	return ($this->sequence >> 31) === 1;
260		}
261
262		/**
263		* Create a buffer containing data to be hashed hashed to yield the child offset
264		*
265		* @param int $sequence
266		* @return BufferInterface
267		* @throws \Exception
268		*/
269	43	public function getHmacSeed($sequence)
270		{
271	43	if ($sequence < 0 \|\| $sequence > IntRange::U32_MAX) {
272	6	throw new \InvalidArgumentException("Sequence is outside valid range, must be >= 0 && <= (2^31)-1");
273		}
274
275	37	if (($sequence >> 31) === 1) {
276	34	if ($this->isPrivate() === false) {
277	2	throw new \Exception("Can't derive a hardened key without the private key");
278		}
279
280	32	$buffer = Buffertools::concat(new Buffer("\x00"), $this->getPrivateKey()->getBuffer());
281		} else {
282	35	$buffer = $this->getPublicKey()->getBuffer();
283		}
284
285	35	return (new Parser($buffer))
286	35	->writeBytes(4, Buffer::int($sequence, 4))
287	35	->getBuffer();
288		}
289
290		/**
291		* Derive a child key
292		*
293		* @param int $sequence
294		* @return HierarchicalKey
295		* @throws \Exception
296		*/
297	40	public function deriveChild($sequence)
298		{
299	40	$nextDepth = $this->depth + 1;
300	40	if ($nextDepth > 255) {
301		throw new \InvalidArgumentException('Invalid depth for BIP32 key, cannot exceed 255');
302		}
303
304	40	$hash = Hash::hmac('sha512', $this->getHmacSeed($sequence), $this->chainCode);
305	35	$offset = $hash->slice(0, 32);
306	35	$chain = $hash->slice(32);
307
308	35	if (false === $this->ecAdapter->validatePrivateKey($offset)) {
309	1	return $this->deriveChild($sequence + 1);
310		}
311
312	35	$key = $this->isPrivate() ? $this->getPrivateKey() : $this->getPublicKey();
313	35	$key = $key->tweakAdd($offset->getGmp());
314
315	35	return new HierarchicalKey(
316	35	$this->ecAdapter,
317	35	$this->scriptDataFactory,
318	35	$nextDepth,
319	35	$this->getChildFingerprint(),
320	35	$sequence,
321	35	$chain,
322	35	$key
323		);
324		}
325
326		/**
327		* @param array\|\stdClass\|\Traversable $list
328		* @return HierarchicalKey
329		* @throws \Exception
330		*/
331	30	public function deriveFromList($list)
332		{
333	30	if (!is_array($list) && !$list instanceof \Traversable && !$list instanceof \stdClass) {
334		throw new \InvalidArgumentException('List must be an array or \Traversable');
335		}
336
337	30	$key = $this;
338	30	foreach ($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...
339	30	$key = $key->deriveChild($sequence);
340		}
341
342	30	return $key;
343		}
344
345		/**
346		* Decodes a BIP32 path into actual 32bit sequence numbers and derives the child key
347		*
348		* @param string $path
349		* @return HierarchicalKey
350		* @throws \Exception
351		*/
352	30	public function derivePath($path)
353		{
354	30	$sequences = new HierarchicalKeySequence();
355	30	return $this->deriveFromList($sequences->decodePath($path));
356		}
357
358		/**
359		* Serializes the instance according to whether it wraps a private or public key.
360		* @param NetworkInterface $network
361		* @return string
362		*/
363	16	public function toExtendedKey(NetworkInterface $network = null)
364		{
365	16	$network = $network ?: Bitcoin::getNetwork();
366
367	16	$extendedSerializer = new Base58ExtendedKeySerializer(new ExtendedKeySerializer($this->ecAdapter));
368	16	$extended = $extendedSerializer->serialize($network, $this);
369	16	return $extended;
370		}
371
372		/**
373		* Explicitly serialize as a private key. Throws an exception if
374		* the key isn't private.
375		*
376		* @param NetworkInterface $network
377		* @return string
378		*/
379	16	public function toExtendedPrivateKey(NetworkInterface $network = null)
380		{
381	16	if (!$this->isPrivate()) {
382	2	throw new \LogicException('Cannot create extended private key from public');
383		}
384
385	14	return $this->toExtendedKey($network);
386		}
387
388		/**
389		* Explicitly serialize as a public key. This will always work.
390		*
391		* @param NetworkInterface $network
392		* @return string
393		*/
394	13	public function toExtendedPublicKey(NetworkInterface $network = null)
395		{
396	13	return $this->withoutPrivateKey()->toExtendedKey($network);
397		}
398		}
399

Bit-Wasp / bitcoin-php

Pull Request — 0.0.35 (#660)

HierarchicalKey::toPublic() A

Complexity

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Duplication

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Duplication Side-by-Side

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