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<?php |
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declare(strict_types=1); |
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namespace BitWasp\Bitcoin\Crypto\EcAdapter\Impl\Secp256k1\Key; |
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use BitWasp\Bitcoin\Bitcoin; |
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use BitWasp\Bitcoin\Crypto\EcAdapter\Impl\Secp256k1\Adapter\EcAdapter; |
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use BitWasp\Bitcoin\Crypto\EcAdapter\Impl\Secp256k1\Serializer\Key\PrivateKeySerializer; |
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use BitWasp\Bitcoin\Crypto\EcAdapter\Impl\Secp256k1\Signature\Signature; |
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use BitWasp\Bitcoin\Crypto\EcAdapter\Key\Key; |
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use BitWasp\Bitcoin\Crypto\EcAdapter\Key\KeyInterface; |
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use BitWasp\Bitcoin\Crypto\EcAdapter\Key\PrivateKeyInterface; |
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use BitWasp\Bitcoin\Crypto\Random\RbgInterface; |
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use BitWasp\Bitcoin\Exceptions\InvalidPrivateKey; |
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use BitWasp\Bitcoin\Network\NetworkInterface; |
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use BitWasp\Bitcoin\Serializer\Key\PrivateKey\WifPrivateKeySerializer; |
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use BitWasp\Buffertools\Buffer; |
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use BitWasp\Buffertools\BufferInterface; |
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class PrivateKey extends Key implements PrivateKeyInterface |
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{ |
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/** |
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* @var \GMP |
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*/ |
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private $secret; |
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/** |
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* @var string |
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*/ |
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private $secretBin; |
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/** |
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* @var bool |
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*/ |
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private $compressed; |
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/** |
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* @var PublicKey |
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*/ |
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private $publicKey; |
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/** |
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* @var EcAdapter |
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*/ |
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private $ecAdapter; |
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/** |
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* @param EcAdapter $adapter |
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* @param \GMP $secret |
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* @param bool|false $compressed |
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* @throws \Exception |
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*/ |
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public function __construct(EcAdapter $adapter, \GMP $secret, bool $compressed = false) |
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{ |
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$buffer = Buffer::int(gmp_strval($secret, 10), 32, $adapter->getMath()); |
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if (!$adapter->validatePrivateKey($buffer)) { |
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throw new InvalidPrivateKey('Invalid private key'); |
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} |
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if (false === is_bool($compressed)) { |
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throw new \InvalidArgumentException('PrivateKey: Compressed argument must be a boolean'); |
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} |
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$this->ecAdapter = $adapter; |
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$this->secret = $secret; |
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$this->secretBin = $buffer->getBinary(); |
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$this->compressed = $compressed; |
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} |
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/** |
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* @param BufferInterface $msg32 |
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* @param RbgInterface|null $rbgInterface |
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* @return Signature |
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*/ |
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public function sign(BufferInterface $msg32, RbgInterface $rbgInterface = null): Signature |
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{ |
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return $this->ecAdapter->sign($msg32, $this, $rbgInterface); |
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} |
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/** |
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* @return bool |
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*/ |
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public function isCompressed(): bool |
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{ |
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return $this->compressed; |
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} |
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/** |
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* @return \GMP |
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*/ |
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public function getSecret() |
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{ |
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return $this->secret; |
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} |
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/** |
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* @return string |
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*/ |
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public function getSecretBinary(): string |
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{ |
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return $this->secretBin; |
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} |
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/** |
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* @return PublicKey |
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*/ |
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public function getPublicKey() |
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{ |
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if (null === $this->publicKey) { |
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$context = $this->ecAdapter->getContext(); |
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$publicKey_t = ''; |
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/** @var resource $publicKey_t */ |
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if (1 !== secp256k1_ec_pubkey_create($context, $publicKey_t, $this->getBinary())) { |
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throw new \RuntimeException('Failed to create public key'); |
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} |
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$this->publicKey = new PublicKey($this->ecAdapter, $publicKey_t, $this->compressed); |
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} |
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return $this->publicKey; |
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} |
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/** |
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* @param \GMP $tweak |
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* @return KeyInterface |
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*/ |
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public function tweakAdd(\GMP $tweak): KeyInterface |
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{ |
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$adapter = $this->ecAdapter; |
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$math = $adapter->getMath(); |
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$context = $adapter->getContext(); |
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$privateKey = $this->getBinary(); // mod by reference |
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$tweak = Buffer::int($math->toString($tweak), 32, $math)->getBinary(); |
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$ret = \secp256k1_ec_privkey_tweak_add( |
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$context, |
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$privateKey, |
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$tweak |
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); |
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if ($ret !== 1) { |
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throw new \RuntimeException('Secp256k1 privkey tweak add: failed'); |
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} |
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$secret = new Buffer($privateKey); |
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return $adapter->getPrivateKey($secret->getGmp(), $this->compressed); |
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} |
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/** |
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* @param \GMP $tweak |
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* @return KeyInterface |
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*/ |
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public function tweakMul(\GMP $tweak): KeyInterface |
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{ |
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$privateKey = $this->getBinary(); |
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$math = $this->ecAdapter->getMath(); |
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$tweak = Buffer::int($math->toString($tweak), 32, $math)->getBinary(); |
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$ret = \secp256k1_ec_privkey_tweak_mul( |
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$this->ecAdapter->getContext(), |
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$privateKey, |
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$tweak |
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); |
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1 |
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if ($ret !== 1) { |
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throw new \RuntimeException('Secp256k1 privkey tweak mul: failed'); |
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} |
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$secret = new Buffer($privateKey); |
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return $this->ecAdapter->getPrivateKey($secret->getGmp(), $this->compressed); |
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} |
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/** |
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* @param NetworkInterface $network |
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* @return string |
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*/ |
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public function toWif(NetworkInterface $network = null): string |
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{ |
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$network = $network ?: Bitcoin::getNetwork(); |
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$wifSerializer = new WifPrivateKeySerializer($this->ecAdapter, new PrivateKeySerializer($this->ecAdapter)); |
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return $wifSerializer->serialize($network, $this); |
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} |
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/** |
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* @return BufferInterface |
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*/ |
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public function getBuffer(): BufferInterface |
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{ |
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return (new PrivateKeySerializer($this->ecAdapter))->serialize($this); |
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} |
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} |
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Bit-Wasp /
bitcoin-php
