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<?php |
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namespace BitWasp\Bitcoin\Crypto\EcAdapter\Impl\Secp256k1\Key; |
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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\PublicKeySerializer; |
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use BitWasp\Bitcoin\Crypto\EcAdapter\Key\Key; |
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use BitWasp\Bitcoin\Crypto\EcAdapter\Key\PublicKeyInterface; |
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use BitWasp\Bitcoin\Crypto\EcAdapter\Signature\SignatureInterface; |
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use BitWasp\Buffertools\BufferInterface; |
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class PublicKey extends Key implements PublicKeyInterface |
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{ |
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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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* @var bool|false |
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*/ |
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private $compressed; |
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/** |
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* @var resource |
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*/ |
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private $pubkey_t; |
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/** |
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* @param EcAdapter $ecAdapter |
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* @param resource $secp256k1_pubkey_t |
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* @param bool|false $compressed |
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*/ |
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public function __construct(EcAdapter $ecAdapter, $secp256k1_pubkey_t, $compressed = false) |
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{ |
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if (!is_resource($secp256k1_pubkey_t) || |
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!get_resource_type($secp256k1_pubkey_t) === SECP256K1_TYPE_PUBKEY) { |
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throw new \InvalidArgumentException('Secp256k1\Key\PublicKey expects ' . SECP256K1_TYPE_PUBKEY . ' resource'); |
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} |
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if (false === is_bool($compressed)) { |
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throw new \InvalidArgumentException('PublicKey: Compressed must be a boolean'); |
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} |
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$this->ecAdapter = $ecAdapter; |
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$this->pubkey_t = $secp256k1_pubkey_t; |
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$this->compressed = $compressed; |
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} |
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/** |
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* @param BufferInterface $msg32 |
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* @param SignatureInterface $signature |
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* @return bool |
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*/ |
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public function verify(BufferInterface $msg32, SignatureInterface $signature) |
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{ |
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return $this->ecAdapter->verify($msg32, $this, $signature); |
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} |
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/** |
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* @return bool|false |
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*/ |
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public function isCompressed() |
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{ |
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return $this->compressed; |
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} |
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/** |
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* @return resource |
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*/ |
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public function getResource() |
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{ |
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return $this->pubkey_t; |
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} |
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/** |
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* @return resource |
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* @throws \Exception |
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*/ |
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private function clonePubkey() |
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{ |
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$context = $this->ecAdapter->getContext(); |
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$serialized = ''; |
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if (1 !== secp256k1_ec_pubkey_serialize($context, $serialized, $this->pubkey_t, $this->compressed)) { |
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throw new \Exception('Secp256k1: pubkey serialize'); |
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} |
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/** @var resource $clone */ |
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$clone = ''; |
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if (1 !== secp256k1_ec_pubkey_parse($context, $clone, $serialized)) { |
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throw new \Exception('Secp256k1 pubkey parse'); |
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} |
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return $clone; |
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} |
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/** |
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* @param int $tweak |
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* @return PublicKey |
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* @throws \Exception |
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*/ |
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public function tweakAdd($tweak) |
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{ |
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$context = $this->ecAdapter->getContext(); |
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$math = $this->ecAdapter->getMath(); |
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$bin = pack('H*', str_pad($math->decHex($tweak), 64, '0', STR_PAD_LEFT)); |
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$clone = $this->clonePubkey(); |
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if (1 !== secp256k1_ec_pubkey_tweak_add($context, $clone, $bin)) { |
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throw new \RuntimeException('Secp256k1: tweak add failed.'); |
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} |
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return new PublicKey($this->ecAdapter, $clone, $this->compressed); |
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} |
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/** |
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* @param int $tweak |
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* @return PublicKey |
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* @throws \Exception |
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*/ |
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public function tweakMul($tweak) |
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{ |
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$context = $this->ecAdapter->getContext(); |
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$math = $this->ecAdapter->getMath(); |
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$bin = pack('H*', str_pad($math->decHex($tweak), 64, '0', STR_PAD_LEFT)); |
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$clone = $this->clonePubkey(); |
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if (1 !== secp256k1_ec_pubkey_tweak_mul($context, $clone, $bin)) { |
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throw new \RuntimeException('Secp256k1: tweak mul failed.'); |
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} |
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return new PublicKey($this->ecAdapter, $clone, $this->compressed); |
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} |
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/** |
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* @return BufferInterface |
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*/ |
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public function getBuffer() |
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{ |
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return (new PublicKeySerializer($this->ecAdapter))->serialize($this); |
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} |
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} |
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Bit-Wasp /
bitcoin-php
