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<?php |
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namespace BitWasp\Bitcoin\Crypto\EcAdapter\Impl\PhpEcc\Key; |
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use BitWasp\Bitcoin\Crypto\EcAdapter\Impl\PhpEcc\Adapter\EcAdapter; |
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use BitWasp\Bitcoin\Crypto\EcAdapter\Impl\PhpEcc\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\Buffer; |
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use BitWasp\Buffertools\BufferInterface; |
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use Mdanter\Ecc\Primitives\PointInterface; |
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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 PointInterface |
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*/ |
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private $point; |
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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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* @param EcAdapter $ecAdapter |
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* @param PointInterface $point |
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* @param bool $compressed |
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*/ |
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public function __construct( |
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EcAdapter $ecAdapter, |
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PointInterface $point, |
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$compressed = false |
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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->point = $point; |
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$this->compressed = $compressed; |
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} |
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/** |
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* @return PointInterface |
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*/ |
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public function getPoint() |
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{ |
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return $this->point; |
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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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* @param \GMP $tweak |
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* @return PublicKeyInterface |
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*/ |
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public function tweakAdd(\GMP $tweak) |
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{ |
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$offset = $this->ecAdapter->getGenerator()->mul($tweak); |
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$newPoint = $this->point->add($offset); |
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return $this->ecAdapter->getPublicKey($newPoint, $this->compressed); |
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} |
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/** |
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* @param \GMP $tweak |
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* @return PublicKeyInterface |
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*/ |
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public function tweakMul(\GMP $tweak) |
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{ |
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$point = $this->point->mul($tweak); |
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return $this->ecAdapter->getPublicKey($point, $this->compressed); |
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} |
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/** |
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* @param BufferInterface $publicKey |
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* @return bool |
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*/ |
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public static function isCompressedOrUncompressed(BufferInterface $publicKey) |
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{ |
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$vchPubKey = $publicKey->getBinary(); |
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if ($publicKey->getSize() < 33) { |
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return false; |
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} |
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if (ord($vchPubKey[0]) === 0x04) { |
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if ($publicKey->getSize() !== 65) { |
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// Invalid length for uncompressed key |
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return false; |
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} |
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} elseif (in_array($vchPubKey[0], array( |
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hex2bin(self::KEY_COMPRESSED_EVEN), |
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hex2bin(self::KEY_COMPRESSED_ODD)))) { |
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if ($publicKey->getSize() !== 33) { |
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return false; |
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} |
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} else { |
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return false; |
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} |
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return true; |
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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() |
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{ |
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return $this->compressed; |
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} |
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/** |
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* @return BufferInterface |
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*/ |
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public function getBuffer() |
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{ |
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return (new PublicKeySerializer($this->ecAdapter))->serialize($this); |
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} |
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} |
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Bit-Wasp /
bitcoin-php
