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<?php |
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declare(strict_types=1); |
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namespace BitWasp\Bitcoin\Crypto\EcAdapter\Impl\Secp256k1\Adapter; |
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use BitWasp\Bitcoin\Crypto\EcAdapter\Adapter\EcAdapterInterface; |
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use BitWasp\Bitcoin\Crypto\EcAdapter\Impl\Secp256k1\Key\PrivateKey; |
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use BitWasp\Bitcoin\Crypto\EcAdapter\Impl\Secp256k1\Key\PublicKey; |
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use BitWasp\Bitcoin\Crypto\EcAdapter\Impl\Secp256k1\Signature\CompactSignature; |
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use BitWasp\Bitcoin\Crypto\EcAdapter\Key\PrivateKeyInterface; |
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use BitWasp\Bitcoin\Crypto\EcAdapter\Key\PublicKeyInterface; |
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use BitWasp\Bitcoin\Crypto\EcAdapter\Signature\CompactSignatureInterface; |
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use BitWasp\Bitcoin\Math\Math; |
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use BitWasp\Buffertools\BufferInterface; |
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use Mdanter\Ecc\Primitives\GeneratorPoint; |
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class EcAdapter implements EcAdapterInterface |
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{ |
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/** |
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* @var Math |
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*/ |
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private $math; |
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/** |
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* @var \GMP |
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*/ |
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private $order; |
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/** |
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* @var GeneratorPoint |
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*/ |
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private $generator; |
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/** |
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* @var resource |
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*/ |
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private $context; |
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/** |
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* @param Math $math |
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* @param GeneratorPoint $generator |
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* @param resource $secp256k1_context_t |
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*/ |
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public function __construct(Math $math, GeneratorPoint $generator, $secp256k1_context_t) |
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{ |
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if (!is_resource($secp256k1_context_t) || !get_resource_type($secp256k1_context_t) === SECP256K1_TYPE_CONTEXT) { |
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throw new \InvalidArgumentException('Secp256k1: Must pass a secp256k1_context_t resource'); |
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} |
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$this->math = $math; |
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$this->generator = $generator; |
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$this->order = $generator->getOrder(); |
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$this->context = $secp256k1_context_t; |
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} |
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/** |
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* @return Math |
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*/ |
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1321 |
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public function getMath(): Math |
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{ |
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return $this->math; |
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} |
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/** |
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* @return \GMP |
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*/ |
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public function getOrder(): \GMP |
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{ |
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return $this->order; |
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} |
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/** |
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* @return GeneratorPoint |
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*/ |
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public function getGenerator() |
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{ |
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return $this->generator; |
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} |
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/** |
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* @param BufferInterface $privateKey |
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* @return bool |
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*/ |
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public function validatePrivateKey(BufferInterface $privateKey): bool |
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{ |
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return (bool) secp256k1_ec_seckey_verify($this->context, $privateKey->getBinary()); |
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} |
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/** |
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* @param \GMP $element |
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* @param bool $half |
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* @return bool |
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*/ |
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public function validateSignatureElement(\GMP $element, bool $half = false): bool |
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{ |
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$math = $this->getMath(); |
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$against = $this->getOrder(); |
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if ($half) { |
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$against = $math->rightShift($against, 1); |
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} |
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return $math->cmp($element, $against) < 0 && $math->cmp($element, gmp_init(0)) !== 0; |
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} |
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/** |
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* @param \GMP $int |
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* @param bool $compressed |
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* @return PrivateKeyInterface |
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*/ |
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public function getPrivateKey(\GMP $int, bool $compressed = false): PrivateKeyInterface |
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{ |
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return new PrivateKey($this, $int, $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 getContext() |
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{ |
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return $this->context; |
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} |
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/** |
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* @param BufferInterface $msg32 |
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* @param CompactSignature $compactSig |
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* @return PublicKey |
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*/ |
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private function doRecover(BufferInterface $msg32, CompactSignature $compactSig): PublicKey |
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{ |
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$publicKey = ''; |
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/** @var resource $publicKey */ |
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$context = $this->context; |
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$sig = $compactSig->getResource(); |
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if (1 !== secp256k1_ecdsa_recover($context, $publicKey, $sig, $msg32->getBinary())) { |
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throw new \RuntimeException('Unable to recover Public Key'); |
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} |
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return new PublicKey($this, $publicKey, $compactSig->isCompressed()); |
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} |
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/** |
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* @param BufferInterface $msg32 |
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* @param CompactSignatureInterface $compactSig |
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* @return PublicKeyInterface |
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*/ |
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public function recover(BufferInterface $msg32, CompactSignatureInterface $compactSig): PublicKeyInterface |
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{ |
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/** @var CompactSignature $compactSig */ |
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return $this->doRecover($msg32, $compactSig); |
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} |
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} |
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Bit-Wasp /
bitcoin-php
