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<?php |
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namespace BitWasp\Bitcoin\Crypto\EcAdapter\Impl\Secp256k1\Signature; |
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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\Signature\DerSignatureSerializer; |
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use BitWasp\Bitcoin\Crypto\EcAdapter\Signature\SignatureInterface; |
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use BitWasp\Bitcoin\Serializable; |
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class Signature extends Serializable implements SignatureInterface |
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{ |
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/** |
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* @var \GMP |
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*/ |
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private $r; |
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/** |
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* @var \GMP |
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*/ |
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private $s; |
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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 resource |
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*/ |
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private $secp256k1_sig; |
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/** |
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* @param EcAdapter $adapter |
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* @param \GMP $r |
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* @param \GMP $s |
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* @param resource $secp256k1_ecdsa_signature_t |
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*/ |
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public function __construct(EcAdapter $adapter, \GMP $r, \GMP $s, $secp256k1_ecdsa_signature_t) |
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{ |
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if (!is_resource($secp256k1_ecdsa_signature_t) || |
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!get_resource_type($secp256k1_ecdsa_signature_t) === SECP256K1_TYPE_SIG |
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) { |
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throw new \InvalidArgumentException('Secp256k1\Signature\Signature expects ' . SECP256K1_TYPE_SIG . ' resource'); |
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} |
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$this->secp256k1_sig = $secp256k1_ecdsa_signature_t; |
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$this->ecAdapter = $adapter; |
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$this->r = $r; |
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$this->s = $s; |
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} |
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/** |
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* @return \GMP |
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*/ |
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public function getR() |
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{ |
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return $this->r; |
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} |
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/** |
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* @return \GMP |
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*/ |
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public function getS() |
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{ |
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return $this->s; |
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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->secp256k1_sig; |
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} |
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/** |
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* @param Signature $other |
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* @return bool |
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*/ |
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private function doEquals(Signature $other) |
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{ |
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$a = ''; |
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$b = ''; |
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secp256k1_ecdsa_signature_serialize_der($this->ecAdapter->getContext(), $a, $this->getResource()); |
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secp256k1_ecdsa_signature_serialize_der($this->ecAdapter->getContext(), $b, $other->getResource()); |
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return $a === $b; |
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} |
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/** |
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* @param SignatureInterface $signature |
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* @return bool |
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*/ |
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public function equals(SignatureInterface $signature) |
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{ |
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/** @var Signature $signature */ |
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return $this->doEquals($signature); |
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} |
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/** |
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* @return \BitWasp\Buffertools\BufferInterface |
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*/ |
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public function getBuffer() |
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{ |
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return (new DerSignatureSerializer($this->ecAdapter))->serialize($this); |
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} |
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} |
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Bit-Wasp /
bitcoin-php
Let’s assume that you have a directory layout like this:
. |-- OtherDir | |-- Bar.php | `-- Foo.php `-- SomeDir `-- Foo.phpand let’s assume the following content of
Bar.php:If both files
OtherDir/Foo.phpandSomeDir/Foo.phpare loaded in the same runtime, you will see a PHP error such as the following:PHP Fatal error: Cannot use SomeDir\Foo as Foo because the name is already in use in OtherDir/Foo.phpHowever, as
OtherDir/Foo.phpdoes not necessarily have to be loaded and the error is only triggered if it is loaded beforeOtherDir/Bar.php, this problem might go unnoticed for a while. In order to prevent this error from surfacing, you must import the namespace with a different alias: