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<?php |
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declare(strict_types = 1); |
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namespace Sop\CryptoTypes\Signature; |
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use Sop\ASN1\Type\Constructed\Sequence; |
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use Sop\ASN1\Type\Primitive\BitString; |
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use Sop\ASN1\Type\Primitive\Integer; |
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use Sop\ASN1\Type\UnspecifiedType; |
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/** |
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* Implements ECDSA signature value. |
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* |
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* ECDSA signature is represented as a `ECDSA-Sig-Value` ASN.1 type. |
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* |
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* @see https://tools.ietf.org/html/rfc3278#section-8.2 |
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*/ |
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class ECSignature extends Signature |
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{ |
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/** |
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* r-value as a base 10 integer. |
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* |
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* @var string |
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*/ |
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protected $_r; |
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/** |
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* s-value as a base 10 integer. |
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* |
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* @var string |
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*/ |
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protected $_s; |
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/** |
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* Constructor. |
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* |
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* @param int|string $r Signature's `r` value |
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* @param int|string $s Signature's `s` value |
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*/ |
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public function __construct($r, $s) |
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{ |
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$this->_r = strval($r); |
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$this->_s = strval($s); |
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} |
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/** |
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* Initialize from ASN.1. |
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* |
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* @param Sequence $seq |
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* |
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* @return self |
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*/ |
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public static function fromASN1(Sequence $seq): self |
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{ |
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$r = $seq->at(0)->asInteger()->number(); |
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$s = $seq->at(1)->asInteger()->number(); |
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return new self($r, $s); |
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} |
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/** |
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* Initialize from DER. |
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* |
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* @param string $data |
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* |
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* @return self |
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*/ |
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public static function fromDER(string $data): self |
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{ |
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return self::fromASN1(UnspecifiedType::fromDER($data)->asSequence()); |
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} |
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/** |
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* Get the r-value. |
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* |
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* @return string Base 10 integer string |
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*/ |
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public function r(): string |
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{ |
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return $this->_r; |
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} |
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/** |
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* Get the s-value. |
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* |
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* @return string Base 10 integer string |
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*/ |
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public function s(): string |
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{ |
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return $this->_s; |
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} |
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/** |
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* Generate ASN.1 structure. |
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* |
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* @return Sequence |
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*/ |
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public function toASN1(): Sequence |
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{ |
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return new Sequence(new Integer($this->_r), new Integer($this->_s)); |
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} |
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/** |
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* Get DER encoding of the signature. |
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* |
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* @return string |
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*/ |
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public function toDER(): string |
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{ |
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return $this->toASN1()->toDER(); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function bitString(): BitString |
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{ |
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return new BitString($this->toDER()); |
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} |
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} |
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sop /
crypto-types
