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<?php |
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namespace Ocsp; |
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use Ocsp\Asn1\Der\Decoder as DerDecoder; |
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use Ocsp\Asn1\Element\Sequence; |
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use Ocsp\Exception\Asn1DecodingException; |
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/** |
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* Class to load and decode certificates in PEM (text) / DER (binary) formats. |
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*/ |
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class CertificateLoader |
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{ |
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/** |
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* The decoder to be used to decode the loaded certificate. |
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* |
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* @var \Ocsp\Asn1\Der\Decoder |
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*/ |
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private $derDecoder; |
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/** |
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* Initialize the instance. |
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*/ |
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public function __construct() |
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{ |
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$this->derDecoder = new DerDecoder(); |
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} |
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/** |
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* Load a certificate from a file. |
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* |
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* @param string $path |
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* |
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* @throws \Ocsp\Exception\Asn1DecodingException |
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* |
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* @return \Ocsp\Asn1\Element\Sequence |
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*/ |
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public function fromFile($path) |
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{ |
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if (!is_string($path) || !is_file($path)) { |
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throw Asn1DecodingException::create(sprintf('Unable to find the file %s', $path)); |
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} |
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if (!is_readable($path)) { |
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throw Asn1DecodingException::create(sprintf('The file %s is not readable', $path)); |
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} |
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$contents = @file_get_contents($path); |
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if ($contents === false) { |
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throw Asn1DecodingException::create(sprintf('Unable to read the file %s', $path)); |
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} |
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return $this->fromString($contents); |
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} |
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/** |
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* Load a certificate from a string. |
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* |
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* @param string $data |
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* |
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* @throws \Ocsp\Exception\Asn1DecodingException |
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* |
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* @return \Ocsp\Asn1\Element\Sequence |
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*/ |
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public function fromString($data) |
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{ |
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$data = (string) $data; |
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if ($data === '') { |
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throw Asn1DecodingException::create('Empty certificate'); |
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} |
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$data = $this->ensureDer($data); |
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$certificate = $this->derDecoder->decodeElement($data); |
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if (!$certificate instanceof Sequence) { |
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throw Asn1DecodingException::create(); |
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} |
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return $certificate; |
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} |
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/** |
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* Convert (if necessary) a PEM-encoded certificate to DER format. |
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* Code from phpseclib, by TerraFrost and other phpseclib contributors (see https://github.com/phpseclib/phpseclib). |
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* |
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* @param string $data |
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* |
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* @return string |
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*/ |
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protected function ensureDer($data) |
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{ |
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$temp = preg_replace('/.*?^-+[^-]+-+[\r\n ]*$/ms', '', $data, 1); |
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$temp = preg_replace('/-+[^-]+-+/', '', $temp); |
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$temp = str_replace(["\r", "\n", ' '], '', $temp); |
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$temp = preg_match('/^[a-zA-Z\d\/+]*={0,2}$/', $temp) ? @base64_decode($temp, true) : false; |
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return $temp ?: $data; |
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} |
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} |
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mlocati /
ocsp
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