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<?php |
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namespace X509\Certificate; |
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use CryptoUtil\PEM\PEM; |
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use CryptoUtil\PEM\PEMBundle; |
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use X509\CertificationPath\CertificationPath; |
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/** |
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* Ordered list of certificates from the end-entity to the trust anchor. |
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*/ |
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class CertificateChain implements \Countable, \IteratorAggregate |
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{ |
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/** |
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* List of certificates in a chain. |
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* |
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* @var Certificate[] |
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*/ |
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protected $_certs; |
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/** |
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* Constructor. |
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* |
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* @param Certificate ...$certs List of certificates, end-entity first |
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*/ |
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public function __construct(Certificate ...$certs) { |
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$this->_certs = $certs; |
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} |
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/** |
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* Initialize from a list of PEMs. |
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* |
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* @param PEM ...$pems |
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* @return self |
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*/ |
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public static function fromPEMs(PEM ...$pems) { |
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$certs = array_map( |
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function (PEM $pem) { |
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return Certificate::fromPEM($pem); |
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}, $pems); |
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return new self(...$certs); |
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} |
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/** |
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* Initialize from a string containing multiple PEM blocks. |
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* |
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* @param string $str |
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* @return self |
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*/ |
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public static function fromPEMString($str) { |
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$pems = PEMBundle::fromString($str)->all(); |
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return self::fromPEMs(...$pems); |
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} |
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/** |
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* Get all certificates in a chain ordered from the end-entity certificate |
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* to the trust anchor. |
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* |
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* @return Certificate[] |
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*/ |
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public function certificates() { |
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return $this->_certs; |
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} |
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/** |
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* Get the end-entity certificate. |
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* |
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* @throws \LogicException |
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* @return Certificate |
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*/ |
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public function endEntityCertificate() { |
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if (!count($this->_certs)) { |
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throw new \LogicException("No certificates."); |
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} |
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return $this->_certs[0]; |
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} |
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/** |
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* Get the trust anchor certificate. |
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* |
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* @throws \LogicException |
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* @return Certificate |
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*/ |
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public function trustAnchorCertificate() { |
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if (!count($this->_certs)) { |
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throw new \LogicException("No certificates."); |
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} |
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return $this->_certs[count($this->_certs) - 1]; |
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} |
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/** |
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* Convert certificate chain to certification path. |
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* |
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* @return CertificationPath |
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*/ |
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public function certificationPath() { |
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return CertificationPath::fromCertificateChain($this); |
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} |
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/** |
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* Convert certificate chain to string of PEM blocks. |
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* |
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* @return string |
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*/ |
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public function toPEMString() { |
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return implode("\n", |
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array_map( |
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function (Certificate $cert) { |
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return $cert->toPEM()->string(); |
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}, $this->_certs)); |
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} |
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/** |
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* |
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* @see Countable::count() |
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* @return int |
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*/ |
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public function count() { |
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return count($this->_certs); |
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} |
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/** |
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* Get iterator for certificates. |
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* |
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* @see IteratorAggregate::getIterator() |
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* @return \ArrayIterator |
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*/ |
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public function getIterator() { |
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return new \ArrayIterator($this->_certs); |
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} |
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} |
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sop /
x509
