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<?php |
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declare(strict_types = 1); |
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namespace Sop\CryptoEncoding; |
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/** |
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* Container for multiple PEM objects. |
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* |
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* The order of PEMs shall be retained, eg. when read from a file. |
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*/ |
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class PEMBundle implements \Countable, \IteratorAggregate |
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{ |
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/** |
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* Array of PEM objects. |
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* |
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* @var PEM[] |
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*/ |
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protected $_pems; |
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/** |
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* Constructor. |
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* |
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* @param PEM ...$pems |
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*/ |
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public function __construct(PEM ...$pems) |
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{ |
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$this->_pems = $pems; |
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} |
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/** |
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* @return string |
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*/ |
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public function __toString(): string |
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{ |
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return $this->string(); |
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} |
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/** |
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* Initialize from a string. |
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* |
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* @param string $str |
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* |
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* @throws \UnexpectedValueException |
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* |
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* @return self |
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*/ |
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public static function fromString(string $str): self |
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{ |
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if (!preg_match_all(PEM::PEM_REGEX, $str, $matches, PREG_SET_ORDER)) { |
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throw new \UnexpectedValueException('No PEM blocks.'); |
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} |
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$pems = array_map( |
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function ($match) { |
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$payload = preg_replace('/\s+/', '', $match[2]); |
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$data = base64_decode($payload, true); |
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if (false === $data) { |
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throw new \UnexpectedValueException( |
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'Failed to decode PEM data.'); |
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} |
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return new PEM($match[1], $data); |
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}, $matches); |
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return new self(...$pems); |
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} |
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/** |
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* Initialize from a file. |
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* |
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* @param string $filename |
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* |
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* @throws \RuntimeException If file reading fails |
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* |
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* @return self |
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*/ |
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public static function fromFile(string $filename): self |
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{ |
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if (!is_readable($filename) || |
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false === ($str = file_get_contents($filename))) { |
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throw new \RuntimeException("Failed to read {$filename}."); |
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} |
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return self::fromString($str); |
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} |
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/** |
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* Get self with PEM objects appended. |
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* |
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* @param PEM ...$pems |
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* |
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* @return self |
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*/ |
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public function withPEMs(PEM ...$pems): self |
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{ |
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$obj = clone $this; |
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$obj->_pems = array_merge($obj->_pems, $pems); |
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return $obj; |
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} |
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/** |
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* Get all PEMs in a bundle. |
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* |
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* @return PEM[] |
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*/ |
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public function all(): array |
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{ |
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return $this->_pems; |
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} |
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/** |
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* Get the first PEM in a bundle. |
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* |
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* @throws \LogicException If bundle contains no PEM objects |
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* |
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* @return PEM |
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*/ |
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public function first(): PEM |
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{ |
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if (!count($this->_pems)) { |
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throw new \LogicException('No PEMs.'); |
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} |
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return $this->_pems[0]; |
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} |
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/** |
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* Get the last PEM in a bundle. |
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* |
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* @throws \LogicException If bundle contains no PEM objects |
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* |
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* @return PEM |
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*/ |
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public function last(): PEM |
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{ |
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if (!count($this->_pems)) { |
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throw new \LogicException('No PEMs.'); |
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} |
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return $this->_pems[count($this->_pems) - 1]; |
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} |
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/** |
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* @see \Countable::count() |
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* |
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* @return int |
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*/ |
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public function count(): int |
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{ |
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return count($this->_pems); |
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} |
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/** |
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* Get iterator for PEMs. |
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* |
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* @see \IteratorAggregate::getIterator() |
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* |
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* @return \ArrayIterator |
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*/ |
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public function getIterator(): \ArrayIterator |
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{ |
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return new \ArrayIterator($this->_pems); |
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} |
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/** |
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* Encode bundle to a string of contiguous PEM blocks. |
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* |
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* @return string |
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*/ |
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public function string(): string |
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{ |
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return implode("\n", |
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array_map( |
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function (PEM $pem) { |
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return $pem->string(); |
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}, $this->_pems)); |
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} |
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} |
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sop /
crypto-encoding
