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<?php |
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declare(strict_types=1); |
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namespace Genkgo\Mail\Dkim; |
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use Genkgo\Mail\Header\HeaderName; |
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use Genkgo\Mail\Header\HeaderValue; |
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use Genkgo\Mail\Header\HeaderValueParameter; |
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use Genkgo\Mail\HeaderInterface; |
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use Genkgo\Mail\MessageInterface; |
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final class HeaderV1Factory |
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{ |
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public const HEADER_NAME = 'DKIM-Signature'; |
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/** |
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* @var array |
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*/ |
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private const HEADERS_IGNORED = [ |
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'return-path' => true, |
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'received' => true, |
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'comments' => true, |
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'keywords' => true, |
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'bcc' => true, |
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'resent-bcc' => true, |
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]; |
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/** |
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* @var SignInterface |
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*/ |
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private $sign; |
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/** |
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* @var CanonicalizeHeaderInterface |
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*/ |
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private $canonicalizeHeader; |
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/** |
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* @var CanonicalizeBodyInterface |
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*/ |
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private $canonicalizeBody; |
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/** |
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* @param SignInterface $sign |
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* @param CanonicalizeHeaderInterface $canonicalizeHeader |
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* @param CanonicalizeBodyInterface $canonicalizeBody |
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*/ |
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public function __construct( |
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SignInterface $sign, |
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CanonicalizeHeaderInterface $canonicalizeHeader, |
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CanonicalizeBodyInterface $canonicalizeBody |
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) { |
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$this->sign = $sign; |
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$this->canonicalizeHeader = $canonicalizeHeader; |
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$this->canonicalizeBody = $canonicalizeBody; |
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} |
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/** |
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* @param MessageInterface $message |
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* @param Parameters $parameters |
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* @return HeaderInterface |
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*/ |
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public function factory( |
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MessageInterface $message, |
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Parameters $parameters |
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): HeaderInterface { |
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$headerCanonicalized = []; |
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$headerNames = []; |
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foreach ($message->getHeaders() as $headers) { |
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/** @var HeaderInterface $header */ |
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foreach ($headers as $header) { |
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$headerName = \strtolower((string)$header->getName()); |
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if (isset(self::HEADERS_IGNORED[$headerName])) { |
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break; |
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} |
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// make sure we sign only the last header in the list |
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$headerCanonicalized[$headerName] = $this->canonicalizeHeader->canonicalize($header); |
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$headerNames[$headerName] = (string)$header->getName(); |
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} |
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} |
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$bodyHash = $this->sign->hashBody( |
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$this->canonicalizeBody->canonicalize($message->getBody()) |
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); |
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$canonicalization = [$this->canonicalizeHeader->name(), $this->canonicalizeBody->name()]; |
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$headerValue = $parameters->newHeaderValue() |
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->withParameter($this->newUnquotedParameter('a', $this->sign->name())) |
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->withParameter($this->newUnquotedParameter('c', \implode('/', $canonicalization))) |
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->withParameter($this->newUnquotedParameter('h', \implode(':', $headerNames)), true) |
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->withParameter($this->newUnquotedParameter('bh', \base64_encode($bodyHash)), true) |
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->withParameter($this->newUnquotedParameter('b', ''), true); |
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$headerCanonicalized[\strtolower(self::HEADER_NAME)] = $this->canonicalizeHeader->canonicalize( |
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$this->newHeader($headerValue) |
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); |
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$headers = \implode("\r\n", $headerCanonicalized); |
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$signature = \base64_encode($this->sign->signHeaders($headers)); |
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$headerValue = $headerValue->withParameter(new HeaderValueParameter('b', $signature), true); |
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return $this->newHeader($headerValue); |
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} |
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/** |
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* @param string $name |
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* @param string $value |
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* @return HeaderValueParameter |
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*/ |
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private function newUnquotedParameter(string $name, string $value): HeaderValueParameter |
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{ |
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return (new HeaderValueParameter($name, $value))->withSpecials(''); |
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} |
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/** |
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* @param HeaderValue $headerValue |
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* @return HeaderInterface |
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*/ |
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private function newHeader(HeaderValue $headerValue): HeaderInterface |
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{ |
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return new class($headerValue) implements HeaderInterface { |
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/** |
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* @var HeaderValue |
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*/ |
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private $headerValue; |
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/** |
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* @param HeaderValue $headerValue |
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*/ |
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public function __construct(HeaderValue $headerValue) |
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{ |
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$this->headerValue = $headerValue; |
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} |
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/** |
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* @return HeaderName |
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*/ |
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public function getName(): HeaderName |
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{ |
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return new HeaderName(HeaderV1Factory::HEADER_NAME); |
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} |
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/** |
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* @return HeaderValue |
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*/ |
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public function getValue(): HeaderValue |
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{ |
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return $this->headerValue; |
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} |
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}; |
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} |
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} |
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genkgo /
mail
