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<?php |
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declare(strict_types=1); |
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namespace IonBazan\AliyunSigner; |
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use DateTime; |
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use DateTimeInterface; |
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use DateTimeZone; |
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use IonBazan\AliyunSigner\Digest\DigestInterface; |
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use IonBazan\AliyunSigner\Digest\HmacSHA256Digest; |
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use Psr\Http\Message\RequestInterface; |
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use Ramsey\Uuid\Uuid; |
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use function sprintf; |
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class RequestSigner |
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{ |
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public const HEADER_X_CA_SIGNATURE = 'X-Ca-Signature'; |
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public const HEADER_X_CA_SIGNATURE_METHOD = 'X-Ca-Signature-Method'; |
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public const HEADER_X_CA_SIGNATURE_HEADERS = 'X-Ca-Signature-Headers'; |
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public const HEADER_X_CA_TIMESTAMP = 'X-Ca-Timestamp'; |
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public const HEADER_X_CA_NONCE = 'X-Ca-Nonce'; |
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public const HEADER_X_CA_KEY = 'X-Ca-Key'; |
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public const HEADER_X_CA_STAGE = 'X-Ca-Stage'; |
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public const HEADER_DATE = 'Date'; |
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public const HEADER_CONTENT_MD5 = 'Content-MD5'; |
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private array $signatureHeaders = [ |
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self::HEADER_X_CA_KEY, |
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self::HEADER_X_CA_NONCE, |
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self::HEADER_X_CA_SIGNATURE_METHOD, |
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self::HEADER_X_CA_TIMESTAMP, |
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self::HEADER_X_CA_STAGE, |
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]; |
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public function __construct(private readonly Key $key, private readonly DigestInterface $digest = new HmacSHA256Digest()) |
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{ |
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} |
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public function signRequest(RequestInterface $request, ?DateTimeInterface $date = null, ?string $nonce = null): RequestInterface |
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{ |
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$nonce ??= Uuid::uuid4()->toString(); |
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$date = DateTime::createFromInterface($date ?? new DateTime())->setTimezone(new DateTimeZone('UTC')); |
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$timeString = $date->format(DATE_RFC7231); |
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$body = $request->getBody()->getContents(); |
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$contentMd5 = $body !== '' ? base64_encode(md5($body, true)) : ''; |
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$request = $request->withHeader(self::HEADER_DATE, $timeString) |
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->withHeader(self::HEADER_CONTENT_MD5, $contentMd5) |
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->withHeader(self::HEADER_X_CA_SIGNATURE_METHOD, $this->digest->getMethod()) |
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->withHeader(self::HEADER_X_CA_TIMESTAMP, $date->format('Uv')) |
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->withHeader(self::HEADER_X_CA_KEY, $this->key->id) |
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->withHeader(self::HEADER_X_CA_NONCE, $nonce); |
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$headers = $this->getHeadersToSign($request); |
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$textToSign = implode("\n", [ |
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strtoupper($request->getMethod()), |
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$request->getHeaderLine('accept'), |
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$contentMd5, |
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$request->getHeaderLine('content-type'), |
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$timeString, |
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implode("\n", $headers), |
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$this->getUrlToSign($request), |
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]); |
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$signature = $this->digest->sign($textToSign, $this->key->secret); |
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return $request->withHeader(self::HEADER_X_CA_SIGNATURE, $signature) |
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->withHeader(self::HEADER_X_CA_SIGNATURE_HEADERS, implode(',', array_keys($headers))); |
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} |
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/** |
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* @param string[] $headers |
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*/ |
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public function setSignatureHeaders(array $headers): void |
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{ |
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$this->signatureHeaders = $headers; |
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} |
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public function addSignatureHeader(string $header): void |
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{ |
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$this->signatureHeaders[] = $header; |
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} |
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protected function getUrlToSign(RequestInterface $request): string |
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{ |
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$query = urldecode($request->getUri()->getQuery()); |
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return $request->getUri()->getPath().($query !== '' ? '?'.$query : ''); |
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} |
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protected function getHeadersToSign(RequestInterface $request): array |
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{ |
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$headersToSign = []; |
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foreach ($this->signatureHeaders as $headerName) { |
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$headerName = strtolower($headerName); |
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if ($request->hasHeader($headerName)) { |
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$headersToSign[$headerName] = sprintf('%s:%s', $headerName, $request->getHeaderLine($headerName)); |
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} |
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} |
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ksort($headersToSign); |
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return $headersToSign; |
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} |
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} |
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