X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;f=src%2FUtil%2FHTTPSignature.php;h=225a2bcf20f16081b97d7f7f392311aeb75ebad9;hb=44b2b97e80624aca5768511def80a95f0e6e0381;hp=9f732acb6e1725aa9bbe5fb3be3ca510b677ea74;hpb=8b7cb5d9efeab580c2592e0fbe301f7142b73a3d;p=friendica.git

diff --git a/src/Util/HTTPSignature.php b/src/Util/HTTPSignature.php
index 9f732acb6e..225a2bcf20 100644
--- a/src/Util/HTTPSignature.php
+++ b/src/Util/HTTPSignature.php
@@ -485,6 +485,31 @@ class HTTPSignature
 		return $curlResult;
 	}
 
+	/**
+	 * Fetch the apcontact entry of the keyId in the given header
+	 *
+	 * @param array $http_headers
+	 *
+	 * @return array APContact entry
+	 */
+	public static function getKeyIdContact(array $http_headers): array
+	{
+		if (empty($http_headers['HTTP_SIGNATURE'])) {
+			Logger::debug('No HTTP_SIGNATURE header', ['header' => $http_headers]);
+			return [];
+		}
+
+		$sig_block = self::parseSigHeader($http_headers['HTTP_SIGNATURE']);
+
+		if (empty($sig_block['keyId'])) {
+			Logger::debug('No keyId', ['sig_block' => $sig_block]);
+			return [];
+		}
+
+		$url = (strpos($sig_block['keyId'], '#') ? substr($sig_block['keyId'], 0, strpos($sig_block['keyId'], '#')) : $sig_block['keyId']);
+		return APContact::getByURL($url);
+	}
+
 	/**
 	 * Gets a signer from a given HTTP request
 	 *
@@ -508,7 +533,7 @@ class HTTPSignature
 				return false;
 			}
 
-			$actor = JsonLD::fetchElement($object, 'actor', 'id');
+			$actor = JsonLD::fetchElement($object, 'actor', 'id') ?? '';
 		} else {
 			$actor = '';
 		}