fix: gracefully parse non-standard trusted certificates

Signed-off-by: Richard Steinmetz <richard@steinmetz.cloud>

lib/private/Security/Certificate.php

@@ -41,6 +41,16 @@ public function __construct(string $data, string $name) {
 		}
 
 		$info = openssl_x509_parse($data);
+		if (!is_array($info)) {
+			// There is a non-standardized certificate format only used by OpenSSL. Replace all
+			// separators and try again.
+			$data = str_replace(
+				['-----BEGIN TRUSTED CERTIFICATE-----', '-----END TRUSTED CERTIFICATE-----'],
+				['-----BEGIN CERTIFICATE-----', '-----END CERTIFICATE-----'],
+				$data,
+			);
+			$info = openssl_x509_parse($data);
+		}
 		if (!is_array($info)) {
 			throw new \Exception('Certificate could not get parsed.');
 		}

tests/data/certificates/openSslTrustedCertificate.crt

@@ -0,0 +1,25 @@
+-----BEGIN TRUSTED CERTIFICATE-----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+-----END TRUSTED CERTIFICATE-----

tests/lib/Security/CertificateTest.php

@@ -40,7 +40,12 @@ public function testBogusData(): void {
 		$certificate->getIssueDate();
 	}
 
-
+	public function testOpenSslTrustedCertificateFormat(): void {
+		// Should not throw an exception
+		$trustedCertificate = file_get_contents(__DIR__ . '/../../data/certificates/openSslTrustedCertificate.crt');
+		$this->expiredCertificate = new Certificate($trustedCertificate, 'TrustedCertificate');
+	}
+
 	public function testCertificateStartingWithFileReference(): void {
 		$this->expectException(\Exception::class);
 		$this->expectExceptionMessage('Certificate could not get parsed.');