I've improved my last patch. Now it can work on versions 34 and 35. I
also fixed an issue that could prevent me from communicating with a
server that doesn't have this patch. But I'm not sure if it's gone. I
don't have any linux devices on which I can run nextcloud for
experiments. But in any case, it allows nextcloud to work with other
instances that have this patch. It's better than it being completely
inoperable
--- lib/public/Security/Signature/Enum/SignatureAlgorithm.php Thu Sep
24 16:42:24 2026
+++
/var/www/nextcloud/lib/public/Security/Signature/Enum/SignatureAlgorithm.php
Thu Oct 1 16:58:52 2026
@@ -22,4 +22,11 @@
case RSA_SHA256 = 'rsa-sha256';
/** @since 33.0.0 */
case RSA_SHA512 = 'rsa-sha512';
+
+ public function toInt(): int {
+ return match($this) {
+ self::RSA_SHA256 => OPENSSL_ALGO_SHA256,
+ self::RSA_SHA512 => OPENSSL_ALGO_SHA512,
+ };
+ }
}
--- a/lib/private/Security/Signature/Model/IncomingSignedRequest.php
Thu Sep 24 16:42:24 2026
+++ b/lib/private/Security/Signature/Model/IncomingSignedRequest.php
Thu Oct 1 17:06:08 2026
@@ -255,7 +255,7 @@
implode("\n", $this->getSignatureData()),
base64_decode($this->getSignature()),
$publicKey,
- $algorithm->value
+ $algorithm->toInt()
) !== 1) {
throw new InvalidSignatureException('signature
issue');
}
--- lib/private/Security/Signature/Model/OutgoingSignedRequest.php Thu
Sep 24 16:42:24 2026
+++
/var/www/nextcloud/lib/private/Security/Signature/Model/OutgoingSignedRequest.php
Thu Oct 1 17:01:17 2026
@@ -188,7 +188,7 @@
implode("\n", $this->getSignatureData()),
$signed,
$privateKey,
- $this->getAlgorithm()->value
+ $this->getAlgorithm()->toInt()
);
$this->setSignature(base64_encode($signed));
