Add RSASSA-PSS encryption OID to AlgorithmIdentifier

The Object Identifier (OID) for the RSASSA-PSS encryption algorithm has been added to the AlgorithmIdentifier class. Adjustments have also been made to handle this additional case in OneAsymmetricKey. This enhances support for encryption variety and expands compatibility.

src/CryptoTypes/AlgorithmIdentifier/AlgorithmIdentifier.php

@@ -29,6 +29,8 @@ abstract class AlgorithmIdentifier implements AlgorithmIdentifierType
 
     final public const OID_SHA1_WITH_RSA_ENCRYPTION = '1.2.840.113549.1.1.5';
 
+    final public const OID_RSASSA_PSS_ENCRYPTION = '1.2.840.113549.1.1.10';
+
     final public const OID_SHA256_WITH_RSA_ENCRYPTION = '1.2.840.113549.1.1.11';
 
     final public const OID_SHA384_WITH_RSA_ENCRYPTION = '1.2.840.113549.1.1.12';

src/CryptoTypes/Asymmetric/OneAsymmetricKey.php

@@ -181,8 +181,9 @@ public function privateKey(): PrivateKey
     {
         $algo = $this->algorithmIdentifier();
         switch ($algo->oid()) {
-            // RSA
+            // RSA (including RSASSA-PSS)
             case AlgorithmIdentifier::OID_RSA_ENCRYPTION:
+            case AlgorithmIdentifier::OID_RSASSA_PSS_ENCRYPTION:
                 return RSAPrivateKey::fromDER($this->privateKeyData);
                 // elliptic curve
             case AlgorithmIdentifier::OID_EC_PUBLIC_KEY:
@@ -225,8 +226,9 @@ public function privateKey(): PrivateKey
                 return X448PrivateKey::fromOctetString(OctetString::fromDER($this->privateKeyData), $pubkey)
                     ->withVersion($this->version)
                     ->withAttributes($this->attributes);
+            default:
+                throw new RuntimeException('Private key ' . $algo->name() . ' not supported.');
         }
-        throw new RuntimeException('Private key ' . $algo->name() . ' not supported.');
     }
 
     /**