From f6806d05da0bbac22a3c72f73580b73620c5a6d3 Mon Sep 17 00:00:00 2001
From: Paul Schaub <vanitasvitae@fsfe.org>
Date: Tue, 3 Jun 2025 11:49:59 +0200
Subject: [PATCH] EncryptionMechanismNegotiator: Allow producing AEADED/OED
 packets

---
 .../negotiation/EncryptionMechanismNegotiator.kt         | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/pgpainless-core/src/main/kotlin/org/pgpainless/algorithm/negotiation/EncryptionMechanismNegotiator.kt b/pgpainless-core/src/main/kotlin/org/pgpainless/algorithm/negotiation/EncryptionMechanismNegotiator.kt
index c8476910..238e3212 100644
--- a/pgpainless-core/src/main/kotlin/org/pgpainless/algorithm/negotiation/EncryptionMechanismNegotiator.kt
+++ b/pgpainless-core/src/main/kotlin/org/pgpainless/algorithm/negotiation/EncryptionMechanismNegotiator.kt
@@ -67,6 +67,15 @@ fun interface EncryptionMechanismNegotiator {
                         return MessageEncryptionMechanism.aead(
                             bestSupportedMode.ciphermode.algorithmId,
                             bestSupportedMode.aeadAlgorithm.algorithmId)
+                    } else if (features.all { it.contains(Feature.LIBREPGP_OCB_ENCRYPTED_DATA) }) {
+                        return MessageEncryptionMechanism.librePgp(
+                            symmetricKeyAlgorithmNegotiator
+                                .negotiate(
+                                    policy.messageEncryptionAlgorithmPolicy
+                                        .symmetricAlgorithmPolicy,
+                                    null,
+                                    symmetricAlgorithmPreferences)
+                                .algorithmId)
                     }
                     // If all support SEIPD1, negotiate SEIPD1 using symmetricKeyAlgorithmNegotiator
                     else if (features.all { it.contains(Feature.MODIFICATION_DETECTION) }) {