From adf9fc4639592d6ee30d662058ae34b94e4d127b Mon Sep 17 00:00:00 2001
From: Paul Schaub <vanitasvitae@fsfe.org>
Date: Mon, 14 Jul 2025 21:33:51 +0200
Subject: [PATCH] Fix IndexOutOfBounds, but keep decryption with only SK
 working

---
 .../decryption_verification/OpenPgpMessageInputStream.kt   | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/pgpainless-core/src/main/kotlin/org/pgpainless/decryption_verification/OpenPgpMessageInputStream.kt b/pgpainless-core/src/main/kotlin/org/pgpainless/decryption_verification/OpenPgpMessageInputStream.kt
index 5524dcae..9112273e 100644
--- a/pgpainless-core/src/main/kotlin/org/pgpainless/decryption_verification/OpenPgpMessageInputStream.kt
+++ b/pgpainless-core/src/main/kotlin/org/pgpainless/decryption_verification/OpenPgpMessageInputStream.kt
@@ -347,12 +347,7 @@ class OpenPgpMessageInputStream(
             "Symmetrically Encrypted Data Packet at depth ${layerMetadata.depth} encountered.")
         syntaxVerifier.next(InputSymbol.ENCRYPTED_DATA)
         val encDataList = packetInputStream!!.readEncryptedDataList()
-        if (encDataList.isEmpty) {
-            LOGGER.debug(
-                "Missing encrypted session key packet.")
-            return false
-        }
-        if (!encDataList.isIntegrityProtected && !encDataList.get(0).isAEAD) {
+        if (!encDataList.isIntegrityProtected && !encDataList.isEmpty && !encDataList.get(0).isAEAD) {
             LOGGER.warn("Symmetrically Encrypted Data Packet is not integrity-protected.")
             if (!options.isIgnoreMDCErrors()) {
                 throw MessageNotIntegrityProtectedException()