From 01454570a703d697437fcac49357592a35b8f2ee Mon Sep 17 00:00:00 2001
From: Jonas Jenwald <jonas.jenwald@gmail.com>
Date: Thu, 16 Jul 2026 15:31:36 +0200
Subject: [PATCH] Reduce duplication in
 `CipherTransformFactory.prototype.createCipherTransform`

After PR 21485 the `AES256Cipher` case is effectively duplicated, and while it's not a lot of code it's easy enough to avoid that.
---
 src/core/crypto.js | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/src/core/crypto.js b/src/core/crypto.js
index 744254e29..24e201d88 100644
--- a/src/core/crypto.js
+++ b/src/core/crypto.js
@@ -1280,7 +1280,7 @@ class CipherTransformFactory {
             PasswordResponses.NEED_PASSWORD
           );
         }
-        if (this.algorithm === 5) {
+        if (this.algorithm === 5 || cfm.name === "AESV3") {
           // V=5 always uses 256-bit AES with the file encryption key, even
           // when a producer wrongly sets the crypt filter's CFM to AESV2
           // (bug 2046659).
@@ -1308,9 +1308,6 @@ class CipherTransformFactory {
             )
           );
         }
-        if (cfm.name === "AESV3") {
-          return AES256Cipher.bind(null, this.encryptionKey);
-        }
         throw new FormatError("Unknown crypto method");
       };