From 551334a447ae99cfbc4ada2cbf87aee00099b01d Mon Sep 17 00:00:00 2001
From: Pol Henarejos <pol.henarejos@cttc.es>
Date: Thu, 22 Jan 2026 12:14:12 +0100
Subject: [PATCH] Clear dek on error.

Signed-off-by: Pol Henarejos <pol.henarejos@cttc.es>
---
 src/openpgp/openpgp.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/src/openpgp/openpgp.c b/src/openpgp/openpgp.c
index e4bc2f9..2e1c876 100644
--- a/src/openpgp/openpgp.c
+++ b/src/openpgp/openpgp.c
@@ -219,6 +219,10 @@ void scan_files_openpgp() {
     low_flash_available();
 }
 
+void release_dek() {
+    memset(dek, 0, sizeof(dek));
+}
+
 extern bool has_pwpiv;
 extern uint8_t session_pwpiv[32];
 int load_dek() {
@@ -245,6 +249,7 @@ int load_dek() {
         r = aes_decrypt_cfb_256(session_pwpiv, dek, dek + IV_SIZE, 32);
     }
     if (r != 0) {
+        release_dek();
         return PICOKEY_EXEC_ERROR;
     }
     if (otp_key_1) {
@@ -255,10 +260,6 @@ int load_dek() {
     return PICOKEY_OK;
 }
 
-void release_dek() {
-    memset(dek, 0, sizeof(dek));
-}
-
 int dek_encrypt(uint8_t *data, size_t len) {
     int r;
     if ((r = load_dek()) != PICOKEY_OK) {