DivestOS/Patches/LineageOS-14.1/android_system_vold/0001-AES256.patch

From af22f14223092a5403bc33608260f355b57284f3 Mon Sep 17 00:00:00 2001
From: Tad <tad@spotco.us>
Date: Mon, 1 Jan 2018 09:50:29 -0500
Subject: [PATCH] Build time variable for AES-256 encryption

Change-Id: Id08b5a18c5b4d4ec1f3f67a8e5eab93f5b967060
---
 cryptfs.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/cryptfs.c b/cryptfs.c
index b25510f..86ffac3 100644
--- a/cryptfs.c
+++ b/cryptfs.c
@@ -76,9 +76,17 @@
 
 #define DM_CRYPT_BUF_SIZE 4096
 
+#ifdef CONFIG_STRONG_ENCRYPTION
+#define HASH_COUNT 6000
+#define KEY_LEN_BYTES 32
+#define IV_LEN_BYTES 32
+#define RSA_KEY_SIZE 4096
+#else
 #define HASH_COUNT 2000
 #define KEY_LEN_BYTES 16
 #define IV_LEN_BYTES 16
+#define RSA_KEY_SIZE 2048
+#endif
 
 #define KEY_IN_FOOTER  "footer"
 
@@ -94,13 +102,12 @@
 
 #define TABLE_LOAD_RETRIES 10
 
-#define RSA_KEY_SIZE 2048
 #define RSA_KEY_SIZE_BYTES (RSA_KEY_SIZE / 8)
 #define RSA_EXPONENT 0x10001
 #define KEYMASTER_CRYPTFS_RATE_LIMIT 1  // Maximum one try per second
 
 #define RETRY_MOUNT_ATTEMPTS 20
-#define RETRY_MOUNT_DELAY_SECONDS 1
+#define RETRY_MOUNT_DELAY_SECONDS 3
 
 char *me = "cryptfs";
 
-- 
2.15.1