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60 lines
1.5 KiB
Diff
60 lines
1.5 KiB
Diff
From 1a5bbf0ee895bbd66fb3ce66be44b1074bb20324 Mon Sep 17 00:00:00 2001
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From: Tad <tad@spotco.us>
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Date: Wed, 28 Feb 2018 08:21:28 -0500
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Subject: [PATCH] Build time variable for AES-256 encryption
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Change-Id: I25eba5939c965323e4ffa6d95c6736b671c51e09
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---
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Android.mk | 4 ++++
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cryptfs.cpp | 9 ++++++++-
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2 files changed, 12 insertions(+), 1 deletion(-)
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diff --git a/Android.mk b/Android.mk
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index 14bf99a..0e9f3e1 100644
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--- a/Android.mk
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+++ b/Android.mk
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@@ -115,6 +115,10 @@ ifeq ($(TARGET_HW_DISK_ENCRYPTION),true)
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vold_cflags += -DCONFIG_HW_DISK_ENCRYPTION
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endif
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+ifeq ($(TARGET_WANTS_STRONG_ENCRYPTION),true)
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+LOCAL_CFLAGS += -DCONFIG_STRONG_ENCRYPTION
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+endif
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+
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ifneq ($(TARGET_EXFAT_DRIVER),)
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vold_cflags += -DCONFIG_EXFAT_DRIVER=\"$(TARGET_EXFAT_DRIVER)\"
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mini_src_files += fs/Exfat.cpp
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diff --git a/cryptfs.cpp b/cryptfs.cpp
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index f01929a..7fb3ffa 100644
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--- a/cryptfs.cpp
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+++ b/cryptfs.cpp
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@@ -75,9 +75,17 @@ extern "C" {
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#define DM_CRYPT_BUF_SIZE 4096
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+#ifdef CONFIG_STRONG_ENCRYPTION
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+#define HASH_COUNT 6000
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+#define KEY_LEN_BYTES 32
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+#define IV_LEN_BYTES 32
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+#define RSA_KEY_SIZE 4096
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+#else
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#define HASH_COUNT 2000
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#define KEY_LEN_BYTES 16
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#define IV_LEN_BYTES 16
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+#define RSA_KEY_SIZE 2048
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+#endif
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#define KEY_IN_FOOTER "footer"
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@@ -93,7 +101,6 @@ extern "C" {
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#define TABLE_LOAD_RETRIES 10
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-#define RSA_KEY_SIZE 2048
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#define RSA_KEY_SIZE_BYTES (RSA_KEY_SIZE / 8)
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#define RSA_EXPONENT 0x10001
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#define KEYMASTER_CRYPTFS_RATE_LIMIT 1 // Maximum one try per second
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--
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2.16.2
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