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64 lines
1.5 KiB
Diff
64 lines
1.5 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Tad <tad@spotco.us>
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Date: Wed, 3 Jan 2018 11:55:06 -0500
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Subject: [PATCH] Build time variable for AES-256 encryption
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Change-Id: Ib2d53a1d22e935ef0fa5f0f91e3bf5308d9c6459
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---
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Android.mk | 4 ++++
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cryptfs.c | 11 +++++++++--
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2 files changed, 13 insertions(+), 2 deletions(-)
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diff --git a/Android.mk b/Android.mk
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index e645574..7112dce 100644
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--- a/Android.mk
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+++ b/Android.mk
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@@ -115,6 +115,10 @@ LOCAL_C_INCLUDES += $(TARGET_CRYPTFS_HW_PATH)
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LOCAL_CFLAGS += -DCONFIG_HW_DISK_ENCRYPTION
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endif
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+ifeq ($(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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include $(BUILD_STATIC_LIBRARY)
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include $(CLEAR_VARS)
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diff --git a/cryptfs.c b/cryptfs.c
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index 0ae9d9f..6141624 100644
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--- a/cryptfs.c
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+++ b/cryptfs.c
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@@ -76,9 +76,17 @@
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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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@@ -94,13 +102,12 @@
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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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#define RETRY_MOUNT_ATTEMPTS 20
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-#define RETRY_MOUNT_DELAY_SECONDS 1
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+#define RETRY_MOUNT_DELAY_SECONDS 3
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char *me = "cryptfs";
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