From 4eca40d7d8ff6968ed68a24686093cfb6f5f6373 Mon Sep 17 00:00:00 2001
From: Ethan Yonker <dees_troy@teamw.in>
Date: Tue, 11 Nov 2014 14:52:28 -0600
Subject: Add lollipop decrypt support

Kang in cryptfs.c and cryptfs.h from vold.
Use TW_INCLUDE_L_CRYPTO := true to enable.
Ramdisk must contain the normal fstab file in the root in the
usual format of:
fstab.{ro.hardware}
For examble for Nexus 5:
fstab.hammerhead
Or on many Qualcomm devices:
fstab.qcom

Tested against Android 5.0 lollipop on Nexus 7 2012 grouper. Not
sure if or how this will work when we are dealing with a device
with a hardware keystore. Long term we need to add a GUI element
to allow entering a pattern. For now you can decrypt a pattern
unlock by converting the dots to numbers in the following format:
123
456
789

So an upper-case L would translate to 14789 as a password entered
on the keyboard.

Change-Id: I02c29e1f1c2eb29bf002c9fe0fc118357300b5b3
---
 crypto/lollipop/Android.mk | 52 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 52 insertions(+)
 create mode 100644 crypto/lollipop/Android.mk

(limited to 'crypto/lollipop/Android.mk')

diff --git a/crypto/lollipop/Android.mk b/crypto/lollipop/Android.mk
new file mode 100644
index 000000000..cce070b56
--- /dev/null
+++ b/crypto/lollipop/Android.mk
@@ -0,0 +1,52 @@
+LOCAL_PATH := $(call my-dir)
+ifeq ($(TW_INCLUDE_L_CRYPTO), true)
+include $(CLEAR_VARS)
+
+common_c_includes := \
+	system/extras/ext4_utils \
+	system/extras/f2fs_utils \
+	external/openssl/include \
+	external/stlport/stlport \
+	bionic \
+	external/scrypt/lib/crypto \
+	frameworks/native/include \
+	system/security/keystore \
+	hardware/libhardware/include/hardware \
+	system/security/softkeymaster/include/keymaster
+
+common_shared_libraries := \
+	libsysutils \
+	libstlport \
+	libbinder \
+	libcutils \
+	liblog \
+	libdiskconfig \
+	libhardware_legacy \
+	liblogwrap \
+	libext4_utils \
+	libf2fs_sparseblock \
+	libcrypto \
+	libselinux \
+	libutils \
+	libhardware \
+	libsoftkeymaster
+
+LOCAL_MODULE := libcryptfslollipop
+LOCAL_MODULE_TAGS := eng optional
+LOCAL_CFLAGS :=
+LOCAL_SRC_FILES = cryptfs.c
+#LOCAL_C_INCLUDES += \
+#    system/extras/ext4_utils \
+#    external/openssl/include \
+#    system/extras/f2fs_utils \
+#    external/scrypt/lib/crypto \
+#    system/security/keystore \
+#    hardware/libhardware/include/hardware \
+#	system/security/softkeymaster/include/keymaster
+#LOCAL_SHARED_LIBRARIES += libc liblog libcutils libcrypto libext4_utils
+LOCAL_SHARED_LIBRARIES := $(common_shared_libraries)
+LOCAL_C_INCLUDES := external/openssl/include $(common_c_includes)
+LOCAL_STATIC_LIBRARIES += libfs_mgr libscrypt_static liblogwrap libmincrypttwrp
+
+include $(BUILD_SHARED_LIBRARY)
+endif
-- 
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