From 51a0e82eb29a6dfc79f93479883383fbdbf8bcc2 Mon Sep 17 00:00:00 2001
From: Dees_Troy <dees_troy@teamw.in>
Date: Wed, 5 Sep 2012 15:24:24 -0400
Subject: TWRP-ify AOSP code

Pull in most TWRP sources
Stub out partition management code
Make it compile -- probably will not boot
Kind of a mess but have to start somewhere
---
 crypto/jb/cryptfs.h | 89 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 89 insertions(+)
 create mode 100644 crypto/jb/cryptfs.h

(limited to 'crypto/jb/cryptfs.h')

diff --git a/crypto/jb/cryptfs.h b/crypto/jb/cryptfs.h
new file mode 100644
index 000000000..1c1bc1aea
--- /dev/null
+++ b/crypto/jb/cryptfs.h
@@ -0,0 +1,89 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/* This structure starts 16,384 bytes before the end of a hardware
+ * partition that is encrypted.
+ * Immediately following this structure is the encrypted key.
+ * The keysize field tells how long the key is, in bytes.
+ * Then there is 32 bytes of padding,
+ * Finally there is the salt used with the user password.
+ * The salt is fixed at 16 bytes long.
+ * Obviously, the filesystem does not include the last 16 kbytes
+ * of the partition.
+ */
+
+#define CRYPT_FOOTER_OFFSET 0x4000
+
+#define MAX_CRYPTO_TYPE_NAME_LEN 64
+
+#define SALT_LEN 16
+#define KEY_TO_SALT_PADDING 32
+
+/* definitions of flags in the structure below */
+#define CRYPT_MNT_KEY_UNENCRYPTED 0x1 /* The key for the partition is not encrypted. */
+#define CRYPT_ENCRYPTION_IN_PROGRESS 0x2 /* Set when starting encryption,
+                                          * clear when done before rebooting */
+
+#define CRYPT_MNT_MAGIC 0xD0B5B1C4
+
+#define __le32 unsigned int
+#define __le16 unsigned short int 
+
+struct crypt_mnt_ftr {
+  __le32 magic;		/* See above */
+  __le16 major_version;
+  __le16 minor_version;
+  __le32 ftr_size; 	/* in bytes, not including key following */
+  __le32 flags;		/* See above */
+  __le32 keysize;	/* in bytes */
+  __le32 spare1;	/* ignored */
+  __le64 fs_size;	/* Size of the encrypted fs, in 512 byte sectors */
+  __le32 failed_decrypt_count; /* count of # of failed attempts to decrypt and
+				  mount, set to 0 on successful mount */
+  unsigned char crypto_type_name[MAX_CRYPTO_TYPE_NAME_LEN]; /* The type of encryption
+							       needed to decrypt this
+							       partition, null terminated */
+};
+
+struct volume_info {
+   unsigned int size;
+   unsigned int flags;
+   struct crypt_mnt_ftr crypt_ftr;
+   char mnt_point[256];
+   char blk_dev[256];
+   char crypto_blkdev[256];
+   char label[256];
+};
+#define VOL_NONREMOVABLE 0x1
+#define VOL_ENCRYPTABLE  0x2
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+  int cryptfs_crypto_complete(void);
+  int cryptfs_check_passwd(char *pw);
+  int cryptfs_verify_passwd(char *newpw);
+  int cryptfs_restart(void);
+  int cryptfs_enable(char *flag, char *passwd);
+  int cryptfs_changepw(char *newpw);
+  int cryptfs_setup_volume(const char *label, int major, int minor,
+                           char *crypto_dev_path, unsigned int max_pathlen,
+                           int *new_major, int *new_minor);
+  int cryptfs_revert_volume(const char *label);
+#ifdef __cplusplus
+}
+#endif
+
-- 
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