This vold command returns 0 if the given password matches the password
used to decrypt the device on boot. It returns 1 if they don't match,
and it returns -1 on an internal error, and -2 if the device is not encrypted.
Also check the uid of the sender of the command and only allow the root and
system users to issue cryptfs commands.
Change-Id: I5e5ae3b72a2d7814ae68c2d49aa9deb90fb1dac5
If a raw block is specified for key storage, do not try to force the size
of the file to 16 Kbytes when writing the keys, and do not complain if
the size is not 16 Kbytes when reading the keys. Only do them if the
keyfile is a regular file.
Change-Id: I4de1cb7c3614479d93289d4f2767ca6ce1bbbc73
Add the force_and_revert option to the unmount command which will force
the unmount, and revert a crypto mapping. This is used during factory
reset so that when the internal sdcard volume is formatted, it formats
the raw device, not the encrypted mapping.
Change-Id: I36b6ff9bb54863b121de635472a303bf4a2334a9
Mounting was already not allowed, but also unshare before starting
encryption, and don't allow sharing or formatting to be initiated
during encrytion.
Change-Id: Ida188d81f025739ba4dd90492b3e66088735991e
Forgot to include the size of the userdata partition when computing
the total size of vold managed volumes to encrypt.
Change-Id: I237548439d4380b4225ffbc603fa972c3b1c5bae
Add support for keeping the keys in a separate file on another partition,
for devices with no space reserved for a footer after the userdata filesystem.
Add support for encrypting the volumes managed by vold, if they meet certain
criteria, namely being marked as nonremovable and encryptable in vold.fstab.
A bit of trickiness is required to keep vold happy.
Change-Id: Idf0611f74b56c1026c45742ca82e0c26e58828fe
Fix for bug 3415286. Trigger an action in init.rc to load the persistent
properties after /data has been decrypted and mounted.
Change-Id: I5fe3b481bcc6963113e830728c204b22ffc3b722
The new android_reboot() function is a nicer way to reboot.
It can optionally sync(2) and remount as read-only writable
filesystems. This fixes bug 3350709.
Change-Id: I4618bd5e8cccdce08494a7ca3f40ef72b2875e68
Need to detect if the encryption process didn't finish successfully, and if
so, provide a way for the UI to detect that and give the user an option to
wipe the system clean. Otherwise, the user is stuck in a reboot loop, and
they will need to do magic button presses to enter recovery and wipe the
device to get out of it.
Change-Id: I58253e1e523ee42bdd1a59aa7d8a9d20071bd18b
Bug 3384231 is punted to MR1, but the code to set the flag is already
in the tree, so this CL does 3 things:
1. Comments out the lines that set the flag
2. Removes the change to the checkpw that was added in the last change.
3. Implements a new command to check the flag (which no one is calling
yet and the flag won't be set anyhow).
When MR1 comes, it will be a simple matter to enable the flag setting
code and start testing it.
The fear is a false positive detection of incomplete encryption could
cause people to be prompted to wipe their data when MR1 comes out and
the flag is checked. Not setting this for first release, and testing
this more before MR1, will give us confidence that the code will not
detect false positives of encryption failure.
Change-Id: I6dfba11646e291fe5867e8375b71a53c815f3968
For the case there encryption failes to complete because of a kernel
crash or the user power cycling the device, define a flag in the
crypto footer that says encryption is in progress. Set it when starting
the actual encryption, and clear it when it successfully completes.
When the user is asked for the disk password, if the flag is set,
return a special error to the caller so the UI can know to tell the
user there is no valid data on the disk, and present a button to
wipe and reset the device.
Change-Id: I3723ec77f33437d94b3ac9ad5db0a5c950d11648
The Progress bar UI grabs a full wakelock when encrypting, but we've seen
a case where it looks like the progress bar UI crashes, and the wakelock is
lost, and then all hell breaks loose. The enablecrypto command has a lot of
work to do, and it will take some time, so it should grab a wakelock to
ensure it can finish without being interrupted and put to sleep.
It grabs a partial wake lock, as it doesn't need the screen to be on to do
its work. If the UI wants to keep it on, it should also grab a full wakelock,
which it does. If the UI crashes, the screen may turn off, but the encryption
will keep going, and vold will reboot the device when it's done.
Change-Id: I51d3a72b8c77383044a3facb1604c1ee510733ae
If the already existing filesystem encompasses the entire /data partition
and does not leave the last 16 Kbytes for the crypto footer, refuse to
do encrypt in place and return an error. This is only an issue for folks
with early development systems trying to encrypt an old /data. This should
not be seen in released devices.
Also, if there is an error, try to report back to the UI what the error was
so it can deal with it.
Change-Id: If66781a4fe03034c96c3dd12075240deb8663db0
The master key is now stored unhashed in memory. This
is needed because certain operation like remote reseting
of passwords the old password is not avaliable.
The changepw interface has been changed to only take
the new password as the only argument. When this is
called we reencrypt the master key with the new password
and old salt.
Bug: 3382129
Change-Id: I9a596b89013194605d6d7790067691aa0dc75e72
In order to prevent rainbow table attacks on decrypting the master key,
create a 16 byte "salt" by reading /dev/urandom. This is done right after
reading urandom to get the master key for the filesystem. The salt is
stored 32 bytes after the end of the key (a padding added to help prevent
accidental overwriting of the salt) and the salt is fixed at 16 bytes long.
This change will make existing encrypted filesystems unusable.
Change-Id: I420549d064c61d38aea78eef4d86c88acb265ca3
Maintain and query some internal state to know if it's OK to run
the various cryptfs commands. Do not allow enablecrypto to run if
the device is already encrypted. Do no allow restart to run if
we have already run it before or if the password has not been
validated. Do not allow checkpw to run if not encrypted, or it
has already validated the password.
This is an extra layer of safety on top of the checks up in the
UI code agains possible DoS attacks on the device.
Change-Id: I9afc8d42773020e82a512e6b637feede101d1362
Also, change the value that triggers the progress bar framework from
"startup" to "0" in the property vold.encrypt_progress.
Change-Id: I3890e66a95283ce2ceeca82f516859b083919b9e
Update the enable inplace API to allow the UI to show a progress bar.
Add new command changepw (whichis currently not working)
Internal restructuring of code to support these two features.
Some minor cleanup of the code as well.
Change-Id: I11461fc9ce66965bea6cd0b6bb2ff48bcf607b97
In order to make the animations and the UI look right, we need to change
the cryptfs checkpw command to return a status if the password was
correct or not, and not have it automatically restart if it's correct.
There is a new command restart that will restart the framework with the
encrypted filesystem.
Change-Id: Ia8ae00d7ed8667699aa58d05ad8ba953cca9316e
Now that the framework shuts down quickly, remove the 30
second sleep when enabling crypto. Also, stop spewing
the secret master key to the disk in the system log!
Change-Id: Icb3f9456ababe3dff8de52cbbae92da0e9e5dd2f
There are still a few hacks and performance issues related
to shutting down the framework in this code, but it is
functional and tested. Without the UI changes, it requires
cryptic adb shell commands to enable, which I shall not
utter here.
Change-Id: I0b8f90afd707e17fbdb0373d156236946633cf8b
