| 3ad9072a5d6f6bda32123b367545649364e3c11d |
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05-Oct-2011 |
Ken Sumrall <ksumrall@android.com> |
Add the new verifypw command to vold/cryptfs
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
/system/vold/cryptfs.h
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| 0b8b59719357fb80c330442787f7d5b1e332263b |
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01-Sep-2011 |
Ken Sumrall <ksumrall@android.com> |
Add the ability to revert a crypto mapping when unmounting a volume
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
/system/vold/cryptfs.h
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| 29d8da8cefa99e436c13295d4c9bad060ca18a6d |
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19-May-2011 |
Ken Sumrall <ksumrall@android.com> |
vold: allow to store key in a file on another partition
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
/system/vold/cryptfs.h
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| 7f7dbaa2784c10fd2989fb303e5edfb8136d53dc |
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02-Feb-2011 |
Ken Sumrall <ksumrall@android.com> |
Improve detection of incomplete encryption
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
/system/vold/cryptfs.h
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| d33d417e3a057fffad22c23f5f002177531db2a5 |
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01-Feb-2011 |
Ken Sumrall <ksumrall@android.com> |
Detect when encryption failed to complete
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
/system/vold/cryptfs.h
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| 70a4b3fd7a84a84bbe6e9d6d4ca3ee2098259fd9 |
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28-Jan-2011 |
Jason parks <jparks@google.com> |
Change cryptfs changepw to only require a new password.
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
/system/vold/cryptfs.h
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| e87440703663f5ee326326f6438f3b00ea315623 |
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19-Jan-2011 |
Ken Sumrall <ksumrall@android.com> |
Create and use a salt when calling pbkdf2 to encrypt/decrypt the master key.
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
/system/vold/cryptfs.h
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| 8ddbe40a8a8708dac7c472fa8c098c8f7b24534c |
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18-Jan-2011 |
Ken Sumrall <ksumrall@android.com> |
Updates to cryptfs framework.
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
/system/vold/cryptfs.h
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| 6864b7ec94a57b73c300457955d86dc604aeddf5 |
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15-Jan-2011 |
Ken Sumrall <ksumrall@android.com> |
Change the cryptfs command to separate out checking the password and restarting
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
/system/vold/cryptfs.h
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| 8f869aa1bc685b505c58e97b4e11a9c7491a16f9 |
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03-Dec-2010 |
Ken Sumrall <ksumrall@android.com> |
Support for encrypting /data on Stingray.
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
/system/vold/cryptfs.h
|