tree 0687f84db12d5c0aa688d3682f48b227aa651803
parent 92a5dcfca463576b07c1927423aa2b869b59849c
author Ajay Panicker <apanicke@google.com> 1491947140 -0700
committer gitbuildkicker <android-build@google.com> 1492623911 -0700

Prevent OPP from opening files that aren't sent over Bluetooth

Before this patch an app could send an open intent to
BluetoothOppTransferService using a fake content provider to gain external
read and write access. We fix this by checking the Uri of the file before
opening it to see if it originated from the Bluetooth Share content provider.
We also stop graning write access to apps that we use to view the file.

Bug: 35385327
Test: PoC found in bug
Change-Id: Iad85490a0306b3e70767285393b204be22b11511
(cherry picked from commit f20350af42cd5cce1a762ef587ee50fef696f0f0)