android

Files

John W. Bruce ca00dc7ae4 Simplify How Request ID Indices are Generated

(This is a merge of http://go/wvgerrit/70667)

Request ID Index generation has historically worked by incrementing a
shared variable in one place and reading it in another place and
trusting the fact that CdmLicense calls these operations in a certain
order and only once per session to give each session a unique value.
This patch cleans this up a bit, having each session store the current
Request ID Index at the same time as it stores its Request ID Base. This
guarantees that each CryptoSession will receive a unique but stable
combination of Base and ID rather than relying on the calling pattern.

Since all this generation happens during the same function, the full
Request ID can be generated up-front and stored, making
GenerateRequestId() no longer necessary.

This patch also simplifies the threading story around this shared state
by using a std::atomic<uint64_t>. Bringing the code that interacts with
the shared state together into one place and replacing it with atomic
operations will simplify locking around this code when CryptoSession
locking is revamped in a future patch.

Bug: 70889998
Bug: 118584039
Test: CE CDM Unit Tests
Test: Android Unit Tests
Change-Id: I12d2f6501f872f1973e5a9af5125ca03f23e5a56

2019-01-23 09:52:46 -08:00

cdm

Simplify How Request ID Indices are Generated

2019-01-23 09:52:46 -08:00

docs

Update OEMCrypto documentation to 15.1

2019-01-07 09:53:07 -08:00

include

Add decrypt hash support

2019-01-07 10:14:25 -08:00

include_hidl

Add additional error conditions to MediaDrm

2019-01-10 15:17:48 -08:00

level3

Update property retrival method

2019-01-15 00:24:52 -08:00

mediacrypto

Fix IV handling for pattern encryption.

2019-01-16 16:34:52 -08:00

mediadrm

Update property retrival method

2019-01-15 00:24:52 -08:00

oem_certificate_generator

Deliver oem_certificate_generator

2017-05-05 00:12:26 +00:00

oemcrypto

Add some platform abstractions.

2019-01-16 11:06:55 -08:00

src

Update Copyright

2018-04-16 16:38:05 -07:00

src_hidl

Update property retrival method

2019-01-15 00:24:52 -08:00

test

Resolve Merge Disparity

2019-01-15 16:46:14 -08:00

vts/vendor_module

Update property retrival method

2019-01-15 00:24:52 -08:00

Android.mk

Add platform.cpp to Additional Build Files

2019-01-16 11:07:38 -08:00

build_and_run_all_unit_tests.sh

Add detail about L3 initialization

2018-12-14 11:32:19 -08:00

move_widevine_data.sh

Move persistent data to /data/vendor.

2018-01-15 13:50:06 -08:00

README

Add README for Android

2018-11-22 00:33:30 +00:00

run_all_unit_tests.sh

Add detail about L3 initialization

2018-12-14 11:32:19 -08:00

README

This is the source code for the Widevine Content Decryption Module (CDM) for the
Android OS.  It provides the libwvdrmengine plugin for DRM.

Partners who are integrating a device should be familiar with the documents in
the docs directory.

This source code is NOT open source, and is not part of AOSP.  However, it is
released to partners external to Google after official Android releases.  For
this reason, partners should look for bug fixes and software updates on the
widevine branches:

+------------------------------+------------------------------+
|Android Version               |Branch                        |
+------------------------------+------------------------------+
|Android L                     |lmp-mr1-widevine-release      |
+------------------------------+------------------------------+
|Android M MR1                 |mnc-mr1-widevine-release      |
+------------------------------+------------------------------+
|Android N MR2                 |nyc-mr2-widevine-release      |
+------------------------------+------------------------------+
|Android OC                    |oc-widevine-release           |
+------------------------------+------------------------------+
|Android OC MR1                |oc-mr1-widevine-release       |
+------------------------------+------------------------------+
|Android Pi                    |pi-widevine-release           |
+------------------------------+------------------------------+