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android/libwvdrmengine
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John W. Bruce 82951b01ef Treat the (0,0) Pattern as 'cbcs' 
(This is a merge of http://go/wvgerrit/94928.)

In OEMCrypto v16, we dropped support for 'cens' and 'cbc1'. However, we
did not redefine the pattern (0,0) to be a valid pattern for 'cbcs', even
though it was no longer being used to signal 'cbc1'. Instead, we made
the CDM reject CTR with a pattern ('cens') and CBC with a (0,0) pattern
('cbc1') to mirror the behavior of OEMCrypto v16.

However, some apps have been using 'cbc1' mode to decrypt audio in
'cbcs' content. This is normally not possible but is possible for a
subset of content. Furthermore, it is easy to do by accident because of
the way most packagers package 'cbcs' audio and the special significance
Widevine has historically given the (0,0) pattern.

This patch updates the CDM to not reject CBC with a (0,0) pattern but
instead treat it as 'cbcs' content. To decrypt it correctly, the pattern
is treated specially inside the CDM core and converted to the
recommended equivalent pattern — (10,0) — before passing the content to
OEMCrypto.

For more specifics, please see the design doc: http://go/vclfg

Bug: 150219982
Test: ExoPlayer Demo App 'cbcs' Content
Test: GTS 'cbcs' Content
Change-Id: I334ff15db5f7b7d62040a036ba6d17515c3caee4
2020-03-04 12:11:29 -08:00
..
cdm
Treat the (0,0) Pattern as 'cbcs'
2020-03-04 12:11:29 -08:00
docs
Update Pi document
2020-02-05 17:02:56 -08:00
include
Combined Decrypt Calls
2020-02-19 11:44:35 -08:00
include_hidl
Combined Decrypt Calls
2020-02-19 11:44:35 -08:00
level3
OEMCrypto v16.1
2020-02-03 14:45:32 -08:00
mediacrypto
Treat the (0,0) Pattern as 'cbcs'
2020-03-04 12:11:29 -08:00
mediadrm
Adding app package name to license request.
2020-02-20 13:23:16 -08:00
oem_certificate_generator
Support both PEM format and DER format intermediate certs
2019-01-28 09:38:53 -08:00
oemcrypto
Combined Decrypt Calls
2020-02-19 11:44:35 -08:00
src
wv hidl: upgrade Drm/Crypto factories to v1.3
2019-12-16 01:19:49 -08:00
src_hidl
wv hidl: upgrade Drm/Crypto factories to v1.3
2019-12-16 01:19:49 -08:00
test
Link with actual headers instead of symlinks
2020-01-07 15:26:14 -08:00
tools/metrics_dump
OEMCrypto v16.1
2020-02-03 14:45:32 -08:00
vts/vendor_module
Link dynamic libcrypto.so to resolve FIPS cert breakage.
2019-09-16 14:38:00 -07:00
Android.mk
OEMCrypto v16.2
2020-02-04 20:33:16 -08:00
build_and_run_all_unit_tests.sh
Search for test executables in odk_test
2020-02-26 13:51:14 -08:00
common_widevine_service.mk
wv hidl: upgrade Drm/Crypto factories to v1.3
2019-12-16 01:19:49 -08:00
diff_changes.sh
Add script to diff test results between changes
2019-03-22 10:17:43 -07:00
manifest_android.hardware.drm@1.2-service.widevine.xml
Add Widevine L3 drm service to cuttlefish
2019-10-23 17:00:33 -07:00
manifest_android.hardware.drm@1.3-service.widevine.xml
wv hidl: upgrade Drm/Crypto factories to v1.3
2019-12-16 01:19:49 -08:00
move_widevine_data.sh
Change move_widevine_data.sh to move L3 files
2019-05-16 20:25:54 +00:00
README
Add README for Android
2018-11-22 00:33:30 +00:00
run_all_unit_tests.sh
Use staging provisioning server
2020-02-18 14:26:29 -08:00
run_gts_and_cts_tests.sh
Add a script to run the GTS and CTS media tests
2019-02-08 10:19:51 -08:00
TEST_MAPPING
Add CTS/GTS tests for TH presumbit.
2019-10-02 17:38:05 -07:00

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           |
+------------------------------+------------------------------+