Files
android/libwvdrmengine/cdm
Alex Dale 1069ae39cc Resize OEMCrypto buffer-based results on success.
[ Merge of http://go/wvgerrit/151191 ]

Within the CDM and OEMCrypto tests, there were a few OEMCrypto function
calls where the final size of the output buffers were not being
resized.  For several of these functions, an initial call is made with
zero-length output buffers, expecting OEMCrypto to return
ERROR_SHORT_BUFFER; followed by a call with buffers at least as large
as specified by OEMCrypto.  However, for some operations, OEMCrypto
makes an estimate on the final size on the first call, specifying the
exact size only after performing the operations.

This is the case for the wrapped key returned by
OEMCrypto_LoadProvisioning().  The provisioning response contains a
padded + encrypted DRM key.  OEMCrypto does not know the actual size
of the key until decrypted, and the actual DRM key might be smaller.

There was a OEMCrypto test for OEMCrypto_BuildInformation() which
was enforcing the wrong behaviour.  This has been updated.

Bug: 230661565
Test: oemcrypto_test
Change-Id: Iad297d56ffbb085894641fdf8698ce5fd18edbf2
2022-05-04 21:32:08 -07:00
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