Make PSSH parser more robust.
(This is a merge of http://go/wvgerrit/12700 from the Widevine CDM repository.) Adds unit tests which cover several cases, including five which are fixed in this patch: * Find a Widevine PSSH after a PSSH with non-zero flags. (We have no control over another provider's abuse of the flags field, so we should not give up if such a PSSH appears before ours.) * Find a Widevine PSSH after a v1 PSSH. (CENC now specifies a general v1 format. We don't have to support it directly in the CDM, but we do have to skip it gracefully.) * Find a Widevine PSSH after a non-PSSH box. (This would be unusual input, but we can easily recover from it.) * Parse a PSSH box with a size field of 0, which means "the rest of the buffer." (This would be unusual input, too, but is technically allowed for any MP4 box.) * Parse a v1 Widevine PSSH box, ignoring the new fields we don't need. Bug: 19288007 Change-Id: I355df9e34ba4d53cc02e8501de965a0d193ee554
This commit is contained in:
John "Juce" Bruce
165
libwvdrmengine/cdm/core/test/initialization_data_unittest.cpp
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165
libwvdrmengine/cdm/core/test/initialization_data_unittest.cpp
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// Copyright 2015 Google Inc. All Rights Reserved.
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#include "gmock/gmock.h"
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#include "gtest/gtest.h"
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#include "initialization_data.h"
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#include "string_conversions.h"
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#include "wv_cdm_constants.h"
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// References:
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// [1] http://dashif.org/identifiers/content-protection/
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// [2] http://www.w3.org/TR/encrypted-media/cenc-format.html#common-system
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namespace {
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const std::string kWidevinePssh = wvcdm::a2bs_hex(
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// Widevine PSSH box
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"00000042" // atom size
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"70737368" // atom type="pssh"
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"00000000" // v0, flags=0
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"edef8ba979d64acea3c827dcd51d21ed" // system id (Widevine)
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"00000022" // data size
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// data:
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"08011a0d7769646576696e655f74657374220f73747265616d696e675f636c697031");
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const std::string kWidevinePsshFirst = wvcdm::a2bs_hex(
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// first PSSH box, Widevine
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"00000042" // atom size
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"70737368" // atom type "pssh"
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"00000000" // v0, flags=0
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"edef8ba979d64acea3c827dcd51d21ed" // system id (Widevine)
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"00000022" // data size
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// data:
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"08011a0d7769646576696e655f74657374220f73747265616d696e675f636c697031"
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// second PSSH box, Playready [1]
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"00000028" // atom size
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"70737368" // atom type "pssh"
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"00000000" // v0, flags=0
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"9a04f07998404286ab92e65be0885f95" // system id (PlayReady)
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"00000008" // data size
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// arbitrary data:
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"0102030405060708");
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const std::string kWidevinePsshAfterV0Pssh = wvcdm::a2bs_hex(
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// first PSSH box, Playready [1]
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"00000028" // atom size
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"70737368" // atom type "pssh"
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"00000000" // v0, flags=0
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"9a04f07998404286ab92e65be0885f95" // system id (PlayReady)
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"00000008" // data size
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// arbitrary data:
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"0102030405060708"
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// second PSSH box, Widevine
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"00000042" // atom size
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"70737368" // atom type "pssh"
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"00000000" // v0, flags=0
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"edef8ba979d64acea3c827dcd51d21ed" // system id (Widevine)
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"00000022" // data size
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// data:
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"08011a0d7769646576696e655f74657374220f73747265616d696e675f636c697031");
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const std::string kWidevinePsshAfterNonZeroFlags = wvcdm::a2bs_hex(
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// first PSSH box, Playready [1]
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"00000028" // atom size
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"70737368" // atom type "pssh"
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"00abcdef" // v0, flags=abcdef
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"9a04f07998404286ab92e65be0885f95" // system id (PlayReady)
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"00000008" // data size
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// arbitrary data:
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"0102030405060708"
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// second PSSH box, Widevine
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"00000042" // atom size
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"70737368" // atom type "pssh"
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"00000000" // v0, flags=0
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"edef8ba979d64acea3c827dcd51d21ed" // system id (Widevine)
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"00000022" // data size
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// data:
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"08011a0d7769646576696e655f74657374220f73747265616d696e675f636c697031");
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const std::string kWidevinePsshAfterV1Pssh = wvcdm::a2bs_hex(
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// first PSSH box, generic CENC [2]
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"00000044" // atom size
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"70737368" // atom type "pssh"
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"01000000" // v1, flags=0
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"1077efecc0b24d02ace33c1e52e2fb4b" // system id (generic CENC)
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"00000002" // key ID count
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"30313233343536373839303132333435" // key ID="0123456789012345"
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"38393031323334354142434445464748" // key ID="ABCDEFGHIJKLMNOP"
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"00000000" // data size=0
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// second PSSH box, Widevine
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"00000042" // atom size
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"70737368" // atom type "pssh"
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"00000000" // v0, flags=0
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"edef8ba979d64acea3c827dcd51d21ed" // system id (Widevine)
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"00000022" // data size
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// data:
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"08011a0d7769646576696e655f74657374220f73747265616d696e675f636c697031");
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const std::string kWidevineV1Pssh = wvcdm::a2bs_hex(
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// Widevine PSSH box, v1 format
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"00000044" // atom size
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"70737368" // atom type "pssh"
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"01000000" // v1, flags=0
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"edef8ba979d64acea3c827dcd51d21ed" // system id (Widevine)
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"00000002" // key ID count
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"30313233343536373839303132333435" // key ID="0123456789012345"
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"38393031323334354142434445464748" // key ID="ABCDEFGHIJKLMNOP"
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"00000022" // data size
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// data:
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"08011a0d7769646576696e655f74657374220f73747265616d696e675f636c697031");
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const std::string kOtherBoxFirst = wvcdm::a2bs_hex(
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// first box, not a PSSH box
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"00000018" // atom size
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"77686174" // atom type "what"
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"deadbeefdeadbeefdeadbeefdeadbeef" // garbage box data
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// second box, a Widevine PSSH box
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"00000042" // atom size
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"70737368" // atom type "pssh"
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"00000000" // v0, flags=0
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"edef8ba979d64acea3c827dcd51d21ed" // system id (Widevine)
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"00000022" // data size
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// data:
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"08011a0d7769646576696e655f74657374220f73747265616d696e675f636c697031");
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const std::string kZeroSizedPsshBox = wvcdm::a2bs_hex(
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// Widevine PSSH box
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"00000000" // atom size (whole buffer)
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"70737368" // atom type="pssh"
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"00000000" // v0, flags=0
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"edef8ba979d64acea3c827dcd51d21ed" // system id (Widevine)
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"00000022" // data size
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// data:
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"08011a0d7769646576696e655f74657374220f73747265616d696e675f636c697031");
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class InitializationDataTest
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: public ::testing::TestWithParam<std::string> {};
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} // namespace
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namespace wvcdm {
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TEST_P(InitializationDataTest, Parse) {
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InitializationData init_data(ISO_BMFF_VIDEO_MIME_TYPE, GetParam());
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EXPECT_FALSE(init_data.IsEmpty());
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}
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INSTANTIATE_TEST_CASE_P(
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ParsePssh, InitializationDataTest,
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::testing::Values(
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kWidevinePssh,
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kWidevinePsshFirst,
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kWidevinePsshAfterV0Pssh,
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kWidevinePsshAfterNonZeroFlags,
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kWidevinePsshAfterV1Pssh,
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kWidevineV1Pssh,
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kOtherBoxFirst,
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kZeroSizedPsshBox
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));
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} // namespace wvcdm
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