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Clarify that FDPT hash covers the last sample

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Bug: 193266271
Change-Id: Ic769c05c6481d0d3f9eb08bce5fea2f39ac7ebe2
This commit is contained in:
Fred Gylys-Colwell
2023-11-21 20:19:24 -08:00
committed by Robert Shih
parent 1dc4377cde
commit adfaf69d1a
1 changed files with 6 additions and 0 deletions
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6
libwvdrmengine/oemcrypto/include/OEMCryptoCENC.h
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@@ -5307,6 +5307,12 @@ uint32_t OEMCrypto_SupportsDecryptHash(void);
* other error conditions, this returns OEMCrypto_ERROR_UNKNOWN_FAILURE. The
* length of the hash will be 4 bytes (32 bits) for the default CRC32 hash.
*
* Since version 16, the function OEMCrypto_DecryptCENC has allowed several
* samples to be decrypted in one function call using an array of
* samples. OEMCrypto may assume that the hash passed into this function is of
* the last sample in that array. In practice the test app only uses an array of
* length 1 for each call.
*
* This may be called before the first call to OEMCrypto_GetKeyHandle. In that
* case, this function cannot verify that the key control block allows hash
* verification. The function DecryptCENC should verify that the key control bit