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Refactor OEMCrypto_SetDecryptHash

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The current implementation of OEMCrypto_SetDecryptHash gives developers
flexibility to use different types of hashes. However, all the
implementations we have seen thus far use crc32. Because of this, crc32
should be sufficient and we can refactor OEMCrypto_SetDecryptHash to
only use the crc32 hash.

Bug: 287706586
Change-Id: I4aaa253b2656dfd9c984f77dfb08fe160b23b47c
This commit is contained in:
Vicky Min
2023-08-01 17:29:41 +00:00
committed by Robert Shih
parent c26d6d3c97
commit 18369730b9
8 changed files with 51 additions and 43 deletions
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13
libwvdrmengine/oemcrypto/include/level3.h
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@@ -72,7 +72,7 @@ namespace wvoec3 {
#define Level3_SetSandbox _lcc84
#define Level3_ResourceRatingTier _lcc85
#define Level3_SupportsDecryptHash _lcc86
#define Level3_SetDecryptHash _lcc88
#define Level3_SetDecryptHash_V18 _lcc88
#define Level3_GetHashErrorCode _lcc89
#define Level3_RefreshKeys _lcc91
#define Level3_LoadEntitledContentKeys_V16 _lcc92
@@ -120,6 +120,7 @@ namespace wvoec3 {
#define Level3_GetSignatureHashAlgorithm _lcc139
#define Level3_EnterTestMode _lcc140
#define Level3_GetDeviceSignedCsrPayload _lcc141
#define Level3_SetDecryptHash _lcc143
#else
#define Level3_Initialize _oecc01
#define Level3_Terminate _oecc02
@@ -173,7 +174,7 @@ namespace wvoec3 {
#define Level3_SetSandbox _oecc84
#define Level3_ResourceRatingTier _oecc85
#define Level3_SupportsDecryptHash _oecc86
#define Level3_SetDecryptHash _oecc88
#define Level3_SetDecryptHash_V18 _oecc88
#define Level3_GetHashErrorCode _oecc89
#define Level3_RefreshKeys _oecc91
#define Level3_LoadEntitledContentKeys_V16 _oecc92
@@ -221,6 +222,7 @@ namespace wvoec3 {
#define Level3_GetSignatureHashAlgorithm _oecc139
#define Level3_EnterTestMode _oecc140
#define Level3_GetDeviceSignedCsrPayload _oecc141
#define Level3_SetDecryptHash _oecc143
#endif
#define Level3_GetInitializationState _oecl3o01
@@ -373,8 +375,11 @@ uint32_t Level3_ResourceRatingTier();
uint32_t Level3_SupportsDecryptHash();
OEMCryptoResult Level3_SetDecryptHash(OEMCrypto_SESSION session,
uint32_t frame_number,
const uint8_t* hash, size_t hash_length);
uint32_t frame_number, uint32_t crc32);
OEMCryptoResult Level3_SetDecryptHash_V18(OEMCrypto_SESSION session,
uint32_t frame_number,
const uint8_t* hash,
size_t hash_length);
OEMCryptoResult Level3_GetHashErrorCode(OEMCrypto_SESSION session,
uint32_t* failed_frame_number);
OEMCryptoResult Level3_BuildInformation(char* buffer, size_t* buffer_length);