96431e9c2d
Merge from Widevine repo of http://go/wvgerrit/77609 For v15.2 we require that nonces not collide across sessions and there are restrictions placed on the mac key's IV in LoadKeys. Test: ran unit tests on reference code Bug: 131325434 Bug: 131326334 Change-Id: I1bb01c30d8c15d66d762c28b57d7700c44daa835
43 lines
1002 B
C++
43 lines
1002 B
C++
// Copyright 2018 Google LLC. All Rights Reserved. This file and proprietary
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// source code may only be used and distributed under the Widevine Master
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// License Agreement.
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//
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// Reference implementation of OEMCrypto APIs
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//
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#ifndef REF_OEMCRYPTO_NONCE_TABLE_H_
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#define REF_OEMCRYPTO_NONCE_TABLE_H_
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#include <stdint.h>
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namespace wvoec_ref {
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class NonceTable {
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public:
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static const int kTableSize = 4;
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NonceTable() {
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for (int i = 0; i < kTableSize; ++i) {
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state_[i] = kNTStateInvalid;
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}
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}
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~NonceTable() {}
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void AddNonce(uint32_t nonce);
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bool CheckNonce(uint32_t nonce);
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// Verify that the nonce is not the same as any in this table.
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bool NonceCollision(uint32_t nonce) const;
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void Flush();
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private:
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enum NonceTableState {
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kNTStateInvalid,
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kNTStateValid,
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kNTStateFlushPending
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};
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NonceTableState state_[kTableSize];
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uint32_t age_[kTableSize];
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uint32_t nonces_[kTableSize];
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};
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} // namespace wvoec_ref
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#endif // REF_OEMCRYPTO_NONCE_TABLE_H_
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