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82 lines
1.9 KiB
C
82 lines
1.9 KiB
C
/** @file
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Copyright (C) 2020, vit9696. All rights reserved.
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All rights reserved.
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This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#ifndef OC_RNG_INTERNALS_H
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#define OC_RNG_INTERNALS_H
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#include <Library/OcCryptoLib.h>
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/**
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Performs delay on target platform to cause microoperating scheduling
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and introduce timing entropy.
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@param[in] Value Dummy value.
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@retval Dummy value.
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**/
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UINT64
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EFIAPI
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AsmAddRngJitter (
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IN UINT64 Value
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);
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//
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// Limited retry number when valid random data is returned.
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// Uses the recommended value defined in Section 7.3.17 of "Intel 64 and IA-32
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// Architectures Software Developer's Mannual".
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//
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#define RDRAND_RETRY_LIMIT 10
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//
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// Maximum amount of bytes emitted by PRNG before next reseed.
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//
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#define MAX_BYTES_TO_EMIT 1600000
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//
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// Maximum bytes in one buffer.
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//
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#define MAX_BYTES_IN_BUF (16*64)
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/**
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Random Number Generator context.
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**/
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typedef struct OC_RNG_CONTEXT_ {
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//
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// Hardware random number generator available.
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//
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BOOLEAN HardwareRngAvailable;
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//
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// Done initialising pseudo random number generator.
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//
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BOOLEAN PrngInitialised;
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//
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// Amount of bytes to emit before next reseed.
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//
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UINT32 BytesTillReseed;
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//
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// Amount of bytes in the current buffer.
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//
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UINT32 BytesInBuffer;
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//
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// Current CPRNG buffer.
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//
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UINT8 Buffer[MAX_BYTES_IN_BUF];
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//
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// ChaCha context.
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//
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CHACHA_CONTEXT ChaCha;
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} OC_RNG_CONTEXT;
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#endif // OC_RNG_INTERNALS_H
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