Add UEFI RNG Protocol support. The driver will leverage Intel Secure Key technology to produce the Random Number Generator protocol, which is used to provide high-quality random numbers for use in applications, or entropy for seeding other random number generators. Refer to http://software.intel.com/en-us/articles/intel-digital-random-number-generator-drng-software-implementation-guide/ for more information about Intel Secure Key technology.

Signed-off-by: Long, Qin <qin.long@intel.com>
Reviewed-by: Fu, Siyuan <siyuan.fu@intel.com>
Reviewed-by: Rosenbaum, Lee G <lee.g.rosenbaum@intel.com>


git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@14858 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Long, Qin
2013-11-19 01:49:49 +00:00
committed by sfu5
parent 419db80bef
commit 3aa8dc6cd3
17 changed files with 2247 additions and 0 deletions

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/** @file
RDRAND Support Routines.
Copyright (c) 2013, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#include "RdRand.h"
/**
Calls RDRAND to request a word-length random number.
@param[out] Rand Buffer pointer to store the random number.
@param[in] NeedRetry Determine whether or not to loop retry.
@retval EFI_SUCCESS Random word generation succeeded.
@retval EFI_NOT_READY Failed to request random word.
**/
EFI_STATUS
EFIAPI
RdRandWord (
OUT UINTN *Rand,
IN BOOLEAN NeedRetry
)
{
return RdRand64 (Rand, NeedRetry);
}
/**
Calls RDRAND to request multiple word-length random numbers.
@param[in] Length Size of the buffer, in words, to fill with.
@param[out] RandBuffer Pointer to the buffer to store the random result.
@retval EFI_SUCCESS Random words generation succeeded.
@retval EFI_NOT_READY Failed to request random words.
**/
EFI_STATUS
EFIAPI
RdRandGetWords (
IN UINTN Length,
OUT UINTN *RandBuffer
)
{
EFI_STATUS Status;
UINT32 Index;
for (Index = 0; Index < Length; Index++) {
//
// Obtain one word-length (64-bit) Random Number with possible retry-loop.
//
Status = RdRand64 (RandBuffer, TRUE);
if (EFI_ERROR (Status)) {
return Status;
}
RandBuffer++;
}
return EFI_SUCCESS;
}