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1 | /** @file\r |
2 | Header for the RDRAND APIs used by RNG DXE driver.\r | |
3 | \r | |
4 | Support API definitions for RDRAND instruction access, which will leverage\r | |
5 | Intel Secure Key technology to provide high-quality random numbers for use\r | |
6 | in applications, or entropy for seeding other random number generators.\r | |
7 | Refer to http://software.intel.com/en-us/articles/intel-digital-random-number\r | |
8 | -generator-drng-software-implementation-guide/ for more information about Intel\r | |
9 | Secure Key technology.\r | |
10 | \r | |
11 | Copyright (c) 2013, Intel Corporation. All rights reserved.<BR>\r | |
3b60842c | 12 | (C) Copyright 2015 Hewlett Packard Enterprise Development LP<BR>\r |
3aa8dc6c LQ |
13 | This program and the accompanying materials\r |
14 | are licensed and made available under the terms and conditions of the BSD License\r | |
15 | which accompanies this distribution. The full text of the license may be found at\r | |
16 | http://opensource.org/licenses/bsd-license.php\r | |
17 | \r | |
18 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
19 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
20 | \r | |
21 | **/\r | |
22 | \r | |
23 | #ifndef __RD_RAND_H__\r | |
24 | #define __RD_RAND_H__\r | |
25 | \r | |
26 | #include <Library/BaseLib.h>\r | |
27 | #include <Library/BaseMemoryLib.h>\r | |
28 | #include <Library/UefiBootServicesTableLib.h>\r | |
29 | #include <Library/TimerLib.h>\r | |
30 | #include <Protocol/Rng.h>\r | |
31 | \r | |
3aa8dc6c LQ |
32 | /**\r |
33 | Calls RDRAND to fill a buffer of arbitrary size with random bytes.\r | |
34 | \r | |
35 | @param[in] Length Size of the buffer, in bytes, to fill with.\r | |
36 | @param[out] RandBuffer Pointer to the buffer to store the random result.\r | |
37 | \r | |
38 | @retval EFI_SUCCESS Random bytes generation succeeded.\r | |
39 | @retval EFI_NOT_READY Failed to request random bytes.\r | |
40 | \r | |
41 | **/\r | |
42 | EFI_STATUS\r | |
43 | EFIAPI\r | |
44 | RdRandGetBytes (\r | |
45 | IN UINTN Length,\r | |
46 | OUT UINT8 *RandBuffer\r | |
47 | );\r | |
48 | \r | |
49 | /**\r | |
50 | Generate high-quality entropy source through RDRAND.\r | |
51 | \r | |
52 | @param[in] Length Size of the buffer, in bytes, to fill with.\r | |
53 | @param[out] Entropy Pointer to the buffer to store the entropy data.\r | |
54 | \r | |
55 | @retval EFI_SUCCESS Entropy generation succeeded.\r | |
56 | @retval EFI_NOT_READY Failed to request random data.\r | |
57 | \r | |
58 | **/\r | |
59 | EFI_STATUS\r | |
60 | EFIAPI\r | |
61 | RdRandGenerateEntropy (\r | |
62 | IN UINTN Length,\r | |
63 | OUT UINT8 *Entropy\r | |
64 | );\r | |
65 | \r | |
3b60842c | 66 | #endif // __RD_RAND_H__\r |