random.c (818c7ce724770fbcdcd43725c81f2b3535f82b76) random.c (1786e83011644e18732ed006413339d5323766e9)
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (C) 2016 Linaro Ltd; <ard.biesheuvel@linaro.org>
4 */
5
6#include <linux/efi.h>
7#include <linux/log2.h>
8#include <asm/efi.h>
9
10#include "efistub.h"
11
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (C) 2016 Linaro Ltd; <ard.biesheuvel@linaro.org>
4 */
5
6#include <linux/efi.h>
7#include <linux/log2.h>
8#include <asm/efi.h>
9
10#include "efistub.h"
11
12typedef struct efi_rng_protocol efi_rng_protocol_t;
12typedef union efi_rng_protocol efi_rng_protocol_t;
13
14typedef struct {
15 u32 get_info;
16 u32 get_rng;
17} efi_rng_protocol_32_t;
18
19typedef struct {
20 u64 get_info;
21 u64 get_rng;
22} efi_rng_protocol_64_t;
23
13
14typedef struct {
15 u32 get_info;
16 u32 get_rng;
17} efi_rng_protocol_32_t;
18
19typedef struct {
20 u64 get_info;
21 u64 get_rng;
22} efi_rng_protocol_64_t;
23
24struct efi_rng_protocol {
25 efi_status_t (*get_info)(struct efi_rng_protocol *,
26 unsigned long *, efi_guid_t *);
27 efi_status_t (*get_rng)(struct efi_rng_protocol *,
28 efi_guid_t *, unsigned long, u8 *out);
24union efi_rng_protocol {
25 struct {
26 efi_status_t (*get_info)(efi_rng_protocol_t *,
27 unsigned long *, efi_guid_t *);
28 efi_status_t (*get_rng)(efi_rng_protocol_t *,
29 efi_guid_t *, unsigned long, u8 *out);
30 };
31 struct {
32 u32 get_info;
33 u32 get_rng;
34 } mixed_mode;
29};
30
31efi_status_t efi_get_random_bytes(efi_system_table_t *sys_table_arg,
32 unsigned long size, u8 *out)
33{
34 efi_guid_t rng_proto = EFI_RNG_PROTOCOL_GUID;
35 efi_status_t status;
35};
36
37efi_status_t efi_get_random_bytes(efi_system_table_t *sys_table_arg,
38 unsigned long size, u8 *out)
39{
40 efi_guid_t rng_proto = EFI_RNG_PROTOCOL_GUID;
41 efi_status_t status;
36 struct efi_rng_protocol *rng = NULL;
42 efi_rng_protocol_t *rng = NULL;
37
38 status = efi_call_early(locate_protocol, &rng_proto, NULL,
39 (void **)&rng);
40 if (status != EFI_SUCCESS)
41 return status;
42
43 return efi_call_proto(efi_rng_protocol, get_rng, rng, NULL, size, out);
44}

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157 return status;
158}
159
160efi_status_t efi_random_get_seed(efi_system_table_t *sys_table_arg)
161{
162 efi_guid_t rng_proto = EFI_RNG_PROTOCOL_GUID;
163 efi_guid_t rng_algo_raw = EFI_RNG_ALGORITHM_RAW;
164 efi_guid_t rng_table_guid = LINUX_EFI_RANDOM_SEED_TABLE_GUID;
43
44 status = efi_call_early(locate_protocol, &rng_proto, NULL,
45 (void **)&rng);
46 if (status != EFI_SUCCESS)
47 return status;
48
49 return efi_call_proto(efi_rng_protocol, get_rng, rng, NULL, size, out);
50}

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163 return status;
164}
165
166efi_status_t efi_random_get_seed(efi_system_table_t *sys_table_arg)
167{
168 efi_guid_t rng_proto = EFI_RNG_PROTOCOL_GUID;
169 efi_guid_t rng_algo_raw = EFI_RNG_ALGORITHM_RAW;
170 efi_guid_t rng_table_guid = LINUX_EFI_RANDOM_SEED_TABLE_GUID;
165 struct efi_rng_protocol *rng = NULL;
171 efi_rng_protocol_t *rng = NULL;
166 struct linux_efi_random_seed *seed = NULL;
167 efi_status_t status;
168
169 status = efi_call_early(locate_protocol, &rng_proto, NULL,
170 (void **)&rng);
171 if (status != EFI_SUCCESS)
172 return status;
173

--- 32 unchanged lines hidden --- 		172 struct linux_efi_random_seed *seed = NULL;
173 efi_status_t status;
174
175 status = efi_call_early(locate_protocol, &rng_proto, NULL,
176 (void **)&rng);
177 if (status != EFI_SUCCESS)
178 return status;
179

--- 32 unchanged lines hidden ---