blob: 760d234d36243b35cd3f3dfd86f82961c66b561e (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
|
/* Copyright (c) 2014 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*
* Misc functions which need access to vb2_context but are not public APIs
*/
#include "2sysincludes.h"
#include "2api.h"
#include "2common.h"
#include "2misc.h"
#include "2nvstorage.h"
#include "2secdata.h"
#include "2sha.h"
#include "2rsa.h"
int vb2_init_context(struct vb2_context *ctx)
{
struct vb2_shared_data *sd = vb2_get_sd(ctx);
/* Don't do anything if the context has already been initialized */
if (ctx->workbuf_used)
return VB2_SUCCESS;
/*
* Workbuf had better be big enough for our shared data struct and
* aligned. Not much we can do if it isn't; we'll die before we can
* store a recovery reason.
*/
if (ctx->workbuf_size < sizeof(*sd))
return VB2_ERROR_WORKBUF_TOO_SMALL;
if (!vb_aligned(ctx->workbuf, sizeof(uint32_t)))
return VB2_ERROR_BUFFER_UNALIGNED;
/* Initialize the shared data at the start of the work buffer */
memset(sd, 0, sizeof(*sd));
ctx->workbuf_used = sizeof(*sd);
return VB2_SUCCESS;
}
|
