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
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
|
/* Copyright (c) 2013 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.
*
* High-level firmware API for loading and verifying rewritable firmware.
* (Firmware portion)
*/
#include "sysincludes.h"
#include "bmpblk_header.h"
#include "region.h"
#include "gbb_header.h"
#include "load_kernel_fw.h"
#include "utility.h"
#include "vboot_api.h"
#include "vboot_struct.h"
static VbError_t VbRegionReadGbb(VbCommonParams *cparams, uint32_t offset,
uint32_t size, void *buf)
{
return VbRegionReadData(cparams, VB_REGION_GBB, offset, size, buf);
}
VbError_t VbGbbReadBmpHeader(VbCommonParams *cparams, BmpBlockHeader *hdr_ret)
{
BmpBlockHeader *hdr;
VbError_t ret;
if (!cparams)
return VBERROR_INVALID_GBB;
if (!cparams->bmp) {
GoogleBinaryBlockHeader *gbb = cparams->gbb;
if (0 == gbb->bmpfv_size)
return VBERROR_INVALID_GBB;
hdr = VbExMalloc(sizeof(*hdr));
ret = VbRegionReadGbb(cparams, gbb->bmpfv_offset,
sizeof(BmpBlockHeader), hdr);
if (ret) {
VbExFree(hdr);
return ret;
}
/* Sanity-check the bitmap block header */
if ((0 != Memcmp(hdr->signature, BMPBLOCK_SIGNATURE,
BMPBLOCK_SIGNATURE_SIZE)) ||
(hdr->major_version > BMPBLOCK_MAJOR_VERSION) ||
((hdr->major_version == BMPBLOCK_MAJOR_VERSION) &&
(hdr->minor_version > BMPBLOCK_MINOR_VERSION))) {
VBDEBUG(("VbDisplayScreenFromGBB(): "
"invalid/too new bitmap header\n"));
VbExFree(hdr);
return VBERROR_INVALID_BMPFV;
}
cparams->bmp = hdr;
}
*hdr_ret = *cparams->bmp;
return VBERROR_SUCCESS;
}
VbError_t VbRegionReadHWID(VbCommonParams *cparams, char *hwid,
uint32_t max_size)
{
GoogleBinaryBlockHeader *gbb;
VbError_t ret;
if (!max_size)
return VBERROR_INVALID_PARAMETER;
*hwid = '\0';
StrnAppend(hwid, "{INVALID}", max_size);
if (!cparams)
return VBERROR_INVALID_GBB;
gbb = cparams->gbb;
if (0 == gbb->hwid_size) {
VBDEBUG(("VbHWID(): invalid hwid size\n"));
return VBERROR_SUCCESS; /* oddly enough! */
}
if (gbb->hwid_size > max_size) {
VBDEBUG(("VbDisplayDebugInfo(): invalid hwid offset/size\n"));
return VBERROR_INVALID_PARAMETER;
}
ret = VbRegionReadGbb(cparams, gbb->hwid_offset, gbb->hwid_size, hwid);
if (ret)
return ret;
return VBERROR_SUCCESS;
}
VbError_t VbGbbReadImage(VbCommonParams *cparams,
uint32_t localization, uint32_t screen_index,
uint32_t image_num, ScreenLayout *layout,
ImageInfo *image_info, char **image_datap,
uint32_t *image_data_sizep)
{
uint32_t layout_offset, image_offset, data_offset, data_size;
GoogleBinaryBlockHeader *gbb;
BmpBlockHeader hdr;
void *data = NULL;
VbError_t ret;
if (!cparams)
return VBERROR_INVALID_GBB;
ret = VbGbbReadBmpHeader(cparams, &hdr);
if (ret)
return ret;
gbb = cparams->gbb;
layout_offset = gbb->bmpfv_offset + sizeof(BmpBlockHeader) +
localization * hdr.number_of_screenlayouts *
sizeof(ScreenLayout) +
screen_index * sizeof(ScreenLayout);
ret = VbRegionReadGbb(cparams, layout_offset, sizeof(*layout), layout);
if (ret)
return ret;
if (!layout->images[image_num].image_info_offset)
return VBERROR_NO_IMAGE_PRESENT;
image_offset = gbb->bmpfv_offset +
layout->images[image_num].image_info_offset;
ret = VbRegionReadGbb(cparams, image_offset, sizeof(*image_info),
image_info);
if (ret)
return ret;
data_offset = image_offset + sizeof(*image_info);
data_size = image_info->compressed_size;
if (data_size) {
void *orig_data;
data = VbExMalloc(image_info->compressed_size);
ret = VbRegionReadGbb(cparams, data_offset,
image_info->compressed_size, data);
if (ret) {
VbExFree(data);
return ret;
}
if (image_info->compression != COMPRESS_NONE) {
uint32_t inoutsize = image_info->original_size;
orig_data = VbExMalloc(image_info->original_size);
ret = VbExDecompress(data,
image_info->compressed_size,
image_info->compression,
orig_data, &inoutsize);
data_size = inoutsize;
VbExFree(data);
data = orig_data;
if (ret) {
VbExFree(data);
return ret;
}
}
}
*image_datap = data;
*image_data_sizep = data_size;
return VBERROR_SUCCESS;
}
#define OUTBUF_LEN 128
void VbRegionCheckVersion(VbCommonParams *cparams)
{
GoogleBinaryBlockHeader *gbb;
if (!cparams)
return;
gbb = cparams->gbb;
/*
* If GBB flags is nonzero, complain because that's something that the
* factory MUST fix before shipping. We only have to do this here,
* because it's obvious that something is wrong if we're not displaying
* screens from the GBB.
*/
if (gbb->major_version == GBB_MAJOR_VER && gbb->minor_version >= 1 &&
(gbb->flags != 0)) {
uint32_t used = 0;
char outbuf[OUTBUF_LEN];
*outbuf = '\0';
used += StrnAppend(outbuf + used, "gbb.flags is nonzero: 0x",
OUTBUF_LEN - used);
used += Uint64ToString(outbuf + used, OUTBUF_LEN - used,
gbb->flags, 16, 8);
used += StrnAppend(outbuf + used, "\n", OUTBUF_LEN - used);
(void)VbExDisplayDebugInfo(outbuf);
}
}
|
