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
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
|
/* Copyright (c) 2015 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.
*
* Create a BDB
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "bdb.h"
#include "host.h"
/* Parameters for creating a BDB hash entry */
struct create_hash {
/* File containing data */
const char *filename;
/* Type of data; enum bdb_data_type */
uint8_t type;
/* Address in RAM to load data. -1 means use default. */
uint64_t load_address;
/* Partition number containing data, or -1 to use the same partition as
* the BDB. */
uint8_t partition;
/*
* Offset of data from start of partition.
*
* TODO: if -1, append after BDB. But need to know how big the BDB
* is, and need to round up offset to 32-bit boundary.
*/
uint64_t offset;
};
/* Parameters for a key */
struct create_key {
/* Description */
const char *description;
/* Key version (not meaningful for BDB key) */
uint32_t key_version;
/* Public key filename (.keyb) */
const char *public_filename;
/* Private key filename (.pem) */
const char *private_filename;
};
struct create_params_2 {
/* Destination filename */
const char *filename;
/* Partition to contain the BDB */
uint8_t partition;
/* OEM area files. NULL means there is no data for that area. */
const char *oem_area_0_filename;
const char *oem_area_1_filename;
/* BDB key and subkey */
struct create_key bdbkey;
struct create_key subkey;
};
/*****************************************************************************/
/* FILL THIS IN WITH YOUR SOURCE DATA */
/*
* Creation parameters. Hash and num_hashes will be filled in automatically
* by create().
*/
struct bdb_create_params p = {
.bdb_load_address = 0x11223344,
.header_sig_description = "The header sig",
.data_sig_description = "The data sig",
.data_description = "Test BDB data",
.data_version = 3,
};
/* Additional parameters */
struct create_params_2 p2 = {
.filename = "build/bdb.bin",
.partition = 1,
.oem_area_0_filename = "testdata/oem0.bin",
.oem_area_1_filename = "testdata/oem1.bin",
.bdbkey = {
.description = "Test BDB key",
.key_version = 3,
.public_filename = "testkeys/bdbkey.keyb",
.private_filename = "testkeys/bdbkey.pem",
},
.subkey = {
.description = "Test Subkey",
.key_version = 4,
.public_filename = "testkeys/subkey.keyb",
.private_filename = "testkeys/subkey.pem",
},
};
/* List of hash entries, terminated by one with a NULL filename */
struct create_hash hash_entries[] = {
{
.filename = "testdata/sp-rw.bin",
.type = BDB_DATA_SP_RW,
.load_address = -1,
.partition = -1,
.offset = 0x10000,
},
{
.filename = "testdata/ap-rw.bin",
.type = BDB_DATA_AP_RW,
.load_address = 0x200000,
.partition = -1,
.offset = 0x28000,
},
{
.filename = NULL
},
};
/*****************************************************************************/
int create(void)
{
struct bdb_hash *hash;
struct bdb_header *h;
int i;
/* Count the number of hash entries */
for (p.num_hashes = 0; hash_entries[p.num_hashes].filename;
p.num_hashes++)
;
printf("Found %d hash entries\n", p.num_hashes);
/* Calculate hashes */
p.hash = hash = calloc(sizeof(struct bdb_hash), p.num_hashes);
for (i = 0; i < p.num_hashes; i++, hash++) {
const struct create_hash *he = hash_entries + i;
/* Read file and calculate size and hash */
uint8_t *buf = read_file(he->filename, &hash->size);
if (!buf)
return 1;
if (bdb_sha256(hash->digest, buf, hash->size)) {
fprintf(stderr, "Unable to calculate hash\n");
return 1;
}
free(buf);
hash->type = he->type;
hash->load_address = he->load_address;
hash->partition = he->partition == -1 ? p2.partition :
he->partition;
hash->offset = he->offset;
}
/* Read OEM data */
if (p2.oem_area_0_filename) {
p.oem_area_0 = read_file(p2.oem_area_0_filename,
&p.oem_area_0_size);
if (!p.oem_area_0)
return 1;
if (p.oem_area_0_size & 3) {
fprintf(stderr,
"OEM area 0 size isn't 32-bit aligned\n");
return 1;
}
}
if (p2.oem_area_1_filename) {
p.oem_area_1 = read_file(p2.oem_area_1_filename,
&p.oem_area_1_size);
if (!p.oem_area_1)
return 1;
if (p.oem_area_1_size & 3) {
fprintf(stderr,
"OEM area 1 size isn't 32-bit aligned\n");
return 1;
}
}
/* Load keys */
p.bdbkey = bdb_create_key(p2.bdbkey.public_filename,
p2.bdbkey.key_version,
p2.bdbkey.description);
p.subkey = bdb_create_key(p2.subkey.public_filename,
p2.subkey.key_version,
p2.subkey.description);
p.private_bdbkey = read_pem(p2.bdbkey.private_filename);
p.private_subkey = read_pem(p2.subkey.private_filename);
if (!p.bdbkey || !p.subkey || !p.private_bdbkey || !p.private_subkey) {
fprintf(stderr, "Unable to load keys\n");
return 1;
}
/* Create the BDB */
h = bdb_create(&p);
if (!h) {
fprintf(stderr, "Unable to create BDB\n");
return 1;
}
/* Write it */
if (write_file(p2.filename, h, h->bdb_size))
return 1;
/* Free keys and buffers */
free(p.bdbkey);
free(p.subkey);
RSA_free(p.private_bdbkey);
RSA_free(p.private_subkey);
free(h);
free(p.hash);
return 0;
}
/*****************************************************************************/
int main(void)
{
return create();
}
|
