aboutsummaryrefslogtreecommitdiff
path: root/common/image-sig.c
blob: f3c209ae8b72a8564a4ca610af138689b712205e (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
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
// SPDX-License-Identifier: GPL-2.0+
/*
 * Copyright (c) 2013, Google Inc.
 */

#ifdef USE_HOSTCC
#include "mkimage.h"
#include <fdt_support.h>
#include <time.h>
#include <linux/libfdt.h>
#else
#include <common.h>
#include <log.h>
#include <malloc.h>
DECLARE_GLOBAL_DATA_PTR;
#endif /* !USE_HOSTCC*/
#include <image.h>
#include <u-boot/rsa.h>
#include <u-boot/rsa-checksum.h>

#define IMAGE_MAX_HASHED_NODES		100

struct checksum_algo checksum_algos[] = {
	{
		.name = "sha1",
		.checksum_len = SHA1_SUM_LEN,
		.der_len = SHA1_DER_LEN,
		.der_prefix = sha1_der_prefix,
#if IMAGE_ENABLE_SIGN
		.calculate_sign = EVP_sha1,
#endif
		.calculate = hash_calculate,
	},
	{
		.name = "sha256",
		.checksum_len = SHA256_SUM_LEN,
		.der_len = SHA256_DER_LEN,
		.der_prefix = sha256_der_prefix,
#if IMAGE_ENABLE_SIGN
		.calculate_sign = EVP_sha256,
#endif
		.calculate = hash_calculate,
	},
#ifdef CONFIG_SHA384
	{
		.name = "sha384",
		.checksum_len = SHA384_SUM_LEN,
		.der_len = SHA384_DER_LEN,
		.der_prefix = sha384_der_prefix,
#if IMAGE_ENABLE_SIGN
		.calculate_sign = EVP_sha384,
#endif
		.calculate = hash_calculate,
	},
#endif
#ifdef CONFIG_SHA512
	{
		.name = "sha512",
		.checksum_len = SHA512_SUM_LEN,
		.der_len = SHA512_DER_LEN,
		.der_prefix = sha512_der_prefix,
#if IMAGE_ENABLE_SIGN
		.calculate_sign = EVP_sha512,
#endif
		.calculate = hash_calculate,
	},
#endif

};

struct crypto_algo crypto_algos[] = {
	{
		.name = "rsa2048",
		.key_len = RSA2048_BYTES,
		.sign = rsa_sign,
		.add_verify_data = rsa_add_verify_data,
		.verify = rsa_verify,
	},
	{
		.name = "rsa4096",
		.key_len = RSA4096_BYTES,
		.sign = rsa_sign,
		.add_verify_data = rsa_add_verify_data,
		.verify = rsa_verify,
	}

};

struct padding_algo padding_algos[] = {
	{
		.name = "pkcs-1.5",
		.verify = padding_pkcs_15_verify,
	},
#ifdef CONFIG_FIT_ENABLE_RSASSA_PSS_SUPPORT
	{
		.name = "pss",
		.verify = padding_pss_verify,
	}
#endif /* CONFIG_FIT_ENABLE_RSASSA_PSS_SUPPORT */
};

struct checksum_algo *image_get_checksum_algo(const char *full_name)
{
	int i;
	const char *name;

#if !defined(USE_HOSTCC) && defined(CONFIG_NEEDS_MANUAL_RELOC)
	static bool done;

	if (!done) {
		done = true;
		for (i = 0; i < ARRAY_SIZE(checksum_algos); i++) {
			checksum_algos[i].name += gd->reloc_off;
#if IMAGE_ENABLE_SIGN
			checksum_algos[i].calculate_sign += gd->reloc_off;
#endif
			checksum_algos[i].calculate += gd->reloc_off;
		}
	}
#endif

	for (i = 0; i < ARRAY_SIZE(checksum_algos); i++) {
		name = checksum_algos[i].name;
		/* Make sure names match and next char is a comma */
		if (!strncmp(name, full_name, strlen(name)) &&
		    full_name[strlen(name)] == ',')
			return &checksum_algos[i];
	}

	return NULL;
}

struct crypto_algo *image_get_crypto_algo(const char *full_name)
{
	int i;
	const char *name;

#if !defined(USE_HOSTCC) && defined(CONFIG_NEEDS_MANUAL_RELOC)
	static bool done;

	if (!done) {
		done = true;
		for (i = 0; i < ARRAY_SIZE(crypto_algos); i++) {
			crypto_algos[i].name += gd->reloc_off;
			crypto_algos[i].sign += gd->reloc_off;
			crypto_algos[i].add_verify_data += gd->reloc_off;
			crypto_algos[i].verify += gd->reloc_off;
		}
	}
#endif

	/* Move name to after the comma */
	name = strchr(full_name, ',');
	if (!name)
		return NULL;
	name += 1;

	for (i = 0; i < ARRAY_SIZE(crypto_algos); i++) {
		if (!strcmp(crypto_algos[i].name, name))
			return &crypto_algos[i];
	}

	return NULL;
}

struct padding_algo *image_get_padding_algo(const char *name)
{
	int i;

	if (!name)
		return NULL;

	for (i = 0; i < ARRAY_SIZE(padding_algos); i++) {
		if (!strcmp(padding_algos[i].name, name))
			return &padding_algos[i];
	}

	return NULL;
}