Create a new boot/ directory
[platform/kernel/u-boot.git] / boot / image-sig.c
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * Copyright (c) 2013, Google Inc.
4  */
5
6 #include <common.h>
7 #include <log.h>
8 #include <malloc.h>
9 #include <asm/global_data.h>
10 DECLARE_GLOBAL_DATA_PTR;
11 #include <image.h>
12 #include <relocate.h>
13 #include <u-boot/ecdsa.h>
14 #include <u-boot/rsa.h>
15 #include <u-boot/hash-checksum.h>
16
17 #define IMAGE_MAX_HASHED_NODES          100
18
19 struct checksum_algo checksum_algos[] = {
20         {
21                 .name = "sha1",
22                 .checksum_len = SHA1_SUM_LEN,
23                 .der_len = SHA1_DER_LEN,
24                 .der_prefix = sha1_der_prefix,
25                 .calculate = hash_calculate,
26         },
27         {
28                 .name = "sha256",
29                 .checksum_len = SHA256_SUM_LEN,
30                 .der_len = SHA256_DER_LEN,
31                 .der_prefix = sha256_der_prefix,
32                 .calculate = hash_calculate,
33         },
34 #ifdef CONFIG_SHA384
35         {
36                 .name = "sha384",
37                 .checksum_len = SHA384_SUM_LEN,
38                 .der_len = SHA384_DER_LEN,
39                 .der_prefix = sha384_der_prefix,
40                 .calculate = hash_calculate,
41         },
42 #endif
43 #ifdef CONFIG_SHA512
44         {
45                 .name = "sha512",
46                 .checksum_len = SHA512_SUM_LEN,
47                 .der_len = SHA512_DER_LEN,
48                 .der_prefix = sha512_der_prefix,
49                 .calculate = hash_calculate,
50         },
51 #endif
52
53 };
54
55 struct checksum_algo *image_get_checksum_algo(const char *full_name)
56 {
57         int i;
58         const char *name;
59
60         if (IS_ENABLED(CONFIG_NEEDS_MANUAL_RELOC)) {
61                 static bool done;
62
63                 if (!done) {
64                         done = true;
65                         for (i = 0; i < ARRAY_SIZE(checksum_algos); i++) {
66                                 struct checksum_algo *algo = &checksum_algos[i];
67
68                                 MANUAL_RELOC(algo->name);
69                                 MANUAL_RELOC(algo->calculate);
70                         }
71                 }
72         }
73
74         for (i = 0; i < ARRAY_SIZE(checksum_algos); i++) {
75                 name = checksum_algos[i].name;
76                 /* Make sure names match and next char is a comma */
77                 if (!strncmp(name, full_name, strlen(name)) &&
78                     full_name[strlen(name)] == ',')
79                         return &checksum_algos[i];
80         }
81
82         return NULL;
83 }
84
85 struct crypto_algo *image_get_crypto_algo(const char *full_name)
86 {
87         struct crypto_algo *crypto, *end;
88         const char *name;
89
90         if (IS_ENABLED(CONFIG_NEEDS_MANUAL_RELOC)) {
91                 static bool done;
92
93                 if (!done) {
94                         done = true;
95                         crypto = ll_entry_start(struct crypto_algo, cryptos);
96                         end = ll_entry_end(struct crypto_algo, cryptos);
97                         for (; crypto < end; crypto++) {
98                                 MANUAL_RELOC(crypto->name);
99                                 MANUAL_RELOC(crypto->verify);
100                         }
101                 }
102         }
103
104         /* Move name to after the comma */
105         name = strchr(full_name, ',');
106         if (!name)
107                 return NULL;
108         name += 1;
109
110         crypto = ll_entry_start(struct crypto_algo, cryptos);
111         end = ll_entry_end(struct crypto_algo, cryptos);
112         for (; crypto < end; crypto++) {
113                 if (!strcmp(crypto->name, name))
114                         return crypto;
115         }
116
117         /* Not found */
118         return NULL;
119 }
120
121 struct padding_algo *image_get_padding_algo(const char *name)
122 {
123         struct padding_algo *padding, *end;
124
125         if (!name)
126                 return NULL;
127
128         padding = ll_entry_start(struct padding_algo, paddings);
129         end = ll_entry_end(struct padding_algo, paddings);
130         for (; padding < end; padding++) {
131                 if (!strcmp(padding->name, name))
132                         return padding;
133         }
134
135         return NULL;
136 }