1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /* Signature verification
3 *
4 * Copyright (C) 2014 Red Hat, Inc. All Rights Reserved.
5 * Written by David Howells (dhowells@redhat.com)
6 */
7
8 #ifndef _LINUX_VERIFICATION_H
9 #define _LINUX_VERIFICATION_H
10
11 #include <linux/errno.h>
12 #include <linux/types.h>
13
14 /*
15 * Indicate that both builtin trusted keys and secondary trusted keys
16 * should be used.
17 */
18 #define VERIFY_USE_SECONDARY_KEYRING ((struct key *)1UL)
19 #define VERIFY_USE_PLATFORM_KEYRING ((struct key *)2UL)
20
21 static inline int system_keyring_id_check(u64 id)
22 {
23 if (id > (unsigned long)VERIFY_USE_PLATFORM_KEYRING)
24 return -EINVAL;
25
26 return 0;
27 }
28
29 /*
30 * The use to which an asymmetric key is being put.
31 */
32 enum key_being_used_for {
33 VERIFYING_MODULE_SIGNATURE,
34 VERIFYING_FIRMWARE_SIGNATURE,
35 VERIFYING_KEXEC_PE_SIGNATURE,
36 VERIFYING_KEY_SIGNATURE,
37 VERIFYING_KEY_SELF_SIGNATURE,
38 VERIFYING_UNSPECIFIED_SIGNATURE,
39 NR__KEY_BEING_USED_FOR
40 };
41 extern const char *const key_being_used_for[NR__KEY_BEING_USED_FOR];
42
43 #ifdef CONFIG_SYSTEM_DATA_VERIFICATION
44
45 struct key;
46 struct pkcs7_message;
47
48 extern int verify_pkcs7_signature(const void *data, size_t len,
49 const void *raw_pkcs7, size_t pkcs7_len,
50 struct key *trusted_keys,
51 enum key_being_used_for usage,
52 int (*view_content)(void *ctx,
53 const void *data, size_t len,
54 size_t asn1hdrlen),
55 void *ctx);
56 extern int verify_pkcs7_message_sig(const void *data, size_t len,
57 struct pkcs7_message *pkcs7,
58 struct key *trusted_keys,
59 enum key_being_used_for usage,
60 int (*view_content)(void *ctx,
61 const void *data,
62 size_t len,
63 size_t asn1hdrlen),
64 void *ctx);
65
66 #ifdef CONFIG_SIGNED_PE_FILE_VERIFICATION
67 extern int verify_pefile_signature(const void *pebuf, unsigned pelen,
68 struct key *trusted_keys,
69 enum key_being_used_for usage);
70 #endif
71
72 #endif /* CONFIG_SYSTEM_DATA_VERIFICATION */
73 #endif /* _LINUX_VERIFY_PEFILE_H */
74
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