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/types.h>
12 
13 /*
14  * Indicate that both builtin trusted keys and secondary trusted keys
15  * should be used.
16  */
17 #define VERIFY_USE_SECONDARY_KEYRING ((struct key *)1UL)
18 #define VERIFY_USE_PLATFORM_KEYRING  ((struct key *)2UL)
19 
20 /*
21  * The use to which an asymmetric key is being put.
22  */
23 enum key_being_used_for {
24 	VERIFYING_MODULE_SIGNATURE,
25 	VERIFYING_FIRMWARE_SIGNATURE,
26 	VERIFYING_KEXEC_PE_SIGNATURE,
27 	VERIFYING_KEY_SIGNATURE,
28 	VERIFYING_KEY_SELF_SIGNATURE,
29 	VERIFYING_UNSPECIFIED_SIGNATURE,
30 	NR__KEY_BEING_USED_FOR
31 };
32 extern const char *const key_being_used_for[NR__KEY_BEING_USED_FOR];
33 
34 #ifdef CONFIG_SYSTEM_DATA_VERIFICATION
35 
36 struct key;
37 struct pkcs7_message;
38 
39 extern int verify_pkcs7_signature(const void *data, size_t len,
40 				  const void *raw_pkcs7, size_t pkcs7_len,
41 				  struct key *trusted_keys,
42 				  enum key_being_used_for usage,
43 				  int (*view_content)(void *ctx,
44 						      const void *data, size_t len,
45 						      size_t asn1hdrlen),
46 				  void *ctx);
47 extern int verify_pkcs7_message_sig(const void *data, size_t len,
48 				    struct pkcs7_message *pkcs7,
49 				    struct key *trusted_keys,
50 				    enum key_being_used_for usage,
51 				    int (*view_content)(void *ctx,
52 							const void *data,
53 							size_t len,
54 							size_t asn1hdrlen),
55 				    void *ctx);
56 
57 #ifdef CONFIG_SIGNED_PE_FILE_VERIFICATION
58 extern int verify_pefile_signature(const void *pebuf, unsigned pelen,
59 				   struct key *trusted_keys,
60 				   enum key_being_used_for usage);
61 #endif
62 
63 #endif /* CONFIG_SYSTEM_DATA_VERIFICATION */
64 #endif /* _LINUX_VERIFY_PEFILE_H */
65