include/linux/verification.h

   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 */