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