| 1 | /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */ |
| 2 | /* |
| 3 | * Module signature handling. |
| 4 | * |
| 5 | * Copyright (C) 2012 Red Hat, Inc. All Rights Reserved. |
| 6 | * Written by David Howells (dhowells@redhat.com) |
| 7 | */ |
| 8 | |
| 9 | #ifndef _LINUX_MODULE_SIGNATURE_H |
| 10 | #define _LINUX_MODULE_SIGNATURE_H |
| 11 | |
| 12 | #include <linux/types.h> |
| 13 | |
| 14 | /* In stripped ARM and x86-64 modules, ~ is surprisingly rare. */ |
| 15 | #define MODULE_SIGNATURE_MARKER "~Module signature appended~\n" |
| 16 | |
| 17 | enum module_signature_type { |
| 18 | MODULE_SIGNATURE_TYPE_PKCS7 = 2, /* Signature in PKCS#7 message */ |
| 19 | }; |
| 20 | |
| 21 | /* |
| 22 | * Module signature information block. |
| 23 | * |
| 24 | * The constituents of the signature section are, in order: |
| 25 | * |
| 26 | * - Signer's name |
| 27 | * - Key identifier |
| 28 | * - Signature data |
| 29 | * - Information block |
| 30 | */ |
| 31 | struct module_signature { |
| 32 | __u8 algo; /* Public-key crypto algorithm [0] */ |
| 33 | __u8 hash; /* Digest algorithm [0] */ |
| 34 | __u8 id_type; /* Key identifier type [enum module_signature_type] */ |
| 35 | __u8 signer_len; /* Length of signer's name [0] */ |
| 36 | __u8 key_id_len; /* Length of key identifier [0] */ |
| 37 | __u8 __pad[3]; |
| 38 | __be32 sig_len; /* Length of signature data */ |
| 39 | }; |
| 40 | |
| 41 | #endif /* _LINUX_MODULE_SIGNATURE_H */ |