47 lines
1.2 KiB
C
47 lines
1.2 KiB
C
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/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* Module signature handling.
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*
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* Copyright (C) 2012 Red Hat, Inc. All Rights Reserved.
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* Written by David Howells (dhowells@redhat.com)
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*/
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#ifndef _LINUX_MODULE_SIGNATURE_H
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#define _LINUX_MODULE_SIGNATURE_H
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#include <linux/types.h>
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/* In stripped ARM and x86-64 modules, ~ is surprisingly rare. */
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#define MODULE_SIG_STRING "~Module signature appended~\n"
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enum pkey_id_type {
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PKEY_ID_PGP, /* OpenPGP generated key ID */
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PKEY_ID_X509, /* X.509 arbitrary subjectKeyIdentifier */
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PKEY_ID_PKCS7, /* Signature in PKCS#7 message */
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};
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/*
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* Module signature information block.
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*
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* The constituents of the signature section are, in order:
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*
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* - Signer's name
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* - Key identifier
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* - Signature data
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* - Information block
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*/
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struct module_signature {
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u8 algo; /* Public-key crypto algorithm [0] */
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u8 hash; /* Digest algorithm [0] */
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u8 id_type; /* Key identifier type [PKEY_ID_PKCS7] */
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u8 signer_len; /* Length of signer's name [0] */
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u8 key_id_len; /* Length of key identifier [0] */
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u8 __pad[3];
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__be32 sig_len; /* Length of signature data */
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};
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int mod_check_sig(const struct module_signature *ms, size_t file_len,
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const char *name);
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#endif /* _LINUX_MODULE_SIGNATURE_H */
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