forked from mirrors/linux
f3cf4134c5
Add the bpf_lookup_user_key(), bpf_lookup_system_key() and bpf_key_put() kfuncs, to respectively search a key with a given key handle serial number and flags, obtain a key from a pre-determined ID defined in include/linux/verification.h, and cleanup. Introduce system_keyring_id_check() to validate the keyring ID parameter of bpf_lookup_system_key(). Signed-off-by: Roberto Sassu <roberto.sassu@huawei.com> Acked-by: Kumar Kartikeya Dwivedi <memxor@gmail.com> Acked-by: Song Liu <song@kernel.org> Link: https://lore.kernel.org/r/20220920075951.929132-8-roberto.sassu@huaweicloud.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
72 lines
1.9 KiB
C
72 lines
1.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/* Signature verification
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*
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* Copyright (C) 2014 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_VERIFICATION_H
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#define _LINUX_VERIFICATION_H
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#include <linux/types.h>
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/*
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* Indicate that both builtin trusted keys and secondary trusted keys
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* should be used.
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*/
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#define VERIFY_USE_SECONDARY_KEYRING ((struct key *)1UL)
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#define VERIFY_USE_PLATFORM_KEYRING ((struct key *)2UL)
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static inline int system_keyring_id_check(u64 id)
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{
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if (id > (unsigned long)VERIFY_USE_PLATFORM_KEYRING)
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return -EINVAL;
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return 0;
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}
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/*
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* The use to which an asymmetric key is being put.
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*/
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enum key_being_used_for {
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VERIFYING_MODULE_SIGNATURE,
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VERIFYING_FIRMWARE_SIGNATURE,
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VERIFYING_KEXEC_PE_SIGNATURE,
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VERIFYING_KEY_SIGNATURE,
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VERIFYING_KEY_SELF_SIGNATURE,
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VERIFYING_UNSPECIFIED_SIGNATURE,
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NR__KEY_BEING_USED_FOR
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};
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extern const char *const key_being_used_for[NR__KEY_BEING_USED_FOR];
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#ifdef CONFIG_SYSTEM_DATA_VERIFICATION
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struct key;
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struct pkcs7_message;
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extern int verify_pkcs7_signature(const void *data, size_t len,
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const void *raw_pkcs7, size_t pkcs7_len,
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struct key *trusted_keys,
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enum key_being_used_for usage,
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int (*view_content)(void *ctx,
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const void *data, size_t len,
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size_t asn1hdrlen),
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void *ctx);
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extern int verify_pkcs7_message_sig(const void *data, size_t len,
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struct pkcs7_message *pkcs7,
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struct key *trusted_keys,
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enum key_being_used_for usage,
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int (*view_content)(void *ctx,
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const void *data,
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size_t len,
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size_t asn1hdrlen),
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void *ctx);
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#ifdef CONFIG_SIGNED_PE_FILE_VERIFICATION
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extern int verify_pefile_signature(const void *pebuf, unsigned pelen,
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struct key *trusted_keys,
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enum key_being_used_for usage);
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#endif
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#endif /* CONFIG_SYSTEM_DATA_VERIFICATION */
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#endif /* _LINUX_VERIFY_PEFILE_H */
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