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31a6a07eef
EVM and other LSMs need the ability to query the secure boot status of the system, without directly calling the IMA arch_ima_get_secureboot function. Refactor the secure boot status check into a general function named arch_get_secureboot. Reported-and-suggested-by: Mimi Zohar <zohar@linux.ibm.com> Suggested-by: Roberto Sassu <roberto.sassu@huawei.com> Signed-off-by: Coiby Xu <coxu@redhat.com> Acked-by: Ard Biesheuvel <ardb@kernel.org> Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>
36 lines
1004 B
C
36 lines
1004 B
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* Copyright (C) 2018 IBM Corporation
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*/
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#include <linux/module.h>
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#include <linux/ima.h>
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#include <linux/secure_boot.h>
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/* secureboot arch rules */
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static const char * const sb_arch_rules[] = {
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#if !IS_ENABLED(CONFIG_KEXEC_SIG)
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"appraise func=KEXEC_KERNEL_CHECK appraise_type=imasig",
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#endif /* CONFIG_KEXEC_SIG */
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"measure func=KEXEC_KERNEL_CHECK",
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#if !IS_ENABLED(CONFIG_MODULE_SIG)
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"appraise func=MODULE_CHECK appraise_type=imasig",
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#endif
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#if IS_ENABLED(CONFIG_INTEGRITY_MACHINE_KEYRING) && IS_ENABLED(CONFIG_IMA_KEYRINGS_PERMIT_SIGNED_BY_BUILTIN_OR_SECONDARY)
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"appraise func=POLICY_CHECK appraise_type=imasig",
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#endif
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"measure func=MODULE_CHECK",
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NULL
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};
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const char * const *arch_get_ima_policy(void)
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{
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if (IS_ENABLED(CONFIG_IMA_ARCH_POLICY) && arch_get_secureboot()) {
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if (IS_ENABLED(CONFIG_MODULE_SIG))
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set_module_sig_enforced();
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if (IS_ENABLED(CONFIG_KEXEC_SIG))
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set_kexec_sig_enforced();
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return sb_arch_rules;
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}
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return NULL;
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}
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