13ea0450a9
UEFI related headers were copied from edk2. A new build option "MK_LOADER_EFI_SECUREBOOT" was added to allow loading of trusted anchors from UEFI. Certificate revocation support is also introduced. The forbidden certificates are loaded from dbx variable. Verification fails in two cases: There is a direct match between cert in dbx and the one in the chain. The CA used to sign the chain is found in dbx. One can also insert a hash of TBS section of a certificate into dbx. In this case verifications fails only if a direct match with a certificate in chain is found. Submitted by: Kornel Duleba <mindal@semihalf.com> Reviewed by: sjg Obtained from: Semihalf Sponsored by: Stormshield Differential Revision: https://reviews.freebsd.org/D19093
75 lines
2.2 KiB
C
75 lines
2.2 KiB
C
/*-
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* Copyright (c) 2019 Stormshield.
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* Copyright (c) 2019 Semihalf.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#define NEED_BRSSL_H
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#include "../libsecureboot-priv.h"
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#include <brssl.h>
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void
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ve_efi_init(void)
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{
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br_x509_certificate *xcs;
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hash_data *digests;
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size_t num;
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int result;
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static int once = 0;
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if (once > 0)
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return;
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once = 1;
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result = efi_secure_boot_enabled();
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if (result <= 0)
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return;
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xcs = efi_get_trusted_certs(&num);
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if (num > 0 && xcs != NULL) {
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num = ve_trust_anchors_add(xcs, num);
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free_certificates(xcs, num);
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}
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xcs = efi_get_forbidden_certs(&num);
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if (num > 0 && xcs != NULL) {
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num = ve_forbidden_anchors_add(xcs, num);
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free_certificates(xcs, num);
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}
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digests = efi_get_forbidden_digests(&num);
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if (num > 0 && digests != NULL) {
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ve_forbidden_digest_add(digests, num);
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/*
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* Don't free the buffors for digests,
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* since they are shallow copied.
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*/
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xfree(digests);
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}
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return;
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}
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