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436529562d
Allow X.509 certs to be blacklisted based on their TBSCertificate hash. This is convenient since we have to determine this anyway to be able to check the signature on an X.509 certificate. This is also what UEFI uses in its blacklist. If a certificate built into the kernel is blacklisted, something like the following might then be seen during boot: X.509: Cert 123412341234c55c1dcc601ab8e172917706aa32fb5eaf826813547fdf02dd46 is blacklisted Problem loading in-kernel X.509 certificate (-129) where the hex string shown is the blacklisted hash. Signed-off-by: David Howells <dhowells@redhat.com>
62 lines
2.3 KiB
C
62 lines
2.3 KiB
C
/* X.509 certificate parser internal definitions
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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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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public Licence
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* as published by the Free Software Foundation; either version
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* 2 of the Licence, or (at your option) any later version.
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*/
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#include <linux/time.h>
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#include <crypto/public_key.h>
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#include <keys/asymmetric-type.h>
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struct x509_certificate {
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struct x509_certificate *next;
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struct x509_certificate *signer; /* Certificate that signed this one */
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struct public_key *pub; /* Public key details */
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struct public_key_signature *sig; /* Signature parameters */
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char *issuer; /* Name of certificate issuer */
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char *subject; /* Name of certificate subject */
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struct asymmetric_key_id *id; /* Issuer + Serial number */
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struct asymmetric_key_id *skid; /* Subject + subjectKeyId (optional) */
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time64_t valid_from;
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time64_t valid_to;
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const void *tbs; /* Signed data */
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unsigned tbs_size; /* Size of signed data */
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unsigned raw_sig_size; /* Size of sigature */
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const void *raw_sig; /* Signature data */
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const void *raw_serial; /* Raw serial number in ASN.1 */
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unsigned raw_serial_size;
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unsigned raw_issuer_size;
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const void *raw_issuer; /* Raw issuer name in ASN.1 */
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const void *raw_subject; /* Raw subject name in ASN.1 */
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unsigned raw_subject_size;
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unsigned raw_skid_size;
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const void *raw_skid; /* Raw subjectKeyId in ASN.1 */
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unsigned index;
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bool seen; /* Infinite recursion prevention */
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bool verified;
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bool self_signed; /* T if self-signed (check unsupported_sig too) */
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bool unsupported_key; /* T if key uses unsupported crypto */
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bool unsupported_sig; /* T if signature uses unsupported crypto */
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bool blacklisted;
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};
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/*
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* x509_cert_parser.c
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*/
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extern void x509_free_certificate(struct x509_certificate *cert);
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extern struct x509_certificate *x509_cert_parse(const void *data, size_t datalen);
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extern int x509_decode_time(time64_t *_t, size_t hdrlen,
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unsigned char tag,
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const unsigned char *value, size_t vlen);
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/*
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* x509_public_key.c
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*/
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extern int x509_get_sig_params(struct x509_certificate *cert);
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extern int x509_check_for_self_signed(struct x509_certificate *cert);
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