109 lines
2.7 KiB
C
109 lines
2.7 KiB
C
/* $OpenBSD: gbr.c,v 1.30 2024/02/21 09:17:06 tb Exp $ */
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/*
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* Copyright (c) 2020 Claudio Jeker <claudio@openbsd.org>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <err.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <openssl/x509.h>
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#include "extern.h"
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extern ASN1_OBJECT *gbr_oid;
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/*
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* Parse a full RFC 6493 file and signed by the certificate "cacert"
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* (the latter is optional and may be passed as NULL to disable).
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* Returns the payload or NULL if the document was malformed.
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*/
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struct gbr *
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gbr_parse(X509 **x509, const char *fn, int talid, const unsigned char *der,
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size_t len)
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{
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struct gbr *gbr;
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struct cert *cert = NULL;
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size_t cmsz;
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unsigned char *cms;
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time_t signtime = 0;
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cms = cms_parse_validate(x509, fn, der, len, gbr_oid, &cmsz, &signtime);
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if (cms == NULL)
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return NULL;
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if ((gbr = calloc(1, sizeof(*gbr))) == NULL)
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err(1, NULL);
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gbr->signtime = signtime;
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if ((gbr->vcard = strndup(cms, cmsz)) == NULL)
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err(1, NULL);
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free(cms);
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if (!x509_get_aia(*x509, fn, &gbr->aia))
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goto out;
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if (!x509_get_aki(*x509, fn, &gbr->aki))
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goto out;
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if (!x509_get_sia(*x509, fn, &gbr->sia))
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goto out;
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if (!x509_get_ski(*x509, fn, &gbr->ski))
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goto out;
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if (gbr->aia == NULL || gbr->aki == NULL || gbr->sia == NULL ||
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gbr->ski == NULL) {
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warnx("%s: RFC 6487 section 4.8: "
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"missing AIA, AKI, SIA or SKI X509 extension", fn);
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goto out;
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}
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if (!x509_get_notbefore(*x509, fn, &gbr->notbefore))
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goto out;
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if (!x509_get_notafter(*x509, fn, &gbr->notafter))
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goto out;
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if (!x509_inherits(*x509)) {
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warnx("%s: RFC 3779 extension not set to inherit", fn);
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goto out;
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}
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if ((cert = cert_parse_ee_cert(fn, talid, *x509)) == NULL)
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goto out;
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return gbr;
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out:
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gbr_free(gbr);
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X509_free(*x509);
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*x509 = NULL;
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cert_free(cert);
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return NULL;
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}
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/*
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* Free a GBR pointer.
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* Safe to call with NULL.
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*/
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void
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gbr_free(struct gbr *p)
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{
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if (p == NULL)
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return;
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free(p->aia);
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free(p->aki);
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free(p->sia);
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free(p->ski);
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free(p->vcard);
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free(p);
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}
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