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/* $OpenBSD: crl.c,v 1.22 2023/02/21 10:18:47 tb Exp $ */
/*
* Copyright (c) 2019 Kristaps Dzonsons <kristaps@bsd.lv>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <err.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "extern.h"
struct crl *
crl_parse(const char *fn, const unsigned char *der, size_t len)
{
const unsigned char *oder;
struct crl *crl;
const ASN1_TIME *at;
int rc = 0;
/* just fail for empty buffers, the warning was printed elsewhere */
if (der == NULL)
return NULL;
if ((crl = calloc(1, sizeof(*crl))) == NULL)
err(1, NULL);
oder = der;
if ((crl->x509_crl = d2i_X509_CRL(NULL, &der, len)) == NULL) {
cryptowarnx("%s: d2i_X509_CRL", fn);
goto out;
}
if (der != oder + len) {
warnx("%s: %td bytes trailing garbage", fn, oder + len - der);
goto out;
}
if ((crl->aki = x509_crl_get_aki(crl->x509_crl, fn)) == NULL) {
warnx("x509_crl_get_aki failed");
goto out;
}
at = X509_CRL_get0_lastUpdate(crl->x509_crl);
if (at == NULL) {
warnx("%s: X509_CRL_get0_lastUpdate failed", fn);
goto out;
}
if (!x509_get_time(at, &crl->issued)) {
warnx("%s: ASN1_time_parse failed", fn);
goto out;
}
at = X509_CRL_get0_nextUpdate(crl->x509_crl);
if (at == NULL) {
warnx("%s: X509_CRL_get0_nextUpdate failed", fn);
goto out;
}
if (!x509_get_time(at, &crl->expires)) {
warnx("%s: ASN1_time_parse failed", fn);
goto out;
}
rc = 1;
out:
if (rc == 0) {
crl_free(crl);
crl = NULL;
}
return crl;
}
static inline int
crlcmp(struct crl *a, struct crl *b)
{
return strcmp(a->aki, b->aki);
}
RB_GENERATE_STATIC(crl_tree, crl, entry, crlcmp);
/*
* Find a CRL based on the auth SKI value.
*/
struct crl *
crl_get(struct crl_tree *crlt, const struct auth *a)
{
struct crl find;
if (a == NULL)
return NULL;
find.aki = a->cert->ski;
return RB_FIND(crl_tree, crlt, &find);
}
int
crl_insert(struct crl_tree *crlt, struct crl *crl)
{
return RB_INSERT(crl_tree, crlt, crl) == NULL;
}
void
crl_free(struct crl *crl)
{
if (crl == NULL)
return;
free(crl->aki);
X509_CRL_free(crl->x509_crl);
free(crl);
}
void
crl_tree_free(struct crl_tree *crlt)
{
struct crl *crl, *tcrl;
RB_FOREACH_SAFE(crl, crl_tree, crlt, tcrl) {
RB_REMOVE(crl_tree, crlt, crl);
crl_free(crl);
}
}
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