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/* $OpenBSD: ca.c,v 1.3 2013/11/21 08:36:51 eric Exp $ */
/*
* Copyright (c) 2012 Gilles Chehade <gilles@poolp.org>
*
* 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 <sys/types.h>
#include <openssl/err.h>
#include <openssl/ssl.h>
#include "log.h"
int ca_X509_verify(X509 *, STACK_OF(X509) *, const char *, const char *, const char **);
static int
verify_cb(int ok, X509_STORE_CTX *ctx)
{
switch (X509_STORE_CTX_get_error(ctx)) {
case X509_V_OK:
break;
case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
log_warnx("warn: unable to get issuer cert");
break;
case X509_V_ERR_CERT_NOT_YET_VALID:
case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
log_warnx("warn: certificate not yet valid");
break;
case X509_V_ERR_CERT_HAS_EXPIRED:
case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
log_warnx("warn: certificate has expired");
break;
case X509_V_ERR_NO_EXPLICIT_POLICY:
log_warnx("warn: no explicit policy");
break;
}
return ok;
}
int
ca_X509_verify(X509 *certificate, STACK_OF(X509) *chain, const char *CAfile,
const char *CRLfile, const char **errstr)
{
X509_STORE *store = NULL;
X509_STORE_CTX *xsc = NULL;
int ret = 0;
if ((store = X509_STORE_new()) == NULL)
goto end;
if (! X509_STORE_load_locations(store, CAfile, NULL)) {
log_warn("warn: unable to load CA file %s", CAfile);
goto end;
}
X509_STORE_set_default_paths(store);
if ((xsc = X509_STORE_CTX_new()) == NULL)
goto end;
if (X509_STORE_CTX_init(xsc, store, certificate, chain) != 1)
goto end;
X509_STORE_CTX_set_verify_cb(xsc, verify_cb);
ret = X509_verify_cert(xsc);
end:
*errstr = NULL;
if (ret != 1) {
if (xsc)
*errstr = X509_verify_cert_error_string(xsc->error);
else if (ERR_peek_last_error())
*errstr = ERR_error_string(ERR_peek_last_error(), NULL);
}
if (xsc)
X509_STORE_CTX_free(xsc);
if (store)
X509_STORE_free(store);
return ret > 0 ? 1 : 0;
}
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