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/* $OpenBSD: verify.c,v 1.5 2020/10/02 07:53:58 tb Exp $ */
/*
* Copyright (c) 2020 Joel Sing <jsing@openbsd.org>
* Copyright (c) 2020 Bob Beck <beck@openbsd.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 <err.h>
#include <string.h>
#include <sys/stat.h>
#include <openssl/bio.h>
#include <openssl/err.h>
#include <openssl/pem.h>
#include <openssl/x509.h>
#include <openssl/x509v3.h>
#include <openssl/x509_vfy.h>
static int verbose = 0;
static int json = 0; /* print out json like bettertls expects resuls in */
static int
passwd_cb(char *buf, int size, int rwflag, void *u)
{
memset(buf, 0, size);
return (0);
}
static int
certs_from_file(const char *filename, STACK_OF(X509) **certs)
{
STACK_OF(X509_INFO) *xis = NULL;
STACK_OF(X509) *xs = NULL;
BIO *bio = NULL;
X509 *x;
int i;
if ((xs = sk_X509_new_null()) == NULL)
errx(1, "failed to create X509 stack");
if ((bio = BIO_new_file(filename, "r")) == NULL) {
ERR_print_errors_fp(stderr);
errx(1, "failed to create bio");
}
if ((xis = PEM_X509_INFO_read_bio(bio, NULL, passwd_cb, NULL)) == NULL)
errx(1, "failed to read PEM");
for (i = 0; i < sk_X509_INFO_num(xis); i++) {
if ((x = sk_X509_INFO_value(xis, i)->x509) == NULL)
continue;
if (!sk_X509_push(xs, x))
errx(1, "failed to push X509");
X509_up_ref(x);
}
*certs = xs;
xs = NULL;
sk_X509_INFO_pop_free(xis, X509_INFO_free);
sk_X509_pop_free(xs, X509_free);
BIO_free(bio);
return 1;
}
static int
verify_cert_cb(int ok, X509_STORE_CTX *xsc)
{
X509 *current_cert;
int verify_err;
current_cert = X509_STORE_CTX_get_current_cert(xsc);
if (current_cert != NULL) {
X509_NAME_print_ex_fp(stderr,
X509_get_subject_name(current_cert), 0,
XN_FLAG_ONELINE);
fprintf(stderr, "\n");
}
verify_err = X509_STORE_CTX_get_error(xsc);
if (verify_err != X509_V_OK) {
fprintf(stderr, "verify error at depth %d: %s\n",
X509_STORE_CTX_get_error_depth(xsc),
X509_verify_cert_error_string(verify_err));
}
return ok;
}
static void
verify_cert(const char *roots_file, const char *bundle_file,
const char *cert_file, int *ip, int *dns)
{
STACK_OF(X509) *roots = NULL, *bundle = NULL, *cert = NULL;
X509_STORE_CTX *xsc = NULL;
X509_STORE *store = NULL;
X509_STORE_CTX *xscip = NULL;
X509_STORE *storeip = NULL;
X509_VERIFY_PARAM *param, *paramip;
X509 *leaf = NULL;
unsigned long flags, flagsip;
*ip = *dns = 0;
if (!certs_from_file(roots_file, &roots))
errx(1, "failed to load roots from '%s'", roots_file);
if (!certs_from_file(bundle_file, &bundle))
errx(1, "failed to load bundle from '%s'", bundle_file);
if (!certs_from_file(cert_file, &cert))
errx(1, "failed to load cert from '%s'", cert_file);
if (sk_X509_num(cert) < 1)
errx(1, "no certs in cert bundle %s", cert_file);
leaf = sk_X509_shift(cert);
if ((xsc = X509_STORE_CTX_new()) == NULL)
errx(1, "X509_STORE_CTX");
if ((store = X509_STORE_new()) == NULL)
errx(1, "X509_STORE");
if (!X509_STORE_CTX_init(xsc, store, leaf, bundle)) {
ERR_print_errors_fp(stderr);
errx(1, "failed to init store context");
}
X509_STORE_set_default_paths(store);
if (verbose)
X509_STORE_CTX_set_verify_cb(xsc, verify_cert_cb);
if ((param = X509_STORE_CTX_get0_param(xsc)) == NULL) {
ERR_print_errors_fp(stderr);
errx(1, "failed to get verify parameters");
}
flags = X509_VERIFY_PARAM_get_flags(param);
X509_VERIFY_PARAM_set_flags(param, flags);
X509_VERIFY_PARAM_set_time(param, 1600000000);
X509_VERIFY_PARAM_set1_host(param, "localhost.local",
strlen("localhost.local"));
X509_STORE_CTX_set0_trusted_stack(xsc, roots);
if (X509_verify_cert(xsc) == 1)
*dns = 1;
if ((xscip = X509_STORE_CTX_new()) == NULL)
errx(1, "X509_STORE_CTX");
if ((storeip = X509_STORE_new()) == NULL)
errx(1, "X509_STORE");
if (!X509_STORE_CTX_init(xscip, storeip, leaf, bundle)) {
ERR_print_errors_fp(stderr);
errx(1, "failed to init store context");
}
X509_STORE_set_default_paths(storeip);
if (verbose)
X509_STORE_CTX_set_verify_cb(xscip, verify_cert_cb);
if ((paramip = X509_STORE_CTX_get0_param(xscip)) == NULL) {
ERR_print_errors_fp(stderr);
errx(1, "failed to get verify parameters");
}
flagsip = X509_VERIFY_PARAM_get_flags(paramip);
X509_VERIFY_PARAM_set_flags(paramip, flagsip);
X509_VERIFY_PARAM_set_time(paramip, 1600000000);
X509_VERIFY_PARAM_set1_ip_asc(paramip, "127.0.0.1");
X509_STORE_CTX_set0_trusted_stack(xscip, roots);
if (X509_verify_cert(xscip) == 1)
*ip = 1;
sk_X509_pop_free(roots, X509_free);
sk_X509_pop_free(bundle, X509_free);
sk_X509_pop_free(cert, X509_free);
X509_STORE_free(store);
X509_STORE_free(storeip);
X509_STORE_CTX_free(xsc);
X509_STORE_CTX_free(xscip);
X509_free(leaf);
}
static void
bettertls_cert_test(const char *certs_path)
{
char *roots_file, *bundle_file, *cert_file;
int i;
if (asprintf(&roots_file, "%s/root.crt", certs_path) == -1)
errx(1, "asprintf");
for(i = 1;;i++) {
int ip, dns;
struct stat sb;
if (asprintf(&cert_file, "%s/%d.crt", certs_path, i) == -1)
errx(1, "asprintf");
if (asprintf(&bundle_file, "%s/%d.chain", certs_path, i) == -1)
errx(1, "asprintf");
if (stat(cert_file, &sb) == -1)
break;
if (stat(bundle_file, &sb) == -1)
break;
verify_cert(roots_file, bundle_file, cert_file, &ip, &dns);
/* Mmm. json. with my avocado toast */
if (i > 1 && json)
fprintf(stdout, ",");
if (json)
fprintf(stdout, "{\"id\":%d,\"dnsResult\":%s,\""
"ipResult\":%s}", i, dns ? "true" : "false",
ip ? "true" : "false");
else
fprintf(stdout, "%d,%s,%s\n", i, dns ? "OK" : "ERROR",
ip ? "OK" : "ERROR");
free(bundle_file);
free(cert_file);
}
free(roots_file);
}
int
main(int argc, char **argv)
{
if (argc != 2) {
fprintf(stderr, "usage: %s <certs_path>\n", argv[0]);
exit(1);
}
if (json)
fprintf(stdout, "{\"testVersion\":1,\"date\":%lld,\"userAgent\""
":\"LibreSSL OpenBSD 6.8\\n\",\"results\":[", time(NULL));
bettertls_cert_test(argv[1]);
if (json)
fprintf(stdout, "],\"osVersion\":\"OpenBSD 6.7\\n\"}\n");
return 0;
}
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