DANE support for X509_verify_cert()
Reviewed-by: Richard Levitte <levitte@openssl.org>
This commit is contained in:
Viktor Dukhovni
543
test/danetest.c
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543
test/danetest.c
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@@ -0,0 +1,543 @@
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/* danetest.c */
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/* ====================================================================
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* Copyright (c) 2015 The OpenSSL Project. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
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*
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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* endorse or promote products derived from this software without
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* prior written permission. For written permission, please contact
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* openssl-core@openssl.org.
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*
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* 5. Products derived from this software may not be called "OpenSSL"
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* nor may "OpenSSL" appear in their names without prior written
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* permission of the OpenSSL Project.
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*
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* 6. Redistributions of any form whatsoever must retain the following
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* acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit (http://www.openssl.org/)"
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*
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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* ====================================================================
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*/
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#include <stdio.h>
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#include <string.h>
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#include <ctype.h>
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#include <limits.h>
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#include <errno.h>
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#include <openssl/crypto.h>
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#include <openssl/evp.h>
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#include <openssl/x509.h>
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#include <openssl/ssl.h>
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#include <openssl/err.h>
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#include <openssl/conf.h>
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#ifndef OPENSSL_NO_ENGINE
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#include <openssl/engine.h>
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#endif
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#include "../e_os.h"
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static const char *progname;
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/*
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* Forward declaration, of function that uses internal interfaces, from headers
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* included at the end of this module.
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*/
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static void store_ctx_dane_init(X509_STORE_CTX *, SSL *);
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static int saved_errno;
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static void save_errno(void)
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{
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saved_errno = errno;
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}
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static int restore_errno(void)
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{
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int ret = errno;
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errno = saved_errno;
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return ret;
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}
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static void usage(void)
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{
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fprintf(stderr, "usage: %s: danetest basedomain CAfile tlsafile\n", progname);
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}
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static void print_errors(void)
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{
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unsigned long err;
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char buffer[1024];
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const char *file;
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const char *data;
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int line;
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int flags;
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while ((err = ERR_get_error_line_data(&file, &line, &data, &flags)) != 0) {
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ERR_error_string_n(err, buffer, sizeof(buffer));
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if (flags & ERR_TXT_STRING)
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fprintf(stderr, "Error: %s:%s:%d:%s\n", buffer, file, line, data);
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else
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fprintf(stderr, "Error: %s:%s:%d\n", buffer, file, line);
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}
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}
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static int verify_chain(SSL *ssl, STACK_OF(X509) *chain)
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{
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int ret;
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X509_STORE_CTX *store_ctx;
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SSL_CTX *ssl_ctx = SSL_get_SSL_CTX(ssl);
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X509_STORE *store = SSL_CTX_get_cert_store(ssl_ctx);
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int store_ctx_idx = SSL_get_ex_data_X509_STORE_CTX_idx();
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X509 *cert = sk_X509_value(chain, 0);
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if ((store_ctx = X509_STORE_CTX_new()) == NULL)
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return -1;
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if (!X509_STORE_CTX_init(store_ctx, store, cert, chain))
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return 0;
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X509_STORE_CTX_set_ex_data(store_ctx, store_ctx_idx, ssl);
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X509_STORE_CTX_set_default(store_ctx,
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SSL_is_server(ssl) ? "ssl_client" : "ssl_server");
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X509_VERIFY_PARAM_set1(X509_STORE_CTX_get0_param(store_ctx),
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SSL_get0_param(ssl));
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store_ctx_dane_init(store_ctx, ssl);
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if (SSL_get_verify_callback(ssl))
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X509_STORE_CTX_set_verify_cb(store_ctx, SSL_get_verify_callback(ssl));
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ret = X509_verify_cert(store_ctx);
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SSL_set_verify_result(ssl, X509_STORE_CTX_get_error(store_ctx));
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X509_STORE_CTX_cleanup(store_ctx);
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X509_STORE_CTX_free(store_ctx);
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return (ret);
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}
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static STACK_OF(X509) *load_chain(FILE *fp, int nelem)
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{
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int count;
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char *name = 0;
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char *header = 0;
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unsigned char *data = 0;
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long len;
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char *errtype = 0; /* if error: cert or pkey? */
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STACK_OF(X509) *chain;
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typedef X509 *(*d2i_X509_t)(X509 **, const unsigned char **, long);
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if ((chain = sk_X509_new_null()) == 0) {
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perror("malloc");
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exit(1);
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}
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for (count = 0;
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count < nelem && errtype == 0
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&& PEM_read(fp, &name, &header, &data, &len);
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++count) {
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const unsigned char *p = data;
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if (strcmp(name, PEM_STRING_X509) == 0
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|| strcmp(name, PEM_STRING_X509_TRUSTED) == 0
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|| strcmp(name, PEM_STRING_X509_OLD) == 0) {
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d2i_X509_t d = strcmp(name, PEM_STRING_X509_TRUSTED) ?
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d2i_X509_AUX : d2i_X509;
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X509 *cert = d(0, &p, len);
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if (cert == 0 || (p - data) != len)
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errtype = "certificate";
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else if (sk_X509_push(chain, cert) == 0) {
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perror("malloc");
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goto err;
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}
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} else {
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fprintf(stderr, "unexpected chain file object: %s\n", name);
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goto err;
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}
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/*
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* If any of these were null, PEM_read() would have failed.
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*/
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OPENSSL_free(name);
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OPENSSL_free(header);
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OPENSSL_free(data);
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}
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if (errtype) {
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fprintf(stderr, "error reading: malformed %s\n", errtype);
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goto err;
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}
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if (count == nelem) {
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ERR_clear_error();
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return chain;
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}
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err:
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/* Some other PEM read error */
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sk_X509_pop_free(chain, X509_free);
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print_errors();
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return NULL;
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}
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static char *read_to_eol(FILE *f)
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{
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static char buf[1024];
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int n;
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if (fgets(buf, sizeof(buf), f)== NULL)
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return NULL;
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n = strlen(buf);
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if (buf[n-1] != '\n') {
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if (n+1 == sizeof(buf)) {
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fprintf(stderr, "%s: warning: input too long\n", progname);
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} else {
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fprintf(stderr, "%s: warning: EOF before newline\n", progname);
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}
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return NULL;
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}
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/* Trim trailing whitespace */
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while (n > 0 && isspace(buf[n-1]))
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buf[--n] = '\0';
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return buf;
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}
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/*
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* Hex decoder that tolerates optional whitespace
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*/
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static ossl_ssize_t hexdecode(const char *in, void *result)
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{
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unsigned char **out = (unsigned char **)result;
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unsigned char *ret = OPENSSL_malloc(strlen(in)/2);
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unsigned char *cp = ret;
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uint8_t byte;
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int nibble = 0;
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if (ret == NULL)
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return -1;
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for (byte = 0; *in; ++in) {
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char c;
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if (isspace(*in))
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continue;
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c = tolower(*in);
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if ('0' <= c && c <= '9') {
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byte |= c - '0';
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} else if ('a' <= c && c <= 'f') {
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byte |= c - 'a' + 10;
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} else {
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OPENSSL_free(ret);
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return 0;
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}
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if ((nibble ^= 1) == 0) {
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*cp++ = byte;
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byte = 0;
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} else {
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byte <<= 4;
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}
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}
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if (nibble != 0) {
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OPENSSL_free(ret);
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return 0;
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}
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return cp - (*out = ret);
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}
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static ossl_ssize_t checked_uint8(const char *in, void *out)
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{
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uint8_t *result = (uint8_t *)out;
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const char *cp = in;
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char *endp;
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long v;
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int e;
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save_errno();
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v = strtol(cp, &endp, 10);
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e = restore_errno();
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if (((v == LONG_MIN || v == LONG_MAX) && e == ERANGE) ||
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endp == cp || !isspace(*endp) ||
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v != (*(uint8_t *)result = (uint8_t) v)) {
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return -1;
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}
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for (cp = endp; isspace(*cp); ++cp)
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continue;
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return cp - in;
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}
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static int tlsa_import_rr(SSL *ssl, const char *rrdata)
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{
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int ret;
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uint8_t usage;
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uint8_t selector;
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uint8_t mtype;
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unsigned char *data = NULL;
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const char *cp = rrdata;
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ossl_ssize_t len = 0;
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struct tlsa_field {
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void *var;
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const char *name;
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ossl_ssize_t (*parser)(const char *, void *);
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} tlsa_fields[] = {
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{ &usage, "usage", checked_uint8 },
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{ &selector, "selector", checked_uint8 },
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{ &mtype, "mtype", checked_uint8 },
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{ &data, "data", hexdecode },
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{ NULL, }
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};
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struct tlsa_field *f;
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for (f = tlsa_fields; f->var; ++f) {
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if ((len = f->parser(cp += len, f->var)) <= 0) {
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fprintf(stderr, "%s: warning: bad TLSA %s field in: %s\n",
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progname, f->name, rrdata);
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return 0;
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}
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}
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ret = SSL_dane_tlsa_add(ssl, usage, selector, mtype, data, len);
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OPENSSL_free(data);
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if (ret == 0) {
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print_errors();
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fprintf(stderr, "%s: warning: unusable TLSA rrdata: %s\n",
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progname, rrdata);
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return 0;
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}
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if (ret < 0) {
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fprintf(stderr, "%s: warning: error loading TLSA rrdata: %s\n",
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progname, rrdata);
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return 0;
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}
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return ret;
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}
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static int allws(const char *cp)
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{
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while (*cp)
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if (!isspace(*cp++))
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return 0;
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return 1;
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}
|
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static int test_tlsafile(SSL_CTX *ctx, const char *basename,
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FILE *f, const char *path)
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{
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char *line;
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int testno = 0;
|
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int ret = 1;
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SSL *ssl;
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|
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while (ret > 0 && (line = read_to_eol(f)) != NULL) {
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STACK_OF(X509) *chain;
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int ntlsa;
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int ncert;
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int want;
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int want_depth;
|
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int off;
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int i;
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int ok;
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int err;
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int mdpth;
|
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|
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if (*line == '\0' || *line == '#')
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continue;
|
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|
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++testno;
|
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if (sscanf(line, "%d %d %d %d%n", &ntlsa, &ncert, &want, &want_depth, &off) != 4
|
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|| !allws(line + off)) {
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fprintf(stderr, "Expected tlsa count, cert count and result"
|
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" at test %d of %s\n", testno, path);
|
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return 0;
|
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}
|
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|
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if ((ssl = SSL_new(ctx)) == NULL)
|
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return -1;
|
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SSL_set_connect_state(ssl);
|
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if (SSL_dane_enable(ssl, basename) <= 0) {
|
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SSL_free(ssl);
|
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return -1;
|
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}
|
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|
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for (i = 0; i < ntlsa; ++i) {
|
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if ((line = read_to_eol(f)) == NULL || !tlsa_import_rr(ssl, line)) {
|
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SSL_free(ssl);
|
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return 0;
|
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}
|
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}
|
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|
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/* Don't report old news */
|
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ERR_clear_error();
|
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chain = load_chain(f, ncert);
|
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if (chain == NULL) {
|
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SSL_free(ssl);
|
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return -1;
|
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}
|
||||
|
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ok = verify_chain(ssl, chain);
|
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sk_X509_pop_free(chain, X509_free);
|
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err = SSL_get_verify_result(ssl);
|
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mdpth = SSL_get0_dane_authority(ssl, NULL, NULL);
|
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SSL_free(ssl);
|
||||
|
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if (ok < 0) {
|
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ret = 0;
|
||||
fprintf(stderr, "verify_chain internal error in %s test %d\n",
|
||||
path, testno);
|
||||
print_errors();
|
||||
continue;
|
||||
}
|
||||
if (err != want || (want == 0 && !ok)) {
|
||||
ret = 0;
|
||||
if (err != want) {
|
||||
if (want == X509_V_OK)
|
||||
fprintf(stderr, "Verification failure in %s test %d: %d: %s\n",
|
||||
path, testno, err, X509_verify_cert_error_string(err));
|
||||
else
|
||||
fprintf(stderr, "Unexpected error in %s test %d: %d: wanted %d\n",
|
||||
path, testno, err, want);
|
||||
} else {
|
||||
fprintf(stderr, "Verification failure in %s test %d: ok=0\n",
|
||||
path, testno);
|
||||
}
|
||||
print_errors();
|
||||
continue;
|
||||
}
|
||||
if (mdpth != want_depth) {
|
||||
ret = 0;
|
||||
fprintf(stderr, "Wrong match depth, in %s test %d: wanted %d, got: %d\n",
|
||||
path, testno, want_depth, mdpth);
|
||||
}
|
||||
fprintf(stderr, "%s: test %d successful\n", path, testno);
|
||||
}
|
||||
ERR_clear_error();
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
int main(int argc, char *argv[])
|
||||
{
|
||||
progname = argv[0];
|
||||
FILE *f;
|
||||
BIO *bio_err;
|
||||
SSL_CTX *ctx = NULL;
|
||||
const char *basedomain;
|
||||
const char *CAfile;
|
||||
const char *tlsafile;
|
||||
int ret = 1;
|
||||
|
||||
if (argc != 4) {
|
||||
usage();
|
||||
EXIT(1);
|
||||
}
|
||||
basedomain = argv[1];
|
||||
CAfile = argv[2];
|
||||
tlsafile = argv[3];
|
||||
|
||||
f = fopen(tlsafile, "r");
|
||||
if (f == NULL) {
|
||||
fprintf(stderr, "%s: Error opening tlsa record file: '%s': %s\n",
|
||||
progname, tlsafile, strerror(errno));
|
||||
return 0;
|
||||
}
|
||||
|
||||
bio_err = BIO_new_fp(stderr, BIO_NOCLOSE | BIO_FP_TEXT);
|
||||
|
||||
/* enable memory leak checking unless explicitly disabled */
|
||||
if (!((getenv("OPENSSL_DEBUG_MEMORY") != NULL)
|
||||
&& (0 == strcmp(getenv("OPENSSL_DEBUG_MEMORY"), "off")))) {
|
||||
CRYPTO_malloc_debug_init();
|
||||
CRYPTO_set_mem_debug_options(V_CRYPTO_MDEBUG_ALL);
|
||||
} else {
|
||||
/* OPENSSL_DEBUG_MEMORY=off */
|
||||
CRYPTO_set_mem_debug_functions(0, 0, 0, 0, 0);
|
||||
}
|
||||
CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ON);
|
||||
|
||||
SSL_library_init();
|
||||
SSL_load_error_strings();
|
||||
|
||||
ctx = SSL_CTX_new(TLS_client_method());
|
||||
if (SSL_CTX_dane_enable(ctx) <= 0) {
|
||||
print_errors();
|
||||
goto end;
|
||||
}
|
||||
if (!SSL_CTX_load_verify_locations(ctx, CAfile, NULL)) {
|
||||
print_errors();
|
||||
goto end;
|
||||
}
|
||||
if ((SSL_CTX_dane_mtype_set(ctx, EVP_sha512(), 2, 1)) <= 0) {
|
||||
print_errors();
|
||||
goto end;
|
||||
}
|
||||
if ((SSL_CTX_dane_mtype_set(ctx, EVP_sha256(), 1, 2)) <= 0) {
|
||||
print_errors();
|
||||
goto end;
|
||||
}
|
||||
|
||||
if (test_tlsafile(ctx, argv[1], f, tlsafile) <= 0) {
|
||||
print_errors();
|
||||
goto end;
|
||||
}
|
||||
|
||||
ret = 0;
|
||||
|
||||
end:
|
||||
|
||||
(void) fclose(f);
|
||||
SSL_CTX_free(ctx);
|
||||
|
||||
#ifndef OPENSSL_NO_ENGINE
|
||||
ENGINE_cleanup();
|
||||
#endif
|
||||
CONF_modules_unload(1);
|
||||
CRYPTO_cleanup_all_ex_data();
|
||||
ERR_free_strings();
|
||||
ERR_remove_thread_state(NULL);
|
||||
EVP_cleanup();
|
||||
CRYPTO_mem_leaks(bio_err);
|
||||
BIO_free(bio_err);
|
||||
EXIT(ret);
|
||||
}
|
||||
|
||||
#include <internal/dane.h>
|
||||
|
||||
static void store_ctx_dane_init(X509_STORE_CTX *store_ctx, SSL *ssl)
|
||||
{
|
||||
X509_STORE_CTX_set0_dane(store_ctx, SSL_get0_dane(ssl));
|
||||
}
|
||||
Reference in New Issue
Block a user