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722 lines
18 KiB
C
Executable File
722 lines
18 KiB
C
Executable File
/* $OpenBSD: ssl_cert.c,v 1.78 2020/06/05 17:55:24 jsing Exp $ */
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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* All rights reserved.
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*
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* This package is an SSL implementation written
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* by Eric Young (eay@cryptsoft.com).
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* The implementation was written so as to conform with Netscapes SSL.
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*
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* This library is free for commercial and non-commercial use as long as
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* the following conditions are aheared to. The following conditions
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* apply to all code found in this distribution, be it the RC4, RSA,
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation
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* included with this distribution is covered by the same copyright terms
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* except that the holder is Tim Hudson (tjh@cryptsoft.com).
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*
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* Copyright remains Eric Young's, and as such any Copyright notices in
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* the code are not to be removed.
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* If this package is used in a product, Eric Young should be given attribution
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* as the author of the parts of the library used.
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* This can be in the form of a textual message at program startup or
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* in documentation (online or textual) provided with the package.
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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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* 1. Redistributions of source code must retain the copyright
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* notice, this list of conditions and the following disclaimer.
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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 the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* "This product includes cryptographic software written by
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* Eric Young (eay@cryptsoft.com)"
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* The word 'cryptographic' can be left out if the rouines from the library
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* being used are not cryptographic related :-).
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* 4. If you include any Windows specific code (or a derivative thereof) from
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* the apps directory (application code) you must include an acknowledgement:
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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*
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* The licence and distribution terms for any publically available version or
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* derivative of this code cannot be changed. i.e. this code cannot simply be
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* copied and put under another distribution licence
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* [including the GNU Public Licence.]
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*/
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/* ====================================================================
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* Copyright (c) 1998-2007 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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* This product includes cryptographic software written by Eric Young
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* (eay@cryptsoft.com). This product includes software written by Tim
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* Hudson (tjh@cryptsoft.com).
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*
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*/
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/* ====================================================================
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* Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
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* ECC cipher suite support in OpenSSL originally developed by
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* SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
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*/
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#include <sys/types.h>
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#include <dirent.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <openssl/bio.h>
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#include <openssl/bn.h>
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#include <openssl/dh.h>
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#include <openssl/objects.h>
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#include <openssl/opensslconf.h>
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#include <openssl/pem.h>
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#include <openssl/x509v3.h>
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#include "ssl_locl.h"
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int
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SSL_get_ex_data_X509_STORE_CTX_idx(void)
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{
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static volatile int ssl_x509_store_ctx_idx = -1;
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int got_write_lock = 0;
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CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
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if (ssl_x509_store_ctx_idx < 0) {
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CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
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CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
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got_write_lock = 1;
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if (ssl_x509_store_ctx_idx < 0) {
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ssl_x509_store_ctx_idx =
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X509_STORE_CTX_get_ex_new_index(
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0, "SSL for verify callback", NULL, NULL, NULL);
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}
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}
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if (got_write_lock)
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CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
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else
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CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
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return ssl_x509_store_ctx_idx;
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}
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CERT *
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ssl_cert_new(void)
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{
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CERT *ret;
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ret = calloc(1, sizeof(CERT));
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if (ret == NULL) {
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SSLerrorx(ERR_R_MALLOC_FAILURE);
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return (NULL);
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}
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ret->key = &(ret->pkeys[SSL_PKEY_RSA]);
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ret->references = 1;
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return (ret);
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}
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CERT *
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ssl_cert_dup(CERT *cert)
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{
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CERT *ret;
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int i;
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ret = calloc(1, sizeof(CERT));
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if (ret == NULL) {
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SSLerrorx(ERR_R_MALLOC_FAILURE);
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return (NULL);
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}
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/*
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* same as ret->key = ret->pkeys + (cert->key - cert->pkeys),
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* if you find that more readable
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*/
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ret->key = &ret->pkeys[cert->key - &cert->pkeys[0]];
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ret->valid = cert->valid;
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ret->mask_k = cert->mask_k;
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ret->mask_a = cert->mask_a;
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if (cert->dh_tmp != NULL) {
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ret->dh_tmp = DHparams_dup(cert->dh_tmp);
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if (ret->dh_tmp == NULL) {
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SSLerrorx(ERR_R_DH_LIB);
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goto err;
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}
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if (cert->dh_tmp->priv_key) {
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BIGNUM *b = BN_dup(cert->dh_tmp->priv_key);
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if (!b) {
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SSLerrorx(ERR_R_BN_LIB);
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goto err;
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}
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ret->dh_tmp->priv_key = b;
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}
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if (cert->dh_tmp->pub_key) {
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BIGNUM *b = BN_dup(cert->dh_tmp->pub_key);
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if (!b) {
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SSLerrorx(ERR_R_BN_LIB);
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goto err;
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}
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ret->dh_tmp->pub_key = b;
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}
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}
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ret->dh_tmp_cb = cert->dh_tmp_cb;
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ret->dh_tmp_auto = cert->dh_tmp_auto;
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for (i = 0; i < SSL_PKEY_NUM; i++) {
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if (cert->pkeys[i].x509 != NULL) {
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ret->pkeys[i].x509 = cert->pkeys[i].x509;
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CRYPTO_add(&ret->pkeys[i].x509->references, 1,
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CRYPTO_LOCK_X509);
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}
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if (cert->pkeys[i].privatekey != NULL) {
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ret->pkeys[i].privatekey = cert->pkeys[i].privatekey;
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CRYPTO_add(&ret->pkeys[i].privatekey->references, 1,
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CRYPTO_LOCK_EVP_PKEY);
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switch (i) {
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/*
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* If there was anything special to do for
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* certain types of keys, we'd do it here.
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* (Nothing at the moment, I think.)
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*/
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case SSL_PKEY_RSA:
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/* We have an RSA key. */
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break;
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case SSL_PKEY_ECC:
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/* We have an ECC key */
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break;
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case SSL_PKEY_GOST01:
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/* We have a GOST key */
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break;
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default:
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/* Can't happen. */
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SSLerrorx(SSL_R_LIBRARY_BUG);
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}
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}
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if (cert->pkeys[i].chain != NULL) {
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if ((ret->pkeys[i].chain =
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X509_chain_up_ref(cert->pkeys[i].chain)) == NULL)
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goto err;
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}
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}
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/*
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* ret->extra_certs *should* exist, but currently the own certificate
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* chain is held inside SSL_CTX
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*/
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ret->references = 1;
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return (ret);
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err:
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DH_free(ret->dh_tmp);
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for (i = 0; i < SSL_PKEY_NUM; i++) {
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X509_free(ret->pkeys[i].x509);
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EVP_PKEY_free(ret->pkeys[i].privatekey);
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sk_X509_pop_free(ret->pkeys[i].chain, X509_free);
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}
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free (ret);
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return NULL;
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}
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void
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ssl_cert_free(CERT *c)
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{
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int i;
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if (c == NULL)
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return;
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i = CRYPTO_add(&c->references, -1, CRYPTO_LOCK_SSL_CERT);
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if (i > 0)
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return;
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DH_free(c->dh_tmp);
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for (i = 0; i < SSL_PKEY_NUM; i++) {
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X509_free(c->pkeys[i].x509);
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EVP_PKEY_free(c->pkeys[i].privatekey);
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sk_X509_pop_free(c->pkeys[i].chain, X509_free);
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}
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free(c);
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}
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int
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ssl_cert_set0_chain(CERT *c, STACK_OF(X509) *chain)
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{
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if (c->key == NULL)
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return 0;
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sk_X509_pop_free(c->key->chain, X509_free);
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c->key->chain = chain;
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return 1;
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}
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int
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ssl_cert_set1_chain(CERT *c, STACK_OF(X509) *chain)
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{
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STACK_OF(X509) *new_chain = NULL;
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if (chain != NULL) {
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if ((new_chain = X509_chain_up_ref(chain)) == NULL)
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return 0;
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}
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if (!ssl_cert_set0_chain(c, new_chain)) {
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sk_X509_pop_free(new_chain, X509_free);
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return 0;
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}
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return 1;
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}
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int
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ssl_cert_add0_chain_cert(CERT *c, X509 *cert)
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{
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if (c->key == NULL)
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return 0;
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if (c->key->chain == NULL) {
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if ((c->key->chain = sk_X509_new_null()) == NULL)
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return 0;
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}
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if (!sk_X509_push(c->key->chain, cert))
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return 0;
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return 1;
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}
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int
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ssl_cert_add1_chain_cert(CERT *c, X509 *cert)
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{
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if (!ssl_cert_add0_chain_cert(c, cert))
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return 0;
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X509_up_ref(cert);
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return 1;
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}
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SESS_CERT *
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ssl_sess_cert_new(void)
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{
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SESS_CERT *ret;
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ret = calloc(1, sizeof *ret);
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if (ret == NULL) {
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SSLerrorx(ERR_R_MALLOC_FAILURE);
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return NULL;
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}
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ret->peer_key = &(ret->peer_pkeys[SSL_PKEY_RSA]);
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ret->references = 1;
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return ret;
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}
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void
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ssl_sess_cert_free(SESS_CERT *sc)
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{
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int i;
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if (sc == NULL)
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return;
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i = CRYPTO_add(&sc->references, -1, CRYPTO_LOCK_SSL_SESS_CERT);
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if (i > 0)
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return;
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sk_X509_pop_free(sc->cert_chain, X509_free);
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for (i = 0; i < SSL_PKEY_NUM; i++)
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X509_free(sc->peer_pkeys[i].x509);
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DH_free(sc->peer_dh_tmp);
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EC_KEY_free(sc->peer_ecdh_tmp);
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free(sc->peer_x25519_tmp);
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free(sc);
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}
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int
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ssl_verify_cert_chain(SSL *s, STACK_OF(X509) *sk)
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{
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X509_STORE_CTX ctx;
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X509 *x;
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int ret;
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if ((sk == NULL) || (sk_X509_num(sk) == 0))
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return (0);
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x = sk_X509_value(sk, 0);
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if (!X509_STORE_CTX_init(&ctx, s->ctx->cert_store, x, sk)) {
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SSLerror(s, ERR_R_X509_LIB);
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return (0);
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}
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X509_STORE_CTX_set_ex_data(&ctx,
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SSL_get_ex_data_X509_STORE_CTX_idx(), s);
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/*
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* We need to inherit the verify parameters. These can be
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* determined by the context: if its a server it will verify
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* SSL client certificates or vice versa.
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*/
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X509_STORE_CTX_set_default(&ctx,
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s->server ? "ssl_client" : "ssl_server");
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/*
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* Anything non-default in "param" should overwrite anything
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* in the ctx.
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*/
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X509_VERIFY_PARAM_set1(X509_STORE_CTX_get0_param(&ctx), s->param);
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if (s->internal->verify_callback)
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X509_STORE_CTX_set_verify_cb(&ctx, s->internal->verify_callback);
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if (s->ctx->internal->app_verify_callback != NULL)
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ret = s->ctx->internal->app_verify_callback(&ctx,
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s->ctx->internal->app_verify_arg);
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else
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ret = X509_verify_cert(&ctx);
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s->verify_result = ctx.error;
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X509_STORE_CTX_cleanup(&ctx);
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return (ret);
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}
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static void
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set_client_CA_list(STACK_OF(X509_NAME) **ca_list,
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STACK_OF(X509_NAME) *name_list)
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{
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sk_X509_NAME_pop_free(*ca_list, X509_NAME_free);
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*ca_list = name_list;
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}
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STACK_OF(X509_NAME) *
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SSL_dup_CA_list(const STACK_OF(X509_NAME) *sk)
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{
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int i;
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STACK_OF(X509_NAME) *ret;
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X509_NAME *name = NULL;
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if ((ret = sk_X509_NAME_new_null()) == NULL)
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goto err;
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for (i = 0; i < sk_X509_NAME_num(sk); i++) {
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if ((name = X509_NAME_dup(sk_X509_NAME_value(sk, i))) == NULL)
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goto err;
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if (!sk_X509_NAME_push(ret, name))
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goto err;
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}
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return (ret);
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err:
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X509_NAME_free(name);
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sk_X509_NAME_pop_free(ret, X509_NAME_free);
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return NULL;
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}
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void
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SSL_set_client_CA_list(SSL *s, STACK_OF(X509_NAME) *name_list)
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{
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set_client_CA_list(&(s->internal->client_CA), name_list);
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}
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void
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SSL_CTX_set_client_CA_list(SSL_CTX *ctx, STACK_OF(X509_NAME) *name_list)
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{
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set_client_CA_list(&(ctx->internal->client_CA), name_list);
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}
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STACK_OF(X509_NAME) *
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SSL_CTX_get_client_CA_list(const SSL_CTX *ctx)
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{
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return (ctx->internal->client_CA);
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}
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STACK_OF(X509_NAME) *
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SSL_get_client_CA_list(const SSL *s)
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{
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if (s->internal->type == SSL_ST_CONNECT) {
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/* We are in the client. */
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if ((s->version >> 8) == SSL3_VERSION_MAJOR)
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return (S3I(s)->tmp.ca_names);
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else
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return (NULL);
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|
} else {
|
|
if (s->internal->client_CA != NULL)
|
|
return (s->internal->client_CA);
|
|
else
|
|
return (s->ctx->internal->client_CA);
|
|
}
|
|
}
|
|
|
|
static int
|
|
add_client_CA(STACK_OF(X509_NAME) **sk, X509 *x)
|
|
{
|
|
X509_NAME *name;
|
|
|
|
if (x == NULL)
|
|
return (0);
|
|
if ((*sk == NULL) && ((*sk = sk_X509_NAME_new_null()) == NULL))
|
|
return (0);
|
|
|
|
if ((name = X509_NAME_dup(X509_get_subject_name(x))) == NULL)
|
|
return (0);
|
|
|
|
if (!sk_X509_NAME_push(*sk, name)) {
|
|
X509_NAME_free(name);
|
|
return (0);
|
|
}
|
|
return (1);
|
|
}
|
|
|
|
int
|
|
SSL_add_client_CA(SSL *ssl, X509 *x)
|
|
{
|
|
return (add_client_CA(&(ssl->internal->client_CA), x));
|
|
}
|
|
|
|
int
|
|
SSL_CTX_add_client_CA(SSL_CTX *ctx, X509 *x)
|
|
{
|
|
return (add_client_CA(&(ctx->internal->client_CA), x));
|
|
}
|
|
|
|
static int
|
|
xname_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
|
|
{
|
|
return (X509_NAME_cmp(*a, *b));
|
|
}
|
|
|
|
/*!
|
|
* Load CA certs from a file into a ::STACK. Note that it is somewhat misnamed;
|
|
* it doesn't really have anything to do with clients (except that a common use
|
|
* for a stack of CAs is to send it to the client). Actually, it doesn't have
|
|
* much to do with CAs, either, since it will load any old cert.
|
|
* \param file the file containing one or more certs.
|
|
* \return a ::STACK containing the certs.
|
|
*/
|
|
STACK_OF(X509_NAME) *
|
|
SSL_load_client_CA_file(const char *file)
|
|
{
|
|
BIO *in;
|
|
X509 *x = NULL;
|
|
X509_NAME *xn = NULL;
|
|
STACK_OF(X509_NAME) *ret = NULL, *sk;
|
|
|
|
sk = sk_X509_NAME_new(xname_cmp);
|
|
|
|
in = BIO_new(BIO_s_file_internal());
|
|
|
|
if ((sk == NULL) || (in == NULL)) {
|
|
SSLerrorx(ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
|
|
if (!BIO_read_filename(in, file))
|
|
goto err;
|
|
|
|
for (;;) {
|
|
if (PEM_read_bio_X509(in, &x, NULL, NULL) == NULL)
|
|
break;
|
|
if (ret == NULL) {
|
|
ret = sk_X509_NAME_new_null();
|
|
if (ret == NULL) {
|
|
SSLerrorx(ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
}
|
|
if ((xn = X509_get_subject_name(x)) == NULL) goto err;
|
|
/* check for duplicates */
|
|
xn = X509_NAME_dup(xn);
|
|
if (xn == NULL)
|
|
goto err;
|
|
if (sk_X509_NAME_find(sk, xn) >= 0)
|
|
X509_NAME_free(xn);
|
|
else {
|
|
sk_X509_NAME_push(sk, xn);
|
|
sk_X509_NAME_push(ret, xn);
|
|
}
|
|
}
|
|
|
|
if (0) {
|
|
err:
|
|
sk_X509_NAME_pop_free(ret, X509_NAME_free);
|
|
ret = NULL;
|
|
}
|
|
sk_X509_NAME_free(sk);
|
|
BIO_free(in);
|
|
X509_free(x);
|
|
if (ret != NULL)
|
|
ERR_clear_error();
|
|
|
|
return (ret);
|
|
}
|
|
|
|
/*!
|
|
* Add a file of certs to a stack.
|
|
* \param stack the stack to add to.
|
|
* \param file the file to add from. All certs in this file that are not
|
|
* already in the stack will be added.
|
|
* \return 1 for success, 0 for failure. Note that in the case of failure some
|
|
* certs may have been added to \c stack.
|
|
*/
|
|
|
|
int
|
|
SSL_add_file_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
|
|
const char *file)
|
|
{
|
|
BIO *in;
|
|
X509 *x = NULL;
|
|
X509_NAME *xn = NULL;
|
|
int ret = 1;
|
|
int (*oldcmp)(const X509_NAME * const *a, const X509_NAME * const *b);
|
|
|
|
oldcmp = sk_X509_NAME_set_cmp_func(stack, xname_cmp);
|
|
|
|
in = BIO_new(BIO_s_file_internal());
|
|
|
|
if (in == NULL) {
|
|
SSLerrorx(ERR_R_MALLOC_FAILURE);
|
|
goto err;
|
|
}
|
|
|
|
if (!BIO_read_filename(in, file))
|
|
goto err;
|
|
|
|
for (;;) {
|
|
if (PEM_read_bio_X509(in, &x, NULL, NULL) == NULL)
|
|
break;
|
|
if ((xn = X509_get_subject_name(x)) == NULL) goto err;
|
|
xn = X509_NAME_dup(xn);
|
|
if (xn == NULL)
|
|
goto err;
|
|
if (sk_X509_NAME_find(stack, xn) >= 0)
|
|
X509_NAME_free(xn);
|
|
else
|
|
sk_X509_NAME_push(stack, xn);
|
|
}
|
|
|
|
ERR_clear_error();
|
|
|
|
if (0) {
|
|
err:
|
|
ret = 0;
|
|
}
|
|
BIO_free(in);
|
|
X509_free(x);
|
|
|
|
(void)sk_X509_NAME_set_cmp_func(stack, oldcmp);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*!
|
|
* Add a directory of certs to a stack.
|
|
* \param stack the stack to append to.
|
|
* \param dir the directory to append from. All files in this directory will be
|
|
* examined as potential certs. Any that are acceptable to
|
|
* SSL_add_dir_cert_subjects_to_stack() that are not already in the stack will
|
|
* be included.
|
|
* \return 1 for success, 0 for failure. Note that in the case of failure some
|
|
* certs may have been added to \c stack.
|
|
*/
|
|
|
|
int
|
|
SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack, const char *dir)
|
|
{
|
|
DIR *dirp = NULL;
|
|
char *path = NULL;
|
|
int ret = 0;
|
|
|
|
dirp = opendir(dir);
|
|
if (dirp) {
|
|
struct dirent *dp;
|
|
while ((dp = readdir(dirp)) != NULL) {
|
|
if (asprintf(&path, "%s/%s", dir, dp->d_name) != -1) {
|
|
ret = SSL_add_file_cert_subjects_to_stack(
|
|
stack, path);
|
|
free(path);
|
|
}
|
|
if (!ret)
|
|
break;
|
|
}
|
|
(void) closedir(dirp);
|
|
}
|
|
if (!ret) {
|
|
SYSerror(errno);
|
|
ERR_asprintf_error_data("opendir ('%s')", dir);
|
|
SSLerrorx(ERR_R_SYS_LIB);
|
|
}
|
|
return ret;
|
|
}
|