ssl_cert.c

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/*! \file ssl/ssl_cert.c */
/* Copyright (C) 1995-1998 Eric Young ([e-mail])
 * All rights reserved.
 *
 * This package is an SSL implementation written
 * by Eric Young ([e-mail]).
 * The implementation was written so as to conform with Netscapes SSL.
 * 
 * This library is free for commercial and non-commercial use as long as
 * the following conditions are aheared to.  The following conditions
 * apply to all code found in this distribution, be it the RC4, RSA,
 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
 * included with this distribution is covered by the same copyright terms
 * except that the holder is Tim Hudson ([e-mail]).
 * 
 * Copyright remains Eric Young's, and as such any Copyright notices in
 * the code are not to be removed.
 * If this package is used in a product, Eric Young should be given attribution
 * as the author of the parts of the library used.
 * This can be in the form of a textual message at program startup or
 * in documentation (online or textual) provided with the package.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *    "This product includes cryptographic software written by
 *     Eric Young ([e-mail])"
 *    The word 'cryptographic' can be left out if the rouines from the library
 *    being used are not cryptographic related :-).
 * 4. If you include any Windows specific code (or a derivative thereof) from 
 *    the apps directory (application code) you must include an acknowledgement:
 *    "This product includes software written by Tim Hudson ([e-mail])"
 * 
 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * 
 * The licence and distribution terms for any publically available version or
 * derivative of this code cannot be changed.  i.e. this code cannot simply be
 * copied and put under another distribution licence
 * [including the GNU Public Licence.]
 */
/* ====================================================================
 * Copyright (c) 1999 The OpenSSL Project.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer. 
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. All advertising materials mentioning features or use of this
 *    software must display the following acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
 *
 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    [e-mail].
 *
 * 5. Products derived from this software may not be called "OpenSSL"
 *    nor may "OpenSSL" appear in their names without prior written
 *    permission of the OpenSSL Project.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
 *
 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 * ====================================================================
 */
/* ====================================================================
 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
 * ECC cipher suite support in OpenSSL originally developed by 
 * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
 */

#include <stdio.h>

#include "e_os.h"
#ifndef NO_SYS_TYPES_H
# include <sys/types.h>
#endif

#include "o_dir.h"
#include <openssl/objects.h>
#include <openssl/bio.h>
#include <openssl/pem.h>
#include <openssl/x509v3.h>
#ifndef OPENSSL_NO_DH
#include <openssl/dh.h>
#endif
#include <openssl/bn.h>
#include "ssl_locl.h"

int SSL_get_ex_data_X509_STORE_CTX_idx(void)
	{
	static volatile int ssl_x509_store_ctx_idx= -1;

	if (ssl_x509_store_ctx_idx < 0)
		{
		/* any write lock will do; usually this branch
		 * will only be taken once anyway */
		CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
		
		if (ssl_x509_store_ctx_idx < 0)
			{
			ssl_x509_store_ctx_idx=X509_STORE_CTX_get_ex_new_index(
				0,"SSL for verify callback",NULL,NULL,NULL);
			}
		
		CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
		}
	return ssl_x509_store_ctx_idx;
	}

CERT *ssl_cert_new(void)
	{
	CERT *ret;

	ret=(CERT *)OPENSSL_malloc(sizeof(CERT));
	if (ret == NULL)
		{
		SSLerr(SSL_F_SSL_CERT_NEW,ERR_R_MALLOC_FAILURE);
		return(NULL);
		}
	memset(ret,0,sizeof(CERT));

	ret->key= &(ret->pkeys[SSL_PKEY_RSA_ENC]);
	ret->references=1;

	return(ret);
	}

CERT *ssl_cert_dup(CERT *cert)
	{
	CERT *ret;
	int i;

	ret = (CERT *)OPENSSL_malloc(sizeof(CERT));
	if (ret == NULL)
		{
		SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
		return(NULL);
		}

	memset(ret, 0, sizeof(CERT));

	ret->key = &ret->pkeys[cert->key - &cert->pkeys[0]];
	/* or ret->key = ret->pkeys + (cert->key - cert->pkeys),
	 * if you find that more readable */

	ret->valid = cert->valid;
	ret->mask = cert->mask;
	ret->export_mask = cert->export_mask;

#ifndef OPENSSL_NO_RSA
	if (cert->rsa_tmp != NULL)
		{
		RSA_up_ref(cert->rsa_tmp);
		ret->rsa_tmp = cert->rsa_tmp;
		}
	ret->rsa_tmp_cb = cert->rsa_tmp_cb;
#endif

#ifndef OPENSSL_NO_DH
	if (cert->dh_tmp != NULL)
		{
		ret->dh_tmp = DHparams_dup(cert->dh_tmp);
		if (ret->dh_tmp == NULL)
			{
			SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_DH_LIB);
			goto err;
			}
		if (cert->dh_tmp->priv_key)
			{
			BIGNUM *b = BN_dup(cert->dh_tmp->priv_key);
			if (!b)
				{
				SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_BN_LIB);
				goto err;
				}
			ret->dh_tmp->priv_key = b;
			}
		if (cert->dh_tmp->pub_key)
			{
			BIGNUM *b = BN_dup(cert->dh_tmp->pub_key);
			if (!b)
				{
				SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_BN_LIB);
				goto err;
				}
			ret->dh_tmp->pub_key = b;
			}
		}
	ret->dh_tmp_cb = cert->dh_tmp_cb;
#endif

#ifndef OPENSSL_NO_ECDH
	if (cert->ecdh_tmp)
		{
		ret->ecdh_tmp = EC_KEY_dup(cert->ecdh_tmp);
		if (ret->ecdh_tmp == NULL)
			{
			SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_EC_LIB);
			goto err;
			}
		}
	ret->ecdh_tmp_cb = cert->ecdh_tmp_cb;
#endif

	for (i = 0; i < SSL_PKEY_NUM; i++)
		{
		if (cert->pkeys[i].x509 != NULL)
			{
			ret->pkeys[i].x509 = cert->pkeys[i].x509;
			CRYPTO_add(&ret->pkeys[i].x509->references, 1,
				CRYPTO_LOCK_X509);
			}
		
		if (cert->pkeys[i].privatekey != NULL)
			{
			ret->pkeys[i].privatekey = cert->pkeys[i].privatekey;
			CRYPTO_add(&ret->pkeys[i].privatekey->references, 1,
				CRYPTO_LOCK_EVP_PKEY);

			switch(i) 
				{
				/* If there was anything special to do for
				 * certain types of keys, we'd do it here.
				 * (Nothing at the moment, I think.) */

			case SSL_PKEY_RSA_ENC:
			case SSL_PKEY_RSA_SIGN:
				/* We have an RSA key. */
				break;
				
			case SSL_PKEY_DSA_SIGN:
				/* We have a DSA key. */
				break;
				
			case SSL_PKEY_DH_RSA:
			case SSL_PKEY_DH_DSA:
				/* We have a DH key. */
				break;

			case SSL_PKEY_ECC:
				/* We have an ECC key */
				break;

			default:
				/* Can't happen. */
				SSLerr(SSL_F_SSL_CERT_DUP, SSL_R_LIBRARY_BUG);
				}
			}
		}
	
	/* ret->extra_certs *should* exist, but currently the own certificate
	 * chain is held inside SSL_CTX */

	ret->references=1;

	return(ret);
	
#ifndef OPENSSL_NO_DH /* avoid 'unreferenced label' warning if OPENSSL_NO_DH is defined */
err:
#endif
#ifndef OPENSSL_NO_RSA
	if (ret->rsa_tmp != NULL)
		RSA_free(ret->rsa_tmp);
#endif
#ifndef OPENSSL_NO_DH
	if (ret->dh_tmp != NULL)
		DH_free(ret->dh_tmp);
#endif
#ifndef OPENSSL_NO_ECDH
	if (ret->ecdh_tmp != NULL)
		EC_KEY_free(ret->ecdh_tmp);
#endif

	for (i = 0; i < SSL_PKEY_NUM; i++)
		{
		if (ret->pkeys[i].x509 != NULL)
			X509_free(ret->pkeys[i].x509);
		if (ret->pkeys[i].privatekey != NULL)
			EVP_PKEY_free(ret->pkeys[i].privatekey);
		}

	return NULL;
	}


void ssl_cert_free(CERT *c)
	{
	int i;

	if(c == NULL)
	    return;

	i=CRYPTO_add(&c->references,-1,CRYPTO_LOCK_SSL_CERT);
#ifdef REF_PRINT
	REF_PRINT("CERT",c);
#endif
	if (i > 0) return;
#ifdef REF_CHECK
	if (i < 0)
		{
		fprintf(stderr,"ssl_cert_free, bad reference count\n");
		abort(); /* ok */
		}
#endif

#ifndef OPENSSL_NO_RSA
	if (c->rsa_tmp) RSA_free(c->rsa_tmp);
#endif
#ifndef OPENSSL_NO_DH
	if (c->dh_tmp) DH_free(c->dh_tmp);
#endif
#ifndef OPENSSL_NO_ECDH
	if (c->ecdh_tmp) EC_KEY_free(c->ecdh_tmp);
#endif

	for (i=0; i<SSL_PKEY_NUM; i++)
		{
		if (c->pkeys[i].x509 != NULL)
			X509_free(c->pkeys[i].x509);
		if (c->pkeys[i].privatekey != NULL)
			EVP_PKEY_free(c->pkeys[i].privatekey);
#if 0
		if (c->pkeys[i].publickey != NULL)
			EVP_PKEY_free(c->pkeys[i].publickey);
#endif
		}
	OPENSSL_free(c);
	}

int ssl_cert_inst(CERT **o)
	{
	/* Create a CERT if there isn't already one
	 * (which cannot really happen, as it is initially created in
	 * SSL_CTX_new; but the earlier code usually allows for that one
	 * being non-existant, so we follow that behaviour, as it might
	 * turn out that there actually is a reason for it -- but I'm
	 * not sure that *all* of the existing code could cope with
	 * s->cert being NULL, otherwise we could do without the
	 * initialization in SSL_CTX_new).
	 */
	
	if (o == NULL) 
		{
		SSLerr(SSL_F_SSL_CERT_INST, ERR_R_PASSED_NULL_PARAMETER);
		return(0);
		}
	if (*o == NULL)
		{
		if ((*o = ssl_cert_new()) == NULL)
			{
			SSLerr(SSL_F_SSL_CERT_INST, ERR_R_MALLOC_FAILURE);
			return(0);
			}
		}
	return(1);
	}


SESS_CERT *ssl_sess_cert_new(void)
	{
	SESS_CERT *ret;

	ret = OPENSSL_malloc(sizeof *ret);
	if (ret == NULL)
		{
		SSLerr(SSL_F_SSL_SESS_CERT_NEW, ERR_R_MALLOC_FAILURE);
		return NULL;
		}