ssl_cert.c

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	memset(ret, 0 ,sizeof *ret);
	ret->peer_key = &(ret->peer_pkeys[SSL_PKEY_RSA_ENC]);
	ret->references = 1;

	return ret;
	}

void ssl_sess_cert_free(SESS_CERT *sc)
	{
	int i;

	if (sc == NULL)
		return;

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

	/* i == 0 */
	if (sc->cert_chain != NULL)
		sk_X509_pop_free(sc->cert_chain, X509_free);
	for (i = 0; i < SSL_PKEY_NUM; i++)
		{
		if (sc->peer_pkeys[i].x509 != NULL)
			X509_free(sc->peer_pkeys[i].x509);
#if 0 /* We don't have the peer's private key.  These lines are just
	   * here as a reminder that we're still using a not-quite-appropriate
	   * data structure. */
		if (sc->peer_pkeys[i].privatekey != NULL)
			EVP_PKEY_free(sc->peer_pkeys[i].privatekey);
#endif
		}

#ifndef OPENSSL_NO_RSA
	if (sc->peer_rsa_tmp != NULL)
		RSA_free(sc->peer_rsa_tmp);
#endif
#ifndef OPENSSL_NO_DH
	if (sc->peer_dh_tmp != NULL)
		DH_free(sc->peer_dh_tmp);
#endif
#ifndef OPENSSL_NO_ECDH
	if (sc->peer_ecdh_tmp != NULL)
		EC_KEY_free(sc->peer_ecdh_tmp);
#endif

	OPENSSL_free(sc);
	}

int ssl_set_peer_cert_type(SESS_CERT *sc,int type)
	{
	sc->peer_cert_type = type;
	return(1);
	}

int ssl_verify_cert_chain(SSL *s,STACK_OF(X509) *sk)
	{
	X509 *x;
	int i;
	X509_STORE_CTX ctx;

	if ((sk == NULL) || (sk_X509_num(sk) == 0))
		return(0);

	x=sk_X509_value(sk,0);
	if(!X509_STORE_CTX_init(&ctx,s->ctx->cert_store,x,sk))
		{
		SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN,ERR_R_X509_LIB);
		return(0);
		}
	if (s->param)
		X509_VERIFY_PARAM_inherit(X509_STORE_CTX_get0_param(&ctx),
						s->param);
#if 0
	if (SSL_get_verify_depth(s) >= 0)
		X509_STORE_CTX_set_depth(&ctx, SSL_get_verify_depth(s));
#endif
	X509_STORE_CTX_set_ex_data(&ctx,SSL_get_ex_data_X509_STORE_CTX_idx(),s);

	/* We need to inherit the verify parameters. These can be determined by
	 * the context: if its a server it will verify SSL client certificates
	 * or vice versa.
	 */

	X509_STORE_CTX_set_default(&ctx,
				s->server ? "ssl_client" : "ssl_server");

	if (s->verify_callback)
		X509_STORE_CTX_set_verify_cb(&ctx, s->verify_callback);

	if (s->ctx->app_verify_callback != NULL)
#if 1 /* new with OpenSSL 0.9.7 */
		i=s->ctx->app_verify_callback(&ctx, s->ctx->app_verify_arg); 
#else
		i=s->ctx->app_verify_callback(&ctx); /* should pass app_verify_arg */
#endif
	else
		{
#ifndef OPENSSL_NO_X509_VERIFY
		i=X509_verify_cert(&ctx);
#else
		i=0;
		ctx.error=X509_V_ERR_APPLICATION_VERIFICATION;
		SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN,SSL_R_NO_VERIFY_CALLBACK);
#endif
		}

	s->verify_result=ctx.error;
	X509_STORE_CTX_cleanup(&ctx);

	return(i);
	}

static void set_client_CA_list(STACK_OF(X509_NAME) **ca_list,STACK_OF(X509_NAME) *name_list)
	{
	if (*ca_list != NULL)
		sk_X509_NAME_pop_free(*ca_list,X509_NAME_free);

	*ca_list=name_list;
	}

STACK_OF(X509_NAME) *SSL_dup_CA_list(STACK_OF(X509_NAME) *sk)
	{
	int i;
	STACK_OF(X509_NAME) *ret;
	X509_NAME *name;

	ret=sk_X509_NAME_new_null();
	for (i=0; i<sk_X509_NAME_num(sk); i++)
		{
		name=X509_NAME_dup(sk_X509_NAME_value(sk,i));
		if ((name == NULL) || !sk_X509_NAME_push(ret,name))
			{
			sk_X509_NAME_pop_free(ret,X509_NAME_free);
			return(NULL);
			}
		}
	return(ret);
	}

void SSL_set_client_CA_list(SSL *s,STACK_OF(X509_NAME) *name_list)
	{
	set_client_CA_list(&(s->client_CA),name_list);
	}

void SSL_CTX_set_client_CA_list(SSL_CTX *ctx,STACK_OF(X509_NAME) *name_list)
	{
	set_client_CA_list(&(ctx->client_CA),name_list);
	}

STACK_OF(X509_NAME) *SSL_CTX_get_client_CA_list(const SSL_CTX *ctx)
	{
	return(ctx->client_CA);
	}

STACK_OF(X509_NAME) *SSL_get_client_CA_list(const SSL *s)
	{
	if (s->type == SSL_ST_CONNECT)
		{ /* we are in the client */
		if (((s->version>>8) == SSL3_VERSION_MAJOR) &&
			(s->s3 != NULL))
			return(s->s3->tmp.ca_names);
		else
			return(NULL);
		}
	else
		{
		if (s->client_CA != NULL)
			return(s->client_CA);
		else
			return(s->ctx->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->client_CA),x));
	}

int SSL_CTX_add_client_CA(SSL_CTX *ctx,X509 *x)
	{
	return(add_client_CA(&(ctx->client_CA),x));
	}

static int xname_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
	{
	return(X509_NAME_cmp(*a,*b));
	}

#ifndef OPENSSL_NO_STDIO
/*!
 * 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))
		{
		SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE,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)
				{
				SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE,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:
		if (ret != NULL) sk_X509_NAME_pop_free(ret,X509_NAME_free);
		ret=NULL;
		}
	if (sk != NULL) sk_X509_NAME_free(sk);
	if (in != NULL) BIO_free(in);
	if (x != NULL) X509_free(x);
	if (ret != NULL)
		ERR_clear_error();
	return(ret);
	}
#endif

/*!
 * 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)
		{
		SSLerr(SSL_F_SSL_ADD_FILE_CERT_SUBJECTS_TO_STACK,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);
		}

	if (0)
		{
err:
		ret=0;
		}
	if(in != NULL)
		BIO_free(in);
	if(x != NULL)
		X509_free(x);
	
	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)
	{
	OPENSSL_DIR_CTX *d = NULL;
	const char *filename;
	int ret = 0;

	CRYPTO_w_lock(CRYPTO_LOCK_READDIR);

	/* Note that a side effect is that the CAs will be sorted by name */

	while((filename = OPENSSL_DIR_read(&d, dir)))
		{
		char buf[1024];
		int r;

		if(strlen(dir)+strlen(filename)+2 > sizeof buf)
			{
			SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK,SSL_R_PATH_TOO_LONG);
			goto err;
			}

#ifdef OPENSSL_SYS_VMS
		r = BIO_snprintf(buf,sizeof buf,"%s%s",dir,filename);
#else
		r = BIO_snprintf(buf,sizeof buf,"%s/%s",dir,filename);
#endif
		if (r <= 0 || r >= (int)sizeof(buf))
			goto err;
		if(!SSL_add_file_cert_subjects_to_stack(stack,buf))
			goto err;
		}

	if (errno)
		{
		SYSerr(SYS_F_OPENDIR, get_last_sys_error());
		ERR_add_error_data(3, "OPENSSL_DIR_read(&ctx, '", dir, "')");
		SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK, ERR_R_SYS_LIB);
		goto err;
		}

	ret = 1;

err:
	if (d) OPENSSL_DIR_end(&d);
	CRYPTO_w_unlock(CRYPTO_LOCK_READDIR);
	return ret;
	}