1 /*! \file ssl/ssl_cert.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
58 /* ====================================================================
59 * Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved.
61 * Redistribution and use in source and binary forms, with or without
62 * modification, are permitted provided that the following conditions
65 * 1. Redistributions of source code must retain the above copyright
66 * notice, this list of conditions and the following disclaimer.
68 * 2. Redistributions in binary form must reproduce the above copyright
69 * notice, this list of conditions and the following disclaimer in
70 * the documentation and/or other materials provided with the
73 * 3. All advertising materials mentioning features or use of this
74 * software must display the following acknowledgment:
75 * "This product includes software developed by the OpenSSL Project
76 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
78 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
79 * endorse or promote products derived from this software without
80 * prior written permission. For written permission, please contact
81 * openssl-core@openssl.org.
83 * 5. Products derived from this software may not be called "OpenSSL"
84 * nor may "OpenSSL" appear in their names without prior written
85 * permission of the OpenSSL Project.
87 * 6. Redistributions of any form whatsoever must retain the following
89 * "This product includes software developed by the OpenSSL Project
90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
92 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
93 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
94 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
95 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
96 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
97 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
98 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
99 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
100 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
101 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
102 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
103 * OF THE POSSIBILITY OF SUCH DAMAGE.
104 * ====================================================================
106 * This product includes cryptographic software written by Eric Young
107 * (eay@cryptsoft.com). This product includes software written by Tim
108 * Hudson (tjh@cryptsoft.com).
111 /* ====================================================================
112 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
113 * ECC cipher suite support in OpenSSL originally developed by
114 * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
120 #ifndef NO_SYS_TYPES_H
121 # include <sys/types.h>
125 #include <openssl/objects.h>
126 #include <openssl/bio.h>
127 #include <openssl/pem.h>
128 #include <openssl/x509v3.h>
129 #ifndef OPENSSL_NO_DH
130 #include <openssl/dh.h>
132 #include <openssl/bn.h>
133 #include "ssl_locl.h"
135 int SSL_get_ex_data_X509_STORE_CTX_idx(void)
137 static volatile int ssl_x509_store_ctx_idx= -1;
138 int got_write_lock = 0;
140 CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
142 if (ssl_x509_store_ctx_idx < 0)
144 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
145 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
148 if (ssl_x509_store_ctx_idx < 0)
150 ssl_x509_store_ctx_idx=X509_STORE_CTX_get_ex_new_index(
151 0,"SSL for verify callback",NULL,NULL,NULL);
156 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
158 CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
160 return ssl_x509_store_ctx_idx;
163 CERT *ssl_cert_new(void)
167 ret=(CERT *)OPENSSL_malloc(sizeof(CERT));
170 SSLerr(SSL_F_SSL_CERT_NEW,ERR_R_MALLOC_FAILURE);
173 memset(ret,0,sizeof(CERT));
175 ret->key= &(ret->pkeys[SSL_PKEY_RSA_ENC]);
181 CERT *ssl_cert_dup(CERT *cert)
186 ret = (CERT *)OPENSSL_malloc(sizeof(CERT));
189 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_MALLOC_FAILURE);
193 memset(ret, 0, sizeof(CERT));
195 ret->key = &ret->pkeys[cert->key - &cert->pkeys[0]];
196 /* or ret->key = ret->pkeys + (cert->key - cert->pkeys),
197 * if you find that more readable */
199 ret->valid = cert->valid;
200 ret->mask_k = cert->mask_k;
201 ret->mask_a = cert->mask_a;
202 ret->export_mask_k = cert->export_mask_k;
203 ret->export_mask_a = cert->export_mask_a;
205 #ifndef OPENSSL_NO_RSA
206 if (cert->rsa_tmp != NULL)
208 RSA_up_ref(cert->rsa_tmp);
209 ret->rsa_tmp = cert->rsa_tmp;
211 ret->rsa_tmp_cb = cert->rsa_tmp_cb;
214 #ifndef OPENSSL_NO_DH
215 if (cert->dh_tmp != NULL)
217 ret->dh_tmp = DHparams_dup(cert->dh_tmp);
218 if (ret->dh_tmp == NULL)
220 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_DH_LIB);
223 if (cert->dh_tmp->priv_key)
225 BIGNUM *b = BN_dup(cert->dh_tmp->priv_key);
228 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_BN_LIB);
231 ret->dh_tmp->priv_key = b;
233 if (cert->dh_tmp->pub_key)
235 BIGNUM *b = BN_dup(cert->dh_tmp->pub_key);
238 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_BN_LIB);
241 ret->dh_tmp->pub_key = b;
244 ret->dh_tmp_cb = cert->dh_tmp_cb;
247 #ifndef OPENSSL_NO_ECDH
250 ret->ecdh_tmp = EC_KEY_dup(cert->ecdh_tmp);
251 if (ret->ecdh_tmp == NULL)
253 SSLerr(SSL_F_SSL_CERT_DUP, ERR_R_EC_LIB);
257 ret->ecdh_tmp_cb = cert->ecdh_tmp_cb;
260 for (i = 0; i < SSL_PKEY_NUM; i++)
262 if (cert->pkeys[i].x509 != NULL)
264 ret->pkeys[i].x509 = cert->pkeys[i].x509;
265 CRYPTO_add(&ret->pkeys[i].x509->references, 1,
269 if (cert->pkeys[i].privatekey != NULL)
271 ret->pkeys[i].privatekey = cert->pkeys[i].privatekey;
272 CRYPTO_add(&ret->pkeys[i].privatekey->references, 1,
273 CRYPTO_LOCK_EVP_PKEY);
277 /* ret->extra_certs *should* exist, but currently the own certificate
278 * chain is held inside SSL_CTX */
284 #if !defined(OPENSSL_NO_DH) || !defined(OPENSSL_NO_ECDH)
287 #ifndef OPENSSL_NO_RSA
288 if (ret->rsa_tmp != NULL)
289 RSA_free(ret->rsa_tmp);
291 #ifndef OPENSSL_NO_DH
292 if (ret->dh_tmp != NULL)
293 DH_free(ret->dh_tmp);
295 #ifndef OPENSSL_NO_ECDH
296 if (ret->ecdh_tmp != NULL)
297 EC_KEY_free(ret->ecdh_tmp);
300 for (i = 0; i < SSL_PKEY_NUM; i++)
302 if (ret->pkeys[i].x509 != NULL)
303 X509_free(ret->pkeys[i].x509);
304 if (ret->pkeys[i].privatekey != NULL)
305 EVP_PKEY_free(ret->pkeys[i].privatekey);
312 void ssl_cert_free(CERT *c)
319 i=CRYPTO_add(&c->references,-1,CRYPTO_LOCK_SSL_CERT);
327 fprintf(stderr,"ssl_cert_free, bad reference count\n");
332 #ifndef OPENSSL_NO_RSA
333 if (c->rsa_tmp) RSA_free(c->rsa_tmp);
335 #ifndef OPENSSL_NO_DH
336 if (c->dh_tmp) DH_free(c->dh_tmp);
338 #ifndef OPENSSL_NO_ECDH
339 if (c->ecdh_tmp) EC_KEY_free(c->ecdh_tmp);
342 for (i=0; i<SSL_PKEY_NUM; i++)
344 if (c->pkeys[i].x509 != NULL)
345 X509_free(c->pkeys[i].x509);
346 if (c->pkeys[i].privatekey != NULL)
347 EVP_PKEY_free(c->pkeys[i].privatekey);
349 if (c->pkeys[i].publickey != NULL)
350 EVP_PKEY_free(c->pkeys[i].publickey);
356 int ssl_cert_inst(CERT **o)
358 /* Create a CERT if there isn't already one
359 * (which cannot really happen, as it is initially created in
360 * SSL_CTX_new; but the earlier code usually allows for that one
361 * being non-existant, so we follow that behaviour, as it might
362 * turn out that there actually is a reason for it -- but I'm
363 * not sure that *all* of the existing code could cope with
364 * s->cert being NULL, otherwise we could do without the
365 * initialization in SSL_CTX_new).
370 SSLerr(SSL_F_SSL_CERT_INST, ERR_R_PASSED_NULL_PARAMETER);
375 if ((*o = ssl_cert_new()) == NULL)
377 SSLerr(SSL_F_SSL_CERT_INST, ERR_R_MALLOC_FAILURE);
385 SESS_CERT *ssl_sess_cert_new(void)
389 ret = OPENSSL_malloc(sizeof *ret);
392 SSLerr(SSL_F_SSL_SESS_CERT_NEW, ERR_R_MALLOC_FAILURE);
396 memset(ret, 0 ,sizeof *ret);
397 ret->peer_key = &(ret->peer_pkeys[SSL_PKEY_RSA_ENC]);
403 void ssl_sess_cert_free(SESS_CERT *sc)
410 i = CRYPTO_add(&sc->references, -1, CRYPTO_LOCK_SSL_SESS_CERT);
412 REF_PRINT("SESS_CERT", sc);
419 fprintf(stderr,"ssl_sess_cert_free, bad reference count\n");
425 if (sc->cert_chain != NULL)
426 sk_X509_pop_free(sc->cert_chain, X509_free);
427 for (i = 0; i < SSL_PKEY_NUM; i++)
429 if (sc->peer_pkeys[i].x509 != NULL)
430 X509_free(sc->peer_pkeys[i].x509);
431 #if 0 /* We don't have the peer's private key. These lines are just
432 * here as a reminder that we're still using a not-quite-appropriate
434 if (sc->peer_pkeys[i].privatekey != NULL)
435 EVP_PKEY_free(sc->peer_pkeys[i].privatekey);
439 #ifndef OPENSSL_NO_RSA
440 if (sc->peer_rsa_tmp != NULL)
441 RSA_free(sc->peer_rsa_tmp);
443 #ifndef OPENSSL_NO_DH
444 if (sc->peer_dh_tmp != NULL)
445 DH_free(sc->peer_dh_tmp);
447 #ifndef OPENSSL_NO_ECDH
448 if (sc->peer_ecdh_tmp != NULL)
449 EC_KEY_free(sc->peer_ecdh_tmp);
455 int ssl_set_peer_cert_type(SESS_CERT *sc,int type)
457 sc->peer_cert_type = type;
461 int ssl_verify_cert_chain(SSL *s,STACK_OF(X509) *sk)
467 if ((sk == NULL) || (sk_X509_num(sk) == 0))
470 x=sk_X509_value(sk,0);
471 if(!X509_STORE_CTX_init(&ctx,s->ctx->cert_store,x,sk))
473 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN,ERR_R_X509_LIB);
477 if (SSL_get_verify_depth(s) >= 0)
478 X509_STORE_CTX_set_depth(&ctx, SSL_get_verify_depth(s));
480 X509_STORE_CTX_set_ex_data(&ctx,SSL_get_ex_data_X509_STORE_CTX_idx(),s);
482 /* We need to inherit the verify parameters. These can be determined by
483 * the context: if its a server it will verify SSL client certificates
487 X509_STORE_CTX_set_default(&ctx,
488 s->server ? "ssl_client" : "ssl_server");
489 /* Anything non-default in "param" should overwrite anything in the
492 X509_VERIFY_PARAM_set1(X509_STORE_CTX_get0_param(&ctx), s->param);
494 if (s->verify_callback)
495 X509_STORE_CTX_set_verify_cb(&ctx, s->verify_callback);
497 if (s->ctx->app_verify_callback != NULL)
498 #if 1 /* new with OpenSSL 0.9.7 */
499 i=s->ctx->app_verify_callback(&ctx, s->ctx->app_verify_arg);
501 i=s->ctx->app_verify_callback(&ctx); /* should pass app_verify_arg */
505 #ifndef OPENSSL_NO_X509_VERIFY
506 i=X509_verify_cert(&ctx);
509 ctx.error=X509_V_ERR_APPLICATION_VERIFICATION;
510 SSLerr(SSL_F_SSL_VERIFY_CERT_CHAIN,SSL_R_NO_VERIFY_CALLBACK);
514 s->verify_result=ctx.error;
515 X509_STORE_CTX_cleanup(&ctx);
520 static void set_client_CA_list(STACK_OF(X509_NAME) **ca_list,STACK_OF(X509_NAME) *name_list)
522 if (*ca_list != NULL)
523 sk_X509_NAME_pop_free(*ca_list,X509_NAME_free);
528 STACK_OF(X509_NAME) *SSL_dup_CA_list(STACK_OF(X509_NAME) *sk)
531 STACK_OF(X509_NAME) *ret;
534 ret=sk_X509_NAME_new_null();
535 for (i=0; i<sk_X509_NAME_num(sk); i++)
537 name=X509_NAME_dup(sk_X509_NAME_value(sk,i));
538 if ((name == NULL) || !sk_X509_NAME_push(ret,name))
540 sk_X509_NAME_pop_free(ret,X509_NAME_free);
547 void SSL_set_client_CA_list(SSL *s,STACK_OF(X509_NAME) *name_list)
549 set_client_CA_list(&(s->client_CA),name_list);
552 void SSL_CTX_set_client_CA_list(SSL_CTX *ctx,STACK_OF(X509_NAME) *name_list)
554 set_client_CA_list(&(ctx->client_CA),name_list);
557 STACK_OF(X509_NAME) *SSL_CTX_get_client_CA_list(const SSL_CTX *ctx)
559 return(ctx->client_CA);
562 STACK_OF(X509_NAME) *SSL_get_client_CA_list(const SSL *s)
564 if (s->type == SSL_ST_CONNECT)
565 { /* we are in the client */
566 if (((s->version>>8) == SSL3_VERSION_MAJOR) &&
568 return(s->s3->tmp.ca_names);
574 if (s->client_CA != NULL)
575 return(s->client_CA);
577 return(s->ctx->client_CA);
581 static int add_client_CA(STACK_OF(X509_NAME) **sk,X509 *x)
585 if (x == NULL) return(0);
586 if ((*sk == NULL) && ((*sk=sk_X509_NAME_new_null()) == NULL))
589 if ((name=X509_NAME_dup(X509_get_subject_name(x))) == NULL)
592 if (!sk_X509_NAME_push(*sk,name))
594 X509_NAME_free(name);
600 int SSL_add_client_CA(SSL *ssl,X509 *x)
602 return(add_client_CA(&(ssl->client_CA),x));
605 int SSL_CTX_add_client_CA(SSL_CTX *ctx,X509 *x)
607 return(add_client_CA(&(ctx->client_CA),x));
610 static int xname_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
612 return(X509_NAME_cmp(*a,*b));
615 #ifndef OPENSSL_NO_STDIO
617 * Load CA certs from a file into a ::STACK. Note that it is somewhat misnamed;
618 * it doesn't really have anything to do with clients (except that a common use
619 * for a stack of CAs is to send it to the client). Actually, it doesn't have
620 * much to do with CAs, either, since it will load any old cert.
621 * \param file the file containing one or more certs.
622 * \return a ::STACK containing the certs.
624 STACK_OF(X509_NAME) *SSL_load_client_CA_file(const char *file)
629 STACK_OF(X509_NAME) *ret = NULL,*sk;
631 sk=sk_X509_NAME_new(xname_cmp);
633 in=BIO_new(BIO_s_file_internal());
635 if ((sk == NULL) || (in == NULL))
637 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE,ERR_R_MALLOC_FAILURE);
641 if (!BIO_read_filename(in,file))
646 if (PEM_read_bio_X509(in,&x,NULL,NULL) == NULL)
650 ret = sk_X509_NAME_new_null();
653 SSLerr(SSL_F_SSL_LOAD_CLIENT_CA_FILE,ERR_R_MALLOC_FAILURE);
657 if ((xn=X509_get_subject_name(x)) == NULL) goto err;
658 /* check for duplicates */
659 xn=X509_NAME_dup(xn);
660 if (xn == NULL) goto err;
661 if (sk_X509_NAME_find(sk,xn) >= 0)
665 sk_X509_NAME_push(sk,xn);
666 sk_X509_NAME_push(ret,xn);
673 if (ret != NULL) sk_X509_NAME_pop_free(ret,X509_NAME_free);
676 if (sk != NULL) sk_X509_NAME_free(sk);
677 if (in != NULL) BIO_free(in);
678 if (x != NULL) X509_free(x);
686 * Add a file of certs to a stack.
687 * \param stack the stack to add to.
688 * \param file the file to add from. All certs in this file that are not
689 * already in the stack will be added.
690 * \return 1 for success, 0 for failure. Note that in the case of failure some
691 * certs may have been added to \c stack.
694 int SSL_add_file_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
701 int (*oldcmp)(const X509_NAME * const *a, const X509_NAME * const *b);
703 oldcmp=sk_X509_NAME_set_cmp_func(stack,xname_cmp);
705 in=BIO_new(BIO_s_file_internal());
709 SSLerr(SSL_F_SSL_ADD_FILE_CERT_SUBJECTS_TO_STACK,ERR_R_MALLOC_FAILURE);
713 if (!BIO_read_filename(in,file))
718 if (PEM_read_bio_X509(in,&x,NULL,NULL) == NULL)
720 if ((xn=X509_get_subject_name(x)) == NULL) goto err;
721 xn=X509_NAME_dup(xn);
722 if (xn == NULL) goto err;
723 if (sk_X509_NAME_find(stack,xn) >= 0)
726 sk_X509_NAME_push(stack,xn);
741 (void)sk_X509_NAME_set_cmp_func(stack,oldcmp);
747 * Add a directory of certs to a stack.
748 * \param stack the stack to append to.
749 * \param dir the directory to append from. All files in this directory will be
750 * examined as potential certs. Any that are acceptable to
751 * SSL_add_dir_cert_subjects_to_stack() that are not already in the stack will be
753 * \return 1 for success, 0 for failure. Note that in the case of failure some
754 * certs may have been added to \c stack.
757 int SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
760 OPENSSL_DIR_CTX *d = NULL;
761 const char *filename;
764 CRYPTO_w_lock(CRYPTO_LOCK_READDIR);
766 /* Note that a side effect is that the CAs will be sorted by name */
768 while((filename = OPENSSL_DIR_read(&d, dir)))
773 if(strlen(dir)+strlen(filename)+2 > sizeof buf)
775 SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK,SSL_R_PATH_TOO_LONG);
779 #ifdef OPENSSL_SYS_VMS
780 r = BIO_snprintf(buf,sizeof buf,"%s%s",dir,filename);
782 r = BIO_snprintf(buf,sizeof buf,"%s/%s",dir,filename);
784 if (r <= 0 || r >= (int)sizeof(buf))
786 if(!SSL_add_file_cert_subjects_to_stack(stack,buf))
792 SYSerr(SYS_F_OPENDIR, get_last_sys_error());
793 ERR_add_error_data(3, "OPENSSL_DIR_read(&ctx, '", dir, "')");
794 SSLerr(SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK, ERR_R_SYS_LIB);
801 if (d) OPENSSL_DIR_end(&d);
802 CRYPTO_w_unlock(CRYPTO_LOCK_READDIR);