[linux-2.6-block.git] / net / sunrpc / auth_gss / gss_mech_switch.c

/*
 *  linux/net/sunrpc/gss_mech_switch.c
 *
 *  Copyright (c) 2001 The Regents of the University of Michigan.
 *  All rights reserved.
 *
 *  J. Bruce Fields   <bfields@umich.edu>
 *
 *  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. Neither the name of the University nor the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 *  THIS SOFTWARE IS PROVIDED ``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 REGENTS 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.
 *
 */

#include <linux/types.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/sunrpc/msg_prot.h>
#include <linux/sunrpc/gss_asn1.h>
#include <linux/sunrpc/auth_gss.h>
#include <linux/sunrpc/svcauth_gss.h>
#include <linux/sunrpc/gss_err.h>
#include <linux/sunrpc/sched.h>
#include <linux/sunrpc/gss_api.h>
#include <linux/sunrpc/clnt.h>

#ifdef RPC_DEBUG
# define RPCDBG_FACILITY        RPCDBG_AUTH
#endif

static LIST_HEAD(registered_mechs);
static DEFINE_SPINLOCK(registered_mechs_lock);

static void
gss_mech_free(struct gss_api_mech *gm)
{
	struct pf_desc *pf;
	int i;

	for (i = 0; i < gm->gm_pf_num; i++) {
		pf = &gm->gm_pfs[i];
		kfree(pf->auth_domain_name);
		pf->auth_domain_name = NULL;
	}
}

static inline char *
make_auth_domain_name(char *name)
{
	static char	*prefix = "gss/";
	char		*new;

	new = kmalloc(strlen(name) + strlen(prefix) + 1, GFP_KERNEL);
	if (new) {
		strcpy(new, prefix);
		strcat(new, name);
	}
	return new;
}

static int
gss_mech_svc_setup(struct gss_api_mech *gm)
{
	struct pf_desc *pf;
	int i, status;

	for (i = 0; i < gm->gm_pf_num; i++) {
		pf = &gm->gm_pfs[i];
		pf->auth_domain_name = make_auth_domain_name(pf->name);
		status = -ENOMEM;
		if (pf->auth_domain_name == NULL)
			goto out;
		status = svcauth_gss_register_pseudoflavor(pf->pseudoflavor,
							pf->auth_domain_name);
		if (status)
			goto out;
	}
	return 0;
out:
	gss_mech_free(gm);
	return status;
}

int
gss_mech_register(struct gss_api_mech *gm)
{
	int status;

	status = gss_mech_svc_setup(gm);
	if (status)
		return status;
	spin_lock(&registered_mechs_lock);
	list_add(&gm->gm_list, &registered_mechs);
	spin_unlock(&registered_mechs_lock);
	dprintk("RPC:       registered gss mechanism %s\n", gm->gm_name);
	return 0;
}

EXPORT_SYMBOL_GPL(gss_mech_register);

void
gss_mech_unregister(struct gss_api_mech *gm)
{
	spin_lock(&registered_mechs_lock);
	list_del(&gm->gm_list);
	spin_unlock(&registered_mechs_lock);
	dprintk("RPC:       unregistered gss mechanism %s\n", gm->gm_name);
	gss_mech_free(gm);
}

EXPORT_SYMBOL_GPL(gss_mech_unregister);

struct gss_api_mech *
gss_mech_get(struct gss_api_mech *gm)
{
	__module_get(gm->gm_owner);
	return gm;
}

EXPORT_SYMBOL_GPL(gss_mech_get);

struct gss_api_mech *
gss_mech_get_by_name(const char *name)
{
	struct gss_api_mech	*pos, *gm = NULL;

	spin_lock(&registered_mechs_lock);
	list_for_each_entry(pos, &registered_mechs, gm_list) {
		if (0 == strcmp(name, pos->gm_name)) {
			if (try_module_get(pos->gm_owner))
				gm = pos;
			break;
		}
	}
	spin_unlock(&registered_mechs_lock);
	return gm;

}

EXPORT_SYMBOL_GPL(gss_mech_get_by_name);

static inline int
mech_supports_pseudoflavor(struct gss_api_mech *gm, u32 pseudoflavor)
{
	int i;

	for (i = 0; i < gm->gm_pf_num; i++) {
		if (gm->gm_pfs[i].pseudoflavor == pseudoflavor)
			return 1;
	}
	return 0;
}

struct gss_api_mech *
gss_mech_get_by_pseudoflavor(u32 pseudoflavor)
{
	struct gss_api_mech *pos, *gm = NULL;

	spin_lock(&registered_mechs_lock);
	list_for_each_entry(pos, &registered_mechs, gm_list) {
		if (!mech_supports_pseudoflavor(pos, pseudoflavor)) {
			module_put(pos->gm_owner);
			continue;
		}
		if (try_module_get(pos->gm_owner))
			gm = pos;
		break;
	}
	spin_unlock(&registered_mechs_lock);
	return gm;
}

EXPORT_SYMBOL_GPL(gss_mech_get_by_pseudoflavor);

u32
gss_svc_to_pseudoflavor(struct gss_api_mech *gm, u32 service)
{
	int i;

	for (i = 0; i < gm->gm_pf_num; i++) {
		if (gm->gm_pfs[i].service == service) {
			return gm->gm_pfs[i].pseudoflavor;
		}
	}
	return RPC_AUTH_MAXFLAVOR; /* illegal value */
}
EXPORT_SYMBOL_GPL(gss_svc_to_pseudoflavor);

u32
gss_pseudoflavor_to_service(struct gss_api_mech *gm, u32 pseudoflavor)
{
	int i;

	for (i = 0; i < gm->gm_pf_num; i++) {
		if (gm->gm_pfs[i].pseudoflavor == pseudoflavor)
			return gm->gm_pfs[i].service;
	}
	return 0;
}

EXPORT_SYMBOL_GPL(gss_pseudoflavor_to_service);

char *
gss_service_to_auth_domain_name(struct gss_api_mech *gm, u32 service)
{
	int i;

	for (i = 0; i < gm->gm_pf_num; i++) {
		if (gm->gm_pfs[i].service == service)
			return gm->gm_pfs[i].auth_domain_name;
	}
	return NULL;
}

EXPORT_SYMBOL_GPL(gss_service_to_auth_domain_name);

void
gss_mech_put(struct gss_api_mech * gm)
{
	if (gm)
		module_put(gm->gm_owner);
}

EXPORT_SYMBOL_GPL(gss_mech_put);

/* The mech could probably be determined from the token instead, but it's just
 * as easy for now to pass it in. */
int
gss_import_sec_context(const void *input_token, size_t bufsize,
		       struct gss_api_mech	*mech,
		       struct gss_ctx		**ctx_id,
		       gfp_t gfp_mask)
{
	if (!(*ctx_id = kzalloc(sizeof(**ctx_id), gfp_mask)))
		return -ENOMEM;
	(*ctx_id)->mech_type = gss_mech_get(mech);

	return mech->gm_ops
		->gss_import_sec_context(input_token, bufsize, *ctx_id, gfp_mask);
}

/* gss_get_mic: compute a mic over message and return mic_token. */

u32
gss_get_mic(struct gss_ctx	*context_handle,
	    struct xdr_buf	*message,
	    struct xdr_netobj	*mic_token)
{
	 return context_handle->mech_type->gm_ops
		->gss_get_mic(context_handle,
			      message,
			      mic_token);
}

/* gss_verify_mic: check whether the provided mic_token verifies message. */

u32
gss_verify_mic(struct gss_ctx		*context_handle,
	       struct xdr_buf		*message,
	       struct xdr_netobj	*mic_token)
{
	return context_handle->mech_type->gm_ops
		->gss_verify_mic(context_handle,
				 message,
				 mic_token);
}

/*
 * This function is called from both the client and server code.
 * Each makes guarantees about how much "slack" space is available
 * for the underlying function in "buf"'s head and tail while
 * performing the wrap.
 *
 * The client and server code allocate RPC_MAX_AUTH_SIZE extra
 * space in both the head and tail which is available for use by
 * the wrap function.
 *
 * Underlying functions should verify they do not use more than
 * RPC_MAX_AUTH_SIZE of extra space in either the head or tail
 * when performing the wrap.
 */
u32
gss_wrap(struct gss_ctx	*ctx_id,
	 int		offset,
	 struct xdr_buf	*buf,
	 struct page	**inpages)
{
	return ctx_id->mech_type->gm_ops
		->gss_wrap(ctx_id, offset, buf, inpages);
}

u32
gss_unwrap(struct gss_ctx	*ctx_id,
	   int			offset,
	   struct xdr_buf	*buf)
{
	return ctx_id->mech_type->gm_ops
		->gss_unwrap(ctx_id, offset, buf);
}


/* gss_delete_sec_context: free all resources associated with context_handle.
 * Note this differs from the RFC 2744-specified prototype in that we don't
 * bother returning an output token, since it would never be used anyway. */

u32
gss_delete_sec_context(struct gss_ctx	**context_handle)
{
	dprintk("RPC:       gss_delete_sec_context deleting %p\n",
			*context_handle);

	if (!*context_handle)
		return(GSS_S_NO_CONTEXT);
	if ((*context_handle)->internal_ctx_id)
		(*context_handle)->mech_type->gm_ops
			->gss_delete_sec_context((*context_handle)
							->internal_ctx_id);
	gss_mech_put((*context_handle)->mech_type);
	kfree(*context_handle);
	*context_handle=NULL;
	return GSS_S_COMPLETE;
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* linux/net/sunrpc/gss_mech_switch.c
	3	*
	4	* Copyright (c) 2001 The Regents of the University of Michigan.
	5	* All rights reserved.
	6	*
	7	* J. Bruce Fields <bfields@umich.edu>
	8	*
cca5172a	9	* Redistribution and use in source and binary forms, with or without
1da177e4 LT	10	* modification, are permitted provided that the following conditions
	11	* are met:
	12	*
	13	* 1. Redistributions of source code must retain the above copyright
	14	* notice, this list of conditions and the following disclaimer.
	15	* 2. Redistributions in binary form must reproduce the above copyright
cca5172a	16	* notice, this list of conditions and the following disclaimer in the
1da177e4 LT	17	* documentation and/or other materials provided with the distribution.
	18	* 3. Neither the name of the University nor the names of its
	19	* contributors may be used to endorse or promote products derived
	20	* from this software without specific prior written permission.
	21	*
	22	* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
	23	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
	24	* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
	25	* DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	26	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
	27	* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
	28	* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
	29	* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
	30	* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
	31	* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
	32	* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	33	*
	34	*/
	35
	36	#include <linux/types.h>
	37	#include <linux/slab.h>
1da177e4 LT	38	#include <linux/module.h>
	39	#include <linux/sunrpc/msg_prot.h>
	40	#include <linux/sunrpc/gss_asn1.h>
	41	#include <linux/sunrpc/auth_gss.h>
	42	#include <linux/sunrpc/svcauth_gss.h>
	43	#include <linux/sunrpc/gss_err.h>
	44	#include <linux/sunrpc/sched.h>
	45	#include <linux/sunrpc/gss_api.h>
	46	#include <linux/sunrpc/clnt.h>
	47
	48	#ifdef RPC_DEBUG
	49	# define RPCDBG_FACILITY RPCDBG_AUTH
	50	#endif
	51
	52	static LIST_HEAD(registered_mechs);
	53	static DEFINE_SPINLOCK(registered_mechs_lock);
	54
	55	static void
	56	gss_mech_free(struct gss_api_mech *gm)
	57	{
	58	struct pf_desc *pf;
	59	int i;
	60
	61	for (i = 0; i < gm->gm_pf_num; i++) {
	62	pf = &gm->gm_pfs[i];
a51482bd	63	kfree(pf->auth_domain_name);
1da177e4 LT	64	pf->auth_domain_name = NULL;
	65	}
	66	}
	67
	68	static inline char *
	69	make_auth_domain_name(char *name)
	70	{
	71	static char *prefix = "gss/";
	72	char *new;
	73
	74	new = kmalloc(strlen(name) + strlen(prefix) + 1, GFP_KERNEL);
	75	if (new) {
	76	strcpy(new, prefix);
	77	strcat(new, name);
	78	}
	79	return new;
	80	}
	81
	82	static int
	83	gss_mech_svc_setup(struct gss_api_mech *gm)
	84	{
	85	struct pf_desc *pf;
	86	int i, status;
	87
	88	for (i = 0; i < gm->gm_pf_num; i++) {
	89	pf = &gm->gm_pfs[i];
	90	pf->auth_domain_name = make_auth_domain_name(pf->name);
	91	status = -ENOMEM;
	92	if (pf->auth_domain_name == NULL)
	93	goto out;
	94	status = svcauth_gss_register_pseudoflavor(pf->pseudoflavor,
	95	pf->auth_domain_name);
	96	if (status)
	97	goto out;
	98	}
	99	return 0;
	100	out:
	101	gss_mech_free(gm);
	102	return status;
	103	}
	104
	105	int
	106	gss_mech_register(struct gss_api_mech *gm)
	107	{
	108	int status;
	109
	110	status = gss_mech_svc_setup(gm);
	111	if (status)
	112	return status;
	113	spin_lock(&registered_mechs_lock);
	114	list_add(&gm->gm_list, &registered_mechs);
	115	spin_unlock(&registered_mechs_lock);
8885cb36	116	dprintk("RPC: registered gss mechanism %s\n", gm->gm_name);
1da177e4 LT	117	return 0;
	118	}
	119
7bd88269	120	EXPORT_SYMBOL_GPL(gss_mech_register);
1da177e4 LT	121
	122	void
	123	gss_mech_unregister(struct gss_api_mech *gm)
	124	{
	125	spin_lock(&registered_mechs_lock);
	126	list_del(&gm->gm_list);
	127	spin_unlock(&registered_mechs_lock);
8885cb36	128	dprintk("RPC: unregistered gss mechanism %s\n", gm->gm_name);
1da177e4 LT	129	gss_mech_free(gm);
	130	}
	131
7bd88269	132	EXPORT_SYMBOL_GPL(gss_mech_unregister);
1da177e4 LT	133
	134	struct gss_api_mech *
	135	gss_mech_get(struct gss_api_mech *gm)
	136	{
	137	__module_get(gm->gm_owner);
	138	return gm;
	139	}
	140
7bd88269	141	EXPORT_SYMBOL_GPL(gss_mech_get);
1da177e4 LT	142
	143	struct gss_api_mech *
	144	gss_mech_get_by_name(const char *name)
	145	{
	146	struct gss_api_mech pos, gm = NULL;
	147
	148	spin_lock(&registered_mechs_lock);
	149	list_for_each_entry(pos, &registered_mechs, gm_list) {
	150	if (0 == strcmp(name, pos->gm_name)) {
	151	if (try_module_get(pos->gm_owner))
	152	gm = pos;
	153	break;
	154	}
	155	}
	156	spin_unlock(&registered_mechs_lock);
	157	return gm;
	158
	159	}
	160
7bd88269	161	EXPORT_SYMBOL_GPL(gss_mech_get_by_name);
1da177e4 LT	162
	163	static inline int
	164	mech_supports_pseudoflavor(struct gss_api_mech *gm, u32 pseudoflavor)
	165	{
	166	int i;
	167
	168	for (i = 0; i < gm->gm_pf_num; i++) {
	169	if (gm->gm_pfs[i].pseudoflavor == pseudoflavor)
	170	return 1;
	171	}
	172	return 0;
	173	}
	174
	175	struct gss_api_mech *
	176	gss_mech_get_by_pseudoflavor(u32 pseudoflavor)
	177	{
	178	struct gss_api_mech pos, gm = NULL;
	179
	180	spin_lock(&registered_mechs_lock);
	181	list_for_each_entry(pos, &registered_mechs, gm_list) {
	182	if (!mech_supports_pseudoflavor(pos, pseudoflavor)) {
	183	module_put(pos->gm_owner);
	184	continue;
	185	}
	186	if (try_module_get(pos->gm_owner))
	187	gm = pos;
	188	break;
	189	}
	190	spin_unlock(&registered_mechs_lock);
	191	return gm;
	192	}
	193
7bd88269	194	EXPORT_SYMBOL_GPL(gss_mech_get_by_pseudoflavor);
1da177e4	195
c4170583 AA	196	u32
	197	gss_svc_to_pseudoflavor(struct gss_api_mech *gm, u32 service)
	198	{
	199	int i;
	200
	201	for (i = 0; i < gm->gm_pf_num; i++) {
	202	if (gm->gm_pfs[i].service == service) {
	203	return gm->gm_pfs[i].pseudoflavor;
	204	}
	205	}
	206	return RPC_AUTH_MAXFLAVOR; /* illegal value */
	207	}
7bd88269	208	EXPORT_SYMBOL_GPL(gss_svc_to_pseudoflavor);
c4170583	209
1da177e4 LT	210	u32
	211	gss_pseudoflavor_to_service(struct gss_api_mech *gm, u32 pseudoflavor)
	212	{
	213	int i;
	214
	215	for (i = 0; i < gm->gm_pf_num; i++) {
	216	if (gm->gm_pfs[i].pseudoflavor == pseudoflavor)
	217	return gm->gm_pfs[i].service;
	218	}
	219	return 0;
	220	}
	221
7bd88269	222	EXPORT_SYMBOL_GPL(gss_pseudoflavor_to_service);
1da177e4 LT	223
	224	char *
	225	gss_service_to_auth_domain_name(struct gss_api_mech *gm, u32 service)
	226	{
	227	int i;
	228
	229	for (i = 0; i < gm->gm_pf_num; i++) {
	230	if (gm->gm_pfs[i].service == service)
	231	return gm->gm_pfs[i].auth_domain_name;
	232	}
	233	return NULL;
	234	}
	235
7bd88269	236	EXPORT_SYMBOL_GPL(gss_service_to_auth_domain_name);
1da177e4 LT	237
	238	void
	239	gss_mech_put(struct gss_api_mech * gm)
	240	{
1df0cada BF	241	if (gm)
1df0cada BF	242	module_put(gm->gm_owner);
1da177e4 LT	243	}
1da177e4 LT	244
7bd88269	245	EXPORT_SYMBOL_GPL(gss_mech_put);
1da177e4 LT	246
	247	/* The mech could probably be determined from the token instead, but it's just
	248	* as easy for now to pass it in. */
	249	int
	250	gss_import_sec_context(const void *input_token, size_t bufsize,
	251	struct gss_api_mech *mech,
1f4c86c0 TM	252	struct gss_ctx **ctx_id,
1f4c86c0 TM	253	gfp_t gfp_mask)
1da177e4	254	{
1f4c86c0	255	if (!(ctx_id = kzalloc(sizeof(*ctx_id), gfp_mask)))
b891e4a0	256	return -ENOMEM;
1da177e4 LT	257	(*ctx_id)->mech_type = gss_mech_get(mech);
	258
	259	return mech->gm_ops
1f4c86c0	260	->gss_import_sec_context(input_token, bufsize, *ctx_id, gfp_mask);
1da177e4 LT	261	}
	262
	263	/* gss_get_mic: compute a mic over message and return mic_token. */
	264
	265	u32
	266	gss_get_mic(struct gss_ctx *context_handle,
1da177e4 LT	267	struct xdr_buf *message,
	268	struct xdr_netobj *mic_token)
	269	{
	270	return context_handle->mech_type->gm_ops
	271	->gss_get_mic(context_handle,
1da177e4 LT	272	message,
	273	mic_token);
	274	}
	275
	276	/* gss_verify_mic: check whether the provided mic_token verifies message. */
	277
	278	u32
	279	gss_verify_mic(struct gss_ctx *context_handle,
	280	struct xdr_buf *message,
00fd6e14	281	struct xdr_netobj *mic_token)
1da177e4 LT	282	{
	283	return context_handle->mech_type->gm_ops
	284	->gss_verify_mic(context_handle,
	285	message,
00fd6e14	286	mic_token);
1da177e4 LT	287	}
1da177e4 LT	288
7561042f KC	289	/*
	290	* This function is called from both the client and server code.
	291	* Each makes guarantees about how much "slack" space is available
	292	* for the underlying function in "buf"'s head and tail while
	293	* performing the wrap.
	294	*
	295	* The client and server code allocate RPC_MAX_AUTH_SIZE extra
	296	* space in both the head and tail which is available for use by
	297	* the wrap function.
	298	*
	299	* Underlying functions should verify they do not use more than
	300	* RPC_MAX_AUTH_SIZE of extra space in either the head or tail
	301	* when performing the wrap.
	302	*/
293f1eb5 BF	303	u32
293f1eb5 BF	304	gss_wrap(struct gss_ctx *ctx_id,
293f1eb5 BF	305	int offset,
	306	struct xdr_buf *buf,
	307	struct page **inpages)
	308	{
	309	return ctx_id->mech_type->gm_ops
00fd6e14	310	->gss_wrap(ctx_id, offset, buf, inpages);
293f1eb5 BF	311	}
	312
	313	u32
	314	gss_unwrap(struct gss_ctx *ctx_id,
293f1eb5 BF	315	int offset,
	316	struct xdr_buf *buf)
	317	{
	318	return ctx_id->mech_type->gm_ops
00fd6e14	319	->gss_unwrap(ctx_id, offset, buf);
293f1eb5 BF	320	}
	321
	322
1da177e4 LT	323	/* gss_delete_sec_context: free all resources associated with context_handle.
	324	* Note this differs from the RFC 2744-specified prototype in that we don't
	325	* bother returning an output token, since it would never be used anyway. */
	326
	327	u32
	328	gss_delete_sec_context(struct gss_ctx **context_handle)
	329	{
8885cb36	330	dprintk("RPC: gss_delete_sec_context deleting %p\n",
1da177e4 LT	331	*context_handle);
	332
	333	if (!*context_handle)
	334	return(GSS_S_NO_CONTEXT);
27724426	335	if ((*context_handle)->internal_ctx_id)
1da177e4 LT	336	(*context_handle)->mech_type->gm_ops
	337	->gss_delete_sec_context((*context_handle)
	338	->internal_ctx_id);
1df0cada	339	gss_mech_put((*context_handle)->mech_type);
1da177e4 LT	340	kfree(*context_handle);
	341	*context_handle=NULL;
	342	return GSS_S_COMPLETE;
	343	}