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DEFINITIONS
This source file includes following definitions.
- gss_mech_free
- make_auth_domain_name
- gss_mech_svc_setup
- gss_mech_register
- gss_mech_unregister
- gss_mech_get
- gss_mech_get_by_name
- mech_supports_pseudoflavor
- gss_mech_get_by_pseudoflavor
- gss_svc_to_pseudoflavor
- gss_pseudoflavor_to_service
- gss_service_to_auth_domain_name
- gss_mech_put
- gss_import_sec_context
- gss_get_mic
- gss_verify_mic
- gss_wrap
- gss_unwrap
- gss_delete_sec_context
/*
* 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(®istered_mechs_lock);
list_add(&gm->gm_list, ®istered_mechs);
spin_unlock(®istered_mechs_lock);
dprintk("RPC: registered gss mechanism %s\n", gm->gm_name);
return 0;
}
EXPORT_SYMBOL(gss_mech_register);
void
gss_mech_unregister(struct gss_api_mech *gm)
{
spin_lock(®istered_mechs_lock);
list_del(&gm->gm_list);
spin_unlock(®istered_mechs_lock);
dprintk("RPC: unregistered gss mechanism %s\n", gm->gm_name);
gss_mech_free(gm);
}
EXPORT_SYMBOL(gss_mech_unregister);
struct gss_api_mech *
gss_mech_get(struct gss_api_mech *gm)
{
__module_get(gm->gm_owner);
return gm;
}
EXPORT_SYMBOL(gss_mech_get);
struct gss_api_mech *
gss_mech_get_by_name(const char *name)
{
struct gss_api_mech *pos, *gm = NULL;
spin_lock(®istered_mechs_lock);
list_for_each_entry(pos, ®istered_mechs, gm_list) {
if (0 == strcmp(name, pos->gm_name)) {
if (try_module_get(pos->gm_owner))
gm = pos;
break;
}
}
spin_unlock(®istered_mechs_lock);
return gm;
}
EXPORT_SYMBOL(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(®istered_mechs_lock);
list_for_each_entry(pos, ®istered_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(®istered_mechs_lock);
return gm;
}
EXPORT_SYMBOL(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(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(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(gss_service_to_auth_domain_name);
void
gss_mech_put(struct gss_api_mech * gm)
{
if (gm)
module_put(gm->gm_owner);
}
EXPORT_SYMBOL(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)
{
if (!(*ctx_id = kzalloc(sizeof(**ctx_id), GFP_KERNEL)))
return GSS_S_FAILURE;
(*ctx_id)->mech_type = gss_mech_get(mech);
return mech->gm_ops
->gss_import_sec_context(input_token, bufsize, *ctx_id);
}
/* 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);
}
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;
}