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00fd6e1425
Not only are the qop parameters that are passed around throughout the gssapi unused by any currently implemented mechanism, but there appears to be some doubt as to whether they will ever be used. Let's just kill them off for now. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
316 lines
7.6 KiB
C
316 lines
7.6 KiB
C
/*
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* linux/net/sunrpc/gss_mech_switch.c
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*
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* Copyright (c) 2001 The Regents of the University of Michigan.
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* All rights reserved.
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*
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* J. Bruce Fields <bfields@umich.edu>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#include <linux/types.h>
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#include <linux/slab.h>
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#include <linux/module.h>
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#include <linux/sunrpc/msg_prot.h>
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#include <linux/sunrpc/gss_asn1.h>
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#include <linux/sunrpc/auth_gss.h>
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#include <linux/sunrpc/svcauth_gss.h>
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#include <linux/sunrpc/gss_err.h>
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#include <linux/sunrpc/sched.h>
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#include <linux/sunrpc/gss_api.h>
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#include <linux/sunrpc/clnt.h>
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#ifdef RPC_DEBUG
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# define RPCDBG_FACILITY RPCDBG_AUTH
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#endif
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static LIST_HEAD(registered_mechs);
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static DEFINE_SPINLOCK(registered_mechs_lock);
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static void
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gss_mech_free(struct gss_api_mech *gm)
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{
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struct pf_desc *pf;
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int i;
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for (i = 0; i < gm->gm_pf_num; i++) {
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pf = &gm->gm_pfs[i];
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if (pf->auth_domain_name)
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kfree(pf->auth_domain_name);
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pf->auth_domain_name = NULL;
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}
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}
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static inline char *
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make_auth_domain_name(char *name)
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{
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static char *prefix = "gss/";
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char *new;
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new = kmalloc(strlen(name) + strlen(prefix) + 1, GFP_KERNEL);
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if (new) {
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strcpy(new, prefix);
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strcat(new, name);
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}
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return new;
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}
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static int
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gss_mech_svc_setup(struct gss_api_mech *gm)
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{
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struct pf_desc *pf;
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int i, status;
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for (i = 0; i < gm->gm_pf_num; i++) {
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pf = &gm->gm_pfs[i];
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pf->auth_domain_name = make_auth_domain_name(pf->name);
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status = -ENOMEM;
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if (pf->auth_domain_name == NULL)
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goto out;
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status = svcauth_gss_register_pseudoflavor(pf->pseudoflavor,
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pf->auth_domain_name);
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if (status)
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goto out;
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}
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return 0;
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out:
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gss_mech_free(gm);
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return status;
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}
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int
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gss_mech_register(struct gss_api_mech *gm)
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{
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int status;
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status = gss_mech_svc_setup(gm);
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if (status)
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return status;
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spin_lock(®istered_mechs_lock);
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list_add(&gm->gm_list, ®istered_mechs);
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spin_unlock(®istered_mechs_lock);
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dprintk("RPC: registered gss mechanism %s\n", gm->gm_name);
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return 0;
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}
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EXPORT_SYMBOL(gss_mech_register);
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void
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gss_mech_unregister(struct gss_api_mech *gm)
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{
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spin_lock(®istered_mechs_lock);
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list_del(&gm->gm_list);
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spin_unlock(®istered_mechs_lock);
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dprintk("RPC: unregistered gss mechanism %s\n", gm->gm_name);
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gss_mech_free(gm);
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}
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EXPORT_SYMBOL(gss_mech_unregister);
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struct gss_api_mech *
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gss_mech_get(struct gss_api_mech *gm)
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{
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__module_get(gm->gm_owner);
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return gm;
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}
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EXPORT_SYMBOL(gss_mech_get);
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struct gss_api_mech *
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gss_mech_get_by_name(const char *name)
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{
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struct gss_api_mech *pos, *gm = NULL;
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spin_lock(®istered_mechs_lock);
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list_for_each_entry(pos, ®istered_mechs, gm_list) {
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if (0 == strcmp(name, pos->gm_name)) {
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if (try_module_get(pos->gm_owner))
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gm = pos;
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break;
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}
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}
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spin_unlock(®istered_mechs_lock);
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return gm;
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}
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EXPORT_SYMBOL(gss_mech_get_by_name);
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static inline int
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mech_supports_pseudoflavor(struct gss_api_mech *gm, u32 pseudoflavor)
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{
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int i;
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for (i = 0; i < gm->gm_pf_num; i++) {
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if (gm->gm_pfs[i].pseudoflavor == pseudoflavor)
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return 1;
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}
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return 0;
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}
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struct gss_api_mech *
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gss_mech_get_by_pseudoflavor(u32 pseudoflavor)
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{
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struct gss_api_mech *pos, *gm = NULL;
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spin_lock(®istered_mechs_lock);
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list_for_each_entry(pos, ®istered_mechs, gm_list) {
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if (!mech_supports_pseudoflavor(pos, pseudoflavor)) {
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module_put(pos->gm_owner);
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continue;
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}
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if (try_module_get(pos->gm_owner))
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gm = pos;
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break;
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}
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spin_unlock(®istered_mechs_lock);
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return gm;
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}
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EXPORT_SYMBOL(gss_mech_get_by_pseudoflavor);
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u32
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gss_pseudoflavor_to_service(struct gss_api_mech *gm, u32 pseudoflavor)
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{
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int i;
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for (i = 0; i < gm->gm_pf_num; i++) {
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if (gm->gm_pfs[i].pseudoflavor == pseudoflavor)
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return gm->gm_pfs[i].service;
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}
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return 0;
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}
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EXPORT_SYMBOL(gss_pseudoflavor_to_service);
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char *
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gss_service_to_auth_domain_name(struct gss_api_mech *gm, u32 service)
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{
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int i;
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for (i = 0; i < gm->gm_pf_num; i++) {
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if (gm->gm_pfs[i].service == service)
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return gm->gm_pfs[i].auth_domain_name;
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}
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return NULL;
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}
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EXPORT_SYMBOL(gss_service_to_auth_domain_name);
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void
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gss_mech_put(struct gss_api_mech * gm)
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{
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module_put(gm->gm_owner);
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}
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EXPORT_SYMBOL(gss_mech_put);
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/* The mech could probably be determined from the token instead, but it's just
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* as easy for now to pass it in. */
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int
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gss_import_sec_context(const void *input_token, size_t bufsize,
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struct gss_api_mech *mech,
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struct gss_ctx **ctx_id)
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{
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if (!(*ctx_id = kmalloc(sizeof(**ctx_id), GFP_KERNEL)))
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return GSS_S_FAILURE;
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memset(*ctx_id, 0, sizeof(**ctx_id));
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(*ctx_id)->mech_type = gss_mech_get(mech);
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return mech->gm_ops
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->gss_import_sec_context(input_token, bufsize, *ctx_id);
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}
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/* gss_get_mic: compute a mic over message and return mic_token. */
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u32
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gss_get_mic(struct gss_ctx *context_handle,
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struct xdr_buf *message,
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struct xdr_netobj *mic_token)
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{
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return context_handle->mech_type->gm_ops
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->gss_get_mic(context_handle,
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message,
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mic_token);
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}
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/* gss_verify_mic: check whether the provided mic_token verifies message. */
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u32
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gss_verify_mic(struct gss_ctx *context_handle,
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struct xdr_buf *message,
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struct xdr_netobj *mic_token)
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{
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return context_handle->mech_type->gm_ops
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->gss_verify_mic(context_handle,
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message,
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mic_token);
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}
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u32
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gss_wrap(struct gss_ctx *ctx_id,
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int offset,
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struct xdr_buf *buf,
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struct page **inpages)
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{
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return ctx_id->mech_type->gm_ops
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->gss_wrap(ctx_id, offset, buf, inpages);
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}
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u32
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gss_unwrap(struct gss_ctx *ctx_id,
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int offset,
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struct xdr_buf *buf)
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{
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return ctx_id->mech_type->gm_ops
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->gss_unwrap(ctx_id, offset, buf);
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}
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/* gss_delete_sec_context: free all resources associated with context_handle.
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* Note this differs from the RFC 2744-specified prototype in that we don't
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* bother returning an output token, since it would never be used anyway. */
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u32
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gss_delete_sec_context(struct gss_ctx **context_handle)
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{
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dprintk("RPC: gss_delete_sec_context deleting %p\n",
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*context_handle);
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if (!*context_handle)
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return(GSS_S_NO_CONTEXT);
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if ((*context_handle)->internal_ctx_id != 0)
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(*context_handle)->mech_type->gm_ops
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->gss_delete_sec_context((*context_handle)
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->internal_ctx_id);
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if ((*context_handle)->mech_type)
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gss_mech_put((*context_handle)->mech_type);
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kfree(*context_handle);
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*context_handle=NULL;
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return GSS_S_COMPLETE;
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}
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