mirror of
https://github.com/torvalds/linux.git
synced 2024-12-14 07:02:23 +00:00
f895b252d4
It's always set to whatever CONFIG_SUNRPC_DEBUG is, so just use that. Signed-off-by: Jeff Layton <jlayton@primarydata.com> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
482 lines
12 KiB
C
482 lines
12 KiB
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/oid_registry.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>
|
|
|
|
#if IS_ENABLED(CONFIG_SUNRPC_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;
|
|
}
|
|
|
|
/**
|
|
* gss_mech_register - register a GSS mechanism
|
|
* @gm: GSS mechanism handle
|
|
*
|
|
* Returns zero if successful, or a negative errno.
|
|
*/
|
|
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_GPL(gss_mech_register);
|
|
|
|
/**
|
|
* gss_mech_unregister - release a GSS mechanism
|
|
* @gm: GSS mechanism handle
|
|
*
|
|
*/
|
|
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_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(gss_mech_get);
|
|
|
|
static 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;
|
|
|
|
}
|
|
|
|
struct gss_api_mech * gss_mech_get_by_name(const char *name)
|
|
{
|
|
struct gss_api_mech *gm = NULL;
|
|
|
|
gm = _gss_mech_get_by_name(name);
|
|
if (!gm) {
|
|
request_module("rpc-auth-gss-%s", name);
|
|
gm = _gss_mech_get_by_name(name);
|
|
}
|
|
return gm;
|
|
}
|
|
|
|
struct gss_api_mech *gss_mech_get_by_OID(struct rpcsec_gss_oid *obj)
|
|
{
|
|
struct gss_api_mech *pos, *gm = NULL;
|
|
char buf[32];
|
|
|
|
if (sprint_oid(obj->data, obj->len, buf, sizeof(buf)) < 0)
|
|
return NULL;
|
|
dprintk("RPC: %s(%s)\n", __func__, buf);
|
|
request_module("rpc-auth-gss-%s", buf);
|
|
|
|
spin_lock(®istered_mechs_lock);
|
|
list_for_each_entry(pos, ®istered_mechs, gm_list) {
|
|
if (obj->len == pos->gm_oid.len) {
|
|
if (0 == memcmp(obj->data, pos->gm_oid.data, obj->len)) {
|
|
if (try_module_get(pos->gm_owner))
|
|
gm = pos;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
spin_unlock(®istered_mechs_lock);
|
|
return gm;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
static struct gss_api_mech *_gss_mech_get_by_pseudoflavor(u32 pseudoflavor)
|
|
{
|
|
struct gss_api_mech *gm = NULL, *pos;
|
|
|
|
spin_lock(®istered_mechs_lock);
|
|
list_for_each_entry(pos, ®istered_mechs, gm_list) {
|
|
if (!mech_supports_pseudoflavor(pos, pseudoflavor))
|
|
continue;
|
|
if (try_module_get(pos->gm_owner))
|
|
gm = pos;
|
|
break;
|
|
}
|
|
spin_unlock(®istered_mechs_lock);
|
|
return gm;
|
|
}
|
|
|
|
struct gss_api_mech *
|
|
gss_mech_get_by_pseudoflavor(u32 pseudoflavor)
|
|
{
|
|
struct gss_api_mech *gm;
|
|
|
|
gm = _gss_mech_get_by_pseudoflavor(pseudoflavor);
|
|
|
|
if (!gm) {
|
|
request_module("rpc-auth-gss-%u", pseudoflavor);
|
|
gm = _gss_mech_get_by_pseudoflavor(pseudoflavor);
|
|
}
|
|
return gm;
|
|
}
|
|
|
|
/**
|
|
* gss_mech_list_pseudoflavors - Discover registered GSS pseudoflavors
|
|
* @array: array to fill in
|
|
* @size: size of "array"
|
|
*
|
|
* Returns the number of array items filled in, or a negative errno.
|
|
*
|
|
* The returned array is not sorted by any policy. Callers should not
|
|
* rely on the order of the items in the returned array.
|
|
*/
|
|
int gss_mech_list_pseudoflavors(rpc_authflavor_t *array_ptr, int size)
|
|
{
|
|
struct gss_api_mech *pos = NULL;
|
|
int j, i = 0;
|
|
|
|
spin_lock(®istered_mechs_lock);
|
|
list_for_each_entry(pos, ®istered_mechs, gm_list) {
|
|
for (j = 0; j < pos->gm_pf_num; j++) {
|
|
if (i >= size) {
|
|
spin_unlock(®istered_mechs_lock);
|
|
return -ENOMEM;
|
|
}
|
|
array_ptr[i++] = pos->gm_pfs[j].pseudoflavor;
|
|
}
|
|
}
|
|
spin_unlock(®istered_mechs_lock);
|
|
return i;
|
|
}
|
|
|
|
/**
|
|
* gss_svc_to_pseudoflavor - map a GSS service number to a pseudoflavor
|
|
* @gm: GSS mechanism handle
|
|
* @qop: GSS quality-of-protection value
|
|
* @service: GSS service value
|
|
*
|
|
* Returns a matching security flavor, or RPC_AUTH_MAXFLAVOR if none is found.
|
|
*/
|
|
rpc_authflavor_t gss_svc_to_pseudoflavor(struct gss_api_mech *gm, u32 qop,
|
|
u32 service)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < gm->gm_pf_num; i++) {
|
|
if (gm->gm_pfs[i].qop == qop &&
|
|
gm->gm_pfs[i].service == service) {
|
|
return gm->gm_pfs[i].pseudoflavor;
|
|
}
|
|
}
|
|
return RPC_AUTH_MAXFLAVOR;
|
|
}
|
|
|
|
/**
|
|
* gss_mech_info2flavor - look up a pseudoflavor given a GSS tuple
|
|
* @info: a GSS mech OID, quality of protection, and service value
|
|
*
|
|
* Returns a matching pseudoflavor, or RPC_AUTH_MAXFLAVOR if the tuple is
|
|
* not supported.
|
|
*/
|
|
rpc_authflavor_t gss_mech_info2flavor(struct rpcsec_gss_info *info)
|
|
{
|
|
rpc_authflavor_t pseudoflavor;
|
|
struct gss_api_mech *gm;
|
|
|
|
gm = gss_mech_get_by_OID(&info->oid);
|
|
if (gm == NULL)
|
|
return RPC_AUTH_MAXFLAVOR;
|
|
|
|
pseudoflavor = gss_svc_to_pseudoflavor(gm, info->qop, info->service);
|
|
|
|
gss_mech_put(gm);
|
|
return pseudoflavor;
|
|
}
|
|
|
|
/**
|
|
* gss_mech_flavor2info - look up a GSS tuple for a given pseudoflavor
|
|
* @pseudoflavor: GSS pseudoflavor to match
|
|
* @info: rpcsec_gss_info structure to fill in
|
|
*
|
|
* Returns zero and fills in "info" if pseudoflavor matches a
|
|
* supported mechanism. Otherwise a negative errno is returned.
|
|
*/
|
|
int gss_mech_flavor2info(rpc_authflavor_t pseudoflavor,
|
|
struct rpcsec_gss_info *info)
|
|
{
|
|
struct gss_api_mech *gm;
|
|
int i;
|
|
|
|
gm = gss_mech_get_by_pseudoflavor(pseudoflavor);
|
|
if (gm == NULL)
|
|
return -ENOENT;
|
|
|
|
for (i = 0; i < gm->gm_pf_num; i++) {
|
|
if (gm->gm_pfs[i].pseudoflavor == pseudoflavor) {
|
|
memcpy(info->oid.data, gm->gm_oid.data, gm->gm_oid.len);
|
|
info->oid.len = gm->gm_oid.len;
|
|
info->qop = gm->gm_pfs[i].qop;
|
|
info->service = gm->gm_pfs[i].service;
|
|
gss_mech_put(gm);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
gss_mech_put(gm);
|
|
return -ENOENT;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
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,
|
|
time_t *endtime,
|
|
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, endtime, 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;
|
|
}
|