191 строка
6.2 KiB
C
191 строка
6.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* linux/include/linux/sunrpc/svcauth.h
|
|
*
|
|
* RPC server-side authentication stuff.
|
|
*
|
|
* Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de>
|
|
*/
|
|
|
|
#ifndef _LINUX_SUNRPC_SVCAUTH_H_
|
|
#define _LINUX_SUNRPC_SVCAUTH_H_
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
#include <linux/string.h>
|
|
#include <linux/sunrpc/msg_prot.h>
|
|
#include <linux/sunrpc/cache.h>
|
|
#include <linux/sunrpc/gss_api.h>
|
|
#include <linux/hash.h>
|
|
#include <linux/stringhash.h>
|
|
#include <linux/cred.h>
|
|
|
|
struct svc_cred {
|
|
kuid_t cr_uid;
|
|
kgid_t cr_gid;
|
|
struct group_info *cr_group_info;
|
|
u32 cr_flavor; /* pseudoflavor */
|
|
/* name of form servicetype/hostname@REALM, passed down by
|
|
* gss-proxy: */
|
|
char *cr_raw_principal;
|
|
/* name of form servicetype@hostname, passed down by
|
|
* rpc.svcgssd, or computed from the above: */
|
|
char *cr_principal;
|
|
char *cr_targ_princ;
|
|
struct gss_api_mech *cr_gss_mech;
|
|
};
|
|
|
|
static inline void init_svc_cred(struct svc_cred *cred)
|
|
{
|
|
cred->cr_group_info = NULL;
|
|
cred->cr_raw_principal = NULL;
|
|
cred->cr_principal = NULL;
|
|
cred->cr_targ_princ = NULL;
|
|
cred->cr_gss_mech = NULL;
|
|
}
|
|
|
|
static inline void free_svc_cred(struct svc_cred *cred)
|
|
{
|
|
if (cred->cr_group_info)
|
|
put_group_info(cred->cr_group_info);
|
|
kfree(cred->cr_raw_principal);
|
|
kfree(cred->cr_principal);
|
|
kfree(cred->cr_targ_princ);
|
|
gss_mech_put(cred->cr_gss_mech);
|
|
init_svc_cred(cred);
|
|
}
|
|
|
|
struct svc_rqst; /* forward decl */
|
|
struct in6_addr;
|
|
|
|
/* Authentication is done in the context of a domain.
|
|
*
|
|
* Currently, the nfs server uses the auth_domain to stand
|
|
* for the "client" listed in /etc/exports.
|
|
*
|
|
* More generally, a domain might represent a group of clients using
|
|
* a common mechanism for authentication and having a common mapping
|
|
* between local identity (uid) and network identity. All clients
|
|
* in a domain have similar general access rights. Each domain can
|
|
* contain multiple principals which will have different specific right
|
|
* based on normal Discretionary Access Control.
|
|
*
|
|
* A domain is created by an authentication flavour module based on name
|
|
* only. Userspace then fills in detail on demand.
|
|
*
|
|
* In the case of auth_unix and auth_null, the auth_domain is also
|
|
* associated with entries in another cache representing the mapping
|
|
* of ip addresses to the given client.
|
|
*/
|
|
struct auth_domain {
|
|
struct kref ref;
|
|
struct hlist_node hash;
|
|
char *name;
|
|
struct auth_ops *flavour;
|
|
struct rcu_head rcu_head;
|
|
};
|
|
|
|
/*
|
|
* Each authentication flavour registers an auth_ops
|
|
* structure.
|
|
* name is simply the name.
|
|
* flavour gives the auth flavour. It determines where the flavour is registered
|
|
* accept() is given a request and should verify it.
|
|
* It should inspect the authenticator and verifier, and possibly the data.
|
|
* If there is a problem with the authentication *authp should be set.
|
|
* The return value of accept() can indicate:
|
|
* OK - authorised. client and credential are set in rqstp.
|
|
* reqbuf points to arguments
|
|
* resbuf points to good place for results. verfier
|
|
* is (probably) already in place. Certainly space is
|
|
* reserved for it.
|
|
* DROP - simply drop the request. It may have been deferred
|
|
* GARBAGE - rpc garbage_args error
|
|
* SYSERR - rpc system_err error
|
|
* DENIED - authp holds reason for denial.
|
|
* COMPLETE - the reply is encoded already and ready to be sent; no
|
|
* further processing is necessary. (This is used for processing
|
|
* null procedure calls which are used to set up encryption
|
|
* contexts.)
|
|
*
|
|
* accept is passed the proc number so that it can accept NULL rpc requests
|
|
* even if it cannot authenticate the client (as is sometimes appropriate).
|
|
*
|
|
* release() is given a request after the procedure has been run.
|
|
* It should sign/encrypt the results if needed
|
|
* It should return:
|
|
* OK - the resbuf is ready to be sent
|
|
* DROP - the reply should be quitely dropped
|
|
* DENIED - authp holds a reason for MSG_DENIED
|
|
* SYSERR - rpc system_err
|
|
*
|
|
* domain_release()
|
|
* This call releases a domain.
|
|
* set_client()
|
|
* Givens a pending request (struct svc_rqst), finds and assigns
|
|
* an appropriate 'auth_domain' as the client.
|
|
*/
|
|
struct auth_ops {
|
|
char * name;
|
|
struct module *owner;
|
|
int flavour;
|
|
int (*accept)(struct svc_rqst *rq, __be32 *authp);
|
|
int (*release)(struct svc_rqst *rq);
|
|
void (*domain_release)(struct auth_domain *);
|
|
int (*set_client)(struct svc_rqst *rq);
|
|
};
|
|
|
|
#define SVC_GARBAGE 1
|
|
#define SVC_SYSERR 2
|
|
#define SVC_VALID 3
|
|
#define SVC_NEGATIVE 4
|
|
#define SVC_OK 5
|
|
#define SVC_DROP 6
|
|
#define SVC_CLOSE 7 /* Like SVC_DROP, but request is definitely
|
|
* lost so if there is a tcp connection, it
|
|
* should be closed
|
|
*/
|
|
#define SVC_DENIED 8
|
|
#define SVC_PENDING 9
|
|
#define SVC_COMPLETE 10
|
|
|
|
struct svc_xprt;
|
|
|
|
extern int svc_authenticate(struct svc_rqst *rqstp, __be32 *authp);
|
|
extern int svc_authorise(struct svc_rqst *rqstp);
|
|
extern int svc_set_client(struct svc_rqst *rqstp);
|
|
extern int svc_auth_register(rpc_authflavor_t flavor, struct auth_ops *aops);
|
|
extern void svc_auth_unregister(rpc_authflavor_t flavor);
|
|
|
|
extern struct auth_domain *unix_domain_find(char *name);
|
|
extern void auth_domain_put(struct auth_domain *item);
|
|
extern int auth_unix_add_addr(struct net *net, struct in6_addr *addr, struct auth_domain *dom);
|
|
extern struct auth_domain *auth_domain_lookup(char *name, struct auth_domain *new);
|
|
extern struct auth_domain *auth_domain_find(char *name);
|
|
extern struct auth_domain *auth_unix_lookup(struct net *net, struct in6_addr *addr);
|
|
extern int auth_unix_forget_old(struct auth_domain *dom);
|
|
extern void svcauth_unix_purge(struct net *net);
|
|
extern void svcauth_unix_info_release(struct svc_xprt *xpt);
|
|
extern int svcauth_unix_set_client(struct svc_rqst *rqstp);
|
|
|
|
extern int unix_gid_cache_create(struct net *net);
|
|
extern void unix_gid_cache_destroy(struct net *net);
|
|
|
|
/*
|
|
* The <stringhash.h> functions are good enough that we don't need to
|
|
* use hash_32() on them; just extracting the high bits is enough.
|
|
*/
|
|
static inline unsigned long hash_str(char const *name, int bits)
|
|
{
|
|
return hashlen_hash(hashlen_string(NULL, name)) >> (32 - bits);
|
|
}
|
|
|
|
static inline unsigned long hash_mem(char const *buf, int length, int bits)
|
|
{
|
|
return full_name_hash(NULL, buf, length) >> (32 - bits);
|
|
}
|
|
|
|
#endif /* __KERNEL__ */
|
|
|
|
#endif /* _LINUX_SUNRPC_SVCAUTH_H_ */
|