168 lines
5.1 KiB
C
168 lines
5.1 KiB
C
|
/*
|
||
|
* 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/hash.h>
|
||
|
|
||
|
#define SVC_CRED_NGROUPS 32
|
||
|
struct svc_cred {
|
||
|
uid_t cr_uid;
|
||
|
gid_t cr_gid;
|
||
|
struct group_info *cr_group_info;
|
||
|
};
|
||
|
|
||
|
struct svc_rqst; /* forward decl */
|
||
|
|
||
|
/* 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 cache_head h;
|
||
|
char *name;
|
||
|
int flavour;
|
||
|
};
|
||
|
|
||
|
/*
|
||
|
* 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.
|
||
|
*/
|
||
|
struct auth_ops {
|
||
|
char * name;
|
||
|
struct module *owner;
|
||
|
int flavour;
|
||
|
int (*accept)(struct svc_rqst *rq, u32 *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_DENIED 7
|
||
|
#define SVC_PENDING 8
|
||
|
#define SVC_COMPLETE 9
|
||
|
|
||
|
|
||
|
extern int svc_authenticate(struct svc_rqst *rqstp, u32 *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 in_addr addr, struct auth_domain *dom);
|
||
|
extern struct auth_domain *auth_domain_lookup(struct auth_domain *item, int set);
|
||
|
extern struct auth_domain *auth_domain_find(char *name);
|
||
|
extern struct auth_domain *auth_unix_lookup(struct in_addr addr);
|
||
|
extern int auth_unix_forget_old(struct auth_domain *dom);
|
||
|
extern void svcauth_unix_purge(void);
|
||
|
|
||
|
static inline unsigned long hash_str(char *name, int bits)
|
||
|
{
|
||
|
unsigned long hash = 0;
|
||
|
unsigned long l = 0;
|
||
|
int len = 0;
|
||
|
unsigned char c;
|
||
|
do {
|
||
|
if (unlikely(!(c = *name++))) {
|
||
|
c = (char)len; len = -1;
|
||
|
}
|
||
|
l = (l << 8) | c;
|
||
|
len++;
|
||
|
if ((len & (BITS_PER_LONG/8-1))==0)
|
||
|
hash = hash_long(hash^l, BITS_PER_LONG);
|
||
|
} while (len);
|
||
|
return hash >> (BITS_PER_LONG - bits);
|
||
|
}
|
||
|
|
||
|
static inline unsigned long hash_mem(char *buf, int length, int bits)
|
||
|
{
|
||
|
unsigned long hash = 0;
|
||
|
unsigned long l = 0;
|
||
|
int len = 0;
|
||
|
unsigned char c;
|
||
|
do {
|
||
|
if (len == length) {
|
||
|
c = (char)len; len = -1;
|
||
|
} else
|
||
|
c = *buf++;
|
||
|
l = (l << 8) | c;
|
||
|
len++;
|
||
|
if ((len & (BITS_PER_LONG/8-1))==0)
|
||
|
hash = hash_long(hash^l, BITS_PER_LONG);
|
||
|
} while (len);
|
||
|
return hash >> (BITS_PER_LONG - bits);
|
||
|
}
|
||
|
|
||
|
extern struct cache_detail auth_domain_cache, ip_map_cache;
|
||
|
|
||
|
#endif /* __KERNEL__ */
|
||
|
|
||
|
#endif /* _LINUX_SUNRPC_SVCAUTH_H_ */
|