[linux.git] / net / sunrpc / auth_null.c

/*
 * linux/net/sunrpc/auth_null.c
 *
 * AUTH_NULL authentication. Really :-)
 *
 * Copyright (C) 1996, Olaf Kirch <[email protected]>
 */

#include <linux/types.h>
#include <linux/module.h>
#include <linux/sunrpc/clnt.h>

#if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
# define RPCDBG_FACILITY	RPCDBG_AUTH
#endif

static struct rpc_auth null_auth;
static struct rpc_cred null_cred;

static struct rpc_auth *
nul_create(struct rpc_auth_create_args *args, struct rpc_clnt *clnt)
{
	atomic_inc(&null_auth.au_count);
	return &null_auth;
}

static void
nul_destroy(struct rpc_auth *auth)
{
}

/*
 * Lookup NULL creds for current process
 */
static struct rpc_cred *
nul_lookup_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags)
{
	if (flags & RPCAUTH_LOOKUP_RCU)
		return &null_cred;
	return get_rpccred(&null_cred);
}

/*
 * Destroy cred handle.
 */
static void
nul_destroy_cred(struct rpc_cred *cred)
{
}

/*
 * Match cred handle against current process
 */
static int
nul_match(struct auth_cred *acred, struct rpc_cred *cred, int taskflags)
{
	return 1;
}

/*
 * Marshal credential.
 */
static __be32 *
nul_marshal(struct rpc_task *task, __be32 *p)
{
	*p++ = htonl(RPC_AUTH_NULL);
	*p++ = 0;
	*p++ = htonl(RPC_AUTH_NULL);
	*p++ = 0;

	return p;
}

/*
 * Refresh credential. This is a no-op for AUTH_NULL
 */
static int
nul_refresh(struct rpc_task *task)
{
	set_bit(RPCAUTH_CRED_UPTODATE, &task->tk_rqstp->rq_cred->cr_flags);
	return 0;
}

static __be32 *
nul_validate(struct rpc_task *task, __be32 *p)
{
	rpc_authflavor_t	flavor;
	u32			size;

	flavor = ntohl(*p++);
	if (flavor != RPC_AUTH_NULL) {
		printk("RPC: bad verf flavor: %u\n", flavor);
		return ERR_PTR(-EIO);
	}

	size = ntohl(*p++);
	if (size != 0) {
		printk("RPC: bad verf size: %u\n", size);
		return ERR_PTR(-EIO);
	}

	return p;
}

const struct rpc_authops authnull_ops = {
	.owner		= THIS_MODULE,
	.au_flavor	= RPC_AUTH_NULL,
	.au_name	= "NULL",
	.create		= nul_create,
	.destroy	= nul_destroy,
	.lookup_cred	= nul_lookup_cred,
};

static
struct rpc_auth null_auth = {
	.au_cslack	= NUL_CALLSLACK,
	.au_rslack	= NUL_REPLYSLACK,
	.au_flags	= RPCAUTH_AUTH_NO_CRKEY_TIMEOUT,
	.au_ops		= &authnull_ops,
	.au_flavor	= RPC_AUTH_NULL,
	.au_count	= ATOMIC_INIT(0),
};

static
const struct rpc_credops null_credops = {
	.cr_name	= "AUTH_NULL",
	.crdestroy	= nul_destroy_cred,
	.crbind		= rpcauth_generic_bind_cred,
	.crmatch	= nul_match,
	.crmarshal	= nul_marshal,
	.crrefresh	= nul_refresh,
	.crvalidate	= nul_validate,
};

static
struct rpc_cred null_cred = {
	.cr_lru		= LIST_HEAD_INIT(null_cred.cr_lru),
	.cr_auth	= &null_auth,
	.cr_ops		= &null_credops,
	.cr_count	= ATOMIC_INIT(1),
	.cr_flags	= 1UL << RPCAUTH_CRED_UPTODATE,
};
Commit	Line	Data
1da177e4 LT	1	/*
	2	* linux/net/sunrpc/auth_null.c
	3	*
	4	* AUTH_NULL authentication. Really :-)
	5	*
	6	* Copyright (C) 1996, Olaf Kirch <[email protected]>
	7	*/
	8
	9	#include <linux/types.h>
1da177e4	10	#include <linux/module.h>
1da177e4	11	#include <linux/sunrpc/clnt.h>
1da177e4	12
f895b252	13	#if IS_ENABLED(CONFIG_SUNRPC_DEBUG)
1da177e4 LT	14	# define RPCDBG_FACILITY RPCDBG_AUTH
	15	#endif
	16
	17	static struct rpc_auth null_auth;
	18	static struct rpc_cred null_cred;
	19
	20	static struct rpc_auth *
c2190661	21	nul_create(struct rpc_auth_create_args args, struct rpc_clnt clnt)
1da177e4 LT	22	{
	23	atomic_inc(&null_auth.au_count);
	24	return &null_auth;
	25	}
	26
	27	static void
	28	nul_destroy(struct rpc_auth *auth)
	29	{
	30	}
	31
	32	/*
	33	* Lookup NULL creds for current process
	34	*/
	35	static struct rpc_cred *
	36	nul_lookup_cred(struct rpc_auth auth, struct auth_cred acred, int flags)
	37	{
bd956080 N	38	if (flags & RPCAUTH_LOOKUP_RCU)
bd956080 N	39	return &null_cred;
1da177e4 LT	40	return get_rpccred(&null_cred);
	41	}
	42
	43	/*
	44	* Destroy cred handle.
	45	*/
	46	static void
	47	nul_destroy_cred(struct rpc_cred *cred)
	48	{
	49	}
	50
	51	/*
	52	* Match cred handle against current process
	53	*/
	54	static int
	55	nul_match(struct auth_cred acred, struct rpc_cred cred, int taskflags)
	56	{
	57	return 1;
	58	}
	59
	60	/*
	61	* Marshal credential.
	62	*/
d8ed029d AD	63	static __be32 *
d8ed029d AD	64	nul_marshal(struct rpc_task task, __be32 p)
1da177e4 LT	65	{
	66	*p++ = htonl(RPC_AUTH_NULL);
	67	*p++ = 0;
	68	*p++ = htonl(RPC_AUTH_NULL);
	69	*p++ = 0;
	70
	71	return p;
	72	}
	73
	74	/*
	75	* Refresh credential. This is a no-op for AUTH_NULL
	76	*/
	77	static int
	78	nul_refresh(struct rpc_task *task)
	79	{
a17c2153	80	set_bit(RPCAUTH_CRED_UPTODATE, &task->tk_rqstp->rq_cred->cr_flags);
1da177e4 LT	81	return 0;
	82	}
	83
d8ed029d AD	84	static __be32 *
d8ed029d AD	85	nul_validate(struct rpc_task task, __be32 p)
1da177e4 LT	86	{
	87	rpc_authflavor_t flavor;
	88	u32 size;
	89
	90	flavor = ntohl(*p++);
	91	if (flavor != RPC_AUTH_NULL) {
	92	printk("RPC: bad verf flavor: %u\n", flavor);
35fa5f7b	93	return ERR_PTR(-EIO);
1da177e4 LT	94	}
	95
	96	size = ntohl(*p++);
	97	if (size != 0) {
	98	printk("RPC: bad verf size: %u\n", size);
35fa5f7b	99	return ERR_PTR(-EIO);
1da177e4 LT	100	}
	101
	102	return p;
	103	}
	104
f1c0a861	105	const struct rpc_authops authnull_ops = {
1da177e4 LT	106	.owner = THIS_MODULE,
1da177e4 LT	107	.au_flavor = RPC_AUTH_NULL,
1da177e4	108	.au_name = "NULL",
1da177e4 LT	109	.create = nul_create,
	110	.destroy = nul_destroy,
	111	.lookup_cred = nul_lookup_cred,
	112	};
	113
	114	static
	115	struct rpc_auth null_auth = {
4500632f CL	116	.au_cslack = NUL_CALLSLACK,
4500632f CL	117	.au_rslack = NUL_REPLYSLACK,
ce52914e	118	.au_flags = RPCAUTH_AUTH_NO_CRKEY_TIMEOUT,
1da177e4	119	.au_ops = &authnull_ops,
81039f1f TM	120	.au_flavor = RPC_AUTH_NULL,
81039f1f TM	121	.au_count = ATOMIC_INIT(0),
1da177e4 LT	122	};
	123
	124	static
f1c0a861	125	const struct rpc_credops null_credops = {
1da177e4 LT	126	.cr_name = "AUTH_NULL",
1da177e4 LT	127	.crdestroy = nul_destroy_cred,
5c691044	128	.crbind = rpcauth_generic_bind_cred,
1da177e4 LT	129	.crmatch = nul_match,
	130	.crmarshal = nul_marshal,
	131	.crrefresh = nul_refresh,
	132	.crvalidate = nul_validate,
	133	};
	134
	135	static
	136	struct rpc_cred null_cred = {
e092bdcd	137	.cr_lru = LIST_HEAD_INIT(null_cred.cr_lru),
4a8c1344	138	.cr_auth = &null_auth,
1da177e4 LT	139	.cr_ops = &null_credops,
1da177e4 LT	140	.cr_count = ATOMIC_INIT(1),
fc432dd9	141	.cr_flags = 1UL << RPCAUTH_CRED_UPTODATE,
1da177e4	142	};