Greg Kroah-Hartman | b244131 | 2017-11-01 15:07:57 +0100 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | /* |
| 3 | * linux/net/sunrpc/auth_null.c |
| 4 | * |
| 5 | * AUTH_NULL authentication. Really :-) |
| 6 | * |
| 7 | * Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de> |
| 8 | */ |
| 9 | |
| 10 | #include <linux/types.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 11 | #include <linux/module.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 12 | #include <linux/sunrpc/clnt.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | |
Jeff Layton | f895b25 | 2014-11-17 16:58:04 -0500 | [diff] [blame] | 14 | #if IS_ENABLED(CONFIG_SUNRPC_DEBUG) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 15 | # define RPCDBG_FACILITY RPCDBG_AUTH |
| 16 | #endif |
| 17 | |
| 18 | static struct rpc_auth null_auth; |
| 19 | static struct rpc_cred null_cred; |
| 20 | |
| 21 | static struct rpc_auth * |
Sargun Dhillon | 82b98ca | 2018-07-05 16:48:50 +0000 | [diff] [blame] | 22 | nul_create(const struct rpc_auth_create_args *args, struct rpc_clnt *clnt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | { |
Trond Myklebust | 331bc71 | 2018-10-14 10:40:29 -0400 | [diff] [blame] | 24 | refcount_inc(&null_auth.au_count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | return &null_auth; |
| 26 | } |
| 27 | |
| 28 | static void |
| 29 | nul_destroy(struct rpc_auth *auth) |
| 30 | { |
| 31 | } |
| 32 | |
| 33 | /* |
| 34 | * Lookup NULL creds for current process |
| 35 | */ |
| 36 | static struct rpc_cred * |
| 37 | nul_lookup_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags) |
| 38 | { |
| 39 | return get_rpccred(&null_cred); |
| 40 | } |
| 41 | |
| 42 | /* |
| 43 | * Destroy cred handle. |
| 44 | */ |
| 45 | static void |
| 46 | nul_destroy_cred(struct rpc_cred *cred) |
| 47 | { |
| 48 | } |
| 49 | |
| 50 | /* |
| 51 | * Match cred handle against current process |
| 52 | */ |
| 53 | static int |
| 54 | nul_match(struct auth_cred *acred, struct rpc_cred *cred, int taskflags) |
| 55 | { |
| 56 | return 1; |
| 57 | } |
| 58 | |
| 59 | /* |
| 60 | * Marshal credential. |
| 61 | */ |
Chuck Lever | e8680a2 | 2019-02-11 11:24:48 -0500 | [diff] [blame] | 62 | static int |
| 63 | nul_marshal(struct rpc_task *task, struct xdr_stream *xdr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | { |
Chuck Lever | e8680a2 | 2019-02-11 11:24:48 -0500 | [diff] [blame] | 65 | __be32 *p; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | |
Chuck Lever | e8680a2 | 2019-02-11 11:24:48 -0500 | [diff] [blame] | 67 | p = xdr_reserve_space(xdr, 4 * sizeof(*p)); |
| 68 | if (!p) |
| 69 | return -EMSGSIZE; |
| 70 | /* Credential */ |
| 71 | *p++ = rpc_auth_null; |
| 72 | *p++ = xdr_zero; |
| 73 | /* Verifier */ |
| 74 | *p++ = rpc_auth_null; |
| 75 | *p = xdr_zero; |
| 76 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | } |
| 78 | |
| 79 | /* |
| 80 | * Refresh credential. This is a no-op for AUTH_NULL |
| 81 | */ |
| 82 | static int |
| 83 | nul_refresh(struct rpc_task *task) |
| 84 | { |
Trond Myklebust | a17c215 | 2010-07-31 14:29:08 -0400 | [diff] [blame] | 85 | set_bit(RPCAUTH_CRED_UPTODATE, &task->tk_rqstp->rq_cred->cr_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | return 0; |
| 87 | } |
| 88 | |
Chuck Lever | a0584ee | 2019-02-11 11:24:58 -0500 | [diff] [blame] | 89 | static int |
| 90 | nul_validate(struct rpc_task *task, struct xdr_stream *xdr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | { |
Chuck Lever | a0584ee | 2019-02-11 11:24:58 -0500 | [diff] [blame] | 92 | __be32 *p; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | |
Chuck Lever | a0584ee | 2019-02-11 11:24:58 -0500 | [diff] [blame] | 94 | p = xdr_inline_decode(xdr, 2 * sizeof(*p)); |
| 95 | if (!p) |
| 96 | return -EIO; |
| 97 | if (*p++ != rpc_auth_null) |
| 98 | return -EIO; |
| 99 | if (*p != xdr_zero) |
| 100 | return -EIO; |
| 101 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | } |
| 103 | |
Trond Myklebust | f1c0a861 | 2007-06-23 20:17:58 -0400 | [diff] [blame] | 104 | const struct rpc_authops authnull_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | .owner = THIS_MODULE, |
| 106 | .au_flavor = RPC_AUTH_NULL, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 107 | .au_name = "NULL", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 108 | .create = nul_create, |
| 109 | .destroy = nul_destroy, |
| 110 | .lookup_cred = nul_lookup_cred, |
| 111 | }; |
| 112 | |
| 113 | static |
| 114 | struct rpc_auth null_auth = { |
Chuck Lever | 4500632 | 2016-03-01 13:06:02 -0500 | [diff] [blame] | 115 | .au_cslack = NUL_CALLSLACK, |
| 116 | .au_rslack = NUL_REPLYSLACK, |
Chuck Lever | a00275b | 2019-02-11 11:25:31 -0500 | [diff] [blame] | 117 | .au_verfsize = NUL_REPLYSLACK, |
Chuck Lever | 35e77d2 | 2019-02-11 11:25:36 -0500 | [diff] [blame] | 118 | .au_ralign = NUL_REPLYSLACK, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | .au_ops = &authnull_ops, |
Trond Myklebust | 81039f1 | 2006-06-09 09:34:34 -0400 | [diff] [blame] | 120 | .au_flavor = RPC_AUTH_NULL, |
Trond Myklebust | 331bc71 | 2018-10-14 10:40:29 -0400 | [diff] [blame] | 121 | .au_count = REFCOUNT_INIT(1), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | }; |
| 123 | |
| 124 | static |
Trond Myklebust | f1c0a861 | 2007-06-23 20:17:58 -0400 | [diff] [blame] | 125 | const struct rpc_credops null_credops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 126 | .cr_name = "AUTH_NULL", |
| 127 | .crdestroy = nul_destroy_cred, |
| 128 | .crmatch = nul_match, |
| 129 | .crmarshal = nul_marshal, |
Chuck Lever | e8680a2 | 2019-02-11 11:24:48 -0500 | [diff] [blame] | 130 | .crwrap_req = rpcauth_wrap_req_encode, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 131 | .crrefresh = nul_refresh, |
| 132 | .crvalidate = nul_validate, |
Chuck Lever | a0584ee | 2019-02-11 11:24:58 -0500 | [diff] [blame] | 133 | .crunwrap_resp = rpcauth_unwrap_resp_decode, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | }; |
| 135 | |
| 136 | static |
| 137 | struct rpc_cred null_cred = { |
Trond Myklebust | e092bdc | 2007-06-23 19:45:36 -0400 | [diff] [blame] | 138 | .cr_lru = LIST_HEAD_INIT(null_cred.cr_lru), |
Trond Myklebust | 4a8c134 | 2007-06-07 10:14:14 -0400 | [diff] [blame] | 139 | .cr_auth = &null_auth, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 140 | .cr_ops = &null_credops, |
Trond Myklebust | 79b1818 | 2018-10-14 10:34:31 -0400 | [diff] [blame] | 141 | .cr_count = REFCOUNT_INIT(2), |
Trond Myklebust | fc432dd | 2007-06-25 10:15:15 -0400 | [diff] [blame] | 142 | .cr_flags = 1UL << RPCAUTH_CRED_UPTODATE, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | }; |