Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/net/sunrpc/auth_null.c |
| 3 | * |
| 4 | * AUTH_NULL authentication. Really :-) |
| 5 | * |
| 6 | * Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de> |
| 7 | */ |
| 8 | |
| 9 | #include <linux/types.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 10 | #include <linux/module.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 11 | #include <linux/sunrpc/clnt.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 12 | |
Jeff Layton | f895b25 | 2014-11-17 16:58:04 -0500 | [diff] [blame^] | 13 | #if IS_ENABLED(CONFIG_SUNRPC_DEBUG) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 * |
Trond Myklebust | c219066 | 2013-08-26 19:23:04 -0400 | [diff] [blame] | 21 | nul_create(struct rpc_auth_create_args *args, struct rpc_clnt *clnt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | { |
NeilBrown | bd95608 | 2014-07-14 11:28:20 +1000 | [diff] [blame] | 38 | if (flags & RPCAUTH_LOOKUP_RCU) |
| 39 | return &null_cred; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | */ |
Alexey Dobriyan | d8ed029 | 2006-09-26 22:29:38 -0700 | [diff] [blame] | 63 | static __be32 * |
| 64 | nul_marshal(struct rpc_task *task, __be32 *p) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | { |
Trond Myklebust | a17c215 | 2010-07-31 14:29:08 -0400 | [diff] [blame] | 80 | set_bit(RPCAUTH_CRED_UPTODATE, &task->tk_rqstp->rq_cred->cr_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | return 0; |
| 82 | } |
| 83 | |
Alexey Dobriyan | d8ed029 | 2006-09-26 22:29:38 -0700 | [diff] [blame] | 84 | static __be32 * |
| 85 | nul_validate(struct rpc_task *task, __be32 *p) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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); |
Andy Adamson | 35fa5f7 | 2013-08-14 11:59:17 -0400 | [diff] [blame] | 93 | return ERR_PTR(-EIO); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | } |
| 95 | |
| 96 | size = ntohl(*p++); |
| 97 | if (size != 0) { |
| 98 | printk("RPC: bad verf size: %u\n", size); |
Andy Adamson | 35fa5f7 | 2013-08-14 11:59:17 -0400 | [diff] [blame] | 99 | return ERR_PTR(-EIO); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | } |
| 101 | |
| 102 | return p; |
| 103 | } |
| 104 | |
Trond Myklebust | f1c0a86 | 2007-06-23 20:17:58 -0400 | [diff] [blame] | 105 | const struct rpc_authops authnull_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | .owner = THIS_MODULE, |
| 107 | .au_flavor = RPC_AUTH_NULL, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 108 | .au_name = "NULL", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | .create = nul_create, |
| 110 | .destroy = nul_destroy, |
| 111 | .lookup_cred = nul_lookup_cred, |
| 112 | }; |
| 113 | |
| 114 | static |
| 115 | struct rpc_auth null_auth = { |
| 116 | .au_cslack = 4, |
| 117 | .au_rslack = 2, |
| 118 | .au_ops = &authnull_ops, |
Trond Myklebust | 81039f1 | 2006-06-09 09:34:34 -0400 | [diff] [blame] | 119 | .au_flavor = RPC_AUTH_NULL, |
| 120 | .au_count = ATOMIC_INIT(0), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | }; |
| 122 | |
| 123 | static |
Trond Myklebust | f1c0a86 | 2007-06-23 20:17:58 -0400 | [diff] [blame] | 124 | const struct rpc_credops null_credops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 125 | .cr_name = "AUTH_NULL", |
| 126 | .crdestroy = nul_destroy_cred, |
Trond Myklebust | 5c69104 | 2008-03-12 16:21:07 -0400 | [diff] [blame] | 127 | .crbind = rpcauth_generic_bind_cred, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 128 | .crmatch = nul_match, |
| 129 | .crmarshal = nul_marshal, |
| 130 | .crrefresh = nul_refresh, |
| 131 | .crvalidate = nul_validate, |
| 132 | }; |
| 133 | |
| 134 | static |
| 135 | struct rpc_cred null_cred = { |
Trond Myklebust | e092bdc | 2007-06-23 19:45:36 -0400 | [diff] [blame] | 136 | .cr_lru = LIST_HEAD_INIT(null_cred.cr_lru), |
Trond Myklebust | 4a8c134 | 2007-06-07 10:14:14 -0400 | [diff] [blame] | 137 | .cr_auth = &null_auth, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | .cr_ops = &null_credops, |
| 139 | .cr_count = ATOMIC_INIT(1), |
Trond Myklebust | fc432dd | 2007-06-25 10:15:15 -0400 | [diff] [blame] | 140 | .cr_flags = 1UL << RPCAUTH_CRED_UPTODATE, |
Jeff Layton | f895b25 | 2014-11-17 16:58:04 -0500 | [diff] [blame^] | 141 | #if IS_ENABLED(CONFIG_SUNRPC_DEBUG) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | .cr_magic = RPCAUTH_CRED_MAGIC, |
| 143 | #endif |
| 144 | }; |