Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * linux/net/sunrpc/gss_spkm3_mech.c | |
3 | * | |
4 | * Copyright (c) 2003 The Regents of the University of Michigan. | |
5 | * All rights reserved. | |
6 | * | |
7 | * Andy Adamson <andros@umich.edu> | |
8 | * J. Bruce Fields <bfields@umich.edu> | |
9 | * | |
10 | * Redistribution and use in source and binary forms, with or without | |
11 | * modification, are permitted provided that the following conditions | |
12 | * are met: | |
13 | * | |
14 | * 1. Redistributions of source code must retain the above copyright | |
15 | * notice, this list of conditions and the following disclaimer. | |
16 | * 2. Redistributions in binary form must reproduce the above copyright | |
17 | * notice, this list of conditions and the following disclaimer in the | |
18 | * documentation and/or other materials provided with the distribution. | |
19 | * 3. Neither the name of the University nor the names of its | |
20 | * contributors may be used to endorse or promote products derived | |
21 | * from this software without specific prior written permission. | |
22 | * | |
23 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
24 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
25 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
26 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
27 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
28 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
29 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR | |
30 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
31 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
32 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
33 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
34 | * | |
35 | */ | |
36 | ||
378c6697 | 37 | #include <linux/err.h> |
1da177e4 LT |
38 | #include <linux/module.h> |
39 | #include <linux/init.h> | |
40 | #include <linux/types.h> | |
41 | #include <linux/slab.h> | |
42 | #include <linux/sunrpc/auth.h> | |
43 | #include <linux/in.h> | |
44 | #include <linux/sunrpc/svcauth_gss.h> | |
45 | #include <linux/sunrpc/gss_spkm3.h> | |
46 | #include <linux/sunrpc/xdr.h> | |
47 | #include <linux/crypto.h> | |
48 | ||
49 | #ifdef RPC_DEBUG | |
50 | # define RPCDBG_FACILITY RPCDBG_AUTH | |
51 | #endif | |
52 | ||
53 | static const void * | |
54 | simple_get_bytes(const void *p, const void *end, void *res, int len) | |
55 | { | |
56 | const void *q = (const void *)((const char *)p + len); | |
57 | if (unlikely(q > end || q < p)) | |
58 | return ERR_PTR(-EFAULT); | |
59 | memcpy(res, p, len); | |
60 | return q; | |
61 | } | |
62 | ||
63 | static const void * | |
64 | simple_get_netobj(const void *p, const void *end, struct xdr_netobj *res) | |
65 | { | |
66 | const void *q; | |
67 | unsigned int len; | |
68 | p = simple_get_bytes(p, end, &len, sizeof(len)); | |
69 | if (IS_ERR(p)) | |
70 | return p; | |
71 | res->len = len; | |
72 | if (len == 0) { | |
73 | res->data = NULL; | |
74 | return p; | |
75 | } | |
76 | q = (const void *)((const char *)p + len); | |
77 | if (unlikely(q > end || q < p)) | |
78 | return ERR_PTR(-EFAULT); | |
0f38b873 | 79 | res->data = kmemdup(p, len, GFP_NOFS); |
1da177e4 LT |
80 | if (unlikely(res->data == NULL)) |
81 | return ERR_PTR(-ENOMEM); | |
1da177e4 LT |
82 | return q; |
83 | } | |
84 | ||
1da177e4 LT |
85 | static int |
86 | gss_import_sec_context_spkm3(const void *p, size_t len, | |
1f4c86c0 TM |
87 | struct gss_ctx *ctx_id, |
88 | gfp_t gfp_mask) | |
1da177e4 LT |
89 | { |
90 | const void *end = (const void *)((const char *)p + len); | |
91 | struct spkm3_ctx *ctx; | |
adeb8133 | 92 | int version; |
1da177e4 | 93 | |
1f4c86c0 | 94 | if (!(ctx = kzalloc(sizeof(*ctx), gfp_mask))) |
1da177e4 | 95 | goto out_err; |
1da177e4 | 96 | |
adeb8133 OK |
97 | p = simple_get_bytes(p, end, &version, sizeof(version)); |
98 | if (IS_ERR(p)) | |
99 | goto out_err_free_ctx; | |
100 | if (version != 1) { | |
8885cb36 CL |
101 | dprintk("RPC: unknown spkm3 token format: " |
102 | "obsolete nfs-utils?\n"); | |
adeb8133 OK |
103 | goto out_err_free_ctx; |
104 | } | |
105 | ||
1da177e4 LT |
106 | p = simple_get_netobj(p, end, &ctx->ctx_id); |
107 | if (IS_ERR(p)) | |
108 | goto out_err_free_ctx; | |
109 | ||
adeb8133 | 110 | p = simple_get_bytes(p, end, &ctx->endtime, sizeof(ctx->endtime)); |
1da177e4 LT |
111 | if (IS_ERR(p)) |
112 | goto out_err_free_ctx_id; | |
113 | ||
114 | p = simple_get_netobj(p, end, &ctx->mech_used); | |
115 | if (IS_ERR(p)) | |
adeb8133 | 116 | goto out_err_free_ctx_id; |
1da177e4 LT |
117 | |
118 | p = simple_get_bytes(p, end, &ctx->ret_flags, sizeof(ctx->ret_flags)); | |
119 | if (IS_ERR(p)) | |
120 | goto out_err_free_mech; | |
121 | ||
adeb8133 | 122 | p = simple_get_netobj(p, end, &ctx->conf_alg); |
1da177e4 LT |
123 | if (IS_ERR(p)) |
124 | goto out_err_free_mech; | |
125 | ||
adeb8133 | 126 | p = simple_get_netobj(p, end, &ctx->derived_conf_key); |
1da177e4 | 127 | if (IS_ERR(p)) |
adeb8133 | 128 | goto out_err_free_conf_alg; |
1da177e4 | 129 | |
adeb8133 | 130 | p = simple_get_netobj(p, end, &ctx->intg_alg); |
1da177e4 | 131 | if (IS_ERR(p)) |
adeb8133 | 132 | goto out_err_free_conf_key; |
1da177e4 | 133 | |
adeb8133 | 134 | p = simple_get_netobj(p, end, &ctx->derived_integ_key); |
1da177e4 | 135 | if (IS_ERR(p)) |
adeb8133 | 136 | goto out_err_free_intg_alg; |
1da177e4 LT |
137 | |
138 | if (p != end) | |
adeb8133 | 139 | goto out_err_free_intg_key; |
1da177e4 LT |
140 | |
141 | ctx_id->internal_ctx_id = ctx; | |
142 | ||
8885cb36 | 143 | dprintk("RPC: Successfully imported new spkm context.\n"); |
1da177e4 LT |
144 | return 0; |
145 | ||
adeb8133 OK |
146 | out_err_free_intg_key: |
147 | kfree(ctx->derived_integ_key.data); | |
148 | out_err_free_intg_alg: | |
149 | kfree(ctx->intg_alg.data); | |
150 | out_err_free_conf_key: | |
151 | kfree(ctx->derived_conf_key.data); | |
152 | out_err_free_conf_alg: | |
153 | kfree(ctx->conf_alg.data); | |
1da177e4 LT |
154 | out_err_free_mech: |
155 | kfree(ctx->mech_used.data); | |
156 | out_err_free_ctx_id: | |
157 | kfree(ctx->ctx_id.data); | |
158 | out_err_free_ctx: | |
159 | kfree(ctx); | |
160 | out_err: | |
161 | return PTR_ERR(p); | |
162 | } | |
163 | ||
164 | static void | |
adeb8133 OK |
165 | gss_delete_sec_context_spkm3(void *internal_ctx) |
166 | { | |
1da177e4 LT |
167 | struct spkm3_ctx *sctx = internal_ctx; |
168 | ||
adeb8133 OK |
169 | kfree(sctx->derived_integ_key.data); |
170 | kfree(sctx->intg_alg.data); | |
171 | kfree(sctx->derived_conf_key.data); | |
172 | kfree(sctx->conf_alg.data); | |
573dbd95 | 173 | kfree(sctx->mech_used.data); |
adeb8133 | 174 | kfree(sctx->ctx_id.data); |
1da177e4 LT |
175 | kfree(sctx); |
176 | } | |
177 | ||
178 | static u32 | |
179 | gss_verify_mic_spkm3(struct gss_ctx *ctx, | |
180 | struct xdr_buf *signbuf, | |
00fd6e14 BF |
181 | struct xdr_netobj *checksum) |
182 | { | |
1da177e4 | 183 | u32 maj_stat = 0; |
1da177e4 LT |
184 | struct spkm3_ctx *sctx = ctx->internal_ctx_id; |
185 | ||
00fd6e14 | 186 | maj_stat = spkm3_read_token(sctx, checksum, signbuf, SPKM_MIC_TOK); |
1da177e4 | 187 | |
8885cb36 | 188 | dprintk("RPC: gss_verify_mic_spkm3 returning %d\n", maj_stat); |
1da177e4 LT |
189 | return maj_stat; |
190 | } | |
191 | ||
192 | static u32 | |
193 | gss_get_mic_spkm3(struct gss_ctx *ctx, | |
1da177e4 | 194 | struct xdr_buf *message_buffer, |
00fd6e14 BF |
195 | struct xdr_netobj *message_token) |
196 | { | |
1da177e4 LT |
197 | u32 err = 0; |
198 | struct spkm3_ctx *sctx = ctx->internal_ctx_id; | |
199 | ||
00fd6e14 | 200 | err = spkm3_make_token(sctx, message_buffer, |
adeb8133 | 201 | message_token, SPKM_MIC_TOK); |
8885cb36 | 202 | dprintk("RPC: gss_get_mic_spkm3 returning %d\n", err); |
1da177e4 LT |
203 | return err; |
204 | } | |
205 | ||
f1c0a861 | 206 | static const struct gss_api_ops gss_spkm3_ops = { |
1da177e4 LT |
207 | .gss_import_sec_context = gss_import_sec_context_spkm3, |
208 | .gss_get_mic = gss_get_mic_spkm3, | |
209 | .gss_verify_mic = gss_verify_mic_spkm3, | |
210 | .gss_delete_sec_context = gss_delete_sec_context_spkm3, | |
211 | }; | |
212 | ||
213 | static struct pf_desc gss_spkm3_pfs[] = { | |
00fd6e14 BF |
214 | {RPC_AUTH_GSS_SPKM, RPC_GSS_SVC_NONE, "spkm3"}, |
215 | {RPC_AUTH_GSS_SPKMI, RPC_GSS_SVC_INTEGRITY, "spkm3i"}, | |
1da177e4 LT |
216 | }; |
217 | ||
218 | static struct gss_api_mech gss_spkm3_mech = { | |
219 | .gm_name = "spkm3", | |
220 | .gm_owner = THIS_MODULE, | |
ae4c40b1 | 221 | .gm_oid = {7, "\053\006\001\005\005\001\003"}, |
1da177e4 LT |
222 | .gm_ops = &gss_spkm3_ops, |
223 | .gm_pf_num = ARRAY_SIZE(gss_spkm3_pfs), | |
224 | .gm_pfs = gss_spkm3_pfs, | |
225 | }; | |
226 | ||
227 | static int __init init_spkm3_module(void) | |
228 | { | |
229 | int status; | |
230 | ||
231 | status = gss_mech_register(&gss_spkm3_mech); | |
232 | if (status) | |
233 | printk("Failed to register spkm3 gss mechanism!\n"); | |
fadfc8e9 | 234 | return status; |
1da177e4 LT |
235 | } |
236 | ||
237 | static void __exit cleanup_spkm3_module(void) | |
238 | { | |
239 | gss_mech_unregister(&gss_spkm3_mech); | |
240 | } | |
241 | ||
242 | MODULE_LICENSE("GPL"); | |
243 | module_init(init_spkm3_module); | |
244 | module_exit(cleanup_spkm3_module); |