2 * linux/net/sunrpc/gss_spkm3_mech.c
4 * Copyright (c) 2003 The Regents of the University of Michigan.
7 * Andy Adamson <andros@umich.edu>
8 * J. Bruce Fields <bfields@umich.edu>
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
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.
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.
37 #include <linux/module.h>
38 #include <linux/init.h>
39 #include <linux/types.h>
40 #include <linux/slab.h>
41 #include <linux/sunrpc/auth.h>
43 #include <linux/sunrpc/svcauth_gss.h>
44 #include <linux/sunrpc/gss_spkm3.h>
45 #include <linux/sunrpc/xdr.h>
46 #include <linux/crypto.h>
49 # define RPCDBG_FACILITY RPCDBG_AUTH
52 struct xdr_netobj gss_mech_spkm3_oid
=
53 {7, "\053\006\001\005\005\001\003"};
56 get_bytes(char **ptr
, const char *end
, void *res
, int len
)
69 get_netobj(char **ptr
, const char *end
, struct xdr_netobj
*res
)
73 if (get_bytes(&p
, end
, &res
->len
, sizeof(res
->len
)))
80 if (!(res
->data
= kmalloc(res
->len
, GFP_KERNEL
)))
82 memcpy(res
->data
, p
, res
->len
);
89 get_key(char **p
, char *end
, struct crypto_tfm
**res
, int *resalg
)
91 struct xdr_netobj key
= {
95 int alg_mode
,setkey
= 0;
98 if (get_bytes(p
, end
, resalg
, sizeof(int)))
100 if ((get_netobj(p
, end
, &key
)))
106 alg_mode
= CRYPTO_TFM_MODE_CBC
;
111 dprintk("RPC: SPKM3 get_key: NID_md5 zero Key length\n");
118 dprintk("RPC: SPKM3 get_key: case cast5_cbc, UNSUPPORTED \n");
122 dprintk("RPC: SPKM3 get_key: unsupported algorithm %d", *resalg
);
123 goto out_err_free_key
;
125 if (!(*res
= crypto_alloc_tfm(alg_name
, alg_mode
)))
126 goto out_err_free_key
;
128 if (crypto_cipher_setkey(*res
, key
.data
, key
.len
))
129 goto out_err_free_tfm
;
137 crypto_free_tfm(*res
);
146 gss_import_sec_context_spkm3(struct xdr_netobj
*inbuf
,
147 struct gss_ctx
*ctx_id
)
149 char *p
= inbuf
->data
;
150 char *end
= inbuf
->data
+ inbuf
->len
;
151 struct spkm3_ctx
*ctx
;
153 if (!(ctx
= kmalloc(sizeof(*ctx
), GFP_KERNEL
)))
155 memset(ctx
, 0, sizeof(*ctx
));
157 if (get_netobj(&p
, end
, &ctx
->ctx_id
))
158 goto out_err_free_ctx
;
160 if (get_bytes(&p
, end
, &ctx
->qop
, sizeof(ctx
->qop
)))
161 goto out_err_free_ctx_id
;
163 if (get_netobj(&p
, end
, &ctx
->mech_used
))
164 goto out_err_free_mech
;
166 if (get_bytes(&p
, end
, &ctx
->ret_flags
, sizeof(ctx
->ret_flags
)))
167 goto out_err_free_mech
;
169 if (get_bytes(&p
, end
, &ctx
->req_flags
, sizeof(ctx
->req_flags
)))
170 goto out_err_free_mech
;
172 if (get_netobj(&p
, end
, &ctx
->share_key
))
173 goto out_err_free_s_key
;
175 if (get_key(&p
, end
, &ctx
->derived_conf_key
, &ctx
->conf_alg
)) {
176 dprintk("RPC: SPKM3 confidentiality key will be NULL\n");
179 if (get_key(&p
, end
, &ctx
->derived_integ_key
, &ctx
->intg_alg
)) {
180 dprintk("RPC: SPKM3 integrity key will be NULL\n");
183 if (get_bytes(&p
, end
, &ctx
->owf_alg
, sizeof(ctx
->owf_alg
)))
184 goto out_err_free_s_key
;
186 if (get_bytes(&p
, end
, &ctx
->owf_alg
, sizeof(ctx
->owf_alg
)))
187 goto out_err_free_s_key
;
190 goto out_err_free_s_key
;
192 ctx_id
->internal_ctx_id
= ctx
;
194 dprintk("Succesfully imported new spkm context.\n");
198 kfree(ctx
->share_key
.data
);
200 kfree(ctx
->mech_used
.data
);
202 kfree(ctx
->ctx_id
.data
);
206 return GSS_S_FAILURE
;
210 gss_delete_sec_context_spkm3(void *internal_ctx
) {
211 struct spkm3_ctx
*sctx
= internal_ctx
;
213 if(sctx
->derived_integ_key
)
214 crypto_free_tfm(sctx
->derived_integ_key
);
215 if(sctx
->derived_conf_key
)
216 crypto_free_tfm(sctx
->derived_conf_key
);
217 if(sctx
->share_key
.data
)
218 kfree(sctx
->share_key
.data
);
219 if(sctx
->mech_used
.data
)
220 kfree(sctx
->mech_used
.data
);
225 gss_verify_mic_spkm3(struct gss_ctx
*ctx
,
226 struct xdr_buf
*signbuf
,
227 struct xdr_netobj
*checksum
,
231 struct spkm3_ctx
*sctx
= ctx
->internal_ctx_id
;
233 dprintk("RPC: gss_verify_mic_spkm3 calling spkm3_read_token\n");
234 maj_stat
= spkm3_read_token(sctx
, checksum
, signbuf
, &qop_state
,
237 if (!maj_stat
&& qop_state
)
240 dprintk("RPC: gss_verify_mic_spkm3 returning %d\n", maj_stat
);
245 gss_get_mic_spkm3(struct gss_ctx
*ctx
,
247 struct xdr_buf
*message_buffer
,
248 struct xdr_netobj
*message_token
) {
250 struct spkm3_ctx
*sctx
= ctx
->internal_ctx_id
;
252 dprintk("RPC: gss_get_mic_spkm3\n");
254 err
= spkm3_make_token(sctx
, qop
, message_buffer
,
255 message_token
, SPKM_MIC_TOK
);
259 static struct gss_api_ops gss_spkm3_ops
= {
260 .gss_import_sec_context
= gss_import_sec_context_spkm3
,
261 .gss_get_mic
= gss_get_mic_spkm3
,
262 .gss_verify_mic
= gss_verify_mic_spkm3
,
263 .gss_delete_sec_context
= gss_delete_sec_context_spkm3
,
266 static struct pf_desc gss_spkm3_pfs
[] = {
267 {RPC_AUTH_GSS_SPKM
, 0, RPC_GSS_SVC_NONE
, "spkm3"},
268 {RPC_AUTH_GSS_SPKMI
, 0, RPC_GSS_SVC_INTEGRITY
, "spkm3i"},
271 static struct gss_api_mech gss_spkm3_mech
= {
273 .gm_owner
= THIS_MODULE
,
274 .gm_ops
= &gss_spkm3_ops
,
275 .gm_pf_num
= ARRAY_SIZE(gss_spkm3_pfs
),
276 .gm_pfs
= gss_spkm3_pfs
,
279 static int __init
init_spkm3_module(void)
283 status
= gss_mech_register(&gss_spkm3_mech
);
285 printk("Failed to register spkm3 gss mechanism!\n");
289 static void __exit
cleanup_spkm3_module(void)
291 gss_mech_unregister(&gss_spkm3_mech
);
294 MODULE_LICENSE("GPL");
295 module_init(init_spkm3_module
);
296 module_exit(cleanup_spkm3_module
);