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/err.h>
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>
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>
50 # define RPCDBG_FACILITY RPCDBG_AUTH
54 simple_get_bytes(const void *p, const void *end, void *res, int len)
56 const void *q = (const void *)((const char *)p + len);
57 if (unlikely(q > end || q < p))
58 return ERR_PTR(-EFAULT);
64 simple_get_netobj(const void *p, const void *end, struct xdr_netobj *res)
68 p = simple_get_bytes(p, end, &len, sizeof(len));
76 q = (const void *)((const char *)p + len);
77 if (unlikely(q > end || q < p))
78 return ERR_PTR(-EFAULT);
79 res->data = kmemdup(p, len, GFP_KERNEL);
80 if (unlikely(res->data == NULL))
81 return ERR_PTR(-ENOMEM);
86 gss_import_sec_context_spkm3(const void *p, size_t len,
87 struct gss_ctx *ctx_id)
89 const void *end = (const void *)((const char *)p + len);
90 struct spkm3_ctx *ctx;
93 if (!(ctx = kzalloc(sizeof(*ctx), GFP_KERNEL)))
96 p = simple_get_bytes(p, end, &version, sizeof(version));
98 goto out_err_free_ctx;
100 dprintk("RPC: unknown spkm3 token format: obsolete nfs-utils?\n");
101 goto out_err_free_ctx;
104 p = simple_get_netobj(p, end, &ctx->ctx_id);
106 goto out_err_free_ctx;
108 p = simple_get_bytes(p, end, &ctx->endtime, sizeof(ctx->endtime));
110 goto out_err_free_ctx_id;
112 p = simple_get_netobj(p, end, &ctx->mech_used);
114 goto out_err_free_ctx_id;
116 p = simple_get_bytes(p, end, &ctx->ret_flags, sizeof(ctx->ret_flags));
118 goto out_err_free_mech;
120 p = simple_get_netobj(p, end, &ctx->conf_alg);
122 goto out_err_free_mech;
124 p = simple_get_netobj(p, end, &ctx->derived_conf_key);
126 goto out_err_free_conf_alg;
128 p = simple_get_netobj(p, end, &ctx->intg_alg);
130 goto out_err_free_conf_key;
132 p = simple_get_netobj(p, end, &ctx->derived_integ_key);
134 goto out_err_free_intg_alg;
137 goto out_err_free_intg_key;
139 ctx_id->internal_ctx_id = ctx;
141 dprintk("Successfully imported new spkm context.\n");
144 out_err_free_intg_key:
145 kfree(ctx->derived_integ_key.data);
146 out_err_free_intg_alg:
147 kfree(ctx->intg_alg.data);
148 out_err_free_conf_key:
149 kfree(ctx->derived_conf_key.data);
150 out_err_free_conf_alg:
151 kfree(ctx->conf_alg.data);
153 kfree(ctx->mech_used.data);
155 kfree(ctx->ctx_id.data);
163 gss_delete_sec_context_spkm3(void *internal_ctx)
165 struct spkm3_ctx *sctx = internal_ctx;
167 kfree(sctx->derived_integ_key.data);
168 kfree(sctx->intg_alg.data);
169 kfree(sctx->derived_conf_key.data);
170 kfree(sctx->conf_alg.data);
171 kfree(sctx->mech_used.data);
172 kfree(sctx->ctx_id.data);
177 gss_verify_mic_spkm3(struct gss_ctx *ctx,
178 struct xdr_buf *signbuf,
179 struct xdr_netobj *checksum)
182 struct spkm3_ctx *sctx = ctx->internal_ctx_id;
184 maj_stat = spkm3_read_token(sctx, checksum, signbuf, SPKM_MIC_TOK);
186 dprintk("RPC: gss_verify_mic_spkm3 returning %d\n", maj_stat);
191 gss_get_mic_spkm3(struct gss_ctx *ctx,
192 struct xdr_buf *message_buffer,
193 struct xdr_netobj *message_token)
196 struct spkm3_ctx *sctx = ctx->internal_ctx_id;
198 err = spkm3_make_token(sctx, message_buffer,
199 message_token, SPKM_MIC_TOK);
200 dprintk("RPC: gss_get_mic_spkm3 returning %d\n", err);
204 static struct gss_api_ops gss_spkm3_ops = {
205 .gss_import_sec_context = gss_import_sec_context_spkm3,
206 .gss_get_mic = gss_get_mic_spkm3,
207 .gss_verify_mic = gss_verify_mic_spkm3,
208 .gss_delete_sec_context = gss_delete_sec_context_spkm3,
211 static struct pf_desc gss_spkm3_pfs[] = {
212 {RPC_AUTH_GSS_SPKM, RPC_GSS_SVC_NONE, "spkm3"},
213 {RPC_AUTH_GSS_SPKMI, RPC_GSS_SVC_INTEGRITY, "spkm3i"},
216 static struct gss_api_mech gss_spkm3_mech = {
218 .gm_owner = THIS_MODULE,
219 .gm_ops = &gss_spkm3_ops,
220 .gm_pf_num = ARRAY_SIZE(gss_spkm3_pfs),
221 .gm_pfs = gss_spkm3_pfs,
224 static int __init init_spkm3_module(void)
228 status = gss_mech_register(&gss_spkm3_mech);
230 printk("Failed to register spkm3 gss mechanism!\n");
234 static void __exit cleanup_spkm3_module(void)
236 gss_mech_unregister(&gss_spkm3_mech);
239 MODULE_LICENSE("GPL");
240 module_init(init_spkm3_module);
241 module_exit(cleanup_spkm3_module);