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 = kmalloc(len, GFP_KERNEL);
80 if (unlikely(res->data == NULL))
81 return ERR_PTR(-ENOMEM);
82 memcpy(res->data, p, len);
86 static inline const void *
87 get_key(const void *p, const void *end, struct crypto_blkcipher **res,
90 struct xdr_netobj key = { 0 };
94 p = simple_get_bytes(p, end, resalg, sizeof(*resalg));
97 p = simple_get_netobj(p, end, &key);
103 alg_name = "cbc(des)";
107 /* XXXX here in name only, not used */
108 alg_name = "cbc(cast5)";
109 setkey = 0; /* XXX will need to set to 1 */
113 dprintk("RPC: SPKM3 get_key: NID_md5 zero Key length\n");
119 dprintk("gss_spkm3_mech: unsupported algorithm %d\n", *resalg);
120 goto out_err_free_key;
122 *res = crypto_alloc_blkcipher(alg_name, 0, CRYPTO_ALG_ASYNC);
124 printk("gss_spkm3_mech: unable to initialize crypto algorthm %s\n", alg_name);
126 goto out_err_free_key;
129 if (crypto_blkcipher_setkey(*res, key.data, key.len)) {
130 printk("gss_spkm3_mech: error setting key for crypto algorthm %s\n", alg_name);
131 goto out_err_free_tfm;
140 crypto_free_blkcipher(*res);
144 p = ERR_PTR(-EINVAL);
150 gss_import_sec_context_spkm3(const void *p, size_t len,
151 struct gss_ctx *ctx_id)
153 const void *end = (const void *)((const char *)p + len);
154 struct spkm3_ctx *ctx;
156 if (!(ctx = kzalloc(sizeof(*ctx), GFP_KERNEL)))
159 p = simple_get_netobj(p, end, &ctx->ctx_id);
161 goto out_err_free_ctx;
163 p = simple_get_bytes(p, end, &ctx->qop, sizeof(ctx->qop));
165 goto out_err_free_ctx_id;
167 p = simple_get_netobj(p, end, &ctx->mech_used);
169 goto out_err_free_mech;
171 p = simple_get_bytes(p, end, &ctx->ret_flags, sizeof(ctx->ret_flags));
173 goto out_err_free_mech;
175 p = simple_get_bytes(p, end, &ctx->req_flags, sizeof(ctx->req_flags));
177 goto out_err_free_mech;
179 p = simple_get_netobj(p, end, &ctx->share_key);
181 goto out_err_free_s_key;
183 p = get_key(p, end, &ctx->derived_conf_key, &ctx->conf_alg);
185 goto out_err_free_s_key;
187 p = get_key(p, end, &ctx->derived_integ_key, &ctx->intg_alg);
189 goto out_err_free_key1;
191 p = simple_get_bytes(p, end, &ctx->keyestb_alg, sizeof(ctx->keyestb_alg));
193 goto out_err_free_key2;
195 p = simple_get_bytes(p, end, &ctx->owf_alg, sizeof(ctx->owf_alg));
197 goto out_err_free_key2;
200 goto out_err_free_key2;
202 ctx_id->internal_ctx_id = ctx;
204 dprintk("Successfully imported new spkm context.\n");
208 crypto_free_blkcipher(ctx->derived_integ_key);
210 crypto_free_blkcipher(ctx->derived_conf_key);
212 kfree(ctx->share_key.data);
214 kfree(ctx->mech_used.data);
216 kfree(ctx->ctx_id.data);
224 gss_delete_sec_context_spkm3(void *internal_ctx) {
225 struct spkm3_ctx *sctx = internal_ctx;
227 crypto_free_blkcipher(sctx->derived_integ_key);
228 crypto_free_blkcipher(sctx->derived_conf_key);
229 kfree(sctx->share_key.data);
230 kfree(sctx->mech_used.data);
235 gss_verify_mic_spkm3(struct gss_ctx *ctx,
236 struct xdr_buf *signbuf,
237 struct xdr_netobj *checksum)
240 struct spkm3_ctx *sctx = ctx->internal_ctx_id;
242 dprintk("RPC: gss_verify_mic_spkm3 calling spkm3_read_token\n");
243 maj_stat = spkm3_read_token(sctx, checksum, signbuf, SPKM_MIC_TOK);
245 dprintk("RPC: gss_verify_mic_spkm3 returning %d\n", maj_stat);
250 gss_get_mic_spkm3(struct gss_ctx *ctx,
251 struct xdr_buf *message_buffer,
252 struct xdr_netobj *message_token)
255 struct spkm3_ctx *sctx = ctx->internal_ctx_id;
257 dprintk("RPC: gss_get_mic_spkm3\n");
259 err = spkm3_make_token(sctx, message_buffer,
260 message_token, SPKM_MIC_TOK);
264 static struct gss_api_ops gss_spkm3_ops = {
265 .gss_import_sec_context = gss_import_sec_context_spkm3,
266 .gss_get_mic = gss_get_mic_spkm3,
267 .gss_verify_mic = gss_verify_mic_spkm3,
268 .gss_delete_sec_context = gss_delete_sec_context_spkm3,
271 static struct pf_desc gss_spkm3_pfs[] = {
272 {RPC_AUTH_GSS_SPKM, RPC_GSS_SVC_NONE, "spkm3"},
273 {RPC_AUTH_GSS_SPKMI, RPC_GSS_SVC_INTEGRITY, "spkm3i"},
276 static struct gss_api_mech gss_spkm3_mech = {
278 .gm_owner = THIS_MODULE,
279 .gm_ops = &gss_spkm3_ops,
280 .gm_pf_num = ARRAY_SIZE(gss_spkm3_pfs),
281 .gm_pfs = gss_spkm3_pfs,
284 static int __init init_spkm3_module(void)
288 status = gss_mech_register(&gss_spkm3_mech);
290 printk("Failed to register spkm3 gss mechanism!\n");
294 static void __exit cleanup_spkm3_module(void)
296 gss_mech_unregister(&gss_spkm3_mech);
299 MODULE_LICENSE("GPL");
300 module_init(init_spkm3_module);
301 module_exit(cleanup_spkm3_module);