[TG3]: Set minimal hw interrupt mitigation.
[linux-2.6/verdex.git] / net / sunrpc / auth_gss / gss_spkm3_mech.c
blobdad05994c3eb3f934c5446460404a92101e3b7c8
1 /*
2 * linux/net/sunrpc/gss_spkm3_mech.c
4 * Copyright (c) 2003 The Regents of the University of Michigan.
5 * All rights reserved.
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
12 * are met:
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>
42 #include <linux/in.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>
48 #ifdef RPC_DEBUG
49 # define RPCDBG_FACILITY RPCDBG_AUTH
50 #endif
52 static const void *
53 simple_get_bytes(const void *p, const void *end, void *res, int len)
55 const void *q = (const void *)((const char *)p + len);
56 if (unlikely(q > end || q < p))
57 return ERR_PTR(-EFAULT);
58 memcpy(res, p, len);
59 return q;
62 static const void *
63 simple_get_netobj(const void *p, const void *end, struct xdr_netobj *res)
65 const void *q;
66 unsigned int len;
67 p = simple_get_bytes(p, end, &len, sizeof(len));
68 if (IS_ERR(p))
69 return p;
70 res->len = len;
71 if (len == 0) {
72 res->data = NULL;
73 return p;
75 q = (const void *)((const char *)p + len);
76 if (unlikely(q > end || q < p))
77 return ERR_PTR(-EFAULT);
78 res->data = kmalloc(len, GFP_KERNEL);
79 if (unlikely(res->data == NULL))
80 return ERR_PTR(-ENOMEM);
81 memcpy(res->data, p, len);
82 return q;
85 static inline const void *
86 get_key(const void *p, const void *end, struct crypto_tfm **res, int *resalg)
88 struct xdr_netobj key = { 0 };
89 int alg_mode,setkey = 0;
90 char *alg_name;
92 p = simple_get_bytes(p, end, resalg, sizeof(*resalg));
93 if (IS_ERR(p))
94 goto out_err;
95 p = simple_get_netobj(p, end, &key);
96 if (IS_ERR(p))
97 goto out_err;
99 switch (*resalg) {
100 case NID_des_cbc:
101 alg_name = "des";
102 alg_mode = CRYPTO_TFM_MODE_CBC;
103 setkey = 1;
104 break;
105 case NID_md5:
106 if (key.len == 0) {
107 dprintk("RPC: SPKM3 get_key: NID_md5 zero Key length\n");
109 alg_name = "md5";
110 alg_mode = 0;
111 setkey = 0;
112 break;
113 default:
114 dprintk("RPC: SPKM3 get_key: unsupported algorithm %d", *resalg);
115 goto out_err_free_key;
117 if (!(*res = crypto_alloc_tfm(alg_name, alg_mode)))
118 goto out_err_free_key;
119 if (setkey) {
120 if (crypto_cipher_setkey(*res, key.data, key.len))
121 goto out_err_free_tfm;
124 if(key.len > 0)
125 kfree(key.data);
126 return p;
128 out_err_free_tfm:
129 crypto_free_tfm(*res);
130 out_err_free_key:
131 if(key.len > 0)
132 kfree(key.data);
133 p = ERR_PTR(-EINVAL);
134 out_err:
135 return p;
138 static int
139 gss_import_sec_context_spkm3(const void *p, size_t len,
140 struct gss_ctx *ctx_id)
142 const void *end = (const void *)((const char *)p + len);
143 struct spkm3_ctx *ctx;
145 if (!(ctx = kmalloc(sizeof(*ctx), GFP_KERNEL)))
146 goto out_err;
147 memset(ctx, 0, sizeof(*ctx));
149 p = simple_get_netobj(p, end, &ctx->ctx_id);
150 if (IS_ERR(p))
151 goto out_err_free_ctx;
153 p = simple_get_bytes(p, end, &ctx->qop, sizeof(ctx->qop));
154 if (IS_ERR(p))
155 goto out_err_free_ctx_id;
157 p = simple_get_netobj(p, end, &ctx->mech_used);
158 if (IS_ERR(p))
159 goto out_err_free_mech;
161 p = simple_get_bytes(p, end, &ctx->ret_flags, sizeof(ctx->ret_flags));
162 if (IS_ERR(p))
163 goto out_err_free_mech;
165 p = simple_get_bytes(p, end, &ctx->req_flags, sizeof(ctx->req_flags));
166 if (IS_ERR(p))
167 goto out_err_free_mech;
169 p = simple_get_netobj(p, end, &ctx->share_key);
170 if (IS_ERR(p))
171 goto out_err_free_s_key;
173 p = get_key(p, end, &ctx->derived_conf_key, &ctx->conf_alg);
174 if (IS_ERR(p))
175 goto out_err_free_s_key;
177 p = get_key(p, end, &ctx->derived_integ_key, &ctx->intg_alg);
178 if (IS_ERR(p))
179 goto out_err_free_key1;
181 p = simple_get_bytes(p, end, &ctx->keyestb_alg, sizeof(ctx->keyestb_alg));
182 if (IS_ERR(p))
183 goto out_err_free_key2;
185 p = simple_get_bytes(p, end, &ctx->owf_alg, sizeof(ctx->owf_alg));
186 if (IS_ERR(p))
187 goto out_err_free_key2;
189 if (p != end)
190 goto out_err_free_key2;
192 ctx_id->internal_ctx_id = ctx;
194 dprintk("Succesfully imported new spkm context.\n");
195 return 0;
197 out_err_free_key2:
198 crypto_free_tfm(ctx->derived_integ_key);
199 out_err_free_key1:
200 crypto_free_tfm(ctx->derived_conf_key);
201 out_err_free_s_key:
202 kfree(ctx->share_key.data);
203 out_err_free_mech:
204 kfree(ctx->mech_used.data);
205 out_err_free_ctx_id:
206 kfree(ctx->ctx_id.data);
207 out_err_free_ctx:
208 kfree(ctx);
209 out_err:
210 return PTR_ERR(p);
213 static void
214 gss_delete_sec_context_spkm3(void *internal_ctx) {
215 struct spkm3_ctx *sctx = internal_ctx;
217 if(sctx->derived_integ_key)
218 crypto_free_tfm(sctx->derived_integ_key);
219 if(sctx->derived_conf_key)
220 crypto_free_tfm(sctx->derived_conf_key);
221 if(sctx->share_key.data)
222 kfree(sctx->share_key.data);
223 if(sctx->mech_used.data)
224 kfree(sctx->mech_used.data);
225 kfree(sctx);
228 static u32
229 gss_verify_mic_spkm3(struct gss_ctx *ctx,
230 struct xdr_buf *signbuf,
231 struct xdr_netobj *checksum,
232 u32 *qstate) {
233 u32 maj_stat = 0;
234 int qop_state = 0;
235 struct spkm3_ctx *sctx = ctx->internal_ctx_id;
237 dprintk("RPC: gss_verify_mic_spkm3 calling spkm3_read_token\n");
238 maj_stat = spkm3_read_token(sctx, checksum, signbuf, &qop_state,
239 SPKM_MIC_TOK);
241 if (!maj_stat && qop_state)
242 *qstate = qop_state;
244 dprintk("RPC: gss_verify_mic_spkm3 returning %d\n", maj_stat);
245 return maj_stat;
248 static u32
249 gss_get_mic_spkm3(struct gss_ctx *ctx,
250 u32 qop,
251 struct xdr_buf *message_buffer,
252 struct xdr_netobj *message_token) {
253 u32 err = 0;
254 struct spkm3_ctx *sctx = ctx->internal_ctx_id;
256 dprintk("RPC: gss_get_mic_spkm3\n");
258 err = spkm3_make_token(sctx, qop, message_buffer,
259 message_token, SPKM_MIC_TOK);
260 return err;
263 static struct gss_api_ops gss_spkm3_ops = {
264 .gss_import_sec_context = gss_import_sec_context_spkm3,
265 .gss_get_mic = gss_get_mic_spkm3,
266 .gss_verify_mic = gss_verify_mic_spkm3,
267 .gss_delete_sec_context = gss_delete_sec_context_spkm3,
270 static struct pf_desc gss_spkm3_pfs[] = {
271 {RPC_AUTH_GSS_SPKM, 0, RPC_GSS_SVC_NONE, "spkm3"},
272 {RPC_AUTH_GSS_SPKMI, 0, RPC_GSS_SVC_INTEGRITY, "spkm3i"},
275 static struct gss_api_mech gss_spkm3_mech = {
276 .gm_name = "spkm3",
277 .gm_owner = THIS_MODULE,
278 .gm_ops = &gss_spkm3_ops,
279 .gm_pf_num = ARRAY_SIZE(gss_spkm3_pfs),
280 .gm_pfs = gss_spkm3_pfs,
283 static int __init init_spkm3_module(void)
285 int status;
287 status = gss_mech_register(&gss_spkm3_mech);
288 if (status)
289 printk("Failed to register spkm3 gss mechanism!\n");
290 return 0;
293 static void __exit cleanup_spkm3_module(void)
295 gss_mech_unregister(&gss_spkm3_mech);
298 MODULE_LICENSE("GPL");
299 module_init(init_spkm3_module);
300 module_exit(cleanup_spkm3_module);