Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 | /*
* linux/net/sunrpc/gss_spkm3_mech.c
*
* Copyright (c) 2003 The Regents of the University of Michigan.
* All rights reserved.
*
* Andy Adamson <andros@umich.edu>
* J. Bruce Fields <bfields@umich.edu>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/sunrpc/auth.h>
#include <linux/in.h>
#include <linux/sunrpc/svcauth_gss.h>
#include <linux/sunrpc/gss_spkm3.h>
#include <linux/sunrpc/xdr.h>
#include <linux/crypto.h>
#ifdef RPC_DEBUG
# define RPCDBG_FACILITY RPCDBG_AUTH
#endif
static const void *
simple_get_bytes(const void *p, const void *end, void *res, int len)
{
const void *q = (const void *)((const char *)p + len);
if (unlikely(q > end || q < p))
return ERR_PTR(-EFAULT);
memcpy(res, p, len);
return q;
}
static const void *
simple_get_netobj(const void *p, const void *end, struct xdr_netobj *res)
{
const void *q;
unsigned int len;
p = simple_get_bytes(p, end, &len, sizeof(len));
if (IS_ERR(p))
return p;
res->len = len;
if (len == 0) {
res->data = NULL;
return p;
}
q = (const void *)((const char *)p + len);
if (unlikely(q > end || q < p))
return ERR_PTR(-EFAULT);
res->data = kmalloc(len, GFP_KERNEL);
if (unlikely(res->data == NULL))
return ERR_PTR(-ENOMEM);
memcpy(res->data, p, len);
return q;
}
static inline const void *
get_key(const void *p, const void *end, struct crypto_tfm **res, int *resalg)
{
struct xdr_netobj key = { 0 };
int alg_mode,setkey = 0;
char *alg_name;
p = simple_get_bytes(p, end, resalg, sizeof(*resalg));
if (IS_ERR(p))
goto out_err;
p = simple_get_netobj(p, end, &key);
if (IS_ERR(p))
goto out_err;
switch (*resalg) {
case NID_des_cbc:
alg_name = "des";
alg_mode = CRYPTO_TFM_MODE_CBC;
setkey = 1;
break;
case NID_cast5_cbc:
/* XXXX here in name only, not used */
alg_name = "cast5";
alg_mode = CRYPTO_TFM_MODE_CBC;
setkey = 0; /* XXX will need to set to 1 */
break;
case NID_md5:
if (key.len == 0) {
dprintk("RPC: SPKM3 get_key: NID_md5 zero Key length\n");
}
alg_name = "md5";
alg_mode = 0;
setkey = 0;
break;
default:
dprintk("gss_spkm3_mech: unsupported algorithm %d\n", *resalg);
goto out_err_free_key;
}
if (!(*res = crypto_alloc_tfm(alg_name, alg_mode))) {
printk("gss_spkm3_mech: unable to initialize crypto algorthm %s\n", alg_name);
goto out_err_free_key;
}
if (setkey) {
if (crypto_cipher_setkey(*res, key.data, key.len)) {
printk("gss_spkm3_mech: error setting key for crypto algorthm %s\n", alg_name);
goto out_err_free_tfm;
}
}
if(key.len > 0)
kfree(key.data);
return p;
out_err_free_tfm:
crypto_free_tfm(*res);
out_err_free_key:
if(key.len > 0)
kfree(key.data);
p = ERR_PTR(-EINVAL);
out_err:
return p;
}
static int
gss_import_sec_context_spkm3(const void *p, size_t len,
struct gss_ctx *ctx_id)
{
const void *end = (const void *)((const char *)p + len);
struct spkm3_ctx *ctx;
if (!(ctx = kmalloc(sizeof(*ctx), GFP_KERNEL)))
goto out_err;
memset(ctx, 0, sizeof(*ctx));
p = simple_get_netobj(p, end, &ctx->ctx_id);
if (IS_ERR(p))
goto out_err_free_ctx;
p = simple_get_bytes(p, end, &ctx->qop, sizeof(ctx->qop));
if (IS_ERR(p))
goto out_err_free_ctx_id;
p = simple_get_netobj(p, end, &ctx->mech_used);
if (IS_ERR(p))
goto out_err_free_mech;
p = simple_get_bytes(p, end, &ctx->ret_flags, sizeof(ctx->ret_flags));
if (IS_ERR(p))
goto out_err_free_mech;
p = simple_get_bytes(p, end, &ctx->req_flags, sizeof(ctx->req_flags));
if (IS_ERR(p))
goto out_err_free_mech;
p = simple_get_netobj(p, end, &ctx->share_key);
if (IS_ERR(p))
goto out_err_free_s_key;
p = get_key(p, end, &ctx->derived_conf_key, &ctx->conf_alg);
if (IS_ERR(p))
goto out_err_free_s_key;
p = get_key(p, end, &ctx->derived_integ_key, &ctx->intg_alg);
if (IS_ERR(p))
goto out_err_free_key1;
p = simple_get_bytes(p, end, &ctx->keyestb_alg, sizeof(ctx->keyestb_alg));
if (IS_ERR(p))
goto out_err_free_key2;
p = simple_get_bytes(p, end, &ctx->owf_alg, sizeof(ctx->owf_alg));
if (IS_ERR(p))
goto out_err_free_key2;
if (p != end)
goto out_err_free_key2;
ctx_id->internal_ctx_id = ctx;
dprintk("Succesfully imported new spkm context.\n");
return 0;
out_err_free_key2:
crypto_free_tfm(ctx->derived_integ_key);
out_err_free_key1:
crypto_free_tfm(ctx->derived_conf_key);
out_err_free_s_key:
kfree(ctx->share_key.data);
out_err_free_mech:
kfree(ctx->mech_used.data);
out_err_free_ctx_id:
kfree(ctx->ctx_id.data);
out_err_free_ctx:
kfree(ctx);
out_err:
return PTR_ERR(p);
}
static void
gss_delete_sec_context_spkm3(void *internal_ctx) {
struct spkm3_ctx *sctx = internal_ctx;
crypto_free_tfm(sctx->derived_integ_key);
crypto_free_tfm(sctx->derived_conf_key);
kfree(sctx->share_key.data);
kfree(sctx->mech_used.data);
kfree(sctx);
}
static u32
gss_verify_mic_spkm3(struct gss_ctx *ctx,
struct xdr_buf *signbuf,
struct xdr_netobj *checksum)
{
u32 maj_stat = 0;
struct spkm3_ctx *sctx = ctx->internal_ctx_id;
dprintk("RPC: gss_verify_mic_spkm3 calling spkm3_read_token\n");
maj_stat = spkm3_read_token(sctx, checksum, signbuf, SPKM_MIC_TOK);
dprintk("RPC: gss_verify_mic_spkm3 returning %d\n", maj_stat);
return maj_stat;
}
static u32
gss_get_mic_spkm3(struct gss_ctx *ctx,
struct xdr_buf *message_buffer,
struct xdr_netobj *message_token)
{
u32 err = 0;
struct spkm3_ctx *sctx = ctx->internal_ctx_id;
dprintk("RPC: gss_get_mic_spkm3\n");
err = spkm3_make_token(sctx, message_buffer,
message_token, SPKM_MIC_TOK);
return err;
}
static struct gss_api_ops gss_spkm3_ops = {
.gss_import_sec_context = gss_import_sec_context_spkm3,
.gss_get_mic = gss_get_mic_spkm3,
.gss_verify_mic = gss_verify_mic_spkm3,
.gss_delete_sec_context = gss_delete_sec_context_spkm3,
};
static struct pf_desc gss_spkm3_pfs[] = {
{RPC_AUTH_GSS_SPKM, RPC_GSS_SVC_NONE, "spkm3"},
{RPC_AUTH_GSS_SPKMI, RPC_GSS_SVC_INTEGRITY, "spkm3i"},
};
static struct gss_api_mech gss_spkm3_mech = {
.gm_name = "spkm3",
.gm_owner = THIS_MODULE,
.gm_ops = &gss_spkm3_ops,
.gm_pf_num = ARRAY_SIZE(gss_spkm3_pfs),
.gm_pfs = gss_spkm3_pfs,
};
static int __init init_spkm3_module(void)
{
int status;
status = gss_mech_register(&gss_spkm3_mech);
if (status)
printk("Failed to register spkm3 gss mechanism!\n");
return 0;
}
static void __exit cleanup_spkm3_module(void)
{
gss_mech_unregister(&gss_spkm3_mech);
}
MODULE_LICENSE("GPL");
module_init(init_spkm3_module);
module_exit(cleanup_spkm3_module);
|