2 * linux/net/sunrpc/gss_krb5_mech.c
4 * Copyright (c) 2001 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_krb5.h>
45 #include <linux/sunrpc/xdr.h>
46 #include <linux/crypto.h>
49 # define RPCDBG_FACILITY RPCDBG_AUTH
52 struct xdr_netobj gss_mech_krb5_oid =
53 {9, "\052\206\110\206\367\022\001\002\002"};
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)))
78 if (!(res->data = kmalloc(res->len, GFP_KERNEL)))
80 memcpy(res->data, p, res->len);
86 get_key(char **p, char *end, struct crypto_tfm **res)
88 struct xdr_netobj key;
92 if (get_bytes(p, end, &alg, sizeof(alg)))
94 if ((get_netobj(p, end, &key)))
98 case ENCTYPE_DES_CBC_RAW:
100 alg_mode = CRYPTO_TFM_MODE_CBC;
103 dprintk("RPC: get_key: unsupported algorithm %d\n", alg);
104 goto out_err_free_key;
106 if (!(*res = crypto_alloc_tfm(alg_name, alg_mode)))
107 goto out_err_free_key;
108 if (crypto_cipher_setkey(*res, key.data, key.len))
109 goto out_err_free_tfm;
115 crypto_free_tfm(*res);
123 gss_import_sec_context_kerberos(struct xdr_netobj *inbuf,
124 struct gss_ctx *ctx_id)
126 char *p = inbuf->data;
127 char *end = inbuf->data + inbuf->len;
128 struct krb5_ctx *ctx;
130 if (!(ctx = kmalloc(sizeof(*ctx), GFP_KERNEL)))
132 memset(ctx, 0, sizeof(*ctx));
134 if (get_bytes(&p, end, &ctx->initiate, sizeof(ctx->initiate)))
135 goto out_err_free_ctx;
136 if (get_bytes(&p, end, &ctx->seed_init, sizeof(ctx->seed_init)))
137 goto out_err_free_ctx;
138 if (get_bytes(&p, end, ctx->seed, sizeof(ctx->seed)))
139 goto out_err_free_ctx;
140 if (get_bytes(&p, end, &ctx->signalg, sizeof(ctx->signalg)))
141 goto out_err_free_ctx;
142 if (get_bytes(&p, end, &ctx->sealalg, sizeof(ctx->sealalg)))
143 goto out_err_free_ctx;
144 if (get_bytes(&p, end, &ctx->endtime, sizeof(ctx->endtime)))
145 goto out_err_free_ctx;
146 if (get_bytes(&p, end, &ctx->seq_send, sizeof(ctx->seq_send)))
147 goto out_err_free_ctx;
148 if (get_netobj(&p, end, &ctx->mech_used))
149 goto out_err_free_ctx;
150 if (get_key(&p, end, &ctx->enc))
151 goto out_err_free_mech;
152 if (get_key(&p, end, &ctx->seq))
153 goto out_err_free_key1;
155 goto out_err_free_key2;
157 ctx_id->internal_ctx_id = ctx;
158 dprintk("Succesfully imported new context.\n");
162 crypto_free_tfm(ctx->seq);
164 crypto_free_tfm(ctx->enc);
166 kfree(ctx->mech_used.data);
170 return GSS_S_FAILURE;
174 gss_delete_sec_context_kerberos(void *internal_ctx) {
175 struct krb5_ctx *kctx = internal_ctx;
178 crypto_free_tfm(kctx->seq);
180 crypto_free_tfm(kctx->enc);
181 if (kctx->mech_used.data)
182 kfree(kctx->mech_used.data);
187 gss_verify_mic_kerberos(struct gss_ctx *ctx,
188 struct xdr_buf *message,
189 struct xdr_netobj *mic_token,
193 struct krb5_ctx *kctx = ctx->internal_ctx_id;
195 maj_stat = krb5_read_token(kctx, mic_token, message, &qop_state,
197 if (!maj_stat && qop_state)
200 dprintk("RPC: gss_verify_mic_kerberos returning %d\n", maj_stat);
205 gss_get_mic_kerberos(struct gss_ctx *ctx,
207 struct xdr_buf *message,
208 struct xdr_netobj *mic_token) {
210 struct krb5_ctx *kctx = ctx->internal_ctx_id;
212 err = krb5_make_token(kctx, qop, message, mic_token, KG_TOK_MIC_MSG);
214 dprintk("RPC: gss_get_mic_kerberos returning %d\n",err);
219 static struct gss_api_ops gss_kerberos_ops = {
221 .gss_import_sec_context = gss_import_sec_context_kerberos,
222 .gss_get_mic = gss_get_mic_kerberos,
223 .gss_verify_mic = gss_verify_mic_kerberos,
224 .gss_delete_sec_context = gss_delete_sec_context_kerberos,
227 /* XXX error checking? reference counting? */
228 static int __init init_kerberos_module(void)
230 struct gss_api_mech *gm;
232 if (gss_mech_register(&gss_mech_krb5_oid, &gss_kerberos_ops))
233 printk("Failed to register kerberos gss mechanism!\n");
234 gm = gss_mech_get_by_OID(&gss_mech_krb5_oid);
235 gss_register_triple(RPC_AUTH_GSS_KRB5 , gm, 0, RPC_GSS_SVC_NONE);
236 gss_register_triple(RPC_AUTH_GSS_KRB5I, gm, 0, RPC_GSS_SVC_INTEGRITY);
237 if (svcauth_gss_register_pseudoflavor(RPC_AUTH_GSS_KRB5, "krb5"))
238 printk("Failed to register %s with server!\n", "krb5");
239 if (svcauth_gss_register_pseudoflavor(RPC_AUTH_GSS_KRB5I, "krb5i"))
240 printk("Failed to register %s with server!\n", "krb5i");
245 static void __exit cleanup_kerberos_module(void)
247 gss_unregister_triple(RPC_AUTH_GSS_KRB5I);
248 gss_unregister_triple(RPC_AUTH_GSS_KRB5);
251 MODULE_LICENSE("GPL");
252 module_init(init_kerberos_module);
253 module_exit(cleanup_kerberos_module);