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/gss_krb5.h>
44 #include <linux/sunrpc/xdr.h>
45 #include <linux/crypto.h>
48 # define RPCDBG_FACILITY RPCDBG_AUTH
51 struct xdr_netobj gss_mech_krb5_oid =
52 {9, "\052\206\110\206\367\022\001\002\002"};
55 get_bytes(char **ptr, const char *end, void *res, int len)
68 get_netobj(char **ptr, const char *end, struct xdr_netobj *res)
72 if (get_bytes(&p, end, &res->len, sizeof(res->len)))
77 if (!(res->data = kmalloc(res->len, GFP_KERNEL)))
79 memcpy(res->data, p, res->len);
85 get_key(char **p, char *end, struct crypto_tfm **res)
87 struct xdr_netobj key;
91 if (get_bytes(p, end, &alg, sizeof(alg)))
93 if ((get_netobj(p, end, &key)))
97 case ENCTYPE_DES_CBC_RAW:
99 alg_mode = CRYPTO_TFM_MODE_CBC;
102 dprintk("RPC: get_key: unsupported algorithm %d\n", alg);
103 goto out_err_free_key;
105 if (!(*res = crypto_alloc_tfm(alg_name, alg_mode)))
106 goto out_err_free_key;
107 if (crypto_cipher_setkey(*res, key.data, key.len))
108 goto out_err_free_tfm;
114 crypto_free_tfm(*res);
122 gss_import_sec_context_kerberos(struct xdr_netobj *inbuf,
123 struct gss_ctx *ctx_id)
125 char *p = inbuf->data;
126 char *end = inbuf->data + inbuf->len;
127 struct krb5_ctx *ctx;
129 if (!(ctx = kmalloc(sizeof(*ctx), GFP_KERNEL)))
131 memset(ctx, 0, sizeof(*ctx));
133 if (get_bytes(&p, end, &ctx->initiate, sizeof(ctx->initiate)))
134 goto out_err_free_ctx;
135 if (get_bytes(&p, end, &ctx->seed_init, sizeof(ctx->seed_init)))
136 goto out_err_free_ctx;
137 if (get_bytes(&p, end, ctx->seed, sizeof(ctx->seed)))
138 goto out_err_free_ctx;
139 if (get_bytes(&p, end, &ctx->signalg, sizeof(ctx->signalg)))
140 goto out_err_free_ctx;
141 if (get_bytes(&p, end, &ctx->sealalg, sizeof(ctx->sealalg)))
142 goto out_err_free_ctx;
143 if (get_bytes(&p, end, &ctx->endtime, sizeof(ctx->endtime)))
144 goto out_err_free_ctx;
145 if (get_bytes(&p, end, &ctx->seq_send, sizeof(ctx->seq_send)))
146 goto out_err_free_ctx;
147 if (get_netobj(&p, end, &ctx->mech_used))
148 goto out_err_free_ctx;
149 if (get_key(&p, end, &ctx->enc))
150 goto out_err_free_mech;
151 if (get_key(&p, end, &ctx->seq))
152 goto out_err_free_key1;
154 goto out_err_free_key2;
156 ctx_id->internal_ctx_id = ctx;
157 dprintk("RPC: Succesfully imported new context.\n");
161 crypto_free_tfm(ctx->seq);
163 crypto_free_tfm(ctx->enc);
165 kfree(ctx->mech_used.data);
169 return GSS_S_FAILURE;
173 gss_delete_sec_context_kerberos(void *internal_ctx) {
174 struct krb5_ctx *kctx = internal_ctx;
177 crypto_free_tfm(kctx->seq);
179 crypto_free_tfm(kctx->enc);
180 if (kctx->mech_used.data)
181 kfree(kctx->mech_used.data);
186 gss_verify_mic_kerberos(struct gss_ctx *ctx,
187 struct xdr_buf *message,
188 struct xdr_netobj *mic_token,
192 struct krb5_ctx *kctx = ctx->internal_ctx_id;
194 maj_stat = krb5_read_token(kctx, mic_token, message, &qop_state,
196 if (!maj_stat && qop_state)
199 dprintk("RPC: gss_verify_mic_kerberos returning %d\n", maj_stat);
204 gss_get_mic_kerberos(struct gss_ctx *ctx,
206 struct xdr_buf *message,
207 struct xdr_netobj *mic_token) {
209 struct krb5_ctx *kctx = ctx->internal_ctx_id;
211 err = krb5_make_token(kctx, qop, message, mic_token, KG_TOK_MIC_MSG);
213 dprintk("RPC: gss_get_mic_kerberos returning %d\n",err);
218 static struct gss_api_ops gss_kerberos_ops = {
219 .gss_import_sec_context = gss_import_sec_context_kerberos,
220 .gss_get_mic = gss_get_mic_kerberos,
221 .gss_verify_mic = gss_verify_mic_kerberos,
222 .gss_delete_sec_context = gss_delete_sec_context_kerberos,
225 static struct pf_desc gss_kerberos_pfs[] = {
227 .pseudoflavor = RPC_AUTH_GSS_KRB5,
228 .service = RPC_GSS_SVC_NONE,
232 .pseudoflavor = RPC_AUTH_GSS_KRB5I,
233 .service = RPC_GSS_SVC_INTEGRITY,
238 static struct gss_api_mech gss_kerberos_mech = {
240 .gm_owner = THIS_MODULE,
241 .gm_ops = &gss_kerberos_ops,
242 .gm_pf_num = ARRAY_SIZE(gss_kerberos_pfs),
243 .gm_pfs = gss_kerberos_pfs,
246 static int __init init_kerberos_module(void)
250 status = gss_mech_register(&gss_kerberos_mech);
252 printk("Failed to register kerberos gss mechanism!\n");
256 static void __exit cleanup_kerberos_module(void)
258 gss_mech_unregister(&gss_kerberos_mech);
261 MODULE_LICENSE("GPL");
262 module_init(init_kerberos_module);
263 module_exit(cleanup_kerberos_module);