2 Copyright (c) 2004 The Regents of the University of Michigan.
5 Redistribution and use in source and binary forms, with or without
6 modification, are permitted provided that the following conditions
9 1. Redistributions of source code must retain the above copyright
10 notice, this list of conditions and the following disclaimer.
11 2. Redistributions in binary form must reproduce the above copyright
12 notice, this list of conditions and the following disclaimer in the
13 documentation and/or other materials provided with the distribution.
14 3. Neither the name of the University nor the names of its
15 contributors may be used to endorse or promote products derived
16 from this software without specific prior written permission.
18 THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
19 WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
20 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
21 DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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27 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
28 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 #ifndef HAVE_LUCID_CONTEXT_SUPPORT
39 #include <gssapi/gssapi.h>
41 #include <rpc/auth_gss.h>
49 #if (KRB5_VERSION > 131)
50 /* XXX argggg, there's gotta be a better way than just duplicating this
51 * whole struct. Unfortunately, this is in a "private" header file,
52 * so this is our best choice at this point :-/
54 * XXX Does this match the Heimdal definition? */
56 typedef struct _krb5_gss_ctx_id_rec {
57 unsigned int initiate : 1; /* nonzero if initiating, zero if accepting */
58 unsigned int established : 1;
59 unsigned int big_endian : 1;
60 unsigned int have_acceptor_subkey : 1;
61 unsigned int seed_init : 1; /* XXX tested but never actually set */
63 unsigned int testing_unknown_tokid : 1; /* for testing only */
66 unsigned char seed[16];
69 krb5_keyblock *subkey;
75 krb5_timestamp endtime;
77 /* XXX these used to be signed. the old spec is inspecific, and
78 the new spec specifies unsigned. I don't believe that the change
79 affects the wire encoding. */
80 uint64_t seq_send; /* gssint_uint64 */
81 uint64_t seq_recv; /* gssint_uint64 */
83 krb5_auth_context auth_context;
84 gss_OID_desc *mech_used; /* gss_OID_desc */
85 /* Protocol spec revision
86 0 => RFC 1964 with 3DES and RC4 enhancements
87 1 => draft-ietf-krb-wg-gssapi-cfx-01
88 No others defined so far. */
90 krb5_cksumtype cksumtype; /* for "main" subkey */
91 krb5_keyblock *acceptor_subkey; /* CFX only */
92 krb5_cksumtype acceptor_subkey_cksumtype;
94 gss_buffer_desc init_token;
96 } krb5_gss_ctx_id_rec, *krb5_gss_ctx_id_t;
98 #else /* KRB5_VERSION > 131 */
100 typedef struct _krb5_gss_ctx_id_rec {
104 unsigned char seed[16];
106 krb5_principal there;
107 krb5_keyblock *subkey;
113 krb5_timestamp endtime;
114 krb5_flags krb_flags;
120 krb5_auth_context auth_context;
121 gss_OID_desc *mech_used;
123 krb5_cksumtype *ctypes;
124 } krb5_gss_ctx_id_rec, *krb5_gss_ctx_id_t;
126 #endif /* KRB5_VERSION */
130 write_keyblock(char **p, char *end, struct _krb5_keyblock *arg)
134 if (WRITE_BYTES(p, end, arg->enctype)) return -1;
135 tmp.length = arg->length;
136 tmp.value = arg->contents;
137 if (write_buffer(p, end, &tmp)) return -1;
142 * We really shouldn't know about glue-layer context structure, but
143 * we need to get at the real krb5 context pointer. This should be
144 * removed as soon as we say there is no support for MIT Kerberos
145 * prior to 1.4 -- which gives us "legal" access to the context info.
147 typedef struct gss_union_ctx_id_t {
149 gss_ctx_id_t internal_ctx_id;
150 } gss_union_ctx_id_desc, *gss_union_ctx_id_t;
153 serialize_krb5_ctx(gss_ctx_id_t ctx, gss_buffer_desc *buf)
155 krb5_gss_ctx_id_t kctx = ((gss_union_ctx_id_t)ctx)->internal_ctx_id;
157 static int constant_one = 1;
158 static int constant_zero = 0;
159 uint32_t word_seq_send;
161 if (!(buf->value = calloc(1, MAX_CTX_LEN)))
164 end = buf->value + MAX_CTX_LEN;
166 if (kctx->initiate) {
167 if (WRITE_BYTES(&p, end, constant_one)) goto out_err;
170 if (WRITE_BYTES(&p, end, constant_zero)) goto out_err;
172 if (kctx->seed_init) {
173 if (WRITE_BYTES(&p, end, constant_one)) goto out_err;
176 if (WRITE_BYTES(&p, end, constant_zero)) goto out_err;
178 if (write_bytes(&p, end, &kctx->seed, sizeof(kctx->seed)))
180 if (WRITE_BYTES(&p, end, kctx->signalg)) goto out_err;
181 if (WRITE_BYTES(&p, end, kctx->sealalg)) goto out_err;
182 if (WRITE_BYTES(&p, end, kctx->endtime)) goto out_err;
183 word_seq_send = kctx->seq_send;
184 if (WRITE_BYTES(&p, end, word_seq_send)) goto out_err;
185 if (write_oid(&p, end, kctx->mech_used)) goto out_err;
187 printerr(2, "serialize_krb5_ctx: serializing keys with "
188 "enctype %d and length %d\n",
189 kctx->enc->enctype, kctx->enc->length);
191 if (write_keyblock(&p, end, kctx->enc)) goto out_err;
192 if (write_keyblock(&p, end, kctx->seq)) goto out_err;
194 buf->length = p - (char *)buf->value;
197 printerr(0, "ERROR: failed serializing krb5 context for kernel\n");
198 if (buf->value) free(buf->value);
203 #endif /* HAVE_KRB5 */
204 #endif /* HAVE_LUCID_CONTEXT_SUPPORT */