File: kadm_rpc_svc.c

package info (click to toggle)
krb5 1.10.1%2Bdfsg-5%2Bdeb7u7
  • links: PTS, VCS
  • area: main
  • in suites: wheezy
  • size: 52,276 kB
  • sloc: ansic: 320,776; cpp: 14,806; exp: 13,981; makefile: 7,777; sh: 6,418; python: 4,491; perl: 3,940; objc: 3,042; yacc: 1,187; awk: 396; xml: 368; asm: 248; csh: 147; lisp: 104; sed: 62
file content (345 lines) | stat: -rw-r--r-- 9,198 bytes parent folder | download
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
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
/* -*- mode: c; c-file-style: "bsd"; indent-tabs-mode: t -*- */
/*
 * Copyright 1993 OpenVision Technologies, Inc., All Rights Reserved.
 *
 */

#include <k5-int.h>
#include <gssrpc/rpc.h>
#include <gssapi/gssapi_krb5.h> /* for gss_nt_krb5_name */
#include <syslog.h>
#include <kadm5/kadm_rpc.h>
#include <krb5.h>
#include <kadm5/admin.h>
#include <adm_proto.h>
#ifdef HAVE_ARPA_INET_H
#include <arpa/inet.h>
#endif
#include "misc.h"
#include "kadm5/server_internal.h"

extern void *global_server_handle;

static int check_rpcsec_auth(struct svc_req *);

/*
 * Function: kadm_1
 *
 * Purpose: RPC proccessing procedure.
 *	    originally generated from rpcgen
 *
 * Arguments:
 *	rqstp		    (input) rpc request structure
 *	transp		    (input) rpc transport structure
 *	(input/output)
 *	<return value>
 *
 * Requires:
 * Effects:
 * Modifies:
 */

void kadm_1(rqstp, transp)
   struct svc_req *rqstp;
   register SVCXPRT *transp;
{
     union {
	  cprinc_arg create_principal_2_arg;
	  dprinc_arg delete_principal_2_arg;
	  mprinc_arg modify_principal_2_arg;
	  rprinc_arg rename_principal_2_arg;
	  gprinc_arg get_principal_2_arg;
	  chpass_arg chpass_principal_2_arg;
	  chrand_arg chrand_principal_2_arg;
	  cpol_arg create_policy_2_arg;
	  dpol_arg delete_policy_2_arg;
	  mpol_arg modify_policy_2_arg;
	  gpol_arg get_policy_2_arg;
	  setkey_arg setkey_principal_2_arg;
	  setv4key_arg setv4key_principal_2_arg;
	  cprinc3_arg create_principal3_2_arg;
	  chpass3_arg chpass_principal3_2_arg;
	  chrand3_arg chrand_principal3_2_arg;
	  setkey3_arg setkey_principal3_2_arg;
     } argument;
     char *result;
     bool_t (*xdr_argument)(), (*xdr_result)();
     char *(*local)();

     if (rqstp->rq_cred.oa_flavor != AUTH_GSSAPI &&
	 !check_rpcsec_auth(rqstp)) {
	  krb5_klog_syslog(LOG_ERR, "Authentication attempt failed: %s, "
		 "RPC authentication flavor %d",
		 inet_ntoa(rqstp->rq_xprt->xp_raddr.sin_addr),
		 rqstp->rq_cred.oa_flavor);
	  svcerr_weakauth(transp);
	  return;
     }

     switch (rqstp->rq_proc) {
     case NULLPROC:
	  (void) svc_sendreply(transp, xdr_void, (char *)NULL);
	  return;

     case CREATE_PRINCIPAL:
	  xdr_argument = xdr_cprinc_arg;
	  xdr_result = xdr_generic_ret;
	  local = (char *(*)()) create_principal_2_svc;
	  break;

     case DELETE_PRINCIPAL:
	  xdr_argument = xdr_dprinc_arg;
	  xdr_result = xdr_generic_ret;
	  local = (char *(*)()) delete_principal_2_svc;
	  break;

     case MODIFY_PRINCIPAL:
	  xdr_argument = xdr_mprinc_arg;
	  xdr_result = xdr_generic_ret;
	  local = (char *(*)()) modify_principal_2_svc;
	  break;

     case RENAME_PRINCIPAL:
	  xdr_argument = xdr_rprinc_arg;
	  xdr_result = xdr_generic_ret;
	  local = (char *(*)()) rename_principal_2_svc;
	  break;

     case GET_PRINCIPAL:
	  xdr_argument = xdr_gprinc_arg;
	  xdr_result = xdr_gprinc_ret;
	  local = (char *(*)()) get_principal_2_svc;
	  break;

     case GET_PRINCS:
	  xdr_argument = xdr_gprincs_arg;
	  xdr_result = xdr_gprincs_ret;
	  local = (char *(*)()) get_princs_2_svc;
	  break;

     case CHPASS_PRINCIPAL:
	  xdr_argument = xdr_chpass_arg;
	  xdr_result = xdr_generic_ret;
	  local = (char *(*)()) chpass_principal_2_svc;
	  break;

     case SETV4KEY_PRINCIPAL:
	  xdr_argument = xdr_setv4key_arg;
	  xdr_result = xdr_generic_ret;
	  local = (char *(*)()) setv4key_principal_2_svc;
	  break;

     case SETKEY_PRINCIPAL:
	  xdr_argument = xdr_setkey_arg;
	  xdr_result = xdr_generic_ret;
	  local = (char *(*)()) setkey_principal_2_svc;
	  break;

     case CHRAND_PRINCIPAL:
	  xdr_argument = xdr_chrand_arg;
	  xdr_result = xdr_chrand_ret;
	  local = (char *(*)()) chrand_principal_2_svc;
	  break;

     case CREATE_POLICY:
	  xdr_argument = xdr_cpol_arg;
	  xdr_result = xdr_generic_ret;
	  local = (char *(*)()) create_policy_2_svc;
	  break;

     case DELETE_POLICY:
	  xdr_argument = xdr_dpol_arg;
	  xdr_result = xdr_generic_ret;
	  local = (char *(*)()) delete_policy_2_svc;
	  break;

     case MODIFY_POLICY:
	  xdr_argument = xdr_mpol_arg;
	  xdr_result = xdr_generic_ret;
	  local = (char *(*)()) modify_policy_2_svc;
	  break;

     case GET_POLICY:
	  xdr_argument = xdr_gpol_arg;
	  xdr_result = xdr_gpol_ret;
	  local = (char *(*)()) get_policy_2_svc;
	  break;

     case GET_POLS:
	  xdr_argument = xdr_gpols_arg;
	  xdr_result = xdr_gpols_ret;
	  local = (char *(*)()) get_pols_2_svc;
	  break;

     case GET_PRIVS:
	  xdr_argument = xdr_u_int32;
	  xdr_result = xdr_getprivs_ret;
	  local = (char *(*)()) get_privs_2_svc;
	  break;

     case INIT:
	  xdr_argument = xdr_u_int32;
	  xdr_result = xdr_generic_ret;
	  local = (char *(*)()) init_2_svc;
	  break;

     case CREATE_PRINCIPAL3:
	  xdr_argument = xdr_cprinc3_arg;
	  xdr_result = xdr_generic_ret;
	  local = (char *(*)()) create_principal3_2_svc;
	  break;

     case CHPASS_PRINCIPAL3:
	  xdr_argument = xdr_chpass3_arg;
	  xdr_result = xdr_generic_ret;
	  local = (char *(*)()) chpass_principal3_2_svc;
	  break;

     case CHRAND_PRINCIPAL3:
	  xdr_argument = xdr_chrand3_arg;
	  xdr_result = xdr_chrand_ret;
	  local = (char *(*)()) chrand_principal3_2_svc;
	  break;

     case SETKEY_PRINCIPAL3:
	  xdr_argument = xdr_setkey3_arg;
	  xdr_result = xdr_generic_ret;
	  local = (char *(*)()) setkey_principal3_2_svc;
	  break;

     case PURGEKEYS:
	  xdr_argument = xdr_purgekeys_arg;
	  xdr_result = xdr_generic_ret;
	  local = (char *(*)()) purgekeys_2_svc;
	  break;

     case GET_STRINGS:
	  xdr_argument = xdr_gstrings_arg;
	  xdr_result = xdr_gstrings_ret;
	  local = (char *(*)()) get_strings_2_svc;
	  break;

     case SET_STRING:
	  xdr_argument = xdr_sstring_arg;
	  xdr_result = xdr_generic_ret;
	  local = (char *(*)()) set_string_2_svc;
	  break;

     default:
	  krb5_klog_syslog(LOG_ERR, "Invalid KADM5 procedure number: %s, %d",
		 inet_ntoa(rqstp->rq_xprt->xp_raddr.sin_addr),
		 rqstp->rq_proc);
	  svcerr_noproc(transp);
	  return;
     }
     memset(&argument, 0, sizeof(argument));
     if (!svc_getargs(transp, xdr_argument, &argument)) {
	  svcerr_decode(transp);
	  return;
     }
     result = (*local)(&argument, rqstp);
     if (result != NULL && !svc_sendreply(transp, xdr_result, result)) {
	  krb5_klog_syslog(LOG_ERR, "WARNING! Unable to send function results, "
		 "continuing.");
	  svcerr_systemerr(transp);
     }
     if (!svc_freeargs(transp, xdr_argument, &argument)) {
	  krb5_klog_syslog(LOG_ERR, "WARNING! Unable to free arguments, "
		 "continuing.");
     }
     return;
}

static int
check_rpcsec_auth(struct svc_req *rqstp)
{
     gss_ctx_id_t ctx;
     krb5_context kctx;
     OM_uint32 maj_stat, min_stat;
     gss_name_t name;
     krb5_principal princ;
     int ret, success;
     krb5_data *c1, *c2, *realm;
     gss_buffer_desc gss_str;
     kadm5_server_handle_t handle;
     size_t slen;
     char *sdots;

     success = 0;
     handle = (kadm5_server_handle_t)global_server_handle;

     if (rqstp->rq_cred.oa_flavor != RPCSEC_GSS)
	  return 0;

     ctx = rqstp->rq_svccred;

     maj_stat = gss_inquire_context(&min_stat, ctx, NULL, &name,
				    NULL, NULL, NULL, NULL, NULL);
     if (maj_stat != GSS_S_COMPLETE) {
	  krb5_klog_syslog(LOG_ERR, _("check_rpcsec_auth: failed "
				      "inquire_context, stat=%u"), maj_stat);
	  log_badauth(maj_stat, min_stat,
		      &rqstp->rq_xprt->xp_raddr, NULL);
	  goto fail_name;
     }

     kctx = handle->context;
     ret = gss_to_krb5_name_1(rqstp, kctx, name, &princ, &gss_str);
     if (ret == 0)
	  goto fail_name;

     slen = gss_str.length;
     trunc_name(&slen, &sdots);
     /*
      * Since we accept with GSS_C_NO_NAME, the client can authenticate
      * against the entire kdb.  Therefore, ensure that the service
      * name is something reasonable.
      */
     if (krb5_princ_size(kctx, princ) != 2)
	  goto fail_princ;

     c1 = krb5_princ_component(kctx, princ, 0);
     c2 = krb5_princ_component(kctx, princ, 1);
     realm = krb5_princ_realm(kctx, princ);
     success = data_eq_string(*realm, handle->params.realm) &&
	     data_eq_string(*c1, "kadmin") && !data_eq_string(*c2, "history");

fail_princ:
     if (!success) {
	 krb5_klog_syslog(LOG_ERR, _("bad service principal %.*s%s"),
			  (int) slen, (char *) gss_str.value, sdots);
     }
     gss_release_buffer(&min_stat, &gss_str);
     krb5_free_principal(kctx, princ);
fail_name:
     gss_release_name(&min_stat, &name);
     return success;
}

int
gss_to_krb5_name_1(struct svc_req *rqstp, krb5_context ctx, gss_name_t gss_name,
		   krb5_principal *princ, gss_buffer_t gss_str)
{
     OM_uint32 status, minor_stat;
     gss_OID gss_type;
     char *str;
     int success;

     status = gss_display_name(&minor_stat, gss_name, gss_str, &gss_type);
     if ((status != GSS_S_COMPLETE) || (gss_type != gss_nt_krb5_name)) {
	  krb5_klog_syslog(LOG_ERR, _("gss_to_krb5_name: failed display_name "
				      "status %d"), status);
	  log_badauth(status, minor_stat,
		      &rqstp->rq_xprt->xp_raddr, NULL);
	  return 0;
     }
     str = malloc(gss_str->length +1);
     if (str == NULL)
	  return 0;
     *str = '\0';

     strncat(str, gss_str->value, gss_str->length);
     success = (krb5_parse_name(ctx, str, princ) == 0);
     free(str);
     return success;
}