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etc/services - sync with NetBSD-8
[minix.git] / crypto / external / bsd / openssl / dist / ssl / kssl.c
blobcf585679dcccfe06e9e5b7a28c773d1fdf575c14
1 /* ssl/kssl.c -*- mode: C; c-file-style: "eay" -*- */
2 /*
3 * Written by Vern Staats <staatsvr@asc.hpc.mil> for the OpenSSL project
4 * 2000.
5 */
6 /* ====================================================================
7 * Copyright (c) 2000 The OpenSSL Project. All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 *
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 *
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in
18 * the documentation and/or other materials provided with the
19 * distribution.
20 *
21 * 3. All advertising materials mentioning features or use of this
22 * software must display the following acknowledgment:
23 * "This product includes software developed by the OpenSSL Project
24 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
25 *
26 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
27 * endorse or promote products derived from this software without
28 * prior written permission. For written permission, please contact
29 * licensing@OpenSSL.org.
30 *
31 * 5. Products derived from this software may not be called "OpenSSL"
32 * nor may "OpenSSL" appear in their names without prior written
33 * permission of the OpenSSL Project.
34 *
35 * 6. Redistributions of any form whatsoever must retain the following
36 * acknowledgment:
37 * "This product includes software developed by the OpenSSL Project
38 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
39 *
40 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
41 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
43 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
44 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
45 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
46 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
47 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
49 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
50 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
51 * OF THE POSSIBILITY OF SUCH DAMAGE.
52 * ====================================================================
53 *
54 * This product includes cryptographic software written by Eric Young
55 * (eay@cryptsoft.com). This product includes software written by Tim
56 * Hudson (tjh@cryptsoft.com).
57 *
58 */
59
60 /*-
61 * ssl/kssl.c -- Routines to support (& debug) Kerberos5 auth for openssl
62 *
63 * 19990701 VRS Started.
64 * 200011?? Jeffrey Altman, Richard Levitte
65 * Generalized for Heimdal, Newer MIT, & Win32.
66 * Integrated into main OpenSSL 0.9.7 snapshots.
67 * 20010413 Simon Wilkinson, VRS
68 * Real RFC2712 KerberosWrapper replaces AP_REQ.
69 */
70
71 #include <openssl/opensslconf.h>
72
73 #include <string.h>
74
75 #define KRB5_PRIVATE 1
76
77 #include <openssl/ssl.h>
78 #include <openssl/evp.h>
79 #include <openssl/objects.h>
80 #include <openssl/krb5_asn.h>
81 #include "kssl_lcl.h"
82
83 #ifndef OPENSSL_NO_KRB5
84
85 # ifndef ENOMEM
86 # define ENOMEM KRB5KRB_ERR_GENERIC
87 # endif
88
89 /*
90 * When OpenSSL is built on Windows, we do not want to require that
91 * the Kerberos DLLs be available in order for the OpenSSL DLLs to
92 * work. Therefore, all Kerberos routines are loaded at run time
93 * and we do not link to a .LIB file.
94 */
95
96 # if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_WIN32)
97 /*
98 * The purpose of the following pre-processor statements is to provide
99 * compatibility with different releases of MIT Kerberos for Windows.
100 * All versions up to 1.2 used macros. But macros do not allow for
101 * a binary compatible interface for DLLs. Therefore, all macros are
102 * being replaced by function calls. The following code will allow
103 * an OpenSSL DLL built on Windows to work whether or not the macro
104 * or function form of the routines are utilized.
105 */
106 # ifdef krb5_cc_get_principal
107 # define NO_DEF_KRB5_CCACHE
108 # undef krb5_cc_get_principal
109 # endif
110 # define krb5_cc_get_principal kssl_krb5_cc_get_principal
111
112 # define krb5_free_data_contents kssl_krb5_free_data_contents
113 # define krb5_free_context kssl_krb5_free_context
114 # define krb5_auth_con_free kssl_krb5_auth_con_free
115 # define krb5_free_principal kssl_krb5_free_principal
116 # define krb5_mk_req_extended kssl_krb5_mk_req_extended
117 # define krb5_get_credentials kssl_krb5_get_credentials
118 # define krb5_cc_default kssl_krb5_cc_default
119 # define krb5_sname_to_principal kssl_krb5_sname_to_principal
120 # define krb5_init_context kssl_krb5_init_context
121 # define krb5_free_ticket kssl_krb5_free_ticket
122 # define krb5_rd_req kssl_krb5_rd_req
123 # define krb5_kt_default kssl_krb5_kt_default
124 # define krb5_kt_resolve kssl_krb5_kt_resolve
125 /* macros in mit 1.2.2 and earlier; functions in mit 1.2.3 and greater */
126 # ifndef krb5_kt_close
127 # define krb5_kt_close kssl_krb5_kt_close
128 # endif /* krb5_kt_close */
129 # ifndef krb5_kt_get_entry
130 # define krb5_kt_get_entry kssl_krb5_kt_get_entry
131 # endif /* krb5_kt_get_entry */
132 # define krb5_auth_con_init kssl_krb5_auth_con_init
133
134 # define krb5_principal_compare kssl_krb5_principal_compare
135 # define krb5_decrypt_tkt_part kssl_krb5_decrypt_tkt_part
136 # define krb5_timeofday kssl_krb5_timeofday
137 # define krb5_rc_default kssl_krb5_rc_default
138
139 # ifdef krb5_rc_initialize
140 # undef krb5_rc_initialize
141 # endif
142 # define krb5_rc_initialize kssl_krb5_rc_initialize
143
144 # ifdef krb5_rc_get_lifespan
145 # undef krb5_rc_get_lifespan
146 # endif
147 # define krb5_rc_get_lifespan kssl_krb5_rc_get_lifespan
148
149 # ifdef krb5_rc_destroy
150 # undef krb5_rc_destroy
151 # endif
152 # define krb5_rc_destroy kssl_krb5_rc_destroy
153
154 # define valid_cksumtype kssl_valid_cksumtype
155 # define krb5_checksum_size kssl_krb5_checksum_size
156 # define krb5_kt_free_entry kssl_krb5_kt_free_entry
157 # define krb5_auth_con_setrcache kssl_krb5_auth_con_setrcache
158 # define krb5_auth_con_getrcache kssl_krb5_auth_con_getrcache
159 # define krb5_get_server_rcache kssl_krb5_get_server_rcache
160
161 /* Prototypes for built in stubs */
162 void kssl_krb5_free_data_contents(krb5_context, krb5_data *);
163 void kssl_krb5_free_principal(krb5_context, krb5_principal);
164 krb5_error_code kssl_krb5_kt_resolve(krb5_context,
165 krb5_const char *, krb5_keytab *);
166 krb5_error_code kssl_krb5_kt_default(krb5_context, krb5_keytab *);
167 krb5_error_code kssl_krb5_free_ticket(krb5_context, krb5_ticket *);
168 krb5_error_code kssl_krb5_rd_req(krb5_context, krb5_auth_context *,
169 krb5_const krb5_data *,
170 krb5_const_principal, krb5_keytab,
171 krb5_flags *, krb5_ticket **);
172
173 krb5_boolean kssl_krb5_principal_compare(krb5_context, krb5_const_principal,
174 krb5_const_principal);
175 krb5_error_code kssl_krb5_mk_req_extended(krb5_context,
176 krb5_auth_context *,
177 krb5_const krb5_flags,
178 krb5_data *,
179 krb5_creds *, krb5_data *);
180 krb5_error_code kssl_krb5_init_context(krb5_context *);
181 void kssl_krb5_free_context(krb5_context);
182 krb5_error_code kssl_krb5_cc_default(krb5_context, krb5_ccache *);
183 krb5_error_code kssl_krb5_sname_to_principal(krb5_context,
184 krb5_const char *,
185 krb5_const char *,
186 krb5_int32, krb5_principal *);
187 krb5_error_code kssl_krb5_get_credentials(krb5_context,
188 krb5_const krb5_flags,
189 krb5_ccache,
190 krb5_creds *, krb5_creds * *);
191 krb5_error_code kssl_krb5_auth_con_init(krb5_context, krb5_auth_context *);
192 krb5_error_code kssl_krb5_cc_get_principal(krb5_context context,
193 krb5_ccache cache,
194 krb5_principal *principal);
195 krb5_error_code kssl_krb5_auth_con_free(krb5_context, krb5_auth_context);
196 size_t kssl_krb5_checksum_size(krb5_context context, krb5_cksumtype ctype);
197 krb5_boolean kssl_valid_cksumtype(krb5_cksumtype ctype);
198 krb5_error_code krb5_kt_free_entry(krb5_context, krb5_keytab_entry FAR *);
199 krb5_error_code kssl_krb5_auth_con_setrcache(krb5_context,
200 krb5_auth_context, krb5_rcache);
201 krb5_error_code kssl_krb5_get_server_rcache(krb5_context,
202 krb5_const krb5_data *,
203 krb5_rcache *);
204 krb5_error_code kssl_krb5_auth_con_getrcache(krb5_context,
205 krb5_auth_context,
206 krb5_rcache *);
207
208 /* Function pointers (almost all Kerberos functions are _stdcall) */
209 static void (_stdcall *p_krb5_free_data_contents) (krb5_context, krb5_data *)
210 = NULL;
211 static void (_stdcall *p_krb5_free_principal) (krb5_context, krb5_principal)
212 = NULL;
213 static krb5_error_code(_stdcall *p_krb5_kt_resolve)
214 (krb5_context, krb5_const char *, krb5_keytab *) = NULL;
215 static krb5_error_code(_stdcall *p_krb5_kt_default) (krb5_context,
216 krb5_keytab *) = NULL;
217 static krb5_error_code(_stdcall *p_krb5_free_ticket) (krb5_context,
218 krb5_ticket *) = NULL;
219 static krb5_error_code(_stdcall *p_krb5_rd_req) (krb5_context,
220 krb5_auth_context *,
221 krb5_const krb5_data *,
222 krb5_const_principal,
223 krb5_keytab, krb5_flags *,
224 krb5_ticket **) = NULL;
225 static krb5_error_code(_stdcall *p_krb5_mk_req_extended)
226 (krb5_context, krb5_auth_context *,
227 krb5_const krb5_flags, krb5_data *, krb5_creds *, krb5_data *) = NULL;
228 static krb5_error_code(_stdcall *p_krb5_init_context) (krb5_context *) = NULL;
229 static void (_stdcall *p_krb5_free_context) (krb5_context) = NULL;
230 static krb5_error_code(_stdcall *p_krb5_cc_default) (krb5_context,
231 krb5_ccache *) = NULL;
232 static krb5_error_code(_stdcall *p_krb5_sname_to_principal)
233 (krb5_context, krb5_const char *, krb5_const char *,
234 krb5_int32, krb5_principal *) = NULL;
235 static krb5_error_code(_stdcall *p_krb5_get_credentials)
236 (krb5_context, krb5_const krb5_flags, krb5_ccache,
237 krb5_creds *, krb5_creds **) = NULL;
238 static krb5_error_code(_stdcall *p_krb5_auth_con_init)
239 (krb5_context, krb5_auth_context *) = NULL;
240 static krb5_error_code(_stdcall *p_krb5_cc_get_principal)
241 (krb5_context context, krb5_ccache cache, krb5_principal *principal) = NULL;
242 static krb5_error_code(_stdcall *p_krb5_auth_con_free)
243 (krb5_context, krb5_auth_context) = NULL;
244 static krb5_error_code(_stdcall *p_krb5_decrypt_tkt_part)
245 (krb5_context, krb5_const krb5_keyblock *, krb5_ticket *) = NULL;
246 static krb5_error_code(_stdcall *p_krb5_timeofday)
247 (krb5_context context, krb5_int32 *timeret) = NULL;
248 static krb5_error_code(_stdcall *p_krb5_rc_default)
249 (krb5_context context, krb5_rcache *rc) = NULL;
250 static krb5_error_code(_stdcall *p_krb5_rc_initialize)
251 (krb5_context context, krb5_rcache rc, krb5_deltat lifespan) = NULL;
252 static krb5_error_code(_stdcall *p_krb5_rc_get_lifespan)
253 (krb5_context context, krb5_rcache rc, krb5_deltat *lifespan) = NULL;
254 static krb5_error_code(_stdcall *p_krb5_rc_destroy)
255 (krb5_context context, krb5_rcache rc) = NULL;
256 static krb5_boolean(_stdcall *p_krb5_principal_compare)
257 (krb5_context, krb5_const_principal, krb5_const_principal) = NULL;
258 static size_t (_stdcall *p_krb5_checksum_size) (krb5_context context,
259 krb5_cksumtype ctype) = NULL;
260 static krb5_boolean(_stdcall *p_valid_cksumtype) (krb5_cksumtype ctype) =
261 NULL;
262 static krb5_error_code(_stdcall *p_krb5_kt_free_entry)
263 (krb5_context, krb5_keytab_entry *) = NULL;
264 static krb5_error_code(_stdcall *p_krb5_auth_con_setrcache) (krb5_context,
265 krb5_auth_context,
266 krb5_rcache) =
267 NULL;
268 static krb5_error_code(_stdcall *p_krb5_get_server_rcache) (krb5_context,
269 krb5_const
270 krb5_data *,
271 krb5_rcache *) =
272 NULL;
273 static krb5_error_code(*p_krb5_auth_con_getrcache) (krb5_context,
274 krb5_auth_context,
275 krb5_rcache *) = NULL;
276 static krb5_error_code(_stdcall *p_krb5_kt_close) (krb5_context context,
277 krb5_keytab keytab) = NULL;
278 static krb5_error_code(_stdcall *p_krb5_kt_get_entry) (krb5_context context,
279 krb5_keytab keytab,
280 krb5_const_principal
281 principal,
282 krb5_kvno vno,
283 krb5_enctype enctype,
284 krb5_keytab_entry
285 *entry) = NULL;
286 static int krb5_loaded = 0; /* only attempt to initialize func ptrs once */
287
288 /* Function to Load the Kerberos 5 DLL and initialize function pointers */
289 void load_krb5_dll(void)
290 {
291 HANDLE hKRB5_32;
292
293 krb5_loaded++;
294 hKRB5_32 = LoadLibrary(TEXT("KRB5_32"));
295 if (!hKRB5_32)
296 return;
297
298 (FARPROC) p_krb5_free_data_contents =
299 GetProcAddress(hKRB5_32, "krb5_free_data_contents");
300 (FARPROC) p_krb5_free_context =
301 GetProcAddress(hKRB5_32, "krb5_free_context");
302 (FARPROC) p_krb5_auth_con_free =
303 GetProcAddress(hKRB5_32, "krb5_auth_con_free");
304 (FARPROC) p_krb5_free_principal =
305 GetProcAddress(hKRB5_32, "krb5_free_principal");
306 (FARPROC) p_krb5_mk_req_extended =
307 GetProcAddress(hKRB5_32, "krb5_mk_req_extended");
308 (FARPROC) p_krb5_get_credentials =
309 GetProcAddress(hKRB5_32, "krb5_get_credentials");
310 (FARPROC) p_krb5_cc_get_principal =
311 GetProcAddress(hKRB5_32, "krb5_cc_get_principal");
312 (FARPROC) p_krb5_cc_default = GetProcAddress(hKRB5_32, "krb5_cc_default");
313 (FARPROC) p_krb5_sname_to_principal =
314 GetProcAddress(hKRB5_32, "krb5_sname_to_principal");
315 (FARPROC) p_krb5_init_context =
316 GetProcAddress(hKRB5_32, "krb5_init_context");
317 (FARPROC) p_krb5_free_ticket =
318 GetProcAddress(hKRB5_32, "krb5_free_ticket");
319 (FARPROC) p_krb5_rd_req = GetProcAddress(hKRB5_32, "krb5_rd_req");
320 (FARPROC) p_krb5_principal_compare =
321 GetProcAddress(hKRB5_32, "krb5_principal_compare");
322 (FARPROC) p_krb5_decrypt_tkt_part =
323 GetProcAddress(hKRB5_32, "krb5_decrypt_tkt_part");
324 (FARPROC) p_krb5_timeofday = GetProcAddress(hKRB5_32, "krb5_timeofday");
325 (FARPROC) p_krb5_rc_default = GetProcAddress(hKRB5_32, "krb5_rc_default");
326 (FARPROC) p_krb5_rc_initialize =
327 GetProcAddress(hKRB5_32, "krb5_rc_initialize");
328 (FARPROC) p_krb5_rc_get_lifespan =
329 GetProcAddress(hKRB5_32, "krb5_rc_get_lifespan");
330 (FARPROC) p_krb5_rc_destroy = GetProcAddress(hKRB5_32, "krb5_rc_destroy");
331 (FARPROC) p_krb5_kt_default = GetProcAddress(hKRB5_32, "krb5_kt_default");
332 (FARPROC) p_krb5_kt_resolve = GetProcAddress(hKRB5_32, "krb5_kt_resolve");
333 (FARPROC) p_krb5_auth_con_init =
334 GetProcAddress(hKRB5_32, "krb5_auth_con_init");
335 (FARPROC) p_valid_cksumtype = GetProcAddress(hKRB5_32, "valid_cksumtype");
336 (FARPROC) p_krb5_checksum_size =
337 GetProcAddress(hKRB5_32, "krb5_checksum_size");
338 (FARPROC) p_krb5_kt_free_entry =
339 GetProcAddress(hKRB5_32, "krb5_kt_free_entry");
340 (FARPROC) p_krb5_auth_con_setrcache =
341 GetProcAddress(hKRB5_32, "krb5_auth_con_setrcache");
342 (FARPROC) p_krb5_get_server_rcache =
343 GetProcAddress(hKRB5_32, "krb5_get_server_rcache");
344 (FARPROC) p_krb5_auth_con_getrcache =
345 GetProcAddress(hKRB5_32, "krb5_auth_con_getrcache");
346 (FARPROC) p_krb5_kt_close = GetProcAddress(hKRB5_32, "krb5_kt_close");
347 (FARPROC) p_krb5_kt_get_entry =
348 GetProcAddress(hKRB5_32, "krb5_kt_get_entry");
349 }
350
351 /* Stubs for each function to be dynamicly loaded */
352 void kssl_krb5_free_data_contents(krb5_context CO, krb5_data *data)
353 {
354 if (!krb5_loaded)
355 load_krb5_dll();
356
357 if (p_krb5_free_data_contents)
358 p_krb5_free_data_contents(CO, data);
359 }
360
361 krb5_error_code
362 kssl_krb5_mk_req_extended(krb5_context CO,
363 krb5_auth_context *pACO,
364 krb5_const krb5_flags F,
365 krb5_data *pD1, krb5_creds *pC, krb5_data *pD2)
366 {
367 if (!krb5_loaded)
368 load_krb5_dll();
369
370 if (p_krb5_mk_req_extended)
371 return (p_krb5_mk_req_extended(CO, pACO, F, pD1, pC, pD2));
372 else
373 return KRB5KRB_ERR_GENERIC;
374 }
375
376 krb5_error_code
377 kssl_krb5_auth_con_init(krb5_context CO, krb5_auth_context *pACO)
378 {
379 if (!krb5_loaded)
380 load_krb5_dll();
381
382 if (p_krb5_auth_con_init)
383 return (p_krb5_auth_con_init(CO, pACO));
384 else
385 return KRB5KRB_ERR_GENERIC;
386 }
387
388 krb5_error_code
389 kssl_krb5_auth_con_free(krb5_context CO, krb5_auth_context ACO)
390 {
391 if (!krb5_loaded)
392 load_krb5_dll();
393
394 if (p_krb5_auth_con_free)
395 return (p_krb5_auth_con_free(CO, ACO));
396 else
397 return KRB5KRB_ERR_GENERIC;
398 }
399
400 krb5_error_code
401 kssl_krb5_get_credentials(krb5_context CO,
402 krb5_const krb5_flags F,
403 krb5_ccache CC, krb5_creds *pCR, krb5_creds **ppCR)
404 {
405 if (!krb5_loaded)
406 load_krb5_dll();
407
408 if (p_krb5_get_credentials)
409 return (p_krb5_get_credentials(CO, F, CC, pCR, ppCR));
410 else
411 return KRB5KRB_ERR_GENERIC;
412 }
413
414 krb5_error_code
415 kssl_krb5_sname_to_principal(krb5_context CO,
416 krb5_const char *pC1,
417 krb5_const char *pC2,
418 krb5_int32 I, krb5_principal *pPR)
419 {
420 if (!krb5_loaded)
421 load_krb5_dll();
422
423 if (p_krb5_sname_to_principal)
424 return (p_krb5_sname_to_principal(CO, pC1, pC2, I, pPR));
425 else
426 return KRB5KRB_ERR_GENERIC;
427 }
428
429 krb5_error_code kssl_krb5_cc_default(krb5_context CO, krb5_ccache *pCC)
430 {
431 if (!krb5_loaded)
432 load_krb5_dll();
433
434 if (p_krb5_cc_default)
435 return (p_krb5_cc_default(CO, pCC));
436 else
437 return KRB5KRB_ERR_GENERIC;
438 }
439
440 krb5_error_code kssl_krb5_init_context(krb5_context *pCO)
441 {
442 if (!krb5_loaded)
443 load_krb5_dll();
444
445 if (p_krb5_init_context)
446 return (p_krb5_init_context(pCO));
447 else
448 return KRB5KRB_ERR_GENERIC;
449 }
450
451 void kssl_krb5_free_context(krb5_context CO)
452 {
453 if (!krb5_loaded)
454 load_krb5_dll();
455
456 if (p_krb5_free_context)
457 p_krb5_free_context(CO);
458 }
459
460 void kssl_krb5_free_principal(krb5_context c, krb5_principal p)
461 {
462 if (!krb5_loaded)
463 load_krb5_dll();
464
465 if (p_krb5_free_principal)
466 p_krb5_free_principal(c, p);
467 }
468
469 krb5_error_code
470 kssl_krb5_kt_resolve(krb5_context con, krb5_const char *sz, krb5_keytab *kt)
471 {
472 if (!krb5_loaded)
473 load_krb5_dll();
474
475 if (p_krb5_kt_resolve)
476 return (p_krb5_kt_resolve(con, sz, kt));
477 else
478 return KRB5KRB_ERR_GENERIC;
479 }
480
481 krb5_error_code kssl_krb5_kt_default(krb5_context con, krb5_keytab *kt)
482 {
483 if (!krb5_loaded)
484 load_krb5_dll();
485
486 if (p_krb5_kt_default)
487 return (p_krb5_kt_default(con, kt));
488 else
489 return KRB5KRB_ERR_GENERIC;
490 }
491
492 krb5_error_code kssl_krb5_free_ticket(krb5_context con, krb5_ticket *kt)
493 {
494 if (!krb5_loaded)
495 load_krb5_dll();
496
497 if (p_krb5_free_ticket)
498 return (p_krb5_free_ticket(con, kt));
499 else
500 return KRB5KRB_ERR_GENERIC;
501 }
502
503 krb5_error_code
504 kssl_krb5_rd_req(krb5_context con, krb5_auth_context *pacon,
505 krb5_const krb5_data *data,
506 krb5_const_principal princ, krb5_keytab keytab,
507 krb5_flags *flags, krb5_ticket **pptkt)
508 {
509 if (!krb5_loaded)
510 load_krb5_dll();
511
512 if (p_krb5_rd_req)
513 return (p_krb5_rd_req(con, pacon, data, princ, keytab, flags, pptkt));
514 else
515 return KRB5KRB_ERR_GENERIC;
516 }
517
518 krb5_boolean
519 krb5_principal_compare(krb5_context con, krb5_const_principal princ1,
520 krb5_const_principal princ2)
521 {
522 if (!krb5_loaded)
523 load_krb5_dll();
524
525 if (p_krb5_principal_compare)
526 return (p_krb5_principal_compare(con, princ1, princ2));
527 else
528 return KRB5KRB_ERR_GENERIC;
529 }
530
531 krb5_error_code
532 krb5_decrypt_tkt_part(krb5_context con, krb5_const krb5_keyblock *keys,
533 krb5_ticket *ticket)
534 {
535 if (!krb5_loaded)
536 load_krb5_dll();
537
538 if (p_krb5_decrypt_tkt_part)
539 return (p_krb5_decrypt_tkt_part(con, keys, ticket));
540 else
541 return KRB5KRB_ERR_GENERIC;
542 }
543
544 krb5_error_code krb5_timeofday(krb5_context con, krb5_int32 *timeret)
545 {
546 if (!krb5_loaded)
547 load_krb5_dll();
548
549 if (p_krb5_timeofday)
550 return (p_krb5_timeofday(con, timeret));
551 else
552 return KRB5KRB_ERR_GENERIC;
553 }
554
555 krb5_error_code krb5_rc_default(krb5_context con, krb5_rcache *rc)
556 {
557 if (!krb5_loaded)
558 load_krb5_dll();
559
560 if (p_krb5_rc_default)
561 return (p_krb5_rc_default(con, rc));
562 else
563 return KRB5KRB_ERR_GENERIC;
564 }
565
566 krb5_error_code
567 krb5_rc_initialize(krb5_context con, krb5_rcache rc, krb5_deltat lifespan)
568 {
569 if (!krb5_loaded)
570 load_krb5_dll();
571
572 if (p_krb5_rc_initialize)
573 return (p_krb5_rc_initialize(con, rc, lifespan));
574 else
575 return KRB5KRB_ERR_GENERIC;
576 }
577
578 krb5_error_code
579 krb5_rc_get_lifespan(krb5_context con, krb5_rcache rc, krb5_deltat *lifespanp)
580 {
581 if (!krb5_loaded)
582 load_krb5_dll();
583
584 if (p_krb5_rc_get_lifespan)
585 return (p_krb5_rc_get_lifespan(con, rc, lifespanp));
586 else
587 return KRB5KRB_ERR_GENERIC;
588 }
589
590 krb5_error_code krb5_rc_destroy(krb5_context con, krb5_rcache rc)
591 {
592 if (!krb5_loaded)
593 load_krb5_dll();
594
595 if (p_krb5_rc_destroy)
596 return (p_krb5_rc_destroy(con, rc));
597 else
598 return KRB5KRB_ERR_GENERIC;
599 }
600
601 size_t krb5_checksum_size(krb5_context context, krb5_cksumtype ctype)
602 {
603 if (!krb5_loaded)
604 load_krb5_dll();
605
606 if (p_krb5_checksum_size)
607 return (p_krb5_checksum_size(context, ctype));
608 else
609 return KRB5KRB_ERR_GENERIC;
610 }
611
612 krb5_boolean valid_cksumtype(krb5_cksumtype ctype)
613 {
614 if (!krb5_loaded)
615 load_krb5_dll();
616
617 if (p_valid_cksumtype)
618 return (p_valid_cksumtype(ctype));
619 else
620 return KRB5KRB_ERR_GENERIC;
621 }
622
623 krb5_error_code krb5_kt_free_entry(krb5_context con, krb5_keytab_entry *entry)
624 {
625 if (!krb5_loaded)
626 load_krb5_dll();
627
628 if (p_krb5_kt_free_entry)
629 return (p_krb5_kt_free_entry(con, entry));
630 else
631 return KRB5KRB_ERR_GENERIC;
632 }
633
634 /* Structure definitions */
635 # ifndef NO_DEF_KRB5_CCACHE
636 # ifndef krb5_x
637 # define krb5_x(ptr,args) ((ptr)?((*(ptr)) args):(abort(),1))
638 # define krb5_xc(ptr,args) ((ptr)?((*(ptr)) args):(abort(),(char*)0))
639 # endif
640
641 typedef krb5_pointer krb5_cc_cursor; /* cursor for sequential lookup */
642
643 typedef struct _krb5_ccache {
644 krb5_magic magic;
645 struct _krb5_cc_ops FAR *ops;
646 krb5_pointer data;
647 } *krb5_ccache;
648
649 typedef struct _krb5_cc_ops {
650 krb5_magic magic;
651 char *prefix;
652 char *(KRB5_CALLCONV *get_name)
653 (krb5_context, krb5_ccache);
654 krb5_error_code(KRB5_CALLCONV *resolve)
655 (krb5_context, krb5_ccache *, const char *);
656 krb5_error_code(KRB5_CALLCONV *gen_new)
657 (krb5_context, krb5_ccache *);
658 krb5_error_code(KRB5_CALLCONV *init)
659 (krb5_context, krb5_ccache, krb5_principal);
660 krb5_error_code(KRB5_CALLCONV *destroy)
661 (krb5_context, krb5_ccache);
662 krb5_error_code(KRB5_CALLCONV *close)
663 (krb5_context, krb5_ccache);
664 krb5_error_code(KRB5_CALLCONV *store)
665 (krb5_context, krb5_ccache, krb5_creds *);
666 krb5_error_code(KRB5_CALLCONV *retrieve)
667 (krb5_context, krb5_ccache, krb5_flags, krb5_creds *, krb5_creds *);
668 krb5_error_code(KRB5_CALLCONV *get_princ)
669 (krb5_context, krb5_ccache, krb5_principal *);
670 krb5_error_code(KRB5_CALLCONV *get_first)
671 (krb5_context, krb5_ccache, krb5_cc_cursor *);
672 krb5_error_code(KRB5_CALLCONV *get_next)
673 (krb5_context, krb5_ccache, krb5_cc_cursor *, krb5_creds *);
674 krb5_error_code(KRB5_CALLCONV *end_get)
675 (krb5_context, krb5_ccache, krb5_cc_cursor *);
676 krb5_error_code(KRB5_CALLCONV *remove_cred)
677 (krb5_context, krb5_ccache, krb5_flags, krb5_creds *);
678 krb5_error_code(KRB5_CALLCONV *set_flags)
679 (krb5_context, krb5_ccache, krb5_flags);
680 } krb5_cc_ops;
681 # endif /* NO_DEF_KRB5_CCACHE */
682
683 krb5_error_code
684 kssl_krb5_cc_get_principal
685 (krb5_context context, krb5_ccache cache, krb5_principal *principal) {
686 if (p_krb5_cc_get_principal)
687 return (p_krb5_cc_get_principal(context, cache, principal));
688 else
689 return (krb5_x((cache)->ops->get_princ, (context, cache, principal)));
690 }
691
692 krb5_error_code
693 kssl_krb5_auth_con_setrcache(krb5_context con, krb5_auth_context acon,
694 krb5_rcache rcache)
695 {
696 if (p_krb5_auth_con_setrcache)
697 return (p_krb5_auth_con_setrcache(con, acon, rcache));
698 else
699 return KRB5KRB_ERR_GENERIC;
700 }
701
702 krb5_error_code
703 kssl_krb5_get_server_rcache(krb5_context con, krb5_const krb5_data *data,
704 krb5_rcache *rcache)
705 {
706 if (p_krb5_get_server_rcache)
707 return (p_krb5_get_server_rcache(con, data, rcache));
708 else
709 return KRB5KRB_ERR_GENERIC;
710 }
711
712 krb5_error_code
713 kssl_krb5_auth_con_getrcache(krb5_context con, krb5_auth_context acon,
714 krb5_rcache *prcache)
715 {
716 if (p_krb5_auth_con_getrcache)
717 return (p_krb5_auth_con_getrcache(con, acon, prcache));
718 else
719 return KRB5KRB_ERR_GENERIC;
720 }
721
722 krb5_error_code kssl_krb5_kt_close(krb5_context context, krb5_keytab keytab)
723 {
724 if (p_krb5_kt_close)
725 return (p_krb5_kt_close(context, keytab));
726 else
727 return KRB5KRB_ERR_GENERIC;
728 }
729
730 krb5_error_code
731 kssl_krb5_kt_get_entry(krb5_context context, krb5_keytab keytab,
732 krb5_const_principal principal, krb5_kvno vno,
733 krb5_enctype enctype, krb5_keytab_entry *entry)
734 {
735 if (p_krb5_kt_get_entry)
736 return (p_krb5_kt_get_entry
737 (context, keytab, principal, vno, enctype, entry));
738 else
739 return KRB5KRB_ERR_GENERIC;
740 }
741 # endif /* OPENSSL_SYS_WINDOWS || OPENSSL_SYS_WIN32 */
742
743 /*
744 * memory allocation functions for non-temporary storage (e.g. stuff that
745 * gets saved into the kssl context)
746 */
747 static void *kssl_calloc(size_t nmemb, size_t size)
748 {
749 void *p;
750
751 p = OPENSSL_malloc(nmemb * size);
752 if (p) {
753 memset(p, 0, nmemb * size);
754 }
755 return p;
756 }
757
758 # define kssl_malloc(size) OPENSSL_malloc((size))
759 # define kssl_realloc(ptr, size) OPENSSL_realloc(ptr, size)
760 # define kssl_free(ptr) OPENSSL_free((ptr))
761
762 char
763 *kstring(char *string)
764 {
765 static char *null = "[NULL]";
766
767 return ((string == NULL) ? null : string);
768 }
769
770 /*
771 * Given KRB5 enctype (basically DES or 3DES), return closest match openssl
772 * EVP_ encryption algorithm. Return NULL for unknown or problematic
773 * (krb5_dk_encrypt) enctypes. Assume ENCTYPE_*_RAW (krb5_raw_encrypt) are
774 * OK.
775 */
776 const EVP_CIPHER *kssl_map_enc(krb5_enctype enctype)
777 {
778 switch (enctype) {
779 case ENCTYPE_DES_HMAC_SHA1: /* EVP_des_cbc(); */
780 case ENCTYPE_DES_CBC_CRC:
781 case ENCTYPE_DES_CBC_MD4:
782 case ENCTYPE_DES_CBC_MD5:
783 case ENCTYPE_DES_CBC_RAW:
784 return EVP_des_cbc();
785 break;
786 case ENCTYPE_DES3_CBC_SHA1: /* EVP_des_ede3_cbc(); */
787 case ENCTYPE_DES3_CBC_SHA:
788 case ENCTYPE_DES3_CBC_RAW:
789 return EVP_des_ede3_cbc();
790 break;
791 default:
792 return NULL;
793 break;
794 }
795 }
796
797 /*
798 * Return true:1 if p "looks like" the start of the real authenticator
799 * described in kssl_skip_confound() below. The ASN.1 pattern is "62 xx 30
800 * yy" (APPLICATION-2, SEQUENCE), where xx-yy =~ 2, and xx and yy are
801 * possibly multi-byte length fields.
802 */
803 static int kssl_test_confound(unsigned char *p)
804 {
805 int len = 2;
806 int xx = 0, yy = 0;
807
808 if (*p++ != 0x62)
809 return 0;
810 if (*p > 0x82)
811 return 0;
812 switch (*p) {
813 case 0x82:
814 p++;
815 xx = (*p++ << 8);
816 xx += *p++;
817 break;
818 case 0x81:
819 p++;
820 xx = *p++;
821 break;
822 case 0x80:
823 return 0;
824 default:
825 xx = *p++;
826 break;
827 }
828 if (*p++ != 0x30)
829 return 0;
830 if (*p > 0x82)
831 return 0;
832 switch (*p) {
833 case 0x82:
834 p++;
835 len += 2;
836 yy = (*p++ << 8);
837 yy += *p++;
838 break;
839 case 0x81:
840 p++;
841 len++;
842 yy = *p++;
843 break;
844 case 0x80:
845 return 0;
846 default:
847 yy = *p++;
848 break;
849 }
850
851 return (xx - len == yy) ? 1 : 0;
852 }
853
854 /*
855 * Allocate, fill, and return cksumlens array of checksum lengths. This
856 * array holds just the unique elements from the krb5_cksumarray[]. array[n]
857 * == 0 signals end of data. The krb5_cksumarray[] was an internal variable
858 * that has since been replaced by a more general method for storing the
859 * data. It should not be used. Instead we use real API calls and make a
860 * guess for what the highest assigned CKSUMTYPE_ constant is. As of 1.2.2
861 * it is 0x000c (CKSUMTYPE_HMAC_SHA1_DES3). So we will use 0x0010.
862 */
863 static size_t *populate_cksumlens(void)
864 {
865 int i, j, n;
866 static size_t *cklens = NULL;
867
868 # ifdef KRB5_MIT_OLD11
869 n = krb5_max_cksum;
870 # else
871 n = 0x0010;
872 # endif /* KRB5_MIT_OLD11 */
873
874 # ifdef KRB5CHECKAUTH
875 if (!cklens && !(cklens = (size_t *)calloc(sizeof(int), n + 1)))
876 return NULL;
877
878 for (i = 0; i < n; i++) {
879 if (!valid_cksumtype(i))
880 continue; /* array has holes */
881 for (j = 0; j < n; j++) {
882 if (cklens[j] == 0) {
883 cklens[j] = krb5_checksum_size(NULL, i);
884 break; /* krb5 elem was new: add */
885 }
886 if (cklens[j] == krb5_checksum_size(NULL, i)) {
887 break; /* ignore duplicate elements */
888 }
889 }
890 }
891 # endif /* KRB5CHECKAUTH */
892
893 return cklens;
894 }
895
896 /*-
897 * Return pointer to start of real authenticator within authenticator, or
898 * return NULL on error.
899 * Decrypted authenticator looks like this:
900 * [0 or 8 byte confounder] [4-24 byte checksum] [real authent'r]
901 * This hackery wouldn't be necessary if MIT KRB5 1.0.6 had the
902 * krb5_auth_con_getcksumtype() function advertised in its krb5.h.
903 */
904 unsigned char *kssl_skip_confound(krb5_enctype etype, unsigned char *a)
905 {
906 int i, conlen;
907 size_t cklen;
908 static size_t *cksumlens = NULL;
909 unsigned char *test_auth;
910
911 conlen = (etype) ? 8 : 0;
912
913 if (!cksumlens && !(cksumlens = populate_cksumlens()))
914 return NULL;
915 for (i = 0; (cklen = cksumlens[i]) != 0; i++) {
916 test_auth = a + conlen + cklen;
917 if (kssl_test_confound(test_auth))
918 return test_auth;
919 }
920
921 return NULL;
922 }
923
924 /*
925 * Set kssl_err error info when reason text is a simple string kssl_err =
926 * struct { int reason; char text[KSSL_ERR_MAX+1]; }
927 */
928 void kssl_err_set(KSSL_ERR *kssl_err, int reason, char *text)
929 {
930 if (kssl_err == NULL)
931 return;
932
933 kssl_err->reason = reason;
934 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX, "%s", text);
935 return;
936 }
937
938 /*
939 * Display contents of krb5_data struct, for debugging
940 */
941 void print_krb5_data(char *label, krb5_data *kdata)
942 {
943 int i;
944
945 fprintf(stderr, "%s[%d] ", label, kdata->length);
946 for (i = 0; i < (int)kdata->length; i++) {
947 if (0 && isprint((int)kdata->data[i]))
948 fprintf(stderr, "%c ", kdata->data[i]);
949 else
950 fprintf(stderr, "%02x ", (unsigned char)kdata->data[i]);
951 }
952 fprintf(stderr, "\n");
953 }
954
955 /*
956 * Display contents of krb5_authdata struct, for debugging
957 */
958 void print_krb5_authdata(char *label, krb5_authdata **adata)
959 {
960 if (adata == NULL) {
961 fprintf(stderr, "%s, authdata==0\n", label);
962 return;
963 }
964 fprintf(stderr, "%s [%p]\n", label, (void *)adata);
965 # if 0
966 {
967 int i;
968 fprintf(stderr, "%s[at%d:%d] ", label, adata->ad_type, adata->length);
969 for (i = 0; i < adata->length; i++) {
970 fprintf(stderr, (isprint(adata->contents[i])) ? "%c " : "%02x",
971 adata->contents[i]);
972 }
973 fprintf(stderr, "\n");
974 }
975 # endif
976 }
977
978 /*
979 * Display contents of krb5_keyblock struct, for debugging
980 */
981 void print_krb5_keyblock(char *label, krb5_keyblock *keyblk)
982 {
983 int i;
984
985 if (keyblk == NULL) {
986 fprintf(stderr, "%s, keyblk==0\n", label);
987 return;
988 }
989 # ifdef KRB5_HEIMDAL
990 fprintf(stderr, "%s\n\t[et%d:%d]: ", label, keyblk->keytype,
991 keyblk->keyvalue->length);
992 for (i = 0; i < (int)keyblk->keyvalue->length; i++) {
993 fprintf(stderr, "%02x",
994 (unsigned char *)(keyblk->keyvalue->contents)[i]);
995 }
996 fprintf(stderr, "\n");
997 # else
998 fprintf(stderr, "%s\n\t[et%d:%d]: ", label, keyblk->enctype,
999 keyblk->length);
1000 for (i = 0; i < (int)keyblk->length; i++) {
1001 fprintf(stderr, "%02x", keyblk->contents[i]);
1002 }
1003 fprintf(stderr, "\n");
1004 # endif
1005 }
1006
1007 /*
1008 * Display contents of krb5_principal_data struct, for debugging
1009 * (krb5_principal is typedef'd == krb5_principal_data *)
1010 */
1011 static void print_krb5_princ(char *label, krb5_principal_data *princ)
1012 {
1013 int i, ui, uj;
1014
1015 fprintf(stderr, "%s principal Realm: ", label);
1016 if (princ == NULL)
1017 return;
1018 for (ui = 0; ui < (int)princ->realm.length; ui++)
1019 putchar(princ->realm.data[ui]);
1020 fprintf(stderr, " (nametype %d) has %d strings:\n", princ->type,
1021 princ->length);
1022 for (i = 0; i < (int)princ->length; i++) {
1023 fprintf(stderr, "\t%d [%d]: ", i, princ->data[i].length);
1024 for (uj = 0; uj < (int)princ->data[i].length; uj++) {
1025 putchar(princ->data[i].data[uj]);
1026 }
1027 fprintf(stderr, "\n");
1028 }
1029 return;
1030 }
1031
1032 /*- Given krb5 service (typically "kssl") and hostname in kssl_ctx,
1033 * Return encrypted Kerberos ticket for service @ hostname.
1034 * If authenp is non-NULL, also return encrypted authenticator,
1035 * whose data should be freed by caller.
1036 * (Originally was: Create Kerberos AP_REQ message for SSL Client.)
1037 *
1038 * 19990628 VRS Started; Returns Kerberos AP_REQ message.
1039 * 20010409 VRS Modified for RFC2712; Returns enc tkt.
1040 * 20010606 VRS May also return optional authenticator.
1041 */
1042 krb5_error_code kssl_cget_tkt( /* UPDATE */ KSSL_CTX *kssl_ctx,
1043 /*
1044 * OUT
1045 */ krb5_data **enc_ticketp,
1046 /*
1047 * UPDATE
1048 */ krb5_data *authenp,
1049 /*
1050 * OUT
1051 */ KSSL_ERR *kssl_err)
1052 {
1053 krb5_error_code krb5rc = KRB5KRB_ERR_GENERIC;
1054 krb5_context krb5context = NULL;
1055 krb5_auth_context krb5auth_context = NULL;
1056 krb5_ccache krb5ccdef = NULL;
1057 krb5_creds krb5creds, *krb5credsp = NULL;
1058 krb5_data krb5_app_req;
1059
1060 kssl_err_set(kssl_err, 0, "");
1061 memset((char *)&krb5creds, 0, sizeof(krb5creds));
1062
1063 if (!kssl_ctx) {
1064 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT, "No kssl_ctx defined.\n");
1065 goto err;
1066 } else if (!kssl_ctx->service_host) {
1067 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1068 "kssl_ctx service_host undefined.\n");
1069 goto err;
1070 }
1071
1072 if ((krb5rc = krb5_init_context(&krb5context)) != 0) {
1073 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1074 "krb5_init_context() fails: %d\n", krb5rc);
1075 kssl_err->reason = SSL_R_KRB5_C_INIT;
1076 goto err;
1077 }
1078
1079 if ((krb5rc = krb5_sname_to_principal(krb5context,
1080 kssl_ctx->service_host,
1081 (kssl_ctx->service_name) ?
1082 kssl_ctx->service_name : KRB5SVC,
1083 KRB5_NT_SRV_HST,
1084 &krb5creds.server)) != 0) {
1085 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1086 "krb5_sname_to_principal() fails for %s/%s\n",
1087 kssl_ctx->service_host,
1088 (kssl_ctx->
1089 service_name) ? kssl_ctx->service_name : KRB5SVC);
1090 kssl_err->reason = SSL_R_KRB5_C_INIT;
1091 goto err;
1092 }
1093
1094 if ((krb5rc = krb5_cc_default(krb5context, &krb5ccdef)) != 0) {
1095 kssl_err_set(kssl_err, SSL_R_KRB5_C_CC_PRINC,
1096 "krb5_cc_default fails.\n");
1097 goto err;
1098 }
1099
1100 if ((krb5rc = krb5_cc_get_principal(krb5context, krb5ccdef,
1101 &krb5creds.client)) != 0) {
1102 kssl_err_set(kssl_err, SSL_R_KRB5_C_CC_PRINC,
1103 "krb5_cc_get_principal() fails.\n");
1104 goto err;
1105 }
1106
1107 if ((krb5rc = krb5_get_credentials(krb5context, 0, krb5ccdef,
1108 &krb5creds, &krb5credsp)) != 0) {
1109 kssl_err_set(kssl_err, SSL_R_KRB5_C_GET_CRED,
1110 "krb5_get_credentials() fails.\n");
1111 goto err;
1112 }
1113
1114 *enc_ticketp = &krb5credsp->ticket;
1115 # ifdef KRB5_HEIMDAL
1116 kssl_ctx->enctype = krb5credsp->session.keytype;
1117 # else
1118 kssl_ctx->enctype = krb5credsp->keyblock.enctype;
1119 # endif
1120
1121 krb5rc = KRB5KRB_ERR_GENERIC;
1122 /* caller should free data of krb5_app_req */
1123 /*
1124 * 20010406 VRS deleted for real KerberosWrapper 20010605 VRS reinstated
1125 * to offer Authenticator to KerberosWrapper
1126 */
1127 krb5_app_req.length = 0;
1128 if (authenp) {
1129 krb5_data krb5in_data;
1130 const unsigned char *p;
1131 long arlen;
1132 KRB5_APREQBODY *ap_req;
1133
1134 authenp->length = 0;
1135 krb5in_data.data = NULL;
1136 krb5in_data.length = 0;
1137 if ((krb5rc = krb5_mk_req_extended(krb5context,
1138 &krb5auth_context, 0, &krb5in_data,
1139 krb5credsp, &krb5_app_req)) != 0) {
1140 kssl_err_set(kssl_err, SSL_R_KRB5_C_MK_REQ,
1141 "krb5_mk_req_extended() fails.\n");
1142 goto err;
1143 }
1144
1145 arlen = krb5_app_req.length;
1146 p = (unsigned char *)krb5_app_req.data;
1147 ap_req = (KRB5_APREQBODY *)d2i_KRB5_APREQ(NULL, &p, arlen);
1148 if (ap_req) {
1149 authenp->length = i2d_KRB5_ENCDATA(ap_req->authenticator, NULL);
1150 if (authenp->length && (authenp->data = malloc(authenp->length))) {
1151 unsigned char *adp = (unsigned char *)authenp->data;
1152 authenp->length =
1153 i2d_KRB5_ENCDATA(ap_req->authenticator, &adp);
1154 }
1155 }
1156
1157 if (ap_req)
1158 KRB5_APREQ_free((KRB5_APREQ *) ap_req);
1159 if (krb5_app_req.length)
1160 kssl_krb5_free_data_contents(krb5context, &krb5_app_req);
1161 }
1162 # ifdef KRB5_HEIMDAL
1163 if (kssl_ctx_setkey(kssl_ctx, &krb5credsp->session)) {
1164 kssl_err_set(kssl_err, SSL_R_KRB5_C_INIT,
1165 "kssl_ctx_setkey() fails.\n");
1166 }
1167 # else
1168 if (kssl_ctx_setkey(kssl_ctx, &krb5credsp->keyblock)) {
1169 kssl_err_set(kssl_err, SSL_R_KRB5_C_INIT,
1170 "kssl_ctx_setkey() fails.\n");
1171 }
1172 # endif
1173 else
1174 krb5rc = 0;
1175
1176 err:
1177 # ifdef KSSL_DEBUG
1178 kssl_ctx_show(kssl_ctx);
1179 # endif /* KSSL_DEBUG */
1180
1181 if (krb5creds.client)
1182 krb5_free_principal(krb5context, krb5creds.client);
1183 if (krb5creds.server)
1184 krb5_free_principal(krb5context, krb5creds.server);
1185 if (krb5auth_context)
1186 krb5_auth_con_free(krb5context, krb5auth_context);
1187 if (krb5context)
1188 krb5_free_context(krb5context);
1189 return (krb5rc);
1190 }
1191
1192 /*-
1193 * Given d2i_-decoded asn1ticket, allocate and return a new krb5_ticket.
1194 * Return Kerberos error code and kssl_err struct on error.
1195 * Allocates krb5_ticket and krb5_principal; caller should free these.
1196 *
1197 * 20010410 VRS Implemented krb5_decode_ticket() as
1198 * old_krb5_decode_ticket(). Missing from MIT1.0.6.
1199 * 20010615 VRS Re-cast as openssl/asn1 d2i_*() functions.
1200 * Re-used some of the old krb5_decode_ticket()
1201 * code here. This tkt should alloc/free just
1202 * like the real thing.
1203 */
1204 static krb5_error_code kssl_TKT2tkt( /* IN */ krb5_context krb5context,
1205 /*
1206 * IN
1207 */ KRB5_TKTBODY *asn1ticket,
1208 /*
1209 * OUT
1210 */ krb5_ticket **krb5ticket,
1211 /*
1212 * OUT
1213 */ KSSL_ERR *kssl_err)
1214 {
1215 krb5_error_code krb5rc = KRB5KRB_ERR_GENERIC;
1216 krb5_ticket *new5ticket = NULL;
1217 ASN1_GENERALSTRING *gstr_svc, *gstr_host;
1218
1219 *krb5ticket = NULL;
1220
1221 if (asn1ticket == NULL || asn1ticket->realm == NULL ||
1222 asn1ticket->sname == NULL ||
1223 sk_ASN1_GENERALSTRING_num(asn1ticket->sname->namestring) < 2) {
1224 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1225 "Null field in asn1ticket.\n");
1226 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1227 return KRB5KRB_ERR_GENERIC;
1228 }
1229
1230 if ((new5ticket = (krb5_ticket *)calloc(1, sizeof(krb5_ticket))) == NULL) {
1231 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1232 "Unable to allocate new krb5_ticket.\n");
1233 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1234 return ENOMEM; /* or KRB5KRB_ERR_GENERIC; */
1235 }
1236
1237 gstr_svc = sk_ASN1_GENERALSTRING_value(asn1ticket->sname->namestring, 0);
1238 gstr_host = sk_ASN1_GENERALSTRING_value(asn1ticket->sname->namestring, 1);
1239
1240 if ((krb5rc = kssl_build_principal_2(krb5context,
1241 &new5ticket->server,
1242 asn1ticket->realm->length,
1243 (char *)asn1ticket->realm->data,
1244 gstr_svc->length,
1245 (char *)gstr_svc->data,
1246 gstr_host->length,
1247 (char *)gstr_host->data)) != 0) {
1248 free(new5ticket);
1249 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1250 "Error building ticket server principal.\n");
1251 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1252 return krb5rc; /* or KRB5KRB_ERR_GENERIC; */
1253 }
1254
1255 krb5_princ_type(krb5context, new5ticket->server) =
1256 asn1ticket->sname->nametype->data[0];
1257 new5ticket->enc_part.enctype = asn1ticket->encdata->etype->data[0];
1258 new5ticket->enc_part.kvno = asn1ticket->encdata->kvno->data[0];
1259 new5ticket->enc_part.ciphertext.length =
1260 asn1ticket->encdata->cipher->length;
1261 if ((new5ticket->enc_part.ciphertext.data =
1262 calloc(1, asn1ticket->encdata->cipher->length)) == NULL) {
1263 free(new5ticket);
1264 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1265 "Error allocating cipher in krb5ticket.\n");
1266 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1267 return KRB5KRB_ERR_GENERIC;
1268 } else {
1269 memcpy(new5ticket->enc_part.ciphertext.data,
1270 asn1ticket->encdata->cipher->data,
1271 asn1ticket->encdata->cipher->length);
1272 }
1273
1274 *krb5ticket = new5ticket;
1275 return 0;
1276 }
1277
1278 /*-
1279 * Given krb5 service name in KSSL_CTX *kssl_ctx (typically "kssl"),
1280 * and krb5 AP_REQ message & message length,
1281 * Return Kerberos session key and client principle
1282 * to SSL Server in KSSL_CTX *kssl_ctx.
1283 *
1284 * 19990702 VRS Started.
1285 */
1286 krb5_error_code kssl_sget_tkt( /* UPDATE */ KSSL_CTX *kssl_ctx,
1287 /*
1288 * IN
1289 */ krb5_data *indata,
1290 /*
1291 * OUT
1292 */ krb5_ticket_times *ttimes,
1293 /*
1294 * OUT
1295 */ KSSL_ERR *kssl_err)
1296 {
1297 krb5_error_code krb5rc = KRB5KRB_ERR_GENERIC;
1298 static krb5_context krb5context = NULL;
1299 static krb5_auth_context krb5auth_context = NULL;
1300 krb5_ticket *krb5ticket = NULL;
1301 KRB5_TKTBODY *asn1ticket = NULL;
1302 const unsigned char *p;
1303 krb5_keytab krb5keytab = NULL;
1304 krb5_keytab_entry kt_entry;
1305 krb5_principal krb5server;
1306 krb5_rcache rcache = NULL;
1307
1308 kssl_err_set(kssl_err, 0, "");
1309
1310 if (!kssl_ctx) {
1311 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT, "No kssl_ctx defined.\n");
1312 goto err;
1313 }
1314 # ifdef KSSL_DEBUG
1315 fprintf(stderr, "in kssl_sget_tkt(%s)\n",
1316 kstring(kssl_ctx->service_name));
1317 # endif /* KSSL_DEBUG */
1318
1319 if (!krb5context && (krb5rc = krb5_init_context(&krb5context))) {
1320 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1321 "krb5_init_context() fails.\n");
1322 goto err;
1323 }
1324 if (krb5auth_context &&
1325 (krb5rc = krb5_auth_con_free(krb5context, krb5auth_context))) {
1326 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1327 "krb5_auth_con_free() fails.\n");
1328 goto err;
1329 } else
1330 krb5auth_context = NULL;
1331 if (!krb5auth_context &&
1332 (krb5rc = krb5_auth_con_init(krb5context, &krb5auth_context))) {
1333 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1334 "krb5_auth_con_init() fails.\n");
1335 goto err;
1336 }
1337
1338 if ((krb5rc = krb5_auth_con_getrcache(krb5context, krb5auth_context,
1339 &rcache))) {
1340 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1341 "krb5_auth_con_getrcache() fails.\n");
1342 goto err;
1343 }
1344
1345 if ((krb5rc = krb5_sname_to_principal(krb5context, NULL,
1346 (kssl_ctx->service_name) ?
1347 kssl_ctx->service_name : KRB5SVC,
1348 KRB5_NT_SRV_HST,
1349 &krb5server)) != 0) {
1350 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1351 "krb5_sname_to_principal() fails.\n");
1352 goto err;
1353 }
1354
1355 if (rcache == NULL) {
1356 if ((krb5rc = krb5_get_server_rcache(krb5context,
1357 krb5_princ_component(krb5context,
1358 krb5server,
1359 0),
1360 &rcache))) {
1361 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1362 "krb5_get_server_rcache() fails.\n");
1363 goto err;
1364 }
1365 }
1366
1367 if ((krb5rc =
1368 krb5_auth_con_setrcache(krb5context, krb5auth_context, rcache))) {
1369 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1370 "krb5_auth_con_setrcache() fails.\n");
1371 goto err;
1372 }
1373
1374 /*
1375 * kssl_ctx->keytab_file == NULL ==> use Kerberos default
1376 */
1377 if (kssl_ctx->keytab_file) {
1378 krb5rc = krb5_kt_resolve(krb5context, kssl_ctx->keytab_file,
1379 &krb5keytab);
1380 if (krb5rc) {
1381 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1382 "krb5_kt_resolve() fails.\n");
1383 goto err;
1384 }
1385 } else {
1386 krb5rc = krb5_kt_default(krb5context, &krb5keytab);
1387 if (krb5rc) {
1388 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1389 "krb5_kt_default() fails.\n");
1390 goto err;
1391 }
1392 }
1393
1394 /*- Actual Kerberos5 krb5_recvauth() has initial conversation here
1395 * o check KRB5_SENDAUTH_BADAUTHVERS
1396 * unless KRB5_RECVAUTH_SKIP_VERSION
1397 * o check KRB5_SENDAUTH_BADAPPLVERS
1398 * o send "0" msg if all OK
1399 */
1400
1401 /*-
1402 * 20010411 was using AP_REQ instead of true KerberosWrapper
1403 *
1404 * if ((krb5rc = krb5_rd_req(krb5context, &krb5auth_context,
1405 * &krb5in_data, krb5server, krb5keytab,
1406 * &ap_option, &krb5ticket)) != 0) { Error }
1407 */
1408
1409 p = (unsigned char *)indata->data;
1410 if ((asn1ticket = (KRB5_TKTBODY *)d2i_KRB5_TICKET(NULL, &p,
1411 (long)indata->length))
1412 == NULL) {
1413 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1414 "d2i_KRB5_TICKET() ASN.1 decode failure.\n");
1415 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1416 goto err;
1417 }
1418
1419 /*
1420 * Was: krb5rc = krb5_decode_ticket(krb5in_data,&krb5ticket)) != 0)
1421 */
1422 if ((krb5rc = kssl_TKT2tkt(krb5context, asn1ticket, &krb5ticket,
1423 kssl_err)) != 0) {
1424 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1425 "Error converting ASN.1 ticket to krb5_ticket.\n");
1426 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1427 goto err;
1428 }
1429
1430 if (!krb5_principal_compare(krb5context, krb5server, krb5ticket->server)) {
1431 krb5rc = KRB5_PRINC_NOMATCH;
1432 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1433 "server principal != ticket principal\n");
1434 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1435 goto err;
1436 }
1437 if ((krb5rc = krb5_kt_get_entry(krb5context, krb5keytab,
1438 krb5ticket->server,
1439 krb5ticket->enc_part.kvno,
1440 krb5ticket->enc_part.enctype,
1441 &kt_entry)) != 0) {
1442 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1443 "krb5_kt_get_entry() fails with %x.\n", krb5rc);
1444 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1445 goto err;
1446 }
1447 if ((krb5rc = krb5_decrypt_tkt_part(krb5context, &kt_entry.key,
1448 krb5ticket)) != 0) {
1449 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1450 "krb5_decrypt_tkt_part() failed.\n");
1451 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1452 goto err;
1453 } else {
1454 krb5_kt_free_entry(krb5context, &kt_entry);
1455 # ifdef KSSL_DEBUG
1456 {
1457 int i;
1458 krb5_address **paddr = krb5ticket->enc_part2->caddrs;
1459 fprintf(stderr, "Decrypted ticket fields:\n");
1460 fprintf(stderr, "\tflags: %X, transit-type: %X",
1461 krb5ticket->enc_part2->flags,
1462 krb5ticket->enc_part2->transited.tr_type);
1463 print_krb5_data("\ttransit-data: ",
1464 &(krb5ticket->enc_part2->transited.tr_contents));
1465 fprintf(stderr, "\tcaddrs: %p, authdata: %p\n",
1466 krb5ticket->enc_part2->caddrs,
1467 krb5ticket->enc_part2->authorization_data);
1468 if (paddr) {
1469 fprintf(stderr, "\tcaddrs:\n");
1470 for (i = 0; paddr[i] != NULL; i++) {
1471 krb5_data d;
1472 d.length = paddr[i]->length;
1473 d.data = paddr[i]->contents;
1474 print_krb5_data("\t\tIP: ", &d);
1475 }
1476 }
1477 fprintf(stderr, "\tstart/auth/end times: %d / %d / %d\n",
1478 krb5ticket->enc_part2->times.starttime,
1479 krb5ticket->enc_part2->times.authtime,
1480 krb5ticket->enc_part2->times.endtime);
1481 }
1482 # endif /* KSSL_DEBUG */
1483 }
1484
1485 krb5rc = KRB5_NO_TKT_SUPPLIED;
1486 if (!krb5ticket || !krb5ticket->enc_part2 ||
1487 !krb5ticket->enc_part2->client ||
1488 !krb5ticket->enc_part2->client->data ||
1489 !krb5ticket->enc_part2->session) {
1490 kssl_err_set(kssl_err, SSL_R_KRB5_S_BAD_TICKET,
1491 "bad ticket from krb5_rd_req.\n");
1492 } else if (kssl_ctx_setprinc(kssl_ctx, KSSL_CLIENT,
1493 &krb5ticket->enc_part2->client->realm,
1494 krb5ticket->enc_part2->client->data,
1495 krb5ticket->enc_part2->client->length)) {
1496 kssl_err_set(kssl_err, SSL_R_KRB5_S_BAD_TICKET,
1497 "kssl_ctx_setprinc() fails.\n");
1498 } else if (kssl_ctx_setkey(kssl_ctx, krb5ticket->enc_part2->session)) {
1499 kssl_err_set(kssl_err, SSL_R_KRB5_S_BAD_TICKET,
1500 "kssl_ctx_setkey() fails.\n");
1501 } else if (krb5ticket->enc_part2->flags & TKT_FLG_INVALID) {
1502 krb5rc = KRB5KRB_AP_ERR_TKT_INVALID;
1503 kssl_err_set(kssl_err, SSL_R_KRB5_S_BAD_TICKET,
1504 "invalid ticket from krb5_rd_req.\n");
1505 } else
1506 krb5rc = 0;
1507
1508 kssl_ctx->enctype = krb5ticket->enc_part.enctype;
1509 ttimes->authtime = krb5ticket->enc_part2->times.authtime;
1510 ttimes->starttime = krb5ticket->enc_part2->times.starttime;
1511 ttimes->endtime = krb5ticket->enc_part2->times.endtime;
1512 ttimes->renew_till = krb5ticket->enc_part2->times.renew_till;
1513
1514 err:
1515 # ifdef KSSL_DEBUG
1516 kssl_ctx_show(kssl_ctx);
1517 # endif /* KSSL_DEBUG */
1518
1519 if (asn1ticket)
1520 KRB5_TICKET_free((KRB5_TICKET *) asn1ticket);
1521 if (krb5keytab)
1522 krb5_kt_close(krb5context, krb5keytab);
1523 if (krb5ticket)
1524 krb5_free_ticket(krb5context, krb5ticket);
1525 if (krb5server)
1526 krb5_free_principal(krb5context, krb5server);
1527 return (krb5rc);
1528 }
1529
1530 /*
1531 * Allocate & return a new kssl_ctx struct.
1532 */
1533 KSSL_CTX *kssl_ctx_new(void)
1534 {
1535 return ((KSSL_CTX *)kssl_calloc(1, sizeof(KSSL_CTX)));
1536 }
1537
1538 /*
1539 * Frees a kssl_ctx struct and any allocated memory it holds. Returns NULL.
1540 */
1541 KSSL_CTX *kssl_ctx_free(KSSL_CTX *kssl_ctx)
1542 {
1543 if (kssl_ctx == NULL)
1544 return kssl_ctx;
1545
1546 if (kssl_ctx->key)
1547 OPENSSL_cleanse(kssl_ctx->key, kssl_ctx->length);
1548 if (kssl_ctx->key)
1549 kssl_free(kssl_ctx->key);
1550 if (kssl_ctx->client_princ)
1551 kssl_free(kssl_ctx->client_princ);
1552 if (kssl_ctx->service_host)
1553 kssl_free(kssl_ctx->service_host);
1554 if (kssl_ctx->service_name)
1555 kssl_free(kssl_ctx->service_name);
1556 if (kssl_ctx->keytab_file)
1557 kssl_free(kssl_ctx->keytab_file);
1558
1559 kssl_free(kssl_ctx);
1560 return (KSSL_CTX *)NULL;
1561 }
1562
1563 /*
1564 * Given an array of (krb5_data *) entity (and optional realm), set the plain
1565 * (char *) client_princ or service_host member of the kssl_ctx struct.
1566 */
1567 krb5_error_code
1568 kssl_ctx_setprinc(KSSL_CTX *kssl_ctx, int which,
1569 krb5_data *realm, krb5_data *entity, int nentities)
1570 {
1571 char **princ;
1572 int length;
1573 int i;
1574
1575 if (kssl_ctx == NULL || entity == NULL)
1576 return KSSL_CTX_ERR;
1577
1578 switch (which) {
1579 case KSSL_CLIENT:
1580 princ = &kssl_ctx->client_princ;
1581 break;
1582 case KSSL_SERVER:
1583 princ = &kssl_ctx->service_host;
1584 break;
1585 default:
1586 return KSSL_CTX_ERR;
1587 break;
1588 }
1589 if (*princ)
1590 kssl_free(*princ);
1591
1592 /* Add up all the entity->lengths */
1593 length = 0;
1594 for (i = 0; i < nentities; i++) {
1595 length += entity[i].length;
1596 }
1597 /* Add in space for the '/' character(s) (if any) */
1598 length += nentities - 1;
1599 /* Space for the ('@'+realm+NULL | NULL) */
1600 length += ((realm) ? realm->length + 2 : 1);
1601
1602 if ((*princ = kssl_calloc(1, length)) == NULL)
1603 return KSSL_CTX_ERR;
1604 else {
1605 for (i = 0; i < nentities; i++) {
1606 strncat(*princ, entity[i].data, entity[i].length);
1607 if (i < nentities - 1) {
1608 strcat(*princ, "/");
1609 }
1610 }
1611 if (realm) {
1612 strcat(*princ, "@");
1613 (void)strncat(*princ, realm->data, realm->length);
1614 }
1615 }
1616
1617 return KSSL_CTX_OK;
1618 }
1619
1620 /*- Set one of the plain (char *) string members of the kssl_ctx struct.
1621 * Default values should be:
1622 * which == KSSL_SERVICE => "khost" (KRB5SVC)
1623 * which == KSSL_KEYTAB => "/etc/krb5.keytab" (KRB5KEYTAB)
1624 */
1625 krb5_error_code kssl_ctx_setstring(KSSL_CTX *kssl_ctx, int which, char *text)
1626 {
1627 char **string;
1628
1629 if (!kssl_ctx)
1630 return KSSL_CTX_ERR;
1631
1632 switch (which) {
1633 case KSSL_SERVICE:
1634 string = &kssl_ctx->service_name;
1635 break;
1636 case KSSL_SERVER:
1637 string = &kssl_ctx->service_host;
1638 break;
1639 case KSSL_CLIENT:
1640 string = &kssl_ctx->client_princ;
1641 break;
1642 case KSSL_KEYTAB:
1643 string = &kssl_ctx->keytab_file;
1644 break;
1645 default:
1646 return KSSL_CTX_ERR;
1647 break;
1648 }
1649 if (*string)
1650 kssl_free(*string);
1651
1652 if (!text) {
1653 *string = '\0';
1654 return KSSL_CTX_OK;
1655 }
1656
1657 if ((*string = kssl_calloc(1, strlen(text) + 1)) == NULL)
1658 return KSSL_CTX_ERR;
1659 else
1660 strcpy(*string, text);
1661
1662 return KSSL_CTX_OK;
1663 }
1664
1665 /*
1666 * Copy the Kerberos session key from a (krb5_keyblock *) to a kssl_ctx
1667 * struct. Clear kssl_ctx->key if Kerberos session key is NULL.
1668 */
1669 krb5_error_code kssl_ctx_setkey(KSSL_CTX *kssl_ctx, krb5_keyblock *session)
1670 {
1671 int length;
1672 krb5_enctype enctype;
1673 krb5_octet FAR *contents = NULL;
1674
1675 if (!kssl_ctx)
1676 return KSSL_CTX_ERR;
1677
1678 if (kssl_ctx->key) {
1679 OPENSSL_cleanse(kssl_ctx->key, kssl_ctx->length);
1680 kssl_free(kssl_ctx->key);
1681 }
1682
1683 if (session) {
1684
1685 # ifdef KRB5_HEIMDAL
1686 length = session->keyvalue->length;
1687 enctype = session->keytype;
1688 contents = session->keyvalue->contents;
1689 # else
1690 length = session->length;
1691 enctype = session->enctype;
1692 contents = session->contents;
1693 # endif
1694 kssl_ctx->enctype = enctype;
1695 kssl_ctx->length = length;
1696 } else {
1697 kssl_ctx->enctype = ENCTYPE_UNKNOWN;
1698 kssl_ctx->length = 0;
1699 return KSSL_CTX_OK;
1700 }
1701
1702 if ((kssl_ctx->key =
1703 (krb5_octet FAR *)kssl_calloc(1, kssl_ctx->length)) == NULL) {
1704 kssl_ctx->length = 0;
1705 return KSSL_CTX_ERR;
1706 } else
1707 memcpy(kssl_ctx->key, contents, length);
1708
1709 return KSSL_CTX_OK;
1710 }
1711
1712 /*
1713 * Display contents of kssl_ctx struct
1714 */
1715 void kssl_ctx_show(KSSL_CTX *kssl_ctx)
1716 {
1717 int i;
1718
1719 printf("kssl_ctx: ");
1720 if (kssl_ctx == NULL) {
1721 printf("NULL\n");
1722 return;
1723 } else
1724 printf("%p\n", (void *)kssl_ctx);
1725
1726 printf("\tservice:\t%s\n",
1727 (kssl_ctx->service_name) ? kssl_ctx->service_name : "NULL");
1728 printf("\tclient:\t%s\n",
1729 (kssl_ctx->client_princ) ? kssl_ctx->client_princ : "NULL");
1730 printf("\tserver:\t%s\n",
1731 (kssl_ctx->service_host) ? kssl_ctx->service_host : "NULL");
1732 printf("\tkeytab:\t%s\n",
1733 (kssl_ctx->keytab_file) ? kssl_ctx->keytab_file : "NULL");
1734 printf("\tkey [%d:%d]:\t", kssl_ctx->enctype, kssl_ctx->length);
1735
1736 for (i = 0; i < kssl_ctx->length && kssl_ctx->key; i++) {
1737 printf("%02x", kssl_ctx->key[i]);
1738 }
1739 printf("\n");
1740 return;
1741 }
1742
1743 int kssl_keytab_is_available(KSSL_CTX *kssl_ctx)
1744 {
1745 krb5_context krb5context = NULL;
1746 krb5_keytab krb5keytab = NULL;
1747 krb5_keytab_entry entry;
1748 krb5_principal princ = NULL;
1749 krb5_error_code krb5rc = KRB5KRB_ERR_GENERIC;
1750 int rc = 0;
1751
1752 if ((krb5rc = krb5_init_context(&krb5context)))
1753 return (0);
1754
1755 /*
1756 * kssl_ctx->keytab_file == NULL ==> use Kerberos default
1757 */
1758 if (kssl_ctx->keytab_file) {
1759 krb5rc = krb5_kt_resolve(krb5context, kssl_ctx->keytab_file,
1760 &krb5keytab);
1761 if (krb5rc)
1762 goto exit;
1763 } else {
1764 krb5rc = krb5_kt_default(krb5context, &krb5keytab);
1765 if (krb5rc)
1766 goto exit;
1767 }
1768
1769 /* the host key we are looking for */
1770 krb5rc = krb5_sname_to_principal(krb5context, NULL,
1771 kssl_ctx->
1772 service_name ? kssl_ctx->service_name :
1773 KRB5SVC, KRB5_NT_SRV_HST, &princ);
1774
1775 if (krb5rc)
1776 goto exit;
1777
1778 krb5rc = krb5_kt_get_entry(krb5context, krb5keytab, princ,
1779 /* IGNORE_VNO */
1780 0,
1781 /* IGNORE_ENCTYPE */
1782 0, &entry);
1783 if (krb5rc == KRB5_KT_NOTFOUND) {
1784 rc = 1;
1785 goto exit;
1786 } else if (krb5rc)
1787 goto exit;
1788
1789 krb5_kt_free_entry(krb5context, &entry);
1790 rc = 1;
1791
1792 exit:
1793 if (krb5keytab)
1794 krb5_kt_close(krb5context, krb5keytab);
1795 if (princ)
1796 krb5_free_principal(krb5context, princ);
1797 if (krb5context)
1798 krb5_free_context(krb5context);
1799 return (rc);
1800 }
1801
1802 int kssl_tgt_is_available(KSSL_CTX *kssl_ctx)
1803 {
1804 krb5_error_code krb5rc = KRB5KRB_ERR_GENERIC;
1805 krb5_context krb5context = NULL;
1806 krb5_ccache krb5ccdef = NULL;
1807 krb5_creds krb5creds, *krb5credsp = NULL;
1808 int rc = 0;
1809
1810 memset((char *)&krb5creds, 0, sizeof(krb5creds));
1811
1812 if (!kssl_ctx)
1813 return (0);
1814
1815 if (!kssl_ctx->service_host)
1816 return (0);
1817
1818 if ((krb5rc = krb5_init_context(&krb5context)) != 0)
1819 goto err;
1820
1821 if ((krb5rc = krb5_sname_to_principal(krb5context,
1822 kssl_ctx->service_host,
1823 (kssl_ctx->service_name) ?
1824 kssl_ctx->service_name : KRB5SVC,
1825 KRB5_NT_SRV_HST,
1826 &krb5creds.server)) != 0)
1827 goto err;
1828
1829 if ((krb5rc = krb5_cc_default(krb5context, &krb5ccdef)) != 0)
1830 goto err;
1831
1832 if ((krb5rc = krb5_cc_get_principal(krb5context, krb5ccdef,
1833 &krb5creds.client)) != 0)
1834 goto err;
1835
1836 if ((krb5rc = krb5_get_credentials(krb5context, 0, krb5ccdef,
1837 &krb5creds, &krb5credsp)) != 0)
1838 goto err;
1839
1840 rc = 1;
1841
1842 err:
1843 # ifdef KSSL_DEBUG
1844 kssl_ctx_show(kssl_ctx);
1845 # endif /* KSSL_DEBUG */
1846
1847 if (krb5creds.client)
1848 krb5_free_principal(krb5context, krb5creds.client);
1849 if (krb5creds.server)
1850 krb5_free_principal(krb5context, krb5creds.server);
1851 if (krb5context)
1852 krb5_free_context(krb5context);
1853 return (rc);
1854 }
1855
1856 # if !defined(OPENSSL_SYS_WINDOWS) && !defined(OPENSSL_SYS_WIN32)
1857 void kssl_krb5_free_data_contents(krb5_context context, krb5_data *data)
1858 {
1859 # ifdef KRB5_HEIMDAL
1860 data->length = 0;
1861 if (data->data)
1862 free(data->data);
1863 # elif defined(KRB5_MIT_OLD11)
1864 if (data->data) {
1865 krb5_xfree(data->data);
1866 data->data = 0;
1867 }
1868 # else
1869 krb5_free_data_contents(NULL, data);
1870 # endif
1871 }
1872 # endif
1873 /* !OPENSSL_SYS_WINDOWS && !OPENSSL_SYS_WIN32 */
1874
1875 /*
1876 * Given pointers to KerberosTime and struct tm structs, convert the
1877 * KerberosTime string to struct tm. Note that KerberosTime is a
1878 * ASN1_GENERALIZEDTIME value, constrained to GMT with no fractional seconds
1879 * as defined in RFC 1510. Return pointer to the (partially) filled in
1880 * struct tm on success, return NULL on failure.
1881 */
1882 static struct tm *k_gmtime(ASN1_GENERALIZEDTIME *gtime, struct tm *k_tm)
1883 {
1884 char c, *p;
1885
1886 if (!k_tm)
1887 return NULL;
1888 if (gtime == NULL || gtime->length < 14)
1889 return NULL;
1890 if (gtime->data == NULL)
1891 return NULL;
1892
1893 p = (char *)&gtime->data[14];
1894
1895 c = *p;
1896 *p = '\0';
1897 p -= 2;
1898 k_tm->tm_sec = atoi(p);
1899 *(p + 2) = c;
1900 c = *p;
1901 *p = '\0';
1902 p -= 2;
1903 k_tm->tm_min = atoi(p);
1904 *(p + 2) = c;
1905 c = *p;
1906 *p = '\0';
1907 p -= 2;
1908 k_tm->tm_hour = atoi(p);
1909 *(p + 2) = c;
1910 c = *p;
1911 *p = '\0';
1912 p -= 2;
1913 k_tm->tm_mday = atoi(p);
1914 *(p + 2) = c;
1915 c = *p;
1916 *p = '\0';
1917 p -= 2;
1918 k_tm->tm_mon = atoi(p) - 1;
1919 *(p + 2) = c;
1920 c = *p;
1921 *p = '\0';
1922 p -= 4;
1923 k_tm->tm_year = atoi(p) - 1900;
1924 *(p + 4) = c;
1925
1926 return k_tm;
1927 }
1928
1929 /*
1930 * Helper function for kssl_validate_times(). We need context->clockskew,
1931 * but krb5_context is an opaque struct. So we try to sneek the clockskew
1932 * out through the replay cache. If that fails just return a likely default
1933 * (300 seconds).
1934 */
1935 static krb5_deltat get_rc_clockskew(krb5_context context)
1936 {
1937 krb5_rcache rc;
1938 krb5_deltat clockskew;
1939
1940 if (krb5_rc_default(context, &rc))
1941 return KSSL_CLOCKSKEW;
1942 if (krb5_rc_initialize(context, rc, 0))
1943 return KSSL_CLOCKSKEW;
1944 if (krb5_rc_get_lifespan(context, rc, &clockskew)) {
1945 clockskew = KSSL_CLOCKSKEW;
1946 }
1947 (void)krb5_rc_destroy(context, rc);
1948 return clockskew;
1949 }
1950
1951 /*
1952 * kssl_validate_times() combines (and more importantly exposes) the MIT KRB5
1953 * internal function krb5_validate_times() and the in_clock_skew() macro.
1954 * The authenticator client time is checked to be within clockskew secs of
1955 * the current time and the current time is checked to be within the ticket
1956 * start and expire times. Either check may be omitted by supplying a NULL
1957 * value. Returns 0 for valid times, SSL_R_KRB5* error codes otherwise. See
1958 * Also: (Kerberos source)/krb5/lib/krb5/krb/valid_times.c 20010420 VRS
1959 */
1960 krb5_error_code kssl_validate_times(krb5_timestamp atime,
1961 krb5_ticket_times *ttimes)
1962 {
1963 krb5_deltat skew;
1964 krb5_timestamp start, now;
1965 krb5_error_code rc;
1966 krb5_context context;
1967
1968 if ((rc = krb5_init_context(&context)))
1969 return SSL_R_KRB5_S_BAD_TICKET;
1970 skew = get_rc_clockskew(context);
1971 if ((rc = krb5_timeofday(context, &now)))
1972 return SSL_R_KRB5_S_BAD_TICKET;
1973 krb5_free_context(context);
1974
1975 if (atime && labs(atime - now) >= skew)
1976 return SSL_R_KRB5_S_TKT_SKEW;
1977
1978 if (!ttimes)
1979 return 0;
1980
1981 start = (ttimes->starttime != 0) ? ttimes->starttime : ttimes->authtime;
1982 if (start - now > skew)
1983 return SSL_R_KRB5_S_TKT_NYV;
1984 if ((now - ttimes->endtime) > skew)
1985 return SSL_R_KRB5_S_TKT_EXPIRED;
1986
1987 # ifdef KSSL_DEBUG
1988 fprintf(stderr, "kssl_validate_times: %d |<- | %d - %d | < %d ->| %d\n",
1989 start, atime, now, skew, ttimes->endtime);
1990 # endif /* KSSL_DEBUG */
1991
1992 return 0;
1993 }
1994
1995 /*
1996 * Decode and decrypt given DER-encoded authenticator, then pass
1997 * authenticator ctime back in *atimep (or 0 if time unavailable). Returns
1998 * krb5_error_code and kssl_err on error. A NULL authenticator
1999 * (authentp->length == 0) is not considered an error. Note that
2000 * kssl_check_authent() makes use of the KRB5 session key; you must call
2001 * kssl_sget_tkt() to get the key before calling this routine.
2002 */
2003 krb5_error_code kssl_check_authent(
2004 /*
2005 * IN
2006 */ KSSL_CTX *kssl_ctx,
2007 /*
2008 * IN
2009 */ krb5_data *authentp,
2010 /*
2011 * OUT
2012 */ krb5_timestamp *atimep,
2013 /*
2014 * OUT
2015 */ KSSL_ERR *kssl_err)
2016 {
2017 krb5_error_code krb5rc = 0;
2018 KRB5_ENCDATA *dec_authent = NULL;
2019 KRB5_AUTHENTBODY *auth = NULL;
2020 krb5_enctype enctype;
2021 EVP_CIPHER_CTX ciph_ctx;
2022 const EVP_CIPHER *enc = NULL;
2023 unsigned char iv[EVP_MAX_IV_LENGTH];
2024 const unsigned char *p;
2025 unsigned char *unenc_authent;
2026 int outl, unencbufsize;
2027 struct tm tm_time, *tm_l, *tm_g;
2028 time_t now, tl, tg, tr, tz_offset;
2029
2030 EVP_CIPHER_CTX_init(&ciph_ctx);
2031 *atimep = 0;
2032 kssl_err_set(kssl_err, 0, "");
2033
2034 # ifndef KRB5CHECKAUTH
2035 authentp = NULL;
2036 # else
2037 # if KRB5CHECKAUTH == 0
2038 authentp = NULL;
2039 # endif
2040 # endif /* KRB5CHECKAUTH */
2041
2042 if (authentp == NULL || authentp->length == 0)
2043 return 0;
2044
2045 # ifdef KSSL_DEBUG
2046 {
2047 unsigned int ui;
2048 fprintf(stderr, "kssl_check_authent: authenticator[%d]:\n",
2049 authentp->length);
2050 p = authentp->data;
2051 for (ui = 0; ui < authentp->length; ui++)
2052 fprintf(stderr, "%02x ", p[ui]);
2053 fprintf(stderr, "\n");
2054 }
2055 # endif /* KSSL_DEBUG */
2056
2057 unencbufsize = 2 * authentp->length;
2058 if ((unenc_authent = calloc(1, unencbufsize)) == NULL) {
2059 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
2060 "Unable to allocate authenticator buffer.\n");
2061 krb5rc = KRB5KRB_ERR_GENERIC;
2062 goto err;
2063 }
2064
2065 p = (unsigned char *)authentp->data;
2066 if ((dec_authent = d2i_KRB5_ENCDATA(NULL, &p,
2067 (long)authentp->length)) == NULL) {
2068 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
2069 "Error decoding authenticator.\n");
2070 krb5rc = KRB5KRB_AP_ERR_BAD_INTEGRITY;
2071 goto err;
2072 }
2073
2074 enctype = dec_authent->etype->data[0]; /* should = kssl_ctx->enctype */
2075 # if !defined(KRB5_MIT_OLD11)
2076 switch (enctype) {
2077 case ENCTYPE_DES3_CBC_SHA1: /* EVP_des_ede3_cbc(); */
2078 case ENCTYPE_DES3_CBC_SHA:
2079 case ENCTYPE_DES3_CBC_RAW:
2080 krb5rc = 0; /* Skip, can't handle derived keys */
2081 goto err;
2082 }
2083 # endif
2084 enc = kssl_map_enc(enctype);
2085 memset(iv, 0, sizeof iv); /* per RFC 1510 */
2086
2087 if (enc == NULL) {
2088 /*
2089 * Disable kssl_check_authent for ENCTYPE_DES3_CBC_SHA1. This
2090 * enctype indicates the authenticator was encrypted using key-usage
2091 * derived keys which openssl cannot decrypt.
2092 */
2093 goto err;
2094 }
2095
2096 if (!EVP_CipherInit(&ciph_ctx, enc, kssl_ctx->key, iv, 0)) {
2097 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
2098 "EVP_CipherInit error decrypting authenticator.\n");
2099 krb5rc = KRB5KRB_AP_ERR_BAD_INTEGRITY;
2100 goto err;
2101 }
2102 outl = dec_authent->cipher->length;
2103 if (!EVP_Cipher
2104 (&ciph_ctx, unenc_authent, dec_authent->cipher->data, outl)) {
2105 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
2106 "EVP_Cipher error decrypting authenticator.\n");
2107 krb5rc = KRB5KRB_AP_ERR_BAD_INTEGRITY;
2108 goto err;
2109 }
2110 EVP_CIPHER_CTX_cleanup(&ciph_ctx);
2111
2112 # ifdef KSSL_DEBUG
2113 {
2114 int padl;
2115 fprintf(stderr, "kssl_check_authent: decrypted authenticator[%d] =\n",
2116 outl);
2117 for (padl = 0; padl < outl; padl++)
2118 fprintf(stderr, "%02x ", unenc_authent[padl]);
2119 fprintf(stderr, "\n");
2120 }
2121 # endif /* KSSL_DEBUG */
2122
2123 if ((p = kssl_skip_confound(enctype, unenc_authent)) == NULL) {
2124 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
2125 "confounded by authenticator.\n");
2126 krb5rc = KRB5KRB_AP_ERR_BAD_INTEGRITY;
2127 goto err;
2128 }
2129 outl -= p - unenc_authent;
2130
2131 if ((auth = (KRB5_AUTHENTBODY *)d2i_KRB5_AUTHENT(NULL, &p,
2132 (long)outl)) == NULL) {
2133 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
2134 "Error decoding authenticator body.\n");
2135 krb5rc = KRB5KRB_AP_ERR_BAD_INTEGRITY;
2136 goto err;
2137 }
2138
2139 memset(&tm_time, 0, sizeof(struct tm));
2140 if (k_gmtime(auth->ctime, &tm_time) &&
2141 ((tr = mktime(&tm_time)) != (time_t)(-1))) {
2142 now = time(&now);
2143 tm_l = localtime(&now);
2144 tl = mktime(tm_l);
2145 tm_g = gmtime(&now);
2146 tg = mktime(tm_g);
2147 tz_offset = tg - tl;
2148
2149 *atimep = (krb5_timestamp)(tr - tz_offset);
2150 }
2151 # ifdef KSSL_DEBUG
2152 fprintf(stderr, "kssl_check_authent: returns %d for client time ",
2153 *atimep);
2154 if (auth && auth->ctime && auth->ctime->length && auth->ctime->data)
2155 fprintf(stderr, "%.*s\n", auth->ctime->length, auth->ctime->data);
2156 else
2157 fprintf(stderr, "NULL\n");
2158 # endif /* KSSL_DEBUG */
2159
2160 err:
2161 if (auth)
2162 KRB5_AUTHENT_free((KRB5_AUTHENT *) auth);
2163 if (dec_authent)
2164 KRB5_ENCDATA_free(dec_authent);
2165 if (unenc_authent)
2166 free(unenc_authent);
2167 EVP_CIPHER_CTX_cleanup(&ciph_ctx);
2168 return krb5rc;
2169 }
2170
2171 /*
2172 * Replaces krb5_build_principal_ext(), with varargs length == 2 (svc, host),
2173 * because I don't know how to stub varargs. Returns krb5_error_code ==
2174 * ENOMEM on alloc error, otherwise passes back newly constructed principal,
2175 * which should be freed by caller.
2176 */
2177 krb5_error_code kssl_build_principal_2(
2178 /*
2179 * UPDATE
2180 */ krb5_context context,
2181 /*
2182 * OUT
2183 */ krb5_principal *princ,
2184 /*
2185 * IN
2186 */ int rlen, const char *realm,
2187 /*
2188 * IN
2189 */ int slen, const char *svc,
2190 /*
2191 * IN
2192 */ int hlen, const char *host)
2193 {
2194 krb5_data *p_data = NULL;
2195 krb5_principal new_p = NULL;
2196 char *new_r = NULL;
2197
2198 if ((p_data = (krb5_data *)calloc(2, sizeof(krb5_data))) == NULL ||
2199 (new_p = (krb5_principal)calloc(1, sizeof(krb5_principal_data)))
2200 == NULL)
2201 goto err;
2202 new_p->length = 2;
2203 new_p->data = p_data;
2204
2205 if ((new_r = calloc(1, rlen + 1)) == NULL)
2206 goto err;
2207 memcpy(new_r, realm, rlen);
2208 krb5_princ_set_realm_length(context, new_p, rlen);
2209 krb5_princ_set_realm_data(context, new_p, new_r);
2210
2211 if ((new_p->data[0].data = calloc(1, slen + 1)) == NULL)
2212 goto err;
2213 memcpy(new_p->data[0].data, svc, slen);
2214 new_p->data[0].length = slen;
2215
2216 if ((new_p->data[1].data = calloc(1, hlen + 1)) == NULL)
2217 goto err;
2218 memcpy(new_p->data[1].data, host, hlen);
2219 new_p->data[1].length = hlen;
2220
2221 krb5_princ_type(context, new_p) = KRB5_NT_UNKNOWN;
2222 *princ = new_p;
2223 return 0;
2224
2225 err:
2226 if (new_p && new_p[0].data)
2227 free(new_p[0].data);
2228 if (new_p && new_p[1].data)
2229 free(new_p[1].data);
2230 if (new_p)
2231 free(new_p);
2232 if (new_r)
2233 free(new_r);
2234 return ENOMEM;
2235 }
2236
2237 void SSL_set0_kssl_ctx(SSL *s, KSSL_CTX *kctx)
2238 {
2239 s->kssl_ctx = kctx;
2240 }
2241
2242 KSSL_CTX *SSL_get0_kssl_ctx(SSL *s)
2243 {
2244 return s->kssl_ctx;
2245 }
2246
2247 char *kssl_ctx_get0_client_princ(KSSL_CTX *kctx)
2248 {
2249 if (kctx)
2250 return kctx->client_princ;
2251 return NULL;
2252 }
2253
2254 #else /* !OPENSSL_NO_KRB5 */
2255
2256 # if defined(PEDANTIC) || defined(OPENSSL_SYS_VMS)
2257 static void *dummy = &dummy;
2258 # endif
2259
2260 #endif /* !OPENSSL_NO_KRB5 */
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