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