1 /* ssl/kssl.c -*- mode: C; c-file-style: "eay" -*- */
2 /* Written by Vern Staats <staatsvr@asc.hpc.mil> for the OpenSSL project 2000.
4 /* ====================================================================
5 * Copyright (c) 2000 The OpenSSL Project. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
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
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/)"
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.
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.
33 * 6. Redistributions of any form whatsoever must retain the following
35 * "This product includes software developed by the OpenSSL Project
36 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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 * ====================================================================
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).
59 /* ssl/kssl.c -- Routines to support (& debug) Kerberos5 auth for openssl
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.
69 #include <openssl/opensslconf.h>
70 #ifndef OPENSSL_NO_KRB5
71 #define _XOPEN_SOURCE /* glibc2 needs this to declare strptime() */
75 #include <openssl/ssl.h>
76 #include <openssl/evp.h>
77 #include <openssl/objects.h>
78 #include <openssl/krb5_asn.h>
81 * When OpenSSL is built on Windows, we do not want to require that
82 * the Kerberos DLLs be available in order for the OpenSSL DLLs to
83 * work. Therefore, all Kerberos routines are loaded at run time
84 * and we do not link to a .LIB file.
87 #if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_WIN32)
89 * The purpose of the following pre-processor statements is to provide
90 * compatibility with different releases of MIT Kerberos for Windows.
91 * All versions up to 1.2 used macros. But macros do not allow for
92 * a binary compatible interface for DLLs. Therefore, all macros are
93 * being replaced by function calls. The following code will allow
94 * an OpenSSL DLL built on Windows to work whether or not the macro
95 * or function form of the routines are utilized.
97 #ifdef krb5_cc_get_principal
98 #define NO_DEF_KRB5_CCACHE
99 #undef krb5_cc_get_principal
101 #define krb5_cc_get_principal kssl_krb5_cc_get_principal
103 #define krb5_free_data_contents kssl_krb5_free_data_contents
104 #define krb5_free_context kssl_krb5_free_context
105 #define krb5_auth_con_free kssl_krb5_auth_con_free
106 #define krb5_free_principal kssl_krb5_free_principal
107 #define krb5_mk_req_extended kssl_krb5_mk_req_extended
108 #define krb5_get_credentials kssl_krb5_get_credentials
109 #define krb5_cc_default kssl_krb5_cc_default
110 #define krb5_sname_to_principal kssl_krb5_sname_to_principal
111 #define krb5_init_context kssl_krb5_init_context
112 #define krb5_free_ticket kssl_krb5_free_ticket
113 #define krb5_rd_req kssl_krb5_rd_req
114 #define krb5_kt_default kssl_krb5_kt_default
115 #define krb5_kt_resolve kssl_krb5_kt_resolve
116 #define krb5_auth_con_init kssl_krb5_auth_con_init
118 #define krb5_principal_compare kssl_krb5_principal_compare
119 /* macro #define krb5_kt_get_entry kssl_krb5_kt_get_entry */
120 #define krb5_decrypt_tkt_part kssl_krb5_decrypt_tkt_part
121 #define krb5_timeofday kssl_krb5_timeofday
122 #define krb5_rc_default kssl_krb5_rc_default
123 #define krb5_rc_initialize kssl_krb5_rc_initialize
124 #define krb5_rc_get_lifespan kssl_krb5_rc_get_lifespan
125 #define krb5_rc_destroy kssl_krb5_rc_destroy
126 #define valid_cksumtype kssl_valid_cksumtype
127 #define krb5_checksum_size kssl_krb5_checksum_size
128 #define krb5_kt_free_entry kssl_krb5_kt_free_entry
129 #define krb5_auth_con_setrcache kssl_krb5_auth_con_setrcache
130 #define krb5_auth_con_getrcache kssl_krb5_auth_con_getrcache
131 #define krb5_get_server_rcache kssl_krb5_get_server_rcache
133 /* Prototypes for built in stubs */
134 void kssl_krb5_free_data_contents(krb5_context, krb5_data *);
135 void kssl_krb5_free_principal(krb5_context, krb5_principal );
136 krb5_error_code kssl_krb5_kt_resolve(krb5_context,
139 krb5_error_code kssl_krb5_kt_default(krb5_context,
141 krb5_error_code kssl_krb5_free_ticket(krb5_context, krb5_ticket *);
142 krb5_error_code kssl_krb5_rd_req(krb5_context, krb5_auth_context *,
143 krb5_const krb5_data *,
144 krb5_const_principal, krb5_keytab,
145 krb5_flags *,krb5_ticket **);
147 krb5_boolean kssl_krb5_principal_compare(krb5_context, krb5_const_principal,
148 krb5_const_principal);
149 krb5_error_code kssl_krb5_mk_req_extended(krb5_context,
151 krb5_const krb5_flags,
155 krb5_error_code kssl_krb5_init_context(krb5_context *);
156 void kssl_krb5_free_context(krb5_context);
157 krb5_error_code kssl_krb5_cc_default(krb5_context,krb5_ccache *);
158 krb5_error_code kssl_krb5_sname_to_principal(krb5_context,
163 krb5_error_code kssl_krb5_get_credentials(krb5_context,
164 krb5_const krb5_flags,
168 krb5_error_code kssl_krb5_auth_con_init(krb5_context,
169 krb5_auth_context *);
170 krb5_error_code kssl_krb5_cc_get_principal(krb5_context context,
172 krb5_principal *principal);
173 krb5_error_code kssl_krb5_auth_con_free(krb5_context,krb5_auth_context);
174 size_t kssl_krb5_checksum_size(krb5_context context,krb5_cksumtype ctype);
175 krb5_boolean kssl_valid_cksumtype(krb5_cksumtype ctype);
176 krb5_error_code krb5_kt_free_entry(krb5_context,krb5_keytab_entry FAR * );
177 krb5_error_code kssl_krb5_auth_con_setrcache(krb5_context,
180 krb5_error_code kssl_krb5_get_server_rcache(krb5_context,
181 krb5_const krb5_data *,
183 krb5_error_code kssl_krb5_auth_con_getrcache(krb5_context,
187 /* Function pointers (almost all Kerberos functions are _stdcall) */
188 static void (_stdcall *p_krb5_free_data_contents)(krb5_context, krb5_data *)
190 static void (_stdcall *p_krb5_free_principal)(krb5_context, krb5_principal )
192 static krb5_error_code(_stdcall *p_krb5_kt_resolve)
193 (krb5_context, krb5_const char *, krb5_keytab *)=NULL;
194 static krb5_error_code (_stdcall *p_krb5_kt_default)(krb5_context,
196 static krb5_error_code (_stdcall *p_krb5_free_ticket)(krb5_context,
198 static krb5_error_code (_stdcall *p_krb5_rd_req)(krb5_context,
200 krb5_const krb5_data *,
201 krb5_const_principal,
202 krb5_keytab, krb5_flags *,
203 krb5_ticket **)=NULL;
204 static krb5_error_code (_stdcall *p_krb5_mk_req_extended)
205 (krb5_context, krb5_auth_context *,
206 krb5_const krb5_flags, krb5_data *, krb5_creds *,
208 static krb5_error_code (_stdcall *p_krb5_init_context)(krb5_context *)=NULL;
209 static void (_stdcall *p_krb5_free_context)(krb5_context)=NULL;
210 static krb5_error_code (_stdcall *p_krb5_cc_default)(krb5_context,
212 static krb5_error_code (_stdcall *p_krb5_sname_to_principal)
213 (krb5_context, krb5_const char *, krb5_const char *,
214 krb5_int32, krb5_principal *)=NULL;
215 static krb5_error_code (_stdcall *p_krb5_get_credentials)
216 (krb5_context, krb5_const krb5_flags, krb5_ccache,
217 krb5_creds *, krb5_creds **)=NULL;
218 static krb5_error_code (_stdcall *p_krb5_auth_con_init)
219 (krb5_context, krb5_auth_context *)=NULL;
220 static krb5_error_code (_stdcall *p_krb5_cc_get_principal)
221 (krb5_context context, krb5_ccache cache,
222 krb5_principal *principal)=NULL;
223 static krb5_error_code (_stdcall *p_krb5_auth_con_free)
224 (krb5_context, krb5_auth_context)=NULL;
225 static krb5_error_code (_stdcall *p_krb5_decrypt_tkt_part)
226 (krb5_context, krb5_const krb5_keyblock *,
228 static krb5_error_code (_stdcall *p_krb5_timeofday)
229 (krb5_context context, krb5_int32 *timeret)=NULL;
230 static krb5_error_code (_stdcall *p_krb5_rc_default)
231 (krb5_context context, krb5_rcache *rc)=NULL;
232 static krb5_error_code (_stdcall *p_krb5_rc_initialize)
233 (krb5_context context, krb5_rcache rc,
234 krb5_deltat lifespan)=NULL;
235 static krb5_error_code (_stdcall *p_krb5_rc_get_lifespan)
236 (krb5_context context, krb5_rcache rc,
237 krb5_deltat *lifespan)=NULL;
238 static krb5_error_code (_stdcall *p_krb5_rc_destroy)
239 (krb5_context context, krb5_rcache rc)=NULL;
240 static krb5_boolean (_stdcall *p_krb5_principal_compare)
241 (krb5_context, krb5_const_principal, krb5_const_principal)=NULL;
242 static size_t (_stdcall *p_krb5_checksum_size)(krb5_context context,krb5_cksumtype ctype)=NULL;
243 static krb5_boolean (_stdcall *p_valid_cksumtype)(krb5_cksumtype ctype)=NULL;
244 static krb5_error_code (_stdcall *p_krb5_kt_free_entry)
245 (krb5_context,krb5_keytab_entry * )=NULL;
246 static krb5_error_code (_stdcall * p_krb5_auth_con_setrcache)(krb5_context,
249 static krb5_error_code (_stdcall * p_krb5_get_server_rcache)(krb5_context,
250 krb5_const krb5_data *,
252 static krb5_error_code (* p_krb5_auth_con_getrcache)(krb5_context,
255 static int krb5_loaded = 0; /* only attempt to initialize func ptrs once */
257 /* Function to Load the Kerberos 5 DLL and initialize function pointers */
264 hKRB5_32 = LoadLibrary("KRB5_32");
268 (FARPROC) p_krb5_free_data_contents =
269 GetProcAddress( hKRB5_32, "krb5_free_data_contents" );
270 (FARPROC) p_krb5_free_context =
271 GetProcAddress( hKRB5_32, "krb5_free_context" );
272 (FARPROC) p_krb5_auth_con_free =
273 GetProcAddress( hKRB5_32, "krb5_auth_con_free" );
274 (FARPROC) p_krb5_free_principal =
275 GetProcAddress( hKRB5_32, "krb5_free_principal" );
276 (FARPROC) p_krb5_mk_req_extended =
277 GetProcAddress( hKRB5_32, "krb5_mk_req_extended" );
278 (FARPROC) p_krb5_get_credentials =
279 GetProcAddress( hKRB5_32, "krb5_get_credentials" );
280 (FARPROC) p_krb5_cc_get_principal =
281 GetProcAddress( hKRB5_32, "krb5_cc_get_principal" );
282 (FARPROC) p_krb5_cc_default =
283 GetProcAddress( hKRB5_32, "krb5_cc_default" );
284 (FARPROC) p_krb5_sname_to_principal =
285 GetProcAddress( hKRB5_32, "krb5_sname_to_principal" );
286 (FARPROC) p_krb5_init_context =
287 GetProcAddress( hKRB5_32, "krb5_init_context" );
288 (FARPROC) p_krb5_free_ticket =
289 GetProcAddress( hKRB5_32, "krb5_free_ticket" );
290 (FARPROC) p_krb5_rd_req =
291 GetProcAddress( hKRB5_32, "krb5_rd_req" );
292 (FARPROC) p_krb5_principal_compare =
293 GetProcAddress( hKRB5_32, "krb5_principal_compare" );
294 (FARPROC) p_krb5_decrypt_tkt_part =
295 GetProcAddress( hKRB5_32, "krb5_decrypt_tkt_part" );
296 (FARPROC) p_krb5_timeofday =
297 GetProcAddress( hKRB5_32, "krb5_timeofday" );
298 (FARPROC) p_krb5_rc_default =
299 GetProcAddress( hKRB5_32, "krb5_rc_default" );
300 (FARPROC) p_krb5_rc_initialize =
301 GetProcAddress( hKRB5_32, "krb5_rc_initialize" );
302 (FARPROC) p_krb5_rc_get_lifespan =
303 GetProcAddress( hKRB5_32, "krb5_rc_get_lifespan" );
304 (FARPROC) p_krb5_rc_destroy =
305 GetProcAddress( hKRB5_32, "krb5_rc_destroy" );
306 (FARPROC) p_krb5_kt_default =
307 GetProcAddress( hKRB5_32, "krb5_kt_default" );
308 (FARPROC) p_krb5_kt_resolve =
309 GetProcAddress( hKRB5_32, "krb5_kt_resolve" );
310 (FARPROC) p_krb5_auth_con_init =
311 GetProcAddress( hKRB5_32, "krb5_auth_con_init" );
312 (FARPROC) p_valid_cksumtype =
313 GetProcAddress( hKRB5_32, "valid_cksumtype" );
314 (FARPROC) p_krb5_checksum_size =
315 GetProcAddress( hKRB5_32, "krb5_checksum_size" );
316 (FARPROC) p_krb5_kt_free_entry =
317 GetProcAddress( hKRB5_32, "krb5_kt_free_entry" );
318 (FARPROC) p_krb5_auth_con_setrcache =
319 GetProcAddress( hKRB5_32, "krb5_auth_con_setrcache" );
320 (FARPROC) p_krb5_get_server_rcache =
321 GetProcAddress( hKRB5_32, "krb5_get_server_rcache" );
322 (FARPROC) p_krb5_auth_con_getrcache =
323 GetProcAddress( hKRB5_32, "krb5_auth_con_getrcache" );
326 /* Stubs for each function to be dynamicly loaded */
328 kssl_krb5_free_data_contents(krb5_context CO, krb5_data * data)
333 if ( p_krb5_free_data_contents )
334 p_krb5_free_data_contents(CO,data);
338 kssl_krb5_mk_req_extended (krb5_context CO,
339 krb5_auth_context * pACO,
340 krb5_const krb5_flags F,
348 if ( p_krb5_mk_req_extended )
349 return(p_krb5_mk_req_extended(CO,pACO,F,pD1,pC,pD2));
351 return KRB5KRB_ERR_GENERIC;
354 kssl_krb5_auth_con_init(krb5_context CO,
355 krb5_auth_context * pACO)
360 if ( p_krb5_auth_con_init )
361 return(p_krb5_auth_con_init(CO,pACO));
363 return KRB5KRB_ERR_GENERIC;
366 kssl_krb5_auth_con_free (krb5_context CO,
367 krb5_auth_context ACO)
372 if ( p_krb5_auth_con_free )
373 return(p_krb5_auth_con_free(CO,ACO));
375 return KRB5KRB_ERR_GENERIC;
378 kssl_krb5_get_credentials(krb5_context CO,
379 krb5_const krb5_flags F,
387 if ( p_krb5_get_credentials )
388 return(p_krb5_get_credentials(CO,F,CC,pCR,ppCR));
390 return KRB5KRB_ERR_GENERIC;
393 kssl_krb5_sname_to_principal(krb5_context CO,
394 krb5_const char * pC1,
395 krb5_const char * pC2,
397 krb5_principal * pPR)
402 if ( p_krb5_sname_to_principal )
403 return(p_krb5_sname_to_principal(CO,pC1,pC2,I,pPR));
405 return KRB5KRB_ERR_GENERIC;
409 kssl_krb5_cc_default(krb5_context CO,
415 if ( p_krb5_cc_default )
416 return(p_krb5_cc_default(CO,pCC));
418 return KRB5KRB_ERR_GENERIC;
422 kssl_krb5_init_context(krb5_context * pCO)
427 if ( p_krb5_init_context )
428 return(p_krb5_init_context(pCO));
430 return KRB5KRB_ERR_GENERIC;
434 kssl_krb5_free_context(krb5_context CO)
439 if ( p_krb5_free_context )
440 p_krb5_free_context(CO);
444 kssl_krb5_free_principal(krb5_context c, krb5_principal p)
449 if ( p_krb5_free_principal )
450 p_krb5_free_principal(c,p);
454 kssl_krb5_kt_resolve(krb5_context con,
455 krb5_const char * sz,
461 if ( p_krb5_kt_resolve )
462 return(p_krb5_kt_resolve(con,sz,kt));
464 return KRB5KRB_ERR_GENERIC;
468 kssl_krb5_kt_default(krb5_context con,
474 if ( p_krb5_kt_default )
475 return(p_krb5_kt_default(con,kt));
477 return KRB5KRB_ERR_GENERIC;
481 kssl_krb5_free_ticket(krb5_context con,
487 if ( p_krb5_free_ticket )
488 return(p_krb5_free_ticket(con,kt));
490 return KRB5KRB_ERR_GENERIC;
494 kssl_krb5_rd_req(krb5_context con, krb5_auth_context * pacon,
495 krb5_const krb5_data * data,
496 krb5_const_principal princ, krb5_keytab keytab,
497 krb5_flags * flags, krb5_ticket ** pptkt)
503 return(p_krb5_rd_req(con,pacon,data,princ,keytab,flags,pptkt));
505 return KRB5KRB_ERR_GENERIC;
509 krb5_principal_compare(krb5_context con, krb5_const_principal princ1,
510 krb5_const_principal princ2)
515 if ( p_krb5_principal_compare )
516 return(p_krb5_principal_compare(con,princ1,princ2));
518 return KRB5KRB_ERR_GENERIC;
522 krb5_decrypt_tkt_part(krb5_context con, krb5_const krb5_keyblock *keys,
528 if ( p_krb5_decrypt_tkt_part )
529 return(p_krb5_decrypt_tkt_part(con,keys,ticket));
531 return KRB5KRB_ERR_GENERIC;
535 krb5_timeofday(krb5_context con, krb5_int32 *timeret)
540 if ( p_krb5_timeofday )
541 return(p_krb5_timeofday(con,timeret));
543 return KRB5KRB_ERR_GENERIC;
547 krb5_rc_default(krb5_context con, krb5_rcache *rc)
552 if ( p_krb5_rc_default )
553 return(p_krb5_rc_default(con,rc));
555 return KRB5KRB_ERR_GENERIC;
559 krb5_rc_initialize(krb5_context con, krb5_rcache rc, krb5_deltat lifespan)
564 if ( p_krb5_rc_initialize )
565 return(p_krb5_rc_initialize(con, rc, lifespan));
567 return KRB5KRB_ERR_GENERIC;
571 krb5_rc_get_lifespan(krb5_context con, krb5_rcache rc, krb5_deltat *lifespanp)
576 if ( p_krb5_rc_get_lifespan )
577 return(p_krb5_rc_get_lifespan(con, rc, lifespanp));
579 return KRB5KRB_ERR_GENERIC;
583 krb5_rc_destroy(krb5_context con, krb5_rcache rc)
588 if ( p_krb5_rc_destroy )
589 return(p_krb5_rc_destroy(con, rc));
591 return KRB5KRB_ERR_GENERIC;
595 krb5_checksum_size(krb5_context context,krb5_cksumtype ctype)
600 if ( p_krb5_checksum_size )
601 return(p_krb5_checksum_size(context, ctype));
603 return KRB5KRB_ERR_GENERIC;
607 valid_cksumtype(krb5_cksumtype ctype)
612 if ( p_valid_cksumtype )
613 return(p_valid_cksumtype(ctype));
615 return KRB5KRB_ERR_GENERIC;
619 krb5_kt_free_entry(krb5_context con,krb5_keytab_entry * entry)
624 if ( p_krb5_kt_free_entry )
625 return(p_krb5_kt_free_entry(con,entry));
627 return KRB5KRB_ERR_GENERIC;
630 /* Structure definitions */
631 #ifndef NO_DEF_KRB5_CCACHE
633 #define krb5_x(ptr,args) ((ptr)?((*(ptr)) args):(abort(),1))
634 #define krb5_xc(ptr,args) ((ptr)?((*(ptr)) args):(abort(),(char*)0))
637 typedef krb5_pointer krb5_cc_cursor; /* cursor for sequential lookup */
639 typedef struct _krb5_ccache
642 struct _krb5_cc_ops FAR *ops;
646 typedef struct _krb5_cc_ops
650 char * (KRB5_CALLCONV *get_name)
651 (krb5_context, krb5_ccache);
652 krb5_error_code (KRB5_CALLCONV *resolve)
653 (krb5_context, krb5_ccache *, const char *);
654 krb5_error_code (KRB5_CALLCONV *gen_new)
655 (krb5_context, krb5_ccache *);
656 krb5_error_code (KRB5_CALLCONV *init)
657 (krb5_context, krb5_ccache, krb5_principal);
658 krb5_error_code (KRB5_CALLCONV *destroy)
659 (krb5_context, krb5_ccache);
660 krb5_error_code (KRB5_CALLCONV *close)
661 (krb5_context, krb5_ccache);
662 krb5_error_code (KRB5_CALLCONV *store)
663 (krb5_context, krb5_ccache, krb5_creds *);
664 krb5_error_code (KRB5_CALLCONV *retrieve)
665 (krb5_context, krb5_ccache,
666 krb5_flags, krb5_creds *, krb5_creds *);
667 krb5_error_code (KRB5_CALLCONV *get_princ)
668 (krb5_context, krb5_ccache, krb5_principal *);
669 krb5_error_code (KRB5_CALLCONV *get_first)
670 (krb5_context, krb5_ccache, krb5_cc_cursor *);
671 krb5_error_code (KRB5_CALLCONV *get_next)
672 (krb5_context, krb5_ccache,
673 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,
678 krb5_flags, krb5_creds *);
679 krb5_error_code (KRB5_CALLCONV *set_flags)
680 (krb5_context, krb5_ccache, krb5_flags);
682 #endif /* NO_DEF_KRB5_CCACHE */
685 kssl_krb5_cc_get_principal
686 (krb5_context context, krb5_ccache cache,
687 krb5_principal *principal)
689 if ( p_krb5_cc_get_principal )
690 return(p_krb5_cc_get_principal(context,cache,principal));
693 ((cache)->ops->get_princ,(context, cache, principal)));
697 kssl_krb5_auth_con_setrcache(krb5_context con, krb5_auth_context acon,
700 if ( p_krb5_auth_con_setrcache )
701 return(p_krb5_auth_con_setrcache(con,acon,rcache));
703 return KRB5KRB_ERR_GENERIC;
707 kssl_krb5_get_server_rcache(krb5_context con, krb5_const krb5_data * data,
708 krb5_rcache * rcache)
710 if ( p_krb5_get_server_rcache )
711 return(p_krb5_get_server_rcache(con,data,rcache));
713 return KRB5KRB_ERR_GENERIC;
717 kssl_krb5_auth_con_getrcache(krb5_context con, krb5_auth_context acon,
718 krb5_rcache * prcache)
720 if ( p_krb5_auth_con_getrcache )
721 return(p_krb5_auth_con_getrcache(con,acon, prcache));
723 return KRB5KRB_ERR_GENERIC;
725 #endif /* OPENSSL_SYS_WINDOWS || OPENSSL_SYS_WIN32 */
728 *kstring(char *string)
730 static char *null = "[NULL]";
732 return ((string == NULL)? null: string);
737 *knumber(int len, krb5_octet *contents)
739 static char buf[MAXKNUM+1];
742 BIO_snprintf(buf, MAXKNUM, "[%d] ", len);
744 for (i=0; i < len && MAXKNUM > strlen(buf)+3; i++)
746 BIO_snprintf(&buf[strlen(buf)], 3, "%02x", contents[i]);
753 /* Given KRB5 enctype (basically DES or 3DES), return
756 kssl_map_enc(krb5_enctype enctype)
760 case ENCTYPE_DES_CBC_CRC:
761 case ENCTYPE_DES_CBC_MD4:
762 case ENCTYPE_DES_CBC_MD5:
763 case ENCTYPE_DES_CBC_RAW:
764 #if ! defined(KRB5_MIT_OLD11)
765 case ENCTYPE_DES_HMAC_SHA1:
767 return (EVP_CIPHER *) EVP_des_cbc();
769 case ENCTYPE_DES3_CBC_SHA:
770 case ENCTYPE_DES3_CBC_RAW:
771 #if ! defined(KRB5_MIT_OLD11)
772 case ENCTYPE_DES3_CBC_SHA1:
774 return (EVP_CIPHER *) EVP_des_ede3_cbc();
776 default: return (EVP_CIPHER *) NULL;
782 /* Return true:1 if p "looks like" the start of the real authenticator
783 ** described in kssl_skip_confound() below. The ASN.1 pattern is
784 ** "62 xx 30 yy" (APPLICATION-2, SEQUENCE), where xx-yy =~ 2, and
785 ** xx and yy are possibly multi-byte length fields.
787 int kssl_test_confound(unsigned char *p)
792 if (*p++ != 0x62) return 0;
793 if (*p > 0x82) return 0;
795 case 0x82: p++; xx = (*p++ << 8); xx += *p++; break;
796 case 0x81: p++; xx = *p++; break;
798 default: xx = *p++; break;
800 if (*p++ != 0x30) return 0;
801 if (*p > 0x82) return 0;
803 case 0x82: p++; len+=2; yy = (*p++ << 8); yy += *p++; break;
804 case 0x81: p++; len++; yy = *p++; break;
806 default: yy = *p++; break;
809 return (xx - len == yy)? 1: 0;
812 /* Allocate, fill, and return cksumlens array of checksum lengths.
813 ** This array holds just the unique elements from the krb5_cksumarray[].
814 ** array[n] == 0 signals end of data.
816 ** The krb5_cksumarray[] was an internal variable that has since been
817 ** replaced by a more general method for storing the data. It should
818 ** not be used. Instead we use real API calls and make a guess for
819 ** what the highest assigned CKSUMTYPE_ constant is. As of 1.2.2
820 ** it is 0x000c (CKSUMTYPE_HMAC_SHA1_DES3). So we will use 0x0010.
822 int *populate_cksumlens(void)
824 int i, j, n = 0x0010+1;
825 static size_t *cklens = NULL;
828 if (!cklens && !(cklens = (size_t *) calloc(sizeof(int), n))) return NULL;
830 for (i=0; i < n; i++) {
831 if (!valid_cksumtype(i)) continue; /* array has holes */
832 for (j=0; j < n; j++) {
833 if (cklens[j] == 0) {
834 cklens[j] = krb5_checksum_size(NULL,i);
835 break; /* krb5 elem was new: add */
837 if (cklens[j] == krb5_checksum_size(NULL,i)) {
838 break; /* ignore duplicate elements */
842 #endif /* KRB5CHECKAUTH */
847 /* Return pointer to start of real authenticator within authenticator, or
848 ** return NULL on error.
849 ** Decrypted authenticator looks like this:
850 ** [0 or 8 byte confounder] [4-24 byte checksum] [real authent'r]
851 ** This hackery wouldn't be necessary if MIT KRB5 1.0.6 had the
852 ** krb5_auth_con_getcksumtype() function advertised in its krb5.h.
854 unsigned char *kssl_skip_confound(krb5_enctype etype, unsigned char *a)
856 int i, cklen, conlen;
857 static int *cksumlens = NULL;
858 unsigned char *test_auth;
860 conlen = (etype)? 8: 0;
862 if (!cksumlens && !(cksumlens = populate_cksumlens())) return NULL;
863 for (i=0; (cklen = cksumlens[i]) != 0; i++)
865 test_auth = a + conlen + cklen;
866 if (kssl_test_confound(test_auth)) return test_auth;
873 /* Set kssl_err error info when reason text is a simple string
874 ** kssl_err = struct { int reason; char text[KSSL_ERR_MAX+1]; }
877 kssl_err_set(KSSL_ERR *kssl_err, int reason, char *text)
879 if (kssl_err == NULL) return;
881 kssl_err->reason = reason;
882 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX, text);
887 /* Display contents of krb5_data struct, for debugging
890 print_krb5_data(char *label, krb5_data *kdata)
894 printf("%s[%d] ", label, kdata->length);
895 for (i=0; i < kdata->length; i++)
897 if (0 && isprint((int) kdata->data[i]))
898 printf( "%c ", kdata->data[i]);
900 printf( "%02x ", (unsigned char) kdata->data[i]);
906 /* Display contents of krb5_authdata struct, for debugging
909 print_krb5_authdata(char *label, krb5_authdata **adata)
913 printf("%s, authdata==0\n", label);
916 printf("%s [%p]\n", label, adata);
920 printf("%s[at%d:%d] ", label, adata->ad_type, adata->length);
921 for (i=0; i < adata->length; i++)
923 printf((isprint(adata->contents[i]))? "%c ": "%02x",
932 /* Display contents of krb5_keyblock struct, for debugging
935 print_krb5_keyblock(char *label, krb5_keyblock *keyblk)
941 printf("%s, keyblk==0\n", label);
945 printf("%s\n\t[et%d:%d]: ", label, keyblk->keytype,
946 keyblk->keyvalue->length);
947 for (i=0; i < keyblk->keyvalue->length; i++)
949 printf("%02x",(unsigned char *)(keyblk->keyvalue->contents)[i]);
953 printf("%s\n\t[et%d:%d]: ", label, keyblk->enctype, keyblk->length);
954 for (i=0; i < keyblk->length; i++)
956 printf("%02x",keyblk->contents[i]);
963 /* Display contents of krb5_principal_data struct, for debugging
964 ** (krb5_principal is typedef'd == krb5_principal_data *)
967 print_krb5_princ(char *label, krb5_principal_data *princ)
972 printf("%s principal Realm: ", label);
973 if (princ == NULL) return;
974 for (ui=0; ui < princ->realm.length; ui++) putchar(princ->realm.data[ui]);
975 printf(" (nametype %d) has %d strings:\n", princ->type,princ->length);
976 for (i=0; i < princ->length; i++)
978 printf("\t%d [%d]: ", i, princ->data[i].length);
979 for (uj=0; uj < princ->data[i].length; uj++) {
980 putchar(princ->data[i].data[uj]);
988 /* Given krb5 service (typically "kssl") and hostname in kssl_ctx,
989 ** Return encrypted Kerberos ticket for service @ hostname.
990 ** If authenp is non-NULL, also return encrypted authenticator,
991 ** whose data should be freed by caller.
992 ** (Originally was: Create Kerberos AP_REQ message for SSL Client.)
994 ** 19990628 VRS Started; Returns Kerberos AP_REQ message.
995 ** 20010409 VRS Modified for RFC2712; Returns enc tkt.
996 ** 20010606 VRS May also return optional authenticator.
999 kssl_cget_tkt( /* UPDATE */ KSSL_CTX *kssl_ctx,
1000 /* OUT */ krb5_data **enc_ticketp,
1001 /* UPDATE */ krb5_data *authenp,
1002 /* OUT */ KSSL_ERR *kssl_err)
1004 krb5_error_code krb5rc = KRB5KRB_ERR_GENERIC;
1005 krb5_context krb5context = NULL;
1006 krb5_auth_context krb5auth_context = NULL;
1007 krb5_ccache krb5ccdef = NULL;
1008 krb5_creds krb5creds, *krb5credsp = NULL;
1009 krb5_data krb5_app_req;
1011 kssl_err_set(kssl_err, 0, "");
1012 memset((char *)&krb5creds, 0, sizeof(krb5creds));
1016 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1017 "No kssl_ctx defined.\n");
1020 else if (!kssl_ctx->service_host)
1022 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1023 "kssl_ctx service_host undefined.\n");
1027 if ((krb5rc = krb5_init_context(&krb5context)) != 0)
1029 BIO_snprintf(kssl_err->text,KSSL_ERR_MAX,
1030 "krb5_init_context() fails: %d\n", krb5rc);
1031 kssl_err->reason = SSL_R_KRB5_C_INIT;
1035 if ((krb5rc = krb5_sname_to_principal(krb5context,
1036 kssl_ctx->service_host,
1037 (kssl_ctx->service_name)? kssl_ctx->service_name: KRB5SVC,
1038 KRB5_NT_SRV_HST, &krb5creds.server)) != 0)
1040 BIO_snprintf(kssl_err->text,KSSL_ERR_MAX,
1041 "krb5_sname_to_principal() fails for %s/%s\n",
1042 kssl_ctx->service_host,
1043 (kssl_ctx->service_name)? kssl_ctx->service_name:
1045 kssl_err->reason = SSL_R_KRB5_C_INIT;
1049 if ((krb5rc = krb5_cc_default(krb5context, &krb5ccdef)) != 0)
1051 kssl_err_set(kssl_err, SSL_R_KRB5_C_CC_PRINC,
1052 "krb5_cc_default fails.\n");
1056 if ((krb5rc = krb5_cc_get_principal(krb5context, krb5ccdef,
1057 &krb5creds.client)) != 0)
1059 kssl_err_set(kssl_err, SSL_R_KRB5_C_CC_PRINC,
1060 "krb5_cc_get_principal() fails.\n");
1064 if ((krb5rc = krb5_get_credentials(krb5context, 0, krb5ccdef,
1065 &krb5creds, &krb5credsp)) != 0)
1067 kssl_err_set(kssl_err, SSL_R_KRB5_C_GET_CRED,
1068 "krb5_get_credentials() fails.\n");
1072 *enc_ticketp = &krb5credsp->ticket;
1074 kssl_ctx->enctype = krb5credsp->session.keytype;
1076 kssl_ctx->enctype = krb5credsp->keyblock.enctype;
1079 krb5rc = KRB5KRB_ERR_GENERIC;
1080 /* caller should free data of krb5_app_req */
1081 /* 20010406 VRS deleted for real KerberosWrapper
1082 ** 20010605 VRS reinstated to offer Authenticator to KerberosWrapper
1084 krb5_app_req.length = 0;
1087 krb5_data krb5in_data;
1090 KRB5_APREQBODY *ap_req;
1092 authenp->length = 0;
1093 krb5in_data.data = NULL;
1094 krb5in_data.length = 0;
1095 if ((krb5rc = krb5_mk_req_extended(krb5context,
1096 &krb5auth_context, 0, &krb5in_data, krb5credsp,
1097 &krb5_app_req)) != 0)
1099 kssl_err_set(kssl_err, SSL_R_KRB5_C_MK_REQ,
1100 "krb5_mk_req_extended() fails.\n");
1104 arlen = krb5_app_req.length;
1105 p = krb5_app_req.data;
1106 ap_req = (KRB5_APREQBODY *) d2i_KRB5_APREQ(NULL, &p, arlen);
1109 authenp->length = i2d_KRB5_ENCDATA(
1110 ap_req->authenticator, NULL);
1111 if (authenp->length &&
1112 (authenp->data = malloc(authenp->length)))
1114 unsigned char *p = authenp->data;
1115 authenp->length = i2d_KRB5_ENCDATA(
1116 ap_req->authenticator, &p);
1120 if (ap_req) KRB5_APREQ_free((KRB5_APREQ *) ap_req);
1121 if (krb5_app_req.length)
1122 kssl_krb5_free_data_contents(krb5context,&krb5_app_req);
1125 if (kssl_ctx_setkey(kssl_ctx, &krb5credsp->session))
1127 kssl_err_set(kssl_err, SSL_R_KRB5_C_INIT,
1128 "kssl_ctx_setkey() fails.\n");
1131 if (kssl_ctx_setkey(kssl_ctx, &krb5credsp->keyblock))
1133 kssl_err_set(kssl_err, SSL_R_KRB5_C_INIT,
1134 "kssl_ctx_setkey() fails.\n");
1141 kssl_ctx_show(kssl_ctx);
1142 #endif /* KSSL_DEBUG */
1144 if (krb5creds.client) krb5_free_principal(krb5context,
1146 if (krb5creds.server) krb5_free_principal(krb5context,
1148 if (krb5auth_context) krb5_auth_con_free(krb5context,
1150 if (krb5context) krb5_free_context(krb5context);
1155 /* Given d2i_-decoded asn1ticket, allocate and return a new krb5_ticket.
1156 ** Return Kerberos error code and kssl_err struct on error.
1157 ** Allocates krb5_ticket and krb5_principal; caller should free these.
1159 ** 20010410 VRS Implemented krb5_decode_ticket() as
1160 ** old_krb5_decode_ticket(). Missing from MIT1.0.6.
1161 ** 20010615 VRS Re-cast as openssl/asn1 d2i_*() functions.
1162 ** Re-used some of the old krb5_decode_ticket()
1163 ** code here. This tkt should alloc/free just
1164 ** like the real thing.
1167 kssl_TKT2tkt( /* IN */ krb5_context krb5context,
1168 /* IN */ KRB5_TKTBODY *asn1ticket,
1169 /* OUT */ krb5_ticket **krb5ticket,
1170 /* OUT */ KSSL_ERR *kssl_err )
1172 krb5_error_code krb5rc = KRB5KRB_ERR_GENERIC;
1173 krb5_ticket *new5ticket = NULL;
1174 ASN1_GENERALSTRING *gstr_svc, *gstr_host;
1178 if (asn1ticket == NULL || asn1ticket->realm == NULL ||
1179 asn1ticket->sname == NULL ||
1180 asn1ticket->sname->namestring == NULL ||
1181 asn1ticket->sname->namestring->num < 2)
1183 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1184 "Null field in asn1ticket.\n");
1185 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1186 return KRB5KRB_ERR_GENERIC;
1189 if ((new5ticket = (krb5_ticket *) calloc(1, sizeof(krb5_ticket)))==NULL)
1191 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1192 "Unable to allocate new krb5_ticket.\n");
1193 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1194 return ENOMEM; /* or KRB5KRB_ERR_GENERIC; */
1197 gstr_svc = (ASN1_GENERALSTRING*)asn1ticket->sname->namestring->data[0];
1198 gstr_host = (ASN1_GENERALSTRING*)asn1ticket->sname->namestring->data[1];
1200 if ((krb5rc = kssl_build_principal_2(krb5context,
1201 &new5ticket->server,
1202 asn1ticket->realm->length, asn1ticket->realm->data,
1203 gstr_svc->length, gstr_svc->data,
1204 gstr_host->length, gstr_host->data)) != 0)
1207 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1208 "Error building ticket server principal.\n");
1209 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1210 return krb5rc; /* or KRB5KRB_ERR_GENERIC; */
1213 krb5_princ_type(krb5context, new5ticket->server) =
1214 asn1ticket->sname->nametype->data[0];
1215 new5ticket->enc_part.enctype = asn1ticket->encdata->etype->data[0];
1216 new5ticket->enc_part.kvno = asn1ticket->encdata->kvno->data[0];
1217 new5ticket->enc_part.ciphertext.length =
1218 asn1ticket->encdata->cipher->length;
1219 if ((new5ticket->enc_part.ciphertext.data =
1220 calloc(1, asn1ticket->encdata->cipher->length)) == NULL)
1223 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1224 "Error allocating cipher in krb5ticket.\n");
1225 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1226 return KRB5KRB_ERR_GENERIC;
1230 memcpy(new5ticket->enc_part.ciphertext.data,
1231 asn1ticket->encdata->cipher->data,
1232 asn1ticket->encdata->cipher->length);
1235 *krb5ticket = new5ticket;
1240 /* Given krb5 service name in KSSL_CTX *kssl_ctx (typically "kssl"),
1241 ** and krb5 AP_REQ message & message length,
1242 ** Return Kerberos session key and client principle
1243 ** to SSL Server in KSSL_CTX *kssl_ctx.
1245 ** 19990702 VRS Started.
1248 kssl_sget_tkt( /* UPDATE */ KSSL_CTX *kssl_ctx,
1249 /* IN */ krb5_data *indata,
1250 /* OUT */ krb5_ticket_times *ttimes,
1251 /* OUT */ KSSL_ERR *kssl_err )
1253 krb5_error_code krb5rc = KRB5KRB_ERR_GENERIC;
1254 static krb5_context krb5context = NULL;
1255 static krb5_auth_context krb5auth_context = NULL;
1256 krb5_ticket *krb5ticket = NULL;
1257 KRB5_TKTBODY *asn1ticket = NULL;
1259 krb5_keytab krb5keytab = NULL;
1260 krb5_keytab_entry kt_entry;
1261 krb5_principal krb5server;
1262 krb5_rcache rcache = NULL;
1264 kssl_err_set(kssl_err, 0, "");
1268 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1269 "No kssl_ctx defined.\n");
1274 printf("in kssl_sget_tkt(%s)\n", kstring(kssl_ctx->service_name));
1275 #endif /* KSSL_DEBUG */
1277 if (!krb5context && (krb5rc = krb5_init_context(&krb5context)))
1279 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1280 "krb5_init_context() fails.\n");
1283 if (krb5auth_context &&
1284 (krb5rc = krb5_auth_con_free(krb5context, krb5auth_context)))
1286 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1287 "krb5_auth_con_free() fails.\n");
1290 else krb5auth_context = NULL;
1291 if (!krb5auth_context &&
1292 (krb5rc = krb5_auth_con_init(krb5context, &krb5auth_context)))
1294 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1295 "krb5_auth_con_init() fails.\n");
1300 if ((krb5rc = krb5_auth_con_getrcache(krb5context, krb5auth_context,
1303 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1304 "krb5_auth_con_getrcache() fails.\n");
1308 if ((krb5rc = krb5_sname_to_principal(krb5context, NULL,
1309 (kssl_ctx->service_name)? kssl_ctx->service_name: KRB5SVC,
1310 KRB5_NT_SRV_HST, &krb5server)) != 0)
1312 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1313 "krb5_sname_to_principal() fails.\n");
1319 if ((krb5rc = krb5_get_server_rcache(krb5context,
1320 krb5_princ_component(krb5context, krb5server, 0),
1323 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1324 "krb5_get_server_rcache() fails.\n");
1329 if ((krb5rc = krb5_auth_con_setrcache(krb5context, krb5auth_context, rcache)))
1331 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1332 "krb5_auth_con_setrcache() fails.\n");
1337 /* kssl_ctx->keytab_file == NULL ==> use Kerberos default
1339 if (kssl_ctx->keytab_file)
1341 krb5rc = krb5_kt_resolve(krb5context, kssl_ctx->keytab_file,
1345 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1346 "krb5_kt_resolve() fails.\n");
1352 krb5rc = krb5_kt_default(krb5context,&krb5keytab);
1355 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1356 "krb5_kt_default() fails.\n");
1361 /* Actual Kerberos5 krb5_recvauth() has initial conversation here
1362 ** o check KRB5_SENDAUTH_BADAUTHVERS
1363 ** unless KRB5_RECVAUTH_SKIP_VERSION
1364 ** o check KRB5_SENDAUTH_BADAPPLVERS
1365 ** o send "0" msg if all OK
1368 /* 20010411 was using AP_REQ instead of true KerberosWrapper
1370 ** if ((krb5rc = krb5_rd_req(krb5context, &krb5auth_context,
1371 ** &krb5in_data, krb5server, krb5keytab,
1372 ** &ap_option, &krb5ticket)) != 0) { Error }
1376 if ((asn1ticket = (KRB5_TKTBODY *) d2i_KRB5_TICKET(NULL, &p,
1377 (long) indata->length)) == NULL)
1379 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1380 "d2i_KRB5_TICKET() ASN.1 decode failure.\n");
1381 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1385 /* Was: krb5rc = krb5_decode_ticket(krb5in_data,&krb5ticket)) != 0) */
1386 if ((krb5rc = kssl_TKT2tkt(krb5context, asn1ticket, &krb5ticket,
1389 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1390 "Error converting ASN.1 ticket to krb5_ticket.\n");
1391 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1395 if (! krb5_principal_compare(krb5context, krb5server,
1396 krb5ticket->server)) {
1397 krb5rc = KRB5_PRINC_NOMATCH;
1398 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1399 "server principal != ticket principal\n");
1400 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1403 if ((krb5rc = krb5_kt_get_entry(krb5context, krb5keytab,
1404 krb5ticket->server, krb5ticket->enc_part.kvno,
1405 krb5ticket->enc_part.enctype, &kt_entry)) != 0) {
1406 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1407 "krb5_kt_get_entry() fails with %x.\n", krb5rc);
1408 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1411 if ((krb5rc = krb5_decrypt_tkt_part(krb5context, &kt_entry.key,
1412 krb5ticket)) != 0) {
1413 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1414 "krb5_decrypt_tkt_part() failed.\n");
1415 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1419 krb5_kt_free_entry(krb5context, &kt_entry);
1422 int i; krb5_address **paddr = krb5ticket->enc_part2->caddrs;
1423 printf("Decrypted ticket fields:\n");
1424 printf("\tflags: %X, transit-type: %X",
1425 krb5ticket->enc_part2->flags,
1426 krb5ticket->enc_part2->transited.tr_type);
1427 print_krb5_data("\ttransit-data: ",
1428 &(krb5ticket->enc_part2->transited.tr_contents));
1429 printf("\tcaddrs: %p, authdata: %p\n",
1430 krb5ticket->enc_part2->caddrs,
1431 krb5ticket->enc_part2->authorization_data);
1434 printf("\tcaddrs:\n");
1435 for (i=0; paddr[i] != NULL; i++)
1438 d.length=paddr[i]->length;
1439 d.data=paddr[i]->contents;
1440 print_krb5_data("\t\tIP: ", &d);
1443 printf("\tstart/auth/end times: %d / %d / %d\n",
1444 krb5ticket->enc_part2->times.starttime,
1445 krb5ticket->enc_part2->times.authtime,
1446 krb5ticket->enc_part2->times.endtime);
1448 #endif /* KSSL_DEBUG */
1451 krb5rc = KRB5_NO_TKT_SUPPLIED;
1452 if (!krb5ticket || !krb5ticket->enc_part2 ||
1453 !krb5ticket->enc_part2->client ||
1454 !krb5ticket->enc_part2->client->data ||
1455 !krb5ticket->enc_part2->session)
1457 kssl_err_set(kssl_err, SSL_R_KRB5_S_BAD_TICKET,
1458 "bad ticket from krb5_rd_req.\n");
1460 else if (kssl_ctx_setprinc(kssl_ctx, KSSL_CLIENT,
1461 &krb5ticket->enc_part2->client->realm,
1462 krb5ticket->enc_part2->client->data))
1464 kssl_err_set(kssl_err, SSL_R_KRB5_S_BAD_TICKET,
1465 "kssl_ctx_setprinc() fails.\n");
1467 else if (kssl_ctx_setkey(kssl_ctx, krb5ticket->enc_part2->session))
1469 kssl_err_set(kssl_err, SSL_R_KRB5_S_BAD_TICKET,
1470 "kssl_ctx_setkey() fails.\n");
1472 else if (krb5ticket->enc_part2->flags & TKT_FLG_INVALID)
1474 krb5rc = KRB5KRB_AP_ERR_TKT_INVALID;
1475 kssl_err_set(kssl_err, SSL_R_KRB5_S_BAD_TICKET,
1476 "invalid ticket from krb5_rd_req.\n");
1480 kssl_ctx->enctype = krb5ticket->enc_part.enctype;
1481 ttimes->authtime = krb5ticket->enc_part2->times.authtime;
1482 ttimes->starttime = krb5ticket->enc_part2->times.starttime;
1483 ttimes->endtime = krb5ticket->enc_part2->times.endtime;
1484 ttimes->renew_till = krb5ticket->enc_part2->times.renew_till;
1488 kssl_ctx_show(kssl_ctx);
1489 #endif /* KSSL_DEBUG */
1491 if (asn1ticket) KRB5_TICKET_free((KRB5_TICKET *) asn1ticket);
1492 if (krb5keytab) krb5_kt_close(krb5context, krb5keytab);
1493 if (krb5ticket) krb5_free_ticket(krb5context, krb5ticket);
1494 if (krb5server) krb5_free_principal(krb5context, krb5server);
1499 /* Allocate & return a new kssl_ctx struct.
1504 return ((KSSL_CTX *) calloc(1, sizeof(KSSL_CTX)));
1508 /* Frees a kssl_ctx struct and any allocated memory it holds.
1512 kssl_ctx_free(KSSL_CTX *kssl_ctx)
1514 if (kssl_ctx == NULL) return kssl_ctx;
1516 if (kssl_ctx->key) memset(kssl_ctx->key, 0,
1518 if (kssl_ctx->key) free(kssl_ctx->key);
1519 if (kssl_ctx->client_princ) free(kssl_ctx->client_princ);
1520 if (kssl_ctx->service_host) free(kssl_ctx->service_host);
1521 if (kssl_ctx->service_name) free(kssl_ctx->service_name);
1522 if (kssl_ctx->keytab_file) free(kssl_ctx->keytab_file);
1525 return (KSSL_CTX *) NULL;
1529 /* Given a (krb5_data *) entity (and optional realm),
1530 ** set the plain (char *) client_princ or service_host member
1531 ** of the kssl_ctx struct.
1534 kssl_ctx_setprinc(KSSL_CTX *kssl_ctx, int which,
1535 krb5_data *realm, krb5_data *entity)
1540 if (kssl_ctx == NULL || entity == NULL) return KSSL_CTX_ERR;
1544 case KSSL_CLIENT: princ = &kssl_ctx->client_princ; break;
1545 case KSSL_SERVER: princ = &kssl_ctx->service_host; break;
1546 default: return KSSL_CTX_ERR; break;
1548 if (*princ) free(*princ);
1550 length = entity->length + ((realm)? realm->length + 2: 1);
1551 if ((*princ = calloc(1, length)) == NULL)
1552 return KSSL_CTX_ERR;
1555 strncpy(*princ, entity->data, entity->length);
1558 strcat (*princ, "@");
1559 (void) strncat(*princ, realm->data, realm->length);
1567 /* Set one of the plain (char *) string members of the kssl_ctx struct.
1568 ** Default values should be:
1569 ** which == KSSL_SERVICE => "khost" (KRB5SVC)
1570 ** which == KSSL_KEYTAB => "/etc/krb5.keytab" (KRB5KEYTAB)
1573 kssl_ctx_setstring(KSSL_CTX *kssl_ctx, int which, char *text)
1577 if (!kssl_ctx) return KSSL_CTX_ERR;
1581 case KSSL_SERVICE: string = &kssl_ctx->service_name; break;
1582 case KSSL_SERVER: string = &kssl_ctx->service_host; break;
1583 case KSSL_CLIENT: string = &kssl_ctx->client_princ; break;
1584 case KSSL_KEYTAB: string = &kssl_ctx->keytab_file; break;
1585 default: return KSSL_CTX_ERR; break;
1587 if (*string) free(*string);
1595 if ((*string = calloc(1, strlen(text) + 1)) == NULL)
1596 return KSSL_CTX_ERR;
1598 strcpy(*string, text);
1604 /* Copy the Kerberos session key from a (krb5_keyblock *) to a kssl_ctx
1605 ** struct. Clear kssl_ctx->key if Kerberos session key is NULL.
1608 kssl_ctx_setkey(KSSL_CTX *kssl_ctx, krb5_keyblock *session)
1611 krb5_enctype enctype;
1612 krb5_octet FAR *contents = NULL;
1614 if (!kssl_ctx) return KSSL_CTX_ERR;
1618 memset(kssl_ctx->key, 0, kssl_ctx->length);
1619 free(kssl_ctx->key);
1626 length = session->keyvalue->length;
1627 enctype = session->keytype;
1628 contents = session->keyvalue->contents;
1630 length = session->length;
1631 enctype = session->enctype;
1632 contents = session->contents;
1634 kssl_ctx->enctype = enctype;
1635 kssl_ctx->length = length;
1639 kssl_ctx->enctype = ENCTYPE_UNKNOWN;
1640 kssl_ctx->length = 0;
1644 if ((kssl_ctx->key =
1645 (krb5_octet FAR *) calloc(1, kssl_ctx->length)) == NULL)
1647 kssl_ctx->length = 0;
1648 return KSSL_CTX_ERR;
1651 memcpy(kssl_ctx->key, contents, length);
1657 /* Display contents of kssl_ctx struct
1660 kssl_ctx_show(KSSL_CTX *kssl_ctx)
1664 printf("kssl_ctx: ");
1665 if (kssl_ctx == NULL)
1671 printf("%p\n", kssl_ctx);
1673 printf("\tservice:\t%s\n",
1674 (kssl_ctx->service_name)? kssl_ctx->service_name: "NULL");
1675 printf("\tclient:\t%s\n",
1676 (kssl_ctx->client_princ)? kssl_ctx->client_princ: "NULL");
1677 printf("\tserver:\t%s\n",
1678 (kssl_ctx->service_host)? kssl_ctx->service_host: "NULL");
1679 printf("\tkeytab:\t%s\n",
1680 (kssl_ctx->keytab_file)? kssl_ctx->keytab_file: "NULL");
1681 printf("\tkey [%d:%d]:\t",
1682 kssl_ctx->enctype, kssl_ctx->length);
1684 for (i=0; i < kssl_ctx->length && kssl_ctx->key; i++)
1686 printf("%02x", kssl_ctx->key[i]);
1693 kssl_keytab_is_available(KSSL_CTX *kssl_ctx)
1695 krb5_context krb5context = NULL;
1696 krb5_keytab krb5keytab = NULL;
1697 krb5_keytab_entry entry;
1698 krb5_principal princ = NULL;
1699 krb5_error_code krb5rc = KRB5KRB_ERR_GENERIC;
1702 if ((krb5rc = krb5_init_context(&krb5context)))
1705 /* kssl_ctx->keytab_file == NULL ==> use Kerberos default
1707 if (kssl_ctx->keytab_file)
1709 krb5rc = krb5_kt_resolve(krb5context, kssl_ctx->keytab_file,
1716 krb5rc = krb5_kt_default(krb5context,&krb5keytab);
1721 /* the host key we are looking for */
1722 krb5rc = krb5_sname_to_principal(krb5context, NULL,
1723 kssl_ctx->service_name ? kssl_ctx->service_name: KRB5SVC,
1724 KRB5_NT_SRV_HST, &princ);
1726 krb5rc = krb5_kt_get_entry(krb5context, krb5keytab,
1729 0 /* IGNORE_ENCTYPE */,
1731 if ( krb5rc == KRB5_KT_NOTFOUND ) {
1734 } else if ( krb5rc )
1737 krb5_kt_free_entry(krb5context, &entry);
1741 if (krb5keytab) krb5_kt_close(krb5context, krb5keytab);
1742 if (princ) krb5_free_principal(krb5context, princ);
1743 if (krb5context) krb5_free_context(krb5context);
1748 kssl_tgt_is_available(KSSL_CTX *kssl_ctx)
1750 krb5_error_code krb5rc = KRB5KRB_ERR_GENERIC;
1751 krb5_context krb5context = NULL;
1752 krb5_ccache krb5ccdef = NULL;
1753 krb5_creds krb5creds, *krb5credsp = NULL;
1756 memset((char *)&krb5creds, 0, sizeof(krb5creds));
1761 if (!kssl_ctx->service_host)
1764 if ((krb5rc = krb5_init_context(&krb5context)) != 0)
1767 if ((krb5rc = krb5_sname_to_principal(krb5context,
1768 kssl_ctx->service_host,
1769 (kssl_ctx->service_name)? kssl_ctx->service_name: KRB5SVC,
1770 KRB5_NT_SRV_HST, &krb5creds.server)) != 0)
1773 if ((krb5rc = krb5_cc_default(krb5context, &krb5ccdef)) != 0)
1776 if ((krb5rc = krb5_cc_get_principal(krb5context, krb5ccdef,
1777 &krb5creds.client)) != 0)
1780 if ((krb5rc = krb5_get_credentials(krb5context, 0, krb5ccdef,
1781 &krb5creds, &krb5credsp)) != 0)
1788 kssl_ctx_show(kssl_ctx);
1789 #endif /* KSSL_DEBUG */
1791 if (krb5creds.client) krb5_free_principal(krb5context, krb5creds.client);
1792 if (krb5creds.server) krb5_free_principal(krb5context, krb5creds.server);
1793 if (krb5context) krb5_free_context(krb5context);
1797 #if !defined(OPENSSL_SYS_WINDOWS) && !defined(OPENSSL_SYS_WIN32)
1798 void kssl_krb5_free_data_contents(krb5_context context, krb5_data *data)
1804 #elif defined(KRB5_MIT_OLD11)
1806 krb5_xfree(data->data);
1810 krb5_free_data_contents(NULL, data);
1813 #endif /* !OPENSSL_SYS_WINDOWS && !OPENSSL_SYS_WIN32 */
1815 /* Helper function for kssl_validate_times().
1816 ** We need context->clockskew, but krb5_context is an opaque struct.
1817 ** So we try to sneek the clockskew out through the replay cache.
1818 ** If that fails just return a likely default (300 seconds).
1820 krb5_deltat get_rc_clockskew(krb5_context context)
1823 krb5_deltat clockskew;
1825 if (krb5_rc_default(context, &rc)) return KSSL_CLOCKSKEW;
1826 if (krb5_rc_initialize(context, rc, 0)) return KSSL_CLOCKSKEW;
1827 if (krb5_rc_get_lifespan(context, rc, &clockskew)) {
1828 clockskew = KSSL_CLOCKSKEW;
1830 (void) krb5_rc_destroy(context, rc);
1835 /* kssl_validate_times() combines (and more importantly exposes)
1836 ** the MIT KRB5 internal function krb5_validate_times() and the
1837 ** in_clock_skew() macro. The authenticator client time is checked
1838 ** to be within clockskew secs of the current time and the current
1839 ** time is checked to be within the ticket start and expire times.
1840 ** Either check may be omitted by supplying a NULL value.
1841 ** Returns 0 for valid times, SSL_R_KRB5* error codes otherwise.
1842 ** See Also: (Kerberos source)/krb5/lib/krb5/krb/valid_times.c
1845 krb5_error_code kssl_validate_times( krb5_timestamp atime,
1846 krb5_ticket_times *ttimes)
1849 krb5_timestamp start, now;
1851 krb5_context context;
1853 if ((rc = krb5_init_context(&context))) return SSL_R_KRB5_S_BAD_TICKET;
1854 skew = get_rc_clockskew(context);
1855 if ((rc = krb5_timeofday(context,&now))) return SSL_R_KRB5_S_BAD_TICKET;
1856 krb5_free_context(context);
1858 if (atime && labs(atime - now) >= skew) return SSL_R_KRB5_S_TKT_SKEW;
1860 if (! ttimes) return 0;
1862 start = (ttimes->starttime != 0)? ttimes->starttime: ttimes->authtime;
1863 if (start - now > skew) return SSL_R_KRB5_S_TKT_NYV;
1864 if ((now - ttimes->endtime) > skew) return SSL_R_KRB5_S_TKT_EXPIRED;
1867 printf("kssl_validate_times: %d |<- | %d - %d | < %d ->| %d\n",
1868 start, atime, now, skew, ttimes->endtime);
1869 #endif /* KSSL_DEBUG */
1875 /* Decode and decrypt given DER-encoded authenticator, then pass
1876 ** authenticator ctime back in *atimep (or 0 if time unavailable).
1877 ** Returns krb5_error_code and kssl_err on error. A NULL
1878 ** authenticator (authentp->length == 0) is not considered an error.
1879 ** Note that kssl_check_authent() makes use of the KRB5 session key;
1880 ** you must call kssl_sget_tkt() to get the key before calling this routine.
1882 krb5_error_code kssl_check_authent(
1883 /* IN */ KSSL_CTX *kssl_ctx,
1884 /* IN */ krb5_data *authentp,
1885 /* OUT */ krb5_timestamp *atimep,
1886 /* OUT */ KSSL_ERR *kssl_err )
1888 krb5_error_code krb5rc = 0;
1889 KRB5_ENCDATA *dec_authent = NULL;
1890 KRB5_AUTHENTBODY *auth = NULL;
1891 krb5_enctype enctype;
1892 EVP_CIPHER_CTX ciph_ctx;
1893 EVP_CIPHER *enc = NULL;
1894 unsigned char iv[EVP_MAX_IV_LENGTH];
1895 unsigned char *p, *unenc_authent, *tbuf = NULL;
1896 int padl, outl, unencbufsize;
1899 kssl_err_set(kssl_err, 0, "");
1901 #ifndef KRB5CHECKAUTH
1904 #if KRB5CHECKAUTH == 0
1907 #endif /* KRB5CHECKAUTH */
1909 if (authentp == NULL || authentp->length == 0) return 0;
1914 printf("kssl_check_authent: authenticator[%d]:\n",authentp->length);
1916 for (ui=0; ui < authentp->length; ui++) printf("%02x ",p[ui]);
1919 #endif /* KSSL_DEBUG */
1921 unencbufsize = 2 * authentp->length;
1922 if ((unenc_authent = calloc(1, unencbufsize)) == NULL)
1924 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1925 "Unable to allocate authenticator buffer.\n");
1926 krb5rc = KRB5KRB_ERR_GENERIC;
1931 if ((dec_authent = d2i_KRB5_ENCDATA(NULL, &p,
1932 (long) authentp->length)) == NULL)
1934 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1935 "Error decoding authenticator.\n");
1936 krb5rc = KRB5KRB_AP_ERR_BAD_INTEGRITY;
1940 enctype = dec_authent->etype->data[0]; /* should = kssl_ctx->enctype */
1941 enc = kssl_map_enc(enctype);
1942 memset(iv, 0, EVP_MAX_IV_LENGTH); /* per RFC 1510 */
1944 EVP_DecryptInit(&ciph_ctx, enc, kssl_ctx->key, iv);
1945 EVP_DecryptUpdate(&ciph_ctx, unenc_authent, &outl,
1946 dec_authent->cipher->data, dec_authent->cipher->length);
1947 if (outl > unencbufsize)
1949 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1950 "Buffer overflow decrypting authenticator.\n");
1951 krb5rc = KRB5KRB_AP_ERR_BAD_INTEGRITY;
1954 EVP_DecryptFinal(&ciph_ctx, &(unenc_authent[outl]), &padl);
1956 if (outl > unencbufsize)
1958 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1959 "Buffer overflow decrypting authenticator.\n");
1960 krb5rc = KRB5KRB_AP_ERR_BAD_INTEGRITY;
1963 EVP_CIPHER_CTX_cleanup(&ciph_ctx);
1966 printf("kssl_check_authent: decrypted authenticator[%d] =\n", outl);
1967 for (padl=0; padl < outl; padl++) printf("%02x ",unenc_authent[padl]);
1969 #endif /* KSSL_DEBUG */
1971 if ((p = kssl_skip_confound(enctype, unenc_authent)) == NULL)
1973 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1974 "confounded by authenticator.\n");
1975 krb5rc = KRB5KRB_AP_ERR_BAD_INTEGRITY;
1978 outl -= p - unenc_authent;
1980 if ((auth = (KRB5_AUTHENTBODY *) d2i_KRB5_AUTHENT(NULL, &p,
1981 (long) outl))==NULL)
1983 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1984 "Error decoding authenticator body.\n");
1985 krb5rc = KRB5KRB_AP_ERR_BAD_INTEGRITY;
1988 if ((tbuf = calloc(1, auth->ctime->length + 1)) == NULL)
1990 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1991 "Unable to allocate atime buffer.\n");
1992 krb5rc = KRB5KRB_ERR_GENERIC;
1995 else strncpy(tbuf, auth->ctime->data, auth->ctime->length);
1997 if ( auth->ctime->length >= 9 && auth->ctime->length <= 14 )
1998 /* tbuf == "%Y%m%d%H%M%S" */
2000 struct tm tm_time, *tm_l, *tm_g;
2001 time_t now, tl, tg, tr, tz_offset;
2005 memset(&tm_time,0,sizeof(struct tm));
2009 tm_time.tm_year = tm_time.tm_year*10 + (*p-'0');
2011 i<2 && isdigit(*p) && tm_time.tm_mon <= 1;
2013 tm_time.tm_mon = tm_time.tm_mon*10 + (*p-'0');
2015 i<2 && isdigit(*p) && tm_time.tm_mday <= 3;
2017 tm_time.tm_mday = tm_time.tm_mday*10 + (*p-'0');
2019 i<2 && isdigit(*p) && tm_time.tm_hour <= 2;
2021 tm_time.tm_hour = tm_time.tm_hour*10 + (*p-'0');
2023 i<2 && isdigit(*p) && tm_time.tm_min <= 6;
2025 tm_time.tm_min = tm_time.tm_min*10 + (*p-'0');
2027 i<2 && isdigit(*p) && tm_time.tm_sec <= 6;
2029 tm_time.tm_sec = tm_time.tm_sec*10 + (*p-'0');
2032 tm_l = localtime(&now); tl = mktime(tm_l);
2033 tm_g = gmtime(&now); tg = mktime(tm_g);
2034 tz_offset = tg - tl;
2035 tr = mktime(&tm_time);
2037 if (tr != (time_t)(-1))
2038 *atimep = mktime(&tm_time) - tz_offset;
2041 printf("kssl_check_authent: client time %s = %d\n", tbuf, *atimep);
2042 #endif /* KSSL_DEBUG */
2045 if (tbuf) free(tbuf);
2046 if (auth) KRB5_AUTHENT_free((KRB5_AUTHENT *) auth);
2047 if (dec_authent) KRB5_ENCDATA_free(dec_authent);
2048 if (unenc_authent) free(unenc_authent);
2053 /* Replaces krb5_build_principal_ext(), with varargs length == 2 (svc, host),
2054 ** because I dont't know how to stub varargs.
2055 ** Returns krb5_error_code == ENOMEM on alloc error, otherwise
2056 ** passes back newly constructed principal, which should be freed by caller.
2058 krb5_error_code kssl_build_principal_2(
2059 /* UPDATE */ krb5_context context,
2060 /* OUT */ krb5_principal *princ,
2061 /* IN */ int rlen, const char *realm,
2062 /* IN */ int slen, const char *svc,
2063 /* IN */ int hlen, const char *host)
2065 krb5_data *p_data = NULL;
2066 krb5_principal new_p = NULL;
2069 if ((p_data = (krb5_data *) calloc(2, sizeof(krb5_data))) == NULL ||
2070 (new_p = (krb5_principal) calloc(1, sizeof(krb5_principal_data)))
2073 new_p->data = p_data;
2075 if ((new_r = calloc(1, rlen + 1)) == NULL) goto err;
2076 memcpy(new_r, realm, rlen);
2077 krb5_princ_set_realm_length(context, new_p, rlen);
2078 krb5_princ_set_realm_data(context, new_p, new_r);
2080 if ((new_p->data[0].data = calloc(1, slen + 1)) == NULL) goto err;
2081 memcpy(new_p->data[0].data, svc, slen);
2082 new_p->data[0].length = slen;
2084 if ((new_p->data[1].data = calloc(1, hlen + 1)) == NULL) goto err;
2085 memcpy(new_p->data[1].data, host, hlen);
2086 new_p->data[1].length = hlen;
2088 krb5_princ_type(context, new_p) = KRB5_NT_UNKNOWN;
2093 if (new_p && new_p[0].data) free(new_p[0].data);
2094 if (new_p && new_p[1].data) free(new_p[1].data);
2095 if (new_p) free(new_p);
2096 if (new_r) free(new_r);
2101 #else /* !OPENSSL_NO_KRB5 */
2103 #if defined(PEDANTIC) || defined(OPENSSL_SYS_VMS)
2104 static int dummy=(int)&dummy;
2107 #endif /* !OPENSSL_NO_KRB5 */