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() */
76 #include <openssl/ssl.h>
77 #include <openssl/evp.h>
78 #include <openssl/objects.h>
79 #include <openssl/krb5_asn.h>
82 * When OpenSSL is built on Windows, we do not want to require that
83 * the Kerberos DLLs be available in order for the OpenSSL DLLs to
84 * work. Therefore, all Kerberos routines are loaded at run time
85 * and we do not link to a .LIB file.
88 #if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_WIN32)
90 * The purpose of the following pre-processor statements is to provide
91 * compatibility with different releases of MIT Kerberos for Windows.
92 * All versions up to 1.2 used macros. But macros do not allow for
93 * a binary compatible interface for DLLs. Therefore, all macros are
94 * being replaced by function calls. The following code will allow
95 * an OpenSSL DLL built on Windows to work whether or not the macro
96 * or function form of the routines are utilized.
98 #ifdef krb5_cc_get_principal
99 #define NO_DEF_KRB5_CCACHE
100 #undef krb5_cc_get_principal
102 #define krb5_cc_get_principal kssl_krb5_cc_get_principal
104 #define krb5_free_data_contents kssl_krb5_free_data_contents
105 #define krb5_free_context kssl_krb5_free_context
106 #define krb5_auth_con_free kssl_krb5_auth_con_free
107 #define krb5_free_principal kssl_krb5_free_principal
108 #define krb5_mk_req_extended kssl_krb5_mk_req_extended
109 #define krb5_get_credentials kssl_krb5_get_credentials
110 #define krb5_cc_default kssl_krb5_cc_default
111 #define krb5_sname_to_principal kssl_krb5_sname_to_principal
112 #define krb5_init_context kssl_krb5_init_context
113 #define krb5_free_ticket kssl_krb5_free_ticket
114 #define krb5_rd_req kssl_krb5_rd_req
115 #define krb5_kt_default kssl_krb5_kt_default
116 #define krb5_kt_resolve kssl_krb5_kt_resolve
117 #define krb5_auth_con_init kssl_krb5_auth_con_init
119 #define krb5_principal_compare kssl_krb5_principal_compare
120 /* macro #define krb5_kt_get_entry kssl_krb5_kt_get_entry */
121 #define krb5_decrypt_tkt_part kssl_krb5_decrypt_tkt_part
122 #define krb5_timeofday kssl_krb5_timeofday
123 #define krb5_rc_default kssl_krb5_rc_default
124 #define krb5_rc_initialize kssl_krb5_rc_initialize
125 #define krb5_rc_get_lifespan kssl_krb5_rc_get_lifespan
126 #define krb5_rc_destroy kssl_krb5_rc_destroy
127 #define valid_cksumtype kssl_valid_cksumtype
128 #define krb5_checksum_size kssl_krb5_checksum_size
129 #define krb5_kt_free_entry kssl_krb5_kt_free_entry
131 /* Prototypes for built in stubs */
132 void kssl_krb5_free_data_contents(krb5_context, krb5_data *);
133 void kssl_krb5_free_principal(krb5_context, krb5_principal );
134 krb5_error_code kssl_krb5_kt_resolve(krb5_context,
137 krb5_error_code kssl_krb5_kt_default(krb5_context,
139 krb5_error_code kssl_krb5_free_ticket(krb5_context, krb5_ticket *);
140 krb5_error_code kssl_krb5_rd_req(krb5_context, krb5_auth_context *,
141 krb5_const krb5_data *,
142 krb5_const_principal, krb5_keytab,
143 krb5_flags *,krb5_ticket **);
145 krb5_boolean kssl_krb5_principal_compare(krb5_context, krb5_const_principal,
146 krb5_const_principal);
147 krb5_error_code kssl_krb5_mk_req_extended(krb5_context,
149 krb5_const krb5_flags,
153 krb5_error_code kssl_krb5_init_context(krb5_context *);
154 void kssl_krb5_free_context(krb5_context);
155 krb5_error_code kssl_krb5_cc_default(krb5_context,krb5_ccache *);
156 krb5_error_code kssl_krb5_sname_to_principal(krb5_context,
161 krb5_error_code kssl_krb5_get_credentials(krb5_context,
162 krb5_const krb5_flags,
166 krb5_error_code kssl_krb5_auth_con_init(krb5_context,
167 krb5_auth_context *);
168 krb5_error_code kssl_krb5_cc_get_principal(krb5_context context,
170 krb5_principal *principal);
171 krb5_error_code kssl_krb5_auth_con_free(krb5_context,krb5_auth_context);
172 size_t kssl_krb5_checksum_size(krb5_context context,krb5_cksumtype ctype);
173 krb5_boolean kssl_valid_cksumtype(krb5_cksumtype ctype);
174 krb5_error_code krb5_kt_free_entry(krb5_context,krb5_keytab_entry FAR * );
176 /* Function pointers (almost all Kerberos functions are _stdcall) */
177 static void (_stdcall *p_krb5_free_data_contents)(krb5_context, krb5_data *)
179 static void (_stdcall *p_krb5_free_principal)(krb5_context, krb5_principal )
181 static krb5_error_code(_stdcall *p_krb5_kt_resolve)
182 (krb5_context, krb5_const char *, krb5_keytab *)=NULL;
183 static krb5_error_code (_stdcall *p_krb5_kt_default)(krb5_context,
185 static krb5_error_code (_stdcall *p_krb5_free_ticket)(krb5_context,
187 static krb5_error_code (_stdcall *p_krb5_rd_req)(krb5_context,
189 krb5_const krb5_data *,
190 krb5_const_principal,
191 krb5_keytab, krb5_flags *,
192 krb5_ticket **)=NULL;
193 static krb5_error_code (_stdcall *p_krb5_mk_req_extended)
194 (krb5_context, krb5_auth_context *,
195 krb5_const krb5_flags, krb5_data *, krb5_creds *,
197 static krb5_error_code (_stdcall *p_krb5_init_context)(krb5_context *)=NULL;
198 static void (_stdcall *p_krb5_free_context)(krb5_context)=NULL;
199 static krb5_error_code (_stdcall *p_krb5_cc_default)(krb5_context,
201 static krb5_error_code (_stdcall *p_krb5_sname_to_principal)
202 (krb5_context, krb5_const char *, krb5_const char *,
203 krb5_int32, krb5_principal *)=NULL;
204 static krb5_error_code (_stdcall *p_krb5_get_credentials)
205 (krb5_context, krb5_const krb5_flags, krb5_ccache,
206 krb5_creds *, krb5_creds **)=NULL;
207 static krb5_error_code (_stdcall *p_krb5_auth_con_init)
208 (krb5_context, krb5_auth_context *)=NULL;
209 static krb5_error_code (_stdcall *p_krb5_cc_get_principal)
210 (krb5_context context, krb5_ccache cache,
211 krb5_principal *principal)=NULL;
212 static krb5_error_code (_stdcall *p_krb5_auth_con_free)
213 (krb5_context, krb5_auth_context)=NULL;
214 static krb5_error_code (_stdcall *p_krb5_decrypt_tkt_part)
215 (krb5_context, krb5_const krb5_keyblock *,
217 static krb5_error_code (_stdcall *p_krb5_timeofday)
218 (krb5_context context, krb5_int32 *timeret)=NULL;
219 static krb5_error_code (_stdcall *p_krb5_rc_default)
220 (krb5_context context, krb5_rcache *rc)=NULL;
221 static krb5_error_code (_stdcall *p_krb5_rc_initialize)
222 (krb5_context context, krb5_rcache rc,
223 krb5_deltat lifespan)=NULL;
224 static krb5_error_code (_stdcall *p_krb5_rc_get_lifespan)
225 (krb5_context context, krb5_rcache rc,
226 krb5_deltat *lifespan)=NULL;
227 static krb5_error_code (_stdcall *p_krb5_rc_destroy)
228 (krb5_context context, krb5_rcache rc)=NULL;
229 static krb5_boolean (_stdcall *p_krb5_principal_compare)
230 (krb5_context, krb5_const_principal, krb5_const_principal)=NULL;
231 static size_t (_stdcall *p_krb5_checksum_size)(krb5_context context,krb5_cksumtype ctype)=NULL;
232 static krb5_boolean (_stdcall *p_valid_cksumtype)(krb5_cksumtype ctype)=NULL;
233 static krb5_error_code (_stdcall *p_krb5_kt_free_entry)
234 (krb5_context,krb5_keytab_entry * )=NULL;
235 static int krb5_loaded = 0; /* only attempt to initialize func ptrs once */
237 /* Function to Load the Kerberos 5 DLL and initialize function pointers */
244 hKRB5_32 = LoadLibrary("KRB5_32");
248 (FARPROC) p_krb5_free_data_contents =
249 GetProcAddress( hKRB5_32, "krb5_free_data_contents" );
250 (FARPROC) p_krb5_free_context =
251 GetProcAddress( hKRB5_32, "krb5_free_context" );
252 (FARPROC) p_krb5_auth_con_free =
253 GetProcAddress( hKRB5_32, "krb5_auth_con_free" );
254 (FARPROC) p_krb5_free_principal =
255 GetProcAddress( hKRB5_32, "krb5_free_principal" );
256 (FARPROC) p_krb5_mk_req_extended =
257 GetProcAddress( hKRB5_32, "krb5_mk_req_extended" );
258 (FARPROC) p_krb5_get_credentials =
259 GetProcAddress( hKRB5_32, "krb5_get_credentials" );
260 (FARPROC) p_krb5_cc_get_principal =
261 GetProcAddress( hKRB5_32, "krb5_cc_get_principal" );
262 (FARPROC) p_krb5_cc_default =
263 GetProcAddress( hKRB5_32, "krb5_cc_default" );
264 (FARPROC) p_krb5_sname_to_principal =
265 GetProcAddress( hKRB5_32, "krb5_sname_to_principal" );
266 (FARPROC) p_krb5_init_context =
267 GetProcAddress( hKRB5_32, "krb5_init_context" );
268 (FARPROC) p_krb5_free_ticket =
269 GetProcAddress( hKRB5_32, "krb5_free_ticket" );
270 (FARPROC) p_krb5_rd_req =
271 GetProcAddress( hKRB5_32, "krb5_rd_req" );
272 (FARPROC) p_krb5_principal_compare =
273 GetProcAddress( hKRB5_32, "krb5_principal_compare" );
274 (FARPROC) p_krb5_decrypt_tkt_part =
275 GetProcAddress( hKRB5_32, "krb5_decrypt_tkt_part" );
276 (FARPROC) p_krb5_timeofday =
277 GetProcAddress( hKRB5_32, "krb5_timeofday" );
278 (FARPROC) p_krb5_rc_default =
279 GetProcAddress( hKRB5_32, "krb5_rc_default" );
280 (FARPROC) p_krb5_rc_initialize =
281 GetProcAddress( hKRB5_32, "krb5_rc_initialize" );
282 (FARPROC) p_krb5_rc_get_lifespan =
283 GetProcAddress( hKRB5_32, "krb5_rc_get_lifespan" );
284 (FARPROC) p_krb5_rc_destroy =
285 GetProcAddress( hKRB5_32, "krb5_rc_destroy" );
286 (FARPROC) p_krb5_kt_default =
287 GetProcAddress( hKRB5_32, "krb5_kt_default" );
288 (FARPROC) p_krb5_kt_resolve =
289 GetProcAddress( hKRB5_32, "krb5_kt_resolve" );
290 (FARPROC) p_krb5_auth_con_init =
291 GetProcAddress( hKRB5_32, "krb5_auth_con_init" );
292 (FARPROC) p_valid_cksumtype =
293 GetProcAddress( hKRB5_32, "valid_cksumtype" );
294 (FARPROC) p_krb5_checksum_size =
295 GetProcAddress( hKRB5_32, "krb5_checksum_size" );
296 (FARPROC) p_krb5_kt_free_entry =
297 GetProcAddress( hKRB5_32, "krb5_kt_free_entry" );
300 /* Stubs for each function to be dynamicly loaded */
302 kssl_krb5_free_data_contents(krb5_context CO, krb5_data * data)
307 if ( p_krb5_free_data_contents )
308 p_krb5_free_data_contents(CO,data);
312 kssl_krb5_mk_req_extended (krb5_context CO,
313 krb5_auth_context * pACO,
314 krb5_const krb5_flags F,
322 if ( p_krb5_mk_req_extended )
323 return(p_krb5_mk_req_extended(CO,pACO,F,pD1,pC,pD2));
325 return KRB5KRB_ERR_GENERIC;
328 kssl_krb5_auth_con_init(krb5_context CO,
329 krb5_auth_context * pACO)
334 if ( p_krb5_auth_con_init )
335 return(p_krb5_auth_con_init(CO,pACO));
337 return KRB5KRB_ERR_GENERIC;
340 kssl_krb5_auth_con_free (krb5_context CO,
341 krb5_auth_context ACO)
346 if ( p_krb5_auth_con_free )
347 return(p_krb5_auth_con_free(CO,ACO));
349 return KRB5KRB_ERR_GENERIC;
352 kssl_krb5_get_credentials(krb5_context CO,
353 krb5_const krb5_flags F,
361 if ( p_krb5_get_credentials )
362 return(p_krb5_get_credentials(CO,F,CC,pCR,ppCR));
364 return KRB5KRB_ERR_GENERIC;
367 kssl_krb5_sname_to_principal(krb5_context CO,
368 krb5_const char * pC1,
369 krb5_const char * pC2,
371 krb5_principal * pPR)
376 if ( p_krb5_sname_to_principal )
377 return(p_krb5_sname_to_principal(CO,pC1,pC2,I,pPR));
379 return KRB5KRB_ERR_GENERIC;
383 kssl_krb5_cc_default(krb5_context CO,
389 if ( p_krb5_cc_default )
390 return(p_krb5_cc_default(CO,pCC));
392 return KRB5KRB_ERR_GENERIC;
396 kssl_krb5_init_context(krb5_context * pCO)
401 if ( p_krb5_init_context )
402 return(p_krb5_init_context(pCO));
404 return KRB5KRB_ERR_GENERIC;
408 kssl_krb5_free_context(krb5_context CO)
413 if ( p_krb5_free_context )
414 p_krb5_free_context(CO);
418 kssl_krb5_free_principal(krb5_context c, krb5_principal p)
423 if ( p_krb5_free_principal )
424 p_krb5_free_principal(c,p);
428 kssl_krb5_kt_resolve(krb5_context con,
429 krb5_const char * sz,
435 if ( p_krb5_kt_resolve )
436 return(p_krb5_kt_resolve(con,sz,kt));
438 return KRB5KRB_ERR_GENERIC;
442 kssl_krb5_kt_default(krb5_context con,
448 if ( p_krb5_kt_default )
449 return(p_krb5_kt_default(con,kt));
451 return KRB5KRB_ERR_GENERIC;
455 kssl_krb5_free_ticket(krb5_context con,
461 if ( p_krb5_free_ticket )
462 return(p_krb5_free_ticket(con,kt));
464 return KRB5KRB_ERR_GENERIC;
468 kssl_krb5_rd_req(krb5_context con, krb5_auth_context * pacon,
469 krb5_const krb5_data * data,
470 krb5_const_principal princ, krb5_keytab keytab,
471 krb5_flags * flags, krb5_ticket ** pptkt)
477 return(p_krb5_rd_req(con,pacon,data,princ,keytab,flags,pptkt));
479 return KRB5KRB_ERR_GENERIC;
483 krb5_principal_compare(krb5_context con, krb5_const_principal princ1,
484 krb5_const_principal princ2)
489 if ( p_krb5_principal_compare )
490 return(p_krb5_principal_compare(con,princ1,princ2));
492 return KRB5KRB_ERR_GENERIC;
496 krb5_decrypt_tkt_part(krb5_context con, krb5_const krb5_keyblock *keys,
502 if ( p_krb5_decrypt_tkt_part )
503 return(p_krb5_decrypt_tkt_part(con,keys,ticket));
505 return KRB5KRB_ERR_GENERIC;
509 krb5_timeofday(krb5_context con, krb5_int32 *timeret)
514 if ( p_krb5_timeofday )
515 return(p_krb5_timeofday(con,timeret));
517 return KRB5KRB_ERR_GENERIC;
521 krb5_rc_default(krb5_context con, krb5_rcache *rc)
526 if ( p_krb5_rc_default )
527 return(p_krb5_rc_default(con,rc));
529 return KRB5KRB_ERR_GENERIC;
533 krb5_rc_initialize(krb5_context con, krb5_rcache rc, krb5_deltat lifespan)
538 if ( p_krb5_rc_initialize )
539 return(p_krb5_rc_initialize(con, rc, lifespan));
541 return KRB5KRB_ERR_GENERIC;
545 krb5_rc_get_lifespan(krb5_context con, krb5_rcache rc, krb5_deltat *lifespanp)
550 if ( p_krb5_rc_get_lifespan )
551 return(p_krb5_rc_get_lifespan(con, rc, lifespanp));
553 return KRB5KRB_ERR_GENERIC;
557 krb5_rc_destroy(krb5_context con, krb5_rcache rc)
562 if ( p_krb5_rc_destroy )
563 return(p_krb5_rc_destroy(con, rc));
565 return KRB5KRB_ERR_GENERIC;
569 krb5_checksum_size(krb5_context context,krb5_cksumtype ctype)
574 if ( p_krb5_checksum_size )
575 return(p_krb5_checksum_size(context, ctype));
577 return KRB5KRB_ERR_GENERIC;
581 valid_cksumtype(krb5_cksumtype ctype)
586 if ( p_valid_cksumtype )
587 return(p_valid_cksumtype(ctype));
589 return KRB5KRB_ERR_GENERIC;
593 krb5_kt_free_entry(krb5_context con,krb5_keytab_entry * entry)
598 if ( p_krb5_kt_free_entry )
599 return(p_krb5_kt_free_entry(con,entry));
601 return KRB5KRB_ERR_GENERIC;
604 /* Structure definitions */
605 #ifndef NO_DEF_KRB5_CCACHE
607 #define krb5_x(ptr,args) ((ptr)?((*(ptr)) args):(abort(),1))
608 #define krb5_xc(ptr,args) ((ptr)?((*(ptr)) args):(abort(),(char*)0))
611 typedef krb5_pointer krb5_cc_cursor; /* cursor for sequential lookup */
613 typedef struct _krb5_ccache
616 struct _krb5_cc_ops FAR *ops;
620 typedef struct _krb5_cc_ops
624 char * (KRB5_CALLCONV *get_name)
625 (krb5_context, krb5_ccache);
626 krb5_error_code (KRB5_CALLCONV *resolve)
627 (krb5_context, krb5_ccache *, const char *);
628 krb5_error_code (KRB5_CALLCONV *gen_new)
629 (krb5_context, krb5_ccache *);
630 krb5_error_code (KRB5_CALLCONV *init)
631 (krb5_context, krb5_ccache, krb5_principal);
632 krb5_error_code (KRB5_CALLCONV *destroy)
633 (krb5_context, krb5_ccache);
634 krb5_error_code (KRB5_CALLCONV *close)
635 (krb5_context, krb5_ccache);
636 krb5_error_code (KRB5_CALLCONV *store)
637 (krb5_context, krb5_ccache, krb5_creds *);
638 krb5_error_code (KRB5_CALLCONV *retrieve)
639 (krb5_context, krb5_ccache,
640 krb5_flags, krb5_creds *, krb5_creds *);
641 krb5_error_code (KRB5_CALLCONV *get_princ)
642 (krb5_context, krb5_ccache, krb5_principal *);
643 krb5_error_code (KRB5_CALLCONV *get_first)
644 (krb5_context, krb5_ccache, krb5_cc_cursor *);
645 krb5_error_code (KRB5_CALLCONV *get_next)
646 (krb5_context, krb5_ccache,
647 krb5_cc_cursor *, krb5_creds *);
648 krb5_error_code (KRB5_CALLCONV *end_get)
649 (krb5_context, krb5_ccache, krb5_cc_cursor *);
650 krb5_error_code (KRB5_CALLCONV *remove_cred)
651 (krb5_context, krb5_ccache,
652 krb5_flags, krb5_creds *);
653 krb5_error_code (KRB5_CALLCONV *set_flags)
654 (krb5_context, krb5_ccache, krb5_flags);
656 #endif /* NO_DEF_KRB5_CCACHE */
659 kssl_krb5_cc_get_principal
660 (krb5_context context, krb5_ccache cache,
661 krb5_principal *principal)
663 if ( p_krb5_cc_get_principal )
664 return(p_krb5_cc_get_principal(context,cache,principal));
667 ((cache)->ops->get_princ,(context, cache, principal)));
670 #endif /* OPENSSL_SYS_WINDOWS || OPENSSL_SYS_WIN32 */
673 *kstring(char *string)
675 static char *null = "[NULL]";
677 return ((string == NULL)? null: string);
682 *knumber(int len, krb5_octet *contents)
684 static char buf[MAXKNUM+1];
687 BIO_snprintf(buf, MAXKNUM, "[%d] ", len);
689 for (i=0; i < len && MAXKNUM > strlen(buf)+3; i++)
691 BIO_snprintf(&buf[strlen(buf)], 3, "%02x", contents[i]);
698 /* Given KRB5 enctype (basically DES or 3DES), return
701 kssl_map_enc(krb5_enctype enctype)
705 case ENCTYPE_DES_CBC_CRC:
706 case ENCTYPE_DES_CBC_MD4:
707 case ENCTYPE_DES_CBC_MD5:
708 case ENCTYPE_DES_CBC_RAW:
709 #if ! defined(KRB5_MIT_OLD11)
710 case ENCTYPE_DES_HMAC_SHA1:
712 return (EVP_CIPHER *) EVP_des_cbc();
714 case ENCTYPE_DES3_CBC_SHA:
715 case ENCTYPE_DES3_CBC_RAW:
716 #if ! defined(KRB5_MIT_OLD11)
717 case ENCTYPE_DES3_CBC_SHA1:
719 return (EVP_CIPHER *) EVP_des_ede3_cbc();
721 default: return (EVP_CIPHER *) NULL;
727 /* Return true:1 if p "looks like" the start of the real authenticator
728 ** described in kssl_skip_confound() below. The ASN.1 pattern is
729 ** "62 xx 30 yy" (APPLICATION-2, SEQUENCE), where xx-yy =~ 2, and
730 ** xx and yy are possibly multi-byte length fields.
732 int kssl_test_confound(unsigned char *p)
737 if (*p++ != 0x62) return 0;
738 if (*p > 0x82) return 0;
740 case 0x82: p++; xx = (*p++ << 8); xx += *p++; break;
741 case 0x81: p++; xx = *p++; break;
743 default: xx = *p++; break;
745 if (*p++ != 0x30) return 0;
746 if (*p > 0x82) return 0;
748 case 0x82: p++; len+=2; yy = (*p++ << 8); yy += *p++; break;
749 case 0x81: p++; len++; yy = *p++; break;
751 default: yy = *p++; break;
754 return (xx - len == yy)? 1: 0;
757 /* Allocate, fill, and return cksumlens array of checksum lengths.
758 ** This array holds just the unique elements from the krb5_cksumarray[].
759 ** array[n] == 0 signals end of data.
761 ** The krb5_cksumarray[] was an internal variable that has since been
762 ** replaced by a more general method for storing the data. It should
763 ** not be used. Instead we use real API calls and make a guess for
764 ** what the highest assigned CKSUMTYPE_ constant is. As of 1.2.2
765 ** it is 0x000c (CKSUMTYPE_HMAC_SHA1_DES3). So we will use 0x0010.
767 int *populate_cksumlens(void)
769 int i, j, n = 0x0010+1;
770 static size_t *cklens = NULL;
773 if (!cklens && !(cklens = (size_t *) calloc(sizeof(int), n))) return NULL;
775 for (i=0; i < n; i++) {
776 if (!valid_cksumtype(i)) continue; /* array has holes */
777 for (j=0; j < n; j++) {
778 if (cklens[j] == 0) {
779 cklens[j] = krb5_checksum_size(NULL,i);
780 break; /* krb5 elem was new: add */
782 if (cklens[j] == krb5_checksum_size(NULL,i)) {
783 break; /* ignore duplicate elements */
787 #endif /* KRB5CHECKAUTH */
792 /* Return pointer to start of real authenticator within authenticator, or
793 ** return NULL on error.
794 ** Decrypted authenticator looks like this:
795 ** [0 or 8 byte confounder] [4-24 byte checksum] [real authent'r]
796 ** This hackery wouldn't be necessary if MIT KRB5 1.0.6 had the
797 ** krb5_auth_con_getcksumtype() function advertised in its krb5.h.
799 unsigned char *kssl_skip_confound(krb5_enctype etype, unsigned char *a)
801 int i, cklen, conlen;
802 static int *cksumlens = NULL;
803 unsigned char *test_auth;
805 conlen = (etype)? 8: 0;
807 if (!cksumlens && !(cksumlens = populate_cksumlens())) return NULL;
808 for (i=0; (cklen = cksumlens[i]) != 0; i++)
810 test_auth = a + conlen + cklen;
811 if (kssl_test_confound(test_auth)) return test_auth;
818 /* Set kssl_err error info when reason text is a simple string
819 ** kssl_err = struct { int reason; char text[KSSL_ERR_MAX+1]; }
822 kssl_err_set(KSSL_ERR *kssl_err, int reason, char *text)
824 if (kssl_err == NULL) return;
826 kssl_err->reason = reason;
827 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX, text);
832 /* Display contents of krb5_data struct, for debugging
835 print_krb5_data(char *label, krb5_data *kdata)
839 printf("%s[%d] ", label, kdata->length);
840 for (i=0; i < kdata->length; i++)
842 if (0 && isprint((int) kdata->data[i]))
843 printf( "%c ", kdata->data[i]);
845 printf( "%02x ", (unsigned char) kdata->data[i]);
851 /* Display contents of krb5_authdata struct, for debugging
854 print_krb5_authdata(char *label, krb5_authdata **adata)
858 printf("%s, authdata==0\n", label);
861 printf("%s [%p]\n", label, adata);
865 printf("%s[at%d:%d] ", label, adata->ad_type, adata->length);
866 for (i=0; i < adata->length; i++)
868 printf((isprint(adata->contents[i]))? "%c ": "%02x",
877 /* Display contents of krb5_keyblock struct, for debugging
880 print_krb5_keyblock(char *label, krb5_keyblock *keyblk)
886 printf("%s, keyblk==0\n", label);
890 printf("%s\n\t[et%d:%d]: ", label, keyblk->keytype,
891 keyblk->keyvalue->length);
892 for (i=0; i < keyblk->keyvalue->length; i++)
894 printf("%02x",(unsigned char *)(keyblk->keyvalue->contents)[i]);
898 printf("%s\n\t[et%d:%d]: ", label, keyblk->enctype, keyblk->length);
899 for (i=0; i < keyblk->length; i++)
901 printf("%02x",keyblk->contents[i]);
908 /* Display contents of krb5_principal_data struct, for debugging
909 ** (krb5_principal is typedef'd == krb5_principal_data *)
912 print_krb5_princ(char *label, krb5_principal_data *princ)
917 printf("%s principal Realm: ", label);
918 if (princ == NULL) return;
919 for (ui=0; ui < princ->realm.length; ui++) putchar(princ->realm.data[ui]);
920 printf(" (nametype %d) has %d strings:\n", princ->type,princ->length);
921 for (i=0; i < princ->length; i++)
923 printf("\t%d [%d]: ", i, princ->data[i].length);
924 for (uj=0; uj < princ->data[i].length; uj++) {
925 putchar(princ->data[i].data[uj]);
933 /* Given krb5 service (typically "kssl") and hostname in kssl_ctx,
934 ** Return encrypted Kerberos ticket for service @ hostname.
935 ** If authenp is non-NULL, also return encrypted authenticator,
936 ** whose data should be freed by caller.
937 ** (Originally was: Create Kerberos AP_REQ message for SSL Client.)
939 ** 19990628 VRS Started; Returns Kerberos AP_REQ message.
940 ** 20010409 VRS Modified for RFC2712; Returns enc tkt.
941 ** 20010606 VRS May also return optional authenticator.
944 kssl_cget_tkt( /* UPDATE */ KSSL_CTX *kssl_ctx,
945 /* OUT */ krb5_data **enc_ticketp,
946 /* UPDATE */ krb5_data *authenp,
947 /* OUT */ KSSL_ERR *kssl_err)
949 krb5_error_code krb5rc = KRB5KRB_ERR_GENERIC;
950 krb5_context krb5context = NULL;
951 krb5_auth_context krb5auth_context = NULL;
952 krb5_ccache krb5ccdef = NULL;
953 krb5_creds krb5creds, *krb5credsp = NULL;
954 krb5_data krb5_app_req;
956 kssl_err_set(kssl_err, 0, "");
957 memset((char *)&krb5creds, 0, sizeof(krb5creds));
961 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
962 "No kssl_ctx defined.\n");
965 else if (!kssl_ctx->service_host)
967 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
968 "kssl_ctx service_host undefined.\n");
972 if ((krb5rc = krb5_init_context(&krb5context)) != 0)
974 BIO_snprintf(kssl_err->text,KSSL_ERR_MAX,
975 "krb5_init_context() fails: %d\n", krb5rc);
976 kssl_err->reason = SSL_R_KRB5_C_INIT;
980 if ((krb5rc = krb5_sname_to_principal(krb5context,
981 kssl_ctx->service_host,
982 (kssl_ctx->service_name)? kssl_ctx->service_name: KRB5SVC,
983 KRB5_NT_SRV_HST, &krb5creds.server)) != 0)
985 BIO_snprintf(kssl_err->text,KSSL_ERR_MAX,
986 "krb5_sname_to_principal() fails for %s/%s\n",
987 kssl_ctx->service_host,
988 (kssl_ctx->service_name)? kssl_ctx->service_name:
990 kssl_err->reason = SSL_R_KRB5_C_INIT;
994 if ((krb5rc = krb5_cc_default(krb5context, &krb5ccdef)) != 0)
996 kssl_err_set(kssl_err, SSL_R_KRB5_C_CC_PRINC,
997 "krb5_cc_default fails.\n");
1001 if ((krb5rc = krb5_cc_get_principal(krb5context, krb5ccdef,
1002 &krb5creds.client)) != 0)
1004 kssl_err_set(kssl_err, SSL_R_KRB5_C_CC_PRINC,
1005 "krb5_cc_get_principal() fails.\n");
1009 if ((krb5rc = krb5_get_credentials(krb5context, 0, krb5ccdef,
1010 &krb5creds, &krb5credsp)) != 0)
1012 kssl_err_set(kssl_err, SSL_R_KRB5_C_GET_CRED,
1013 "krb5_get_credentials() fails.\n");
1017 *enc_ticketp = &krb5credsp->ticket;
1019 kssl_ctx->enctype = krb5credsp->session.keytype;
1021 kssl_ctx->enctype = krb5credsp->keyblock.enctype;
1024 krb5rc = KRB5KRB_ERR_GENERIC;
1025 /* caller should free data of krb5_app_req */
1026 /* 20010406 VRS deleted for real KerberosWrapper
1027 ** 20010605 VRS reinstated to offer Authenticator to KerberosWrapper
1029 krb5_app_req.length = 0;
1032 krb5_data krb5in_data;
1035 KRB5_APREQBODY *ap_req;
1037 authenp->length = 0;
1038 krb5in_data.data = NULL;
1039 krb5in_data.length = 0;
1040 if ((krb5rc = krb5_mk_req_extended(krb5context,
1041 &krb5auth_context, 0, &krb5in_data, krb5credsp,
1042 &krb5_app_req)) != 0)
1044 kssl_err_set(kssl_err, SSL_R_KRB5_C_MK_REQ,
1045 "krb5_mk_req_extended() fails.\n");
1049 arlen = krb5_app_req.length;
1050 p = krb5_app_req.data;
1051 ap_req = (KRB5_APREQBODY *) d2i_KRB5_APREQ(NULL, &p, arlen);
1054 authenp->length = i2d_KRB5_ENCDATA(
1055 ap_req->authenticator, NULL);
1056 if (authenp->length &&
1057 (authenp->data = malloc(authenp->length)))
1059 unsigned char *p = authenp->data;
1060 authenp->length = i2d_KRB5_ENCDATA(
1061 ap_req->authenticator, &p);
1065 if (ap_req) KRB5_APREQ_free((KRB5_APREQ *) ap_req);
1066 if (krb5_app_req.length)
1067 krb5_free_data_contents(krb5context,&krb5_app_req);
1070 if (kssl_ctx_setkey(kssl_ctx, &krb5credsp->session))
1072 kssl_err_set(kssl_err, SSL_R_KRB5_C_INIT,
1073 "kssl_ctx_setkey() fails.\n");
1076 if (kssl_ctx_setkey(kssl_ctx, &krb5credsp->keyblock))
1078 kssl_err_set(kssl_err, SSL_R_KRB5_C_INIT,
1079 "kssl_ctx_setkey() fails.\n");
1086 kssl_ctx_show(kssl_ctx);
1087 #endif /* KSSL_DEBUG */
1089 if (krb5creds.client) krb5_free_principal(krb5context,
1091 if (krb5creds.server) krb5_free_principal(krb5context,
1093 if (krb5auth_context) krb5_auth_con_free(krb5context,
1095 if (krb5context) krb5_free_context(krb5context);
1100 /* Given d2i_-decoded asn1ticket, allocate and return a new krb5_ticket.
1101 ** Return Kerberos error code and kssl_err struct on error.
1102 ** Allocates krb5_ticket and krb5_principal; caller should free these.
1104 ** 20010410 VRS Implemented krb5_decode_ticket() as
1105 ** old_krb5_decode_ticket(). Missing from MIT1.0.6.
1106 ** 20010615 VRS Re-cast as openssl/asn1 d2i_*() functions.
1107 ** Re-used some of the old krb5_decode_ticket()
1108 ** code here. This tkt should alloc/free just
1109 ** like the real thing.
1112 kssl_TKT2tkt( /* IN */ krb5_context krb5context,
1113 /* IN */ KRB5_TKTBODY *asn1ticket,
1114 /* OUT */ krb5_ticket **krb5ticket,
1115 /* OUT */ KSSL_ERR *kssl_err )
1117 krb5_error_code krb5rc = KRB5KRB_ERR_GENERIC;
1118 krb5_ticket *new5ticket = NULL;
1119 ASN1_GENERALSTRING *gstr_svc, *gstr_host;
1123 if (asn1ticket == NULL || asn1ticket->realm == NULL ||
1124 asn1ticket->sname == NULL ||
1125 asn1ticket->sname->namestring == NULL ||
1126 asn1ticket->sname->namestring->num < 2)
1128 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1129 "Null field in asn1ticket.\n");
1130 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1131 return KRB5KRB_ERR_GENERIC;
1134 if ((new5ticket = (krb5_ticket *) calloc(1, sizeof(krb5_ticket)))==NULL)
1136 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1137 "Unable to allocate new krb5_ticket.\n");
1138 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1139 return ENOMEM; /* or KRB5KRB_ERR_GENERIC; */
1142 gstr_svc = (ASN1_GENERALSTRING*)asn1ticket->sname->namestring->data[0];
1143 gstr_host = (ASN1_GENERALSTRING*)asn1ticket->sname->namestring->data[1];
1145 if ((krb5rc = kssl_build_principal_2(krb5context,
1146 &new5ticket->server,
1147 asn1ticket->realm->length, asn1ticket->realm->data,
1148 gstr_svc->length, gstr_svc->data,
1149 gstr_host->length, gstr_host->data)) != 0)
1152 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1153 "Error building ticket server principal.\n");
1154 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1155 return krb5rc; /* or KRB5KRB_ERR_GENERIC; */
1158 krb5_princ_type(krb5context, new5ticket->server) =
1159 asn1ticket->sname->nametype->data[0];
1160 new5ticket->enc_part.enctype = asn1ticket->encdata->etype->data[0];
1161 new5ticket->enc_part.kvno = asn1ticket->encdata->kvno->data[0];
1162 new5ticket->enc_part.ciphertext.length =
1163 asn1ticket->encdata->cipher->length;
1164 if ((new5ticket->enc_part.ciphertext.data =
1165 calloc(1, asn1ticket->encdata->cipher->length)) == NULL)
1168 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1169 "Error allocating cipher in krb5ticket.\n");
1170 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1171 return KRB5KRB_ERR_GENERIC;
1175 memcpy(new5ticket->enc_part.ciphertext.data,
1176 asn1ticket->encdata->cipher->data,
1177 asn1ticket->encdata->cipher->length);
1180 *krb5ticket = new5ticket;
1185 /* Given krb5 service name in KSSL_CTX *kssl_ctx (typically "kssl"),
1186 ** and krb5 AP_REQ message & message length,
1187 ** Return Kerberos session key and client principle
1188 ** to SSL Server in KSSL_CTX *kssl_ctx.
1190 ** 19990702 VRS Started.
1193 kssl_sget_tkt( /* UPDATE */ KSSL_CTX *kssl_ctx,
1194 /* IN */ krb5_data *indata,
1195 /* OUT */ krb5_ticket_times *ttimes,
1196 /* OUT */ KSSL_ERR *kssl_err )
1198 krb5_error_code krb5rc = KRB5KRB_ERR_GENERIC;
1199 static krb5_context krb5context = NULL;
1200 static krb5_auth_context krb5auth_context = NULL;
1201 krb5_ticket *krb5ticket = NULL;
1202 KRB5_TKTBODY *asn1ticket = NULL;
1204 krb5_keytab krb5keytab = NULL;
1205 krb5_keytab_entry kt_entry;
1206 krb5_principal krb5server;
1208 kssl_err_set(kssl_err, 0, "");
1212 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1213 "No kssl_ctx defined.\n");
1218 printf("in kssl_sget_tkt(%s)\n", kstring(kssl_ctx->service_name));
1219 #endif /* KSSL_DEBUG */
1221 if (!krb5context && (krb5rc = krb5_init_context(&krb5context)))
1223 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1224 "krb5_init_context() fails.\n");
1227 if (krb5auth_context &&
1228 (krb5rc = krb5_auth_con_free(krb5context, krb5auth_context)))
1230 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1231 "krb5_auth_con_free() fails.\n");
1234 else krb5auth_context = NULL;
1235 if (!krb5auth_context &&
1236 (krb5rc = krb5_auth_con_init(krb5context, &krb5auth_context)))
1238 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1239 "krb5_auth_con_init() fails.\n");
1243 if ((krb5rc = krb5_sname_to_principal(krb5context, NULL,
1244 (kssl_ctx->service_name)? kssl_ctx->service_name: KRB5SVC,
1245 KRB5_NT_SRV_HST, &krb5server)) != 0)
1247 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1248 "krb5_sname_to_principal() fails.\n");
1252 /* kssl_ctx->keytab_file == NULL ==> use Kerberos default
1254 if (kssl_ctx->keytab_file)
1256 krb5rc = krb5_kt_resolve(krb5context, kssl_ctx->keytab_file,
1260 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1261 "krb5_kt_resolve() fails.\n");
1267 krb5rc = krb5_kt_default(krb5context,&krb5keytab);
1270 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1271 "krb5_kt_default() fails.\n");
1276 /* Actual Kerberos5 krb5_recvauth() has initial conversation here
1277 ** o check KRB5_SENDAUTH_BADAUTHVERS
1278 ** unless KRB5_RECVAUTH_SKIP_VERSION
1279 ** o check KRB5_SENDAUTH_BADAPPLVERS
1280 ** o send "0" msg if all OK
1283 /* 20010411 was using AP_REQ instead of true KerberosWrapper
1285 ** if ((krb5rc = krb5_rd_req(krb5context, &krb5auth_context,
1286 ** &krb5in_data, krb5server, krb5keytab,
1287 ** &ap_option, &krb5ticket)) != 0) { Error }
1291 if ((asn1ticket = (KRB5_TKTBODY *) d2i_KRB5_TICKET(NULL, &p,
1292 (long) indata->length)) == NULL)
1294 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1295 "d2i_KRB5_TICKET() ASN.1 decode failure.\n");
1296 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1300 /* Was: krb5rc = krb5_decode_ticket(krb5in_data,&krb5ticket)) != 0) */
1301 if ((krb5rc = kssl_TKT2tkt(krb5context, asn1ticket, &krb5ticket,
1304 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1305 "Error converting ASN.1 ticket to krb5_ticket.\n");
1306 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1310 if (! krb5_principal_compare(krb5context, krb5server,
1311 krb5ticket->server)) {
1312 krb5rc = KRB5_PRINC_NOMATCH;
1313 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1314 "server principal != ticket principal\n");
1315 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1318 if ((krb5rc = krb5_kt_get_entry(krb5context, krb5keytab,
1319 krb5ticket->server, krb5ticket->enc_part.kvno,
1320 krb5ticket->enc_part.enctype, &kt_entry)) != 0) {
1321 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1322 "krb5_kt_get_entry() fails with %x.\n", krb5rc);
1323 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1326 if ((krb5rc = krb5_decrypt_tkt_part(krb5context, &kt_entry.key,
1327 krb5ticket)) != 0) {
1328 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1329 "krb5_decrypt_tkt_part() failed.\n");
1330 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1334 krb5_kt_free_entry(krb5context, &kt_entry);
1337 int i; krb5_address **paddr = krb5ticket->enc_part2->caddrs;
1338 printf("Decrypted ticket fields:\n");
1339 printf("\tflags: %X, transit-type: %X",
1340 krb5ticket->enc_part2->flags,
1341 krb5ticket->enc_part2->transited.tr_type);
1342 print_krb5_data("\ttransit-data: ",
1343 &(krb5ticket->enc_part2->transited.tr_contents));
1344 printf("\tcaddrs: %p, authdata: %p\n",
1345 krb5ticket->enc_part2->caddrs,
1346 krb5ticket->enc_part2->authorization_data);
1347 printf("\tcaddrs:\n");
1348 for (i=0; paddr[i] != NULL; i++)
1350 d.length=paddr[i]->length; d.data=paddr[i]->contents;
1351 print_krb5_data("\t\tIP: ", &d);
1353 printf("\tstart/auth/end times: %d / %d / %d\n",
1354 krb5ticket->enc_part2->times.starttime,
1355 krb5ticket->enc_part2->times.authtime,
1356 krb5ticket->enc_part2->times.endtime);
1358 #endif /* KSSL_DEBUG */
1361 krb5rc = KRB5_NO_TKT_SUPPLIED;
1362 if (!krb5ticket || !krb5ticket->enc_part2 ||
1363 !krb5ticket->enc_part2->client ||
1364 !krb5ticket->enc_part2->client->data ||
1365 !krb5ticket->enc_part2->session)
1367 kssl_err_set(kssl_err, SSL_R_KRB5_S_BAD_TICKET,
1368 "bad ticket from krb5_rd_req.\n");
1370 else if (kssl_ctx_setprinc(kssl_ctx, KSSL_CLIENT,
1371 &krb5ticket->enc_part2->client->realm,
1372 krb5ticket->enc_part2->client->data))
1374 kssl_err_set(kssl_err, SSL_R_KRB5_S_BAD_TICKET,
1375 "kssl_ctx_setprinc() fails.\n");
1377 else if (kssl_ctx_setkey(kssl_ctx, krb5ticket->enc_part2->session))
1379 kssl_err_set(kssl_err, SSL_R_KRB5_S_BAD_TICKET,
1380 "kssl_ctx_setkey() fails.\n");
1382 else if (krb5ticket->enc_part2->flags & TKT_FLG_INVALID)
1384 krb5rc = KRB5KRB_AP_ERR_TKT_INVALID;
1385 kssl_err_set(kssl_err, SSL_R_KRB5_S_BAD_TICKET,
1386 "invalid ticket from krb5_rd_req.\n");
1390 kssl_ctx->enctype = krb5ticket->enc_part.enctype;
1391 ttimes->authtime = krb5ticket->enc_part2->times.authtime;
1392 ttimes->starttime = krb5ticket->enc_part2->times.starttime;
1393 ttimes->endtime = krb5ticket->enc_part2->times.endtime;
1394 ttimes->renew_till = krb5ticket->enc_part2->times.renew_till;
1398 kssl_ctx_show(kssl_ctx);
1399 #endif /* KSSL_DEBUG */
1401 if (asn1ticket) KRB5_TICKET_free((KRB5_TICKET *) asn1ticket);
1402 if (krb5keytab) krb5_kt_close(krb5context, krb5keytab);
1403 if (krb5ticket) krb5_free_ticket(krb5context, krb5ticket);
1404 if (krb5server) krb5_free_principal(krb5context, krb5server);
1409 /* Allocate & return a new kssl_ctx struct.
1414 return ((KSSL_CTX *) calloc(1, sizeof(KSSL_CTX)));
1418 /* Frees a kssl_ctx struct and any allocated memory it holds.
1422 kssl_ctx_free(KSSL_CTX *kssl_ctx)
1424 if (kssl_ctx == NULL) return kssl_ctx;
1426 if (kssl_ctx->key) memset(kssl_ctx->key, 0,
1428 if (kssl_ctx->key) free(kssl_ctx->key);
1429 if (kssl_ctx->client_princ) free(kssl_ctx->client_princ);
1430 if (kssl_ctx->service_host) free(kssl_ctx->service_host);
1431 if (kssl_ctx->service_name) free(kssl_ctx->service_name);
1432 if (kssl_ctx->keytab_file) free(kssl_ctx->keytab_file);
1435 return (KSSL_CTX *) NULL;
1439 /* Given a (krb5_data *) entity (and optional realm),
1440 ** set the plain (char *) client_princ or service_host member
1441 ** of the kssl_ctx struct.
1444 kssl_ctx_setprinc(KSSL_CTX *kssl_ctx, int which,
1445 krb5_data *realm, krb5_data *entity)
1450 if (kssl_ctx == NULL || entity == NULL) return KSSL_CTX_ERR;
1454 case KSSL_CLIENT: princ = &kssl_ctx->client_princ; break;
1455 case KSSL_SERVER: princ = &kssl_ctx->service_host; break;
1456 default: return KSSL_CTX_ERR; break;
1458 if (*princ) free(*princ);
1460 length = entity->length + ((realm)? realm->length + 2: 1);
1461 if ((*princ = calloc(1, length)) == NULL)
1462 return KSSL_CTX_ERR;
1465 strncpy(*princ, entity->data, entity->length);
1468 strcat (*princ, "@");
1469 (void) strncat(*princ, realm->data, realm->length);
1477 /* Set one of the plain (char *) string members of the kssl_ctx struct.
1478 ** Default values should be:
1479 ** which == KSSL_SERVICE => "khost" (KRB5SVC)
1480 ** which == KSSL_KEYTAB => "/etc/krb5.keytab" (KRB5KEYTAB)
1483 kssl_ctx_setstring(KSSL_CTX *kssl_ctx, int which, char *text)
1487 if (!kssl_ctx) return KSSL_CTX_ERR;
1491 case KSSL_SERVICE: string = &kssl_ctx->service_name; break;
1492 case KSSL_SERVER: string = &kssl_ctx->service_host; break;
1493 case KSSL_CLIENT: string = &kssl_ctx->client_princ; break;
1494 case KSSL_KEYTAB: string = &kssl_ctx->keytab_file; break;
1495 default: return KSSL_CTX_ERR; break;
1497 if (*string) free(*string);
1505 if ((*string = calloc(1, strlen(text) + 1)) == NULL)
1506 return KSSL_CTX_ERR;
1508 strcpy(*string, text);
1514 /* Copy the Kerberos session key from a (krb5_keyblock *) to a kssl_ctx
1515 ** struct. Clear kssl_ctx->key if Kerberos session key is NULL.
1518 kssl_ctx_setkey(KSSL_CTX *kssl_ctx, krb5_keyblock *session)
1521 krb5_enctype enctype;
1522 krb5_octet FAR *contents = NULL;
1524 if (!kssl_ctx) return KSSL_CTX_ERR;
1528 memset(kssl_ctx->key, 0, kssl_ctx->length);
1529 free(kssl_ctx->key);
1536 length = session->keyvalue->length;
1537 enctype = session->keytype;
1538 contents = session->keyvalue->contents;
1540 length = session->length;
1541 enctype = session->enctype;
1542 contents = session->contents;
1544 kssl_ctx->enctype = enctype;
1545 kssl_ctx->length = length;
1549 kssl_ctx->enctype = ENCTYPE_UNKNOWN;
1550 kssl_ctx->length = 0;
1554 if ((kssl_ctx->key =
1555 (krb5_octet FAR *) calloc(1, kssl_ctx->length)) == NULL)
1557 kssl_ctx->length = 0;
1558 return KSSL_CTX_ERR;
1561 memcpy(kssl_ctx->key, contents, length);
1567 /* Display contents of kssl_ctx struct
1570 kssl_ctx_show(KSSL_CTX *kssl_ctx)
1574 printf("kssl_ctx: ");
1575 if (kssl_ctx == NULL)
1581 printf("%p\n", kssl_ctx);
1583 printf("\tservice:\t%s\n",
1584 (kssl_ctx->service_name)? kssl_ctx->service_name: "NULL");
1585 printf("\tclient:\t%s\n",
1586 (kssl_ctx->client_princ)? kssl_ctx->client_princ: "NULL");
1587 printf("\tserver:\t%s\n",
1588 (kssl_ctx->service_host)? kssl_ctx->service_host: "NULL");
1589 printf("\tkeytab:\t%s\n",
1590 (kssl_ctx->keytab_file)? kssl_ctx->keytab_file: "NULL");
1591 printf("\tkey [%d:%d]:\t",
1592 kssl_ctx->enctype, kssl_ctx->length);
1594 for (i=0; i < kssl_ctx->length && kssl_ctx->key; i++)
1596 printf("%02x", kssl_ctx->key[i]);
1602 #if !defined(OPENSSL_SYS_WINDOWS) && !defined(OPENSSL_SYS_WIN32)
1603 void kssl_krb5_free_data_contents(krb5_context context, krb5_data *data)
1607 free(data->if (data->data) data);
1608 #elif defined(KRB5_MIT_OLD11)
1610 krb5_xfree(data->data);
1614 krb5_free_data_contents(NULL, data);
1617 #endif /* !OPENSSL_SYS_WINDOWS && !OPENSSL_SYS_WIN32 */
1619 /* Helper function for kssl_validate_times().
1620 ** We need context->clockskew, but krb5_context is an opaque struct.
1621 ** So we try to sneek the clockskew out through the replay cache.
1622 ** If that fails just return a likely default (300 seconds).
1624 krb5_deltat get_rc_clockskew(krb5_context context)
1627 krb5_deltat clockskew;
1629 if (krb5_rc_default(context, &rc)) return KSSL_CLOCKSKEW;
1630 if (krb5_rc_initialize(context, rc, 0)) return KSSL_CLOCKSKEW;
1631 if (krb5_rc_get_lifespan(context, rc, &clockskew)) {
1632 clockskew = KSSL_CLOCKSKEW;
1634 (void) krb5_rc_destroy(context, rc);
1639 /* kssl_validate_times() combines (and more importantly exposes)
1640 ** the MIT KRB5 internal function krb5_validate_times() and the
1641 ** in_clock_skew() macro. The authenticator client time is checked
1642 ** to be within clockskew secs of the current time and the current
1643 ** time is checked to be within the ticket start and expire times.
1644 ** Either check may be omitted by supplying a NULL value.
1645 ** Returns 0 for valid times, SSL_R_KRB5* error codes otherwise.
1646 ** See Also: (Kerberos source)/krb5/lib/krb5/krb/valid_times.c
1649 krb5_error_code kssl_validate_times( krb5_timestamp atime,
1650 krb5_ticket_times *ttimes)
1653 krb5_timestamp start, now;
1655 krb5_context context;
1657 if ((rc = krb5_init_context(&context))) return SSL_R_KRB5_S_BAD_TICKET;
1658 skew = get_rc_clockskew(context);
1659 if ((rc = krb5_timeofday(context,&now))) return SSL_R_KRB5_S_BAD_TICKET;
1660 krb5_free_context(context);
1662 if (atime && labs(atime - now) >= skew) return SSL_R_KRB5_S_TKT_SKEW;
1664 if (! ttimes) return 0;
1666 start = (ttimes->starttime != 0)? ttimes->starttime: ttimes->authtime;
1667 if (start - now > skew) return SSL_R_KRB5_S_TKT_NYV;
1668 if ((now - ttimes->endtime) > skew) return SSL_R_KRB5_S_TKT_EXPIRED;
1671 printf("kssl_validate_times: %d |<- | %d - %d | < %d ->| %d\n",
1672 start, atime, now, skew, ttimes->endtime);
1673 #endif /* KSSL_DEBUG */
1679 /* Decode and decrypt given DER-encoded authenticator, then pass
1680 ** authenticator ctime back in *atimep (or 0 if time unavailable).
1681 ** Returns krb5_error_code and kssl_err on error. A NULL
1682 ** authenticator (authentp->length == 0) is not considered an error.
1683 ** Note that kssl_check_authent() makes use of the KRB5 session key;
1684 ** you must call kssl_sget_tkt() to get the key before calling this routine.
1686 krb5_error_code kssl_check_authent(
1687 /* IN */ KSSL_CTX *kssl_ctx,
1688 /* IN */ krb5_data *authentp,
1689 /* OUT */ krb5_timestamp *atimep,
1690 /* OUT */ KSSL_ERR *kssl_err )
1692 krb5_error_code krb5rc = 0;
1693 KRB5_ENCDATA *dec_authent = NULL;
1694 KRB5_AUTHENTBODY *auth = NULL;
1695 krb5_enctype enctype;
1696 EVP_CIPHER_CTX ciph_ctx;
1697 EVP_CIPHER *enc = NULL;
1698 unsigned char iv[EVP_MAX_IV_LENGTH];
1699 unsigned char *p, *unenc_authent, *tbuf = NULL;
1700 int padl, outl, unencbufsize;
1703 kssl_err_set(kssl_err, 0, "");
1705 #ifndef KRB5CHECKAUTH
1708 #if KRB5CHECKAUTH == 0
1711 #endif /* KRB5CHECKAUTH */
1713 if (authentp == NULL || authentp->length == 0) return 0;
1716 printf("kssl_check_authent: authenticator[%d]:\n",authentp->length);
1718 for (padl=0; padl < authentp->length; padl++) printf("%02x ",p[padl]);
1720 #endif /* KSSL_DEBUG */
1722 unencbufsize = 2 * authentp->length;
1723 if ((unenc_authent = calloc(1, unencbufsize)) == NULL)
1725 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1726 "Unable to allocate authenticator buffer.\n");
1727 krb5rc = KRB5KRB_ERR_GENERIC;
1732 if ((dec_authent = d2i_KRB5_ENCDATA(NULL, &p,
1733 (long) authentp->length)) == NULL)
1735 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1736 "Error decoding authenticator.\n");
1737 krb5rc = KRB5KRB_AP_ERR_BAD_INTEGRITY;
1741 enctype = dec_authent->etype->data[0]; /* should = kssl_ctx->enctype */
1742 enc = kssl_map_enc(enctype);
1743 memset(iv, 0, EVP_MAX_IV_LENGTH); /* per RFC 1510 */
1745 EVP_DecryptInit(&ciph_ctx, enc, kssl_ctx->key, iv);
1746 EVP_DecryptUpdate(&ciph_ctx, unenc_authent, &outl,
1747 dec_authent->cipher->data, dec_authent->cipher->length);
1748 if (outl > unencbufsize)
1750 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1751 "Buffer overflow decrypting authenticator.\n");
1752 krb5rc = KRB5KRB_AP_ERR_BAD_INTEGRITY;
1755 EVP_DecryptFinal(&ciph_ctx, &(unenc_authent[outl]), &padl);
1757 if (outl > unencbufsize)
1759 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1760 "Buffer overflow decrypting authenticator.\n");
1761 krb5rc = KRB5KRB_AP_ERR_BAD_INTEGRITY;
1764 EVP_CIPHER_CTX_cleanup(&ciph_ctx);
1767 printf("kssl_check_authent: decrypted authenticator[%d] =\n", outl);
1768 for (padl=0; padl < outl; padl++) printf("%02x ",unenc_authent[padl]);
1770 #endif /* KSSL_DEBUG */
1772 if ((p = kssl_skip_confound(enctype, unenc_authent)) == NULL)
1774 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1775 "confounded by authenticator.\n");
1776 krb5rc = KRB5KRB_AP_ERR_BAD_INTEGRITY;
1779 outl -= p - unenc_authent;
1781 if ((auth = (KRB5_AUTHENTBODY *) d2i_KRB5_AUTHENT(NULL, &p,
1782 (long) outl))==NULL)
1784 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1785 "Error decoding authenticator body.\n");
1786 krb5rc = KRB5KRB_AP_ERR_BAD_INTEGRITY;
1789 if ((tbuf = calloc(1, auth->ctime->length + 1)) == NULL)
1791 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1792 "Unable to allocate atime buffer.\n");
1793 krb5rc = KRB5KRB_ERR_GENERIC;
1796 else strncpy(tbuf, auth->ctime->data, auth->ctime->length);
1798 if ( auth->ctime->length >= 9 && auth->ctime->length <= 14 )
1799 /* tbuf == "%Y%m%d%H%M%S" */
1801 struct tm tm_time, *tm_l, *tm_g;
1802 time_t now, tl, tg, tr, tz_offset;
1806 memset(&tm_time,0,sizeof(struct tm));
1810 tm_time.tm_year = tm_time.tm_year*10 + (*p-'0');
1812 i<2 && isdigit(*p) && tm_time.tm_mon <= 1;
1814 tm_time.tm_mon = tm_time.tm_mon*10 + (*p-'0');
1816 i<2 && isdigit(*p) && tm_time.tm_mday <= 3;
1818 tm_time.tm_mday = tm_time.tm_mday*10 + (*p-'0');
1820 i<2 && isdigit(*p) && tm_time.tm_hour <= 2;
1822 tm_time.tm_hour = tm_time.tm_hour*10 + (*p-'0');
1824 i<2 && isdigit(*p) && tm_time.tm_min <= 6;
1826 tm_time.tm_min = tm_time.tm_min*10 + (*p-'0');
1828 i<2 && isdigit(*p) && tm_time.tm_sec <= 6;
1830 tm_time.tm_sec = tm_time.tm_sec*10 + (*p-'0');
1833 tm_l = localtime(&now); tl = mktime(tm_l);
1834 tm_g = gmtime(&now); tg = mktime(tm_g);
1835 tz_offset = tg - tl;
1836 tr = mktime(&tm_time);
1838 if (tr != (time_t)(-1))
1839 *atimep = mktime(&tm_time) - tz_offset;
1842 printf("kssl_check_authent: client time %s = %d\n", tbuf, *atimep);
1843 #endif /* KSSL_DEBUG */
1846 if (tbuf) free(tbuf);
1847 if (auth) KRB5_AUTHENT_free((KRB5_AUTHENT *) auth);
1848 if (dec_authent) KRB5_ENCDATA_free(dec_authent);
1849 if (unenc_authent) free(unenc_authent);
1854 /* Replaces krb5_build_principal_ext(), with varargs length == 2 (svc, host),
1855 ** because I dont't know how to stub varargs.
1856 ** Returns krb5_error_code == ENOMEM on alloc error, otherwise
1857 ** passes back newly constructed principal, which should be freed by caller.
1859 krb5_error_code kssl_build_principal_2(
1860 /* UPDATE */ krb5_context context,
1861 /* OUT */ krb5_principal *princ,
1862 /* IN */ int rlen, const char *realm,
1863 /* IN */ int slen, const char *svc,
1864 /* IN */ int hlen, const char *host)
1866 krb5_data *p_data = NULL;
1867 krb5_principal new_p = NULL;
1870 if ((p_data = (krb5_data *) calloc(2, sizeof(krb5_data))) == NULL ||
1871 (new_p = (krb5_principal) calloc(1, sizeof(krb5_principal_data)))
1874 new_p->data = p_data;
1876 if ((new_r = calloc(1, rlen + 1)) == NULL) goto err;
1877 memcpy(new_r, realm, rlen);
1878 krb5_princ_set_realm_length(context, new_p, rlen);
1879 krb5_princ_set_realm_data(context, new_p, new_r);
1881 if ((new_p->data[0].data = calloc(1, slen + 1)) == NULL) goto err;
1882 memcpy(new_p->data[0].data, svc, slen);
1883 new_p->data[0].length = slen;
1885 if ((new_p->data[1].data = calloc(1, hlen + 1)) == NULL) goto err;
1886 memcpy(new_p->data[1].data, host, hlen);
1887 new_p->data[1].length = hlen;
1889 krb5_princ_type(context, new_p) = KRB5_NT_UNKNOWN;
1894 if (new_p && new_p[0].data) free(new_p[0].data);
1895 if (new_p && new_p[1].data) free(new_p[1].data);
1896 if (new_p) free(new_p);
1897 if (new_r) free(new_r);
1902 #else /* !OPENSSL_NO_KRB5 */
1904 #if defined(PEDANTIC) || defined(OPENSSL_SYS_VMS)
1905 static int dummy=(int)&dummy;
1908 #endif /* !OPENSSL_NO_KRB5 */