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_krb5_rc_initialize kssl_krb5_rc_initialize
124 #define krb5_krb5_rc_get_lifespan kssl_krb5_rc_get_lifespan
125 #define krb5_krb5_rc_destroy kssl_krb5_rc_destroy
127 /* Prototypes for built in stubs */
128 void kssl_krb5_free_data_contents(krb5_context, krb5_data *);
129 void kssl_krb5_free_principal(krb5_context, krb5_principal );
130 krb5_error_code kssl_krb5_kt_resolve(krb5_context,
133 krb5_error_code kssl_krb5_kt_default(krb5_context,
135 krb5_error_code kssl_krb5_free_ticket(krb5_context, krb5_ticket *);
136 krb5_error_code kssl_krb5_rd_req(krb5_context, krb5_auth_context *,
137 krb5_const krb5_data *,
138 krb5_const_principal, krb5_keytab,
139 krb5_flags *,krb5_ticket **);
141 krb5_boolean kssl_krb5_principal_compare(krb5_context, krb5_const_principal,
142 krb5_const_principal);
143 krb5_error_code krb5_decrypt_tkt_part(krb5_context, krb5_const krb5_keyblock *,
145 krb5_error_code krb5_timeofday(krb5_context context, krb5_int32 *timeret);
146 krb5_error_code krb5_rc_default(krb5_context context, krb5_rcache *rc);
147 krb5_error_code krb5_rc_initialize(krb5_context context, krb5_rcache rc,
148 krb5_deltat lifespan);
149 krb5_error_code krb5_rc_get_lifespan(krb5_context context, krb5_rcache rc,
150 krb5_deltat *lifespan);
151 krb5_error_code krb5_rc_destroy(krb5_context context, krb5_rcache rc);
153 krb5_error_code kssl_krb5_mk_req_extended(krb5_context,
155 krb5_const krb5_flags,
159 krb5_error_code kssl_krb5_init_context(krb5_context *);
160 void kssl_krb5_free_context(krb5_context);
161 krb5_error_code kssl_krb5_cc_default(krb5_context,krb5_ccache *);
162 krb5_error_code kssl_krb5_sname_to_principal(krb5_context,
167 krb5_error_code kssl_krb5_get_credentials(krb5_context,
168 krb5_const krb5_flags,
172 krb5_error_code kssl_krb5_auth_con_init(krb5_context,
173 krb5_auth_context *);
174 krb5_error_code kssl_krb5_cc_get_principal(krb5_context context,
176 krb5_principal *principal);
177 krb5_error_code kssl_krb5_auth_con_free(krb5_context,krb5_auth_context);
179 /* Function pointers (almost all Kerberos functions are _stdcall) */
180 static void (_stdcall *p_krb5_free_data_contents)(krb5_context, krb5_data *)
182 static void (_stdcall *p_krb5_free_principal)(krb5_context, krb5_principal )
184 static krb5_error_code(_stdcall *p_krb5_kt_resolve)
185 (krb5_context, krb5_const char *, krb5_keytab *)=NULL;
186 static krb5_error_code (_stdcall *p_krb5_kt_default)(krb5_context,
188 static krb5_error_code (_stdcall *p_krb5_free_ticket)(krb5_context,
190 static krb5_error_code (_stdcall *p_krb5_rd_req)(krb5_context,
192 krb5_const krb5_data *,
193 krb5_const_principal,
194 krb5_keytab, krb5_flags *,
195 krb5_ticket **)=NULL;
196 static krb5_error_code (_stdcall *p_krb5_mk_req_extended)
197 (krb5_context, krb5_auth_context *,
198 krb5_const krb5_flags, krb5_data *, krb5_creds *,
200 static krb5_error_code (_stdcall *p_krb5_init_context)(krb5_context *)=NULL;
201 static void (_stdcall *p_krb5_free_context)(krb5_context)=NULL;
202 static krb5_error_code (_stdcall *p_krb5_cc_default)(krb5_context,
204 static krb5_error_code (_stdcall *p_krb5_sname_to_principal)
205 (krb5_context, krb5_const char *, krb5_const char *,
206 krb5_int32, krb5_principal *)=NULL;
207 static krb5_error_code (_stdcall *p_krb5_get_credentials)
208 (krb5_context, krb5_const krb5_flags, krb5_ccache,
209 krb5_creds *, krb5_creds **)=NULL;
210 static krb5_error_code (_stdcall *p_krb5_auth_con_init)
211 (krb5_context, krb5_auth_context *)=NULL;
212 static krb5_error_code (_stdcall *p_krb5_cc_get_principal)
213 (krb5_context context, krb5_ccache cache,
214 krb5_principal *principal)=NULL;
215 static krb5_error_code (_stdcall *p_krb5_auth_con_free)
216 (krb5_context, krb5_auth_context)=NULL;
217 static int krb5_loaded = 0; /* only attempt to initialize func ptrs once */
219 /* Function to Load the Kerberos 5 DLL and initialize function pointers */
226 hKRB5_32 = LoadLibrary("KRB5_32");
230 (FARPROC) p_krb5_free_data_contents =
231 GetProcAddress( hKRB5_32, "krb5_free_data_contents" );
232 (FARPROC) p_krb5_free_context =
233 GetProcAddress( hKRB5_32, "krb5_free_context" );
234 (FARPROC) p_krb5_auth_con_free =
235 GetProcAddress( hKRB5_32, "krb5_auth_con_free" );
236 (FARPROC) p_krb5_free_principal =
237 GetProcAddress( hKRB5_32, "krb5_free_principal" );
238 (FARPROC) p_krb5_mk_req_extended =
239 GetProcAddress( hKRB5_32, "krb5_mk_req_extended" );
240 (FARPROC) p_krb5_get_credentials =
241 GetProcAddress( hKRB5_32, "krb5_get_credentials" );
242 (FARPROC) p_krb5_cc_get_principal =
243 GetProcAddress( hKRB5_32, "krb5_cc_get_principal" );
244 (FARPROC) p_krb5_cc_default =
245 GetProcAddress( hKRB5_32, "krb5_cc_default" );
246 (FARPROC) p_krb5_sname_to_principal =
247 GetProcAddress( hKRB5_32, "krb5_sname_to_principal" );
248 (FARPROC) p_krb5_init_context =
249 GetProcAddress( hKRB5_32, "krb5_init_context" );
250 (FARPROC) p_krb5_free_ticket =
251 GetProcAddress( hKRB5_32, "krb5_free_ticket" );
252 (FARPROC) p_krb5_rd_req =
253 GetProcAddress( hKRB5_32, "krb5_rd_req" );
254 (FARPROC) p_krb5_principal_compare =
255 GetProcAddress( hKRB5_32, "krb5_principal_compare" );
256 (FARPROC) p_krb5_decrypt_tkt_part =
257 GetProcAddress( hKRB5_32, "krb5_decrypt_tkt_part" );
258 (FARPROC) p_krb5_timeofday =
259 GetProcAddress( hKRB5_32, "krb5_timeofday" );
260 (FARPROC) p_krb5_rc_default =
261 GetProcAddress( hKRB5_32, "krb5_rc_default" );
262 (FARPROC) p_krb5_rc_initialize =
263 GetProcAddress( hKRB5_32, "krb5_rc_initialize" );
264 (FARPROC) p_krb5_rc_get_lifespan =
265 GetProcAddress( hKRB5_32, "krb5_rc_get_lifespan" );
266 (FARPROC) p_krb5_rc_destroy =
267 GetProcAddress( hKRB5_32, "krb5_rc_destroy" );
268 (FARPROC) p_krb5_kt_default =
269 GetProcAddress( hKRB5_32, "krb5_kt_default" );
270 (FARPROC) p_krb5_kt_resolve =
271 GetProcAddress( hKRB5_32, "krb5_kt_resolve" );
272 (FARPROC) p_krb5_auth_con_init =
273 GetProcAddress( hKRB5_32, "krb5_auth_con_init" );
276 /* Stubs for each function to be dynamicly loaded */
278 kssl_krb5_free_data_contents(krb5_context CO, krb5_data * data)
283 if ( p_krb5_free_data_contents )
284 p_krb5_free_data_contents(CO,data);
288 kssl_krb5_mk_req_extended (krb5_context CO,
289 krb5_auth_context * pACO,
290 krb5_const krb5_flags F,
298 if ( p_krb5_mk_req_extended )
299 return(p_krb5_mk_req_extended(CO,pACO,F,pD1,pC,pD2));
301 return KRB5KRB_ERR_GENERIC;
304 kssl_krb5_auth_con_init(krb5_context CO,
305 krb5_auth_context * pACO)
310 if ( p_krb5_auth_con_init )
311 return(p_krb5_auth_con_init(CO,pACO));
313 return KRB5KRB_ERR_GENERIC;
316 kssl_krb5_auth_con_free (krb5_context CO,
317 krb5_auth_context ACO)
322 if ( p_krb5_auth_con_free )
323 return(p_krb5_auth_con_free(CO,ACO));
325 return KRB5KRB_ERR_GENERIC;
328 kssl_krb5_get_credentials(krb5_context CO,
329 krb5_const krb5_flags F,
337 if ( p_krb5_get_credentials )
338 return(p_krb5_get_credentials(CO,F,CC,pCR,ppCR));
340 return KRB5KRB_ERR_GENERIC;
343 kssl_krb5_sname_to_principal(krb5_context CO,
344 krb5_const char * pC1,
345 krb5_const char * pC2,
347 krb5_principal * pPR)
352 if ( p_krb5_sname_to_principal )
353 return(p_krb5_sname_to_principal(CO,pC1,pC2,I,pPR));
355 return KRB5KRB_ERR_GENERIC;
359 kssl_krb5_cc_default(krb5_context CO,
365 if ( p_krb5_cc_default )
366 return(p_krb5_cc_default(CO,pCC));
368 return KRB5KRB_ERR_GENERIC;
372 kssl_krb5_init_context(krb5_context * pCO)
377 if ( p_krb5_init_context )
378 return(p_krb5_init_context(pCO));
380 return KRB5KRB_ERR_GENERIC;
384 kssl_krb5_free_context(krb5_context CO)
389 if ( p_krb5_free_context )
390 p_krb5_free_context(CO);
394 kssl_krb5_free_principal(krb5_context c, krb5_principal p)
399 if ( p_krb5_free_principal )
400 p_krb5_free_principal(c,p);
404 kssl_krb5_kt_resolve(krb5_context con,
405 krb5_const char * sz,
411 if ( p_krb5_kt_resolve )
412 return(p_krb5_kt_resolve(con,sz,kt));
414 return KRB5KRB_ERR_GENERIC;
418 kssl_krb5_kt_default(krb5_context con,
424 if ( p_krb5_kt_default )
425 return(p_krb5_kt_default(con,kt));
427 return KRB5KRB_ERR_GENERIC;
431 kssl_krb5_free_ticket(krb5_context con,
437 if ( p_krb5_free_ticket )
438 return(p_krb5_free_ticket(con,kt));
440 return KRB5KRB_ERR_GENERIC;
444 kssl_krb5_rd_req(krb5_context con, krb5_auth_context * pacon,
445 krb5_const krb5_data * data,
446 krb5_const_principal princ, krb5_keytab keytab,
447 krb5_flags * flags, krb5_ticket ** pptkt)
453 return(p_krb5_rd_req(con,pacon,data,princ,keytab,flags,pptkt));
455 return KRB5KRB_ERR_GENERIC;
459 krb5_principal_compare(krb5_context con, krb5_const_principal princ1,
460 krb5_const_principal princ2)
465 if ( p_krb5_principal_compare )
466 return(p_krb5_principal_compare(con,princ1,princ2);
468 return KRB5KRB_ERR_GENERIC;
472 krb5_decrypt_tkt_part(krb5_context con, krb5_const krb5_keyblock *keys,
478 if ( p_krb5_decrypt_tkt_part )
479 return(p_krb5_decrypt_tkt_part(con,keys,ticket);
481 return KRB5KRB_ERR_GENERIC;
485 krb5_timeofday(krb5_context con, krb5_int32 *timeret)
490 if ( p_krb5_timeofday )
491 return(p_krb5_timeofday(con,timeret);
493 return KRB5KRB_ERR_GENERIC;
497 krb5_rc_default(krb5_context con, krb5_rcache *rc)
502 if ( p_krb5_rc_default )
503 return(p_krb5_rc_default(con,rc);
505 return KRB5KRB_ERR_GENERIC;
509 krb5_rc_initialize(krb5_context con, krb5_rcache rc, krb5_deltat lifespan)
514 if ( p_krb5_rc_initialize )
515 return(p_krb5_rc_initialize(con, rc, lifespan);
517 return KRB5KRB_ERR_GENERIC;
521 krb5_rc_get_lifespan(krb5_context con, krb5_rcache rc, krb5_deltat *lifespanp)
526 if ( p_krb5_rc_get_lifespan )
527 return(p_krb5_rc_get_lifespan(con, rc, lifespanp);
529 return KRB5KRB_ERR_GENERIC;
533 krb5_rc_destroy(krb5_context con, krb5_rcache rc)
538 if ( p_krb5_rc_destroy )
539 return(p_krb5_rc_destroy(con, rc);
541 return KRB5KRB_ERR_GENERIC;
544 /* Structure definitions */
545 #ifndef NO_DEF_KRB5_CCACHE
547 #define krb5_x(ptr,args) ((ptr)?((*(ptr)) args):(abort(),1))
548 #define krb5_xc(ptr,args) ((ptr)?((*(ptr)) args):(abort(),(char*)0))
551 typedef krb5_pointer krb5_cc_cursor; /* cursor for sequential lookup */
553 typedef struct _krb5_ccache
556 struct _krb5_cc_ops FAR *ops;
560 typedef struct _krb5_cc_ops
564 char * (KRB5_CALLCONV *get_name)
565 KRB5_NPROTOTYPE((krb5_context, krb5_ccache));
566 krb5_error_code (KRB5_CALLCONV *resolve)
567 KRB5_NPROTOTYPE((krb5_context, krb5_ccache *, const char *));
568 krb5_error_code (KRB5_CALLCONV *gen_new)
569 KRB5_NPROTOTYPE((krb5_context, krb5_ccache *));
570 krb5_error_code (KRB5_CALLCONV *init)
571 KRB5_NPROTOTYPE((krb5_context, krb5_ccache, krb5_principal));
572 krb5_error_code (KRB5_CALLCONV *destroy)
573 KRB5_NPROTOTYPE((krb5_context, krb5_ccache));
574 krb5_error_code (KRB5_CALLCONV *close)
575 KRB5_NPROTOTYPE((krb5_context, krb5_ccache));
576 krb5_error_code (KRB5_CALLCONV *store)
577 KRB5_NPROTOTYPE((krb5_context, krb5_ccache, krb5_creds *));
578 krb5_error_code (KRB5_CALLCONV *retrieve)
579 KRB5_NPROTOTYPE((krb5_context, krb5_ccache,
580 krb5_flags, krb5_creds *, krb5_creds *));
581 krb5_error_code (KRB5_CALLCONV *get_princ)
582 KRB5_NPROTOTYPE((krb5_context, krb5_ccache, krb5_principal *));
583 krb5_error_code (KRB5_CALLCONV *get_first)
584 KRB5_NPROTOTYPE((krb5_context, krb5_ccache, krb5_cc_cursor *));
585 krb5_error_code (KRB5_CALLCONV *get_next)
586 KRB5_NPROTOTYPE((krb5_context, krb5_ccache,
587 krb5_cc_cursor *, krb5_creds *));
588 krb5_error_code (KRB5_CALLCONV *end_get)
589 KRB5_NPROTOTYPE((krb5_context, krb5_ccache, krb5_cc_cursor *));
590 krb5_error_code (KRB5_CALLCONV *remove_cred)
591 KRB5_NPROTOTYPE((krb5_context, krb5_ccache,
592 krb5_flags, krb5_creds *));
593 krb5_error_code (KRB5_CALLCONV *set_flags)
594 KRB5_NPROTOTYPE((krb5_context, krb5_ccache, krb5_flags));
596 #endif /* NO_DEF_KRB5_CCACHE */
599 kssl_krb5_cc_get_principal
600 (krb5_context context, krb5_ccache cache,
601 krb5_principal *principal)
603 if ( p_krb5_cc_get_principal )
604 return(p_krb5_cc_get_principal(context,cache,principal));
607 ((cache)->ops->get_princ,(context, cache, principal)));
610 #endif /* OPENSSL_SYS_WINDOWS || OPENSSL_SYS_WIN32 */
613 *kstring(char *string)
615 static char *null = "[NULL]";
617 return ((string == NULL)? null: string);
622 *knumber(int len, krb5_octet *contents)
624 static char buf[MAXKNUM+1];
627 BIO_snprintf(buf, MAXKNUM, "[%d] ", len);
629 for (i=0; i < len && MAXKNUM > strlen(buf)+3; i++)
631 BIO_snprintf(&buf[strlen(buf)], 3, "%02x", contents[i]);
638 /* Given KRB5 enctype (basically DES or 3DES), return
641 kssl_map_enc(krb5_enctype enctype)
645 case ENCTYPE_DES_CBC_CRC:
646 case ENCTYPE_DES_CBC_MD4:
647 case ENCTYPE_DES_CBC_MD5:
648 case ENCTYPE_DES_CBC_RAW:
649 #if ! defined(KRB5_MIT_OLD11)
650 case ENCTYPE_DES_HMAC_SHA1:
652 return (EVP_CIPHER *) EVP_des_cbc();
654 case ENCTYPE_DES3_CBC_SHA:
655 case ENCTYPE_DES3_CBC_RAW:
656 #if ! defined(KRB5_MIT_OLD11)
657 case ENCTYPE_DES3_CBC_SHA1:
659 return (EVP_CIPHER *) EVP_des_ede3_cbc();
661 default: return (EVP_CIPHER *) NULL;
667 /* Return true:1 if p "looks like" the start of the real authenticator
668 ** described in kssl_skip_confound() below. The ASN.1 pattern is
669 ** "62 xx 30 yy" (APPLICATION-2, SEQUENCE), where xx-yy =~ 2, and
670 ** xx and yy are possibly multi-byte length fields.
672 int kssl_test_confound(unsigned char *p)
677 if (*p++ != 0x62) return 0;
678 if (*p > 0x82) return 0;
680 case 0x82: p++; xx = (*p++ << 8); xx += *p++; break;
681 case 0x81: p++; xx = *p++; break;
683 default: xx = *p++; break;
685 if (*p++ != 0x30) return 0;
686 if (*p > 0x82) return 0;
688 case 0x82: p++; len+=2; yy = (*p++ << 8); yy += *p++; break;
689 case 0x81: p++; len++; yy = *p++; break;
691 default: yy = *p++; break;
694 return (xx - len == yy)? 1: 0;
697 /* Allocate, fill, and return cksumlens array of checksum lengths.
698 ** This array holds just the unique elements from the krb5_cksumarray[].
699 ** array[n] == 0 signals end of data.
701 int *populate_cksumlens(void)
703 int i, j, n = krb5_max_cksum+1;
704 static int *cklens = NULL;
707 if (!cklens && !(cklens = (int *) calloc(sizeof(int), n))) return NULL;
709 for (i=0; i < krb5_max_cksum; i++) {
710 if (!krb5_cksumarray[i]) continue; /* array has holes */
711 for (j=0; j < krb5_max_cksum; j++) {
712 if (cklens[j] == 0) {
713 cklens[j] = krb5_cksumarray[i]->checksum_length;
714 break; /* krb5 elem was new: add */
716 if (cklens[j] == krb5_cksumarray[i]->checksum_length) {
717 break; /* ignore duplicate elements */
721 #endif /* KRB5CHECKAUTH */
726 /* Return pointer to start of real authenticator within authenticator, or
727 ** return NULL on error.
728 ** Decrypted authenticator looks like this:
729 ** [0 or 8 byte confounder] [4-24 byte checksum] [real authent'r]
730 ** This hackery wouldn't be necessary if MIT KRB5 1.0.6 had the
731 ** krb5_auth_con_getcksumtype() function advertised in its krb5.h.
733 unsigned char *kssl_skip_confound(krb5_enctype etype, unsigned char *a)
735 int i, cklen, conlen;
736 static int *cksumlens = NULL;
737 unsigned char *test_auth;
739 conlen = (etype)? 8: 0;
741 if (!cksumlens && !(cksumlens = populate_cksumlens())) return NULL;
742 for (i=0; (cklen = cksumlens[i]) != 0; i++)
744 test_auth = a + conlen + cklen;
745 if (kssl_test_confound(test_auth)) return test_auth;
752 /* Set kssl_err error info when reason text is a simple string
753 ** kssl_err = struct { int reason; char text[KSSL_ERR_MAX+1]; }
756 kssl_err_set(KSSL_ERR *kssl_err, int reason, char *text)
758 if (kssl_err == NULL) return;
760 kssl_err->reason = reason;
761 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX, text);
766 /* Display contents of krb5_data struct, for debugging
769 print_krb5_data(char *label, krb5_data *kdata)
773 printf("%s[%d] ", label, kdata->length);
774 for (i=0; i < kdata->length; i++)
776 if (0 && isprint((int) kdata->data[i]))
777 printf( "%c ", kdata->data[i]);
779 printf( "%02x ", (unsigned char) kdata->data[i]);
785 /* Display contents of krb5_authdata struct, for debugging
788 print_krb5_authdata(char *label, krb5_authdata **adata)
792 printf("%s, authdata==0\n", label);
795 printf("%s [%p]\n", label, adata);
799 printf("%s[at%d:%d] ", label, adata->ad_type, adata->length);
800 for (i=0; i < adata->length; i++)
802 printf((isprint(adata->contents[i]))? "%c ": "%02x",
811 /* Display contents of krb5_keyblock struct, for debugging
814 print_krb5_keyblock(char *label, krb5_keyblock *keyblk)
820 printf("%s, keyblk==0\n", label);
824 printf("%s\n\t[et%d:%d]: ", label, keyblk->keytype,
825 keyblk->keyvalue->length);
826 for (i=0; i < keyblk->keyvalue->length; i++)
828 printf("%02x",(unsigned char *)(keyblk->keyvalue->contents)[i]);
832 printf("%s\n\t[et%d:%d]: ", label, keyblk->enctype, keyblk->length);
833 for (i=0; i < keyblk->length; i++)
835 printf("%02x",keyblk->contents[i]);
842 /* Display contents of krb5_principal_data struct, for debugging
843 ** (krb5_principal is typedef'd == krb5_principal_data *)
846 print_krb5_princ(char *label, krb5_principal_data *princ)
850 printf("%s principal Realm: ", label);
851 if (princ == NULL) return;
852 for (i=0; i < princ->realm.length; i++) putchar(princ->realm.data[i]);
853 printf(" (nametype %d) has %d strings:\n", princ->type,princ->length);
854 for (i=0; i < princ->length; i++)
856 printf("\t%d [%d]: ", i, princ->data[i].length);
857 for (j=0; j < princ->data[i].length; j++) {
858 putchar(princ->data[i].data[j]);
866 /* Given krb5 service (typically "kssl") and hostname in kssl_ctx,
867 ** Return encrypted Kerberos ticket for service @ hostname.
868 ** If authenp is non-NULL, also return encrypted authenticator,
869 ** whose data should be freed by caller.
870 ** (Originally was: Create Kerberos AP_REQ message for SSL Client.)
872 ** 19990628 VRS Started; Returns Kerberos AP_REQ message.
873 ** 20010409 VRS Modified for RFC2712; Returns enc tkt.
874 ** 20010606 VRS May also return optional authenticator.
877 kssl_cget_tkt( /* UPDATE */ KSSL_CTX *kssl_ctx,
878 /* OUT */ krb5_data **enc_ticketp,
879 /* UPDATE */ krb5_data *authenp,
880 /* OUT */ KSSL_ERR *kssl_err)
882 krb5_error_code krb5rc = KRB5KRB_ERR_GENERIC;
883 krb5_context krb5context = NULL;
884 krb5_auth_context krb5auth_context = NULL;
885 krb5_ccache krb5ccdef = NULL;
886 krb5_creds krb5creds, *krb5credsp = NULL;
887 krb5_data krb5_app_req;
889 kssl_err_set(kssl_err, 0, "");
890 memset((char *)&krb5creds, 0, sizeof(krb5creds));
894 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
895 "No kssl_ctx defined.\n");
898 else if (!kssl_ctx->service_host)
900 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
901 "kssl_ctx service_host undefined.\n");
905 if ((krb5rc = krb5_init_context(&krb5context)) != 0)
907 BIO_snprintf(kssl_err->text,KSSL_ERR_MAX,
908 "krb5_init_context() fails: %d\n", krb5rc);
909 kssl_err->reason = SSL_R_KRB5_C_INIT;
913 if ((krb5rc = krb5_sname_to_principal(krb5context,
914 kssl_ctx->service_host,
915 (kssl_ctx->service_name)? kssl_ctx->service_name: KRB5SVC,
916 KRB5_NT_SRV_HST, &krb5creds.server)) != 0)
918 BIO_snprintf(kssl_err->text,KSSL_ERR_MAX,
919 "krb5_sname_to_principal() fails for %s/%s\n",
920 kssl_ctx->service_host,
921 (kssl_ctx->service_name)? kssl_ctx->service_name:
923 kssl_err->reason = SSL_R_KRB5_C_INIT;
927 if ((krb5rc = krb5_cc_default(krb5context, &krb5ccdef)) != 0)
929 kssl_err_set(kssl_err, SSL_R_KRB5_C_CC_PRINC,
930 "krb5_cc_default fails.\n");
934 if ((krb5rc = krb5_cc_get_principal(krb5context, krb5ccdef,
935 &krb5creds.client)) != 0)
937 kssl_err_set(kssl_err, SSL_R_KRB5_C_CC_PRINC,
938 "krb5_cc_get_principal() fails.\n");
942 if ((krb5rc = krb5_get_credentials(krb5context, 0, krb5ccdef,
943 &krb5creds, &krb5credsp)) != 0)
945 kssl_err_set(kssl_err, SSL_R_KRB5_C_GET_CRED,
946 "krb5_get_credentials() fails.\n");
950 *enc_ticketp = &krb5credsp->ticket;
952 kssl_ctx->enctype = krb5credsp->session.keytype;
954 kssl_ctx->enctype = krb5credsp->keyblock.enctype;
957 krb5rc = KRB5KRB_ERR_GENERIC;
958 /* caller should free data of krb5_app_req */
959 /* 20010406 VRS deleted for real KerberosWrapper
960 ** 20010605 VRS reinstated to offer Authenticator to KerberosWrapper
962 krb5_app_req.length = 0;
965 krb5_data krb5in_data;
968 KRB5_APREQBODY *ap_req;
971 krb5in_data.data = NULL;
972 krb5in_data.length = 0;
973 if ((krb5rc = krb5_mk_req_extended(krb5context,
974 &krb5auth_context, 0, &krb5in_data, krb5credsp,
975 &krb5_app_req)) != 0)
977 kssl_err_set(kssl_err, SSL_R_KRB5_C_MK_REQ,
978 "krb5_mk_req_extended() fails.\n");
982 arlen = krb5_app_req.length;
983 p = krb5_app_req.data;
984 ap_req = (KRB5_APREQBODY *) d2i_KRB5_APREQ(NULL, &p, arlen);
987 authenp->length = i2d_KRB5_ENCDATA(
988 ap_req->authenticator, NULL);
989 if (authenp->length &&
990 (authenp->data = malloc(authenp->length)))
992 unsigned char *p = authenp->data;
993 authenp->length = i2d_KRB5_ENCDATA(
994 ap_req->authenticator, &p);
998 if (ap_req) KRB5_APREQ_free((KRB5_APREQ *) ap_req);
999 if (krb5_app_req.length) krb5_xfree(krb5_app_req.data);
1002 if (kssl_ctx_setkey(kssl_ctx, &krb5credsp->session))
1004 kssl_err_set(kssl_err, SSL_R_KRB5_C_INIT,
1005 "kssl_ctx_setkey() fails.\n");
1008 if (kssl_ctx_setkey(kssl_ctx, &krb5credsp->keyblock))
1010 kssl_err_set(kssl_err, SSL_R_KRB5_C_INIT,
1011 "kssl_ctx_setkey() fails.\n");
1018 kssl_ctx_show(kssl_ctx);
1019 #endif /* KSSL_DEBUG */
1021 if (krb5creds.client) krb5_free_principal(krb5context,
1023 if (krb5creds.server) krb5_free_principal(krb5context,
1025 if (krb5auth_context) krb5_auth_con_free(krb5context,
1027 if (krb5context) krb5_free_context(krb5context);
1032 /* Given d2i_-decoded asn1ticket, allocate and return a new krb5_ticket.
1033 ** Return Kerberos error code and kssl_err struct on error.
1034 ** Allocates krb5_ticket and krb5_principal; caller should free these.
1036 ** 20010410 VRS Implemented krb5_decode_ticket() as
1037 ** old_krb5_decode_ticket(). Missing from MIT1.0.6.
1038 ** 20010615 VRS Re-cast as openssl/asn1 d2i_*() functions.
1039 ** Re-used some of the old krb5_decode_ticket()
1040 ** code here. This tkt should alloc/free just
1041 ** like the real thing.
1044 kssl_TKT2tkt( /* IN */ krb5_context krb5context,
1045 /* IN */ KRB5_TKTBODY *asn1ticket,
1046 /* OUT */ krb5_ticket **krb5ticket,
1047 /* OUT */ KSSL_ERR *kssl_err )
1049 krb5_error_code krb5rc = KRB5KRB_ERR_GENERIC;
1050 krb5_ticket *new5ticket = NULL;
1051 ASN1_GENERALSTRING *gstr_svc, *gstr_host;
1055 if (asn1ticket == NULL || asn1ticket->realm == NULL ||
1056 asn1ticket->sname == NULL ||
1057 asn1ticket->sname->namestring == NULL ||
1058 asn1ticket->sname->namestring->num < 2)
1060 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1061 "Null field in asn1ticket.\n");
1062 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1063 return KRB5KRB_ERR_GENERIC;
1066 if ((new5ticket = (krb5_ticket *) calloc(1, sizeof(krb5_ticket)))==NULL)
1068 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1069 "Unable to allocate new krb5_ticket.\n");
1070 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1071 return ENOMEM; /* or KRB5KRB_ERR_GENERIC; */
1074 gstr_svc = (ASN1_GENERALSTRING*)asn1ticket->sname->namestring->data[0];
1075 gstr_host = (ASN1_GENERALSTRING*)asn1ticket->sname->namestring->data[1];
1077 if ((krb5rc = kssl_build_principal_2(krb5context,
1078 &new5ticket->server,
1079 asn1ticket->realm->length, asn1ticket->realm->data,
1080 gstr_svc->length, gstr_svc->data,
1081 gstr_host->length, gstr_host->data)) != 0)
1084 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1085 "Error building ticket server principal.\n");
1086 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1087 return krb5rc; /* or KRB5KRB_ERR_GENERIC; */
1090 krb5_princ_type(krb5context, new5ticket->server) =
1091 asn1ticket->sname->nametype->data[0];
1092 new5ticket->enc_part.enctype = asn1ticket->encdata->etype->data[0];
1093 new5ticket->enc_part.kvno = asn1ticket->encdata->kvno->data[0];
1094 new5ticket->enc_part.ciphertext.length =
1095 asn1ticket->encdata->cipher->length;
1096 if ((new5ticket->enc_part.ciphertext.data =
1097 calloc(1, asn1ticket->encdata->cipher->length)) == NULL)
1100 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1101 "Error allocating cipher in krb5ticket.\n");
1102 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1103 return KRB5KRB_ERR_GENERIC;
1107 memcpy(new5ticket->enc_part.ciphertext.data,
1108 asn1ticket->encdata->cipher->data,
1109 asn1ticket->encdata->cipher->length);
1112 *krb5ticket = new5ticket;
1117 /* Given krb5 service name in KSSL_CTX *kssl_ctx (typically "kssl"),
1118 ** and krb5 AP_REQ message & message length,
1119 ** Return Kerberos session key and client principle
1120 ** to SSL Server in KSSL_CTX *kssl_ctx.
1122 ** 19990702 VRS Started.
1125 kssl_sget_tkt( /* UPDATE */ KSSL_CTX *kssl_ctx,
1126 /* IN */ krb5_data *indata,
1127 /* OUT */ krb5_ticket_times *ttimes,
1128 /* OUT */ KSSL_ERR *kssl_err )
1130 krb5_error_code krb5rc = KRB5KRB_ERR_GENERIC;
1131 static krb5_context krb5context = NULL;
1132 static krb5_auth_context krb5auth_context = NULL;
1133 krb5_ticket *krb5ticket = NULL;
1134 KRB5_TKTBODY *asn1ticket = NULL;
1136 krb5_keytab krb5keytab = NULL;
1137 krb5_keytab_entry kt_entry;
1138 krb5_principal krb5server;
1140 kssl_err_set(kssl_err, 0, "");
1144 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1145 "No kssl_ctx defined.\n");
1150 printf("in kssl_sget_tkt(%s)\n", kstring(kssl_ctx->service_name));
1151 #endif /* KSSL_DEBUG */
1153 if (!krb5context && (krb5rc = krb5_init_context(&krb5context)))
1155 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1156 "krb5_init_context() fails.\n");
1159 if (krb5auth_context &&
1160 (krb5rc = krb5_auth_con_free(krb5context, krb5auth_context)))
1162 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1163 "krb5_auth_con_free() fails.\n");
1166 else krb5auth_context = NULL;
1167 if (!krb5auth_context &&
1168 (krb5rc = krb5_auth_con_init(krb5context, &krb5auth_context)))
1170 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1171 "krb5_auth_con_init() fails.\n");
1175 if ((krb5rc = krb5_sname_to_principal(krb5context, NULL,
1176 (kssl_ctx->service_name)? kssl_ctx->service_name: KRB5SVC,
1177 KRB5_NT_SRV_HST, &krb5server)) != 0)
1179 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1180 "krb5_sname_to_principal() fails.\n");
1184 /* kssl_ctx->keytab_file == NULL ==> use Kerberos default
1186 if (kssl_ctx->keytab_file)
1188 krb5rc = krb5_kt_resolve(krb5context, kssl_ctx->keytab_file,
1192 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1193 "krb5_kt_resolve() fails.\n");
1199 krb5rc = krb5_kt_default(krb5context,&krb5keytab);
1202 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1203 "krb5_kt_default() fails.\n");
1208 /* Actual Kerberos5 krb5_recvauth() has initial conversation here
1209 ** o check KRB5_SENDAUTH_BADAUTHVERS
1210 ** unless KRB5_RECVAUTH_SKIP_VERSION
1211 ** o check KRB5_SENDAUTH_BADAPPLVERS
1212 ** o send "0" msg if all OK
1215 /* 20010411 was using AP_REQ instead of true KerberosWrapper
1217 ** if ((krb5rc = krb5_rd_req(krb5context, &krb5auth_context,
1218 ** &krb5in_data, krb5server, krb5keytab,
1219 ** &ap_option, &krb5ticket)) != 0) { Error }
1223 if ((asn1ticket = (KRB5_TKTBODY *) d2i_KRB5_TICKET(NULL, &p,
1224 (long) indata->length)) == NULL)
1226 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1227 "d2i_KRB5_TICKET() ASN.1 decode failure.\n");
1228 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1232 /* Was: krb5rc = krb5_decode_ticket(krb5in_data,&krb5ticket)) != 0) */
1233 if ((krb5rc = kssl_TKT2tkt(krb5context, asn1ticket, &krb5ticket,
1236 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1237 "Error converting ASN.1 ticket to krb5_ticket.\n");
1238 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1242 if (! krb5_principal_compare(krb5context, krb5server,
1243 krb5ticket->server)) {
1244 krb5rc = KRB5_PRINC_NOMATCH;
1245 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1246 "server principal != ticket principal\n");
1247 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1250 if ((krb5rc = krb5_kt_get_entry(krb5context, krb5keytab,
1251 krb5ticket->server, krb5ticket->enc_part.kvno,
1252 krb5ticket->enc_part.enctype, &kt_entry)) != 0) {
1253 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1254 "krb5_kt_get_entry() fails with %x.\n", krb5rc);
1255 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1258 if ((krb5rc = krb5_decrypt_tkt_part(krb5context, &kt_entry.key,
1259 krb5ticket)) != 0) {
1260 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1261 "krb5_decrypt_tkt_part() failed.\n");
1262 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1266 krb5_kt_free_entry(krb5context, &kt_entry);
1269 int i; krb5_address **paddr = krb5ticket->enc_part2->caddrs;
1270 printf("Decrypted ticket fields:\n");
1271 printf("\tflags: %X, transit-type: %X",
1272 krb5ticket->enc_part2->flags,
1273 krb5ticket->enc_part2->transited.tr_type);
1274 print_krb5_data("\ttransit-data: ",
1275 &(krb5ticket->enc_part2->transited.tr_contents));
1276 printf("\tcaddrs: %p, authdata: %p\n",
1277 krb5ticket->enc_part2->caddrs,
1278 krb5ticket->enc_part2->authorization_data);
1279 printf("\tcaddrs:\n");
1280 for (i=0; paddr[i] != NULL; i++)
1282 d.length=paddr[i]->length; d.data=paddr[i]->contents;
1283 print_krb5_data("\t\tIP: ", &d);
1285 printf("\tstart/auth/end times: %d / %d / %d\n",
1286 krb5ticket->enc_part2->times.starttime,
1287 krb5ticket->enc_part2->times.authtime,
1288 krb5ticket->enc_part2->times.endtime);
1290 #endif /* KSSL_DEBUG */
1293 krb5rc = KRB5_NO_TKT_SUPPLIED;
1294 if (!krb5ticket || !krb5ticket->enc_part2 ||
1295 !krb5ticket->enc_part2->client ||
1296 !krb5ticket->enc_part2->client->data ||
1297 !krb5ticket->enc_part2->session)
1299 kssl_err_set(kssl_err, SSL_R_KRB5_S_BAD_TICKET,
1300 "bad ticket from krb5_rd_req.\n");
1302 else if (kssl_ctx_setprinc(kssl_ctx, KSSL_CLIENT,
1303 &krb5ticket->enc_part2->client->realm,
1304 krb5ticket->enc_part2->client->data))
1306 kssl_err_set(kssl_err, SSL_R_KRB5_S_BAD_TICKET,
1307 "kssl_ctx_setprinc() fails.\n");
1309 else if (kssl_ctx_setkey(kssl_ctx, krb5ticket->enc_part2->session))
1311 kssl_err_set(kssl_err, SSL_R_KRB5_S_BAD_TICKET,
1312 "kssl_ctx_setkey() fails.\n");
1314 else if (krb5ticket->enc_part2->flags & TKT_FLG_INVALID)
1316 krb5rc = KRB5KRB_AP_ERR_TKT_INVALID;
1317 kssl_err_set(kssl_err, SSL_R_KRB5_S_BAD_TICKET,
1318 "invalid ticket from krb5_rd_req.\n");
1322 kssl_ctx->enctype = krb5ticket->enc_part.enctype;
1323 ttimes->authtime = krb5ticket->enc_part2->times.authtime;
1324 ttimes->starttime = krb5ticket->enc_part2->times.starttime;
1325 ttimes->endtime = krb5ticket->enc_part2->times.endtime;
1326 ttimes->renew_till = krb5ticket->enc_part2->times.renew_till;
1330 kssl_ctx_show(kssl_ctx);
1331 #endif /* KSSL_DEBUG */
1333 if (asn1ticket) KRB5_TICKET_free((KRB5_TICKET *) asn1ticket);
1334 if (krb5keytab) krb5_kt_close(krb5context, krb5keytab);
1335 if (krb5ticket) krb5_free_ticket(krb5context, krb5ticket);
1336 if (krb5server) krb5_free_principal(krb5context, krb5server);
1341 /* Allocate & return a new kssl_ctx struct.
1346 return ((KSSL_CTX *) calloc(1, sizeof(KSSL_CTX)));
1350 /* Frees a kssl_ctx struct and any allocated memory it holds.
1354 kssl_ctx_free(KSSL_CTX *kssl_ctx)
1356 if (kssl_ctx == NULL) return kssl_ctx;
1358 if (kssl_ctx->key) memset(kssl_ctx->key, 0,
1360 if (kssl_ctx->key) free(kssl_ctx->key);
1361 if (kssl_ctx->client_princ) free(kssl_ctx->client_princ);
1362 if (kssl_ctx->service_host) free(kssl_ctx->service_host);
1363 if (kssl_ctx->service_name) free(kssl_ctx->service_name);
1364 if (kssl_ctx->keytab_file) free(kssl_ctx->keytab_file);
1367 return (KSSL_CTX *) NULL;
1371 /* Given a (krb5_data *) entity (and optional realm),
1372 ** set the plain (char *) client_princ or service_host member
1373 ** of the kssl_ctx struct.
1376 kssl_ctx_setprinc(KSSL_CTX *kssl_ctx, int which,
1377 krb5_data *realm, krb5_data *entity)
1382 if (kssl_ctx == NULL || entity == NULL) return KSSL_CTX_ERR;
1386 case KSSL_CLIENT: princ = &kssl_ctx->client_princ; break;
1387 case KSSL_SERVER: princ = &kssl_ctx->service_host; break;
1388 default: return KSSL_CTX_ERR; break;
1390 if (*princ) free(*princ);
1392 length = entity->length + ((realm)? realm->length + 2: 1);
1393 if ((*princ = calloc(1, length)) == NULL)
1394 return KSSL_CTX_ERR;
1397 strncpy(*princ, entity->data, entity->length);
1400 strcat (*princ, "@");
1401 (void) strncat(*princ, realm->data, realm->length);
1409 /* Set one of the plain (char *) string members of the kssl_ctx struct.
1410 ** Default values should be:
1411 ** which == KSSL_SERVICE => "khost" (KRB5SVC)
1412 ** which == KSSL_KEYTAB => "/etc/krb5.keytab" (KRB5KEYTAB)
1415 kssl_ctx_setstring(KSSL_CTX *kssl_ctx, int which, char *text)
1419 if (!kssl_ctx) return KSSL_CTX_ERR;
1423 case KSSL_SERVICE: string = &kssl_ctx->service_name; break;
1424 case KSSL_SERVER: string = &kssl_ctx->service_host; break;
1425 case KSSL_CLIENT: string = &kssl_ctx->client_princ; break;
1426 case KSSL_KEYTAB: string = &kssl_ctx->keytab_file; break;
1427 default: return KSSL_CTX_ERR; break;
1429 if (*string) free(*string);
1437 if ((*string = calloc(1, strlen(text) + 1)) == NULL)
1438 return KSSL_CTX_ERR;
1440 strcpy(*string, text);
1446 /* Copy the Kerberos session key from a (krb5_keyblock *) to a kssl_ctx
1447 ** struct. Clear kssl_ctx->key if Kerberos session key is NULL.
1450 kssl_ctx_setkey(KSSL_CTX *kssl_ctx, krb5_keyblock *session)
1453 krb5_enctype enctype;
1454 krb5_octet FAR *contents = NULL;
1456 if (!kssl_ctx) return KSSL_CTX_ERR;
1460 memset(kssl_ctx->key, 0, kssl_ctx->length);
1461 free(kssl_ctx->key);
1468 length = session->keyvalue->length;
1469 enctype = session->keytype;
1470 contents = session->keyvalue->contents;
1472 length = session->length;
1473 enctype = session->enctype;
1474 contents = session->contents;
1476 kssl_ctx->enctype = enctype;
1477 kssl_ctx->length = length;
1481 kssl_ctx->enctype = ENCTYPE_UNKNOWN;
1482 kssl_ctx->length = 0;
1486 if ((kssl_ctx->key =
1487 (krb5_octet FAR *) calloc(1, kssl_ctx->length)) == NULL)
1489 kssl_ctx->length = 0;
1490 return KSSL_CTX_ERR;
1493 memcpy(kssl_ctx->key, contents, length);
1499 /* Display contents of kssl_ctx struct
1502 kssl_ctx_show(KSSL_CTX *kssl_ctx)
1506 printf("kssl_ctx: ");
1507 if (kssl_ctx == NULL)
1513 printf("%p\n", kssl_ctx);
1515 printf("\tservice:\t%s\n",
1516 (kssl_ctx->service_name)? kssl_ctx->service_name: "NULL");
1517 printf("\tclient:\t%s\n",
1518 (kssl_ctx->client_princ)? kssl_ctx->client_princ: "NULL");
1519 printf("\tserver:\t%s\n",
1520 (kssl_ctx->service_host)? kssl_ctx->service_host: "NULL");
1521 printf("\tkeytab:\t%s\n",
1522 (kssl_ctx->keytab_file)? kssl_ctx->keytab_file: "NULL");
1523 printf("\tkey [%d:%d]:\t",
1524 kssl_ctx->enctype, kssl_ctx->length);
1526 for (i=0; i < kssl_ctx->length && kssl_ctx->key; i++)
1528 printf("%02x", kssl_ctx->key[i]);
1534 void kssl_krb5_free_data_contents(krb5_context context, krb5_data *data)
1538 free(data->if (data->data) data);
1539 #elif defined(KRB5_MIT_OLD11)
1541 krb5_xfree(data->data);
1545 krb5_free_data_contents(NULL, data);
1550 /* Helper function for kssl_validate_times().
1551 ** We need context->clockskew, but krb5_context is an opaque struct.
1552 ** So we try to sneek the clockskew out through the replay cache.
1553 ** If that fails just return a likely default (300 seconds).
1555 krb5_deltat get_rc_clockskew(krb5_context context)
1558 krb5_deltat clockskew;
1560 if (krb5_rc_default(context, &rc)) return KSSL_CLOCKSKEW;
1561 if (krb5_rc_initialize(context, rc, 0)) return KSSL_CLOCKSKEW;
1562 if (krb5_rc_get_lifespan(context, rc, &clockskew)) {
1563 clockskew = KSSL_CLOCKSKEW;
1565 (void) krb5_rc_destroy(context, rc);
1570 /* kssl_validate_times() combines (and more importantly exposes)
1571 ** the MIT KRB5 internal function krb5_validate_times() and the
1572 ** in_clock_skew() macro. The authenticator client time is checked
1573 ** to be within clockskew secs of the current time and the current
1574 ** time is checked to be within the ticket start and expire times.
1575 ** Either check may be omitted by supplying a NULL value.
1576 ** Returns 0 for valid times, SSL_R_KRB5* error codes otherwise.
1577 ** See Also: (Kerberos source)/krb5/lib/krb5/krb/valid_times.c
1580 krb5_error_code kssl_validate_times( krb5_timestamp atime,
1581 krb5_ticket_times *ttimes)
1584 krb5_timestamp start, now;
1586 krb5_context context;
1588 if ((rc = krb5_init_context(&context))) return SSL_R_KRB5_S_BAD_TICKET;
1589 skew = get_rc_clockskew(context);
1590 if ((rc = krb5_timeofday(context,&now))) return SSL_R_KRB5_S_BAD_TICKET;
1591 krb5_free_context(context);
1593 if (atime && labs(atime - now) >= skew) return SSL_R_KRB5_S_TKT_SKEW;
1595 if (! ttimes) return 0;
1597 start = (ttimes->starttime != 0)? ttimes->starttime: ttimes->authtime;
1598 if (start - now > skew) return SSL_R_KRB5_S_TKT_NYV;
1599 if ((now - ttimes->endtime) > skew) return SSL_R_KRB5_S_TKT_EXPIRED;
1602 printf("kssl_validate_times: %d |<- | %d - %d | < %d ->| %d\n",
1603 start, atime, now, skew, ttimes->endtime);
1604 #endif /* KSSL_DEBUG */
1610 /* Decode and decrypt given DER-encoded authenticator, then pass
1611 ** authenticator ctime back in *atimep (or 0 if time unavailable).
1612 ** Returns krb5_error_code and kssl_err on error. A NULL
1613 ** authenticator (authentp->length == 0) is not considered an error.
1614 ** Note that kssl_check_authent() makes use of the KRB5 session key;
1615 ** you must call kssl_sget_tkt() to get the key before calling this routine.
1617 krb5_error_code kssl_check_authent(
1618 /* IN */ KSSL_CTX *kssl_ctx,
1619 /* IN */ krb5_data *authentp,
1620 /* OUT */ krb5_timestamp *atimep,
1621 /* OUT */ KSSL_ERR *kssl_err )
1623 krb5_error_code krb5rc = 0;
1624 KRB5_ENCDATA *dec_authent = NULL;
1625 KRB5_AUTHENTBODY *auth = NULL;
1626 krb5_enctype enctype;
1627 EVP_CIPHER_CTX ciph_ctx;
1628 EVP_CIPHER *enc = NULL;
1629 unsigned char iv[EVP_MAX_IV_LENGTH];
1630 unsigned char *p, *unenc_authent, *tbuf = NULL;
1631 int padl, outl, unencbufsize;
1632 struct tm tm_time, *tm_l, *tm_g;
1633 time_t now, tl, tg, tz_offset;
1636 kssl_err_set(kssl_err, 0, "");
1638 #ifndef KRB5CHECKAUTH
1641 #if KRB5CHECKAUTH == 0
1644 #endif /* KRB5CHECKAUTH */
1646 if (authentp == NULL || authentp->length == 0) return 0;
1649 printf("kssl_check_authent: authenticator[%d]:\n",authentp->length);
1651 for (padl=0; padl < authentp->length; padl++) printf("%02x ",p[padl]);
1653 #endif /* KSSL_DEBUG */
1655 unencbufsize = 2 * authentp->length;
1656 if ((unenc_authent = calloc(1, unencbufsize)) == NULL)
1658 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1659 "Unable to allocate authenticator buffer.\n");
1660 krb5rc = KRB5KRB_ERR_GENERIC;
1665 if ((dec_authent = d2i_KRB5_ENCDATA(NULL, &p,
1666 (long) authentp->length)) == NULL)
1668 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1669 "Error decoding authenticator.\n");
1670 krb5rc = KRB5KRB_AP_ERR_BAD_INTEGRITY;
1674 enctype = dec_authent->etype->data[0]; /* should = kssl_ctx->enctype */
1675 enc = kssl_map_enc(enctype);
1676 memset(iv, 0, EVP_MAX_IV_LENGTH); /* per RFC 1510 */
1678 EVP_DecryptInit(&ciph_ctx, enc, kssl_ctx->key, iv);
1679 EVP_DecryptUpdate(&ciph_ctx, unenc_authent, &outl,
1680 dec_authent->cipher->data, dec_authent->cipher->length);
1681 if (outl > unencbufsize)
1683 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1684 "Buffer overflow decrypting authenticator.\n");
1685 krb5rc = KRB5KRB_AP_ERR_BAD_INTEGRITY;
1688 EVP_DecryptFinal(&ciph_ctx, &(unenc_authent[outl]), &padl);
1690 if (outl > unencbufsize)
1692 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1693 "Buffer overflow decrypting authenticator.\n");
1694 krb5rc = KRB5KRB_AP_ERR_BAD_INTEGRITY;
1697 EVP_CIPHER_CTX_cleanup(&ciph_ctx);
1700 printf("kssl_check_authent: decrypted authenticator[%d] =\n", outl);
1701 for (padl=0; padl < outl; padl++) printf("%02x ",unenc_authent[padl]);
1703 #endif /* KSSL_DEBUG */
1705 if ((p = kssl_skip_confound(enctype, unenc_authent)) == NULL)
1707 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1708 "confounded by authenticator.\n");
1709 krb5rc = KRB5KRB_AP_ERR_BAD_INTEGRITY;
1712 outl -= p - unenc_authent;
1714 if ((auth = (KRB5_AUTHENTBODY *) d2i_KRB5_AUTHENT(NULL, &p,
1715 (long) outl))==NULL)
1717 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1718 "Error decoding authenticator body.\n");
1719 krb5rc = KRB5KRB_AP_ERR_BAD_INTEGRITY;
1722 if ((tbuf = calloc(1, auth->ctime->length + 1)) == NULL)
1724 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1725 "Unable to allocate atime buffer.\n");
1726 krb5rc = KRB5KRB_ERR_GENERIC;
1729 else strncpy(tbuf, auth->ctime->data, auth->ctime->length);
1731 if (strptime(tbuf, "%Y%m%d%H%M%S", &tm_time) != NULL)
1734 tm_l = localtime(&now); tl = mktime(tm_l);
1735 tm_g = gmtime(&now); tg = mktime(tm_g);
1736 tz_offset = tg - tl;
1738 *atimep = mktime(&tm_time) - tz_offset;
1742 printf("kssl_check_authent: client time %s = %d\n", tbuf, *atimep);
1743 #endif /* KSSL_DEBUG */
1746 if (tbuf) free(tbuf);
1747 if (auth) KRB5_AUTHENT_free((KRB5_AUTHENT *) auth);
1748 if (dec_authent) KRB5_ENCDATA_free(dec_authent);
1749 if (unenc_authent) free(unenc_authent);
1754 /* Replaces krb5_build_principal_ext(), with varargs length == 2 (svc, host),
1755 ** because I dont't know how to stub varargs.
1756 ** Returns krb5_error_code == ENOMEM on alloc error, otherwise
1757 ** passes back newly constructed principal, which should be freed by caller.
1759 krb5_error_code kssl_build_principal_2(
1760 /* UPDATE */ krb5_context context,
1761 /* OUT */ krb5_principal *princ,
1762 /* IN */ int rlen, const char *realm,
1763 /* IN */ int slen, const char *svc,
1764 /* IN */ int hlen, const char *host)
1766 krb5_data *p_data = NULL;
1767 krb5_principal new_p = NULL;
1770 if ((p_data = (krb5_data *) calloc(2, sizeof(krb5_data))) == NULL ||
1771 (new_p = (krb5_principal) calloc(1, sizeof(krb5_principal_data)))
1774 new_p->data = p_data;
1776 if ((new_r = calloc(1, rlen + 1)) == NULL) goto err;
1777 memcpy(new_r, realm, rlen);
1778 krb5_princ_set_realm_length(context, new_p, rlen);
1779 krb5_princ_set_realm_data(context, new_p, new_r);
1781 if ((new_p->data[0].data = calloc(1, slen + 1)) == NULL) goto err;
1782 memcpy(new_p->data[0].data, svc, slen);
1783 new_p->data[0].length = slen;
1785 if ((new_p->data[1].data = calloc(1, hlen + 1)) == NULL) goto err;
1786 memcpy(new_p->data[1].data, host, hlen);
1787 new_p->data[1].length = hlen;
1789 krb5_princ_type(context, new_p) = KRB5_NT_UNKNOWN;
1794 if (new_p && new_p[0].data) free(new_p[0].data);
1795 if (new_p && new_p[1].data) free(new_p[1].data);
1796 if (new_p) free(new_p);
1797 if (new_r) free(new_r);
1802 #else /* !OPENSSL_NO_KRB5 */
1804 #if defined(PEDANTIC) || defined(OPENSSL_SYS_VMS)
1805 static int dummy=(int)&dummy;
1808 #endif /* !OPENSSL_NO_KRB5 */