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