ssl/kssl.c

   1 /* ssl/kssl.c -*- mode: C; c-file-style: "eay" -*- */
   2 /* Written by Vern Staats <staatsvr@asc.hpc.mil> for the OpenSSL project 2000.
   3  */
   4 /* ====================================================================
   5  * Copyright (c) 2000 The OpenSSL Project.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  *
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  *
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in
  16  *    the documentation and/or other materials provided with the
  17  *    distribution.
  18  *
  19  * 3. All advertising materials mentioning features or use of this
  20  *    software must display the following acknowledgment:
  21  *    "This product includes software developed by the OpenSSL Project
  22  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  23  *
  24  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  25  *    endorse or promote products derived from this software without
  26  *    prior written permission. For written permission, please contact
  27  *    licensing@OpenSSL.org.
  28  *
  29  * 5. Products derived from this software may not be called "OpenSSL"
  30  *    nor may "OpenSSL" appear in their names without prior written
  31  *    permission of the OpenSSL Project.
  32  *
  33  * 6. Redistributions of any form whatsoever must retain the following
  34  *    acknowledgment:
  35  *    "This product includes software developed by the OpenSSL Project
  36  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  37  *
  38  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  39  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  40  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  41  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  42  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  43  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  44  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  45  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  46  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  47  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  48  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  49  * OF THE POSSIBILITY OF SUCH DAMAGE.
  50  * ====================================================================
  51  *
  52  * This product includes cryptographic software written by Eric Young
  53  * (eay@cryptsoft.com).  This product includes software written by Tim
  54  * Hudson (tjh@cryptsoft.com).
  55  *
  56  */
  57
  58
  59 /*  ssl/kssl.c  --  Routines to support (& debug) Kerberos5 auth for openssl
  60 **
  61 **  19990701    VRS     Started.
  62 **  200011??    Jeffrey Altman, Richard Levitte
  63 **                      Generalized for Heimdal, Newer MIT, & Win32.
  64 **                      Integrated into main OpenSSL 0.9.7 snapshots.
  65 **  20010413    Simon Wilkinson, VRS
  66 **                      Real RFC2712 KerberosWrapper replaces AP_REQ.
  67 */
  68
  69 #include <openssl/opensslconf.h>
  70
  71 #define _XOPEN_SOURCE /* glibc2 needs this to declare strptime() */
  72 #include <time.h>
  73 #include <string.h>
  74
  75 #include <openssl/ssl.h>
  76 #include <openssl/evp.h>
  77 #include <openssl/objects.h>
  78 #include <openssl/krb5_asn.h>
  79
  80 #ifndef OPENSSL_NO_KRB5
  81
  82 /*
  83  * When OpenSSL is built on Windows, we do not want to require that
  84  * the Kerberos DLLs be available in order for the OpenSSL DLLs to
  85  * work.  Therefore, all Kerberos routines are loaded at run time
  86  * and we do not link to a .LIB file.
  87  */
  88
  89 #if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_WIN32)
  90 /*
  91  * The purpose of the following pre-processor statements is to provide
  92  * compatibility with different releases of MIT Kerberos for Windows.
  93  * All versions up to 1.2 used macros.  But macros do not allow for
  94  * a binary compatible interface for DLLs.  Therefore, all macros are
  95  * being replaced by function calls.  The following code will allow
  96  * an OpenSSL DLL built on Windows to work whether or not the macro
  97  * or function form of the routines are utilized.
  98  */
  99 #ifdef  krb5_cc_get_principal
 100 #define NO_DEF_KRB5_CCACHE
 101 #undef  krb5_cc_get_principal
 102 #endif
 103 #define krb5_cc_get_principal    kssl_krb5_cc_get_principal
 104
 105 #define krb5_free_data_contents  kssl_krb5_free_data_contents
 106 #define krb5_free_context        kssl_krb5_free_context
 107 #define krb5_auth_con_free       kssl_krb5_auth_con_free
 108 #define krb5_free_principal      kssl_krb5_free_principal
 109 #define krb5_mk_req_extended     kssl_krb5_mk_req_extended
 110 #define krb5_get_credentials     kssl_krb5_get_credentials
 111 #define krb5_cc_default          kssl_krb5_cc_default
 112 #define krb5_sname_to_principal  kssl_krb5_sname_to_principal
 113 #define krb5_init_context        kssl_krb5_init_context
 114 #define krb5_free_ticket         kssl_krb5_free_ticket
 115 #define krb5_rd_req              kssl_krb5_rd_req
 116 #define krb5_kt_default          kssl_krb5_kt_default
 117 #define krb5_kt_resolve          kssl_krb5_kt_resolve
 118 /* macros in mit 1.2.2 and earlier; functions in mit 1.2.3 and greater */
 119 #ifndef krb5_kt_close
 120 #define krb5_kt_close            kssl_krb5_kt_close
 121 #endif /* krb5_kt_close */
 122 #ifndef krb5_kt_get_entry
 123 #define krb5_kt_get_entry        kssl_krb5_kt_get_entry
 124 #endif /* krb5_kt_get_entry */
 125 #define krb5_auth_con_init       kssl_krb5_auth_con_init
 126
 127 #define krb5_principal_compare   kssl_krb5_principal_compare
 128 #define krb5_decrypt_tkt_part    kssl_krb5_decrypt_tkt_part
 129 #define krb5_timeofday           kssl_krb5_timeofday
 130 #define krb5_rc_default           kssl_krb5_rc_default
 131 #define krb5_rc_initialize   kssl_krb5_rc_initialize
 132 #define krb5_rc_get_lifespan kssl_krb5_rc_get_lifespan
 133 #define krb5_rc_destroy      kssl_krb5_rc_destroy
 134 #define valid_cksumtype      kssl_valid_cksumtype
 135 #define krb5_checksum_size   kssl_krb5_checksum_size
 136 #define krb5_kt_free_entry   kssl_krb5_kt_free_entry
 137 #define krb5_auth_con_setrcache  kssl_krb5_auth_con_setrcache
 138 #define krb5_auth_con_getrcache  kssl_krb5_auth_con_getrcache
 139 #define krb5_get_server_rcache   kssl_krb5_get_server_rcache
 140
 141 /* Prototypes for built in stubs */
 142 void kssl_krb5_free_data_contents(krb5_context, krb5_data *);
 143 void kssl_krb5_free_principal(krb5_context, krb5_principal );
 144 krb5_error_code kssl_krb5_kt_resolve(krb5_context,
 145                                      krb5_const char *,
 146                                      krb5_keytab *);
 147 krb5_error_code kssl_krb5_kt_default(krb5_context,
 148                                      krb5_keytab *);
 149 krb5_error_code kssl_krb5_free_ticket(krb5_context, krb5_ticket *);
 150 krb5_error_code kssl_krb5_rd_req(krb5_context, krb5_auth_context *,
 151                                  krb5_const krb5_data *,
 152                                  krb5_const_principal, krb5_keytab,
 153                                  krb5_flags *,krb5_ticket **);
 154
 155 krb5_boolean kssl_krb5_principal_compare(krb5_context, krb5_const_principal,
 156                                          krb5_const_principal);
 157 krb5_error_code kssl_krb5_mk_req_extended(krb5_context,
 158                                           krb5_auth_context  *,
 159                                           krb5_const krb5_flags,
 160                                           krb5_data  *,
 161                                           krb5_creds  *,
 162                                           krb5_data  * );
 163 krb5_error_code kssl_krb5_init_context(krb5_context *);
 164 void kssl_krb5_free_context(krb5_context);
 165 krb5_error_code kssl_krb5_cc_default(krb5_context,krb5_ccache  *);
 166 krb5_error_code kssl_krb5_sname_to_principal(krb5_context,
 167                                              krb5_const char  *,
 168                                              krb5_const char  *,
 169                                              krb5_int32,
 170                                              krb5_principal  *);
 171 krb5_error_code kssl_krb5_get_credentials(krb5_context,
 172                                           krb5_const krb5_flags,
 173                                           krb5_ccache,
 174                                           krb5_creds  *,
 175                                           krb5_creds  *  *);
 176 krb5_error_code kssl_krb5_auth_con_init(krb5_context,
 177                                         krb5_auth_context  *);
 178 krb5_error_code kssl_krb5_cc_get_principal(krb5_context context,
 179                                            krb5_ccache cache,
 180                                            krb5_principal *principal);
 181 krb5_error_code kssl_krb5_auth_con_free(krb5_context,krb5_auth_context);
 182 size_t kssl_krb5_checksum_size(krb5_context context,krb5_cksumtype ctype);
 183 krb5_boolean kssl_valid_cksumtype(krb5_cksumtype ctype);
 184 krb5_error_code krb5_kt_free_entry(krb5_context,krb5_keytab_entry FAR * );
 185 krb5_error_code kssl_krb5_auth_con_setrcache(krb5_context,
 186                                              krb5_auth_context,
 187                                              krb5_rcache);
 188 krb5_error_code kssl_krb5_get_server_rcache(krb5_context,
 189                                             krb5_const krb5_data *,
 190                                             krb5_rcache *);
 191 krb5_error_code kssl_krb5_auth_con_getrcache(krb5_context,
 192                                              krb5_auth_context,
 193                                              krb5_rcache *);
 194
 195 /* Function pointers (almost all Kerberos functions are _stdcall) */
 196 static void (_stdcall *p_krb5_free_data_contents)(krb5_context, krb5_data *)
 197         =NULL;
 198 static void (_stdcall *p_krb5_free_principal)(krb5_context, krb5_principal )
 199         =NULL;
 200 static krb5_error_code(_stdcall *p_krb5_kt_resolve)
 201                         (krb5_context, krb5_const char *, krb5_keytab *)=NULL;
 202 static krb5_error_code (_stdcall *p_krb5_kt_default)(krb5_context,
 203                                                      krb5_keytab *)=NULL;
 204 static krb5_error_code (_stdcall *p_krb5_free_ticket)(krb5_context,
 205                                                       krb5_ticket *)=NULL;
 206 static krb5_error_code (_stdcall *p_krb5_rd_req)(krb5_context,
 207                                                  krb5_auth_context *,
 208                                                  krb5_const krb5_data *,
 209                                                  krb5_const_principal,
 210                                                  krb5_keytab, krb5_flags *,
 211                                                  krb5_ticket **)=NULL;
 212 static krb5_error_code (_stdcall *p_krb5_mk_req_extended)
 213                         (krb5_context, krb5_auth_context *,
 214                          krb5_const krb5_flags, krb5_data *, krb5_creds *,
 215                          krb5_data * )=NULL;
 216 static krb5_error_code (_stdcall *p_krb5_init_context)(krb5_context *)=NULL;
 217 static void (_stdcall *p_krb5_free_context)(krb5_context)=NULL;
 218 static krb5_error_code (_stdcall *p_krb5_cc_default)(krb5_context,
 219                                                      krb5_ccache  *)=NULL;
 220 static krb5_error_code (_stdcall *p_krb5_sname_to_principal)
 221                         (krb5_context, krb5_const char *, krb5_const char *,
 222                          krb5_int32, krb5_principal *)=NULL;
 223 static krb5_error_code (_stdcall *p_krb5_get_credentials)
 224                         (krb5_context, krb5_const krb5_flags, krb5_ccache,
 225                          krb5_creds *, krb5_creds **)=NULL;
 226 static krb5_error_code (_stdcall *p_krb5_auth_con_init)
 227                         (krb5_context, krb5_auth_context *)=NULL;
 228 static krb5_error_code (_stdcall *p_krb5_cc_get_principal)
 229                         (krb5_context context, krb5_ccache cache,
 230                          krb5_principal *principal)=NULL;
 231 static krb5_error_code (_stdcall *p_krb5_auth_con_free)
 232                         (krb5_context, krb5_auth_context)=NULL;
 233 static krb5_error_code (_stdcall *p_krb5_decrypt_tkt_part)
 234                         (krb5_context, krb5_const krb5_keyblock *,
 235                                            krb5_ticket *)=NULL;
 236 static krb5_error_code (_stdcall *p_krb5_timeofday)
 237                         (krb5_context context, krb5_int32 *timeret)=NULL;
 238 static krb5_error_code (_stdcall *p_krb5_rc_default)
 239                         (krb5_context context, krb5_rcache *rc)=NULL;
 240 static krb5_error_code (_stdcall *p_krb5_rc_initialize)
 241                         (krb5_context context, krb5_rcache rc,
 242                                      krb5_deltat lifespan)=NULL;
 243 static krb5_error_code (_stdcall *p_krb5_rc_get_lifespan)
 244                         (krb5_context context, krb5_rcache rc,
 245                                        krb5_deltat *lifespan)=NULL;
 246 static krb5_error_code (_stdcall *p_krb5_rc_destroy)
 247                         (krb5_context context, krb5_rcache rc)=NULL;
 248 static krb5_boolean (_stdcall *p_krb5_principal_compare)
 249                      (krb5_context, krb5_const_principal, krb5_const_principal)=NULL;
 250 static size_t (_stdcall *p_krb5_checksum_size)(krb5_context context,krb5_cksumtype ctype)=NULL;
 251 static krb5_boolean (_stdcall *p_valid_cksumtype)(krb5_cksumtype ctype)=NULL;
 252 static krb5_error_code (_stdcall *p_krb5_kt_free_entry)
 253                         (krb5_context,krb5_keytab_entry * )=NULL;
 254 static krb5_error_code (_stdcall * p_krb5_auth_con_setrcache)(krb5_context,
 255                                                                krb5_auth_context,
 256                                                                krb5_rcache)=NULL;
 257 static krb5_error_code (_stdcall * p_krb5_get_server_rcache)(krb5_context,
 258                                                               krb5_const krb5_data *,
 259                                                               krb5_rcache *)=NULL;
 260 static krb5_error_code (* p_krb5_auth_con_getrcache)(krb5_context,
 261                                                       krb5_auth_context,
 262                                                       krb5_rcache *)=NULL;
 263 static krb5_error_code (_stdcall * p_krb5_kt_close)(krb5_context context,
 264                                                     krb5_keytab keytab)=NULL;
 265 static krb5_error_code (_stdcall * p_krb5_kt_get_entry)(krb5_context context,
 266                                                         krb5_keytab keytab,
 267                        krb5_const_principal principal, krb5_kvno vno,
 268                        krb5_enctype enctype, krb5_keytab_entry *entry)=NULL;
 269 static int krb5_loaded = 0;     /* only attempt to initialize func ptrs once */
 270
 271 /* Function to Load the Kerberos 5 DLL and initialize function pointers */
 272 void
 273 load_krb5_dll(void)
 274         {
 275         HANDLE hKRB5_32;
 276
 277         krb5_loaded++;
 278         hKRB5_32 = LoadLibrary("KRB5_32");
 279         if (!hKRB5_32)
 280                 return;
 281
 282         (FARPROC) p_krb5_free_data_contents =
 283                 GetProcAddress( hKRB5_32, "krb5_free_data_contents" );
 284         (FARPROC) p_krb5_free_context =
 285                 GetProcAddress( hKRB5_32, "krb5_free_context" );
 286         (FARPROC) p_krb5_auth_con_free =
 287                 GetProcAddress( hKRB5_32, "krb5_auth_con_free" );
 288         (FARPROC) p_krb5_free_principal =
 289                 GetProcAddress( hKRB5_32, "krb5_free_principal" );
 290         (FARPROC) p_krb5_mk_req_extended =
 291                 GetProcAddress( hKRB5_32, "krb5_mk_req_extended" );
 292         (FARPROC) p_krb5_get_credentials =
 293                 GetProcAddress( hKRB5_32, "krb5_get_credentials" );
 294         (FARPROC) p_krb5_cc_get_principal =
 295                 GetProcAddress( hKRB5_32, "krb5_cc_get_principal" );
 296         (FARPROC) p_krb5_cc_default =
 297                 GetProcAddress( hKRB5_32, "krb5_cc_default" );
 298         (FARPROC) p_krb5_sname_to_principal =
 299                 GetProcAddress( hKRB5_32, "krb5_sname_to_principal" );
 300         (FARPROC) p_krb5_init_context =
 301                 GetProcAddress( hKRB5_32, "krb5_init_context" );
 302         (FARPROC) p_krb5_free_ticket =
 303                 GetProcAddress( hKRB5_32, "krb5_free_ticket" );
 304         (FARPROC) p_krb5_rd_req =
 305                 GetProcAddress( hKRB5_32, "krb5_rd_req" );
 306         (FARPROC) p_krb5_principal_compare =
 307                 GetProcAddress( hKRB5_32, "krb5_principal_compare" );
 308         (FARPROC) p_krb5_decrypt_tkt_part =
 309                 GetProcAddress( hKRB5_32, "krb5_decrypt_tkt_part" );
 310         (FARPROC) p_krb5_timeofday =
 311                 GetProcAddress( hKRB5_32, "krb5_timeofday" );
 312         (FARPROC) p_krb5_rc_default =
 313                 GetProcAddress( hKRB5_32, "krb5_rc_default" );
 314         (FARPROC) p_krb5_rc_initialize =
 315                 GetProcAddress( hKRB5_32, "krb5_rc_initialize" );
 316         (FARPROC) p_krb5_rc_get_lifespan =
 317                 GetProcAddress( hKRB5_32, "krb5_rc_get_lifespan" );
 318         (FARPROC) p_krb5_rc_destroy =
 319                 GetProcAddress( hKRB5_32, "krb5_rc_destroy" );
 320         (FARPROC) p_krb5_kt_default =
 321                 GetProcAddress( hKRB5_32, "krb5_kt_default" );
 322         (FARPROC) p_krb5_kt_resolve =
 323                 GetProcAddress( hKRB5_32, "krb5_kt_resolve" );
 324         (FARPROC) p_krb5_auth_con_init =
 325                 GetProcAddress( hKRB5_32, "krb5_auth_con_init" );
 326         (FARPROC) p_valid_cksumtype =
 327                 GetProcAddress( hKRB5_32, "valid_cksumtype" );
 328         (FARPROC) p_krb5_checksum_size =
 329                 GetProcAddress( hKRB5_32, "krb5_checksum_size" );
 330         (FARPROC) p_krb5_kt_free_entry =
 331                 GetProcAddress( hKRB5_32, "krb5_kt_free_entry" );
 332         (FARPROC) p_krb5_auth_con_setrcache =
 333                 GetProcAddress( hKRB5_32, "krb5_auth_con_setrcache" );
 334         (FARPROC) p_krb5_get_server_rcache =
 335                 GetProcAddress( hKRB5_32, "krb5_get_server_rcache" );
 336         (FARPROC) p_krb5_auth_con_getrcache =
 337                 GetProcAddress( hKRB5_32, "krb5_auth_con_getrcache" );
 338         (FARPROC) p_krb5_kt_close =
 339                 GetProcAddress( hKRB5_32, "krb5_kt_close" );
 340         (FARPROC) p_krb5_kt_get_entry =
 341                 GetProcAddress( hKRB5_32, "krb5_kt_get_entry" );
 342         }
 343
 344 /* Stubs for each function to be dynamicly loaded */
 345 void
 346 kssl_krb5_free_data_contents(krb5_context CO, krb5_data  * data)
 347         {
 348         if (!krb5_loaded)
 349                 load_krb5_dll();
 350
 351         if ( p_krb5_free_data_contents )
 352                 p_krb5_free_data_contents(CO,data);
 353         }
 354
 355 krb5_error_code
 356 kssl_krb5_mk_req_extended (krb5_context CO,
 357                           krb5_auth_context  * pACO,
 358                           krb5_const krb5_flags F,
 359                           krb5_data  * pD1,
 360                           krb5_creds  * pC,
 361                           krb5_data  * pD2)
 362         {
 363         if (!krb5_loaded)
 364                 load_krb5_dll();
 365
 366         if ( p_krb5_mk_req_extended )
 367                 return(p_krb5_mk_req_extended(CO,pACO,F,pD1,pC,pD2));
 368         else
 369                 return KRB5KRB_ERR_GENERIC;
 370         }
 371 krb5_error_code
 372 kssl_krb5_auth_con_init(krb5_context CO,
 373                        krb5_auth_context  * pACO)
 374         {
 375         if (!krb5_loaded)
 376                 load_krb5_dll();
 377
 378         if ( p_krb5_auth_con_init )
 379                 return(p_krb5_auth_con_init(CO,pACO));
 380         else
 381                 return KRB5KRB_ERR_GENERIC;
 382         }
 383 krb5_error_code
 384 kssl_krb5_auth_con_free (krb5_context CO,
 385                         krb5_auth_context ACO)
 386         {
 387         if (!krb5_loaded)
 388                 load_krb5_dll();
 389
 390         if ( p_krb5_auth_con_free )
 391                 return(p_krb5_auth_con_free(CO,ACO));
 392         else
 393                 return KRB5KRB_ERR_GENERIC;
 394         }
 395 krb5_error_code
 396 kssl_krb5_get_credentials(krb5_context CO,
 397                          krb5_const krb5_flags F,
 398                          krb5_ccache CC,
 399                          krb5_creds  * pCR,
 400                          krb5_creds  ** ppCR)
 401         {
 402         if (!krb5_loaded)
 403                 load_krb5_dll();
 404
 405         if ( p_krb5_get_credentials )
 406                 return(p_krb5_get_credentials(CO,F,CC,pCR,ppCR));
 407         else
 408                 return KRB5KRB_ERR_GENERIC;
 409         }
 410 krb5_error_code
 411 kssl_krb5_sname_to_principal(krb5_context CO,
 412                             krb5_const char  * pC1,
 413                             krb5_const char  * pC2,
 414                             krb5_int32 I,
 415                             krb5_principal  * pPR)
 416         {
 417         if (!krb5_loaded)
 418                 load_krb5_dll();
 419
 420         if ( p_krb5_sname_to_principal )
 421                 return(p_krb5_sname_to_principal(CO,pC1,pC2,I,pPR));
 422         else
 423                 return KRB5KRB_ERR_GENERIC;
 424         }
 425
 426 krb5_error_code
 427 kssl_krb5_cc_default(krb5_context CO,
 428                     krb5_ccache  * pCC)
 429         {
 430         if (!krb5_loaded)
 431                 load_krb5_dll();
 432
 433         if ( p_krb5_cc_default )
 434                 return(p_krb5_cc_default(CO,pCC));
 435         else
 436                 return KRB5KRB_ERR_GENERIC;
 437         }
 438
 439 krb5_error_code
 440 kssl_krb5_init_context(krb5_context * pCO)
 441         {
 442         if (!krb5_loaded)
 443                 load_krb5_dll();
 444
 445         if ( p_krb5_init_context )
 446                 return(p_krb5_init_context(pCO));
 447         else
 448                 return KRB5KRB_ERR_GENERIC;
 449         }
 450
 451 void
 452 kssl_krb5_free_context(krb5_context CO)
 453         {
 454         if (!krb5_loaded)
 455                 load_krb5_dll();
 456
 457         if ( p_krb5_free_context )
 458                 p_krb5_free_context(CO);
 459         }
 460
 461 void
 462 kssl_krb5_free_principal(krb5_context c, krb5_principal p)
 463         {
 464         if (!krb5_loaded)
 465                 load_krb5_dll();
 466
 467         if ( p_krb5_free_principal )
 468                 p_krb5_free_principal(c,p);
 469         }
 470
 471 krb5_error_code
 472 kssl_krb5_kt_resolve(krb5_context con,
 473                     krb5_const char * sz,
 474                     krb5_keytab * kt)
 475         {
 476         if (!krb5_loaded)
 477                 load_krb5_dll();
 478
 479         if ( p_krb5_kt_resolve )
 480                 return(p_krb5_kt_resolve(con,sz,kt));
 481         else
 482                 return KRB5KRB_ERR_GENERIC;
 483         }
 484
 485 krb5_error_code
 486 kssl_krb5_kt_default(krb5_context con,
 487                     krb5_keytab * kt)
 488         {
 489         if (!krb5_loaded)
 490                 load_krb5_dll();
 491
 492         if ( p_krb5_kt_default )
 493                 return(p_krb5_kt_default(con,kt));
 494         else
 495                 return KRB5KRB_ERR_GENERIC;
 496         }
 497
 498 krb5_error_code
 499 kssl_krb5_free_ticket(krb5_context con,
 500                      krb5_ticket * kt)
 501         {
 502         if (!krb5_loaded)
 503                 load_krb5_dll();
 504
 505         if ( p_krb5_free_ticket )
 506                 return(p_krb5_free_ticket(con,kt));
 507         else
 508                 return KRB5KRB_ERR_GENERIC;
 509         }
 510
 511 krb5_error_code
 512 kssl_krb5_rd_req(krb5_context con, krb5_auth_context * pacon,
 513                 krb5_const krb5_data * data,
 514                 krb5_const_principal princ, krb5_keytab keytab,
 515                 krb5_flags * flags, krb5_ticket ** pptkt)
 516         {
 517         if (!krb5_loaded)
 518                 load_krb5_dll();
 519
 520         if ( p_krb5_rd_req )
 521                 return(p_krb5_rd_req(con,pacon,data,princ,keytab,flags,pptkt));
 522         else
 523                 return KRB5KRB_ERR_GENERIC;
 524         }
 525
 526 krb5_boolean
 527 krb5_principal_compare(krb5_context con, krb5_const_principal princ1,
 528                 krb5_const_principal princ2)
 529         {
 530         if (!krb5_loaded)
 531                 load_krb5_dll();
 532
 533         if ( p_krb5_principal_compare )
 534                 return(p_krb5_principal_compare(con,princ1,princ2));
 535         else
 536                 return KRB5KRB_ERR_GENERIC;
 537         }
 538
 539 krb5_error_code
 540 krb5_decrypt_tkt_part(krb5_context con, krb5_const krb5_keyblock *keys,
 541                 krb5_ticket *ticket)
 542         {
 543         if (!krb5_loaded)
 544                 load_krb5_dll();
 545
 546         if ( p_krb5_decrypt_tkt_part )
 547                 return(p_krb5_decrypt_tkt_part(con,keys,ticket));
 548         else
 549                 return KRB5KRB_ERR_GENERIC;
 550         }
 551
 552 krb5_error_code
 553 krb5_timeofday(krb5_context con, krb5_int32 *timeret)
 554         {
 555         if (!krb5_loaded)
 556                 load_krb5_dll();
 557
 558         if ( p_krb5_timeofday )
 559                 return(p_krb5_timeofday(con,timeret));
 560         else
 561                 return KRB5KRB_ERR_GENERIC;
 562         }
 563
 564 krb5_error_code
 565 krb5_rc_default(krb5_context con, krb5_rcache *rc)
 566         {
 567         if (!krb5_loaded)
 568                 load_krb5_dll();
 569
 570         if ( p_krb5_rc_default )
 571                 return(p_krb5_rc_default(con,rc));
 572         else
 573                 return KRB5KRB_ERR_GENERIC;
 574         }
 575
 576 krb5_error_code
 577 krb5_rc_initialize(krb5_context con, krb5_rcache rc, krb5_deltat lifespan)
 578         {
 579         if (!krb5_loaded)
 580                 load_krb5_dll();
 581
 582         if ( p_krb5_rc_initialize )
 583                 return(p_krb5_rc_initialize(con, rc, lifespan));
 584         else
 585                 return KRB5KRB_ERR_GENERIC;
 586         }
 587
 588 krb5_error_code
 589 krb5_rc_get_lifespan(krb5_context con, krb5_rcache rc, krb5_deltat *lifespanp)
 590         {
 591         if (!krb5_loaded)
 592                 load_krb5_dll();
 593
 594         if ( p_krb5_rc_get_lifespan )
 595                 return(p_krb5_rc_get_lifespan(con, rc, lifespanp));
 596         else
 597                 return KRB5KRB_ERR_GENERIC;
 598         }
 599
 600 krb5_error_code
 601 krb5_rc_destroy(krb5_context con, krb5_rcache rc)
 602         {
 603         if (!krb5_loaded)
 604                 load_krb5_dll();
 605
 606         if ( p_krb5_rc_destroy )
 607                 return(p_krb5_rc_destroy(con, rc));
 608         else
 609                 return KRB5KRB_ERR_GENERIC;
 610         }
 611
 612 size_t
 613 krb5_checksum_size(krb5_context context,krb5_cksumtype ctype)
 614         {
 615         if (!krb5_loaded)
 616                 load_krb5_dll();
 617
 618         if ( p_krb5_checksum_size )
 619                 return(p_krb5_checksum_size(context, ctype));
 620         else
 621                 return KRB5KRB_ERR_GENERIC;
 622         }
 623
 624 krb5_boolean
 625 valid_cksumtype(krb5_cksumtype ctype)
 626         {
 627         if (!krb5_loaded)
 628                 load_krb5_dll();
 629
 630         if ( p_valid_cksumtype )
 631                 return(p_valid_cksumtype(ctype));
 632         else
 633                 return KRB5KRB_ERR_GENERIC;
 634         }
 635
 636 krb5_error_code
 637 krb5_kt_free_entry(krb5_context con,krb5_keytab_entry * entry)
 638         {
 639         if (!krb5_loaded)
 640                 load_krb5_dll();
 641
 642         if ( p_krb5_kt_free_entry )
 643                 return(p_krb5_kt_free_entry(con,entry));
 644         else
 645                 return KRB5KRB_ERR_GENERIC;
 646         }
 647
 648 /* Structure definitions  */
 649 #ifndef NO_DEF_KRB5_CCACHE
 650 #ifndef krb5_x
 651 #define krb5_x(ptr,args) ((ptr)?((*(ptr)) args):(abort(),1))
 652 #define krb5_xc(ptr,args) ((ptr)?((*(ptr)) args):(abort(),(char*)0))
 653 #endif
 654
 655 typedef krb5_pointer    krb5_cc_cursor; /* cursor for sequential lookup */
 656
 657 typedef struct _krb5_ccache
 658         {
 659         krb5_magic magic;
 660         struct _krb5_cc_ops FAR *ops;
 661         krb5_pointer data;
 662         } *krb5_ccache;
 663
 664 typedef struct _krb5_cc_ops
 665         {
 666         krb5_magic magic;
 667         char  *prefix;
 668         char  * (KRB5_CALLCONV *get_name)
 669                 (krb5_context, krb5_ccache);
 670         krb5_error_code (KRB5_CALLCONV *resolve)
 671                 (krb5_context, krb5_ccache  *, const char  *);
 672         krb5_error_code (KRB5_CALLCONV *gen_new)
 673                 (krb5_context, krb5_ccache  *);
 674         krb5_error_code (KRB5_CALLCONV *init)
 675                 (krb5_context, krb5_ccache, krb5_principal);
 676         krb5_error_code (KRB5_CALLCONV *destroy)
 677                 (krb5_context, krb5_ccache);
 678         krb5_error_code (KRB5_CALLCONV *close)
 679                 (krb5_context, krb5_ccache);
 680         krb5_error_code (KRB5_CALLCONV *store)
 681                 (krb5_context, krb5_ccache, krb5_creds  *);
 682         krb5_error_code (KRB5_CALLCONV *retrieve)
 683                 (krb5_context, krb5_ccache,
 684                 krb5_flags, krb5_creds  *, krb5_creds  *);
 685         krb5_error_code (KRB5_CALLCONV *get_princ)
 686                 (krb5_context, krb5_ccache, krb5_principal  *);
 687         krb5_error_code (KRB5_CALLCONV *get_first)
 688                 (krb5_context, krb5_ccache, krb5_cc_cursor  *);
 689         krb5_error_code (KRB5_CALLCONV *get_next)
 690                 (krb5_context, krb5_ccache,
 691                 krb5_cc_cursor  *, krb5_creds  *);
 692         krb5_error_code (KRB5_CALLCONV *end_get)
 693                 (krb5_context, krb5_ccache, krb5_cc_cursor  *);
 694         krb5_error_code (KRB5_CALLCONV *remove_cred)
 695                 (krb5_context, krb5_ccache,
 696                 krb5_flags, krb5_creds  *);
 697         krb5_error_code (KRB5_CALLCONV *set_flags)
 698                 (krb5_context, krb5_ccache, krb5_flags);
 699         } krb5_cc_ops;
 700 #endif /* NO_DEF_KRB5_CCACHE */
 701
 702 krb5_error_code
 703 kssl_krb5_cc_get_principal
 704     (krb5_context context, krb5_ccache cache,
 705       krb5_principal *principal)
 706         {
 707         if ( p_krb5_cc_get_principal )
 708                 return(p_krb5_cc_get_principal(context,cache,principal));
 709         else
 710                 return(krb5_x
 711                         ((cache)->ops->get_princ,(context, cache, principal)));
 712         }
 713
 714 krb5_error_code
 715 kssl_krb5_auth_con_setrcache(krb5_context con, krb5_auth_context acon,
 716                              krb5_rcache rcache)
 717         {
 718         if ( p_krb5_auth_con_setrcache )
 719                  return(p_krb5_auth_con_setrcache(con,acon,rcache));
 720         else
 721                  return KRB5KRB_ERR_GENERIC;
 722         }
 723
 724 krb5_error_code
 725 kssl_krb5_get_server_rcache(krb5_context con, krb5_const krb5_data * data,
 726                             krb5_rcache * rcache)
 727         {
 728         if ( p_krb5_get_server_rcache )
 729                 return(p_krb5_get_server_rcache(con,data,rcache));
 730         else
 731                 return KRB5KRB_ERR_GENERIC;
 732         }
 733
 734 krb5_error_code
 735 kssl_krb5_auth_con_getrcache(krb5_context con, krb5_auth_context acon,
 736                              krb5_rcache * prcache)
 737         {
 738         if ( p_krb5_auth_con_getrcache )
 739                 return(p_krb5_auth_con_getrcache(con,acon, prcache));
 740         else
 741                 return KRB5KRB_ERR_GENERIC;
 742         }
 743
 744 krb5_error_code
 745 kssl_krb5_kt_close(krb5_context context, krb5_keytab keytab)
 746         {
 747         if ( p_krb5_kt_close )
 748                 return(p_krb5_kt_close(context,keytab));
 749         else
 750                 return KRB5KRB_ERR_GENERIC;
 751         }
 752
 753 krb5_error_code
 754 kssl_krb5_kt_get_entry(krb5_context context, krb5_keytab keytab,
 755                        krb5_const_principal principal, krb5_kvno vno,
 756                        krb5_enctype enctype, krb5_keytab_entry *entry)
 757         {
 758         if ( p_krb5_kt_get_entry )
 759                 return(p_krb5_kt_get_entry(context,keytab,principal,vno,enctype,entry));
 760         else
 761                 return KRB5KRB_ERR_GENERIC;
 762         }
 763 #endif  /* OPENSSL_SYS_WINDOWS || OPENSSL_SYS_WIN32 */
 764
 765 char
 766 *kstring(char *string)
 767         {
 768         static char     *null = "[NULL]";
 769
 770         return ((string == NULL)? null: string);
 771         }
 772
 773 #define MAXKNUM 255
 774 char
 775 *knumber(int len, krb5_octet *contents)
 776         {
 777         static char     buf[MAXKNUM+1];
 778         int             i;
 779
 780         BIO_snprintf(buf, MAXKNUM, "[%d] ", len);
 781
 782         for (i=0; i < len  &&  MAXKNUM > strlen(buf)+3; i++)
 783                 {
 784                 BIO_snprintf(&buf[strlen(buf)], 3, "%02x", contents[i]);
 785                 }
 786
 787         return (buf);
 788         }
 789
 790
 791 /*      Given KRB5 enctype (basically DES or 3DES),
 792 **      return closest match openssl EVP_ encryption algorithm.
 793 **      Return NULL for unknown or problematic (krb5_dk_encrypt) enctypes.
 794 **      Assume ENCTYPE_*_RAW (krb5_raw_encrypt) are OK.
 795 */
 796 EVP_CIPHER *
 797 kssl_map_enc(krb5_enctype enctype)
 798         {
 799         switch (enctype)
 800                 {
 801         case ENCTYPE_DES_HMAC_SHA1:             /*    EVP_des_cbc();       */
 802         case ENCTYPE_DES_CBC_CRC:
 803         case ENCTYPE_DES_CBC_MD4:
 804         case ENCTYPE_DES_CBC_MD5:
 805         case ENCTYPE_DES_CBC_RAW:
 806                                 return (EVP_CIPHER *) EVP_des_cbc();
 807                                 break;
 808         case ENCTYPE_DES3_CBC_SHA1:             /*    EVP_des_ede3_cbc();  */
 809         case ENCTYPE_DES3_CBC_SHA:
 810         case ENCTYPE_DES3_CBC_RAW:
 811                                 return (EVP_CIPHER *) EVP_des_ede3_cbc();
 812                                 break;
 813         default:                return (EVP_CIPHER *) NULL;
 814                                 break;
 815                 }
 816         }
 817
 818
 819 /*      Return true:1 if p "looks like" the start of the real authenticator
 820 **      described in kssl_skip_confound() below.  The ASN.1 pattern is
 821 **      "62 xx 30 yy" (APPLICATION-2, SEQUENCE), where xx-yy =~ 2, and
 822 **      xx and yy are possibly multi-byte length fields.
 823 */
 824 int     kssl_test_confound(unsigned char *p)
 825         {
 826         int     len = 2;
 827         int     xx = 0, yy = 0;
 828
 829         if (*p++ != 0x62)  return 0;
 830         if (*p > 0x82)  return 0;
 831         switch(*p)  {
 832                 case 0x82:  p++;          xx = (*p++ << 8);  xx += *p++;  break;
 833                 case 0x81:  p++;          xx =  *p++;  break;
 834                 case 0x80:  return 0;
 835                 default:    xx = *p++;  break;
 836                 }
 837         if (*p++ != 0x30)  return 0;
 838         if (*p > 0x82)  return 0;
 839         switch(*p)  {
 840                 case 0x82:  p++; len+=2;  yy = (*p++ << 8);  yy += *p++;  break;
 841                 case 0x81:  p++; len++;   yy =  *p++;  break;
 842                 case 0x80:  return 0;
 843                 default:    yy = *p++;  break;
 844                 }
 845
 846         return (xx - len == yy)? 1: 0;
 847         }
 848
 849 /*      Allocate, fill, and return cksumlens array of checksum lengths.
 850 **      This array holds just the unique elements from the krb5_cksumarray[].
 851 **      array[n] == 0 signals end of data.
 852 **
 853 **      The krb5_cksumarray[] was an internal variable that has since been
 854 **      replaced by a more general method for storing the data.  It should
 855 **      not be used.  Instead we use real API calls and make a guess for
 856 **      what the highest assigned CKSUMTYPE_ constant is.  As of 1.2.2
 857 **      it is 0x000c (CKSUMTYPE_HMAC_SHA1_DES3).  So we will use 0x0010.
 858 */
 859 size_t  *populate_cksumlens(void)
 860         {
 861         int             i, j, n;
 862         static size_t   *cklens = NULL;
 863
 864 #ifdef KRB5_MIT_OLD11
 865         n = krb5_max_cksum;
 866 #else
 867         n = 0x0010;
 868 #endif  /* KRB5_MIT_OLD11 */
 869
 870 #ifdef KRB5CHECKAUTH
 871         if (!cklens && !(cklens = (size_t *) calloc(sizeof(int),n+1)))  return NULL;
 872
 873         for (i=0; i < n; i++)  {
 874                 if (!valid_cksumtype(i))  continue;     /*  array has holes  */
 875                 for (j=0; j < n; j++)  {
 876                         if (cklens[j] == 0)  {
 877                                 cklens[j] = krb5_checksum_size(NULL,i);
 878                                 break;          /*  krb5 elem was new: add   */
 879                                 }
 880                         if (cklens[j] == krb5_checksum_size(NULL,i))  {
 881                                 break;          /*  ignore duplicate elements */
 882                                 }
 883                         }
 884                 }
 885 #endif  /* KRB5CHECKAUTH */
 886
 887         return cklens;
 888         }
 889
 890 /*      Return pointer to start of real authenticator within authenticator, or
 891 **      return NULL on error.
 892 **      Decrypted authenticator looks like this:
 893 **              [0 or 8 byte confounder] [4-24 byte checksum] [real authent'r]
 894 **      This hackery wouldn't be necessary if MIT KRB5 1.0.6 had the
 895 **      krb5_auth_con_getcksumtype() function advertised in its krb5.h.
 896 */
 897 unsigned char   *kssl_skip_confound(krb5_enctype etype, unsigned char *a)
 898         {
 899         int             i, conlen;
 900         size_t          cklen;
 901         static size_t   *cksumlens = NULL;
 902         unsigned char   *test_auth;
 903
 904         conlen = (etype)? 8: 0;
 905
 906         if (!cksumlens  &&  !(cksumlens = populate_cksumlens()))  return NULL;
 907         for (i=0; (cklen = cksumlens[i]) != 0; i++)
 908                 {
 909                 test_auth = a + conlen + cklen;
 910                 if (kssl_test_confound(test_auth))  return test_auth;
 911                 }
 912
 913         return NULL;
 914         }
 915
 916
 917 /*      Set kssl_err error info when reason text is a simple string
 918 **              kssl_err = struct { int reason; char text[KSSL_ERR_MAX+1]; }
 919 */
 920 void
 921 kssl_err_set(KSSL_ERR *kssl_err, int reason, char *text)
 922         {
 923         if (kssl_err == NULL)  return;
 924
 925         kssl_err->reason = reason;
 926         BIO_snprintf(kssl_err->text, KSSL_ERR_MAX, text);
 927         return;
 928         }
 929
 930
 931 /*      Display contents of krb5_data struct, for debugging
 932 */
 933 void
 934 print_krb5_data(char *label, krb5_data *kdata)
 935         {
 936         unsigned int    i;
 937
 938         printf("%s[%d] ", label, kdata->length);
 939         for (i=0; i < kdata->length; i++)
 940                 {
 941                 if (0 &&  isprint((int) kdata->data[i]))
 942                         printf( "%c ",  kdata->data[i]);
 943                 else
 944                         printf( "%02x ", (unsigned char) kdata->data[i]);
 945                 }
 946         printf("\n");
 947         }
 948
 949
 950 /*      Display contents of krb5_authdata struct, for debugging
 951 */
 952 void
 953 print_krb5_authdata(char *label, krb5_authdata **adata)
 954         {
 955         if (adata == NULL)
 956                 {
 957                 printf("%s, authdata==0\n", label);
 958                 return;
 959                 }
 960         printf("%s [%p]\n", label, adata);
 961 #if 0
 962         {
 963         int     i;
 964         printf("%s[at%d:%d] ", label, adata->ad_type, adata->length);
 965         for (i=0; i < adata->length; i++)
 966                 {
 967                 printf((isprint(adata->contents[i]))? "%c ": "%02x",
 968                         adata->contents[i]);
 969                 }
 970         printf("\n");
 971         }
 972 #endif
 973         }
 974
 975
 976 /*      Display contents of krb5_keyblock struct, for debugging
 977 */
 978 void
 979 print_krb5_keyblock(char *label, krb5_keyblock *keyblk)
 980         {
 981         unsigned int    i;
 982
 983         if (keyblk == NULL)
 984                 {
 985                 printf("%s, keyblk==0\n", label);
 986                 return;
 987                 }
 988 #ifdef KRB5_HEIMDAL
 989         printf("%s\n\t[et%d:%d]: ", label, keyblk->keytype,
 990                                            keyblk->keyvalue->length);
 991         for (i=0; i < keyblk->keyvalue->length; i++)
 992                 {
 993                 printf("%02x",(unsigned char *)(keyblk->keyvalue->contents)[i]);
 994                 }
 995         printf("\n");
 996 #else
 997         printf("%s\n\t[et%d:%d]: ", label, keyblk->enctype, keyblk->length);
 998         for (i=0; i < keyblk->length; i++)
 999                 {
1000                 printf("%02x",keyblk->contents[i]);
1001                 }
1002         printf("\n");
1003 #endif
1004         }
1005
1006
1007 /*      Display contents of krb5_principal_data struct, for debugging
1008 **      (krb5_principal is typedef'd == krb5_principal_data *)
1009 */
1010 void
1011 print_krb5_princ(char *label, krb5_principal_data *princ)
1012         {
1013         unsigned int    ui, uj;
1014         int i;
1015
1016         printf("%s principal Realm: ", label);
1017         if (princ == NULL)  return;
1018         for (ui=0; ui < princ->realm.length; ui++)  putchar(princ->realm.data[ui]);
1019         printf(" (nametype %d) has %d strings:\n", princ->type,princ->length);
1020         for (i=0; i < princ->length; i++)
1021                 {
1022                 printf("\t%d [%d]: ", i, princ->data[i].length);
1023                 for (uj=0; uj < princ->data[i].length; uj++)  {
1024                         putchar(princ->data[i].data[uj]);
1025                         }
1026                 printf("\n");
1027                 }
1028         return;
1029         }
1030
1031
1032 /*      Given krb5 service (typically "kssl") and hostname in kssl_ctx,
1033 **      Return encrypted Kerberos ticket for service @ hostname.
1034 **      If authenp is non-NULL, also return encrypted authenticator,
1035 **      whose data should be freed by caller.
1036 **      (Originally was: Create Kerberos AP_REQ message for SSL Client.)
1037 **
1038 **      19990628        VRS     Started; Returns Kerberos AP_REQ message.
1039 **      20010409        VRS     Modified for RFC2712; Returns enc tkt.
1040 **      20010606        VRS     May also return optional authenticator.
1041 */
1042 krb5_error_code
1043 kssl_cget_tkt(  /* UPDATE */    KSSL_CTX *kssl_ctx,
1044                 /* OUT    */    krb5_data **enc_ticketp,
1045                 /* UPDATE */    krb5_data *authenp,
1046                 /* OUT    */    KSSL_ERR *kssl_err)
1047         {
1048         krb5_error_code         krb5rc = KRB5KRB_ERR_GENERIC;
1049         krb5_context            krb5context = NULL;
1050         krb5_auth_context       krb5auth_context = NULL;
1051         krb5_ccache             krb5ccdef = NULL;
1052         krb5_creds              krb5creds, *krb5credsp = NULL;
1053         krb5_data               krb5_app_req;
1054
1055         kssl_err_set(kssl_err, 0, "");
1056         memset((char *)&krb5creds, 0, sizeof(krb5creds));
1057
1058         if (!kssl_ctx)
1059                 {
1060                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1061                         "No kssl_ctx defined.\n");
1062                 goto err;
1063                 }
1064         else if (!kssl_ctx->service_host)
1065                 {
1066                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1067                         "kssl_ctx service_host undefined.\n");
1068                 goto err;
1069                 }
1070
1071         if ((krb5rc = krb5_init_context(&krb5context)) != 0)
1072                 {
1073                 BIO_snprintf(kssl_err->text,KSSL_ERR_MAX,
1074                         "krb5_init_context() fails: %d\n", krb5rc);
1075                 kssl_err->reason = SSL_R_KRB5_C_INIT;
1076                 goto err;
1077                 }
1078
1079         if ((krb5rc = krb5_sname_to_principal(krb5context,
1080                 kssl_ctx->service_host,
1081                 (kssl_ctx->service_name)? kssl_ctx->service_name: KRB5SVC,
1082                 KRB5_NT_SRV_HST, &krb5creds.server)) != 0)
1083                 {
1084                 BIO_snprintf(kssl_err->text,KSSL_ERR_MAX,
1085                         "krb5_sname_to_principal() fails for %s/%s\n",
1086                         kssl_ctx->service_host,
1087                         (kssl_ctx->service_name)? kssl_ctx->service_name:
1088                                                   KRB5SVC);
1089                 kssl_err->reason = SSL_R_KRB5_C_INIT;
1090                 goto err;
1091                 }
1092
1093         if ((krb5rc = krb5_cc_default(krb5context, &krb5ccdef)) != 0)
1094                 {
1095                 kssl_err_set(kssl_err, SSL_R_KRB5_C_CC_PRINC,
1096                         "krb5_cc_default fails.\n");
1097                 goto err;
1098                 }
1099
1100         if ((krb5rc = krb5_cc_get_principal(krb5context, krb5ccdef,
1101                 &krb5creds.client)) != 0)
1102                 {
1103                 kssl_err_set(kssl_err, SSL_R_KRB5_C_CC_PRINC,
1104                         "krb5_cc_get_principal() fails.\n");
1105                 goto err;
1106                 }
1107
1108         if ((krb5rc = krb5_get_credentials(krb5context, 0, krb5ccdef,
1109                 &krb5creds, &krb5credsp)) != 0)
1110                 {
1111                 kssl_err_set(kssl_err, SSL_R_KRB5_C_GET_CRED,
1112                         "krb5_get_credentials() fails.\n");
1113                 goto err;
1114                 }
1115
1116         *enc_ticketp = &krb5credsp->ticket;
1117 #ifdef KRB5_HEIMDAL
1118         kssl_ctx->enctype = krb5credsp->session.keytype;
1119 #else
1120         kssl_ctx->enctype = krb5credsp->keyblock.enctype;
1121 #endif
1122
1123         krb5rc = KRB5KRB_ERR_GENERIC;
1124         /*      caller should free data of krb5_app_req  */
1125         /*  20010406 VRS deleted for real KerberosWrapper
1126         **  20010605 VRS reinstated to offer Authenticator to KerberosWrapper
1127         */
1128         krb5_app_req.length = 0;
1129         if (authenp)
1130                 {
1131                 krb5_data       krb5in_data;
1132                 unsigned char   *p;
1133                 long            arlen;
1134                 KRB5_APREQBODY  *ap_req;
1135
1136                 authenp->length = 0;
1137                 krb5in_data.data = NULL;
1138                 krb5in_data.length = 0;
1139                 if ((krb5rc = krb5_mk_req_extended(krb5context,
1140                         &krb5auth_context, 0, &krb5in_data, krb5credsp,
1141                         &krb5_app_req)) != 0)
1142                         {
1143                         kssl_err_set(kssl_err, SSL_R_KRB5_C_MK_REQ,
1144                                 "krb5_mk_req_extended() fails.\n");
1145                         goto err;
1146                         }
1147
1148                 arlen = krb5_app_req.length;
1149                 p = (unsigned char *)krb5_app_req.data;
1150                 ap_req = (KRB5_APREQBODY *) d2i_KRB5_APREQ(NULL, &p, arlen);
1151                 if (ap_req)
1152                         {
1153                         authenp->length = i2d_KRB5_ENCDATA(
1154                                         ap_req->authenticator, NULL);
1155                         if (authenp->length  &&
1156                                 (authenp->data = malloc(authenp->length)))
1157                                 {
1158                                 unsigned char   *adp = (unsigned char *)authenp->data;
1159                                 authenp->length = i2d_KRB5_ENCDATA(
1160                                                 ap_req->authenticator, &adp);
1161                                 }
1162                         }
1163
1164                 if (ap_req)  KRB5_APREQ_free((KRB5_APREQ *) ap_req);
1165                 if (krb5_app_req.length)
1166                         kssl_krb5_free_data_contents(krb5context,&krb5_app_req);
1167                 }
1168 #ifdef KRB5_HEIMDAL
1169         if (kssl_ctx_setkey(kssl_ctx, &krb5credsp->session))
1170                 {
1171                 kssl_err_set(kssl_err, SSL_R_KRB5_C_INIT,
1172                         "kssl_ctx_setkey() fails.\n");
1173                 }
1174 #else
1175         if (kssl_ctx_setkey(kssl_ctx, &krb5credsp->keyblock))
1176                 {
1177                 kssl_err_set(kssl_err, SSL_R_KRB5_C_INIT,
1178                         "kssl_ctx_setkey() fails.\n");
1179                 }
1180 #endif
1181         else    krb5rc = 0;
1182
1183  err:
1184 #ifdef KSSL_DEBUG
1185         kssl_ctx_show(kssl_ctx);
1186 #endif  /* KSSL_DEBUG */
1187
1188         if (krb5creds.client)   krb5_free_principal(krb5context,
1189                                                         krb5creds.client);
1190         if (krb5creds.server)   krb5_free_principal(krb5context,
1191                                                         krb5creds.server);
1192         if (krb5auth_context)   krb5_auth_con_free(krb5context,
1193                                                         krb5auth_context);
1194         if (krb5context)        krb5_free_context(krb5context);
1195         return (krb5rc);
1196         }
1197
1198
1199 /*  Given d2i_-decoded asn1ticket, allocate and return a new krb5_ticket.
1200 **  Return Kerberos error code and kssl_err struct on error.
1201 **  Allocates krb5_ticket and krb5_principal; caller should free these.
1202 **
1203 **      20010410        VRS     Implemented krb5_decode_ticket() as
1204 **                              old_krb5_decode_ticket(). Missing from MIT1.0.6.
1205 **      20010615        VRS     Re-cast as openssl/asn1 d2i_*() functions.
1206 **                              Re-used some of the old krb5_decode_ticket()
1207 **                              code here.  This tkt should alloc/free just
1208 **                              like the real thing.
1209 */
1210 krb5_error_code
1211 kssl_TKT2tkt(   /* IN     */    krb5_context    krb5context,
1212                 /* IN     */    KRB5_TKTBODY    *asn1ticket,
1213                 /* OUT    */    krb5_ticket     **krb5ticket,
1214                 /* OUT    */    KSSL_ERR *kssl_err  )
1215         {
1216         krb5_error_code                 krb5rc = KRB5KRB_ERR_GENERIC;
1217         krb5_ticket                     *new5ticket = NULL;
1218         ASN1_GENERALSTRING              *gstr_svc, *gstr_host;
1219
1220         *krb5ticket = NULL;
1221
1222         if (asn1ticket == NULL  ||  asn1ticket->realm == NULL  ||
1223                 asn1ticket->sname == NULL  ||
1224                 asn1ticket->sname->namestring == NULL  ||
1225                 asn1ticket->sname->namestring->num < 2)
1226                 {
1227                 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1228                         "Null field in asn1ticket.\n");
1229                 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1230                 return KRB5KRB_ERR_GENERIC;
1231                 }
1232
1233         if ((new5ticket = (krb5_ticket *) calloc(1, sizeof(krb5_ticket)))==NULL)
1234                 {
1235                 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1236                         "Unable to allocate new krb5_ticket.\n");
1237                 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1238                 return ENOMEM;          /*  or  KRB5KRB_ERR_GENERIC;    */
1239                 }
1240
1241         gstr_svc  = (ASN1_GENERALSTRING*)asn1ticket->sname->namestring->data[0];
1242         gstr_host = (ASN1_GENERALSTRING*)asn1ticket->sname->namestring->data[1];
1243
1244         if ((krb5rc = kssl_build_principal_2(krb5context,
1245                         &new5ticket->server,
1246                         asn1ticket->realm->length, asn1ticket->realm->data,
1247                         gstr_svc->length,  gstr_svc->data,
1248                         gstr_host->length, gstr_host->data)) != 0)
1249                 {
1250                 free(new5ticket);
1251                 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1252                         "Error building ticket server principal.\n");
1253                 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1254                 return krb5rc;          /*  or  KRB5KRB_ERR_GENERIC;    */
1255                 }
1256
1257         krb5_princ_type(krb5context, new5ticket->server) =
1258                         asn1ticket->sname->nametype->data[0];
1259         new5ticket->enc_part.enctype = asn1ticket->encdata->etype->data[0];
1260         new5ticket->enc_part.kvno = asn1ticket->encdata->kvno->data[0];
1261         new5ticket->enc_part.ciphertext.length =
1262                         asn1ticket->encdata->cipher->length;
1263         if ((new5ticket->enc_part.ciphertext.data =
1264                 calloc(1, asn1ticket->encdata->cipher->length)) == NULL)
1265                 {
1266                 free(new5ticket);
1267                 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1268                         "Error allocating cipher in krb5ticket.\n");
1269                 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1270                 return KRB5KRB_ERR_GENERIC;
1271                 }
1272         else
1273                 {
1274                 memcpy(new5ticket->enc_part.ciphertext.data,
1275                         asn1ticket->encdata->cipher->data,
1276                         asn1ticket->encdata->cipher->length);
1277                 }
1278
1279         *krb5ticket = new5ticket;
1280         return 0;
1281         }
1282
1283
1284 /*      Given krb5 service name in KSSL_CTX *kssl_ctx (typically "kssl"),
1285 **              and krb5 AP_REQ message & message length,
1286 **      Return Kerberos session key and client principle
1287 **              to SSL Server in KSSL_CTX *kssl_ctx.
1288 **
1289 **      19990702        VRS     Started.
1290 */
1291 krb5_error_code
1292 kssl_sget_tkt(  /* UPDATE */    KSSL_CTX                *kssl_ctx,
1293                 /* IN     */    krb5_data               *indata,
1294                 /* OUT    */    krb5_ticket_times       *ttimes,
1295                 /* OUT    */    KSSL_ERR                *kssl_err  )
1296         {
1297         krb5_error_code                 krb5rc = KRB5KRB_ERR_GENERIC;
1298         static krb5_context             krb5context = NULL;
1299         static krb5_auth_context        krb5auth_context = NULL;
1300         krb5_ticket                     *krb5ticket = NULL;
1301         KRB5_TKTBODY                    *asn1ticket = NULL;
1302         unsigned char                   *p;
1303         krb5_keytab                     krb5keytab = NULL;
1304         krb5_keytab_entry               kt_entry;
1305         krb5_principal                  krb5server;
1306         krb5_rcache                     rcache = NULL;
1307
1308         kssl_err_set(kssl_err, 0, "");
1309
1310         if (!kssl_ctx)
1311                 {
1312                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1313                         "No kssl_ctx defined.\n");
1314                 goto err;
1315                 }
1316
1317 #ifdef KSSL_DEBUG
1318         printf("in kssl_sget_tkt(%s)\n", kstring(kssl_ctx->service_name));
1319 #endif  /* KSSL_DEBUG */
1320
1321         if (!krb5context  &&  (krb5rc = krb5_init_context(&krb5context)))
1322                 {
1323                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1324                         "krb5_init_context() fails.\n");
1325                 goto err;
1326                 }
1327         if (krb5auth_context  &&
1328                 (krb5rc = krb5_auth_con_free(krb5context, krb5auth_context)))
1329                 {
1330                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1331                         "krb5_auth_con_free() fails.\n");
1332                 goto err;
1333                 }
1334         else  krb5auth_context = NULL;
1335         if (!krb5auth_context  &&
1336                 (krb5rc = krb5_auth_con_init(krb5context, &krb5auth_context)))
1337                 {
1338                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1339                         "krb5_auth_con_init() fails.\n");
1340                 goto err;
1341                 }
1342
1343
1344         if ((krb5rc = krb5_auth_con_getrcache(krb5context, krb5auth_context,
1345                 &rcache)))
1346                 {
1347                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1348                         "krb5_auth_con_getrcache() fails.\n");
1349                 goto err;
1350                 }
1351
1352         if ((krb5rc = krb5_sname_to_principal(krb5context, NULL,
1353                 (kssl_ctx->service_name)? kssl_ctx->service_name: KRB5SVC,
1354                 KRB5_NT_SRV_HST, &krb5server)) != 0)
1355                 {
1356                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1357                         "krb5_sname_to_principal() fails.\n");
1358                 goto err;
1359                 }
1360
1361         if (rcache == NULL)
1362                 {
1363                 if ((krb5rc = krb5_get_server_rcache(krb5context,
1364                         krb5_princ_component(krb5context, krb5server, 0),
1365                         &rcache)))
1366                         {
1367                         kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1368                                 "krb5_get_server_rcache() fails.\n");
1369                         goto err;
1370                         }
1371                 }
1372
1373         if ((krb5rc = krb5_auth_con_setrcache(krb5context, krb5auth_context, rcache)))
1374                 {
1375                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1376                         "krb5_auth_con_setrcache() fails.\n");
1377                 goto err;
1378                 }
1379
1380
1381         /*      kssl_ctx->keytab_file == NULL ==> use Kerberos default
1382         */
1383         if (kssl_ctx->keytab_file)
1384                 {
1385                 krb5rc = krb5_kt_resolve(krb5context, kssl_ctx->keytab_file,
1386                         &krb5keytab);
1387                 if (krb5rc)
1388                         {
1389                         kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1390                                 "krb5_kt_resolve() fails.\n");
1391                         goto err;
1392                         }
1393                 }
1394         else
1395                 {
1396                 krb5rc = krb5_kt_default(krb5context,&krb5keytab);
1397                 if (krb5rc)
1398                         {
1399                         kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1400                                 "krb5_kt_default() fails.\n");
1401                         goto err;
1402                         }
1403                 }
1404
1405         /*      Actual Kerberos5 krb5_recvauth() has initial conversation here
1406         **      o       check KRB5_SENDAUTH_BADAUTHVERS
1407         **              unless KRB5_RECVAUTH_SKIP_VERSION
1408         **      o       check KRB5_SENDAUTH_BADAPPLVERS
1409         **      o       send "0" msg if all OK
1410         */
1411
1412         /*  20010411 was using AP_REQ instead of true KerberosWrapper
1413         **
1414         **  if ((krb5rc = krb5_rd_req(krb5context, &krb5auth_context,
1415         **                      &krb5in_data, krb5server, krb5keytab,
1416         **                      &ap_option, &krb5ticket)) != 0)  { Error }
1417         */
1418
1419         p = (unsigned char *)indata->data;
1420         if ((asn1ticket = (KRB5_TKTBODY *) d2i_KRB5_TICKET(NULL, &p,
1421                                                 (long) indata->length)) == NULL)
1422                 {
1423                 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1424                         "d2i_KRB5_TICKET() ASN.1 decode failure.\n");
1425                 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1426                 goto err;
1427                 }
1428
1429         /* Was:  krb5rc = krb5_decode_ticket(krb5in_data,&krb5ticket)) != 0) */
1430         if ((krb5rc = kssl_TKT2tkt(krb5context, asn1ticket, &krb5ticket,
1431                                         kssl_err)) != 0)
1432                 {
1433                 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1434                         "Error converting ASN.1 ticket to krb5_ticket.\n");
1435                 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1436                 goto err;
1437                 }
1438
1439         if (! krb5_principal_compare(krb5context, krb5server,
1440                                                   krb5ticket->server))  {
1441                 krb5rc = KRB5_PRINC_NOMATCH;
1442                 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1443                         "server principal != ticket principal\n");
1444                 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1445                 goto err;
1446                 }
1447         if ((krb5rc = krb5_kt_get_entry(krb5context, krb5keytab,
1448                         krb5ticket->server, krb5ticket->enc_part.kvno,
1449                         krb5ticket->enc_part.enctype, &kt_entry)) != 0)  {
1450                 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1451                         "krb5_kt_get_entry() fails with %x.\n", krb5rc);
1452                 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1453                 goto err;
1454                 }
1455         if ((krb5rc = krb5_decrypt_tkt_part(krb5context, &kt_entry.key,
1456                         krb5ticket)) != 0)  {
1457                 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1458                         "krb5_decrypt_tkt_part() failed.\n");
1459                 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1460                 goto err;
1461                 }
1462         else  {
1463                 krb5_kt_free_entry(krb5context, &kt_entry);
1464 #ifdef KSSL_DEBUG
1465                 {
1466                 int i; krb5_address **paddr = krb5ticket->enc_part2->caddrs;
1467                 printf("Decrypted ticket fields:\n");
1468                 printf("\tflags: %X, transit-type: %X",
1469                         krb5ticket->enc_part2->flags,
1470                         krb5ticket->enc_part2->transited.tr_type);
1471                 print_krb5_data("\ttransit-data: ",
1472                         &(krb5ticket->enc_part2->transited.tr_contents));
1473                 printf("\tcaddrs: %p, authdata: %p\n",
1474                         krb5ticket->enc_part2->caddrs,
1475                         krb5ticket->enc_part2->authorization_data);
1476                 if (paddr)
1477                         {
1478                         printf("\tcaddrs:\n");
1479                         for (i=0; paddr[i] != NULL; i++)
1480                                 {
1481                                 krb5_data d;
1482                                 d.length=paddr[i]->length;
1483                                 d.data=paddr[i]->contents;
1484                                 print_krb5_data("\t\tIP: ", &d);
1485                                 }
1486                         }
1487                 printf("\tstart/auth/end times: %d / %d / %d\n",
1488                         krb5ticket->enc_part2->times.starttime,
1489                         krb5ticket->enc_part2->times.authtime,
1490                         krb5ticket->enc_part2->times.endtime);
1491                 }
1492 #endif  /* KSSL_DEBUG */
1493                 }
1494
1495         krb5rc = KRB5_NO_TKT_SUPPLIED;
1496         if (!krb5ticket  ||     !krb5ticket->enc_part2  ||
1497                 !krb5ticket->enc_part2->client  ||
1498                 !krb5ticket->enc_part2->client->data  ||
1499                 !krb5ticket->enc_part2->session)
1500                 {
1501                 kssl_err_set(kssl_err, SSL_R_KRB5_S_BAD_TICKET,
1502                         "bad ticket from krb5_rd_req.\n");
1503                 }
1504         else if (kssl_ctx_setprinc(kssl_ctx, KSSL_CLIENT,
1505                 &krb5ticket->enc_part2->client->realm,
1506                 krb5ticket->enc_part2->client->data))
1507                 {
1508                 kssl_err_set(kssl_err, SSL_R_KRB5_S_BAD_TICKET,
1509                         "kssl_ctx_setprinc() fails.\n");
1510                 }
1511         else if (kssl_ctx_setkey(kssl_ctx, krb5ticket->enc_part2->session))
1512                 {
1513                 kssl_err_set(kssl_err, SSL_R_KRB5_S_BAD_TICKET,
1514                         "kssl_ctx_setkey() fails.\n");
1515                 }
1516         else if (krb5ticket->enc_part2->flags & TKT_FLG_INVALID)
1517                 {
1518                 krb5rc = KRB5KRB_AP_ERR_TKT_INVALID;
1519                 kssl_err_set(kssl_err, SSL_R_KRB5_S_BAD_TICKET,
1520                         "invalid ticket from krb5_rd_req.\n");
1521                 }
1522         else    krb5rc = 0;
1523
1524         kssl_ctx->enctype       = krb5ticket->enc_part.enctype;
1525         ttimes->authtime        = krb5ticket->enc_part2->times.authtime;
1526         ttimes->starttime       = krb5ticket->enc_part2->times.starttime;
1527         ttimes->endtime         = krb5ticket->enc_part2->times.endtime;
1528         ttimes->renew_till      = krb5ticket->enc_part2->times.renew_till;
1529
1530  err:
1531 #ifdef KSSL_DEBUG
1532         kssl_ctx_show(kssl_ctx);
1533 #endif  /* KSSL_DEBUG */
1534
1535         if (asn1ticket)         KRB5_TICKET_free((KRB5_TICKET *) asn1ticket);
1536         if (krb5keytab)         krb5_kt_close(krb5context, krb5keytab);
1537         if (krb5ticket)         krb5_free_ticket(krb5context, krb5ticket);
1538         if (krb5server)         krb5_free_principal(krb5context, krb5server);
1539         return (krb5rc);
1540         }
1541
1542
1543 /*      Allocate & return a new kssl_ctx struct.
1544 */
1545 KSSL_CTX        *
1546 kssl_ctx_new(void)
1547         {
1548         return ((KSSL_CTX *) calloc(1, sizeof(KSSL_CTX)));
1549         }
1550
1551
1552 /*      Frees a kssl_ctx struct and any allocated memory it holds.
1553 **      Returns NULL.
1554 */
1555 KSSL_CTX        *
1556 kssl_ctx_free(KSSL_CTX *kssl_ctx)
1557         {
1558         if (kssl_ctx == NULL)  return kssl_ctx;
1559
1560         if (kssl_ctx->key)              memset(kssl_ctx->key, 0,
1561                                                               kssl_ctx->length);
1562         if (kssl_ctx->key)              free(kssl_ctx->key);
1563         if (kssl_ctx->client_princ)     free(kssl_ctx->client_princ);
1564         if (kssl_ctx->service_host)     free(kssl_ctx->service_host);
1565         if (kssl_ctx->service_name)     free(kssl_ctx->service_name);
1566         if (kssl_ctx->keytab_file)      free(kssl_ctx->keytab_file);
1567
1568         free(kssl_ctx);
1569         return (KSSL_CTX *) NULL;
1570         }
1571
1572
1573 /*      Given a (krb5_data *) entity (and optional realm),
1574 **      set the plain (char *) client_princ or service_host member
1575 **      of the kssl_ctx struct.
1576 */
1577 krb5_error_code
1578 kssl_ctx_setprinc(KSSL_CTX *kssl_ctx, int which,
1579         krb5_data *realm, krb5_data *entity)
1580         {
1581         char    **princ;
1582         int     length;
1583
1584         if (kssl_ctx == NULL  ||  entity == NULL)  return KSSL_CTX_ERR;
1585
1586         switch (which)
1587                 {
1588         case KSSL_CLIENT:       princ = &kssl_ctx->client_princ;        break;
1589         case KSSL_SERVER:       princ = &kssl_ctx->service_host;        break;
1590         default:                return KSSL_CTX_ERR;                    break;
1591                 }
1592         if (*princ)  free(*princ);
1593
1594         length = entity->length + ((realm)? realm->length + 2: 1);
1595         if ((*princ = calloc(1, length)) == NULL)
1596                 return KSSL_CTX_ERR;
1597         else
1598                 {
1599                 strncpy(*princ, entity->data, entity->length);
1600                 if (realm)
1601                         {
1602                         strcat (*princ, "@");
1603                         (void) strncat(*princ, realm->data, realm->length);
1604                         }
1605                 }
1606
1607         return KSSL_CTX_OK;
1608         }
1609
1610
1611 /*      Set one of the plain (char *) string members of the kssl_ctx struct.
1612 **      Default values should be:
1613 **              which == KSSL_SERVICE   =>      "khost" (KRB5SVC)
1614 **              which == KSSL_KEYTAB    =>      "/etc/krb5.keytab" (KRB5KEYTAB)
1615 */
1616 krb5_error_code
1617 kssl_ctx_setstring(KSSL_CTX *kssl_ctx, int which, char *text)
1618         {
1619         char    **string;
1620
1621         if (!kssl_ctx)  return KSSL_CTX_ERR;
1622
1623         switch (which)
1624                 {
1625         case KSSL_SERVICE:      string = &kssl_ctx->service_name;       break;
1626         case KSSL_SERVER:       string = &kssl_ctx->service_host;       break;
1627         case KSSL_CLIENT:       string = &kssl_ctx->client_princ;       break;
1628         case KSSL_KEYTAB:       string = &kssl_ctx->keytab_file;        break;
1629         default:                return KSSL_CTX_ERR;                    break;
1630                 }
1631         if (*string)  free(*string);
1632
1633         if (!text)
1634                 {
1635                 *string = '\0';
1636                 return KSSL_CTX_OK;
1637                 }
1638
1639         if ((*string = calloc(1, strlen(text) + 1)) == NULL)
1640                 return KSSL_CTX_ERR;
1641         else
1642                 strcpy(*string, text);
1643
1644         return KSSL_CTX_OK;
1645         }
1646
1647
1648 /*      Copy the Kerberos session key from a (krb5_keyblock *) to a kssl_ctx
1649 **      struct.  Clear kssl_ctx->key if Kerberos session key is NULL.
1650 */
1651 krb5_error_code
1652 kssl_ctx_setkey(KSSL_CTX *kssl_ctx, krb5_keyblock *session)
1653         {
1654         int             length;
1655         krb5_enctype    enctype;
1656         krb5_octet FAR  *contents = NULL;
1657
1658         if (!kssl_ctx)  return KSSL_CTX_ERR;
1659
1660         if (kssl_ctx->key)
1661                 {
1662                 memset(kssl_ctx->key, 0, kssl_ctx->length);
1663                 free(kssl_ctx->key);
1664                 }
1665
1666         if (session)
1667                 {
1668
1669 #ifdef KRB5_HEIMDAL
1670                 length = session->keyvalue->length;
1671                 enctype = session->keytype;
1672                 contents = session->keyvalue->contents;
1673 #else
1674                 length = session->length;
1675                 enctype = session->enctype;
1676                 contents = session->contents;
1677 #endif
1678                 kssl_ctx->enctype = enctype;
1679                 kssl_ctx->length  = length;
1680                 }
1681         else
1682                 {
1683                 kssl_ctx->enctype = ENCTYPE_UNKNOWN;
1684                 kssl_ctx->length  = 0;
1685                 return KSSL_CTX_OK;
1686                 }
1687
1688         if ((kssl_ctx->key =
1689                 (krb5_octet FAR *) calloc(1, kssl_ctx->length)) == NULL)
1690                 {
1691                 kssl_ctx->length  = 0;
1692                 return KSSL_CTX_ERR;
1693                 }
1694         else
1695                 memcpy(kssl_ctx->key, contents, length);
1696
1697         return KSSL_CTX_OK;
1698         }
1699
1700
1701 /*      Display contents of kssl_ctx struct
1702 */
1703 void
1704 kssl_ctx_show(KSSL_CTX *kssl_ctx)
1705         {
1706         int     i;
1707
1708         printf("kssl_ctx: ");
1709         if (kssl_ctx == NULL)
1710                 {
1711                 printf("NULL\n");
1712                 return;
1713                 }
1714         else
1715                 printf("%p\n", kssl_ctx);
1716
1717         printf("\tservice:\t%s\n",
1718                 (kssl_ctx->service_name)? kssl_ctx->service_name: "NULL");
1719         printf("\tclient:\t%s\n",
1720                 (kssl_ctx->client_princ)? kssl_ctx->client_princ: "NULL");
1721         printf("\tserver:\t%s\n",
1722                 (kssl_ctx->service_host)? kssl_ctx->service_host: "NULL");
1723         printf("\tkeytab:\t%s\n",
1724                 (kssl_ctx->keytab_file)? kssl_ctx->keytab_file: "NULL");
1725         printf("\tkey [%d:%d]:\t",
1726                 kssl_ctx->enctype, kssl_ctx->length);
1727
1728         for (i=0; i < kssl_ctx->length  &&  kssl_ctx->key; i++)
1729                 {
1730                 printf("%02x", kssl_ctx->key[i]);
1731                 }
1732         printf("\n");
1733         return;
1734         }
1735
1736     int
1737     kssl_keytab_is_available(KSSL_CTX *kssl_ctx)
1738 {
1739     krb5_context                krb5context = NULL;
1740     krb5_keytab                 krb5keytab = NULL;
1741     krb5_keytab_entry           entry;
1742     krb5_principal              princ = NULL;
1743     krb5_error_code             krb5rc = KRB5KRB_ERR_GENERIC;
1744     int rc = 0;
1745
1746     if ((krb5rc = krb5_init_context(&krb5context)))
1747         return(0);
1748
1749     /*  kssl_ctx->keytab_file == NULL ==> use Kerberos default
1750     */
1751     if (kssl_ctx->keytab_file)
1752     {
1753         krb5rc = krb5_kt_resolve(krb5context, kssl_ctx->keytab_file,
1754                                   &krb5keytab);
1755         if (krb5rc)
1756             goto exit;
1757     }
1758     else
1759     {
1760         krb5rc = krb5_kt_default(krb5context,&krb5keytab);
1761         if (krb5rc)
1762             goto exit;
1763     }
1764
1765     /* the host key we are looking for */
1766     krb5rc = krb5_sname_to_principal(krb5context, NULL,
1767                                      kssl_ctx->service_name ? kssl_ctx->service_name: KRB5SVC,
1768                                      KRB5_NT_SRV_HST, &princ);
1769
1770     krb5rc = krb5_kt_get_entry(krb5context, krb5keytab,
1771                                 princ,
1772                                 0 /* IGNORE_VNO */,
1773                                 0 /* IGNORE_ENCTYPE */,
1774                                 &entry);
1775     if ( krb5rc == KRB5_KT_NOTFOUND ) {
1776         rc = 1;
1777         goto exit;
1778     } else if ( krb5rc )
1779         goto exit;
1780
1781     krb5_kt_free_entry(krb5context, &entry);
1782     rc = 1;
1783
1784   exit:
1785     if (krb5keytab)     krb5_kt_close(krb5context, krb5keytab);
1786     if (princ)          krb5_free_principal(krb5context, princ);
1787     if (krb5context)    krb5_free_context(krb5context);
1788     return(rc);
1789 }
1790
1791 int
1792 kssl_tgt_is_available(KSSL_CTX *kssl_ctx)
1793         {
1794         krb5_error_code         krb5rc = KRB5KRB_ERR_GENERIC;
1795         krb5_context            krb5context = NULL;
1796         krb5_ccache             krb5ccdef = NULL;
1797         krb5_creds              krb5creds, *krb5credsp = NULL;
1798         int                     rc = 0;
1799
1800         memset((char *)&krb5creds, 0, sizeof(krb5creds));
1801
1802         if (!kssl_ctx)
1803             return(0);
1804
1805         if (!kssl_ctx->service_host)
1806             return(0);
1807
1808         if ((krb5rc = krb5_init_context(&krb5context)) != 0)
1809             goto err;
1810
1811         if ((krb5rc = krb5_sname_to_principal(krb5context,
1812                                               kssl_ctx->service_host,
1813                                               (kssl_ctx->service_name)? kssl_ctx->service_name: KRB5SVC,
1814                                               KRB5_NT_SRV_HST, &krb5creds.server)) != 0)
1815             goto err;
1816
1817         if ((krb5rc = krb5_cc_default(krb5context, &krb5ccdef)) != 0)
1818             goto err;
1819
1820         if ((krb5rc = krb5_cc_get_principal(krb5context, krb5ccdef,
1821                                              &krb5creds.client)) != 0)
1822             goto err;
1823
1824         if ((krb5rc = krb5_get_credentials(krb5context, 0, krb5ccdef,
1825                                             &krb5creds, &krb5credsp)) != 0)
1826             goto err;
1827
1828         rc = 1;
1829
1830       err:
1831 #ifdef KSSL_DEBUG
1832         kssl_ctx_show(kssl_ctx);
1833 #endif  /* KSSL_DEBUG */
1834
1835         if (krb5creds.client)   krb5_free_principal(krb5context, krb5creds.client);
1836         if (krb5creds.server)   krb5_free_principal(krb5context, krb5creds.server);
1837         if (krb5context)        krb5_free_context(krb5context);
1838         return(rc);
1839         }
1840
1841 #if !defined(OPENSSL_SYS_WINDOWS) && !defined(OPENSSL_SYS_WIN32)
1842 void kssl_krb5_free_data_contents(krb5_context context, krb5_data *data)
1843         {
1844 #ifdef KRB5_HEIMDAL
1845         data->length = 0;
1846         if (data->data)
1847             free(data->data);
1848 #elif defined(KRB5_MIT_OLD11)
1849         if (data->data)  {
1850                 krb5_xfree(data->data);
1851                 data->data = 0;
1852                 }
1853 #else
1854         krb5_free_data_contents(NULL, data);
1855 #endif
1856         }
1857 #endif /* !OPENSSL_SYS_WINDOWS && !OPENSSL_SYS_WIN32 */
1858
1859
1860 /*  Given pointers to KerberosTime and struct tm structs, convert the
1861 **  KerberosTime string to struct tm.  Note that KerberosTime is a
1862 **  ASN1_GENERALIZEDTIME value, constrained to GMT with no fractional
1863 **  seconds as defined in RFC 1510.
1864 **  Return pointer to the (partially) filled in struct tm on success,
1865 **  return NULL on failure.
1866 */
1867 struct tm       *k_gmtime(ASN1_GENERALIZEDTIME *gtime, struct tm *k_tm)
1868         {
1869         char            c, *p;
1870
1871         if (!k_tm)  return NULL;
1872         if (gtime == NULL  ||  gtime->length < 14)  return NULL;
1873         if (gtime->data == NULL)  return NULL;
1874
1875         p = (char *)&gtime->data[14];
1876
1877         c = *p;  *p = '\0';  p -= 2;  k_tm->tm_sec  = atoi(p);      *(p+2) = c;
1878         c = *p;  *p = '\0';  p -= 2;  k_tm->tm_min  = atoi(p);      *(p+2) = c;
1879         c = *p;  *p = '\0';  p -= 2;  k_tm->tm_hour = atoi(p);      *(p+2) = c;
1880         c = *p;  *p = '\0';  p -= 2;  k_tm->tm_mday = atoi(p);      *(p+2) = c;
1881         c = *p;  *p = '\0';  p -= 2;  k_tm->tm_mon  = atoi(p)-1;    *(p+2) = c;
1882         c = *p;  *p = '\0';  p -= 4;  k_tm->tm_year = atoi(p)-1900; *(p+4) = c;
1883
1884         return k_tm;
1885         }
1886
1887
1888 /*  Helper function for kssl_validate_times().
1889 **  We need context->clockskew, but krb5_context is an opaque struct.
1890 **  So we try to sneek the clockskew out through the replay cache.
1891 **      If that fails just return a likely default (300 seconds).
1892 */
1893 krb5_deltat     get_rc_clockskew(krb5_context context)
1894         {
1895         krb5_rcache     rc;
1896         krb5_deltat     clockskew;
1897
1898         if (krb5_rc_default(context, &rc))  return KSSL_CLOCKSKEW;
1899         if (krb5_rc_initialize(context, rc, 0))  return KSSL_CLOCKSKEW;
1900         if (krb5_rc_get_lifespan(context, rc, &clockskew))  {
1901                 clockskew = KSSL_CLOCKSKEW;
1902                 }
1903         (void) krb5_rc_destroy(context, rc);
1904         return clockskew;
1905         }
1906
1907
1908 /*  kssl_validate_times() combines (and more importantly exposes)
1909 **  the MIT KRB5 internal function krb5_validate_times() and the
1910 **  in_clock_skew() macro.  The authenticator client time is checked
1911 **  to be within clockskew secs of the current time and the current
1912 **  time is checked to be within the ticket start and expire times.
1913 **  Either check may be omitted by supplying a NULL value.
1914 **  Returns 0 for valid times, SSL_R_KRB5* error codes otherwise.
1915 **  See Also: (Kerberos source)/krb5/lib/krb5/krb/valid_times.c
1916 **  20010420 VRS
1917 */
1918 krb5_error_code  kssl_validate_times(   krb5_timestamp atime,
1919                                         krb5_ticket_times *ttimes)
1920         {
1921         krb5_deltat     skew;
1922         krb5_timestamp  start, now;
1923         krb5_error_code rc;
1924         krb5_context    context;
1925
1926         if ((rc = krb5_init_context(&context)))  return SSL_R_KRB5_S_BAD_TICKET;
1927         skew = get_rc_clockskew(context);
1928         if ((rc = krb5_timeofday(context,&now))) return SSL_R_KRB5_S_BAD_TICKET;
1929         krb5_free_context(context);
1930
1931         if (atime  &&  labs(atime - now) >= skew)  return SSL_R_KRB5_S_TKT_SKEW;
1932
1933         if (! ttimes)  return 0;
1934
1935         start = (ttimes->starttime != 0)? ttimes->starttime: ttimes->authtime;
1936         if (start - now > skew)  return SSL_R_KRB5_S_TKT_NYV;
1937         if ((now - ttimes->endtime) > skew)  return SSL_R_KRB5_S_TKT_EXPIRED;
1938
1939 #ifdef KSSL_DEBUG
1940         printf("kssl_validate_times: %d |<-  | %d - %d | < %d  ->| %d\n",
1941                 start, atime, now, skew, ttimes->endtime);
1942 #endif  /* KSSL_DEBUG */
1943
1944         return 0;
1945         }
1946
1947
1948 /*  Decode and decrypt given DER-encoded authenticator, then pass
1949 **  authenticator ctime back in *atimep (or 0 if time unavailable).
1950 **  Returns krb5_error_code and kssl_err on error.  A NULL
1951 **  authenticator (authentp->length == 0) is not considered an error.
1952 **  Note that kssl_check_authent() makes use of the KRB5 session key;
1953 **  you must call kssl_sget_tkt() to get the key before calling this routine.
1954 */
1955 krb5_error_code  kssl_check_authent(
1956                         /* IN     */    KSSL_CTX        *kssl_ctx,
1957                         /* IN     */    krb5_data       *authentp,
1958                         /* OUT    */    krb5_timestamp  *atimep,
1959                         /* OUT    */    KSSL_ERR        *kssl_err  )
1960         {
1961         krb5_error_code         krb5rc = 0;
1962         KRB5_ENCDATA            *dec_authent = NULL;
1963         KRB5_AUTHENTBODY        *auth = NULL;
1964         krb5_enctype            enctype;
1965         EVP_CIPHER_CTX          ciph_ctx;
1966         EVP_CIPHER              *enc = NULL;
1967         unsigned char           iv[EVP_MAX_IV_LENGTH];
1968         unsigned char           *p, *unenc_authent;
1969         int                     padl, outl, unencbufsize;
1970         struct tm               tm_time, *tm_l, *tm_g;
1971         time_t                  now, tl, tg, tr, tz_offset;
1972
1973         *atimep = 0;
1974         kssl_err_set(kssl_err, 0, "");
1975
1976 #ifndef KRB5CHECKAUTH
1977         authentp = NULL;
1978 #else
1979 #if     KRB5CHECKAUTH == 0
1980         authentp = NULL;
1981 #endif
1982 #endif  /* KRB5CHECKAUTH */
1983
1984         if (authentp == NULL  ||  authentp->length == 0)  return 0;
1985
1986 #ifdef KSSL_DEBUG
1987         {
1988         unsigned int ui;
1989         printf("kssl_check_authent: authenticator[%d]:\n",authentp->length);
1990         p = authentp->data;
1991         for (ui=0; ui < authentp->length; ui++)  printf("%02x ",p[ui]);
1992         printf("\n");
1993         }
1994 #endif  /* KSSL_DEBUG */
1995
1996         unencbufsize = 2 * authentp->length;
1997         if ((unenc_authent = calloc(1, unencbufsize)) == NULL)
1998                 {
1999                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
2000                         "Unable to allocate authenticator buffer.\n");
2001                 krb5rc = KRB5KRB_ERR_GENERIC;
2002                 goto err;
2003                 }
2004
2005         p = (unsigned char *)authentp->data;
2006         if ((dec_authent = d2i_KRB5_ENCDATA(NULL, &p,
2007                                         (long) authentp->length)) == NULL)
2008                 {
2009                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
2010                         "Error decoding authenticator.\n");
2011                 krb5rc = KRB5KRB_AP_ERR_BAD_INTEGRITY;
2012                 goto err;
2013                 }
2014
2015         enctype = dec_authent->etype->data[0];  /* should = kssl_ctx->enctype */
2016 #if !defined(KRB5_MIT_OLD11)
2017             switch ( enctype ) {
2018             case ENCTYPE_DES3_CBC_SHA1:         /*    EVP_des_ede3_cbc();  */
2019             case ENCTYPE_DES3_CBC_SHA:
2020             case ENCTYPE_DES3_CBC_RAW:
2021                 krb5rc = 0;                     /* Skip, can't handle derived keys */
2022                 goto err;
2023             }
2024 #endif
2025         enc = kssl_map_enc(enctype);
2026         memset(iv, 0, EVP_MAX_IV_LENGTH);       /* per RFC 1510 */
2027
2028         if (enc == NULL)
2029                 {
2030                 /*  Disable kssl_check_authent for ENCTYPE_DES3_CBC_SHA1.
2031                 **  This enctype indicates the authenticator was encrypted
2032                 **  using key-usage derived keys which openssl cannot decrypt.
2033                 */
2034                 goto err;
2035                 }
2036         if (!EVP_DecryptInit_ex(&ciph_ctx, enc, NULL, kssl_ctx->key, iv))
2037                 {
2038                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
2039                         "EVP_DecryptInit_ex error decrypting authenticator.\n");
2040                 krb5rc = KRB5KRB_AP_ERR_BAD_INTEGRITY;
2041                 goto err;
2042                 }
2043         if (!EVP_DecryptUpdate(&ciph_ctx, unenc_authent, &outl,
2044                         dec_authent->cipher->data, dec_authent->cipher->length))
2045                 {
2046                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
2047                         "EVP_DecryptUpdate error decrypting authenticator.\n");
2048                 krb5rc = KRB5KRB_AP_ERR_BAD_INTEGRITY;
2049                 goto err;
2050                 }
2051         if (outl > unencbufsize)
2052                 {
2053                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
2054                         "Buffer overflow decrypting authenticator.\n");
2055                 krb5rc = KRB5KRB_AP_ERR_BAD_INTEGRITY;
2056                 goto err;
2057                 }
2058         if (!EVP_DecryptFinal_ex(&ciph_ctx, &(unenc_authent[outl]), &padl))
2059                 {
2060                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
2061                         "EVP_DecryptFinal_ex error decrypting authenticator.\n");
2062                 krb5rc = KRB5KRB_AP_ERR_BAD_INTEGRITY;
2063                 goto err;
2064                 }
2065         outl += padl;
2066         if (outl > unencbufsize)
2067                 {
2068                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
2069                         "Buffer overflow decrypting authenticator.\n");
2070                 krb5rc = KRB5KRB_AP_ERR_BAD_INTEGRITY;
2071                 goto err;
2072                 }
2073         EVP_CIPHER_CTX_cleanup(&ciph_ctx);
2074
2075 #ifdef KSSL_DEBUG
2076         printf("kssl_check_authent: decrypted authenticator[%d] =\n", outl);
2077         for (padl=0; padl < outl; padl++) printf("%02x ",unenc_authent[padl]);
2078         printf("\n");
2079 #endif  /* KSSL_DEBUG */
2080
2081         if ((p = kssl_skip_confound(enctype, unenc_authent)) == NULL)
2082                 {
2083                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
2084                         "confounded by authenticator.\n");
2085                 krb5rc = KRB5KRB_AP_ERR_BAD_INTEGRITY;
2086                 goto err;
2087                 }
2088         outl -= p - unenc_authent;
2089
2090         if ((auth = (KRB5_AUTHENTBODY *) d2i_KRB5_AUTHENT(NULL, &p,
2091                                                           (long) outl))==NULL)
2092                 {
2093                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
2094                         "Error decoding authenticator body.\n");
2095                 krb5rc = KRB5KRB_AP_ERR_BAD_INTEGRITY;
2096                 goto err;
2097                 }
2098
2099         memset(&tm_time,0,sizeof(struct tm));
2100         if (k_gmtime(auth->ctime, &tm_time)  &&
2101                 ((tr = mktime(&tm_time)) != (time_t)(-1)))
2102                 {
2103                 now  = time(&now);
2104                 tm_l = localtime(&now);         tl = mktime(tm_l);
2105                 tm_g = gmtime(&now);            tg = mktime(tm_g);
2106                 tz_offset = tg - tl;
2107
2108                 *atimep = tr - tz_offset;
2109                 }
2110
2111 #ifdef KSSL_DEBUG
2112         printf("kssl_check_authent: returns %d for client time ", *atimep);
2113         if (auth && auth->ctime && auth->ctime->length && auth->ctime->data)
2114                 printf("%.*s\n", auth->ctime->length, auth->ctime->data);
2115         else    printf("NULL\n");
2116 #endif  /* KSSL_DEBUG */
2117
2118  err:
2119         if (auth)               KRB5_AUTHENT_free((KRB5_AUTHENT *) auth);
2120         if (dec_authent)        KRB5_ENCDATA_free(dec_authent);
2121         if (unenc_authent)      free(unenc_authent);
2122         return krb5rc;
2123         }
2124
2125
2126 /*  Replaces krb5_build_principal_ext(), with varargs length == 2 (svc, host),
2127 **  because I dont't know how to stub varargs.
2128 **  Returns krb5_error_code == ENOMEM on alloc error, otherwise
2129 **  passes back newly constructed principal, which should be freed by caller.
2130 */
2131 krb5_error_code  kssl_build_principal_2(
2132                         /* UPDATE */    krb5_context    context,
2133                         /* OUT    */    krb5_principal  *princ,
2134                         /* IN     */    int rlen,  const char *realm,
2135                         /* IN     */    int slen,  const char *svc,
2136                         /* IN     */    int hlen,  const char *host)
2137         {
2138         krb5_data               *p_data = NULL;
2139         krb5_principal          new_p = NULL;
2140         char                    *new_r = NULL;
2141
2142         if ((p_data = (krb5_data *) calloc(2, sizeof(krb5_data))) == NULL  ||
2143             (new_p = (krb5_principal) calloc(1, sizeof(krb5_principal_data)))
2144                         == NULL)  goto err;
2145         new_p->length = 2;
2146         new_p->data = p_data;
2147
2148         if ((new_r = calloc(1, rlen + 1)) == NULL)  goto err;
2149         memcpy(new_r, realm, rlen);
2150         krb5_princ_set_realm_length(context, new_p, rlen);
2151         krb5_princ_set_realm_data(context, new_p, new_r);
2152
2153         if ((new_p->data[0].data = calloc(1, slen + 1)) == NULL)  goto err;
2154         memcpy(new_p->data[0].data, svc, slen);
2155         new_p->data[0].length = slen;
2156
2157         if ((new_p->data[1].data = calloc(1, hlen + 1)) == NULL)  goto err;
2158         memcpy(new_p->data[1].data, host, hlen);
2159         new_p->data[1].length = hlen;
2160
2161         krb5_princ_type(context, new_p) = KRB5_NT_UNKNOWN;
2162         *princ = new_p;
2163         return 0;
2164
2165  err:
2166         if (new_p  &&  new_p[0].data)   free(new_p[0].data);
2167         if (new_p  &&  new_p[1].data)   free(new_p[1].data);
2168         if (new_p)      free(new_p);
2169         if (new_r)      free(new_r);
2170         return ENOMEM;
2171         }
2172
2173
2174 #else /* !OPENSSL_NO_KRB5 */
2175
2176 #if defined(PEDANTIC) || defined(OPENSSL_SYS_VMS)
2177 static int dummy=(int)&dummy;
2178 #endif
2179
2180 #endif  /* !OPENSSL_NO_KRB5     */
2181