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 const 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_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_des_ede3_cbc();
 812                                 break;
 813         default:                return 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                 sk_ASN1_GENERALSTRING_num(asn1ticket->sname->namestring) < 2)
1225                 {
1226                 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1227                         "Null field in asn1ticket.\n");
1228                 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1229                 return KRB5KRB_ERR_GENERIC;
1230                 }
1231
1232         if ((new5ticket = (krb5_ticket *) calloc(1, sizeof(krb5_ticket)))==NULL)
1233                 {
1234                 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1235                         "Unable to allocate new krb5_ticket.\n");
1236                 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1237                 return ENOMEM;          /*  or  KRB5KRB_ERR_GENERIC;    */
1238                 }
1239
1240         gstr_svc  = sk_ASN1_GENERALSTRING_value(asn1ticket->sname->namestring, 0);
1241         gstr_host = sk_ASN1_GENERALSTRING_value(asn1ticket->sname->namestring, 1);
1242
1243         if ((krb5rc = kssl_build_principal_2(krb5context,
1244                         &new5ticket->server,
1245                         asn1ticket->realm->length, (char *)asn1ticket->realm->data,
1246                         gstr_svc->length,  (char *)gstr_svc->data,
1247                         gstr_host->length, (char *)gstr_host->data)) != 0)
1248                 {
1249                 free(new5ticket);
1250                 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1251                         "Error building ticket server principal.\n");
1252                 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1253                 return krb5rc;          /*  or  KRB5KRB_ERR_GENERIC;    */
1254                 }
1255
1256         krb5_princ_type(krb5context, new5ticket->server) =
1257                         asn1ticket->sname->nametype->data[0];
1258         new5ticket->enc_part.enctype = asn1ticket->encdata->etype->data[0];
1259         new5ticket->enc_part.kvno = asn1ticket->encdata->kvno->data[0];
1260         new5ticket->enc_part.ciphertext.length =
1261                         asn1ticket->encdata->cipher->length;
1262         if ((new5ticket->enc_part.ciphertext.data =
1263                 calloc(1, asn1ticket->encdata->cipher->length)) == NULL)
1264                 {
1265                 free(new5ticket);
1266                 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1267                         "Error allocating cipher in krb5ticket.\n");
1268                 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1269                 return KRB5KRB_ERR_GENERIC;
1270                 }
1271         else
1272                 {
1273                 memcpy(new5ticket->enc_part.ciphertext.data,
1274                         asn1ticket->encdata->cipher->data,
1275                         asn1ticket->encdata->cipher->length);
1276                 }
1277
1278         *krb5ticket = new5ticket;
1279         return 0;
1280         }
1281
1282
1283 /*      Given krb5 service name in KSSL_CTX *kssl_ctx (typically "kssl"),
1284 **              and krb5 AP_REQ message & message length,
1285 **      Return Kerberos session key and client principle
1286 **              to SSL Server in KSSL_CTX *kssl_ctx.
1287 **
1288 **      19990702        VRS     Started.
1289 */
1290 krb5_error_code
1291 kssl_sget_tkt(  /* UPDATE */    KSSL_CTX                *kssl_ctx,
1292                 /* IN     */    krb5_data               *indata,
1293                 /* OUT    */    krb5_ticket_times       *ttimes,
1294                 /* OUT    */    KSSL_ERR                *kssl_err  )
1295         {
1296         krb5_error_code                 krb5rc = KRB5KRB_ERR_GENERIC;
1297         static krb5_context             krb5context = NULL;
1298         static krb5_auth_context        krb5auth_context = NULL;
1299         krb5_ticket                     *krb5ticket = NULL;
1300         KRB5_TKTBODY                    *asn1ticket = NULL;
1301         unsigned char                   *p;
1302         krb5_keytab                     krb5keytab = NULL;
1303         krb5_keytab_entry               kt_entry;
1304         krb5_principal                  krb5server;
1305         krb5_rcache                     rcache = NULL;
1306
1307         kssl_err_set(kssl_err, 0, "");
1308
1309         if (!kssl_ctx)
1310                 {
1311                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1312                         "No kssl_ctx defined.\n");
1313                 goto err;
1314                 }
1315
1316 #ifdef KSSL_DEBUG
1317         printf("in kssl_sget_tkt(%s)\n", kstring(kssl_ctx->service_name));
1318 #endif  /* KSSL_DEBUG */
1319
1320         if (!krb5context  &&  (krb5rc = krb5_init_context(&krb5context)))
1321                 {
1322                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1323                         "krb5_init_context() fails.\n");
1324                 goto err;
1325                 }
1326         if (krb5auth_context  &&
1327                 (krb5rc = krb5_auth_con_free(krb5context, krb5auth_context)))
1328                 {
1329                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1330                         "krb5_auth_con_free() fails.\n");
1331                 goto err;
1332                 }
1333         else  krb5auth_context = NULL;
1334         if (!krb5auth_context  &&
1335                 (krb5rc = krb5_auth_con_init(krb5context, &krb5auth_context)))
1336                 {
1337                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1338                         "krb5_auth_con_init() fails.\n");
1339                 goto err;
1340                 }
1341
1342
1343         if ((krb5rc = krb5_auth_con_getrcache(krb5context, krb5auth_context,
1344                 &rcache)))
1345                 {
1346                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1347                         "krb5_auth_con_getrcache() fails.\n");
1348                 goto err;
1349                 }
1350
1351         if ((krb5rc = krb5_sname_to_principal(krb5context, NULL,
1352                 (kssl_ctx->service_name)? kssl_ctx->service_name: KRB5SVC,
1353                 KRB5_NT_SRV_HST, &krb5server)) != 0)
1354                 {
1355                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1356                         "krb5_sname_to_principal() fails.\n");
1357                 goto err;
1358                 }
1359
1360         if (rcache == NULL)
1361                 {
1362                 if ((krb5rc = krb5_get_server_rcache(krb5context,
1363                         krb5_princ_component(krb5context, krb5server, 0),
1364                         &rcache)))
1365                         {
1366                         kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1367                                 "krb5_get_server_rcache() fails.\n");
1368                         goto err;
1369                         }
1370                 }
1371
1372         if ((krb5rc = krb5_auth_con_setrcache(krb5context, krb5auth_context, rcache)))
1373                 {
1374                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1375                         "krb5_auth_con_setrcache() fails.\n");
1376                 goto err;
1377                 }
1378
1379
1380         /*      kssl_ctx->keytab_file == NULL ==> use Kerberos default
1381         */
1382         if (kssl_ctx->keytab_file)
1383                 {
1384                 krb5rc = krb5_kt_resolve(krb5context, kssl_ctx->keytab_file,
1385                         &krb5keytab);
1386                 if (krb5rc)
1387                         {
1388                         kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1389                                 "krb5_kt_resolve() fails.\n");
1390                         goto err;
1391                         }
1392                 }
1393         else
1394                 {
1395                 krb5rc = krb5_kt_default(krb5context,&krb5keytab);
1396                 if (krb5rc)
1397                         {
1398                         kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1399                                 "krb5_kt_default() fails.\n");
1400                         goto err;
1401                         }
1402                 }
1403
1404         /*      Actual Kerberos5 krb5_recvauth() has initial conversation here
1405         **      o       check KRB5_SENDAUTH_BADAUTHVERS
1406         **              unless KRB5_RECVAUTH_SKIP_VERSION
1407         **      o       check KRB5_SENDAUTH_BADAPPLVERS
1408         **      o       send "0" msg if all OK
1409         */
1410
1411         /*  20010411 was using AP_REQ instead of true KerberosWrapper
1412         **
1413         **  if ((krb5rc = krb5_rd_req(krb5context, &krb5auth_context,
1414         **                      &krb5in_data, krb5server, krb5keytab,
1415         **                      &ap_option, &krb5ticket)) != 0)  { Error }
1416         */
1417
1418         p = (unsigned char *)indata->data;
1419         if ((asn1ticket = (KRB5_TKTBODY *) d2i_KRB5_TICKET(NULL, &p,
1420                                                 (long) indata->length)) == NULL)
1421                 {
1422                 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1423                         "d2i_KRB5_TICKET() ASN.1 decode failure.\n");
1424                 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1425                 goto err;
1426                 }
1427
1428         /* Was:  krb5rc = krb5_decode_ticket(krb5in_data,&krb5ticket)) != 0) */
1429         if ((krb5rc = kssl_TKT2tkt(krb5context, asn1ticket, &krb5ticket,
1430                                         kssl_err)) != 0)
1431                 {
1432                 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1433                         "Error converting ASN.1 ticket to krb5_ticket.\n");
1434                 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1435                 goto err;
1436                 }
1437
1438         if (! krb5_principal_compare(krb5context, krb5server,
1439                                                   krb5ticket->server))  {
1440                 krb5rc = KRB5_PRINC_NOMATCH;
1441                 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1442                         "server principal != ticket principal\n");
1443                 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1444                 goto err;
1445                 }
1446         if ((krb5rc = krb5_kt_get_entry(krb5context, krb5keytab,
1447                         krb5ticket->server, krb5ticket->enc_part.kvno,
1448                         krb5ticket->enc_part.enctype, &kt_entry)) != 0)  {
1449                 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1450                         "krb5_kt_get_entry() fails with %x.\n", krb5rc);
1451                 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1452                 goto err;
1453                 }
1454         if ((krb5rc = krb5_decrypt_tkt_part(krb5context, &kt_entry.key,
1455                         krb5ticket)) != 0)  {
1456                 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1457                         "krb5_decrypt_tkt_part() failed.\n");
1458                 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1459                 goto err;
1460                 }
1461         else  {
1462                 krb5_kt_free_entry(krb5context, &kt_entry);
1463 #ifdef KSSL_DEBUG
1464                 {
1465                 int i; krb5_address **paddr = krb5ticket->enc_part2->caddrs;
1466                 printf("Decrypted ticket fields:\n");
1467                 printf("\tflags: %X, transit-type: %X",
1468                         krb5ticket->enc_part2->flags,
1469                         krb5ticket->enc_part2->transited.tr_type);
1470                 print_krb5_data("\ttransit-data: ",
1471                         &(krb5ticket->enc_part2->transited.tr_contents));
1472                 printf("\tcaddrs: %p, authdata: %p\n",
1473                         krb5ticket->enc_part2->caddrs,
1474                         krb5ticket->enc_part2->authorization_data);
1475                 if (paddr)
1476                         {
1477                         printf("\tcaddrs:\n");
1478                         for (i=0; paddr[i] != NULL; i++)
1479                                 {
1480                                 krb5_data d;
1481                                 d.length=paddr[i]->length;
1482                                 d.data=paddr[i]->contents;
1483                                 print_krb5_data("\t\tIP: ", &d);
1484                                 }
1485                         }
1486                 printf("\tstart/auth/end times: %d / %d / %d\n",
1487                         krb5ticket->enc_part2->times.starttime,
1488                         krb5ticket->enc_part2->times.authtime,
1489                         krb5ticket->enc_part2->times.endtime);
1490                 }
1491 #endif  /* KSSL_DEBUG */
1492                 }
1493
1494         krb5rc = KRB5_NO_TKT_SUPPLIED;
1495         if (!krb5ticket  ||     !krb5ticket->enc_part2  ||
1496                 !krb5ticket->enc_part2->client  ||
1497                 !krb5ticket->enc_part2->client->data  ||
1498                 !krb5ticket->enc_part2->session)
1499                 {
1500                 kssl_err_set(kssl_err, SSL_R_KRB5_S_BAD_TICKET,
1501                         "bad ticket from krb5_rd_req.\n");
1502                 }
1503         else if (kssl_ctx_setprinc(kssl_ctx, KSSL_CLIENT,
1504                 &krb5ticket->enc_part2->client->realm,
1505                 krb5ticket->enc_part2->client->data))
1506                 {
1507                 kssl_err_set(kssl_err, SSL_R_KRB5_S_BAD_TICKET,
1508                         "kssl_ctx_setprinc() fails.\n");
1509                 }
1510         else if (kssl_ctx_setkey(kssl_ctx, krb5ticket->enc_part2->session))
1511                 {
1512                 kssl_err_set(kssl_err, SSL_R_KRB5_S_BAD_TICKET,
1513                         "kssl_ctx_setkey() fails.\n");
1514                 }
1515         else if (krb5ticket->enc_part2->flags & TKT_FLG_INVALID)
1516                 {
1517                 krb5rc = KRB5KRB_AP_ERR_TKT_INVALID;
1518                 kssl_err_set(kssl_err, SSL_R_KRB5_S_BAD_TICKET,
1519                         "invalid ticket from krb5_rd_req.\n");
1520                 }
1521         else    krb5rc = 0;
1522
1523         kssl_ctx->enctype       = krb5ticket->enc_part.enctype;
1524         ttimes->authtime        = krb5ticket->enc_part2->times.authtime;
1525         ttimes->starttime       = krb5ticket->enc_part2->times.starttime;
1526         ttimes->endtime         = krb5ticket->enc_part2->times.endtime;
1527         ttimes->renew_till      = krb5ticket->enc_part2->times.renew_till;
1528
1529  err:
1530 #ifdef KSSL_DEBUG
1531         kssl_ctx_show(kssl_ctx);
1532 #endif  /* KSSL_DEBUG */
1533
1534         if (asn1ticket)         KRB5_TICKET_free((KRB5_TICKET *) asn1ticket);
1535         if (krb5keytab)         krb5_kt_close(krb5context, krb5keytab);
1536         if (krb5ticket)         krb5_free_ticket(krb5context, krb5ticket);
1537         if (krb5server)         krb5_free_principal(krb5context, krb5server);
1538         return (krb5rc);
1539         }
1540
1541
1542 /*      Allocate & return a new kssl_ctx struct.
1543 */
1544 KSSL_CTX        *
1545 kssl_ctx_new(void)
1546         {
1547         return ((KSSL_CTX *) calloc(1, sizeof(KSSL_CTX)));
1548         }
1549
1550
1551 /*      Frees a kssl_ctx struct and any allocated memory it holds.
1552 **      Returns NULL.
1553 */
1554 KSSL_CTX        *
1555 kssl_ctx_free(KSSL_CTX *kssl_ctx)
1556         {
1557         if (kssl_ctx == NULL)  return kssl_ctx;
1558
1559         if (kssl_ctx->key)              memset(kssl_ctx->key, 0,
1560                                                               kssl_ctx->length);
1561         if (kssl_ctx->key)              free(kssl_ctx->key);
1562         if (kssl_ctx->client_princ)     free(kssl_ctx->client_princ);
1563         if (kssl_ctx->service_host)     free(kssl_ctx->service_host);
1564         if (kssl_ctx->service_name)     free(kssl_ctx->service_name);
1565         if (kssl_ctx->keytab_file)      free(kssl_ctx->keytab_file);
1566
1567         free(kssl_ctx);
1568         return (KSSL_CTX *) NULL;
1569         }
1570
1571
1572 /*      Given a (krb5_data *) entity (and optional realm),
1573 **      set the plain (char *) client_princ or service_host member
1574 **      of the kssl_ctx struct.
1575 */
1576 krb5_error_code
1577 kssl_ctx_setprinc(KSSL_CTX *kssl_ctx, int which,
1578         krb5_data *realm, krb5_data *entity)
1579         {
1580         char    **princ;
1581         int     length;
1582
1583         if (kssl_ctx == NULL  ||  entity == NULL)  return KSSL_CTX_ERR;
1584
1585         switch (which)
1586                 {
1587         case KSSL_CLIENT:       princ = &kssl_ctx->client_princ;        break;
1588         case KSSL_SERVER:       princ = &kssl_ctx->service_host;        break;
1589         default:                return KSSL_CTX_ERR;                    break;
1590                 }
1591         if (*princ)  free(*princ);
1592
1593         length = entity->length + ((realm)? realm->length + 2: 1);
1594         if ((*princ = calloc(1, length)) == NULL)
1595                 return KSSL_CTX_ERR;
1596         else
1597                 {
1598                 strncpy(*princ, entity->data, entity->length);
1599                 (*princ)[entity->length]='\0';
1600                 if (realm)
1601                         {
1602                         strcat (*princ, "@");
1603                         (void) strncat(*princ, realm->data, realm->length);
1604                         (*princ)[entity->length+1+realm->length]='\0';
1605                         }
1606                 }
1607
1608         return KSSL_CTX_OK;
1609         }
1610
1611
1612 /*      Set one of the plain (char *) string members of the kssl_ctx struct.
1613 **      Default values should be:
1614 **              which == KSSL_SERVICE   =>      "khost" (KRB5SVC)
1615 **              which == KSSL_KEYTAB    =>      "/etc/krb5.keytab" (KRB5KEYTAB)
1616 */
1617 krb5_error_code
1618 kssl_ctx_setstring(KSSL_CTX *kssl_ctx, int which, char *text)
1619         {
1620         char    **string;
1621
1622         if (!kssl_ctx)  return KSSL_CTX_ERR;
1623
1624         switch (which)
1625                 {
1626         case KSSL_SERVICE:      string = &kssl_ctx->service_name;       break;
1627         case KSSL_SERVER:       string = &kssl_ctx->service_host;       break;
1628         case KSSL_CLIENT:       string = &kssl_ctx->client_princ;       break;
1629         case KSSL_KEYTAB:       string = &kssl_ctx->keytab_file;        break;
1630         default:                return KSSL_CTX_ERR;                    break;
1631                 }
1632         if (*string)  free(*string);
1633
1634         if (!text)
1635                 {
1636                 *string = '\0';
1637                 return KSSL_CTX_OK;
1638                 }
1639
1640         if ((*string = calloc(1, strlen(text) + 1)) == NULL)
1641                 return KSSL_CTX_ERR;
1642         else
1643                 strcpy(*string, text);
1644
1645         return KSSL_CTX_OK;
1646         }
1647
1648
1649 /*      Copy the Kerberos session key from a (krb5_keyblock *) to a kssl_ctx
1650 **      struct.  Clear kssl_ctx->key if Kerberos session key is NULL.
1651 */
1652 krb5_error_code
1653 kssl_ctx_setkey(KSSL_CTX *kssl_ctx, krb5_keyblock *session)
1654         {
1655         int             length;
1656         krb5_enctype    enctype;
1657         krb5_octet FAR  *contents = NULL;
1658
1659         if (!kssl_ctx)  return KSSL_CTX_ERR;
1660
1661         if (kssl_ctx->key)
1662                 {
1663                 memset(kssl_ctx->key, 0, kssl_ctx->length);
1664                 free(kssl_ctx->key);
1665                 }
1666
1667         if (session)
1668                 {
1669
1670 #ifdef KRB5_HEIMDAL
1671                 length = session->keyvalue->length;
1672                 enctype = session->keytype;
1673                 contents = session->keyvalue->contents;
1674 #else
1675                 length = session->length;
1676                 enctype = session->enctype;
1677                 contents = session->contents;
1678 #endif
1679                 kssl_ctx->enctype = enctype;
1680                 kssl_ctx->length  = length;
1681                 }
1682         else
1683                 {
1684                 kssl_ctx->enctype = ENCTYPE_UNKNOWN;
1685                 kssl_ctx->length  = 0;
1686                 return KSSL_CTX_OK;
1687                 }
1688
1689         if ((kssl_ctx->key =
1690                 (krb5_octet FAR *) calloc(1, kssl_ctx->length)) == NULL)
1691                 {
1692                 kssl_ctx->length  = 0;
1693                 return KSSL_CTX_ERR;
1694                 }
1695         else
1696                 memcpy(kssl_ctx->key, contents, length);
1697
1698         return KSSL_CTX_OK;
1699         }
1700
1701
1702 /*      Display contents of kssl_ctx struct
1703 */
1704 void
1705 kssl_ctx_show(KSSL_CTX *kssl_ctx)
1706         {
1707         int     i;
1708
1709         printf("kssl_ctx: ");
1710         if (kssl_ctx == NULL)
1711                 {
1712                 printf("NULL\n");
1713                 return;
1714                 }
1715         else
1716                 printf("%p\n", kssl_ctx);
1717
1718         printf("\tservice:\t%s\n",
1719                 (kssl_ctx->service_name)? kssl_ctx->service_name: "NULL");
1720         printf("\tclient:\t%s\n",
1721                 (kssl_ctx->client_princ)? kssl_ctx->client_princ: "NULL");
1722         printf("\tserver:\t%s\n",
1723                 (kssl_ctx->service_host)? kssl_ctx->service_host: "NULL");
1724         printf("\tkeytab:\t%s\n",
1725                 (kssl_ctx->keytab_file)? kssl_ctx->keytab_file: "NULL");
1726         printf("\tkey [%d:%d]:\t",
1727                 kssl_ctx->enctype, kssl_ctx->length);
1728
1729         for (i=0; i < kssl_ctx->length  &&  kssl_ctx->key; i++)
1730                 {
1731                 printf("%02x", kssl_ctx->key[i]);
1732                 }
1733         printf("\n");
1734         return;
1735         }
1736
1737     int
1738     kssl_keytab_is_available(KSSL_CTX *kssl_ctx)
1739 {
1740     krb5_context                krb5context = NULL;
1741     krb5_keytab                 krb5keytab = NULL;
1742     krb5_keytab_entry           entry;
1743     krb5_principal              princ = NULL;
1744     krb5_error_code             krb5rc = KRB5KRB_ERR_GENERIC;
1745     int rc = 0;
1746
1747     if ((krb5rc = krb5_init_context(&krb5context)))
1748         return(0);
1749
1750     /*  kssl_ctx->keytab_file == NULL ==> use Kerberos default
1751     */
1752     if (kssl_ctx->keytab_file)
1753     {
1754         krb5rc = krb5_kt_resolve(krb5context, kssl_ctx->keytab_file,
1755                                   &krb5keytab);
1756         if (krb5rc)
1757             goto exit;
1758     }
1759     else
1760     {
1761         krb5rc = krb5_kt_default(krb5context,&krb5keytab);
1762         if (krb5rc)
1763             goto exit;
1764     }
1765
1766     /* the host key we are looking for */
1767     krb5rc = krb5_sname_to_principal(krb5context, NULL,
1768                                      kssl_ctx->service_name ? kssl_ctx->service_name: KRB5SVC,
1769                                      KRB5_NT_SRV_HST, &princ);
1770
1771     krb5rc = krb5_kt_get_entry(krb5context, krb5keytab,
1772                                 princ,
1773                                 0 /* IGNORE_VNO */,
1774                                 0 /* IGNORE_ENCTYPE */,
1775                                 &entry);
1776     if ( krb5rc == KRB5_KT_NOTFOUND ) {
1777         rc = 1;
1778         goto exit;
1779     } else if ( krb5rc )
1780         goto exit;
1781
1782     krb5_kt_free_entry(krb5context, &entry);
1783     rc = 1;
1784
1785   exit:
1786     if (krb5keytab)     krb5_kt_close(krb5context, krb5keytab);
1787     if (princ)          krb5_free_principal(krb5context, princ);
1788     if (krb5context)    krb5_free_context(krb5context);
1789     return(rc);
1790 }
1791
1792 int
1793 kssl_tgt_is_available(KSSL_CTX *kssl_ctx)
1794         {
1795         krb5_error_code         krb5rc = KRB5KRB_ERR_GENERIC;
1796         krb5_context            krb5context = NULL;
1797         krb5_ccache             krb5ccdef = NULL;
1798         krb5_creds              krb5creds, *krb5credsp = NULL;
1799         int                     rc = 0;
1800
1801         memset((char *)&krb5creds, 0, sizeof(krb5creds));
1802
1803         if (!kssl_ctx)
1804             return(0);
1805
1806         if (!kssl_ctx->service_host)
1807             return(0);
1808
1809         if ((krb5rc = krb5_init_context(&krb5context)) != 0)
1810             goto err;
1811
1812         if ((krb5rc = krb5_sname_to_principal(krb5context,
1813                                               kssl_ctx->service_host,
1814                                               (kssl_ctx->service_name)? kssl_ctx->service_name: KRB5SVC,
1815                                               KRB5_NT_SRV_HST, &krb5creds.server)) != 0)
1816             goto err;
1817
1818         if ((krb5rc = krb5_cc_default(krb5context, &krb5ccdef)) != 0)
1819             goto err;
1820
1821         if ((krb5rc = krb5_cc_get_principal(krb5context, krb5ccdef,
1822                                              &krb5creds.client)) != 0)
1823             goto err;
1824
1825         if ((krb5rc = krb5_get_credentials(krb5context, 0, krb5ccdef,
1826                                             &krb5creds, &krb5credsp)) != 0)
1827             goto err;
1828
1829         rc = 1;
1830
1831       err:
1832 #ifdef KSSL_DEBUG
1833         kssl_ctx_show(kssl_ctx);
1834 #endif  /* KSSL_DEBUG */
1835
1836         if (krb5creds.client)   krb5_free_principal(krb5context, krb5creds.client);
1837         if (krb5creds.server)   krb5_free_principal(krb5context, krb5creds.server);
1838         if (krb5context)        krb5_free_context(krb5context);
1839         return(rc);
1840         }
1841
1842 #if !defined(OPENSSL_SYS_WINDOWS) && !defined(OPENSSL_SYS_WIN32)
1843 void kssl_krb5_free_data_contents(krb5_context context, krb5_data *data)
1844         {
1845 #ifdef KRB5_HEIMDAL
1846         data->length = 0;
1847         if (data->data)
1848             free(data->data);
1849 #elif defined(KRB5_MIT_OLD11)
1850         if (data->data)  {
1851                 krb5_xfree(data->data);
1852                 data->data = 0;
1853                 }
1854 #else
1855         krb5_free_data_contents(NULL, data);
1856 #endif
1857         }
1858 #endif /* !OPENSSL_SYS_WINDOWS && !OPENSSL_SYS_WIN32 */
1859
1860
1861 /*  Given pointers to KerberosTime and struct tm structs, convert the
1862 **  KerberosTime string to struct tm.  Note that KerberosTime is a
1863 **  ASN1_GENERALIZEDTIME value, constrained to GMT with no fractional
1864 **  seconds as defined in RFC 1510.
1865 **  Return pointer to the (partially) filled in struct tm on success,
1866 **  return NULL on failure.
1867 */
1868 struct tm       *k_gmtime(ASN1_GENERALIZEDTIME *gtime, struct tm *k_tm)
1869         {
1870         char            c, *p;
1871
1872         if (!k_tm)  return NULL;
1873         if (gtime == NULL  ||  gtime->length < 14)  return NULL;
1874         if (gtime->data == NULL)  return NULL;
1875
1876         p = (char *)&gtime->data[14];
1877
1878         c = *p;  *p = '\0';  p -= 2;  k_tm->tm_sec  = atoi(p);      *(p+2) = c;
1879         c = *p;  *p = '\0';  p -= 2;  k_tm->tm_min  = atoi(p);      *(p+2) = c;
1880         c = *p;  *p = '\0';  p -= 2;  k_tm->tm_hour = atoi(p);      *(p+2) = c;
1881         c = *p;  *p = '\0';  p -= 2;  k_tm->tm_mday = atoi(p);      *(p+2) = c;
1882         c = *p;  *p = '\0';  p -= 2;  k_tm->tm_mon  = atoi(p)-1;    *(p+2) = c;
1883         c = *p;  *p = '\0';  p -= 4;  k_tm->tm_year = atoi(p)-1900; *(p+4) = c;
1884
1885         return k_tm;
1886         }
1887
1888
1889 /*  Helper function for kssl_validate_times().
1890 **  We need context->clockskew, but krb5_context is an opaque struct.
1891 **  So we try to sneek the clockskew out through the replay cache.
1892 **      If that fails just return a likely default (300 seconds).
1893 */
1894 krb5_deltat     get_rc_clockskew(krb5_context context)
1895         {
1896         krb5_rcache     rc;
1897         krb5_deltat     clockskew;
1898
1899         if (krb5_rc_default(context, &rc))  return KSSL_CLOCKSKEW;
1900         if (krb5_rc_initialize(context, rc, 0))  return KSSL_CLOCKSKEW;
1901         if (krb5_rc_get_lifespan(context, rc, &clockskew))  {
1902                 clockskew = KSSL_CLOCKSKEW;
1903                 }
1904         (void) krb5_rc_destroy(context, rc);
1905         return clockskew;
1906         }
1907
1908
1909 /*  kssl_validate_times() combines (and more importantly exposes)
1910 **  the MIT KRB5 internal function krb5_validate_times() and the
1911 **  in_clock_skew() macro.  The authenticator client time is checked
1912 **  to be within clockskew secs of the current time and the current
1913 **  time is checked to be within the ticket start and expire times.
1914 **  Either check may be omitted by supplying a NULL value.
1915 **  Returns 0 for valid times, SSL_R_KRB5* error codes otherwise.
1916 **  See Also: (Kerberos source)/krb5/lib/krb5/krb/valid_times.c
1917 **  20010420 VRS
1918 */
1919 krb5_error_code  kssl_validate_times(   krb5_timestamp atime,
1920                                         krb5_ticket_times *ttimes)
1921         {
1922         krb5_deltat     skew;
1923         krb5_timestamp  start, now;
1924         krb5_error_code rc;
1925         krb5_context    context;
1926
1927         if ((rc = krb5_init_context(&context)))  return SSL_R_KRB5_S_BAD_TICKET;
1928         skew = get_rc_clockskew(context);
1929         if ((rc = krb5_timeofday(context,&now))) return SSL_R_KRB5_S_BAD_TICKET;
1930         krb5_free_context(context);
1931
1932         if (atime  &&  labs(atime - now) >= skew)  return SSL_R_KRB5_S_TKT_SKEW;
1933
1934         if (! ttimes)  return 0;
1935
1936         start = (ttimes->starttime != 0)? ttimes->starttime: ttimes->authtime;
1937         if (start - now > skew)  return SSL_R_KRB5_S_TKT_NYV;
1938         if ((now - ttimes->endtime) > skew)  return SSL_R_KRB5_S_TKT_EXPIRED;
1939
1940 #ifdef KSSL_DEBUG
1941         printf("kssl_validate_times: %d |<-  | %d - %d | < %d  ->| %d\n",
1942                 start, atime, now, skew, ttimes->endtime);
1943 #endif  /* KSSL_DEBUG */
1944
1945         return 0;
1946         }
1947
1948
1949 /*  Decode and decrypt given DER-encoded authenticator, then pass
1950 **  authenticator ctime back in *atimep (or 0 if time unavailable).
1951 **  Returns krb5_error_code and kssl_err on error.  A NULL
1952 **  authenticator (authentp->length == 0) is not considered an error.
1953 **  Note that kssl_check_authent() makes use of the KRB5 session key;
1954 **  you must call kssl_sget_tkt() to get the key before calling this routine.
1955 */
1956 krb5_error_code  kssl_check_authent(
1957                         /* IN     */    KSSL_CTX        *kssl_ctx,
1958                         /* IN     */    krb5_data       *authentp,
1959                         /* OUT    */    krb5_timestamp  *atimep,
1960                         /* OUT    */    KSSL_ERR        *kssl_err  )
1961         {
1962         krb5_error_code         krb5rc = 0;
1963         KRB5_ENCDATA            *dec_authent = NULL;
1964         KRB5_AUTHENTBODY        *auth = NULL;
1965         krb5_enctype            enctype;
1966         EVP_CIPHER_CTX          ciph_ctx;
1967         const EVP_CIPHER        *enc = NULL;
1968         unsigned char           iv[EVP_MAX_IV_LENGTH];
1969         unsigned char           *p, *unenc_authent;
1970         int                     padl, outl, unencbufsize;
1971         struct tm               tm_time, *tm_l, *tm_g;
1972         time_t                  now, tl, tg, tr, tz_offset;
1973
1974         *atimep = 0;
1975         kssl_err_set(kssl_err, 0, "");
1976
1977 #ifndef KRB5CHECKAUTH
1978         authentp = NULL;
1979 #else
1980 #if     KRB5CHECKAUTH == 0
1981         authentp = NULL;
1982 #endif
1983 #endif  /* KRB5CHECKAUTH */
1984
1985         if (authentp == NULL  ||  authentp->length == 0)  return 0;
1986
1987 #ifdef KSSL_DEBUG
1988         {
1989         unsigned int ui;
1990         printf("kssl_check_authent: authenticator[%d]:\n",authentp->length);
1991         p = authentp->data;
1992         for (ui=0; ui < authentp->length; ui++)  printf("%02x ",p[ui]);
1993         printf("\n");
1994         }
1995 #endif  /* KSSL_DEBUG */
1996
1997         unencbufsize = 2 * authentp->length;
1998         if ((unenc_authent = calloc(1, unencbufsize)) == NULL)
1999                 {
2000                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
2001                         "Unable to allocate authenticator buffer.\n");
2002                 krb5rc = KRB5KRB_ERR_GENERIC;
2003                 goto err;
2004                 }
2005
2006         p = (unsigned char *)authentp->data;
2007         if ((dec_authent = d2i_KRB5_ENCDATA(NULL, &p,
2008                                         (long) authentp->length)) == NULL)
2009                 {
2010                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
2011                         "Error decoding authenticator.\n");
2012                 krb5rc = KRB5KRB_AP_ERR_BAD_INTEGRITY;
2013                 goto err;
2014                 }
2015
2016         enctype = dec_authent->etype->data[0];  /* should = kssl_ctx->enctype */
2017 #if !defined(KRB5_MIT_OLD11)
2018             switch ( enctype ) {
2019             case ENCTYPE_DES3_CBC_SHA1:         /*    EVP_des_ede3_cbc();  */
2020             case ENCTYPE_DES3_CBC_SHA:
2021             case ENCTYPE_DES3_CBC_RAW:
2022                 krb5rc = 0;                     /* Skip, can't handle derived keys */
2023                 goto err;
2024             }
2025 #endif
2026         enc = kssl_map_enc(enctype);
2027         memset(iv, 0, EVP_MAX_IV_LENGTH);       /* per RFC 1510 */
2028
2029         if (enc == NULL)
2030                 {
2031                 /*  Disable kssl_check_authent for ENCTYPE_DES3_CBC_SHA1.
2032                 **  This enctype indicates the authenticator was encrypted
2033                 **  using key-usage derived keys which openssl cannot decrypt.
2034                 */
2035                 goto err;
2036                 }
2037         if (!EVP_DecryptInit_ex(&ciph_ctx, enc, NULL, kssl_ctx->key, iv))
2038                 {
2039                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
2040                         "EVP_DecryptInit_ex error decrypting authenticator.\n");
2041                 krb5rc = KRB5KRB_AP_ERR_BAD_INTEGRITY;
2042                 goto err;
2043                 }
2044         if (!EVP_DecryptUpdate(&ciph_ctx, unenc_authent, &outl,
2045                         dec_authent->cipher->data, dec_authent->cipher->length))
2046                 {
2047                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
2048                         "EVP_DecryptUpdate error decrypting authenticator.\n");
2049                 krb5rc = KRB5KRB_AP_ERR_BAD_INTEGRITY;
2050                 goto err;
2051                 }
2052         if (outl > unencbufsize)
2053                 {
2054                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
2055                         "Buffer overflow decrypting authenticator.\n");
2056                 krb5rc = KRB5KRB_AP_ERR_BAD_INTEGRITY;
2057                 goto err;
2058                 }
2059         if (!EVP_DecryptFinal_ex(&ciph_ctx, &(unenc_authent[outl]), &padl))
2060                 {
2061                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
2062                         "EVP_DecryptFinal_ex error decrypting authenticator.\n");
2063                 krb5rc = KRB5KRB_AP_ERR_BAD_INTEGRITY;
2064                 goto err;
2065                 }
2066         outl += padl;
2067         if (outl > unencbufsize)
2068                 {
2069                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
2070                         "Buffer overflow decrypting authenticator.\n");
2071                 krb5rc = KRB5KRB_AP_ERR_BAD_INTEGRITY;
2072                 goto err;
2073                 }
2074         EVP_CIPHER_CTX_cleanup(&ciph_ctx);
2075
2076 #ifdef KSSL_DEBUG
2077         printf("kssl_check_authent: decrypted authenticator[%d] =\n", outl);
2078         for (padl=0; padl < outl; padl++) printf("%02x ",unenc_authent[padl]);
2079         printf("\n");
2080 #endif  /* KSSL_DEBUG */
2081
2082         if ((p = kssl_skip_confound(enctype, unenc_authent)) == NULL)
2083                 {
2084                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
2085                         "confounded by authenticator.\n");
2086                 krb5rc = KRB5KRB_AP_ERR_BAD_INTEGRITY;
2087                 goto err;
2088                 }
2089         outl -= p - unenc_authent;
2090
2091         if ((auth = (KRB5_AUTHENTBODY *) d2i_KRB5_AUTHENT(NULL, &p,
2092                                                           (long) outl))==NULL)
2093                 {
2094                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
2095                         "Error decoding authenticator body.\n");
2096                 krb5rc = KRB5KRB_AP_ERR_BAD_INTEGRITY;
2097                 goto err;
2098                 }
2099
2100         memset(&tm_time,0,sizeof(struct tm));
2101         if (k_gmtime(auth->ctime, &tm_time)  &&
2102                 ((tr = mktime(&tm_time)) != (time_t)(-1)))
2103                 {
2104                 now  = time(&now);
2105                 tm_l = localtime(&now);         tl = mktime(tm_l);
2106                 tm_g = gmtime(&now);            tg = mktime(tm_g);
2107                 tz_offset = tg - tl;
2108
2109                 *atimep = tr - tz_offset;
2110                 }
2111
2112 #ifdef KSSL_DEBUG
2113         printf("kssl_check_authent: returns %d for client time ", *atimep);
2114         if (auth && auth->ctime && auth->ctime->length && auth->ctime->data)
2115                 printf("%.*s\n", auth->ctime->length, auth->ctime->data);
2116         else    printf("NULL\n");
2117 #endif  /* KSSL_DEBUG */
2118
2119  err:
2120         if (auth)               KRB5_AUTHENT_free((KRB5_AUTHENT *) auth);
2121         if (dec_authent)        KRB5_ENCDATA_free(dec_authent);
2122         if (unenc_authent)      free(unenc_authent);
2123         return krb5rc;
2124         }
2125
2126
2127 /*  Replaces krb5_build_principal_ext(), with varargs length == 2 (svc, host),
2128 **  because I dont't know how to stub varargs.
2129 **  Returns krb5_error_code == ENOMEM on alloc error, otherwise
2130 **  passes back newly constructed principal, which should be freed by caller.
2131 */
2132 krb5_error_code  kssl_build_principal_2(
2133                         /* UPDATE */    krb5_context    context,
2134                         /* OUT    */    krb5_principal  *princ,
2135                         /* IN     */    int rlen,  const char *realm,
2136                         /* IN     */    int slen,  const char *svc,
2137                         /* IN     */    int hlen,  const char *host)
2138         {
2139         krb5_data               *p_data = NULL;
2140         krb5_principal          new_p = NULL;
2141         char                    *new_r = NULL;
2142
2143         if ((p_data = (krb5_data *) calloc(2, sizeof(krb5_data))) == NULL  ||
2144             (new_p = (krb5_principal) calloc(1, sizeof(krb5_principal_data)))
2145                         == NULL)  goto err;
2146         new_p->length = 2;
2147         new_p->data = p_data;
2148
2149         if ((new_r = calloc(1, rlen + 1)) == NULL)  goto err;
2150         memcpy(new_r, realm, rlen);
2151         krb5_princ_set_realm_length(context, new_p, rlen);
2152         krb5_princ_set_realm_data(context, new_p, new_r);
2153
2154         if ((new_p->data[0].data = calloc(1, slen + 1)) == NULL)  goto err;
2155         memcpy(new_p->data[0].data, svc, slen);
2156         new_p->data[0].length = slen;
2157
2158         if ((new_p->data[1].data = calloc(1, hlen + 1)) == NULL)  goto err;
2159         memcpy(new_p->data[1].data, host, hlen);
2160         new_p->data[1].length = hlen;
2161
2162         krb5_princ_type(context, new_p) = KRB5_NT_UNKNOWN;
2163         *princ = new_p;
2164         return 0;
2165
2166  err:
2167         if (new_p  &&  new_p[0].data)   free(new_p[0].data);
2168         if (new_p  &&  new_p[1].data)   free(new_p[1].data);
2169         if (new_p)      free(new_p);
2170         if (new_r)      free(new_r);
2171         return ENOMEM;
2172         }
2173
2174
2175 #else /* !OPENSSL_NO_KRB5 */
2176
2177 #if defined(PEDANTIC) || defined(OPENSSL_SYS_VMS)
2178 static int dummy=(int)&dummy;
2179 #endif
2180
2181 #endif  /* !OPENSSL_NO_KRB5     */
2182