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