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