crypto/openssl/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 500 /* glibc2 needs this to declare strptime() */
  72 #include <time.h>
  73 #if 0 /* experimental */
  74 #undef _XOPEN_SOURCE /* To avoid clashes with anything else... */
  75 #endif
  76 #include <string.h>
  77
  78 #define KRB5_PRIVATE    1
  79
  80 #include <openssl/ssl.h>
  81 #include <openssl/evp.h>
  82 #include <openssl/objects.h>
  83 #include <openssl/krb5_asn.h>
  84
  85 #ifndef OPENSSL_NO_KRB5
  86
  87 #ifndef ENOMEM
  88 #define ENOMEM KRB5KRB_ERR_GENERIC
  89 #endif
  90
  91 /*
  92  * When OpenSSL is built on Windows, we do not want to require that
  93  * the Kerberos DLLs be available in order for the OpenSSL DLLs to
  94  * work.  Therefore, all Kerberos routines are loaded at run time
  95  * and we do not link to a .LIB file.
  96  */
  97
  98 #if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_WIN32)
  99 /*
 100  * The purpose of the following pre-processor statements is to provide
 101  * compatibility with different releases of MIT Kerberos for Windows.
 102  * All versions up to 1.2 used macros.  But macros do not allow for
 103  * a binary compatible interface for DLLs.  Therefore, all macros are
 104  * being replaced by function calls.  The following code will allow
 105  * an OpenSSL DLL built on Windows to work whether or not the macro
 106  * or function form of the routines are utilized.
 107  */
 108 #ifdef  krb5_cc_get_principal
 109 #define NO_DEF_KRB5_CCACHE
 110 #undef  krb5_cc_get_principal
 111 #endif
 112 #define krb5_cc_get_principal    kssl_krb5_cc_get_principal
 113
 114 #define krb5_free_data_contents  kssl_krb5_free_data_contents
 115 #define krb5_free_context        kssl_krb5_free_context
 116 #define krb5_auth_con_free       kssl_krb5_auth_con_free
 117 #define krb5_free_principal      kssl_krb5_free_principal
 118 #define krb5_mk_req_extended     kssl_krb5_mk_req_extended
 119 #define krb5_get_credentials     kssl_krb5_get_credentials
 120 #define krb5_cc_default          kssl_krb5_cc_default
 121 #define krb5_sname_to_principal  kssl_krb5_sname_to_principal
 122 #define krb5_init_context        kssl_krb5_init_context
 123 #define krb5_free_ticket         kssl_krb5_free_ticket
 124 #define krb5_rd_req              kssl_krb5_rd_req
 125 #define krb5_kt_default          kssl_krb5_kt_default
 126 #define krb5_kt_resolve          kssl_krb5_kt_resolve
 127 /* macros in mit 1.2.2 and earlier; functions in mit 1.2.3 and greater */
 128 #ifndef krb5_kt_close
 129 #define krb5_kt_close            kssl_krb5_kt_close
 130 #endif /* krb5_kt_close */
 131 #ifndef krb5_kt_get_entry
 132 #define krb5_kt_get_entry        kssl_krb5_kt_get_entry
 133 #endif /* krb5_kt_get_entry */
 134 #define krb5_auth_con_init       kssl_krb5_auth_con_init
 135
 136 #define krb5_principal_compare   kssl_krb5_principal_compare
 137 #define krb5_decrypt_tkt_part    kssl_krb5_decrypt_tkt_part
 138 #define krb5_timeofday           kssl_krb5_timeofday
 139 #define krb5_rc_default           kssl_krb5_rc_default
 140
 141 #ifdef krb5_rc_initialize
 142 #undef krb5_rc_initialize
 143 #endif
 144 #define krb5_rc_initialize   kssl_krb5_rc_initialize
 145
 146 #ifdef krb5_rc_get_lifespan
 147 #undef krb5_rc_get_lifespan
 148 #endif
 149 #define krb5_rc_get_lifespan kssl_krb5_rc_get_lifespan
 150
 151 #ifdef krb5_rc_destroy
 152 #undef krb5_rc_destroy
 153 #endif
 154 #define krb5_rc_destroy      kssl_krb5_rc_destroy
 155
 156 #define valid_cksumtype      kssl_valid_cksumtype
 157 #define krb5_checksum_size   kssl_krb5_checksum_size
 158 #define krb5_kt_free_entry   kssl_krb5_kt_free_entry
 159 #define krb5_auth_con_setrcache  kssl_krb5_auth_con_setrcache
 160 #define krb5_auth_con_getrcache  kssl_krb5_auth_con_getrcache
 161 #define krb5_get_server_rcache   kssl_krb5_get_server_rcache
 162
 163 /* Prototypes for built in stubs */
 164 void kssl_krb5_free_data_contents(krb5_context, krb5_data *);
 165 void kssl_krb5_free_principal(krb5_context, krb5_principal );
 166 krb5_error_code kssl_krb5_kt_resolve(krb5_context,
 167                                      krb5_const char *,
 168                                      krb5_keytab *);
 169 krb5_error_code kssl_krb5_kt_default(krb5_context,
 170                                      krb5_keytab *);
 171 krb5_error_code kssl_krb5_free_ticket(krb5_context, krb5_ticket *);
 172 krb5_error_code kssl_krb5_rd_req(krb5_context, krb5_auth_context *,
 173                                  krb5_const krb5_data *,
 174                                  krb5_const_principal, krb5_keytab,
 175                                  krb5_flags *,krb5_ticket **);
 176
 177 krb5_boolean kssl_krb5_principal_compare(krb5_context, krb5_const_principal,
 178                                          krb5_const_principal);
 179 krb5_error_code kssl_krb5_mk_req_extended(krb5_context,
 180                                           krb5_auth_context  *,
 181                                           krb5_const krb5_flags,
 182                                           krb5_data  *,
 183                                           krb5_creds  *,
 184                                           krb5_data  * );
 185 krb5_error_code kssl_krb5_init_context(krb5_context *);
 186 void kssl_krb5_free_context(krb5_context);
 187 krb5_error_code kssl_krb5_cc_default(krb5_context,krb5_ccache  *);
 188 krb5_error_code kssl_krb5_sname_to_principal(krb5_context,
 189                                              krb5_const char  *,
 190                                              krb5_const char  *,
 191                                              krb5_int32,
 192                                              krb5_principal  *);
 193 krb5_error_code kssl_krb5_get_credentials(krb5_context,
 194                                           krb5_const krb5_flags,
 195                                           krb5_ccache,
 196                                           krb5_creds  *,
 197                                           krb5_creds  *  *);
 198 krb5_error_code kssl_krb5_auth_con_init(krb5_context,
 199                                         krb5_auth_context  *);
 200 krb5_error_code kssl_krb5_cc_get_principal(krb5_context context,
 201                                            krb5_ccache cache,
 202                                            krb5_principal *principal);
 203 krb5_error_code kssl_krb5_auth_con_free(krb5_context,krb5_auth_context);
 204 size_t kssl_krb5_checksum_size(krb5_context context,krb5_cksumtype ctype);
 205 krb5_boolean kssl_valid_cksumtype(krb5_cksumtype ctype);
 206 krb5_error_code krb5_kt_free_entry(krb5_context,krb5_keytab_entry FAR * );
 207 krb5_error_code kssl_krb5_auth_con_setrcache(krb5_context,
 208                                              krb5_auth_context,
 209                                              krb5_rcache);
 210 krb5_error_code kssl_krb5_get_server_rcache(krb5_context,
 211                                             krb5_const krb5_data *,
 212                                             krb5_rcache *);
 213 krb5_error_code kssl_krb5_auth_con_getrcache(krb5_context,
 214                                              krb5_auth_context,
 215                                              krb5_rcache *);
 216
 217 /* Function pointers (almost all Kerberos functions are _stdcall) */
 218 static void (_stdcall *p_krb5_free_data_contents)(krb5_context, krb5_data *)
 219         =NULL;
 220 static void (_stdcall *p_krb5_free_principal)(krb5_context, krb5_principal )
 221         =NULL;
 222 static krb5_error_code(_stdcall *p_krb5_kt_resolve)
 223                         (krb5_context, krb5_const char *, krb5_keytab *)=NULL;
 224 static krb5_error_code (_stdcall *p_krb5_kt_default)(krb5_context,
 225                                                      krb5_keytab *)=NULL;
 226 static krb5_error_code (_stdcall *p_krb5_free_ticket)(krb5_context,
 227                                                       krb5_ticket *)=NULL;
 228 static krb5_error_code (_stdcall *p_krb5_rd_req)(krb5_context,
 229                                                  krb5_auth_context *,
 230                                                  krb5_const krb5_data *,
 231                                                  krb5_const_principal,
 232                                                  krb5_keytab, krb5_flags *,
 233                                                  krb5_ticket **)=NULL;
 234 static krb5_error_code (_stdcall *p_krb5_mk_req_extended)
 235                         (krb5_context, krb5_auth_context *,
 236                          krb5_const krb5_flags, krb5_data *, krb5_creds *,
 237                          krb5_data * )=NULL;
 238 static krb5_error_code (_stdcall *p_krb5_init_context)(krb5_context *)=NULL;
 239 static void (_stdcall *p_krb5_free_context)(krb5_context)=NULL;
 240 static krb5_error_code (_stdcall *p_krb5_cc_default)(krb5_context,
 241                                                      krb5_ccache  *)=NULL;
 242 static krb5_error_code (_stdcall *p_krb5_sname_to_principal)
 243                         (krb5_context, krb5_const char *, krb5_const char *,
 244                          krb5_int32, krb5_principal *)=NULL;
 245 static krb5_error_code (_stdcall *p_krb5_get_credentials)
 246                         (krb5_context, krb5_const krb5_flags, krb5_ccache,
 247                          krb5_creds *, krb5_creds **)=NULL;
 248 static krb5_error_code (_stdcall *p_krb5_auth_con_init)
 249                         (krb5_context, krb5_auth_context *)=NULL;
 250 static krb5_error_code (_stdcall *p_krb5_cc_get_principal)
 251                         (krb5_context context, krb5_ccache cache,
 252                          krb5_principal *principal)=NULL;
 253 static krb5_error_code (_stdcall *p_krb5_auth_con_free)
 254                         (krb5_context, krb5_auth_context)=NULL;
 255 static krb5_error_code (_stdcall *p_krb5_decrypt_tkt_part)
 256                         (krb5_context, krb5_const krb5_keyblock *,
 257                                            krb5_ticket *)=NULL;
 258 static krb5_error_code (_stdcall *p_krb5_timeofday)
 259                         (krb5_context context, krb5_int32 *timeret)=NULL;
 260 static krb5_error_code (_stdcall *p_krb5_rc_default)
 261                         (krb5_context context, krb5_rcache *rc)=NULL;
 262 static krb5_error_code (_stdcall *p_krb5_rc_initialize)
 263                         (krb5_context context, krb5_rcache rc,
 264                                      krb5_deltat lifespan)=NULL;
 265 static krb5_error_code (_stdcall *p_krb5_rc_get_lifespan)
 266                         (krb5_context context, krb5_rcache rc,
 267                                        krb5_deltat *lifespan)=NULL;
 268 static krb5_error_code (_stdcall *p_krb5_rc_destroy)
 269                         (krb5_context context, krb5_rcache rc)=NULL;
 270 static krb5_boolean (_stdcall *p_krb5_principal_compare)
 271                      (krb5_context, krb5_const_principal, krb5_const_principal)=NULL;
 272 static size_t (_stdcall *p_krb5_checksum_size)(krb5_context context,krb5_cksumtype ctype)=NULL;
 273 static krb5_boolean (_stdcall *p_valid_cksumtype)(krb5_cksumtype ctype)=NULL;
 274 static krb5_error_code (_stdcall *p_krb5_kt_free_entry)
 275                         (krb5_context,krb5_keytab_entry * )=NULL;
 276 static krb5_error_code (_stdcall * p_krb5_auth_con_setrcache)(krb5_context,
 277                                                                krb5_auth_context,
 278                                                                krb5_rcache)=NULL;
 279 static krb5_error_code (_stdcall * p_krb5_get_server_rcache)(krb5_context,
 280                                                               krb5_const krb5_data *,
 281                                                               krb5_rcache *)=NULL;
 282 static krb5_error_code (* p_krb5_auth_con_getrcache)(krb5_context,
 283                                                       krb5_auth_context,
 284                                                       krb5_rcache *)=NULL;
 285 static krb5_error_code (_stdcall * p_krb5_kt_close)(krb5_context context,
 286                                                     krb5_keytab keytab)=NULL;
 287 static krb5_error_code (_stdcall * p_krb5_kt_get_entry)(krb5_context context,
 288                                                         krb5_keytab keytab,
 289                        krb5_const_principal principal, krb5_kvno vno,
 290                        krb5_enctype enctype, krb5_keytab_entry *entry)=NULL;
 291 static int krb5_loaded = 0;     /* only attempt to initialize func ptrs once */
 292
 293 /* Function to Load the Kerberos 5 DLL and initialize function pointers */
 294 void
 295 load_krb5_dll(void)
 296         {
 297         HANDLE hKRB5_32;
 298
 299         krb5_loaded++;
 300         hKRB5_32 = LoadLibrary(TEXT("KRB5_32"));
 301         if (!hKRB5_32)
 302                 return;
 303
 304         (FARPROC) p_krb5_free_data_contents =
 305                 GetProcAddress( hKRB5_32, "krb5_free_data_contents" );
 306         (FARPROC) p_krb5_free_context =
 307                 GetProcAddress( hKRB5_32, "krb5_free_context" );
 308         (FARPROC) p_krb5_auth_con_free =
 309                 GetProcAddress( hKRB5_32, "krb5_auth_con_free" );
 310         (FARPROC) p_krb5_free_principal =
 311                 GetProcAddress( hKRB5_32, "krb5_free_principal" );
 312         (FARPROC) p_krb5_mk_req_extended =
 313                 GetProcAddress( hKRB5_32, "krb5_mk_req_extended" );
 314         (FARPROC) p_krb5_get_credentials =
 315                 GetProcAddress( hKRB5_32, "krb5_get_credentials" );
 316         (FARPROC) p_krb5_cc_get_principal =
 317                 GetProcAddress( hKRB5_32, "krb5_cc_get_principal" );
 318         (FARPROC) p_krb5_cc_default =
 319                 GetProcAddress( hKRB5_32, "krb5_cc_default" );
 320         (FARPROC) p_krb5_sname_to_principal =
 321                 GetProcAddress( hKRB5_32, "krb5_sname_to_principal" );
 322         (FARPROC) p_krb5_init_context =
 323                 GetProcAddress( hKRB5_32, "krb5_init_context" );
 324         (FARPROC) p_krb5_free_ticket =
 325                 GetProcAddress( hKRB5_32, "krb5_free_ticket" );
 326         (FARPROC) p_krb5_rd_req =
 327                 GetProcAddress( hKRB5_32, "krb5_rd_req" );
 328         (FARPROC) p_krb5_principal_compare =
 329                 GetProcAddress( hKRB5_32, "krb5_principal_compare" );
 330         (FARPROC) p_krb5_decrypt_tkt_part =
 331                 GetProcAddress( hKRB5_32, "krb5_decrypt_tkt_part" );
 332         (FARPROC) p_krb5_timeofday =
 333                 GetProcAddress( hKRB5_32, "krb5_timeofday" );
 334         (FARPROC) p_krb5_rc_default =
 335                 GetProcAddress( hKRB5_32, "krb5_rc_default" );
 336         (FARPROC) p_krb5_rc_initialize =
 337                 GetProcAddress( hKRB5_32, "krb5_rc_initialize" );
 338         (FARPROC) p_krb5_rc_get_lifespan =
 339                 GetProcAddress( hKRB5_32, "krb5_rc_get_lifespan" );
 340         (FARPROC) p_krb5_rc_destroy =
 341                 GetProcAddress( hKRB5_32, "krb5_rc_destroy" );
 342         (FARPROC) p_krb5_kt_default =
 343                 GetProcAddress( hKRB5_32, "krb5_kt_default" );
 344         (FARPROC) p_krb5_kt_resolve =
 345                 GetProcAddress( hKRB5_32, "krb5_kt_resolve" );
 346         (FARPROC) p_krb5_auth_con_init =
 347                 GetProcAddress( hKRB5_32, "krb5_auth_con_init" );
 348         (FARPROC) p_valid_cksumtype =
 349                 GetProcAddress( hKRB5_32, "valid_cksumtype" );
 350         (FARPROC) p_krb5_checksum_size =
 351                 GetProcAddress( hKRB5_32, "krb5_checksum_size" );
 352         (FARPROC) p_krb5_kt_free_entry =
 353                 GetProcAddress( hKRB5_32, "krb5_kt_free_entry" );
 354         (FARPROC) p_krb5_auth_con_setrcache =
 355                 GetProcAddress( hKRB5_32, "krb5_auth_con_setrcache" );
 356         (FARPROC) p_krb5_get_server_rcache =
 357                 GetProcAddress( hKRB5_32, "krb5_get_server_rcache" );
 358         (FARPROC) p_krb5_auth_con_getrcache =
 359                 GetProcAddress( hKRB5_32, "krb5_auth_con_getrcache" );
 360         (FARPROC) p_krb5_kt_close =
 361                 GetProcAddress( hKRB5_32, "krb5_kt_close" );
 362         (FARPROC) p_krb5_kt_get_entry =
 363                 GetProcAddress( hKRB5_32, "krb5_kt_get_entry" );
 364         }
 365
 366 /* Stubs for each function to be dynamicly loaded */
 367 void
 368 kssl_krb5_free_data_contents(krb5_context CO, krb5_data  * data)
 369         {
 370         if (!krb5_loaded)
 371                 load_krb5_dll();
 372
 373         if ( p_krb5_free_data_contents )
 374                 p_krb5_free_data_contents(CO,data);
 375         }
 376
 377 krb5_error_code
 378 kssl_krb5_mk_req_extended (krb5_context CO,
 379                           krb5_auth_context  * pACO,
 380                           krb5_const krb5_flags F,
 381                           krb5_data  * pD1,
 382                           krb5_creds  * pC,
 383                           krb5_data  * pD2)
 384         {
 385         if (!krb5_loaded)
 386                 load_krb5_dll();
 387
 388         if ( p_krb5_mk_req_extended )
 389                 return(p_krb5_mk_req_extended(CO,pACO,F,pD1,pC,pD2));
 390         else
 391                 return KRB5KRB_ERR_GENERIC;
 392         }
 393 krb5_error_code
 394 kssl_krb5_auth_con_init(krb5_context CO,
 395                        krb5_auth_context  * pACO)
 396         {
 397         if (!krb5_loaded)
 398                 load_krb5_dll();
 399
 400         if ( p_krb5_auth_con_init )
 401                 return(p_krb5_auth_con_init(CO,pACO));
 402         else
 403                 return KRB5KRB_ERR_GENERIC;
 404         }
 405 krb5_error_code
 406 kssl_krb5_auth_con_free (krb5_context CO,
 407                         krb5_auth_context ACO)
 408         {
 409         if (!krb5_loaded)
 410                 load_krb5_dll();
 411
 412         if ( p_krb5_auth_con_free )
 413                 return(p_krb5_auth_con_free(CO,ACO));
 414         else
 415                 return KRB5KRB_ERR_GENERIC;
 416         }
 417 krb5_error_code
 418 kssl_krb5_get_credentials(krb5_context CO,
 419                          krb5_const krb5_flags F,
 420                          krb5_ccache CC,
 421                          krb5_creds  * pCR,
 422                          krb5_creds  ** ppCR)
 423         {
 424         if (!krb5_loaded)
 425                 load_krb5_dll();
 426
 427         if ( p_krb5_get_credentials )
 428                 return(p_krb5_get_credentials(CO,F,CC,pCR,ppCR));
 429         else
 430                 return KRB5KRB_ERR_GENERIC;
 431         }
 432 krb5_error_code
 433 kssl_krb5_sname_to_principal(krb5_context CO,
 434                             krb5_const char  * pC1,
 435                             krb5_const char  * pC2,
 436                             krb5_int32 I,
 437                             krb5_principal  * pPR)
 438         {
 439         if (!krb5_loaded)
 440                 load_krb5_dll();
 441
 442         if ( p_krb5_sname_to_principal )
 443                 return(p_krb5_sname_to_principal(CO,pC1,pC2,I,pPR));
 444         else
 445                 return KRB5KRB_ERR_GENERIC;
 446         }
 447
 448 krb5_error_code
 449 kssl_krb5_cc_default(krb5_context CO,
 450                     krb5_ccache  * pCC)
 451         {
 452         if (!krb5_loaded)
 453                 load_krb5_dll();
 454
 455         if ( p_krb5_cc_default )
 456                 return(p_krb5_cc_default(CO,pCC));
 457         else
 458                 return KRB5KRB_ERR_GENERIC;
 459         }
 460
 461 krb5_error_code
 462 kssl_krb5_init_context(krb5_context * pCO)
 463         {
 464         if (!krb5_loaded)
 465                 load_krb5_dll();
 466
 467         if ( p_krb5_init_context )
 468                 return(p_krb5_init_context(pCO));
 469         else
 470                 return KRB5KRB_ERR_GENERIC;
 471         }
 472
 473 void
 474 kssl_krb5_free_context(krb5_context CO)
 475         {
 476         if (!krb5_loaded)
 477                 load_krb5_dll();
 478
 479         if ( p_krb5_free_context )
 480                 p_krb5_free_context(CO);
 481         }
 482
 483 void
 484 kssl_krb5_free_principal(krb5_context c, krb5_principal p)
 485         {
 486         if (!krb5_loaded)
 487                 load_krb5_dll();
 488
 489         if ( p_krb5_free_principal )
 490                 p_krb5_free_principal(c,p);
 491         }
 492
 493 krb5_error_code
 494 kssl_krb5_kt_resolve(krb5_context con,
 495                     krb5_const char * sz,
 496                     krb5_keytab * kt)
 497         {
 498         if (!krb5_loaded)
 499                 load_krb5_dll();
 500
 501         if ( p_krb5_kt_resolve )
 502                 return(p_krb5_kt_resolve(con,sz,kt));
 503         else
 504                 return KRB5KRB_ERR_GENERIC;
 505         }
 506
 507 krb5_error_code
 508 kssl_krb5_kt_default(krb5_context con,
 509                     krb5_keytab * kt)
 510         {
 511         if (!krb5_loaded)
 512                 load_krb5_dll();
 513
 514         if ( p_krb5_kt_default )
 515                 return(p_krb5_kt_default(con,kt));
 516         else
 517                 return KRB5KRB_ERR_GENERIC;
 518         }
 519
 520 krb5_error_code
 521 kssl_krb5_free_ticket(krb5_context con,
 522                      krb5_ticket * kt)
 523         {
 524         if (!krb5_loaded)
 525                 load_krb5_dll();
 526
 527         if ( p_krb5_free_ticket )
 528                 return(p_krb5_free_ticket(con,kt));
 529         else
 530                 return KRB5KRB_ERR_GENERIC;
 531         }
 532
 533 krb5_error_code
 534 kssl_krb5_rd_req(krb5_context con, krb5_auth_context * pacon,
 535                 krb5_const krb5_data * data,
 536                 krb5_const_principal princ, krb5_keytab keytab,
 537                 krb5_flags * flags, krb5_ticket ** pptkt)
 538         {
 539         if (!krb5_loaded)
 540                 load_krb5_dll();
 541
 542         if ( p_krb5_rd_req )
 543                 return(p_krb5_rd_req(con,pacon,data,princ,keytab,flags,pptkt));
 544         else
 545                 return KRB5KRB_ERR_GENERIC;
 546         }
 547
 548 krb5_boolean
 549 krb5_principal_compare(krb5_context con, krb5_const_principal princ1,
 550                 krb5_const_principal princ2)
 551         {
 552         if (!krb5_loaded)
 553                 load_krb5_dll();
 554
 555         if ( p_krb5_principal_compare )
 556                 return(p_krb5_principal_compare(con,princ1,princ2));
 557         else
 558                 return KRB5KRB_ERR_GENERIC;
 559         }
 560
 561 krb5_error_code
 562 krb5_decrypt_tkt_part(krb5_context con, krb5_const krb5_keyblock *keys,
 563                 krb5_ticket *ticket)
 564         {
 565         if (!krb5_loaded)
 566                 load_krb5_dll();
 567
 568         if ( p_krb5_decrypt_tkt_part )
 569                 return(p_krb5_decrypt_tkt_part(con,keys,ticket));
 570         else
 571                 return KRB5KRB_ERR_GENERIC;
 572         }
 573
 574 krb5_error_code
 575 krb5_timeofday(krb5_context con, krb5_int32 *timeret)
 576         {
 577         if (!krb5_loaded)
 578                 load_krb5_dll();
 579
 580         if ( p_krb5_timeofday )
 581                 return(p_krb5_timeofday(con,timeret));
 582         else
 583                 return KRB5KRB_ERR_GENERIC;
 584         }
 585
 586 krb5_error_code
 587 krb5_rc_default(krb5_context con, krb5_rcache *rc)
 588         {
 589         if (!krb5_loaded)
 590                 load_krb5_dll();
 591
 592         if ( p_krb5_rc_default )
 593                 return(p_krb5_rc_default(con,rc));
 594         else
 595                 return KRB5KRB_ERR_GENERIC;
 596         }
 597
 598 krb5_error_code
 599 krb5_rc_initialize(krb5_context con, krb5_rcache rc, krb5_deltat lifespan)
 600         {
 601         if (!krb5_loaded)
 602                 load_krb5_dll();
 603
 604         if ( p_krb5_rc_initialize )
 605                 return(p_krb5_rc_initialize(con, rc, lifespan));
 606         else
 607                 return KRB5KRB_ERR_GENERIC;
 608         }
 609
 610 krb5_error_code
 611 krb5_rc_get_lifespan(krb5_context con, krb5_rcache rc, krb5_deltat *lifespanp)
 612         {
 613         if (!krb5_loaded)
 614                 load_krb5_dll();
 615
 616         if ( p_krb5_rc_get_lifespan )
 617                 return(p_krb5_rc_get_lifespan(con, rc, lifespanp));
 618         else
 619                 return KRB5KRB_ERR_GENERIC;
 620         }
 621
 622 krb5_error_code
 623 krb5_rc_destroy(krb5_context con, krb5_rcache rc)
 624         {
 625         if (!krb5_loaded)
 626                 load_krb5_dll();
 627
 628         if ( p_krb5_rc_destroy )
 629                 return(p_krb5_rc_destroy(con, rc));
 630         else
 631                 return KRB5KRB_ERR_GENERIC;
 632         }
 633
 634 size_t
 635 krb5_checksum_size(krb5_context context,krb5_cksumtype ctype)
 636         {
 637         if (!krb5_loaded)
 638                 load_krb5_dll();
 639
 640         if ( p_krb5_checksum_size )
 641                 return(p_krb5_checksum_size(context, ctype));
 642         else
 643                 return KRB5KRB_ERR_GENERIC;
 644         }
 645
 646 krb5_boolean
 647 valid_cksumtype(krb5_cksumtype ctype)
 648         {
 649         if (!krb5_loaded)
 650                 load_krb5_dll();
 651
 652         if ( p_valid_cksumtype )
 653                 return(p_valid_cksumtype(ctype));
 654         else
 655                 return KRB5KRB_ERR_GENERIC;
 656         }
 657
 658 krb5_error_code
 659 krb5_kt_free_entry(krb5_context con,krb5_keytab_entry * entry)
 660         {
 661         if (!krb5_loaded)
 662                 load_krb5_dll();
 663
 664         if ( p_krb5_kt_free_entry )
 665                 return(p_krb5_kt_free_entry(con,entry));
 666         else
 667                 return KRB5KRB_ERR_GENERIC;
 668         }
 669
 670 /* Structure definitions  */
 671 #ifndef NO_DEF_KRB5_CCACHE
 672 #ifndef krb5_x
 673 #define krb5_x(ptr,args) ((ptr)?((*(ptr)) args):(abort(),1))
 674 #define krb5_xc(ptr,args) ((ptr)?((*(ptr)) args):(abort(),(char*)0))
 675 #endif
 676
 677 typedef krb5_pointer    krb5_cc_cursor; /* cursor for sequential lookup */
 678
 679 typedef struct _krb5_ccache
 680         {
 681         krb5_magic magic;
 682         struct _krb5_cc_ops FAR *ops;
 683         krb5_pointer data;
 684         } *krb5_ccache;
 685
 686 typedef struct _krb5_cc_ops
 687         {
 688         krb5_magic magic;
 689         char  *prefix;
 690         char  * (KRB5_CALLCONV *get_name)
 691                 (krb5_context, krb5_ccache);
 692         krb5_error_code (KRB5_CALLCONV *resolve)
 693                 (krb5_context, krb5_ccache  *, const char  *);
 694         krb5_error_code (KRB5_CALLCONV *gen_new)
 695                 (krb5_context, krb5_ccache  *);
 696         krb5_error_code (KRB5_CALLCONV *init)
 697                 (krb5_context, krb5_ccache, krb5_principal);
 698         krb5_error_code (KRB5_CALLCONV *destroy)
 699                 (krb5_context, krb5_ccache);
 700         krb5_error_code (KRB5_CALLCONV *close)
 701                 (krb5_context, krb5_ccache);
 702         krb5_error_code (KRB5_CALLCONV *store)
 703                 (krb5_context, krb5_ccache, krb5_creds  *);
 704         krb5_error_code (KRB5_CALLCONV *retrieve)
 705                 (krb5_context, krb5_ccache,
 706                 krb5_flags, krb5_creds  *, krb5_creds  *);
 707         krb5_error_code (KRB5_CALLCONV *get_princ)
 708                 (krb5_context, krb5_ccache, krb5_principal  *);
 709         krb5_error_code (KRB5_CALLCONV *get_first)
 710                 (krb5_context, krb5_ccache, krb5_cc_cursor  *);
 711         krb5_error_code (KRB5_CALLCONV *get_next)
 712                 (krb5_context, krb5_ccache,
 713                 krb5_cc_cursor  *, krb5_creds  *);
 714         krb5_error_code (KRB5_CALLCONV *end_get)
 715                 (krb5_context, krb5_ccache, krb5_cc_cursor  *);
 716         krb5_error_code (KRB5_CALLCONV *remove_cred)
 717                 (krb5_context, krb5_ccache,
 718                 krb5_flags, krb5_creds  *);
 719         krb5_error_code (KRB5_CALLCONV *set_flags)
 720                 (krb5_context, krb5_ccache, krb5_flags);
 721         } krb5_cc_ops;
 722 #endif /* NO_DEF_KRB5_CCACHE */
 723
 724 krb5_error_code
 725 kssl_krb5_cc_get_principal
 726     (krb5_context context, krb5_ccache cache,
 727       krb5_principal *principal)
 728         {
 729         if ( p_krb5_cc_get_principal )
 730                 return(p_krb5_cc_get_principal(context,cache,principal));
 731         else
 732                 return(krb5_x
 733                         ((cache)->ops->get_princ,(context, cache, principal)));
 734         }
 735
 736 krb5_error_code
 737 kssl_krb5_auth_con_setrcache(krb5_context con, krb5_auth_context acon,
 738                              krb5_rcache rcache)
 739         {
 740         if ( p_krb5_auth_con_setrcache )
 741                  return(p_krb5_auth_con_setrcache(con,acon,rcache));
 742         else
 743                  return KRB5KRB_ERR_GENERIC;
 744         }
 745
 746 krb5_error_code
 747 kssl_krb5_get_server_rcache(krb5_context con, krb5_const krb5_data * data,
 748                             krb5_rcache * rcache)
 749         {
 750         if ( p_krb5_get_server_rcache )
 751                 return(p_krb5_get_server_rcache(con,data,rcache));
 752         else
 753                 return KRB5KRB_ERR_GENERIC;
 754         }
 755
 756 krb5_error_code
 757 kssl_krb5_auth_con_getrcache(krb5_context con, krb5_auth_context acon,
 758                              krb5_rcache * prcache)
 759         {
 760         if ( p_krb5_auth_con_getrcache )
 761                 return(p_krb5_auth_con_getrcache(con,acon, prcache));
 762         else
 763                 return KRB5KRB_ERR_GENERIC;
 764         }
 765
 766 krb5_error_code
 767 kssl_krb5_kt_close(krb5_context context, krb5_keytab keytab)
 768         {
 769         if ( p_krb5_kt_close )
 770                 return(p_krb5_kt_close(context,keytab));
 771         else
 772                 return KRB5KRB_ERR_GENERIC;
 773         }
 774
 775 krb5_error_code
 776 kssl_krb5_kt_get_entry(krb5_context context, krb5_keytab keytab,
 777                        krb5_const_principal principal, krb5_kvno vno,
 778                        krb5_enctype enctype, krb5_keytab_entry *entry)
 779         {
 780         if ( p_krb5_kt_get_entry )
 781                 return(p_krb5_kt_get_entry(context,keytab,principal,vno,enctype,entry));
 782         else
 783                 return KRB5KRB_ERR_GENERIC;
 784         }
 785 #endif  /* OPENSSL_SYS_WINDOWS || OPENSSL_SYS_WIN32 */
 786
 787
 788 /* memory allocation functions for non-temporary storage
 789  * (e.g. stuff that gets saved into the kssl context) */
 790 static void* kssl_calloc(size_t nmemb, size_t size)
 791 {
 792         void* p;
 793
 794         p=OPENSSL_malloc(nmemb*size);
 795         if (p){
 796                 memset(p, 0, nmemb*size);
 797         }
 798         return p;
 799 }
 800
 801 #define kssl_malloc(size) OPENSSL_malloc((size))
 802 #define kssl_realloc(ptr, size) OPENSSL_realloc(ptr, size)
 803 #define kssl_free(ptr) OPENSSL_free((ptr))
 804
 805
 806 char
 807 *kstring(char *string)
 808         {
 809         static char     *null = "[NULL]";
 810
 811         return ((string == NULL)? null: string);
 812         }
 813
 814 /*      Given KRB5 enctype (basically DES or 3DES),
 815 **      return closest match openssl EVP_ encryption algorithm.
 816 **      Return NULL for unknown or problematic (krb5_dk_encrypt) enctypes.
 817 **      Assume ENCTYPE_*_RAW (krb5_raw_encrypt) are OK.
 818 */
 819 const EVP_CIPHER *
 820 kssl_map_enc(krb5_enctype enctype)
 821         {
 822         switch (enctype)
 823                 {
 824         case ENCTYPE_DES_HMAC_SHA1:             /*    EVP_des_cbc();       */
 825         case ENCTYPE_DES_CBC_CRC:
 826         case ENCTYPE_DES_CBC_MD4:
 827         case ENCTYPE_DES_CBC_MD5:
 828         case ENCTYPE_DES_CBC_RAW:
 829                                 return EVP_des_cbc();
 830                                 break;
 831         case ENCTYPE_DES3_CBC_SHA1:             /*    EVP_des_ede3_cbc();  */
 832         case ENCTYPE_DES3_CBC_SHA:
 833         case ENCTYPE_DES3_CBC_RAW:
 834                                 return EVP_des_ede3_cbc();
 835                                 break;
 836         default:                return NULL;
 837                                 break;
 838                 }
 839         }
 840
 841
 842 /*      Return true:1 if p "looks like" the start of the real authenticator
 843 **      described in kssl_skip_confound() below.  The ASN.1 pattern is
 844 **      "62 xx 30 yy" (APPLICATION-2, SEQUENCE), where xx-yy =~ 2, and
 845 **      xx and yy are possibly multi-byte length fields.
 846 */
 847 int     kssl_test_confound(unsigned char *p)
 848         {
 849         int     len = 2;
 850         int     xx = 0, yy = 0;
 851
 852         if (*p++ != 0x62)  return 0;
 853         if (*p > 0x82)  return 0;
 854         switch(*p)  {
 855                 case 0x82:  p++;          xx = (*p++ << 8);  xx += *p++;  break;
 856                 case 0x81:  p++;          xx =  *p++;  break;
 857                 case 0x80:  return 0;
 858                 default:    xx = *p++;  break;
 859                 }
 860         if (*p++ != 0x30)  return 0;
 861         if (*p > 0x82)  return 0;
 862         switch(*p)  {
 863                 case 0x82:  p++; len+=2;  yy = (*p++ << 8);  yy += *p++;  break;
 864                 case 0x81:  p++; len++;   yy =  *p++;  break;
 865                 case 0x80:  return 0;
 866                 default:    yy = *p++;  break;
 867                 }
 868
 869         return (xx - len == yy)? 1: 0;
 870         }
 871
 872 /*      Allocate, fill, and return cksumlens array of checksum lengths.
 873 **      This array holds just the unique elements from the krb5_cksumarray[].
 874 **      array[n] == 0 signals end of data.
 875 **
 876 **      The krb5_cksumarray[] was an internal variable that has since been
 877 **      replaced by a more general method for storing the data.  It should
 878 **      not be used.  Instead we use real API calls and make a guess for
 879 **      what the highest assigned CKSUMTYPE_ constant is.  As of 1.2.2
 880 **      it is 0x000c (CKSUMTYPE_HMAC_SHA1_DES3).  So we will use 0x0010.
 881 */
 882 size_t  *populate_cksumlens(void)
 883         {
 884         int             i, j, n;
 885         static size_t   *cklens = NULL;
 886
 887 #ifdef KRB5_MIT_OLD11
 888         n = krb5_max_cksum;
 889 #else
 890         n = 0x0010;
 891 #endif  /* KRB5_MIT_OLD11 */
 892
 893 #ifdef KRB5CHECKAUTH
 894         if (!cklens && !(cklens = (size_t *) calloc(sizeof(int),n+1)))  return NULL;
 895
 896         for (i=0; i < n; i++)  {
 897                 if (!valid_cksumtype(i))  continue;     /*  array has holes  */
 898                 for (j=0; j < n; j++)  {
 899                         if (cklens[j] == 0)  {
 900                                 cklens[j] = krb5_checksum_size(NULL,i);
 901                                 break;          /*  krb5 elem was new: add   */
 902                                 }
 903                         if (cklens[j] == krb5_checksum_size(NULL,i))  {
 904                                 break;          /*  ignore duplicate elements */
 905                                 }
 906                         }
 907                 }
 908 #endif  /* KRB5CHECKAUTH */
 909
 910         return cklens;
 911         }
 912
 913 /*      Return pointer to start of real authenticator within authenticator, or
 914 **      return NULL on error.
 915 **      Decrypted authenticator looks like this:
 916 **              [0 or 8 byte confounder] [4-24 byte checksum] [real authent'r]
 917 **      This hackery wouldn't be necessary if MIT KRB5 1.0.6 had the
 918 **      krb5_auth_con_getcksumtype() function advertised in its krb5.h.
 919 */
 920 unsigned char   *kssl_skip_confound(krb5_enctype etype, unsigned char *a)
 921         {
 922         int             i, conlen;
 923         size_t          cklen;
 924         static size_t   *cksumlens = NULL;
 925         unsigned char   *test_auth;
 926
 927         conlen = (etype)? 8: 0;
 928
 929         if (!cksumlens  &&  !(cksumlens = populate_cksumlens()))  return NULL;
 930         for (i=0; (cklen = cksumlens[i]) != 0; i++)
 931                 {
 932                 test_auth = a + conlen + cklen;
 933                 if (kssl_test_confound(test_auth))  return test_auth;
 934                 }
 935
 936         return NULL;
 937         }
 938
 939
 940 /*      Set kssl_err error info when reason text is a simple string
 941 **              kssl_err = struct { int reason; char text[KSSL_ERR_MAX+1]; }
 942 */
 943 void
 944 kssl_err_set(KSSL_ERR *kssl_err, int reason, char *text)
 945         {
 946         if (kssl_err == NULL)  return;
 947
 948         kssl_err->reason = reason;
 949         BIO_snprintf(kssl_err->text, KSSL_ERR_MAX, text);
 950         return;
 951         }
 952
 953
 954 /*      Display contents of krb5_data struct, for debugging
 955 */
 956 void
 957 print_krb5_data(char *label, krb5_data *kdata)
 958         {
 959         int i;
 960
 961         printf("%s[%d] ", label, kdata->length);
 962         for (i=0; i < (int)kdata->length; i++)
 963                 {
 964                 if (0 &&  isprint((int) kdata->data[i]))
 965                         printf( "%c ",  kdata->data[i]);
 966                 else
 967                         printf( "%02x ", (unsigned char) kdata->data[i]);
 968                 }
 969         printf("\n");
 970         }
 971
 972
 973 /*      Display contents of krb5_authdata struct, for debugging
 974 */
 975 void
 976 print_krb5_authdata(char *label, krb5_authdata **adata)
 977         {
 978         if (adata == NULL)
 979                 {
 980                 printf("%s, authdata==0\n", label);
 981                 return;
 982                 }
 983         printf("%s [%p]\n", label, (void *)adata);
 984 #if 0
 985         {
 986         int     i;
 987         printf("%s[at%d:%d] ", label, adata->ad_type, adata->length);
 988         for (i=0; i < adata->length; i++)
 989                 {
 990                 printf((isprint(adata->contents[i]))? "%c ": "%02x",
 991                         adata->contents[i]);
 992                 }
 993         printf("\n");
 994         }
 995 #endif
 996         }
 997
 998
 999 /*      Display contents of krb5_keyblock struct, for debugging
1000 */
1001 void
1002 print_krb5_keyblock(char *label, krb5_keyblock *keyblk)
1003         {
1004         int i;
1005
1006         if (keyblk == NULL)
1007                 {
1008                 printf("%s, keyblk==0\n", label);
1009                 return;
1010                 }
1011 #ifdef KRB5_HEIMDAL
1012         printf("%s\n\t[et%d:%d]: ", label, keyblk->keytype,
1013                                            keyblk->keyvalue->length);
1014         for (i=0; i < (int)keyblk->keyvalue->length; i++)
1015                 {
1016                 printf("%02x",(unsigned char *)(keyblk->keyvalue->contents)[i]);
1017                 }
1018         printf("\n");
1019 #else
1020         printf("%s\n\t[et%d:%d]: ", label, keyblk->enctype, keyblk->length);
1021         for (i=0; i < (int)keyblk->length; i++)
1022                 {
1023                 printf("%02x",keyblk->contents[i]);
1024                 }
1025         printf("\n");
1026 #endif
1027         }
1028
1029
1030 /*      Display contents of krb5_principal_data struct, for debugging
1031 **      (krb5_principal is typedef'd == krb5_principal_data *)
1032 */
1033 void
1034 print_krb5_princ(char *label, krb5_principal_data *princ)
1035         {
1036         int i, ui, uj;
1037
1038         printf("%s principal Realm: ", label);
1039         if (princ == NULL)  return;
1040         for (ui=0; ui < (int)princ->realm.length; ui++)  putchar(princ->realm.data[ui]);
1041         printf(" (nametype %d) has %d strings:\n", princ->type,princ->length);
1042         for (i=0; i < (int)princ->length; i++)
1043                 {
1044                 printf("\t%d [%d]: ", i, princ->data[i].length);
1045                 for (uj=0; uj < (int)princ->data[i].length; uj++)  {
1046                         putchar(princ->data[i].data[uj]);
1047                         }
1048                 printf("\n");
1049                 }
1050         return;
1051         }
1052
1053
1054 /*      Given krb5 service (typically "kssl") and hostname in kssl_ctx,
1055 **      Return encrypted Kerberos ticket for service @ hostname.
1056 **      If authenp is non-NULL, also return encrypted authenticator,
1057 **      whose data should be freed by caller.
1058 **      (Originally was: Create Kerberos AP_REQ message for SSL Client.)
1059 **
1060 **      19990628        VRS     Started; Returns Kerberos AP_REQ message.
1061 **      20010409        VRS     Modified for RFC2712; Returns enc tkt.
1062 **      20010606        VRS     May also return optional authenticator.
1063 */
1064 krb5_error_code
1065 kssl_cget_tkt(  /* UPDATE */    KSSL_CTX *kssl_ctx,
1066                 /* OUT    */    krb5_data **enc_ticketp,
1067                 /* UPDATE */    krb5_data *authenp,
1068                 /* OUT    */    KSSL_ERR *kssl_err)
1069         {
1070         krb5_error_code         krb5rc = KRB5KRB_ERR_GENERIC;
1071         krb5_context            krb5context = NULL;
1072         krb5_auth_context       krb5auth_context = NULL;
1073         krb5_ccache             krb5ccdef = NULL;
1074         krb5_creds              krb5creds, *krb5credsp = NULL;
1075         krb5_data               krb5_app_req;
1076
1077         kssl_err_set(kssl_err, 0, "");
1078         memset((char *)&krb5creds, 0, sizeof(krb5creds));
1079
1080         if (!kssl_ctx)
1081                 {
1082                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1083                         "No kssl_ctx defined.\n");
1084                 goto err;
1085                 }
1086         else if (!kssl_ctx->service_host)
1087                 {
1088                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1089                         "kssl_ctx service_host undefined.\n");
1090                 goto err;
1091                 }
1092
1093         if ((krb5rc = krb5_init_context(&krb5context)) != 0)
1094                 {
1095                 BIO_snprintf(kssl_err->text,KSSL_ERR_MAX,
1096                         "krb5_init_context() fails: %d\n", krb5rc);
1097                 kssl_err->reason = SSL_R_KRB5_C_INIT;
1098                 goto err;
1099                 }
1100
1101         if ((krb5rc = krb5_sname_to_principal(krb5context,
1102                 kssl_ctx->service_host,
1103                 (kssl_ctx->service_name)? kssl_ctx->service_name: KRB5SVC,
1104                 KRB5_NT_SRV_HST, &krb5creds.server)) != 0)
1105                 {
1106                 BIO_snprintf(kssl_err->text,KSSL_ERR_MAX,
1107                         "krb5_sname_to_principal() fails for %s/%s\n",
1108                         kssl_ctx->service_host,
1109                         (kssl_ctx->service_name)? kssl_ctx->service_name:
1110                                                   KRB5SVC);
1111                 kssl_err->reason = SSL_R_KRB5_C_INIT;
1112                 goto err;
1113                 }
1114
1115         if ((krb5rc = krb5_cc_default(krb5context, &krb5ccdef)) != 0)
1116                 {
1117                 kssl_err_set(kssl_err, SSL_R_KRB5_C_CC_PRINC,
1118                         "krb5_cc_default fails.\n");
1119                 goto err;
1120                 }
1121
1122         if ((krb5rc = krb5_cc_get_principal(krb5context, krb5ccdef,
1123                 &krb5creds.client)) != 0)
1124                 {
1125                 kssl_err_set(kssl_err, SSL_R_KRB5_C_CC_PRINC,
1126                         "krb5_cc_get_principal() fails.\n");
1127                 goto err;
1128                 }
1129
1130         if ((krb5rc = krb5_get_credentials(krb5context, 0, krb5ccdef,
1131                 &krb5creds, &krb5credsp)) != 0)
1132                 {
1133                 kssl_err_set(kssl_err, SSL_R_KRB5_C_GET_CRED,
1134                         "krb5_get_credentials() fails.\n");
1135                 goto err;
1136                 }
1137
1138         *enc_ticketp = &krb5credsp->ticket;
1139 #ifdef KRB5_HEIMDAL
1140         kssl_ctx->enctype = krb5credsp->session.keytype;
1141 #else
1142         kssl_ctx->enctype = krb5credsp->keyblock.enctype;
1143 #endif
1144
1145         krb5rc = KRB5KRB_ERR_GENERIC;
1146         /*      caller should free data of krb5_app_req  */
1147         /*  20010406 VRS deleted for real KerberosWrapper
1148         **  20010605 VRS reinstated to offer Authenticator to KerberosWrapper
1149         */
1150         krb5_app_req.length = 0;
1151         if (authenp)
1152                 {
1153                 krb5_data       krb5in_data;
1154                 const unsigned char     *p;
1155                 long            arlen;
1156                 KRB5_APREQBODY  *ap_req;
1157
1158                 authenp->length = 0;
1159                 krb5in_data.data = NULL;
1160                 krb5in_data.length = 0;
1161                 if ((krb5rc = krb5_mk_req_extended(krb5context,
1162                         &krb5auth_context, 0, &krb5in_data, krb5credsp,
1163                         &krb5_app_req)) != 0)
1164                         {
1165                         kssl_err_set(kssl_err, SSL_R_KRB5_C_MK_REQ,
1166                                 "krb5_mk_req_extended() fails.\n");
1167                         goto err;
1168                         }
1169
1170                 arlen = krb5_app_req.length;
1171                 p = (unsigned char *)krb5_app_req.data;
1172                 ap_req = (KRB5_APREQBODY *) d2i_KRB5_APREQ(NULL, &p, arlen);
1173                 if (ap_req)
1174                         {
1175                         authenp->length = i2d_KRB5_ENCDATA(
1176                                         ap_req->authenticator, NULL);
1177                         if (authenp->length  &&
1178                                 (authenp->data = malloc(authenp->length)))
1179                                 {
1180                                 unsigned char   *adp = (unsigned char *)authenp->data;
1181                                 authenp->length = i2d_KRB5_ENCDATA(
1182                                                 ap_req->authenticator, &adp);
1183                                 }
1184                         }
1185
1186                 if (ap_req)  KRB5_APREQ_free((KRB5_APREQ *) ap_req);
1187                 if (krb5_app_req.length)
1188                         kssl_krb5_free_data_contents(krb5context,&krb5_app_req);
1189                 }
1190 #ifdef KRB5_HEIMDAL
1191         if (kssl_ctx_setkey(kssl_ctx, &krb5credsp->session))
1192                 {
1193                 kssl_err_set(kssl_err, SSL_R_KRB5_C_INIT,
1194                         "kssl_ctx_setkey() fails.\n");
1195                 }
1196 #else
1197         if (kssl_ctx_setkey(kssl_ctx, &krb5credsp->keyblock))
1198                 {
1199                 kssl_err_set(kssl_err, SSL_R_KRB5_C_INIT,
1200                         "kssl_ctx_setkey() fails.\n");
1201                 }
1202 #endif
1203         else    krb5rc = 0;
1204
1205  err:
1206 #ifdef KSSL_DEBUG
1207         kssl_ctx_show(kssl_ctx);
1208 #endif  /* KSSL_DEBUG */
1209
1210         if (krb5creds.client)   krb5_free_principal(krb5context,
1211                                                         krb5creds.client);
1212         if (krb5creds.server)   krb5_free_principal(krb5context,
1213                                                         krb5creds.server);
1214         if (krb5auth_context)   krb5_auth_con_free(krb5context,
1215                                                         krb5auth_context);
1216         if (krb5context)        krb5_free_context(krb5context);
1217         return (krb5rc);
1218         }
1219
1220
1221 /*  Given d2i_-decoded asn1ticket, allocate and return a new krb5_ticket.
1222 **  Return Kerberos error code and kssl_err struct on error.
1223 **  Allocates krb5_ticket and krb5_principal; caller should free these.
1224 **
1225 **      20010410        VRS     Implemented krb5_decode_ticket() as
1226 **                              old_krb5_decode_ticket(). Missing from MIT1.0.6.
1227 **      20010615        VRS     Re-cast as openssl/asn1 d2i_*() functions.
1228 **                              Re-used some of the old krb5_decode_ticket()
1229 **                              code here.  This tkt should alloc/free just
1230 **                              like the real thing.
1231 */
1232 krb5_error_code
1233 kssl_TKT2tkt(   /* IN     */    krb5_context    krb5context,
1234                 /* IN     */    KRB5_TKTBODY    *asn1ticket,
1235                 /* OUT    */    krb5_ticket     **krb5ticket,
1236                 /* OUT    */    KSSL_ERR *kssl_err  )
1237         {
1238         krb5_error_code                 krb5rc = KRB5KRB_ERR_GENERIC;
1239         krb5_ticket                     *new5ticket = NULL;
1240         ASN1_GENERALSTRING              *gstr_svc, *gstr_host;
1241
1242         *krb5ticket = NULL;
1243
1244         if (asn1ticket == NULL  ||  asn1ticket->realm == NULL  ||
1245                 asn1ticket->sname == NULL  ||
1246                 sk_ASN1_GENERALSTRING_num(asn1ticket->sname->namestring) < 2)
1247                 {
1248                 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1249                         "Null field in asn1ticket.\n");
1250                 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1251                 return KRB5KRB_ERR_GENERIC;
1252                 }
1253
1254         if ((new5ticket = (krb5_ticket *) calloc(1, sizeof(krb5_ticket)))==NULL)
1255                 {
1256                 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1257                         "Unable to allocate new krb5_ticket.\n");
1258                 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1259                 return ENOMEM;          /*  or  KRB5KRB_ERR_GENERIC;    */
1260                 }
1261
1262         gstr_svc  = sk_ASN1_GENERALSTRING_value(asn1ticket->sname->namestring, 0);
1263         gstr_host = sk_ASN1_GENERALSTRING_value(asn1ticket->sname->namestring, 1);
1264
1265         if ((krb5rc = kssl_build_principal_2(krb5context,
1266                         &new5ticket->server,
1267                         asn1ticket->realm->length, (char *)asn1ticket->realm->data,
1268                         gstr_svc->length,  (char *)gstr_svc->data,
1269                         gstr_host->length, (char *)gstr_host->data)) != 0)
1270                 {
1271                 free(new5ticket);
1272                 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1273                         "Error building ticket server principal.\n");
1274                 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1275                 return krb5rc;          /*  or  KRB5KRB_ERR_GENERIC;    */
1276                 }
1277
1278         krb5_princ_type(krb5context, new5ticket->server) =
1279                         asn1ticket->sname->nametype->data[0];
1280         new5ticket->enc_part.enctype = asn1ticket->encdata->etype->data[0];
1281         new5ticket->enc_part.kvno = asn1ticket->encdata->kvno->data[0];
1282         new5ticket->enc_part.ciphertext.length =
1283                         asn1ticket->encdata->cipher->length;
1284         if ((new5ticket->enc_part.ciphertext.data =
1285                 calloc(1, asn1ticket->encdata->cipher->length)) == NULL)
1286                 {
1287                 free(new5ticket);
1288                 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1289                         "Error allocating cipher in krb5ticket.\n");
1290                 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1291                 return KRB5KRB_ERR_GENERIC;
1292                 }
1293         else
1294                 {
1295                 memcpy(new5ticket->enc_part.ciphertext.data,
1296                         asn1ticket->encdata->cipher->data,
1297                         asn1ticket->encdata->cipher->length);
1298                 }
1299
1300         *krb5ticket = new5ticket;
1301         return 0;
1302         }
1303
1304
1305 /*      Given krb5 service name in KSSL_CTX *kssl_ctx (typically "kssl"),
1306 **              and krb5 AP_REQ message & message length,
1307 **      Return Kerberos session key and client principle
1308 **              to SSL Server in KSSL_CTX *kssl_ctx.
1309 **
1310 **      19990702        VRS     Started.
1311 */
1312 krb5_error_code
1313 kssl_sget_tkt(  /* UPDATE */    KSSL_CTX                *kssl_ctx,
1314                 /* IN     */    krb5_data               *indata,
1315                 /* OUT    */    krb5_ticket_times       *ttimes,
1316                 /* OUT    */    KSSL_ERR                *kssl_err  )
1317         {
1318         krb5_error_code                 krb5rc = KRB5KRB_ERR_GENERIC;
1319         static krb5_context             krb5context = NULL;
1320         static krb5_auth_context        krb5auth_context = NULL;
1321         krb5_ticket                     *krb5ticket = NULL;
1322         KRB5_TKTBODY                    *asn1ticket = NULL;
1323         const unsigned char             *p;
1324         krb5_keytab                     krb5keytab = NULL;
1325         krb5_keytab_entry               kt_entry;
1326         krb5_principal                  krb5server;
1327         krb5_rcache                     rcache = NULL;
1328
1329         kssl_err_set(kssl_err, 0, "");
1330
1331         if (!kssl_ctx)
1332                 {
1333                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1334                         "No kssl_ctx defined.\n");
1335                 goto err;
1336                 }
1337
1338 #ifdef KSSL_DEBUG
1339         printf("in kssl_sget_tkt(%s)\n", kstring(kssl_ctx->service_name));
1340 #endif  /* KSSL_DEBUG */
1341
1342         if (!krb5context  &&  (krb5rc = krb5_init_context(&krb5context)))
1343                 {
1344                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1345                         "krb5_init_context() fails.\n");
1346                 goto err;
1347                 }
1348         if (krb5auth_context  &&
1349                 (krb5rc = krb5_auth_con_free(krb5context, krb5auth_context)))
1350                 {
1351                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1352                         "krb5_auth_con_free() fails.\n");
1353                 goto err;
1354                 }
1355         else  krb5auth_context = NULL;
1356         if (!krb5auth_context  &&
1357                 (krb5rc = krb5_auth_con_init(krb5context, &krb5auth_context)))
1358                 {
1359                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1360                         "krb5_auth_con_init() fails.\n");
1361                 goto err;
1362                 }
1363
1364
1365         if ((krb5rc = krb5_auth_con_getrcache(krb5context, krb5auth_context,
1366                 &rcache)))
1367                 {
1368                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1369                         "krb5_auth_con_getrcache() fails.\n");
1370                 goto err;
1371                 }
1372
1373         if ((krb5rc = krb5_sname_to_principal(krb5context, NULL,
1374                 (kssl_ctx->service_name)? kssl_ctx->service_name: KRB5SVC,
1375                 KRB5_NT_SRV_HST, &krb5server)) != 0)
1376                 {
1377                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1378                         "krb5_sname_to_principal() fails.\n");
1379                 goto err;
1380                 }
1381
1382         if (rcache == NULL)
1383                 {
1384                 if ((krb5rc = krb5_get_server_rcache(krb5context,
1385                         krb5_princ_component(krb5context, krb5server, 0),
1386                         &rcache)))
1387                         {
1388                         kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1389                                 "krb5_get_server_rcache() fails.\n");
1390                         goto err;
1391                         }
1392                 }
1393
1394         if ((krb5rc = krb5_auth_con_setrcache(krb5context, krb5auth_context, rcache)))
1395                 {
1396                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1397                         "krb5_auth_con_setrcache() fails.\n");
1398                 goto err;
1399                 }
1400
1401
1402         /*      kssl_ctx->keytab_file == NULL ==> use Kerberos default
1403         */
1404         if (kssl_ctx->keytab_file)
1405                 {
1406                 krb5rc = krb5_kt_resolve(krb5context, kssl_ctx->keytab_file,
1407                         &krb5keytab);
1408                 if (krb5rc)
1409                         {
1410                         kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1411                                 "krb5_kt_resolve() fails.\n");
1412                         goto err;
1413                         }
1414                 }
1415         else
1416                 {
1417                 krb5rc = krb5_kt_default(krb5context,&krb5keytab);
1418                 if (krb5rc)
1419                         {
1420                         kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1421                                 "krb5_kt_default() fails.\n");
1422                         goto err;
1423                         }
1424                 }
1425
1426         /*      Actual Kerberos5 krb5_recvauth() has initial conversation here
1427         **      o       check KRB5_SENDAUTH_BADAUTHVERS
1428         **              unless KRB5_RECVAUTH_SKIP_VERSION
1429         **      o       check KRB5_SENDAUTH_BADAPPLVERS
1430         **      o       send "0" msg if all OK
1431         */
1432
1433         /*  20010411 was using AP_REQ instead of true KerberosWrapper
1434         **
1435         **  if ((krb5rc = krb5_rd_req(krb5context, &krb5auth_context,
1436         **                      &krb5in_data, krb5server, krb5keytab,
1437         **                      &ap_option, &krb5ticket)) != 0)  { Error }
1438         */
1439
1440         p = (unsigned char *)indata->data;
1441         if ((asn1ticket = (KRB5_TKTBODY *) d2i_KRB5_TICKET(NULL, &p,
1442                                                 (long) indata->length)) == NULL)
1443                 {
1444                 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1445                         "d2i_KRB5_TICKET() ASN.1 decode failure.\n");
1446                 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1447                 goto err;
1448                 }
1449
1450         /* Was:  krb5rc = krb5_decode_ticket(krb5in_data,&krb5ticket)) != 0) */
1451         if ((krb5rc = kssl_TKT2tkt(krb5context, asn1ticket, &krb5ticket,
1452                                         kssl_err)) != 0)
1453                 {
1454                 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1455                         "Error converting ASN.1 ticket to krb5_ticket.\n");
1456                 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1457                 goto err;
1458                 }
1459
1460         if (! krb5_principal_compare(krb5context, krb5server,
1461                                                   krb5ticket->server))  {
1462                 krb5rc = KRB5_PRINC_NOMATCH;
1463                 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1464                         "server principal != ticket principal\n");
1465                 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1466                 goto err;
1467                 }
1468         if ((krb5rc = krb5_kt_get_entry(krb5context, krb5keytab,
1469                         krb5ticket->server, krb5ticket->enc_part.kvno,
1470                         krb5ticket->enc_part.enctype, &kt_entry)) != 0)  {
1471                 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1472                         "krb5_kt_get_entry() fails with %x.\n", krb5rc);
1473                 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1474                 goto err;
1475                 }
1476         if ((krb5rc = krb5_decrypt_tkt_part(krb5context, &kt_entry.key,
1477                         krb5ticket)) != 0)  {
1478                 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1479                         "krb5_decrypt_tkt_part() failed.\n");
1480                 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1481                 goto err;
1482                 }
1483         else  {
1484                 krb5_kt_free_entry(krb5context, &kt_entry);
1485 #ifdef KSSL_DEBUG
1486                 {
1487                 int i; krb5_address **paddr = krb5ticket->enc_part2->caddrs;
1488                 printf("Decrypted ticket fields:\n");
1489                 printf("\tflags: %X, transit-type: %X",
1490                         krb5ticket->enc_part2->flags,
1491                         krb5ticket->enc_part2->transited.tr_type);
1492                 print_krb5_data("\ttransit-data: ",
1493                         &(krb5ticket->enc_part2->transited.tr_contents));
1494                 printf("\tcaddrs: %p, authdata: %p\n",
1495                         krb5ticket->enc_part2->caddrs,
1496                         krb5ticket->enc_part2->authorization_data);
1497                 if (paddr)
1498                         {
1499                         printf("\tcaddrs:\n");
1500                         for (i=0; paddr[i] != NULL; i++)
1501                                 {
1502                                 krb5_data d;
1503                                 d.length=paddr[i]->length;
1504                                 d.data=paddr[i]->contents;
1505                                 print_krb5_data("\t\tIP: ", &d);
1506                                 }
1507                         }
1508                 printf("\tstart/auth/end times: %d / %d / %d\n",
1509                         krb5ticket->enc_part2->times.starttime,
1510                         krb5ticket->enc_part2->times.authtime,
1511                         krb5ticket->enc_part2->times.endtime);
1512                 }
1513 #endif  /* KSSL_DEBUG */
1514                 }
1515
1516         krb5rc = KRB5_NO_TKT_SUPPLIED;
1517         if (!krb5ticket  ||     !krb5ticket->enc_part2  ||
1518                 !krb5ticket->enc_part2->client  ||
1519                 !krb5ticket->enc_part2->client->data  ||
1520                 !krb5ticket->enc_part2->session)
1521                 {
1522                 kssl_err_set(kssl_err, SSL_R_KRB5_S_BAD_TICKET,
1523                         "bad ticket from krb5_rd_req.\n");
1524                 }
1525         else if (kssl_ctx_setprinc(kssl_ctx, KSSL_CLIENT,
1526                  &krb5ticket->enc_part2->client->realm,
1527                  krb5ticket->enc_part2->client->data,
1528                  krb5ticket->enc_part2->client->length))
1529                 {
1530                 kssl_err_set(kssl_err, SSL_R_KRB5_S_BAD_TICKET,
1531                         "kssl_ctx_setprinc() fails.\n");
1532                 }
1533         else if (kssl_ctx_setkey(kssl_ctx, krb5ticket->enc_part2->session))
1534                 {
1535                 kssl_err_set(kssl_err, SSL_R_KRB5_S_BAD_TICKET,
1536                         "kssl_ctx_setkey() fails.\n");
1537                 }
1538         else if (krb5ticket->enc_part2->flags & TKT_FLG_INVALID)
1539                 {
1540                 krb5rc = KRB5KRB_AP_ERR_TKT_INVALID;
1541                 kssl_err_set(kssl_err, SSL_R_KRB5_S_BAD_TICKET,
1542                         "invalid ticket from krb5_rd_req.\n");
1543                 }
1544         else    krb5rc = 0;
1545
1546         kssl_ctx->enctype       = krb5ticket->enc_part.enctype;
1547         ttimes->authtime        = krb5ticket->enc_part2->times.authtime;
1548         ttimes->starttime       = krb5ticket->enc_part2->times.starttime;
1549         ttimes->endtime         = krb5ticket->enc_part2->times.endtime;
1550         ttimes->renew_till      = krb5ticket->enc_part2->times.renew_till;
1551
1552  err:
1553 #ifdef KSSL_DEBUG
1554         kssl_ctx_show(kssl_ctx);
1555 #endif  /* KSSL_DEBUG */
1556
1557         if (asn1ticket)         KRB5_TICKET_free((KRB5_TICKET *) asn1ticket);
1558         if (krb5keytab)         krb5_kt_close(krb5context, krb5keytab);
1559         if (krb5ticket)         krb5_free_ticket(krb5context, krb5ticket);
1560         if (krb5server)         krb5_free_principal(krb5context, krb5server);
1561         return (krb5rc);
1562         }
1563
1564
1565 /*      Allocate & return a new kssl_ctx struct.
1566 */
1567 KSSL_CTX        *
1568 kssl_ctx_new(void)
1569         {
1570         return ((KSSL_CTX *) kssl_calloc(1, sizeof(KSSL_CTX)));
1571         }
1572
1573
1574 /*      Frees a kssl_ctx struct and any allocated memory it holds.
1575 **      Returns NULL.
1576 */
1577 KSSL_CTX        *
1578 kssl_ctx_free(KSSL_CTX *kssl_ctx)
1579         {
1580         if (kssl_ctx == NULL)  return kssl_ctx;
1581
1582         if (kssl_ctx->key)              OPENSSL_cleanse(kssl_ctx->key,
1583                                                               kssl_ctx->length);
1584         if (kssl_ctx->key)              kssl_free(kssl_ctx->key);
1585         if (kssl_ctx->client_princ)     kssl_free(kssl_ctx->client_princ);
1586         if (kssl_ctx->service_host)     kssl_free(kssl_ctx->service_host);
1587         if (kssl_ctx->service_name)     kssl_free(kssl_ctx->service_name);
1588         if (kssl_ctx->keytab_file)      kssl_free(kssl_ctx->keytab_file);
1589
1590         kssl_free(kssl_ctx);
1591         return (KSSL_CTX *) NULL;
1592         }
1593
1594
1595 /*      Given an array of (krb5_data *) entity (and optional realm),
1596 **      set the plain (char *) client_princ or service_host member
1597 **      of the kssl_ctx struct.
1598 */
1599 krb5_error_code
1600 kssl_ctx_setprinc(KSSL_CTX *kssl_ctx, int which,
1601         krb5_data *realm, krb5_data *entity, int nentities)
1602         {
1603         char    **princ;
1604         int     length;
1605         int i;
1606
1607         if (kssl_ctx == NULL  ||  entity == NULL)  return KSSL_CTX_ERR;
1608
1609         switch (which)
1610                 {
1611         case KSSL_CLIENT:       princ = &kssl_ctx->client_princ;        break;
1612         case KSSL_SERVER:       princ = &kssl_ctx->service_host;        break;
1613         default:                return KSSL_CTX_ERR;                    break;
1614                 }
1615         if (*princ)  kssl_free(*princ);
1616
1617         /* Add up all the entity->lengths */
1618         length = 0;
1619         for (i=0; i < nentities; i++)
1620                 {
1621                 length += entity[i].length;
1622                 }
1623         /* Add in space for the '/' character(s) (if any) */
1624         length += nentities-1;
1625         /* Space for the ('@'+realm+NULL | NULL) */
1626         length += ((realm)? realm->length + 2: 1);
1627
1628         if ((*princ = kssl_calloc(1, length)) == NULL)
1629                 return KSSL_CTX_ERR;
1630         else
1631                 {
1632                 for (i = 0; i < nentities; i++)
1633                         {
1634                         strncat(*princ, entity[i].data, entity[i].length);
1635                         if (i < nentities-1)
1636                                 {
1637                                 strcat (*princ, "/");
1638                                 }
1639                         }
1640                 if (realm)
1641                         {
1642                         strcat (*princ, "@");
1643                         (void) strncat(*princ, realm->data, realm->length);
1644                         }
1645                 }
1646
1647         return KSSL_CTX_OK;
1648         }
1649
1650
1651 /*      Set one of the plain (char *) string members of the kssl_ctx struct.
1652 **      Default values should be:
1653 **              which == KSSL_SERVICE   =>      "khost" (KRB5SVC)
1654 **              which == KSSL_KEYTAB    =>      "/etc/krb5.keytab" (KRB5KEYTAB)
1655 */
1656 krb5_error_code
1657 kssl_ctx_setstring(KSSL_CTX *kssl_ctx, int which, char *text)
1658         {
1659         char    **string;
1660
1661         if (!kssl_ctx)  return KSSL_CTX_ERR;
1662
1663         switch (which)
1664                 {
1665         case KSSL_SERVICE:      string = &kssl_ctx->service_name;       break;
1666         case KSSL_SERVER:       string = &kssl_ctx->service_host;       break;
1667         case KSSL_CLIENT:       string = &kssl_ctx->client_princ;       break;
1668         case KSSL_KEYTAB:       string = &kssl_ctx->keytab_file;        break;
1669         default:                return KSSL_CTX_ERR;                    break;
1670                 }
1671         if (*string)  kssl_free(*string);
1672
1673         if (!text)
1674                 {
1675                 *string = '\0';
1676                 return KSSL_CTX_OK;
1677                 }
1678
1679         if ((*string = kssl_calloc(1, strlen(text) + 1)) == NULL)
1680                 return KSSL_CTX_ERR;
1681         else
1682                 strcpy(*string, text);
1683
1684         return KSSL_CTX_OK;
1685         }
1686
1687
1688 /*      Copy the Kerberos session key from a (krb5_keyblock *) to a kssl_ctx
1689 **      struct.  Clear kssl_ctx->key if Kerberos session key is NULL.
1690 */
1691 krb5_error_code
1692 kssl_ctx_setkey(KSSL_CTX *kssl_ctx, krb5_keyblock *session)
1693         {
1694         int             length;
1695         krb5_enctype    enctype;
1696         krb5_octet FAR  *contents = NULL;
1697
1698         if (!kssl_ctx)  return KSSL_CTX_ERR;
1699
1700         if (kssl_ctx->key)
1701                 {
1702                 OPENSSL_cleanse(kssl_ctx->key, kssl_ctx->length);
1703                 kssl_free(kssl_ctx->key);
1704                 }
1705
1706         if (session)
1707                 {
1708
1709 #ifdef KRB5_HEIMDAL
1710                 length = session->keyvalue->length;
1711                 enctype = session->keytype;
1712                 contents = session->keyvalue->contents;
1713 #else
1714                 length = session->length;
1715                 enctype = session->enctype;
1716                 contents = session->contents;
1717 #endif
1718                 kssl_ctx->enctype = enctype;
1719                 kssl_ctx->length  = length;
1720                 }
1721         else
1722                 {
1723                 kssl_ctx->enctype = ENCTYPE_UNKNOWN;
1724                 kssl_ctx->length  = 0;
1725                 return KSSL_CTX_OK;
1726                 }
1727
1728         if ((kssl_ctx->key =
1729                 (krb5_octet FAR *) kssl_calloc(1, kssl_ctx->length)) == NULL)
1730                 {
1731                 kssl_ctx->length  = 0;
1732                 return KSSL_CTX_ERR;
1733                 }
1734         else
1735                 memcpy(kssl_ctx->key, contents, length);
1736
1737         return KSSL_CTX_OK;
1738         }
1739
1740
1741 /*      Display contents of kssl_ctx struct
1742 */
1743 void
1744 kssl_ctx_show(KSSL_CTX *kssl_ctx)
1745         {
1746         int     i;
1747
1748         printf("kssl_ctx: ");
1749         if (kssl_ctx == NULL)
1750                 {
1751                 printf("NULL\n");
1752                 return;
1753                 }
1754         else
1755                 printf("%p\n", (void *)kssl_ctx);
1756
1757         printf("\tservice:\t%s\n",
1758                 (kssl_ctx->service_name)? kssl_ctx->service_name: "NULL");
1759         printf("\tclient:\t%s\n",
1760                 (kssl_ctx->client_princ)? kssl_ctx->client_princ: "NULL");
1761         printf("\tserver:\t%s\n",
1762                 (kssl_ctx->service_host)? kssl_ctx->service_host: "NULL");
1763         printf("\tkeytab:\t%s\n",
1764                 (kssl_ctx->keytab_file)? kssl_ctx->keytab_file: "NULL");
1765         printf("\tkey [%d:%d]:\t",
1766                 kssl_ctx->enctype, kssl_ctx->length);
1767
1768         for (i=0; i < kssl_ctx->length  &&  kssl_ctx->key; i++)
1769                 {
1770                 printf("%02x", kssl_ctx->key[i]);
1771                 }
1772         printf("\n");
1773         return;
1774         }
1775
1776     int
1777     kssl_keytab_is_available(KSSL_CTX *kssl_ctx)
1778 {
1779     krb5_context                krb5context = NULL;
1780     krb5_keytab                 krb5keytab = NULL;
1781     krb5_keytab_entry           entry;
1782     krb5_principal              princ = NULL;
1783     krb5_error_code             krb5rc = KRB5KRB_ERR_GENERIC;
1784     int rc = 0;
1785
1786     if ((krb5rc = krb5_init_context(&krb5context)))
1787         return(0);
1788
1789     /*  kssl_ctx->keytab_file == NULL ==> use Kerberos default
1790     */
1791     if (kssl_ctx->keytab_file)
1792     {
1793         krb5rc = krb5_kt_resolve(krb5context, kssl_ctx->keytab_file,
1794                                   &krb5keytab);
1795         if (krb5rc)
1796             goto exit;
1797     }
1798     else
1799     {
1800         krb5rc = krb5_kt_default(krb5context,&krb5keytab);
1801         if (krb5rc)
1802             goto exit;
1803     }
1804
1805     /* the host key we are looking for */
1806     krb5rc = krb5_sname_to_principal(krb5context, NULL,
1807                                      kssl_ctx->service_name ? kssl_ctx->service_name: KRB5SVC,
1808                                      KRB5_NT_SRV_HST, &princ);
1809
1810     krb5rc = krb5_kt_get_entry(krb5context, krb5keytab,
1811                                 princ,
1812                                 0 /* IGNORE_VNO */,
1813                                 0 /* IGNORE_ENCTYPE */,
1814                                 &entry);
1815     if ( krb5rc == KRB5_KT_NOTFOUND ) {
1816         rc = 1;
1817         goto exit;
1818     } else if ( krb5rc )
1819         goto exit;
1820
1821     krb5_kt_free_entry(krb5context, &entry);
1822     rc = 1;
1823
1824   exit:
1825     if (krb5keytab)     krb5_kt_close(krb5context, krb5keytab);
1826     if (princ)          krb5_free_principal(krb5context, princ);
1827     if (krb5context)    krb5_free_context(krb5context);
1828     return(rc);
1829 }
1830
1831 int
1832 kssl_tgt_is_available(KSSL_CTX *kssl_ctx)
1833         {
1834         krb5_error_code         krb5rc = KRB5KRB_ERR_GENERIC;
1835         krb5_context            krb5context = NULL;
1836         krb5_ccache             krb5ccdef = NULL;
1837         krb5_creds              krb5creds, *krb5credsp = NULL;
1838         int                     rc = 0;
1839
1840         memset((char *)&krb5creds, 0, sizeof(krb5creds));
1841
1842         if (!kssl_ctx)
1843             return(0);
1844
1845         if (!kssl_ctx->service_host)
1846             return(0);
1847
1848         if ((krb5rc = krb5_init_context(&krb5context)) != 0)
1849             goto err;
1850
1851         if ((krb5rc = krb5_sname_to_principal(krb5context,
1852                                               kssl_ctx->service_host,
1853                                               (kssl_ctx->service_name)? kssl_ctx->service_name: KRB5SVC,
1854                                               KRB5_NT_SRV_HST, &krb5creds.server)) != 0)
1855             goto err;
1856
1857         if ((krb5rc = krb5_cc_default(krb5context, &krb5ccdef)) != 0)
1858             goto err;
1859
1860         if ((krb5rc = krb5_cc_get_principal(krb5context, krb5ccdef,
1861                                              &krb5creds.client)) != 0)
1862             goto err;
1863
1864         if ((krb5rc = krb5_get_credentials(krb5context, 0, krb5ccdef,
1865                                             &krb5creds, &krb5credsp)) != 0)
1866             goto err;
1867
1868         rc = 1;
1869
1870       err:
1871 #ifdef KSSL_DEBUG
1872         kssl_ctx_show(kssl_ctx);
1873 #endif  /* KSSL_DEBUG */
1874
1875         if (krb5creds.client)   krb5_free_principal(krb5context, krb5creds.client);
1876         if (krb5creds.server)   krb5_free_principal(krb5context, krb5creds.server);
1877         if (krb5context)        krb5_free_context(krb5context);
1878         return(rc);
1879         }
1880
1881 #if !defined(OPENSSL_SYS_WINDOWS) && !defined(OPENSSL_SYS_WIN32)
1882 void kssl_krb5_free_data_contents(krb5_context context, krb5_data *data)
1883         {
1884 #ifdef KRB5_HEIMDAL
1885         data->length = 0;
1886         if (data->data)
1887             free(data->data);
1888 #elif defined(KRB5_MIT_OLD11)
1889         if (data->data)  {
1890                 krb5_xfree(data->data);
1891                 data->data = 0;
1892                 }
1893 #else
1894         krb5_free_data_contents(NULL, data);
1895 #endif
1896         }
1897 #endif /* !OPENSSL_SYS_WINDOWS && !OPENSSL_SYS_WIN32 */
1898
1899
1900 /*  Given pointers to KerberosTime and struct tm structs, convert the
1901 **  KerberosTime string to struct tm.  Note that KerberosTime is a
1902 **  ASN1_GENERALIZEDTIME value, constrained to GMT with no fractional
1903 **  seconds as defined in RFC 1510.
1904 **  Return pointer to the (partially) filled in struct tm on success,
1905 **  return NULL on failure.
1906 */
1907 struct tm       *k_gmtime(ASN1_GENERALIZEDTIME *gtime, struct tm *k_tm)
1908         {
1909         char            c, *p;
1910
1911         if (!k_tm)  return NULL;
1912         if (gtime == NULL  ||  gtime->length < 14)  return NULL;
1913         if (gtime->data == NULL)  return NULL;
1914
1915         p = (char *)&gtime->data[14];
1916
1917         c = *p;  *p = '\0';  p -= 2;  k_tm->tm_sec  = atoi(p);      *(p+2) = c;
1918         c = *p;  *p = '\0';  p -= 2;  k_tm->tm_min  = atoi(p);      *(p+2) = c;
1919         c = *p;  *p = '\0';  p -= 2;  k_tm->tm_hour = atoi(p);      *(p+2) = c;
1920         c = *p;  *p = '\0';  p -= 2;  k_tm->tm_mday = atoi(p);      *(p+2) = c;
1921         c = *p;  *p = '\0';  p -= 2;  k_tm->tm_mon  = atoi(p)-1;    *(p+2) = c;
1922         c = *p;  *p = '\0';  p -= 4;  k_tm->tm_year = atoi(p)-1900; *(p+4) = c;
1923
1924         return k_tm;
1925         }
1926
1927
1928 /*  Helper function for kssl_validate_times().
1929 **  We need context->clockskew, but krb5_context is an opaque struct.
1930 **  So we try to sneek the clockskew out through the replay cache.
1931 **      If that fails just return a likely default (300 seconds).
1932 */
1933 krb5_deltat     get_rc_clockskew(krb5_context context)
1934         {
1935         krb5_rcache     rc;
1936         krb5_deltat     clockskew;
1937
1938         if (krb5_rc_default(context, &rc))  return KSSL_CLOCKSKEW;
1939         if (krb5_rc_initialize(context, rc, 0))  return KSSL_CLOCKSKEW;
1940         if (krb5_rc_get_lifespan(context, rc, &clockskew))  {
1941                 clockskew = KSSL_CLOCKSKEW;
1942                 }
1943         (void) krb5_rc_destroy(context, rc);
1944         return clockskew;
1945         }
1946
1947
1948 /*  kssl_validate_times() combines (and more importantly exposes)
1949 **  the MIT KRB5 internal function krb5_validate_times() and the
1950 **  in_clock_skew() macro.  The authenticator client time is checked
1951 **  to be within clockskew secs of the current time and the current
1952 **  time is checked to be within the ticket start and expire times.
1953 **  Either check may be omitted by supplying a NULL value.
1954 **  Returns 0 for valid times, SSL_R_KRB5* error codes otherwise.
1955 **  See Also: (Kerberos source)/krb5/lib/krb5/krb/valid_times.c
1956 **  20010420 VRS
1957 */
1958 krb5_error_code  kssl_validate_times(   krb5_timestamp atime,
1959                                         krb5_ticket_times *ttimes)
1960         {
1961         krb5_deltat     skew;
1962         krb5_timestamp  start, now;
1963         krb5_error_code rc;
1964         krb5_context    context;
1965
1966         if ((rc = krb5_init_context(&context)))  return SSL_R_KRB5_S_BAD_TICKET;
1967         skew = get_rc_clockskew(context);
1968         if ((rc = krb5_timeofday(context,&now))) return SSL_R_KRB5_S_BAD_TICKET;
1969         krb5_free_context(context);
1970
1971         if (atime  &&  labs(atime - now) >= skew)  return SSL_R_KRB5_S_TKT_SKEW;
1972
1973         if (! ttimes)  return 0;
1974
1975         start = (ttimes->starttime != 0)? ttimes->starttime: ttimes->authtime;
1976         if (start - now > skew)  return SSL_R_KRB5_S_TKT_NYV;
1977         if ((now - ttimes->endtime) > skew)  return SSL_R_KRB5_S_TKT_EXPIRED;
1978
1979 #ifdef KSSL_DEBUG
1980         printf("kssl_validate_times: %d |<-  | %d - %d | < %d  ->| %d\n",
1981                 start, atime, now, skew, ttimes->endtime);
1982 #endif  /* KSSL_DEBUG */
1983
1984         return 0;
1985         }
1986
1987
1988 /*  Decode and decrypt given DER-encoded authenticator, then pass
1989 **  authenticator ctime back in *atimep (or 0 if time unavailable).
1990 **  Returns krb5_error_code and kssl_err on error.  A NULL
1991 **  authenticator (authentp->length == 0) is not considered an error.
1992 **  Note that kssl_check_authent() makes use of the KRB5 session key;
1993 **  you must call kssl_sget_tkt() to get the key before calling this routine.
1994 */
1995 krb5_error_code  kssl_check_authent(
1996                         /* IN     */    KSSL_CTX        *kssl_ctx,
1997                         /* IN     */    krb5_data       *authentp,
1998                         /* OUT    */    krb5_timestamp  *atimep,
1999                         /* OUT    */    KSSL_ERR        *kssl_err  )
2000         {
2001         krb5_error_code         krb5rc = 0;
2002         KRB5_ENCDATA            *dec_authent = NULL;
2003         KRB5_AUTHENTBODY        *auth = NULL;
2004         krb5_enctype            enctype;
2005         EVP_CIPHER_CTX          ciph_ctx;
2006         const EVP_CIPHER        *enc = NULL;
2007         unsigned char           iv[EVP_MAX_IV_LENGTH];
2008         const unsigned char     *p;
2009         unsigned char           *unenc_authent;
2010         int                     outl, unencbufsize;
2011         struct tm               tm_time, *tm_l, *tm_g;
2012         time_t                  now, tl, tg, tr, tz_offset;
2013
2014         EVP_CIPHER_CTX_init(&ciph_ctx);
2015         *atimep = 0;
2016         kssl_err_set(kssl_err, 0, "");
2017
2018 #ifndef KRB5CHECKAUTH
2019         authentp = NULL;
2020 #else
2021 #if     KRB5CHECKAUTH == 0
2022         authentp = NULL;
2023 #endif
2024 #endif  /* KRB5CHECKAUTH */
2025
2026         if (authentp == NULL  ||  authentp->length == 0)  return 0;
2027
2028 #ifdef KSSL_DEBUG
2029         {
2030         unsigned int ui;
2031         printf("kssl_check_authent: authenticator[%d]:\n",authentp->length);
2032         p = authentp->data;
2033         for (ui=0; ui < authentp->length; ui++)  printf("%02x ",p[ui]);
2034         printf("\n");
2035         }
2036 #endif  /* KSSL_DEBUG */
2037
2038         unencbufsize = 2 * authentp->length;
2039         if ((unenc_authent = calloc(1, unencbufsize)) == NULL)
2040                 {
2041                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
2042                         "Unable to allocate authenticator buffer.\n");
2043                 krb5rc = KRB5KRB_ERR_GENERIC;
2044                 goto err;
2045                 }
2046
2047         p = (unsigned char *)authentp->data;
2048         if ((dec_authent = d2i_KRB5_ENCDATA(NULL, &p,
2049                                         (long) authentp->length)) == NULL)
2050                 {
2051                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
2052                         "Error decoding authenticator.\n");
2053                 krb5rc = KRB5KRB_AP_ERR_BAD_INTEGRITY;
2054                 goto err;
2055                 }
2056
2057         enctype = dec_authent->etype->data[0];  /* should = kssl_ctx->enctype */
2058 #if !defined(KRB5_MIT_OLD11)
2059             switch ( enctype ) {
2060             case ENCTYPE_DES3_CBC_SHA1:         /*    EVP_des_ede3_cbc();  */
2061             case ENCTYPE_DES3_CBC_SHA:
2062             case ENCTYPE_DES3_CBC_RAW:
2063                 krb5rc = 0;                     /* Skip, can't handle derived keys */
2064                 goto err;
2065             }
2066 #endif
2067         enc = kssl_map_enc(enctype);
2068         memset(iv, 0, sizeof iv);       /* per RFC 1510 */
2069
2070         if (enc == NULL)
2071                 {
2072                 /*  Disable kssl_check_authent for ENCTYPE_DES3_CBC_SHA1.
2073                 **  This enctype indicates the authenticator was encrypted
2074                 **  using key-usage derived keys which openssl cannot decrypt.
2075                 */
2076                 goto err;
2077                 }
2078
2079         if (!EVP_CipherInit(&ciph_ctx,enc,kssl_ctx->key,iv,0))
2080                 {
2081                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
2082                         "EVP_CipherInit error decrypting authenticator.\n");
2083                 krb5rc = KRB5KRB_AP_ERR_BAD_INTEGRITY;
2084                 goto err;
2085                 }
2086         outl = dec_authent->cipher->length;
2087         if (!EVP_Cipher(&ciph_ctx,unenc_authent,dec_authent->cipher->data,outl))
2088                 {
2089                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
2090                         "EVP_Cipher error decrypting authenticator.\n");
2091                 krb5rc = KRB5KRB_AP_ERR_BAD_INTEGRITY;
2092                 goto err;
2093                 }
2094         EVP_CIPHER_CTX_cleanup(&ciph_ctx);
2095
2096 #ifdef KSSL_DEBUG
2097         printf("kssl_check_authent: decrypted authenticator[%d] =\n", outl);
2098         for (padl=0; padl < outl; padl++) printf("%02x ",unenc_authent[padl]);
2099         printf("\n");
2100 #endif  /* KSSL_DEBUG */
2101
2102         if ((p = kssl_skip_confound(enctype, unenc_authent)) == NULL)
2103                 {
2104                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
2105                         "confounded by authenticator.\n");
2106                 krb5rc = KRB5KRB_AP_ERR_BAD_INTEGRITY;
2107                 goto err;
2108                 }
2109         outl -= p - unenc_authent;
2110
2111         if ((auth = (KRB5_AUTHENTBODY *) d2i_KRB5_AUTHENT(NULL, &p,
2112                                                           (long) outl))==NULL)
2113                 {
2114                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
2115                         "Error decoding authenticator body.\n");
2116                 krb5rc = KRB5KRB_AP_ERR_BAD_INTEGRITY;
2117                 goto err;
2118                 }
2119
2120         memset(&tm_time,0,sizeof(struct tm));
2121         if (k_gmtime(auth->ctime, &tm_time)  &&
2122                 ((tr = mktime(&tm_time)) != (time_t)(-1)))
2123                 {
2124                 now  = time(&now);
2125                 tm_l = localtime(&now);         tl = mktime(tm_l);
2126                 tm_g = gmtime(&now);            tg = mktime(tm_g);
2127                 tz_offset = tg - tl;
2128
2129                 *atimep = tr - tz_offset;
2130                 }
2131
2132 #ifdef KSSL_DEBUG
2133         printf("kssl_check_authent: returns %d for client time ", *atimep);
2134         if (auth && auth->ctime && auth->ctime->length && auth->ctime->data)
2135                 printf("%.*s\n", auth->ctime->length, auth->ctime->data);
2136         else    printf("NULL\n");
2137 #endif  /* KSSL_DEBUG */
2138
2139  err:
2140         if (auth)               KRB5_AUTHENT_free((KRB5_AUTHENT *) auth);
2141         if (dec_authent)        KRB5_ENCDATA_free(dec_authent);
2142         if (unenc_authent)      free(unenc_authent);
2143         EVP_CIPHER_CTX_cleanup(&ciph_ctx);
2144         return krb5rc;
2145         }
2146
2147
2148 /*  Replaces krb5_build_principal_ext(), with varargs length == 2 (svc, host),
2149 **  because I dont't know how to stub varargs.
2150 **  Returns krb5_error_code == ENOMEM on alloc error, otherwise
2151 **  passes back newly constructed principal, which should be freed by caller.
2152 */
2153 krb5_error_code  kssl_build_principal_2(
2154                         /* UPDATE */    krb5_context    context,
2155                         /* OUT    */    krb5_principal  *princ,
2156                         /* IN     */    int rlen,  const char *realm,
2157                         /* IN     */    int slen,  const char *svc,
2158                         /* IN     */    int hlen,  const char *host)
2159         {
2160         krb5_data               *p_data = NULL;
2161         krb5_principal          new_p = NULL;
2162         char                    *new_r = NULL;
2163
2164         if ((p_data = (krb5_data *) calloc(2, sizeof(krb5_data))) == NULL  ||
2165             (new_p = (krb5_principal) calloc(1, sizeof(krb5_principal_data)))
2166                         == NULL)  goto err;
2167         new_p->length = 2;
2168         new_p->data = p_data;
2169
2170         if ((new_r = calloc(1, rlen + 1)) == NULL)  goto err;
2171         memcpy(new_r, realm, rlen);
2172         krb5_princ_set_realm_length(context, new_p, rlen);
2173         krb5_princ_set_realm_data(context, new_p, new_r);
2174
2175         if ((new_p->data[0].data = calloc(1, slen + 1)) == NULL)  goto err;
2176         memcpy(new_p->data[0].data, svc, slen);
2177         new_p->data[0].length = slen;
2178
2179         if ((new_p->data[1].data = calloc(1, hlen + 1)) == NULL)  goto err;
2180         memcpy(new_p->data[1].data, host, hlen);
2181         new_p->data[1].length = hlen;
2182
2183         krb5_princ_type(context, new_p) = KRB5_NT_UNKNOWN;
2184         *princ = new_p;
2185         return 0;
2186
2187  err:
2188         if (new_p  &&  new_p[0].data)   free(new_p[0].data);
2189         if (new_p  &&  new_p[1].data)   free(new_p[1].data);
2190         if (new_p)      free(new_p);
2191         if (new_r)      free(new_r);
2192         return ENOMEM;
2193         }
2194
2195
2196 #else /* !OPENSSL_NO_KRB5 */
2197
2198 #if defined(PEDANTIC) || defined(OPENSSL_SYS_VMS)
2199 static void *dummy=&dummy;
2200 #endif
2201
2202 #endif  /* !OPENSSL_NO_KRB5     */
2203