ssl/kssl.c

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