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 #include <string.h>
  72 #define _XOPEN_SOURCE /* glibc2 needs this to declare strptime() */
  73 #include <time.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_krb5_rc_initialize   kssl_krb5_rc_initialize
 124 #define krb5_krb5_rc_get_lifespan kssl_krb5_rc_get_lifespan
 125 #define krb5_krb5_rc_destroy      kssl_krb5_rc_destroy
 126
 127 /* Prototypes for built in stubs */
 128 void kssl_krb5_free_data_contents(krb5_context, krb5_data *);
 129 void kssl_krb5_free_principal(krb5_context, krb5_principal );
 130 krb5_error_code kssl_krb5_kt_resolve(krb5_context,
 131                                      krb5_const char *,
 132                                      krb5_keytab *);
 133 krb5_error_code kssl_krb5_kt_default(krb5_context,
 134                                      krb5_keytab *);
 135 krb5_error_code kssl_krb5_free_ticket(krb5_context, krb5_ticket *);
 136 krb5_error_code kssl_krb5_rd_req(krb5_context, krb5_auth_context *,
 137                                  krb5_const krb5_data *,
 138                                  krb5_const_principal, krb5_keytab,
 139                                  krb5_flags *,krb5_ticket **);
 140
 141 krb5_boolean kssl_krb5_principal_compare(krb5_context, krb5_const_principal,
 142                                          krb5_const_principal);
 143 krb5_error_code krb5_decrypt_tkt_part(krb5_context, krb5_const krb5_keyblock *,
 144                                       krb5_ticket *);
 145 krb5_error_code krb5_timeofday(krb5_context context, krb5_int32 *timeret);
 146 krb5_error_code krb5_rc_default(krb5_context context, krb5_rcache *rc);
 147 krb5_error_code krb5_rc_initialize(krb5_context context, krb5_rcache rc,
 148                                      krb5_deltat lifespan);
 149 krb5_error_code krb5_rc_get_lifespan(krb5_context context, krb5_rcache rc,
 150                                      krb5_deltat *lifespan);
 151 krb5_error_code krb5_rc_destroy(krb5_context context, krb5_rcache rc);
 152
 153 krb5_error_code kssl_krb5_mk_req_extended(krb5_context,
 154                                           krb5_auth_context  *,
 155                                           krb5_const krb5_flags,
 156                                           krb5_data  *,
 157                                           krb5_creds  *,
 158                                           krb5_data  * );
 159 krb5_error_code kssl_krb5_init_context(krb5_context *);
 160 void kssl_krb5_free_context(krb5_context);
 161 krb5_error_code kssl_krb5_cc_default(krb5_context,krb5_ccache  *);
 162 krb5_error_code kssl_krb5_sname_to_principal(krb5_context,
 163                                              krb5_const char  *,
 164                                              krb5_const char  *,
 165                                              krb5_int32,
 166                                              krb5_principal  *);
 167 krb5_error_code kssl_krb5_get_credentials(krb5_context,
 168                                           krb5_const krb5_flags,
 169                                           krb5_ccache,
 170                                           krb5_creds  *,
 171                                           krb5_creds  *  *);
 172 krb5_error_code kssl_krb5_auth_con_init(krb5_context,
 173                                         krb5_auth_context  *);
 174 krb5_error_code kssl_krb5_cc_get_principal(krb5_context context,
 175                                            krb5_ccache cache,
 176                                            krb5_principal *principal);
 177 krb5_error_code kssl_krb5_auth_con_free(krb5_context,krb5_auth_context);
 178
 179 /* Function pointers (almost all Kerberos functions are _stdcall) */
 180 static void (_stdcall *p_krb5_free_data_contents)(krb5_context, krb5_data *)
 181         =NULL;
 182 static void (_stdcall *p_krb5_free_principal)(krb5_context, krb5_principal )
 183         =NULL;
 184 static krb5_error_code(_stdcall *p_krb5_kt_resolve)
 185                         (krb5_context, krb5_const char *, krb5_keytab *)=NULL;
 186 static krb5_error_code (_stdcall *p_krb5_kt_default)(krb5_context,
 187                                                      krb5_keytab *)=NULL;
 188 static krb5_error_code (_stdcall *p_krb5_free_ticket)(krb5_context,
 189                                                       krb5_ticket *)=NULL;
 190 static krb5_error_code (_stdcall *p_krb5_rd_req)(krb5_context,
 191                                                  krb5_auth_context *,
 192                                                  krb5_const krb5_data *,
 193                                                  krb5_const_principal,
 194                                                  krb5_keytab, krb5_flags *,
 195                                                  krb5_ticket **)=NULL;
 196 static krb5_error_code (_stdcall *p_krb5_mk_req_extended)
 197                         (krb5_context, krb5_auth_context *,
 198                          krb5_const krb5_flags, krb5_data *, krb5_creds *,
 199                          krb5_data * )=NULL;
 200 static krb5_error_code (_stdcall *p_krb5_init_context)(krb5_context *)=NULL;
 201 static void (_stdcall *p_krb5_free_context)(krb5_context)=NULL;
 202 static krb5_error_code (_stdcall *p_krb5_cc_default)(krb5_context,
 203                                                      krb5_ccache  *)=NULL;
 204 static krb5_error_code (_stdcall *p_krb5_sname_to_principal)
 205                         (krb5_context, krb5_const char *, krb5_const char *,
 206                          krb5_int32, krb5_principal *)=NULL;
 207 static krb5_error_code (_stdcall *p_krb5_get_credentials)
 208                         (krb5_context, krb5_const krb5_flags, krb5_ccache,
 209                          krb5_creds *, krb5_creds **)=NULL;
 210 static krb5_error_code (_stdcall *p_krb5_auth_con_init)
 211                         (krb5_context, krb5_auth_context *)=NULL;
 212 static krb5_error_code (_stdcall *p_krb5_cc_get_principal)
 213                         (krb5_context context, krb5_ccache cache,
 214                          krb5_principal *principal)=NULL;
 215 static krb5_error_code (_stdcall *p_krb5_auth_con_free)
 216                         (krb5_context, krb5_auth_context)=NULL;
 217 static int krb5_loaded = 0;     /* only attempt to initialize func ptrs once */
 218
 219 /* Function to Load the Kerberos 5 DLL and initialize function pointers */
 220 void
 221 load_krb5_dll(void)
 222         {
 223         HANDLE hKRB5_32;
 224
 225         krb5_loaded++;
 226         hKRB5_32 = LoadLibrary("KRB5_32");
 227         if (!hKRB5_32)
 228                 return;
 229
 230         (FARPROC) p_krb5_free_data_contents =
 231                 GetProcAddress( hKRB5_32, "krb5_free_data_contents" );
 232         (FARPROC) p_krb5_free_context =
 233                 GetProcAddress( hKRB5_32, "krb5_free_context" );
 234         (FARPROC) p_krb5_auth_con_free =
 235                 GetProcAddress( hKRB5_32, "krb5_auth_con_free" );
 236         (FARPROC) p_krb5_free_principal =
 237                 GetProcAddress( hKRB5_32, "krb5_free_principal" );
 238         (FARPROC) p_krb5_mk_req_extended =
 239                 GetProcAddress( hKRB5_32, "krb5_mk_req_extended" );
 240         (FARPROC) p_krb5_get_credentials =
 241                 GetProcAddress( hKRB5_32, "krb5_get_credentials" );
 242         (FARPROC) p_krb5_cc_get_principal =
 243                 GetProcAddress( hKRB5_32, "krb5_cc_get_principal" );
 244         (FARPROC) p_krb5_cc_default =
 245                 GetProcAddress( hKRB5_32, "krb5_cc_default" );
 246         (FARPROC) p_krb5_sname_to_principal =
 247                 GetProcAddress( hKRB5_32, "krb5_sname_to_principal" );
 248         (FARPROC) p_krb5_init_context =
 249                 GetProcAddress( hKRB5_32, "krb5_init_context" );
 250         (FARPROC) p_krb5_free_ticket =
 251                 GetProcAddress( hKRB5_32, "krb5_free_ticket" );
 252         (FARPROC) p_krb5_rd_req =
 253                 GetProcAddress( hKRB5_32, "krb5_rd_req" );
 254         (FARPROC) p_krb5_principal_compare =
 255                 GetProcAddress( hKRB5_32, "krb5_principal_compare" );
 256         (FARPROC) p_krb5_decrypt_tkt_part =
 257                 GetProcAddress( hKRB5_32, "krb5_decrypt_tkt_part" );
 258         (FARPROC) p_krb5_timeofday =
 259                 GetProcAddress( hKRB5_32, "krb5_timeofday" );
 260         (FARPROC) p_krb5_rc_default =
 261                 GetProcAddress( hKRB5_32, "krb5_rc_default" );
 262         (FARPROC) p_krb5_rc_initialize =
 263                 GetProcAddress( hKRB5_32, "krb5_rc_initialize" );
 264         (FARPROC) p_krb5_rc_get_lifespan =
 265                 GetProcAddress( hKRB5_32, "krb5_rc_get_lifespan" );
 266         (FARPROC) p_krb5_rc_destroy =
 267                 GetProcAddress( hKRB5_32, "krb5_rc_destroy" );
 268         (FARPROC) p_krb5_kt_default =
 269                 GetProcAddress( hKRB5_32, "krb5_kt_default" );
 270         (FARPROC) p_krb5_kt_resolve =
 271                 GetProcAddress( hKRB5_32, "krb5_kt_resolve" );
 272         (FARPROC) p_krb5_auth_con_init =
 273                 GetProcAddress( hKRB5_32, "krb5_auth_con_init" );
 274         }
 275
 276 /* Stubs for each function to be dynamicly loaded */
 277 void
 278 kssl_krb5_free_data_contents(krb5_context CO, krb5_data  * data)
 279         {
 280         if (!krb5_loaded)
 281                 load_krb5_dll();
 282
 283         if ( p_krb5_free_data_contents )
 284                 p_krb5_free_data_contents(CO,data);
 285         }
 286
 287 krb5_error_code
 288 kssl_krb5_mk_req_extended (krb5_context CO,
 289                           krb5_auth_context  * pACO,
 290                           krb5_const krb5_flags F,
 291                           krb5_data  * pD1,
 292                           krb5_creds  * pC,
 293                           krb5_data  * pD2)
 294         {
 295         if (!krb5_loaded)
 296                 load_krb5_dll();
 297
 298         if ( p_krb5_mk_req_extended )
 299                 return(p_krb5_mk_req_extended(CO,pACO,F,pD1,pC,pD2));
 300         else
 301                 return KRB5KRB_ERR_GENERIC;
 302         }
 303 krb5_error_code
 304 kssl_krb5_auth_con_init(krb5_context CO,
 305                        krb5_auth_context  * pACO)
 306         {
 307         if (!krb5_loaded)
 308                 load_krb5_dll();
 309
 310         if ( p_krb5_auth_con_init )
 311                 return(p_krb5_auth_con_init(CO,pACO));
 312         else
 313                 return KRB5KRB_ERR_GENERIC;
 314         }
 315 krb5_error_code
 316 kssl_krb5_auth_con_free (krb5_context CO,
 317                         krb5_auth_context ACO)
 318         {
 319         if (!krb5_loaded)
 320                 load_krb5_dll();
 321
 322         if ( p_krb5_auth_con_free )
 323                 return(p_krb5_auth_con_free(CO,ACO));
 324         else
 325                 return KRB5KRB_ERR_GENERIC;
 326         }
 327 krb5_error_code
 328 kssl_krb5_get_credentials(krb5_context CO,
 329                          krb5_const krb5_flags F,
 330                          krb5_ccache CC,
 331                          krb5_creds  * pCR,
 332                          krb5_creds  ** ppCR)
 333         {
 334         if (!krb5_loaded)
 335                 load_krb5_dll();
 336
 337         if ( p_krb5_get_credentials )
 338                 return(p_krb5_get_credentials(CO,F,CC,pCR,ppCR));
 339         else
 340                 return KRB5KRB_ERR_GENERIC;
 341         }
 342 krb5_error_code
 343 kssl_krb5_sname_to_principal(krb5_context CO,
 344                             krb5_const char  * pC1,
 345                             krb5_const char  * pC2,
 346                             krb5_int32 I,
 347                             krb5_principal  * pPR)
 348         {
 349         if (!krb5_loaded)
 350                 load_krb5_dll();
 351
 352         if ( p_krb5_sname_to_principal )
 353                 return(p_krb5_sname_to_principal(CO,pC1,pC2,I,pPR));
 354         else
 355                 return KRB5KRB_ERR_GENERIC;
 356         }
 357
 358 krb5_error_code
 359 kssl_krb5_cc_default(krb5_context CO,
 360                     krb5_ccache  * pCC)
 361         {
 362         if (!krb5_loaded)
 363                 load_krb5_dll();
 364
 365         if ( p_krb5_cc_default )
 366                 return(p_krb5_cc_default(CO,pCC));
 367         else
 368                 return KRB5KRB_ERR_GENERIC;
 369         }
 370
 371 krb5_error_code
 372 kssl_krb5_init_context(krb5_context * pCO)
 373         {
 374         if (!krb5_loaded)
 375                 load_krb5_dll();
 376
 377         if ( p_krb5_init_context )
 378                 return(p_krb5_init_context(pCO));
 379         else
 380                 return KRB5KRB_ERR_GENERIC;
 381         }
 382
 383 void
 384 kssl_krb5_free_context(krb5_context CO)
 385         {
 386         if (!krb5_loaded)
 387                 load_krb5_dll();
 388
 389         if ( p_krb5_free_context )
 390                 p_krb5_free_context(CO);
 391         }
 392
 393 void
 394 kssl_krb5_free_principal(krb5_context c, krb5_principal p)
 395         {
 396         if (!krb5_loaded)
 397                 load_krb5_dll();
 398
 399         if ( p_krb5_free_principal )
 400                 p_krb5_free_principal(c,p);
 401         }
 402
 403 krb5_error_code
 404 kssl_krb5_kt_resolve(krb5_context con,
 405                     krb5_const char * sz,
 406                     krb5_keytab * kt)
 407         {
 408         if (!krb5_loaded)
 409                 load_krb5_dll();
 410
 411         if ( p_krb5_kt_resolve )
 412                 return(p_krb5_kt_resolve(con,sz,kt));
 413         else
 414                 return KRB5KRB_ERR_GENERIC;
 415         }
 416
 417 krb5_error_code
 418 kssl_krb5_kt_default(krb5_context con,
 419                     krb5_keytab * kt)
 420         {
 421         if (!krb5_loaded)
 422                 load_krb5_dll();
 423
 424         if ( p_krb5_kt_default )
 425                 return(p_krb5_kt_default(con,kt));
 426         else
 427                 return KRB5KRB_ERR_GENERIC;
 428         }
 429
 430 krb5_error_code
 431 kssl_krb5_free_ticket(krb5_context con,
 432                      krb5_ticket * kt)
 433         {
 434         if (!krb5_loaded)
 435                 load_krb5_dll();
 436
 437         if ( p_krb5_free_ticket )
 438                 return(p_krb5_free_ticket(con,kt));
 439         else
 440                 return KRB5KRB_ERR_GENERIC;
 441         }
 442
 443 krb5_error_code
 444 kssl_krb5_rd_req(krb5_context con, krb5_auth_context * pacon,
 445                 krb5_const krb5_data * data,
 446                 krb5_const_principal princ, krb5_keytab keytab,
 447                 krb5_flags * flags, krb5_ticket ** pptkt)
 448         {
 449         if (!krb5_loaded)
 450                 load_krb5_dll();
 451
 452         if ( p_krb5_rd_req )
 453                 return(p_krb5_rd_req(con,pacon,data,princ,keytab,flags,pptkt));
 454         else
 455                 return KRB5KRB_ERR_GENERIC;
 456         }
 457
 458 krb5_boolean
 459 krb5_principal_compare(krb5_context con, krb5_const_principal princ1,
 460                 krb5_const_principal princ2)
 461         {
 462         if (!krb5_loaded)
 463                 load_krb5_dll();
 464
 465         if ( p_krb5_principal_compare )
 466                 return(p_krb5_principal_compare(con,princ1,princ2);
 467         else
 468                 return KRB5KRB_ERR_GENERIC;
 469         }
 470
 471 krb5_error_code
 472 krb5_decrypt_tkt_part(krb5_context con, krb5_const krb5_keyblock *keys,
 473                 krb5_ticket *ticket)
 474         {
 475         if (!krb5_loaded)
 476                 load_krb5_dll();
 477
 478         if ( p_krb5_decrypt_tkt_part )
 479                 return(p_krb5_decrypt_tkt_part(con,keys,ticket);
 480         else
 481                 return KRB5KRB_ERR_GENERIC;
 482         }
 483
 484 krb5_error_code
 485 krb5_timeofday(krb5_context con, krb5_int32 *timeret)
 486         {
 487         if (!krb5_loaded)
 488                 load_krb5_dll();
 489
 490         if ( p_krb5_timeofday )
 491                 return(p_krb5_timeofday(con,timeret);
 492         else
 493                 return KRB5KRB_ERR_GENERIC;
 494         }
 495
 496 krb5_error_code
 497 krb5_rc_default(krb5_context con, krb5_rcache *rc)
 498         {
 499         if (!krb5_loaded)
 500                 load_krb5_dll();
 501
 502         if ( p_krb5_rc_default )
 503                 return(p_krb5_rc_default(con,rc);
 504         else
 505                 return KRB5KRB_ERR_GENERIC;
 506         }
 507
 508 krb5_error_code
 509 krb5_rc_initialize(krb5_context con, krb5_rcache rc, krb5_deltat lifespan)
 510         {
 511         if (!krb5_loaded)
 512                 load_krb5_dll();
 513
 514         if ( p_krb5_rc_initialize )
 515                 return(p_krb5_rc_initialize(con, rc, lifespan);
 516         else
 517                 return KRB5KRB_ERR_GENERIC;
 518         }
 519
 520 krb5_error_code
 521 krb5_rc_get_lifespan(krb5_context con, krb5_rcache rc, krb5_deltat *lifespanp)
 522         {
 523         if (!krb5_loaded)
 524                 load_krb5_dll();
 525
 526         if ( p_krb5_rc_get_lifespan )
 527                 return(p_krb5_rc_get_lifespan(con, rc, lifespanp);
 528         else
 529                 return KRB5KRB_ERR_GENERIC;
 530         }
 531
 532 krb5_error_code
 533 krb5_rc_destroy(krb5_context con, krb5_rcache rc)
 534         {
 535         if (!krb5_loaded)
 536                 load_krb5_dll();
 537
 538         if ( p_krb5_rc_destroy )
 539                 return(p_krb5_rc_destroy(con, rc);
 540         else
 541                 return KRB5KRB_ERR_GENERIC;
 542         }
 543
 544 /* Structure definitions  */
 545 #ifndef NO_DEF_KRB5_CCACHE
 546 #ifndef krb5_x
 547 #define krb5_x(ptr,args) ((ptr)?((*(ptr)) args):(abort(),1))
 548 #define krb5_xc(ptr,args) ((ptr)?((*(ptr)) args):(abort(),(char*)0))
 549 #endif
 550
 551 typedef krb5_pointer    krb5_cc_cursor; /* cursor for sequential lookup */
 552
 553 typedef struct _krb5_ccache
 554         {
 555         krb5_magic magic;
 556         struct _krb5_cc_ops FAR *ops;
 557         krb5_pointer data;
 558         } *krb5_ccache;
 559
 560 typedef struct _krb5_cc_ops
 561         {
 562         krb5_magic magic;
 563         char  *prefix;
 564         char  * (KRB5_CALLCONV *get_name)
 565                 KRB5_NPROTOTYPE((krb5_context, krb5_ccache));
 566         krb5_error_code (KRB5_CALLCONV *resolve)
 567                 KRB5_NPROTOTYPE((krb5_context, krb5_ccache  *, const char  *));
 568         krb5_error_code (KRB5_CALLCONV *gen_new)
 569                 KRB5_NPROTOTYPE((krb5_context, krb5_ccache  *));
 570         krb5_error_code (KRB5_CALLCONV *init)
 571                 KRB5_NPROTOTYPE((krb5_context, krb5_ccache, krb5_principal));
 572         krb5_error_code (KRB5_CALLCONV *destroy)
 573                 KRB5_NPROTOTYPE((krb5_context, krb5_ccache));
 574         krb5_error_code (KRB5_CALLCONV *close)
 575                 KRB5_NPROTOTYPE((krb5_context, krb5_ccache));
 576         krb5_error_code (KRB5_CALLCONV *store)
 577                 KRB5_NPROTOTYPE((krb5_context, krb5_ccache, krb5_creds  *));
 578         krb5_error_code (KRB5_CALLCONV *retrieve)
 579                 KRB5_NPROTOTYPE((krb5_context, krb5_ccache,
 580                 krb5_flags, krb5_creds  *, krb5_creds  *));
 581         krb5_error_code (KRB5_CALLCONV *get_princ)
 582                 KRB5_NPROTOTYPE((krb5_context, krb5_ccache, krb5_principal  *));
 583         krb5_error_code (KRB5_CALLCONV *get_first)
 584                 KRB5_NPROTOTYPE((krb5_context, krb5_ccache, krb5_cc_cursor  *));
 585         krb5_error_code (KRB5_CALLCONV *get_next)
 586                 KRB5_NPROTOTYPE((krb5_context, krb5_ccache,
 587                 krb5_cc_cursor  *, krb5_creds  *));
 588         krb5_error_code (KRB5_CALLCONV *end_get)
 589                 KRB5_NPROTOTYPE((krb5_context, krb5_ccache, krb5_cc_cursor  *));
 590         krb5_error_code (KRB5_CALLCONV *remove_cred)
 591                 KRB5_NPROTOTYPE((krb5_context, krb5_ccache,
 592                 krb5_flags, krb5_creds  *));
 593         krb5_error_code (KRB5_CALLCONV *set_flags)
 594                 KRB5_NPROTOTYPE((krb5_context, krb5_ccache, krb5_flags));
 595         } krb5_cc_ops;
 596 #endif /* NO_DEF_KRB5_CCACHE */
 597
 598 krb5_error_code
 599 kssl_krb5_cc_get_principal
 600     (krb5_context context, krb5_ccache cache,
 601       krb5_principal *principal)
 602         {
 603         if ( p_krb5_cc_get_principal )
 604                 return(p_krb5_cc_get_principal(context,cache,principal));
 605         else
 606                 return(krb5_x
 607                         ((cache)->ops->get_princ,(context, cache, principal)));
 608         }
 609 #else
 610 #endif  /* OPENSSL_SYS_WINDOWS || OPENSSL_SYS_WIN32 */
 611
 612 char
 613 *kstring(char *string)
 614         {
 615         static char     *null = "[NULL]";
 616
 617         return ((string == NULL)? null: string);
 618         }
 619
 620 #define MAXKNUM 255
 621 char
 622 *knumber(int len, krb5_octet *contents)
 623         {
 624         static char     buf[MAXKNUM+1];
 625         int             i;
 626
 627         BIO_snprintf(buf, MAXKNUM, "[%d] ", len);
 628
 629         for (i=0; i < len  &&  MAXKNUM > strlen(buf)+3; i++)
 630                 {
 631                 BIO_snprintf(&buf[strlen(buf)], 3, "%02x", contents[i]);
 632                 }
 633
 634         return (buf);
 635         }
 636
 637
 638 /*      Given KRB5 enctype (basically DES or 3DES), return
 639 */
 640 EVP_CIPHER *
 641 kssl_map_enc(krb5_enctype enctype)
 642         {
 643         switch (enctype)
 644                 {
 645         case ENCTYPE_DES_CBC_CRC:
 646         case ENCTYPE_DES_CBC_MD4:
 647         case ENCTYPE_DES_CBC_MD5:
 648         case ENCTYPE_DES_CBC_RAW:
 649 #if ! defined(KRB5_MIT_OLD11)
 650         case ENCTYPE_DES_HMAC_SHA1:
 651 #endif
 652                                 return (EVP_CIPHER *) EVP_des_cbc();
 653                                 break;
 654         case ENCTYPE_DES3_CBC_SHA:
 655         case ENCTYPE_DES3_CBC_RAW:
 656 #if ! defined(KRB5_MIT_OLD11)
 657         case ENCTYPE_DES3_CBC_SHA1:
 658 #endif
 659                                 return (EVP_CIPHER *) EVP_des_ede3_cbc();
 660                                 break;
 661         default:                return (EVP_CIPHER *) NULL;
 662                                 break;
 663                 }
 664         }
 665
 666
 667 /*      Return true:1 if p "looks like" the start of the real authenticator
 668 **      described in kssl_skip_confound() below.  The ASN.1 pattern is
 669 **      "62 xx 30 yy" (APPLICATION-2, SEQUENCE), where xx-yy =~ 2, and
 670 **      xx and yy are possibly multi-byte length fields.
 671 */
 672 int     kssl_test_confound(unsigned char *p)
 673         {
 674         int     len = 2;
 675         int     xx = 0, yy = 0;
 676
 677         if (*p++ != 0x62)  return 0;
 678         if (*p > 0x82)  return 0;
 679         switch(*p)  {
 680                 case 0x82:  p++;          xx = (*p++ << 8);  xx += *p++;  break;
 681                 case 0x81:  p++;          xx =  *p++;  break;
 682                 case 0x80:  return 0;
 683                 default:    xx = *p++;  break;
 684                 }
 685         if (*p++ != 0x30)  return 0;
 686         if (*p > 0x82)  return 0;
 687         switch(*p)  {
 688                 case 0x82:  p++; len+=2;  yy = (*p++ << 8);  yy += *p++;  break;
 689                 case 0x81:  p++; len++;   yy =  *p++;  break;
 690                 case 0x80:  return 0;
 691                 default:    yy = *p++;  break;
 692                 }
 693
 694         return (xx - len == yy)? 1: 0;
 695         }
 696
 697 /*      Allocate, fill, and return cksumlens array of checksum lengths.
 698 **      This array holds just the unique elements from the krb5_cksumarray[].
 699 **      array[n] == 0 signals end of data.
 700 */
 701 int     *populate_cksumlens(void)
 702         {
 703         int             i, j, n = krb5_max_cksum+1;
 704         static int      *cklens = NULL;
 705
 706 #ifdef KRB5CHECKAUTH
 707         if (!cklens && !(cklens = (int *) calloc(sizeof(int), n)))  return NULL;
 708
 709         for (i=0; i < krb5_max_cksum; i++)  {
 710                 if (!krb5_cksumarray[i])  continue;     /*  array has holes  */
 711                 for (j=0; j < krb5_max_cksum; j++)  {
 712                         if (cklens[j] == 0)  {
 713                                 cklens[j] = krb5_cksumarray[i]->checksum_length;
 714                                 break;          /*  krb5 elem was new: add   */
 715                                 }
 716                         if (cklens[j] == krb5_cksumarray[i]->checksum_length)  {
 717                                 break;          /*  ignore duplicate elements */
 718                                 }
 719                         }
 720                 }
 721 #endif  /* KRB5CHECKAUTH */
 722
 723         return cklens;
 724         }
 725
 726 /*      Return pointer to start of real authenticator within authenticator, or
 727 **      return NULL on error.
 728 **      Decrypted authenticator looks like this:
 729 **              [0 or 8 byte confounder] [4-24 byte checksum] [real authent'r]
 730 **      This hackery wouldn't be necessary if MIT KRB5 1.0.6 had the
 731 **      krb5_auth_con_getcksumtype() function advertised in its krb5.h.
 732 */
 733 unsigned char   *kssl_skip_confound(krb5_enctype etype, unsigned char *a)
 734         {
 735         int             i, cklen, conlen;
 736         static int      *cksumlens = NULL;
 737         unsigned char   *test_auth;
 738
 739         conlen = (etype)? 8: 0;
 740
 741         if (!cksumlens  &&  !(cksumlens = populate_cksumlens()))  return NULL;
 742         for (i=0; (cklen = cksumlens[i]) != 0; i++)
 743                 {
 744                 test_auth = a + conlen + cklen;
 745                 if (kssl_test_confound(test_auth))  return test_auth;
 746                 }
 747
 748         return NULL;
 749         }
 750
 751
 752 /*      Set kssl_err error info when reason text is a simple string
 753 **              kssl_err = struct { int reason; char text[KSSL_ERR_MAX+1]; }
 754 */
 755 void
 756 kssl_err_set(KSSL_ERR *kssl_err, int reason, char *text)
 757         {
 758         if (kssl_err == NULL)  return;
 759
 760         kssl_err->reason = reason;
 761         BIO_snprintf(kssl_err->text, KSSL_ERR_MAX, text);
 762         return;
 763         }
 764
 765
 766 /*      Display contents of krb5_data struct, for debugging
 767 */
 768 void
 769 print_krb5_data(char *label, krb5_data *kdata)
 770         {
 771         int     i;
 772
 773         printf("%s[%d] ", label, kdata->length);
 774         for (i=0; i < kdata->length; i++)
 775                 {
 776                 if (0 &&  isprint((int) kdata->data[i]))
 777                         printf( "%c ",  kdata->data[i]);
 778                 else
 779                         printf( "%02x ", (unsigned char) kdata->data[i]);
 780                 }
 781         printf("\n");
 782         }
 783
 784
 785 /*      Display contents of krb5_authdata struct, for debugging
 786 */
 787 void
 788 print_krb5_authdata(char *label, krb5_authdata **adata)
 789         {
 790         if (adata == NULL)
 791                 {
 792                 printf("%s, authdata==0\n", label);
 793                 return;
 794                 }
 795         printf("%s [%p]\n", label, adata);
 796 #if 0
 797         {
 798         int     i;
 799         printf("%s[at%d:%d] ", label, adata->ad_type, adata->length);
 800         for (i=0; i < adata->length; i++)
 801                 {
 802                 printf((isprint(adata->contents[i]))? "%c ": "%02x",
 803                         adata->contents[i]);
 804                 }
 805         printf("\n");
 806         }
 807 #endif
 808         }
 809
 810
 811 /*      Display contents of krb5_keyblock struct, for debugging
 812 */
 813 void
 814 print_krb5_keyblock(char *label, krb5_keyblock *keyblk)
 815         {
 816         int     i;
 817
 818         if (keyblk == NULL)
 819                 {
 820                 printf("%s, keyblk==0\n", label);
 821                 return;
 822                 }
 823 #ifdef KRB5_HEIMDAL
 824         printf("%s\n\t[et%d:%d]: ", label, keyblk->keytype,
 825                                            keyblk->keyvalue->length);
 826         for (i=0; i < keyblk->keyvalue->length; i++)
 827                 {
 828                 printf("%02x",(unsigned char *)(keyblk->keyvalue->contents)[i]);
 829                 }
 830         printf("\n");
 831 #else
 832         printf("%s\n\t[et%d:%d]: ", label, keyblk->enctype, keyblk->length);
 833         for (i=0; i < keyblk->length; i++)
 834                 {
 835                 printf("%02x",keyblk->contents[i]);
 836                 }
 837         printf("\n");
 838 #endif
 839         }
 840
 841
 842 /*      Display contents of krb5_principal_data struct, for debugging
 843 **      (krb5_principal is typedef'd == krb5_principal_data *)
 844 */
 845 void
 846 print_krb5_princ(char *label, krb5_principal_data *princ)
 847         {
 848         int     i, j;
 849
 850         printf("%s principal Realm: ", label);
 851         if (princ == NULL)  return;
 852         for (i=0; i < princ->realm.length; i++)  putchar(princ->realm.data[i]);
 853         printf(" (nametype %d) has %d strings:\n", princ->type,princ->length);
 854         for (i=0; i < princ->length; i++)
 855                 {
 856                 printf("\t%d [%d]: ", i, princ->data[i].length);
 857                 for (j=0; j < princ->data[i].length; j++)  {
 858                         putchar(princ->data[i].data[j]);
 859                         }
 860                 printf("\n");
 861                 }
 862         return;
 863         }
 864
 865
 866 /*      Given krb5 service (typically "kssl") and hostname in kssl_ctx,
 867 **      Return encrypted Kerberos ticket for service @ hostname.
 868 **      If authenp is non-NULL, also return encrypted authenticator,
 869 **      whose data should be freed by caller.
 870 **      (Originally was: Create Kerberos AP_REQ message for SSL Client.)
 871 **
 872 **      19990628        VRS     Started; Returns Kerberos AP_REQ message.
 873 **      20010409        VRS     Modified for RFC2712; Returns enc tkt.
 874 **      20010606        VRS     May also return optional authenticator.
 875 */
 876 krb5_error_code
 877 kssl_cget_tkt(  /* UPDATE */    KSSL_CTX *kssl_ctx,
 878                 /* OUT    */    krb5_data **enc_ticketp,
 879                 /* UPDATE */    krb5_data *authenp,
 880                 /* OUT    */    KSSL_ERR *kssl_err)
 881         {
 882         krb5_error_code         krb5rc = KRB5KRB_ERR_GENERIC;
 883         krb5_context            krb5context = NULL;
 884         krb5_auth_context       krb5auth_context = NULL;
 885         krb5_ccache             krb5ccdef = NULL;
 886         krb5_creds              krb5creds, *krb5credsp = NULL;
 887         krb5_data               krb5_app_req;
 888
 889         kssl_err_set(kssl_err, 0, "");
 890         memset((char *)&krb5creds, 0, sizeof(krb5creds));
 891
 892         if (!kssl_ctx)
 893                 {
 894                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
 895                         "No kssl_ctx defined.\n");
 896                 goto err;
 897                 }
 898         else if (!kssl_ctx->service_host)
 899                 {
 900                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
 901                         "kssl_ctx service_host undefined.\n");
 902                 goto err;
 903                 }
 904
 905         if ((krb5rc = krb5_init_context(&krb5context)) != 0)
 906                 {
 907                 BIO_snprintf(kssl_err->text,KSSL_ERR_MAX,
 908                         "krb5_init_context() fails: %d\n", krb5rc);
 909                 kssl_err->reason = SSL_R_KRB5_C_INIT;
 910                 goto err;
 911                 }
 912
 913         if ((krb5rc = krb5_sname_to_principal(krb5context,
 914                 kssl_ctx->service_host,
 915                 (kssl_ctx->service_name)? kssl_ctx->service_name: KRB5SVC,
 916                 KRB5_NT_SRV_HST, &krb5creds.server)) != 0)
 917                 {
 918                 BIO_snprintf(kssl_err->text,KSSL_ERR_MAX,
 919                         "krb5_sname_to_principal() fails for %s/%s\n",
 920                         kssl_ctx->service_host,
 921                         (kssl_ctx->service_name)? kssl_ctx->service_name:
 922                                                   KRB5SVC);
 923                 kssl_err->reason = SSL_R_KRB5_C_INIT;
 924                 goto err;
 925                 }
 926
 927         if ((krb5rc = krb5_cc_default(krb5context, &krb5ccdef)) != 0)
 928                 {
 929                 kssl_err_set(kssl_err, SSL_R_KRB5_C_CC_PRINC,
 930                         "krb5_cc_default fails.\n");
 931                 goto err;
 932                 }
 933
 934         if ((krb5rc = krb5_cc_get_principal(krb5context, krb5ccdef,
 935                 &krb5creds.client)) != 0)
 936                 {
 937                 kssl_err_set(kssl_err, SSL_R_KRB5_C_CC_PRINC,
 938                         "krb5_cc_get_principal() fails.\n");
 939                 goto err;
 940                 }
 941
 942         if ((krb5rc = krb5_get_credentials(krb5context, 0, krb5ccdef,
 943                 &krb5creds, &krb5credsp)) != 0)
 944                 {
 945                 kssl_err_set(kssl_err, SSL_R_KRB5_C_GET_CRED,
 946                         "krb5_get_credentials() fails.\n");
 947                 goto err;
 948                 }
 949
 950         *enc_ticketp = &krb5credsp->ticket;
 951 #ifdef KRB5_HEIMDAL
 952         kssl_ctx->enctype = krb5credsp->session.keytype;
 953 #else
 954         kssl_ctx->enctype = krb5credsp->keyblock.enctype;
 955 #endif
 956
 957         krb5rc = KRB5KRB_ERR_GENERIC;
 958         /*      caller should free data of krb5_app_req  */
 959         /*  20010406 VRS deleted for real KerberosWrapper
 960         **  20010605 VRS reinstated to offer Authenticator to KerberosWrapper
 961         */
 962         krb5_app_req.length = 0;
 963         if (authenp)
 964                 {
 965                 krb5_data       krb5in_data;
 966                 unsigned char   *p;
 967                 long            arlen;
 968                 KRB5_APREQBODY  *ap_req;
 969
 970                 authenp->length = 0;
 971                 krb5in_data.data = NULL;
 972                 krb5in_data.length = 0;
 973                 if ((krb5rc = krb5_mk_req_extended(krb5context,
 974                         &krb5auth_context, 0, &krb5in_data, krb5credsp,
 975                         &krb5_app_req)) != 0)
 976                         {
 977                         kssl_err_set(kssl_err, SSL_R_KRB5_C_MK_REQ,
 978                                 "krb5_mk_req_extended() fails.\n");
 979                         goto err;
 980                         }
 981
 982                 arlen = krb5_app_req.length;
 983                 p = krb5_app_req.data;
 984                 ap_req = (KRB5_APREQBODY *) d2i_KRB5_APREQ(NULL, &p, arlen);
 985                 if (ap_req)
 986                         {
 987                         authenp->length = i2d_KRB5_ENCDATA(
 988                                         ap_req->authenticator, NULL);
 989                         if (authenp->length  &&
 990                                 (authenp->data = malloc(authenp->length)))
 991                                 {
 992                                 unsigned char   *p = authenp->data;
 993                                 authenp->length = i2d_KRB5_ENCDATA(
 994                                                 ap_req->authenticator, &p);
 995                                 }
 996                         }
 997
 998                 if (ap_req)  KRB5_APREQ_free((KRB5_APREQ *) ap_req);
 999                 if (krb5_app_req.length)  krb5_xfree(krb5_app_req.data);
1000                 }
1001 #ifdef KRB5_HEIMDAL
1002         if (kssl_ctx_setkey(kssl_ctx, &krb5credsp->session))
1003                 {
1004                 kssl_err_set(kssl_err, SSL_R_KRB5_C_INIT,
1005                         "kssl_ctx_setkey() fails.\n");
1006                 }
1007 #else
1008         if (kssl_ctx_setkey(kssl_ctx, &krb5credsp->keyblock))
1009                 {
1010                 kssl_err_set(kssl_err, SSL_R_KRB5_C_INIT,
1011                         "kssl_ctx_setkey() fails.\n");
1012                 }
1013 #endif
1014         else    krb5rc = 0;
1015
1016  err:
1017 #ifdef KSSL_DEBUG
1018         kssl_ctx_show(kssl_ctx);
1019 #endif  /* KSSL_DEBUG */
1020
1021         if (krb5creds.client)   krb5_free_principal(krb5context,
1022                                                         krb5creds.client);
1023         if (krb5creds.server)   krb5_free_principal(krb5context,
1024                                                         krb5creds.server);
1025         if (krb5auth_context)   krb5_auth_con_free(krb5context,
1026                                                         krb5auth_context);
1027         if (krb5context)        krb5_free_context(krb5context);
1028         return (krb5rc);
1029         }
1030
1031
1032 /*  Given d2i_-decoded asn1ticket, allocate and return a new krb5_ticket.
1033 **  Return Kerberos error code and kssl_err struct on error.
1034 **  Allocates krb5_ticket and krb5_principal; caller should free these.
1035 **
1036 **      20010410        VRS     Implemented krb5_decode_ticket() as
1037 **                              old_krb5_decode_ticket(). Missing from MIT1.0.6.
1038 **      20010615        VRS     Re-cast as openssl/asn1 d2i_*() functions.
1039 **                              Re-used some of the old krb5_decode_ticket()
1040 **                              code here.  This tkt should alloc/free just
1041 **                              like the real thing.
1042 */
1043 krb5_error_code
1044 kssl_TKT2tkt(   /* IN     */    krb5_context    krb5context,
1045                 /* IN     */    KRB5_TKTBODY    *asn1ticket,
1046                 /* OUT    */    krb5_ticket     **krb5ticket,
1047                 /* OUT    */    KSSL_ERR *kssl_err  )
1048         {
1049         krb5_error_code                 krb5rc = KRB5KRB_ERR_GENERIC;
1050         krb5_ticket                     *new5ticket = NULL;
1051         ASN1_GENERALSTRING              *gstr_svc, *gstr_host;
1052
1053         *krb5ticket = NULL;
1054
1055         if (asn1ticket == NULL  ||  asn1ticket->realm == NULL  ||
1056                 asn1ticket->sname == NULL  ||
1057                 asn1ticket->sname->namestring == NULL  ||
1058                 asn1ticket->sname->namestring->num < 2)
1059                 {
1060                 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1061                         "Null field in asn1ticket.\n");
1062                 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1063                 return KRB5KRB_ERR_GENERIC;
1064                 }
1065
1066         if ((new5ticket = (krb5_ticket *) calloc(1, sizeof(krb5_ticket)))==NULL)
1067                 {
1068                 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1069                         "Unable to allocate new krb5_ticket.\n");
1070                 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1071                 return ENOMEM;          /*  or  KRB5KRB_ERR_GENERIC;    */
1072                 }
1073
1074         gstr_svc  = (ASN1_GENERALSTRING*)asn1ticket->sname->namestring->data[0];
1075         gstr_host = (ASN1_GENERALSTRING*)asn1ticket->sname->namestring->data[1];
1076
1077         if ((krb5rc = kssl_build_principal_2(krb5context,
1078                         &new5ticket->server,
1079                         asn1ticket->realm->length, asn1ticket->realm->data,
1080                         gstr_svc->length,  gstr_svc->data,
1081                         gstr_host->length, gstr_host->data)) != 0)
1082                 {
1083                 free(new5ticket);
1084                 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1085                         "Error building ticket server principal.\n");
1086                 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1087                 return krb5rc;          /*  or  KRB5KRB_ERR_GENERIC;    */
1088                 }
1089
1090         krb5_princ_type(krb5context, new5ticket->server) =
1091                         asn1ticket->sname->nametype->data[0];
1092         new5ticket->enc_part.enctype = asn1ticket->encdata->etype->data[0];
1093         new5ticket->enc_part.kvno = asn1ticket->encdata->kvno->data[0];
1094         new5ticket->enc_part.ciphertext.length =
1095                         asn1ticket->encdata->cipher->length;
1096         if ((new5ticket->enc_part.ciphertext.data =
1097                 calloc(1, asn1ticket->encdata->cipher->length)) == NULL)
1098                 {
1099                 free(new5ticket);
1100                 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1101                         "Error allocating cipher in krb5ticket.\n");
1102                 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1103                 return KRB5KRB_ERR_GENERIC;
1104                 }
1105         else
1106                 {
1107                 memcpy(new5ticket->enc_part.ciphertext.data,
1108                         asn1ticket->encdata->cipher->data,
1109                         asn1ticket->encdata->cipher->length);
1110                 }
1111
1112         *krb5ticket = new5ticket;
1113         return 0;
1114         }
1115
1116
1117 /*      Given krb5 service name in KSSL_CTX *kssl_ctx (typically "kssl"),
1118 **              and krb5 AP_REQ message & message length,
1119 **      Return Kerberos session key and client principle
1120 **              to SSL Server in KSSL_CTX *kssl_ctx.
1121 **
1122 **      19990702        VRS     Started.
1123 */
1124 krb5_error_code
1125 kssl_sget_tkt(  /* UPDATE */    KSSL_CTX                *kssl_ctx,
1126                 /* IN     */    krb5_data               *indata,
1127                 /* OUT    */    krb5_ticket_times       *ttimes,
1128                 /* OUT    */    KSSL_ERR                *kssl_err  )
1129         {
1130         krb5_error_code                 krb5rc = KRB5KRB_ERR_GENERIC;
1131         static krb5_context             krb5context = NULL;
1132         static krb5_auth_context        krb5auth_context = NULL;
1133         krb5_ticket                     *krb5ticket = NULL;
1134         KRB5_TKTBODY                    *asn1ticket = NULL;
1135         unsigned char                   *p;
1136         krb5_keytab                     krb5keytab = NULL;
1137         krb5_keytab_entry               kt_entry;
1138         krb5_principal                  krb5server;
1139
1140         kssl_err_set(kssl_err, 0, "");
1141
1142         if (!kssl_ctx)
1143                 {
1144                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1145                                         "No kssl_ctx defined.\n");
1146                 goto err;
1147                 }
1148
1149 #ifdef KSSL_DEBUG
1150         printf("in kssl_sget_tkt(%s)\n", kstring(kssl_ctx->service_name));
1151 #endif  /* KSSL_DEBUG */
1152
1153         if (!krb5context  &&  (krb5rc = krb5_init_context(&krb5context)))
1154                 {
1155                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1156                         "krb5_init_context() fails.\n");
1157                 goto err;
1158                 }
1159         if (krb5auth_context  &&
1160                 (krb5rc = krb5_auth_con_free(krb5context, krb5auth_context)))
1161                 {
1162                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1163                         "krb5_auth_con_free() fails.\n");
1164                 goto err;
1165                 }
1166         else  krb5auth_context = NULL;
1167         if (!krb5auth_context  &&
1168                 (krb5rc = krb5_auth_con_init(krb5context, &krb5auth_context)))
1169                 {
1170                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1171                         "krb5_auth_con_init() fails.\n");
1172                 goto err;
1173                 }
1174
1175         if ((krb5rc = krb5_sname_to_principal(krb5context, NULL,
1176                 (kssl_ctx->service_name)? kssl_ctx->service_name: KRB5SVC,
1177                 KRB5_NT_SRV_HST, &krb5server)) != 0)
1178                 {
1179                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1180                         "krb5_sname_to_principal() fails.\n");
1181                 goto err;
1182                 }
1183
1184         /*      kssl_ctx->keytab_file == NULL ==> use Kerberos default
1185         */
1186         if (kssl_ctx->keytab_file)
1187                 {
1188                 krb5rc = krb5_kt_resolve(krb5context, kssl_ctx->keytab_file,
1189                         &krb5keytab);
1190                 if (krb5rc)
1191                         {
1192                         kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1193                                 "krb5_kt_resolve() fails.\n");
1194                         goto err;
1195                         }
1196                 }
1197         else
1198                 {
1199                 krb5rc = krb5_kt_default(krb5context,&krb5keytab);
1200                 if (krb5rc)
1201                         {
1202                         kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1203                                 "krb5_kt_default() fails.\n");
1204                         goto err;
1205                         }
1206                 }
1207
1208         /*      Actual Kerberos5 krb5_recvauth() has initial conversation here
1209         **      o       check KRB5_SENDAUTH_BADAUTHVERS
1210         **              unless KRB5_RECVAUTH_SKIP_VERSION
1211         **      o       check KRB5_SENDAUTH_BADAPPLVERS
1212         **      o       send "0" msg if all OK
1213         */
1214
1215         /*  20010411 was using AP_REQ instead of true KerberosWrapper
1216         **
1217         **  if ((krb5rc = krb5_rd_req(krb5context, &krb5auth_context,
1218         **                      &krb5in_data, krb5server, krb5keytab,
1219         **                      &ap_option, &krb5ticket)) != 0)  { Error }
1220         */
1221
1222         p = indata->data;
1223         if ((asn1ticket = (KRB5_TKTBODY *) d2i_KRB5_TICKET(NULL, &p,
1224                                                 (long) indata->length)) == NULL)
1225                 {
1226                 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1227                         "d2i_KRB5_TICKET() ASN.1 decode failure.\n");
1228                 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1229                 goto err;
1230                 }
1231
1232         /* Was:  krb5rc = krb5_decode_ticket(krb5in_data,&krb5ticket)) != 0) */
1233         if ((krb5rc = kssl_TKT2tkt(krb5context, asn1ticket, &krb5ticket,
1234                                         kssl_err)) != 0)
1235                 {
1236                 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1237                         "Error converting ASN.1 ticket to krb5_ticket.\n");
1238                 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1239                 goto err;
1240                 }
1241
1242         if (! krb5_principal_compare(krb5context, krb5server,
1243                                                   krb5ticket->server))  {
1244                 krb5rc = KRB5_PRINC_NOMATCH;
1245                 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1246                         "server principal != ticket principal\n");
1247                 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1248                 goto err;
1249                 }
1250         if ((krb5rc = krb5_kt_get_entry(krb5context, krb5keytab,
1251                         krb5ticket->server, krb5ticket->enc_part.kvno,
1252                         krb5ticket->enc_part.enctype, &kt_entry)) != 0)  {
1253                 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1254                         "krb5_kt_get_entry() fails with %x.\n", krb5rc);
1255                 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1256                 goto err;
1257                 }
1258         if ((krb5rc = krb5_decrypt_tkt_part(krb5context, &kt_entry.key,
1259                         krb5ticket)) != 0)  {
1260                 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1261                         "krb5_decrypt_tkt_part() failed.\n");
1262                 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1263                 goto err;
1264                 }
1265         else  {
1266                 krb5_kt_free_entry(krb5context, &kt_entry);
1267 #ifdef KSSL_DEBUG
1268                 {
1269                 int i; krb5_address **paddr = krb5ticket->enc_part2->caddrs;
1270                 printf("Decrypted ticket fields:\n");
1271                 printf("\tflags: %X, transit-type: %X",
1272                         krb5ticket->enc_part2->flags,
1273                         krb5ticket->enc_part2->transited.tr_type);
1274                 print_krb5_data("\ttransit-data: ",
1275                         &(krb5ticket->enc_part2->transited.tr_contents));
1276                 printf("\tcaddrs: %p, authdata: %p\n",
1277                         krb5ticket->enc_part2->caddrs,
1278                         krb5ticket->enc_part2->authorization_data);
1279                 printf("\tcaddrs:\n");
1280                 for (i=0; paddr[i] != NULL; i++)
1281                         {  krb5_data d;
1282                         d.length=paddr[i]->length; d.data=paddr[i]->contents;
1283                         print_krb5_data("\t\tIP: ", &d);
1284                         }
1285                 printf("\tstart/auth/end times: %d / %d / %d\n",
1286                         krb5ticket->enc_part2->times.starttime,
1287                         krb5ticket->enc_part2->times.authtime,
1288                         krb5ticket->enc_part2->times.endtime);
1289                 }
1290 #endif  /* KSSL_DEBUG */
1291                 }
1292
1293         krb5rc = KRB5_NO_TKT_SUPPLIED;
1294         if (!krb5ticket  ||     !krb5ticket->enc_part2  ||
1295                 !krb5ticket->enc_part2->client  ||
1296                 !krb5ticket->enc_part2->client->data  ||
1297                 !krb5ticket->enc_part2->session)
1298                 {
1299                 kssl_err_set(kssl_err, SSL_R_KRB5_S_BAD_TICKET,
1300                         "bad ticket from krb5_rd_req.\n");
1301                 }
1302         else if (kssl_ctx_setprinc(kssl_ctx, KSSL_CLIENT,
1303                 &krb5ticket->enc_part2->client->realm,
1304                 krb5ticket->enc_part2->client->data))
1305                 {
1306                 kssl_err_set(kssl_err, SSL_R_KRB5_S_BAD_TICKET,
1307                         "kssl_ctx_setprinc() fails.\n");
1308                 }
1309         else if (kssl_ctx_setkey(kssl_ctx, krb5ticket->enc_part2->session))
1310                 {
1311                 kssl_err_set(kssl_err, SSL_R_KRB5_S_BAD_TICKET,
1312                         "kssl_ctx_setkey() fails.\n");
1313                 }
1314         else if (krb5ticket->enc_part2->flags & TKT_FLG_INVALID)
1315                 {
1316                 krb5rc = KRB5KRB_AP_ERR_TKT_INVALID;
1317                 kssl_err_set(kssl_err, SSL_R_KRB5_S_BAD_TICKET,
1318                         "invalid ticket from krb5_rd_req.\n");
1319                 }
1320         else    krb5rc = 0;
1321
1322         kssl_ctx->enctype       = krb5ticket->enc_part.enctype;
1323         ttimes->authtime        = krb5ticket->enc_part2->times.authtime;
1324         ttimes->starttime       = krb5ticket->enc_part2->times.starttime;
1325         ttimes->endtime         = krb5ticket->enc_part2->times.endtime;
1326         ttimes->renew_till      = krb5ticket->enc_part2->times.renew_till;
1327
1328  err:
1329 #ifdef KSSL_DEBUG
1330         kssl_ctx_show(kssl_ctx);
1331 #endif  /* KSSL_DEBUG */
1332
1333         if (asn1ticket)         KRB5_TICKET_free((KRB5_TICKET *) asn1ticket);
1334         if (krb5keytab)         krb5_kt_close(krb5context, krb5keytab);
1335         if (krb5ticket)         krb5_free_ticket(krb5context, krb5ticket);
1336         if (krb5server)         krb5_free_principal(krb5context, krb5server);
1337         return (krb5rc);
1338         }
1339
1340
1341 /*      Allocate & return a new kssl_ctx struct.
1342 */
1343 KSSL_CTX        *
1344 kssl_ctx_new(void)
1345         {
1346         return ((KSSL_CTX *) calloc(1, sizeof(KSSL_CTX)));
1347         }
1348
1349
1350 /*      Frees a kssl_ctx struct and any allocated memory it holds.
1351 **      Returns NULL.
1352 */
1353 KSSL_CTX        *
1354 kssl_ctx_free(KSSL_CTX *kssl_ctx)
1355         {
1356         if (kssl_ctx == NULL)  return kssl_ctx;
1357
1358         if (kssl_ctx->key)              memset(kssl_ctx->key, 0,
1359                                                               kssl_ctx->length);
1360         if (kssl_ctx->key)              free(kssl_ctx->key);
1361         if (kssl_ctx->client_princ)     free(kssl_ctx->client_princ);
1362         if (kssl_ctx->service_host)     free(kssl_ctx->service_host);
1363         if (kssl_ctx->service_name)     free(kssl_ctx->service_name);
1364         if (kssl_ctx->keytab_file)      free(kssl_ctx->keytab_file);
1365
1366         free(kssl_ctx);
1367         return (KSSL_CTX *) NULL;
1368         }
1369
1370
1371 /*      Given a (krb5_data *) entity (and optional realm),
1372 **      set the plain (char *) client_princ or service_host member
1373 **      of the kssl_ctx struct.
1374 */
1375 krb5_error_code
1376 kssl_ctx_setprinc(KSSL_CTX *kssl_ctx, int which,
1377         krb5_data *realm, krb5_data *entity)
1378         {
1379         char    **princ;
1380         int     length;
1381
1382         if (kssl_ctx == NULL  ||  entity == NULL)  return KSSL_CTX_ERR;
1383
1384         switch (which)
1385                 {
1386         case KSSL_CLIENT:       princ = &kssl_ctx->client_princ;        break;
1387         case KSSL_SERVER:       princ = &kssl_ctx->service_host;        break;
1388         default:                return KSSL_CTX_ERR;                    break;
1389                 }
1390         if (*princ)  free(*princ);
1391
1392         length = entity->length + ((realm)? realm->length + 2: 1);
1393         if ((*princ = calloc(1, length)) == NULL)
1394                 return KSSL_CTX_ERR;
1395         else
1396                 {
1397                 strncpy(*princ, entity->data, entity->length);
1398                 if (realm)
1399                         {
1400                         strcat (*princ, "@");
1401                         (void) strncat(*princ, realm->data, realm->length);
1402                         }
1403                 }
1404
1405         return KSSL_CTX_OK;
1406         }
1407
1408
1409 /*      Set one of the plain (char *) string members of the kssl_ctx struct.
1410 **      Default values should be:
1411 **              which == KSSL_SERVICE   =>      "khost" (KRB5SVC)
1412 **              which == KSSL_KEYTAB    =>      "/etc/krb5.keytab" (KRB5KEYTAB)
1413 */
1414 krb5_error_code
1415 kssl_ctx_setstring(KSSL_CTX *kssl_ctx, int which, char *text)
1416         {
1417         char    **string;
1418
1419         if (!kssl_ctx)  return KSSL_CTX_ERR;
1420
1421         switch (which)
1422                 {
1423         case KSSL_SERVICE:      string = &kssl_ctx->service_name;       break;
1424         case KSSL_SERVER:       string = &kssl_ctx->service_host;       break;
1425         case KSSL_CLIENT:       string = &kssl_ctx->client_princ;       break;
1426         case KSSL_KEYTAB:       string = &kssl_ctx->keytab_file;        break;
1427         default:                return KSSL_CTX_ERR;                    break;
1428                 }
1429         if (*string)  free(*string);
1430
1431         if (!text)
1432                 {
1433                 *string = '\0';
1434                 return KSSL_CTX_OK;
1435                 }
1436
1437         if ((*string = calloc(1, strlen(text) + 1)) == NULL)
1438                 return KSSL_CTX_ERR;
1439         else
1440                 strcpy(*string, text);
1441
1442         return KSSL_CTX_OK;
1443         }
1444
1445
1446 /*      Copy the Kerberos session key from a (krb5_keyblock *) to a kssl_ctx
1447 **      struct.  Clear kssl_ctx->key if Kerberos session key is NULL.
1448 */
1449 krb5_error_code
1450 kssl_ctx_setkey(KSSL_CTX *kssl_ctx, krb5_keyblock *session)
1451         {
1452         int             length;
1453         krb5_enctype    enctype;
1454         krb5_octet FAR  *contents = NULL;
1455
1456         if (!kssl_ctx)  return KSSL_CTX_ERR;
1457
1458         if (kssl_ctx->key)
1459                 {
1460                 memset(kssl_ctx->key, 0, kssl_ctx->length);
1461                 free(kssl_ctx->key);
1462                 }
1463
1464         if (session)
1465                 {
1466
1467 #ifdef KRB5_HEIMDAL
1468                 length = session->keyvalue->length;
1469                 enctype = session->keytype;
1470                 contents = session->keyvalue->contents;
1471 #else
1472                 length = session->length;
1473                 enctype = session->enctype;
1474                 contents = session->contents;
1475 #endif
1476                 kssl_ctx->enctype = enctype;
1477                 kssl_ctx->length  = length;
1478                 }
1479         else
1480                 {
1481                 kssl_ctx->enctype = ENCTYPE_UNKNOWN;
1482                 kssl_ctx->length  = 0;
1483                 return KSSL_CTX_OK;
1484                 }
1485
1486         if ((kssl_ctx->key =
1487                 (krb5_octet FAR *) calloc(1, kssl_ctx->length)) == NULL)
1488                 {
1489                 kssl_ctx->length  = 0;
1490                 return KSSL_CTX_ERR;
1491                 }
1492         else
1493                 memcpy(kssl_ctx->key, contents, length);
1494
1495         return KSSL_CTX_OK;
1496         }
1497
1498
1499 /*      Display contents of kssl_ctx struct
1500 */
1501 void
1502 kssl_ctx_show(KSSL_CTX *kssl_ctx)
1503         {
1504         int     i;
1505
1506         printf("kssl_ctx: ");
1507         if (kssl_ctx == NULL)
1508                 {
1509                 printf("NULL\n");
1510                 return;
1511                 }
1512         else
1513                 printf("%p\n", kssl_ctx);
1514
1515         printf("\tservice:\t%s\n",
1516                 (kssl_ctx->service_name)? kssl_ctx->service_name: "NULL");
1517         printf("\tclient:\t%s\n",
1518                 (kssl_ctx->client_princ)? kssl_ctx->client_princ: "NULL");
1519         printf("\tserver:\t%s\n",
1520                 (kssl_ctx->service_host)? kssl_ctx->service_host: "NULL");
1521         printf("\tkeytab:\t%s\n",
1522                 (kssl_ctx->keytab_file)? kssl_ctx->keytab_file: "NULL");
1523         printf("\tkey [%d:%d]:\t",
1524                 kssl_ctx->enctype, kssl_ctx->length);
1525
1526         for (i=0; i < kssl_ctx->length  &&  kssl_ctx->key; i++)
1527                 {
1528                 printf("%02x", kssl_ctx->key[i]);
1529                 }
1530         printf("\n");
1531         return;
1532         }
1533
1534 void kssl_krb5_free_data_contents(krb5_context context, krb5_data *data)
1535         {
1536 #ifdef KRB5_HEIMDAL
1537         data->length = 0;
1538         free(data->if (data->data) data);
1539 #elif defined(KRB5_MIT_OLD11)
1540         if (data->data)  {
1541                 krb5_xfree(data->data);
1542                 data->data = 0;
1543                 }
1544 #else
1545         krb5_free_data_contents(NULL, data);
1546 #endif
1547         }
1548
1549
1550 /*  Helper function for kssl_validate_times().
1551 **  We need context->clockskew, but krb5_context is an opaque struct.
1552 **  So we try to sneek the clockskew out through the replay cache.
1553 **      If that fails just return a likely default (300 seconds).
1554 */
1555 krb5_deltat     get_rc_clockskew(krb5_context context)
1556         {
1557         krb5_rcache     rc;
1558         krb5_deltat     clockskew;
1559
1560         if (krb5_rc_default(context, &rc))  return KSSL_CLOCKSKEW;
1561         if (krb5_rc_initialize(context, rc, 0))  return KSSL_CLOCKSKEW;
1562         if (krb5_rc_get_lifespan(context, rc, &clockskew))  {
1563                 clockskew = KSSL_CLOCKSKEW;
1564                 }
1565         (void) krb5_rc_destroy(context, rc);
1566         return clockskew;
1567         }
1568
1569
1570 /*  kssl_validate_times() combines (and more importantly exposes)
1571 **  the MIT KRB5 internal function krb5_validate_times() and the
1572 **  in_clock_skew() macro.  The authenticator client time is checked
1573 **  to be within clockskew secs of the current time and the current
1574 **  time is checked to be within the ticket start and expire times.
1575 **  Either check may be omitted by supplying a NULL value.
1576 **  Returns 0 for valid times, SSL_R_KRB5* error codes otherwise.
1577 **  See Also: (Kerberos source)/krb5/lib/krb5/krb/valid_times.c
1578 **  20010420 VRS
1579 */
1580 krb5_error_code  kssl_validate_times(   krb5_timestamp atime,
1581                                         krb5_ticket_times *ttimes)
1582         {
1583         krb5_deltat     skew;
1584         krb5_timestamp  start, now;
1585         krb5_error_code rc;
1586         krb5_context    context;
1587
1588         if ((rc = krb5_init_context(&context)))  return SSL_R_KRB5_S_BAD_TICKET;
1589         skew = get_rc_clockskew(context);
1590         if ((rc = krb5_timeofday(context,&now))) return SSL_R_KRB5_S_BAD_TICKET;
1591         krb5_free_context(context);
1592
1593         if (atime  &&  labs(atime - now) >= skew)  return SSL_R_KRB5_S_TKT_SKEW;
1594
1595         if (! ttimes)  return 0;
1596
1597         start = (ttimes->starttime != 0)? ttimes->starttime: ttimes->authtime;
1598         if (start - now > skew)  return SSL_R_KRB5_S_TKT_NYV;
1599         if ((now - ttimes->endtime) > skew)  return SSL_R_KRB5_S_TKT_EXPIRED;
1600
1601 #ifdef KSSL_DEBUG
1602         printf("kssl_validate_times: %d |<-  | %d - %d | < %d  ->| %d\n",
1603                 start, atime, now, skew, ttimes->endtime);
1604 #endif  /* KSSL_DEBUG */
1605
1606         return 0;
1607         }
1608
1609
1610 /*  Decode and decrypt given DER-encoded authenticator, then pass
1611 **  authenticator ctime back in *atimep (or 0 if time unavailable).
1612 **  Returns krb5_error_code and kssl_err on error.  A NULL
1613 **  authenticator (authentp->length == 0) is not considered an error.
1614 **  Note that kssl_check_authent() makes use of the KRB5 session key;
1615 **  you must call kssl_sget_tkt() to get the key before calling this routine.
1616 */
1617 krb5_error_code  kssl_check_authent(
1618                         /* IN     */    KSSL_CTX        *kssl_ctx,
1619                         /* IN     */    krb5_data       *authentp,
1620                         /* OUT    */    krb5_timestamp  *atimep,
1621                         /* OUT    */    KSSL_ERR        *kssl_err  )
1622         {
1623         krb5_error_code         krb5rc = 0;
1624         KRB5_ENCDATA            *dec_authent = NULL;
1625         KRB5_AUTHENTBODY        *auth = NULL;
1626         krb5_enctype            enctype;
1627         EVP_CIPHER_CTX          ciph_ctx;
1628         EVP_CIPHER              *enc = NULL;
1629         unsigned char           iv[EVP_MAX_IV_LENGTH];
1630         unsigned char           *p, *unenc_authent, *tbuf = NULL;
1631         int                     padl, outl, unencbufsize;
1632         struct tm               tm_time, *tm_l, *tm_g;
1633         time_t                  now, tl, tg, tz_offset;
1634
1635         *atimep = 0;
1636         kssl_err_set(kssl_err, 0, "");
1637
1638 #ifndef KRB5CHECKAUTH
1639         authentp = NULL;
1640 #else
1641 #if     KRB5CHECKAUTH == 0
1642         authentp = NULL;
1643 #endif
1644 #endif  /* KRB5CHECKAUTH */
1645
1646         if (authentp == NULL  ||  authentp->length == 0)  return 0;
1647
1648 #ifdef KSSL_DEBUG
1649         printf("kssl_check_authent: authenticator[%d]:\n",authentp->length);
1650         p = authentp->data;
1651         for (padl=0; padl < authentp->length; padl++)  printf("%02x ",p[padl]);
1652         printf("\n");
1653 #endif  /* KSSL_DEBUG */
1654
1655         unencbufsize = 2 * authentp->length;
1656         if ((unenc_authent = calloc(1, unencbufsize)) == NULL)
1657                 {
1658                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1659                         "Unable to allocate authenticator buffer.\n");
1660                 krb5rc = KRB5KRB_ERR_GENERIC;
1661                 goto err;
1662                 }
1663
1664         p = authentp->data;
1665         if ((dec_authent = d2i_KRB5_ENCDATA(NULL, &p,
1666                                         (long) authentp->length)) == NULL)
1667                 {
1668                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1669                         "Error decoding authenticator.\n");
1670                 krb5rc = KRB5KRB_AP_ERR_BAD_INTEGRITY;
1671                 goto err;
1672                 }
1673
1674         enctype = dec_authent->etype->data[0];  /* should = kssl_ctx->enctype */
1675         enc = kssl_map_enc(enctype);
1676         memset(iv, 0, EVP_MAX_IV_LENGTH);       /* per RFC 1510 */
1677
1678         EVP_DecryptInit(&ciph_ctx, enc, kssl_ctx->key, iv);
1679         EVP_DecryptUpdate(&ciph_ctx, unenc_authent, &outl,
1680                         dec_authent->cipher->data, dec_authent->cipher->length);
1681         if (outl > unencbufsize)
1682                 {
1683                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1684                         "Buffer overflow decrypting authenticator.\n");
1685                 krb5rc = KRB5KRB_AP_ERR_BAD_INTEGRITY;
1686                 goto err;
1687                 }
1688         EVP_DecryptFinal(&ciph_ctx, &(unenc_authent[outl]), &padl);
1689         outl += padl;
1690         if (outl > unencbufsize)
1691                 {
1692                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1693                         "Buffer overflow decrypting authenticator.\n");
1694                 krb5rc = KRB5KRB_AP_ERR_BAD_INTEGRITY;
1695                 goto err;
1696                 }
1697         EVP_CIPHER_CTX_cleanup(&ciph_ctx);
1698
1699 #ifdef KSSL_DEBUG
1700         printf("kssl_check_authent: decrypted authenticator[%d] =\n", outl);
1701         for (padl=0; padl < outl; padl++) printf("%02x ",unenc_authent[padl]);
1702         printf("\n");
1703 #endif  /* KSSL_DEBUG */
1704
1705         if ((p = kssl_skip_confound(enctype, unenc_authent)) == NULL)
1706                 {
1707                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1708                         "confounded by authenticator.\n");
1709                 krb5rc = KRB5KRB_AP_ERR_BAD_INTEGRITY;
1710                 goto err;
1711                 }
1712         outl -= p - unenc_authent;
1713
1714         if ((auth = (KRB5_AUTHENTBODY *) d2i_KRB5_AUTHENT(NULL, &p,
1715                                                           (long) outl))==NULL)
1716                 {
1717                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1718                         "Error decoding authenticator body.\n");
1719                 krb5rc = KRB5KRB_AP_ERR_BAD_INTEGRITY;
1720                 goto err;
1721                 }
1722         if ((tbuf = calloc(1, auth->ctime->length + 1)) == NULL)
1723                 {
1724                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1725                         "Unable to allocate atime buffer.\n");
1726                 krb5rc = KRB5KRB_ERR_GENERIC;
1727                 goto err;
1728                 }
1729         else    strncpy(tbuf, auth->ctime->data, auth->ctime->length);
1730
1731         if (strptime(tbuf, "%Y%m%d%H%M%S", &tm_time) != NULL)
1732                 {
1733                 now  = time(&now);
1734                 tm_l = localtime(&now);         tl = mktime(tm_l);
1735                 tm_g = gmtime(&now);            tg = mktime(tm_g);
1736                 tz_offset = tg - tl;
1737
1738                 *atimep = mktime(&tm_time) - tz_offset;
1739                 }
1740
1741 #ifdef KSSL_DEBUG
1742         printf("kssl_check_authent: client time %s = %d\n", tbuf, *atimep);
1743 #endif  /* KSSL_DEBUG */
1744
1745  err:
1746         if (tbuf)               free(tbuf);
1747         if (auth)               KRB5_AUTHENT_free((KRB5_AUTHENT *) auth);
1748         if (dec_authent)        KRB5_ENCDATA_free(dec_authent);
1749         if (unenc_authent)      free(unenc_authent);
1750         return krb5rc;
1751         }
1752
1753
1754 /*  Replaces krb5_build_principal_ext(), with varargs length == 2 (svc, host),
1755 **  because I dont't know how to stub varargs.
1756 **  Returns krb5_error_code == ENOMEM on alloc error, otherwise
1757 **  passes back newly constructed principal, which should be freed by caller.
1758 */
1759 krb5_error_code  kssl_build_principal_2(
1760                         /* UPDATE */    krb5_context    context,
1761                         /* OUT    */    krb5_principal  *princ,
1762                         /* IN     */    int rlen,  const char *realm,
1763                         /* IN     */    int slen,  const char *svc,
1764                         /* IN     */    int hlen,  const char *host)
1765         {
1766         krb5_data               *p_data = NULL;
1767         krb5_principal          new_p = NULL;
1768         char                    *new_r = NULL;
1769
1770         if ((p_data = (krb5_data *) calloc(2, sizeof(krb5_data))) == NULL  ||
1771             (new_p = (krb5_principal) calloc(1, sizeof(krb5_principal_data)))
1772                         == NULL)  goto err;
1773         new_p->length = 2;
1774         new_p->data = p_data;
1775
1776         if ((new_r = calloc(1, rlen + 1)) == NULL)  goto err;
1777         memcpy(new_r, realm, rlen);
1778         krb5_princ_set_realm_length(context, new_p, rlen);
1779         krb5_princ_set_realm_data(context, new_p, new_r);
1780
1781         if ((new_p->data[0].data = calloc(1, slen + 1)) == NULL)  goto err;
1782         memcpy(new_p->data[0].data, svc, slen);
1783         new_p->data[0].length = slen;
1784
1785         if ((new_p->data[1].data = calloc(1, hlen + 1)) == NULL)  goto err;
1786         memcpy(new_p->data[1].data, host, hlen);
1787         new_p->data[1].length = hlen;
1788
1789         krb5_princ_type(context, new_p) = KRB5_NT_UNKNOWN;
1790         *princ = new_p;
1791         return 0;
1792
1793  err:
1794         if (new_p  &&  new_p[0].data)   free(new_p[0].data);
1795         if (new_p  &&  new_p[1].data)   free(new_p[1].data);
1796         if (new_p)      free(new_p);
1797         if (new_r)      free(new_r);
1798         return ENOMEM;
1799         }
1800
1801
1802 #else /* !OPENSSL_NO_KRB5 */
1803
1804 #if defined(PEDANTIC) || defined(OPENSSL_SYS_VMS)
1805 static int dummy=(int)&dummy;
1806 #endif
1807
1808 #endif  /* !OPENSSL_NO_KRB5     */
1809