ssl/kssl.c

   1 /* ssl/kssl.c -*- mode: C; c-file-style: "eay" -*- */
   2 /* Written by Vern Staats <staatsvr@asc.hpc.mil> for the OpenSSL project 2000.
   3  */
   4 /* ====================================================================
   5  * Copyright (c) 2000 The OpenSSL Project.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  *
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  *
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in
  16  *    the documentation and/or other materials provided with the
  17  *    distribution.
  18  *
  19  * 3. All advertising materials mentioning features or use of this
  20  *    software must display the following acknowledgment:
  21  *    "This product includes software developed by the OpenSSL Project
  22  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  23  *
  24  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  25  *    endorse or promote products derived from this software without
  26  *    prior written permission. For written permission, please contact
  27  *    licensing@OpenSSL.org.
  28  *
  29  * 5. Products derived from this software may not be called "OpenSSL"
  30  *    nor may "OpenSSL" appear in their names without prior written
  31  *    permission of the OpenSSL Project.
  32  *
  33  * 6. Redistributions of any form whatsoever must retain the following
  34  *    acknowledgment:
  35  *    "This product includes software developed by the OpenSSL Project
  36  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  37  *
  38  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  39  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  40  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  41  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  42  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  43  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  44  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  45  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  46  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  47  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  48  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  49  * OF THE POSSIBILITY OF SUCH DAMAGE.
  50  * ====================================================================
  51  *
  52  * This product includes cryptographic software written by Eric Young
  53  * (eay@cryptsoft.com).  This product includes software written by Tim
  54  * Hudson (tjh@cryptsoft.com).
  55  *
  56  */
  57
  58
  59 /*  ssl/kssl.c  --  Routines to support (& debug) Kerberos5 auth for openssl
  60 **
  61 **  19990701    VRS     Started.
  62 **  200011??    Jeffrey Altman, Richard Levitte
  63 **                      Generalized for Heimdal, Newer MIT, & Win32.
  64 **                      Integrated into main OpenSSL 0.9.7 snapshots.
  65 **  20010413    Simon Wilkinson, VRS
  66 **                      Real RFC2712 KerberosWrapper replaces AP_REQ.
  67 */
  68
  69 #include <openssl/opensslconf.h>
  70
  71 #include <string.h>
  72
  73 #define KRB5_PRIVATE    1
  74
  75 #include <openssl/ssl.h>
  76 #include <openssl/evp.h>
  77 #include <openssl/objects.h>
  78 #include <openssl/krb5_asn.h>
  79
  80 #ifndef OPENSSL_NO_KRB5
  81
  82 #ifndef ENOMEM
  83 #define ENOMEM KRB5KRB_ERR_GENERIC
  84 #endif
  85
  86 /*
  87  * When OpenSSL is built on Windows, we do not want to require that
  88  * the Kerberos DLLs be available in order for the OpenSSL DLLs to
  89  * work.  Therefore, all Kerberos routines are loaded at run time
  90  * and we do not link to a .LIB file.
  91  */
  92
  93 #if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_WIN32)
  94 /*
  95  * The purpose of the following pre-processor statements is to provide
  96  * compatibility with different releases of MIT Kerberos for Windows.
  97  * All versions up to 1.2 used macros.  But macros do not allow for
  98  * a binary compatible interface for DLLs.  Therefore, all macros are
  99  * being replaced by function calls.  The following code will allow
 100  * an OpenSSL DLL built on Windows to work whether or not the macro
 101  * or function form of the routines are utilized.
 102  */
 103 #ifdef  krb5_cc_get_principal
 104 #define NO_DEF_KRB5_CCACHE
 105 #undef  krb5_cc_get_principal
 106 #endif
 107 #define krb5_cc_get_principal    kssl_krb5_cc_get_principal
 108
 109 #define krb5_free_data_contents  kssl_krb5_free_data_contents
 110 #define krb5_free_context        kssl_krb5_free_context
 111 #define krb5_auth_con_free       kssl_krb5_auth_con_free
 112 #define krb5_free_principal      kssl_krb5_free_principal
 113 #define krb5_mk_req_extended     kssl_krb5_mk_req_extended
 114 #define krb5_get_credentials     kssl_krb5_get_credentials
 115 #define krb5_cc_default          kssl_krb5_cc_default
 116 #define krb5_sname_to_principal  kssl_krb5_sname_to_principal
 117 #define krb5_init_context        kssl_krb5_init_context
 118 #define krb5_free_ticket         kssl_krb5_free_ticket
 119 #define krb5_rd_req              kssl_krb5_rd_req
 120 #define krb5_kt_default          kssl_krb5_kt_default
 121 #define krb5_kt_resolve          kssl_krb5_kt_resolve
 122 /* macros in mit 1.2.2 and earlier; functions in mit 1.2.3 and greater */
 123 #ifndef krb5_kt_close
 124 #define krb5_kt_close            kssl_krb5_kt_close
 125 #endif /* krb5_kt_close */
 126 #ifndef krb5_kt_get_entry
 127 #define krb5_kt_get_entry        kssl_krb5_kt_get_entry
 128 #endif /* krb5_kt_get_entry */
 129 #define krb5_auth_con_init       kssl_krb5_auth_con_init
 130
 131 #define krb5_principal_compare   kssl_krb5_principal_compare
 132 #define krb5_decrypt_tkt_part    kssl_krb5_decrypt_tkt_part
 133 #define krb5_timeofday           kssl_krb5_timeofday
 134 #define krb5_rc_default           kssl_krb5_rc_default
 135
 136 #ifdef krb5_rc_initialize
 137 #undef krb5_rc_initialize
 138 #endif
 139 #define krb5_rc_initialize   kssl_krb5_rc_initialize
 140
 141 #ifdef krb5_rc_get_lifespan
 142 #undef krb5_rc_get_lifespan
 143 #endif
 144 #define krb5_rc_get_lifespan kssl_krb5_rc_get_lifespan
 145
 146 #ifdef krb5_rc_destroy
 147 #undef krb5_rc_destroy
 148 #endif
 149 #define krb5_rc_destroy      kssl_krb5_rc_destroy
 150
 151 #define valid_cksumtype      kssl_valid_cksumtype
 152 #define krb5_checksum_size   kssl_krb5_checksum_size
 153 #define krb5_kt_free_entry   kssl_krb5_kt_free_entry
 154 #define krb5_auth_con_setrcache  kssl_krb5_auth_con_setrcache
 155 #define krb5_auth_con_getrcache  kssl_krb5_auth_con_getrcache
 156 #define krb5_get_server_rcache   kssl_krb5_get_server_rcache
 157
 158 /* Prototypes for built in stubs */
 159 void kssl_krb5_free_data_contents(krb5_context, krb5_data *);
 160 void kssl_krb5_free_principal(krb5_context, krb5_principal );
 161 krb5_error_code kssl_krb5_kt_resolve(krb5_context,
 162                                      krb5_const char *,
 163                                      krb5_keytab *);
 164 krb5_error_code kssl_krb5_kt_default(krb5_context,
 165                                      krb5_keytab *);
 166 krb5_error_code kssl_krb5_free_ticket(krb5_context, krb5_ticket *);
 167 krb5_error_code kssl_krb5_rd_req(krb5_context, krb5_auth_context *,
 168                                  krb5_const krb5_data *,
 169                                  krb5_const_principal, krb5_keytab,
 170                                  krb5_flags *,krb5_ticket **);
 171
 172 krb5_boolean kssl_krb5_principal_compare(krb5_context, krb5_const_principal,
 173                                          krb5_const_principal);
 174 krb5_error_code kssl_krb5_mk_req_extended(krb5_context,
 175                                           krb5_auth_context  *,
 176                                           krb5_const krb5_flags,
 177                                           krb5_data  *,
 178                                           krb5_creds  *,
 179                                           krb5_data  * );
 180 krb5_error_code kssl_krb5_init_context(krb5_context *);
 181 void kssl_krb5_free_context(krb5_context);
 182 krb5_error_code kssl_krb5_cc_default(krb5_context,krb5_ccache  *);
 183 krb5_error_code kssl_krb5_sname_to_principal(krb5_context,
 184                                              krb5_const char  *,
 185                                              krb5_const char  *,
 186                                              krb5_int32,
 187                                              krb5_principal  *);
 188 krb5_error_code kssl_krb5_get_credentials(krb5_context,
 189                                           krb5_const krb5_flags,
 190                                           krb5_ccache,
 191                                           krb5_creds  *,
 192                                           krb5_creds  *  *);
 193 krb5_error_code kssl_krb5_auth_con_init(krb5_context,
 194                                         krb5_auth_context  *);
 195 krb5_error_code kssl_krb5_cc_get_principal(krb5_context context,
 196                                            krb5_ccache cache,
 197                                            krb5_principal *principal);
 198 krb5_error_code kssl_krb5_auth_con_free(krb5_context,krb5_auth_context);
 199 size_t kssl_krb5_checksum_size(krb5_context context,krb5_cksumtype ctype);
 200 krb5_boolean kssl_valid_cksumtype(krb5_cksumtype ctype);
 201 krb5_error_code krb5_kt_free_entry(krb5_context,krb5_keytab_entry FAR * );
 202 krb5_error_code kssl_krb5_auth_con_setrcache(krb5_context,
 203                                              krb5_auth_context,
 204                                              krb5_rcache);
 205 krb5_error_code kssl_krb5_get_server_rcache(krb5_context,
 206                                             krb5_const krb5_data *,
 207                                             krb5_rcache *);
 208 krb5_error_code kssl_krb5_auth_con_getrcache(krb5_context,
 209                                              krb5_auth_context,
 210                                              krb5_rcache *);
 211
 212 /* Function pointers (almost all Kerberos functions are _stdcall) */
 213 static void (_stdcall *p_krb5_free_data_contents)(krb5_context, krb5_data *)
 214         =NULL;
 215 static void (_stdcall *p_krb5_free_principal)(krb5_context, krb5_principal )
 216         =NULL;
 217 static krb5_error_code(_stdcall *p_krb5_kt_resolve)
 218                         (krb5_context, krb5_const char *, krb5_keytab *)=NULL;
 219 static krb5_error_code (_stdcall *p_krb5_kt_default)(krb5_context,
 220                                                      krb5_keytab *)=NULL;
 221 static krb5_error_code (_stdcall *p_krb5_free_ticket)(krb5_context,
 222                                                       krb5_ticket *)=NULL;
 223 static krb5_error_code (_stdcall *p_krb5_rd_req)(krb5_context,
 224                                                  krb5_auth_context *,
 225                                                  krb5_const krb5_data *,
 226                                                  krb5_const_principal,
 227                                                  krb5_keytab, krb5_flags *,
 228                                                  krb5_ticket **)=NULL;
 229 static krb5_error_code (_stdcall *p_krb5_mk_req_extended)
 230                         (krb5_context, krb5_auth_context *,
 231                          krb5_const krb5_flags, krb5_data *, krb5_creds *,
 232                          krb5_data * )=NULL;
 233 static krb5_error_code (_stdcall *p_krb5_init_context)(krb5_context *)=NULL;
 234 static void (_stdcall *p_krb5_free_context)(krb5_context)=NULL;
 235 static krb5_error_code (_stdcall *p_krb5_cc_default)(krb5_context,
 236                                                      krb5_ccache  *)=NULL;
 237 static krb5_error_code (_stdcall *p_krb5_sname_to_principal)
 238                         (krb5_context, krb5_const char *, krb5_const char *,
 239                          krb5_int32, krb5_principal *)=NULL;
 240 static krb5_error_code (_stdcall *p_krb5_get_credentials)
 241                         (krb5_context, krb5_const krb5_flags, krb5_ccache,
 242                          krb5_creds *, krb5_creds **)=NULL;
 243 static krb5_error_code (_stdcall *p_krb5_auth_con_init)
 244                         (krb5_context, krb5_auth_context *)=NULL;
 245 static krb5_error_code (_stdcall *p_krb5_cc_get_principal)
 246                         (krb5_context context, krb5_ccache cache,
 247                          krb5_principal *principal)=NULL;
 248 static krb5_error_code (_stdcall *p_krb5_auth_con_free)
 249                         (krb5_context, krb5_auth_context)=NULL;
 250 static krb5_error_code (_stdcall *p_krb5_decrypt_tkt_part)
 251                         (krb5_context, krb5_const krb5_keyblock *,
 252                                            krb5_ticket *)=NULL;
 253 static krb5_error_code (_stdcall *p_krb5_timeofday)
 254                         (krb5_context context, krb5_int32 *timeret)=NULL;
 255 static krb5_error_code (_stdcall *p_krb5_rc_default)
 256                         (krb5_context context, krb5_rcache *rc)=NULL;
 257 static krb5_error_code (_stdcall *p_krb5_rc_initialize)
 258                         (krb5_context context, krb5_rcache rc,
 259                                      krb5_deltat lifespan)=NULL;
 260 static krb5_error_code (_stdcall *p_krb5_rc_get_lifespan)
 261                         (krb5_context context, krb5_rcache rc,
 262                                        krb5_deltat *lifespan)=NULL;
 263 static krb5_error_code (_stdcall *p_krb5_rc_destroy)
 264                         (krb5_context context, krb5_rcache rc)=NULL;
 265 static krb5_boolean (_stdcall *p_krb5_principal_compare)
 266                      (krb5_context, krb5_const_principal, krb5_const_principal)=NULL;
 267 static size_t (_stdcall *p_krb5_checksum_size)(krb5_context context,krb5_cksumtype ctype)=NULL;
 268 static krb5_boolean (_stdcall *p_valid_cksumtype)(krb5_cksumtype ctype)=NULL;
 269 static krb5_error_code (_stdcall *p_krb5_kt_free_entry)
 270                         (krb5_context,krb5_keytab_entry * )=NULL;
 271 static krb5_error_code (_stdcall * p_krb5_auth_con_setrcache)(krb5_context,
 272                                                                krb5_auth_context,
 273                                                                krb5_rcache)=NULL;
 274 static krb5_error_code (_stdcall * p_krb5_get_server_rcache)(krb5_context,
 275                                                               krb5_const krb5_data *,
 276                                                               krb5_rcache *)=NULL;
 277 static krb5_error_code (* p_krb5_auth_con_getrcache)(krb5_context,
 278                                                       krb5_auth_context,
 279                                                       krb5_rcache *)=NULL;
 280 static krb5_error_code (_stdcall * p_krb5_kt_close)(krb5_context context,
 281                                                     krb5_keytab keytab)=NULL;
 282 static krb5_error_code (_stdcall * p_krb5_kt_get_entry)(krb5_context context,
 283                                                         krb5_keytab keytab,
 284                        krb5_const_principal principal, krb5_kvno vno,
 285                        krb5_enctype enctype, krb5_keytab_entry *entry)=NULL;
 286 static int krb5_loaded = 0;     /* only attempt to initialize func ptrs once */
 287
 288 /* Function to Load the Kerberos 5 DLL and initialize function pointers */
 289 void
 290 load_krb5_dll(void)
 291         {
 292         HANDLE hKRB5_32;
 293
 294         krb5_loaded++;
 295         hKRB5_32 = LoadLibrary(TEXT("KRB5_32"));
 296         if (!hKRB5_32)
 297                 return;
 298
 299         (FARPROC) p_krb5_free_data_contents =
 300                 GetProcAddress( hKRB5_32, "krb5_free_data_contents" );
 301         (FARPROC) p_krb5_free_context =
 302                 GetProcAddress( hKRB5_32, "krb5_free_context" );
 303         (FARPROC) p_krb5_auth_con_free =
 304                 GetProcAddress( hKRB5_32, "krb5_auth_con_free" );
 305         (FARPROC) p_krb5_free_principal =
 306                 GetProcAddress( hKRB5_32, "krb5_free_principal" );
 307         (FARPROC) p_krb5_mk_req_extended =
 308                 GetProcAddress( hKRB5_32, "krb5_mk_req_extended" );
 309         (FARPROC) p_krb5_get_credentials =
 310                 GetProcAddress( hKRB5_32, "krb5_get_credentials" );
 311         (FARPROC) p_krb5_cc_get_principal =
 312                 GetProcAddress( hKRB5_32, "krb5_cc_get_principal" );
 313         (FARPROC) p_krb5_cc_default =
 314                 GetProcAddress( hKRB5_32, "krb5_cc_default" );
 315         (FARPROC) p_krb5_sname_to_principal =
 316                 GetProcAddress( hKRB5_32, "krb5_sname_to_principal" );
 317         (FARPROC) p_krb5_init_context =
 318                 GetProcAddress( hKRB5_32, "krb5_init_context" );
 319         (FARPROC) p_krb5_free_ticket =
 320                 GetProcAddress( hKRB5_32, "krb5_free_ticket" );
 321         (FARPROC) p_krb5_rd_req =
 322                 GetProcAddress( hKRB5_32, "krb5_rd_req" );
 323         (FARPROC) p_krb5_principal_compare =
 324                 GetProcAddress( hKRB5_32, "krb5_principal_compare" );
 325         (FARPROC) p_krb5_decrypt_tkt_part =
 326                 GetProcAddress( hKRB5_32, "krb5_decrypt_tkt_part" );
 327         (FARPROC) p_krb5_timeofday =
 328                 GetProcAddress( hKRB5_32, "krb5_timeofday" );
 329         (FARPROC) p_krb5_rc_default =
 330                 GetProcAddress( hKRB5_32, "krb5_rc_default" );
 331         (FARPROC) p_krb5_rc_initialize =
 332                 GetProcAddress( hKRB5_32, "krb5_rc_initialize" );
 333         (FARPROC) p_krb5_rc_get_lifespan =
 334                 GetProcAddress( hKRB5_32, "krb5_rc_get_lifespan" );
 335         (FARPROC) p_krb5_rc_destroy =
 336                 GetProcAddress( hKRB5_32, "krb5_rc_destroy" );
 337         (FARPROC) p_krb5_kt_default =
 338                 GetProcAddress( hKRB5_32, "krb5_kt_default" );
 339         (FARPROC) p_krb5_kt_resolve =
 340                 GetProcAddress( hKRB5_32, "krb5_kt_resolve" );
 341         (FARPROC) p_krb5_auth_con_init =
 342                 GetProcAddress( hKRB5_32, "krb5_auth_con_init" );
 343         (FARPROC) p_valid_cksumtype =
 344                 GetProcAddress( hKRB5_32, "valid_cksumtype" );
 345         (FARPROC) p_krb5_checksum_size =
 346                 GetProcAddress( hKRB5_32, "krb5_checksum_size" );
 347         (FARPROC) p_krb5_kt_free_entry =
 348                 GetProcAddress( hKRB5_32, "krb5_kt_free_entry" );
 349         (FARPROC) p_krb5_auth_con_setrcache =
 350                 GetProcAddress( hKRB5_32, "krb5_auth_con_setrcache" );
 351         (FARPROC) p_krb5_get_server_rcache =
 352                 GetProcAddress( hKRB5_32, "krb5_get_server_rcache" );
 353         (FARPROC) p_krb5_auth_con_getrcache =
 354                 GetProcAddress( hKRB5_32, "krb5_auth_con_getrcache" );
 355         (FARPROC) p_krb5_kt_close =
 356                 GetProcAddress( hKRB5_32, "krb5_kt_close" );
 357         (FARPROC) p_krb5_kt_get_entry =
 358                 GetProcAddress( hKRB5_32, "krb5_kt_get_entry" );
 359         }
 360
 361 /* Stubs for each function to be dynamicly loaded */
 362 void
 363 kssl_krb5_free_data_contents(krb5_context CO, krb5_data  * data)
 364         {
 365         if (!krb5_loaded)
 366                 load_krb5_dll();
 367
 368         if ( p_krb5_free_data_contents )
 369                 p_krb5_free_data_contents(CO,data);
 370         }
 371
 372 krb5_error_code
 373 kssl_krb5_mk_req_extended (krb5_context CO,
 374                           krb5_auth_context  * pACO,
 375                           krb5_const krb5_flags F,
 376                           krb5_data  * pD1,
 377                           krb5_creds  * pC,
 378                           krb5_data  * pD2)
 379         {
 380         if (!krb5_loaded)
 381                 load_krb5_dll();
 382
 383         if ( p_krb5_mk_req_extended )
 384                 return(p_krb5_mk_req_extended(CO,pACO,F,pD1,pC,pD2));
 385         else
 386                 return KRB5KRB_ERR_GENERIC;
 387         }
 388 krb5_error_code
 389 kssl_krb5_auth_con_init(krb5_context CO,
 390                        krb5_auth_context  * pACO)
 391         {
 392         if (!krb5_loaded)
 393                 load_krb5_dll();
 394
 395         if ( p_krb5_auth_con_init )
 396                 return(p_krb5_auth_con_init(CO,pACO));
 397         else
 398                 return KRB5KRB_ERR_GENERIC;
 399         }
 400 krb5_error_code
 401 kssl_krb5_auth_con_free (krb5_context CO,
 402                         krb5_auth_context ACO)
 403         {
 404         if (!krb5_loaded)
 405                 load_krb5_dll();
 406
 407         if ( p_krb5_auth_con_free )
 408                 return(p_krb5_auth_con_free(CO,ACO));
 409         else
 410                 return KRB5KRB_ERR_GENERIC;
 411         }
 412 krb5_error_code
 413 kssl_krb5_get_credentials(krb5_context CO,
 414                          krb5_const krb5_flags F,
 415                          krb5_ccache CC,
 416                          krb5_creds  * pCR,
 417                          krb5_creds  ** ppCR)
 418         {
 419         if (!krb5_loaded)
 420                 load_krb5_dll();
 421
 422         if ( p_krb5_get_credentials )
 423                 return(p_krb5_get_credentials(CO,F,CC,pCR,ppCR));
 424         else
 425                 return KRB5KRB_ERR_GENERIC;
 426         }
 427 krb5_error_code
 428 kssl_krb5_sname_to_principal(krb5_context CO,
 429                             krb5_const char  * pC1,
 430                             krb5_const char  * pC2,
 431                             krb5_int32 I,
 432                             krb5_principal  * pPR)
 433         {
 434         if (!krb5_loaded)
 435                 load_krb5_dll();
 436
 437         if ( p_krb5_sname_to_principal )
 438                 return(p_krb5_sname_to_principal(CO,pC1,pC2,I,pPR));
 439         else
 440                 return KRB5KRB_ERR_GENERIC;
 441         }
 442
 443 krb5_error_code
 444 kssl_krb5_cc_default(krb5_context CO,
 445                     krb5_ccache  * pCC)
 446         {
 447         if (!krb5_loaded)
 448                 load_krb5_dll();
 449
 450         if ( p_krb5_cc_default )
 451                 return(p_krb5_cc_default(CO,pCC));
 452         else
 453                 return KRB5KRB_ERR_GENERIC;
 454         }
 455
 456 krb5_error_code
 457 kssl_krb5_init_context(krb5_context * pCO)
 458         {
 459         if (!krb5_loaded)
 460                 load_krb5_dll();
 461
 462         if ( p_krb5_init_context )
 463                 return(p_krb5_init_context(pCO));
 464         else
 465                 return KRB5KRB_ERR_GENERIC;
 466         }
 467
 468 void
 469 kssl_krb5_free_context(krb5_context CO)
 470         {
 471         if (!krb5_loaded)
 472                 load_krb5_dll();
 473
 474         if ( p_krb5_free_context )
 475                 p_krb5_free_context(CO);
 476         }
 477
 478 void
 479 kssl_krb5_free_principal(krb5_context c, krb5_principal p)
 480         {
 481         if (!krb5_loaded)
 482                 load_krb5_dll();
 483
 484         if ( p_krb5_free_principal )
 485                 p_krb5_free_principal(c,p);
 486         }
 487
 488 krb5_error_code
 489 kssl_krb5_kt_resolve(krb5_context con,
 490                     krb5_const char * sz,
 491                     krb5_keytab * kt)
 492         {
 493         if (!krb5_loaded)
 494                 load_krb5_dll();
 495
 496         if ( p_krb5_kt_resolve )
 497                 return(p_krb5_kt_resolve(con,sz,kt));
 498         else
 499                 return KRB5KRB_ERR_GENERIC;
 500         }
 501
 502 krb5_error_code
 503 kssl_krb5_kt_default(krb5_context con,
 504                     krb5_keytab * kt)
 505         {
 506         if (!krb5_loaded)
 507                 load_krb5_dll();
 508
 509         if ( p_krb5_kt_default )
 510                 return(p_krb5_kt_default(con,kt));
 511         else
 512                 return KRB5KRB_ERR_GENERIC;
 513         }
 514
 515 krb5_error_code
 516 kssl_krb5_free_ticket(krb5_context con,
 517                      krb5_ticket * kt)
 518         {
 519         if (!krb5_loaded)
 520                 load_krb5_dll();
 521
 522         if ( p_krb5_free_ticket )
 523                 return(p_krb5_free_ticket(con,kt));
 524         else
 525                 return KRB5KRB_ERR_GENERIC;
 526         }
 527
 528 krb5_error_code
 529 kssl_krb5_rd_req(krb5_context con, krb5_auth_context * pacon,
 530                 krb5_const krb5_data * data,
 531                 krb5_const_principal princ, krb5_keytab keytab,
 532                 krb5_flags * flags, krb5_ticket ** pptkt)
 533         {
 534         if (!krb5_loaded)
 535                 load_krb5_dll();
 536
 537         if ( p_krb5_rd_req )
 538                 return(p_krb5_rd_req(con,pacon,data,princ,keytab,flags,pptkt));
 539         else
 540                 return KRB5KRB_ERR_GENERIC;
 541         }
 542
 543 krb5_boolean
 544 krb5_principal_compare(krb5_context con, krb5_const_principal princ1,
 545                 krb5_const_principal princ2)
 546         {
 547         if (!krb5_loaded)
 548                 load_krb5_dll();
 549
 550         if ( p_krb5_principal_compare )
 551                 return(p_krb5_principal_compare(con,princ1,princ2));
 552         else
 553                 return KRB5KRB_ERR_GENERIC;
 554         }
 555
 556 krb5_error_code
 557 krb5_decrypt_tkt_part(krb5_context con, krb5_const krb5_keyblock *keys,
 558                 krb5_ticket *ticket)
 559         {
 560         if (!krb5_loaded)
 561                 load_krb5_dll();
 562
 563         if ( p_krb5_decrypt_tkt_part )
 564                 return(p_krb5_decrypt_tkt_part(con,keys,ticket));
 565         else
 566                 return KRB5KRB_ERR_GENERIC;
 567         }
 568
 569 krb5_error_code
 570 krb5_timeofday(krb5_context con, krb5_int32 *timeret)
 571         {
 572         if (!krb5_loaded)
 573                 load_krb5_dll();
 574
 575         if ( p_krb5_timeofday )
 576                 return(p_krb5_timeofday(con,timeret));
 577         else
 578                 return KRB5KRB_ERR_GENERIC;
 579         }
 580
 581 krb5_error_code
 582 krb5_rc_default(krb5_context con, krb5_rcache *rc)
 583         {
 584         if (!krb5_loaded)
 585                 load_krb5_dll();
 586
 587         if ( p_krb5_rc_default )
 588                 return(p_krb5_rc_default(con,rc));
 589         else
 590                 return KRB5KRB_ERR_GENERIC;
 591         }
 592
 593 krb5_error_code
 594 krb5_rc_initialize(krb5_context con, krb5_rcache rc, krb5_deltat lifespan)
 595         {
 596         if (!krb5_loaded)
 597                 load_krb5_dll();
 598
 599         if ( p_krb5_rc_initialize )
 600                 return(p_krb5_rc_initialize(con, rc, lifespan));
 601         else
 602                 return KRB5KRB_ERR_GENERIC;
 603         }
 604
 605 krb5_error_code
 606 krb5_rc_get_lifespan(krb5_context con, krb5_rcache rc, krb5_deltat *lifespanp)
 607         {
 608         if (!krb5_loaded)
 609                 load_krb5_dll();
 610
 611         if ( p_krb5_rc_get_lifespan )
 612                 return(p_krb5_rc_get_lifespan(con, rc, lifespanp));
 613         else
 614                 return KRB5KRB_ERR_GENERIC;
 615         }
 616
 617 krb5_error_code
 618 krb5_rc_destroy(krb5_context con, krb5_rcache rc)
 619         {
 620         if (!krb5_loaded)
 621                 load_krb5_dll();
 622
 623         if ( p_krb5_rc_destroy )
 624                 return(p_krb5_rc_destroy(con, rc));
 625         else
 626                 return KRB5KRB_ERR_GENERIC;
 627         }
 628
 629 size_t
 630 krb5_checksum_size(krb5_context context,krb5_cksumtype ctype)
 631         {
 632         if (!krb5_loaded)
 633                 load_krb5_dll();
 634
 635         if ( p_krb5_checksum_size )
 636                 return(p_krb5_checksum_size(context, ctype));
 637         else
 638                 return KRB5KRB_ERR_GENERIC;
 639         }
 640
 641 krb5_boolean
 642 valid_cksumtype(krb5_cksumtype ctype)
 643         {
 644         if (!krb5_loaded)
 645                 load_krb5_dll();
 646
 647         if ( p_valid_cksumtype )
 648                 return(p_valid_cksumtype(ctype));
 649         else
 650                 return KRB5KRB_ERR_GENERIC;
 651         }
 652
 653 krb5_error_code
 654 krb5_kt_free_entry(krb5_context con,krb5_keytab_entry * entry)
 655         {
 656         if (!krb5_loaded)
 657                 load_krb5_dll();
 658
 659         if ( p_krb5_kt_free_entry )
 660                 return(p_krb5_kt_free_entry(con,entry));
 661         else
 662                 return KRB5KRB_ERR_GENERIC;
 663         }
 664
 665 /* Structure definitions  */
 666 #ifndef NO_DEF_KRB5_CCACHE
 667 #ifndef krb5_x
 668 #define krb5_x(ptr,args) ((ptr)?((*(ptr)) args):(abort(),1))
 669 #define krb5_xc(ptr,args) ((ptr)?((*(ptr)) args):(abort(),(char*)0))
 670 #endif
 671
 672 typedef krb5_pointer    krb5_cc_cursor; /* cursor for sequential lookup */
 673
 674 typedef struct _krb5_ccache
 675         {
 676         krb5_magic magic;
 677         struct _krb5_cc_ops FAR *ops;
 678         krb5_pointer data;
 679         } *krb5_ccache;
 680
 681 typedef struct _krb5_cc_ops
 682         {
 683         krb5_magic magic;
 684         char  *prefix;
 685         char  * (KRB5_CALLCONV *get_name)
 686                 (krb5_context, krb5_ccache);
 687         krb5_error_code (KRB5_CALLCONV *resolve)
 688                 (krb5_context, krb5_ccache  *, const char  *);
 689         krb5_error_code (KRB5_CALLCONV *gen_new)
 690                 (krb5_context, krb5_ccache  *);
 691         krb5_error_code (KRB5_CALLCONV *init)
 692                 (krb5_context, krb5_ccache, krb5_principal);
 693         krb5_error_code (KRB5_CALLCONV *destroy)
 694                 (krb5_context, krb5_ccache);
 695         krb5_error_code (KRB5_CALLCONV *close)
 696                 (krb5_context, krb5_ccache);
 697         krb5_error_code (KRB5_CALLCONV *store)
 698                 (krb5_context, krb5_ccache, krb5_creds  *);
 699         krb5_error_code (KRB5_CALLCONV *retrieve)
 700                 (krb5_context, krb5_ccache,
 701                 krb5_flags, krb5_creds  *, krb5_creds  *);
 702         krb5_error_code (KRB5_CALLCONV *get_princ)
 703                 (krb5_context, krb5_ccache, krb5_principal  *);
 704         krb5_error_code (KRB5_CALLCONV *get_first)
 705                 (krb5_context, krb5_ccache, krb5_cc_cursor  *);
 706         krb5_error_code (KRB5_CALLCONV *get_next)
 707                 (krb5_context, krb5_ccache,
 708                 krb5_cc_cursor  *, krb5_creds  *);
 709         krb5_error_code (KRB5_CALLCONV *end_get)
 710                 (krb5_context, krb5_ccache, krb5_cc_cursor  *);
 711         krb5_error_code (KRB5_CALLCONV *remove_cred)
 712                 (krb5_context, krb5_ccache,
 713                 krb5_flags, krb5_creds  *);
 714         krb5_error_code (KRB5_CALLCONV *set_flags)
 715                 (krb5_context, krb5_ccache, krb5_flags);
 716         } krb5_cc_ops;
 717 #endif /* NO_DEF_KRB5_CCACHE */
 718
 719 krb5_error_code
 720 kssl_krb5_cc_get_principal
 721     (krb5_context context, krb5_ccache cache,
 722       krb5_principal *principal)
 723         {
 724         if ( p_krb5_cc_get_principal )
 725                 return(p_krb5_cc_get_principal(context,cache,principal));
 726         else
 727                 return(krb5_x
 728                         ((cache)->ops->get_princ,(context, cache, principal)));
 729         }
 730
 731 krb5_error_code
 732 kssl_krb5_auth_con_setrcache(krb5_context con, krb5_auth_context acon,
 733                              krb5_rcache rcache)
 734         {
 735         if ( p_krb5_auth_con_setrcache )
 736                  return(p_krb5_auth_con_setrcache(con,acon,rcache));
 737         else
 738                  return KRB5KRB_ERR_GENERIC;
 739         }
 740
 741 krb5_error_code
 742 kssl_krb5_get_server_rcache(krb5_context con, krb5_const krb5_data * data,
 743                             krb5_rcache * rcache)
 744         {
 745         if ( p_krb5_get_server_rcache )
 746                 return(p_krb5_get_server_rcache(con,data,rcache));
 747         else
 748                 return KRB5KRB_ERR_GENERIC;
 749         }
 750
 751 krb5_error_code
 752 kssl_krb5_auth_con_getrcache(krb5_context con, krb5_auth_context acon,
 753                              krb5_rcache * prcache)
 754         {
 755         if ( p_krb5_auth_con_getrcache )
 756                 return(p_krb5_auth_con_getrcache(con,acon, prcache));
 757         else
 758                 return KRB5KRB_ERR_GENERIC;
 759         }
 760
 761 krb5_error_code
 762 kssl_krb5_kt_close(krb5_context context, krb5_keytab keytab)
 763         {
 764         if ( p_krb5_kt_close )
 765                 return(p_krb5_kt_close(context,keytab));
 766         else
 767                 return KRB5KRB_ERR_GENERIC;
 768         }
 769
 770 krb5_error_code
 771 kssl_krb5_kt_get_entry(krb5_context context, krb5_keytab keytab,
 772                        krb5_const_principal principal, krb5_kvno vno,
 773                        krb5_enctype enctype, krb5_keytab_entry *entry)
 774         {
 775         if ( p_krb5_kt_get_entry )
 776                 return(p_krb5_kt_get_entry(context,keytab,principal,vno,enctype,entry));
 777         else
 778                 return KRB5KRB_ERR_GENERIC;
 779         }
 780 #endif  /* OPENSSL_SYS_WINDOWS || OPENSSL_SYS_WIN32 */
 781
 782
 783 /* memory allocation functions for non-temporary storage
 784  * (e.g. stuff that gets saved into the kssl context) */
 785 static void* kssl_calloc(size_t nmemb, size_t size)
 786 {
 787         void* p;
 788
 789         p=OPENSSL_malloc(nmemb*size);
 790         if (p){
 791                 memset(p, 0, nmemb*size);
 792         }
 793         return p;
 794 }
 795
 796 #define kssl_malloc(size) OPENSSL_malloc((size))
 797 #define kssl_realloc(ptr, size) OPENSSL_realloc(ptr, size)
 798 #define kssl_free(ptr) OPENSSL_free((ptr))
 799
 800
 801 char
 802 *kstring(char *string)
 803         {
 804         static char     *null = "[NULL]";
 805
 806         return ((string == NULL)? null: string);
 807         }
 808
 809 /*      Given KRB5 enctype (basically DES or 3DES),
 810 **      return closest match openssl EVP_ encryption algorithm.
 811 **      Return NULL for unknown or problematic (krb5_dk_encrypt) enctypes.
 812 **      Assume ENCTYPE_*_RAW (krb5_raw_encrypt) are OK.
 813 */
 814 const EVP_CIPHER *
 815 kssl_map_enc(krb5_enctype enctype)
 816         {
 817         switch (enctype)
 818                 {
 819         case ENCTYPE_DES_HMAC_SHA1:             /*    EVP_des_cbc();       */
 820         case ENCTYPE_DES_CBC_CRC:
 821         case ENCTYPE_DES_CBC_MD4:
 822         case ENCTYPE_DES_CBC_MD5:
 823         case ENCTYPE_DES_CBC_RAW:
 824                                 return EVP_des_cbc();
 825                                 break;
 826         case ENCTYPE_DES3_CBC_SHA1:             /*    EVP_des_ede3_cbc();  */
 827         case ENCTYPE_DES3_CBC_SHA:
 828         case ENCTYPE_DES3_CBC_RAW:
 829                                 return EVP_des_ede3_cbc();
 830                                 break;
 831         default:                return NULL;
 832                                 break;
 833                 }
 834         }
 835
 836
 837 /*      Return true:1 if p "looks like" the start of the real authenticator
 838 **      described in kssl_skip_confound() below.  The ASN.1 pattern is
 839 **      "62 xx 30 yy" (APPLICATION-2, SEQUENCE), where xx-yy =~ 2, and
 840 **      xx and yy are possibly multi-byte length fields.
 841 */
 842 int     kssl_test_confound(unsigned char *p)
 843         {
 844         int     len = 2;
 845         int     xx = 0, yy = 0;
 846
 847         if (*p++ != 0x62)  return 0;
 848         if (*p > 0x82)  return 0;
 849         switch(*p)  {
 850                 case 0x82:  p++;          xx = (*p++ << 8);  xx += *p++;  break;
 851                 case 0x81:  p++;          xx =  *p++;  break;
 852                 case 0x80:  return 0;
 853                 default:    xx = *p++;  break;
 854                 }
 855         if (*p++ != 0x30)  return 0;
 856         if (*p > 0x82)  return 0;
 857         switch(*p)  {
 858                 case 0x82:  p++; len+=2;  yy = (*p++ << 8);  yy += *p++;  break;
 859                 case 0x81:  p++; len++;   yy =  *p++;  break;
 860                 case 0x80:  return 0;
 861                 default:    yy = *p++;  break;
 862                 }
 863
 864         return (xx - len == yy)? 1: 0;
 865         }
 866
 867 /*      Allocate, fill, and return cksumlens array of checksum lengths.
 868 **      This array holds just the unique elements from the krb5_cksumarray[].
 869 **      array[n] == 0 signals end of data.
 870 **
 871 **      The krb5_cksumarray[] was an internal variable that has since been
 872 **      replaced by a more general method for storing the data.  It should
 873 **      not be used.  Instead we use real API calls and make a guess for
 874 **      what the highest assigned CKSUMTYPE_ constant is.  As of 1.2.2
 875 **      it is 0x000c (CKSUMTYPE_HMAC_SHA1_DES3).  So we will use 0x0010.
 876 */
 877 size_t  *populate_cksumlens(void)
 878         {
 879         int             i, j, n;
 880         static size_t   *cklens = NULL;
 881
 882 #ifdef KRB5_MIT_OLD11
 883         n = krb5_max_cksum;
 884 #else
 885         n = 0x0010;
 886 #endif  /* KRB5_MIT_OLD11 */
 887
 888 #ifdef KRB5CHECKAUTH
 889         if (!cklens && !(cklens = (size_t *) calloc(sizeof(int),n+1)))  return NULL;
 890
 891         for (i=0; i < n; i++)  {
 892                 if (!valid_cksumtype(i))  continue;     /*  array has holes  */
 893                 for (j=0; j < n; j++)  {
 894                         if (cklens[j] == 0)  {
 895                                 cklens[j] = krb5_checksum_size(NULL,i);
 896                                 break;          /*  krb5 elem was new: add   */
 897                                 }
 898                         if (cklens[j] == krb5_checksum_size(NULL,i))  {
 899                                 break;          /*  ignore duplicate elements */
 900                                 }
 901                         }
 902                 }
 903 #endif  /* KRB5CHECKAUTH */
 904
 905         return cklens;
 906         }
 907
 908 /*      Return pointer to start of real authenticator within authenticator, or
 909 **      return NULL on error.
 910 **      Decrypted authenticator looks like this:
 911 **              [0 or 8 byte confounder] [4-24 byte checksum] [real authent'r]
 912 **      This hackery wouldn't be necessary if MIT KRB5 1.0.6 had the
 913 **      krb5_auth_con_getcksumtype() function advertised in its krb5.h.
 914 */
 915 unsigned char   *kssl_skip_confound(krb5_enctype etype, unsigned char *a)
 916         {
 917         int             i, conlen;
 918         size_t          cklen;
 919         static size_t   *cksumlens = NULL;
 920         unsigned char   *test_auth;
 921
 922         conlen = (etype)? 8: 0;
 923
 924         if (!cksumlens  &&  !(cksumlens = populate_cksumlens()))  return NULL;
 925         for (i=0; (cklen = cksumlens[i]) != 0; i++)
 926                 {
 927                 test_auth = a + conlen + cklen;
 928                 if (kssl_test_confound(test_auth))  return test_auth;
 929                 }
 930
 931         return NULL;
 932         }
 933
 934
 935 /*      Set kssl_err error info when reason text is a simple string
 936 **              kssl_err = struct { int reason; char text[KSSL_ERR_MAX+1]; }
 937 */
 938 void
 939 kssl_err_set(KSSL_ERR *kssl_err, int reason, char *text)
 940         {
 941         if (kssl_err == NULL)  return;
 942
 943         kssl_err->reason = reason;
 944         BIO_snprintf(kssl_err->text, KSSL_ERR_MAX, "%s", text);
 945         return;
 946         }
 947
 948
 949 /*      Display contents of krb5_data struct, for debugging
 950 */
 951 void
 952 print_krb5_data(char *label, krb5_data *kdata)
 953         {
 954         int i;
 955
 956         printf("%s[%d] ", label, kdata->length);
 957         for (i=0; i < (int)kdata->length; i++)
 958                 {
 959                 if (0 &&  isprint((int) kdata->data[i]))
 960                         printf( "%c ",  kdata->data[i]);
 961                 else
 962                         printf( "%02x ", (unsigned char) kdata->data[i]);
 963                 }
 964         printf("\n");
 965         }
 966
 967
 968 /*      Display contents of krb5_authdata struct, for debugging
 969 */
 970 void
 971 print_krb5_authdata(char *label, krb5_authdata **adata)
 972         {
 973         if (adata == NULL)
 974                 {
 975                 printf("%s, authdata==0\n", label);
 976                 return;
 977                 }
 978         printf("%s [%p]\n", label, (void *)adata);
 979 #if 0
 980         {
 981         int     i;
 982         printf("%s[at%d:%d] ", label, adata->ad_type, adata->length);
 983         for (i=0; i < adata->length; i++)
 984                 {
 985                 printf((isprint(adata->contents[i]))? "%c ": "%02x",
 986                         adata->contents[i]);
 987                 }
 988         printf("\n");
 989         }
 990 #endif
 991         }
 992
 993
 994 /*      Display contents of krb5_keyblock struct, for debugging
 995 */
 996 void
 997 print_krb5_keyblock(char *label, krb5_keyblock *keyblk)
 998         {
 999         int i;
1000
1001         if (keyblk == NULL)
1002                 {
1003                 printf("%s, keyblk==0\n", label);
1004                 return;
1005                 }
1006 #ifdef KRB5_HEIMDAL
1007         printf("%s\n\t[et%d:%d]: ", label, keyblk->keytype,
1008                                            keyblk->keyvalue->length);
1009         for (i=0; i < (int)keyblk->keyvalue->length; i++)
1010                 {
1011                 printf("%02x",(unsigned char *)(keyblk->keyvalue->contents)[i]);
1012                 }
1013         printf("\n");
1014 #else
1015         printf("%s\n\t[et%d:%d]: ", label, keyblk->enctype, keyblk->length);
1016         for (i=0; i < (int)keyblk->length; i++)
1017                 {
1018                 printf("%02x",keyblk->contents[i]);
1019                 }
1020         printf("\n");
1021 #endif
1022         }
1023
1024
1025 /*      Display contents of krb5_principal_data struct, for debugging
1026 **      (krb5_principal is typedef'd == krb5_principal_data *)
1027 */
1028 void
1029 print_krb5_princ(char *label, krb5_principal_data *princ)
1030         {
1031         int i, ui, uj;
1032
1033         printf("%s principal Realm: ", label);
1034         if (princ == NULL)  return;
1035         for (ui=0; ui < (int)princ->realm.length; ui++)  putchar(princ->realm.data[ui]);
1036         printf(" (nametype %d) has %d strings:\n", princ->type,princ->length);
1037         for (i=0; i < (int)princ->length; i++)
1038                 {
1039                 printf("\t%d [%d]: ", i, princ->data[i].length);
1040                 for (uj=0; uj < (int)princ->data[i].length; uj++)  {
1041                         putchar(princ->data[i].data[uj]);
1042                         }
1043                 printf("\n");
1044                 }
1045         return;
1046         }
1047
1048
1049 /*      Given krb5 service (typically "kssl") and hostname in kssl_ctx,
1050 **      Return encrypted Kerberos ticket for service @ hostname.
1051 **      If authenp is non-NULL, also return encrypted authenticator,
1052 **      whose data should be freed by caller.
1053 **      (Originally was: Create Kerberos AP_REQ message for SSL Client.)
1054 **
1055 **      19990628        VRS     Started; Returns Kerberos AP_REQ message.
1056 **      20010409        VRS     Modified for RFC2712; Returns enc tkt.
1057 **      20010606        VRS     May also return optional authenticator.
1058 */
1059 krb5_error_code
1060 kssl_cget_tkt(  /* UPDATE */    KSSL_CTX *kssl_ctx,
1061                 /* OUT    */    krb5_data **enc_ticketp,
1062                 /* UPDATE */    krb5_data *authenp,
1063                 /* OUT    */    KSSL_ERR *kssl_err)
1064         {
1065         krb5_error_code         krb5rc = KRB5KRB_ERR_GENERIC;
1066         krb5_context            krb5context = NULL;
1067         krb5_auth_context       krb5auth_context = NULL;
1068         krb5_ccache             krb5ccdef = NULL;
1069         krb5_creds              krb5creds, *krb5credsp = NULL;
1070         krb5_data               krb5_app_req;
1071
1072         kssl_err_set(kssl_err, 0, "");
1073         memset((char *)&krb5creds, 0, sizeof(krb5creds));
1074
1075         if (!kssl_ctx)
1076                 {
1077                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1078                         "No kssl_ctx defined.\n");
1079                 goto err;
1080                 }
1081         else if (!kssl_ctx->service_host)
1082                 {
1083                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1084                         "kssl_ctx service_host undefined.\n");
1085                 goto err;
1086                 }
1087
1088         if ((krb5rc = krb5_init_context(&krb5context)) != 0)
1089                 {
1090                 BIO_snprintf(kssl_err->text,KSSL_ERR_MAX,
1091                         "krb5_init_context() fails: %d\n", krb5rc);
1092                 kssl_err->reason = SSL_R_KRB5_C_INIT;
1093                 goto err;
1094                 }
1095
1096         if ((krb5rc = krb5_sname_to_principal(krb5context,
1097                 kssl_ctx->service_host,
1098                 (kssl_ctx->service_name)? kssl_ctx->service_name: KRB5SVC,
1099                 KRB5_NT_SRV_HST, &krb5creds.server)) != 0)
1100                 {
1101                 BIO_snprintf(kssl_err->text,KSSL_ERR_MAX,
1102                         "krb5_sname_to_principal() fails for %s/%s\n",
1103                         kssl_ctx->service_host,
1104                         (kssl_ctx->service_name)? kssl_ctx->service_name:
1105                                                   KRB5SVC);
1106                 kssl_err->reason = SSL_R_KRB5_C_INIT;
1107                 goto err;
1108                 }
1109
1110         if ((krb5rc = krb5_cc_default(krb5context, &krb5ccdef)) != 0)
1111                 {
1112                 kssl_err_set(kssl_err, SSL_R_KRB5_C_CC_PRINC,
1113                         "krb5_cc_default fails.\n");
1114                 goto err;
1115                 }
1116
1117         if ((krb5rc = krb5_cc_get_principal(krb5context, krb5ccdef,
1118                 &krb5creds.client)) != 0)
1119                 {
1120                 kssl_err_set(kssl_err, SSL_R_KRB5_C_CC_PRINC,
1121                         "krb5_cc_get_principal() fails.\n");
1122                 goto err;
1123                 }
1124
1125         if ((krb5rc = krb5_get_credentials(krb5context, 0, krb5ccdef,
1126                 &krb5creds, &krb5credsp)) != 0)
1127                 {
1128                 kssl_err_set(kssl_err, SSL_R_KRB5_C_GET_CRED,
1129                         "krb5_get_credentials() fails.\n");
1130                 goto err;
1131                 }
1132
1133         *enc_ticketp = &krb5credsp->ticket;
1134 #ifdef KRB5_HEIMDAL
1135         kssl_ctx->enctype = krb5credsp->session.keytype;
1136 #else
1137         kssl_ctx->enctype = krb5credsp->keyblock.enctype;
1138 #endif
1139
1140         krb5rc = KRB5KRB_ERR_GENERIC;
1141         /*      caller should free data of krb5_app_req  */
1142         /*  20010406 VRS deleted for real KerberosWrapper
1143         **  20010605 VRS reinstated to offer Authenticator to KerberosWrapper
1144         */
1145         krb5_app_req.length = 0;
1146         if (authenp)
1147                 {
1148                 krb5_data       krb5in_data;
1149                 const unsigned char     *p;
1150                 long            arlen;
1151                 KRB5_APREQBODY  *ap_req;
1152
1153                 authenp->length = 0;
1154                 krb5in_data.data = NULL;
1155                 krb5in_data.length = 0;
1156                 if ((krb5rc = krb5_mk_req_extended(krb5context,
1157                         &krb5auth_context, 0, &krb5in_data, krb5credsp,
1158                         &krb5_app_req)) != 0)
1159                         {
1160                         kssl_err_set(kssl_err, SSL_R_KRB5_C_MK_REQ,
1161                                 "krb5_mk_req_extended() fails.\n");
1162                         goto err;
1163                         }
1164
1165                 arlen = krb5_app_req.length;
1166                 p = (unsigned char *)krb5_app_req.data;
1167                 ap_req = (KRB5_APREQBODY *) d2i_KRB5_APREQ(NULL, &p, arlen);
1168                 if (ap_req)
1169                         {
1170                         authenp->length = i2d_KRB5_ENCDATA(
1171                                         ap_req->authenticator, NULL);
1172                         if (authenp->length  &&
1173                                 (authenp->data = malloc(authenp->length)))
1174                                 {
1175                                 unsigned char   *adp = (unsigned char *)authenp->data;
1176                                 authenp->length = i2d_KRB5_ENCDATA(
1177                                                 ap_req->authenticator, &adp);
1178                                 }
1179                         }
1180
1181                 if (ap_req)  KRB5_APREQ_free((KRB5_APREQ *) ap_req);
1182                 if (krb5_app_req.length)
1183                         kssl_krb5_free_data_contents(krb5context,&krb5_app_req);
1184                 }
1185 #ifdef KRB5_HEIMDAL
1186         if (kssl_ctx_setkey(kssl_ctx, &krb5credsp->session))
1187                 {
1188                 kssl_err_set(kssl_err, SSL_R_KRB5_C_INIT,
1189                         "kssl_ctx_setkey() fails.\n");
1190                 }
1191 #else
1192         if (kssl_ctx_setkey(kssl_ctx, &krb5credsp->keyblock))
1193                 {
1194                 kssl_err_set(kssl_err, SSL_R_KRB5_C_INIT,
1195                         "kssl_ctx_setkey() fails.\n");
1196                 }
1197 #endif
1198         else    krb5rc = 0;
1199
1200  err:
1201 #ifdef KSSL_DEBUG
1202         kssl_ctx_show(kssl_ctx);
1203 #endif  /* KSSL_DEBUG */
1204
1205         if (krb5creds.client)   krb5_free_principal(krb5context,
1206                                                         krb5creds.client);
1207         if (krb5creds.server)   krb5_free_principal(krb5context,
1208                                                         krb5creds.server);
1209         if (krb5auth_context)   krb5_auth_con_free(krb5context,
1210                                                         krb5auth_context);
1211         if (krb5context)        krb5_free_context(krb5context);
1212         return (krb5rc);
1213         }
1214
1215
1216 /*  Given d2i_-decoded asn1ticket, allocate and return a new krb5_ticket.
1217 **  Return Kerberos error code and kssl_err struct on error.
1218 **  Allocates krb5_ticket and krb5_principal; caller should free these.
1219 **
1220 **      20010410        VRS     Implemented krb5_decode_ticket() as
1221 **                              old_krb5_decode_ticket(). Missing from MIT1.0.6.
1222 **      20010615        VRS     Re-cast as openssl/asn1 d2i_*() functions.
1223 **                              Re-used some of the old krb5_decode_ticket()
1224 **                              code here.  This tkt should alloc/free just
1225 **                              like the real thing.
1226 */
1227 krb5_error_code
1228 kssl_TKT2tkt(   /* IN     */    krb5_context    krb5context,
1229                 /* IN     */    KRB5_TKTBODY    *asn1ticket,
1230                 /* OUT    */    krb5_ticket     **krb5ticket,
1231                 /* OUT    */    KSSL_ERR *kssl_err  )
1232         {
1233         krb5_error_code                 krb5rc = KRB5KRB_ERR_GENERIC;
1234         krb5_ticket                     *new5ticket = NULL;
1235         ASN1_GENERALSTRING              *gstr_svc, *gstr_host;
1236
1237         *krb5ticket = NULL;
1238
1239         if (asn1ticket == NULL  ||  asn1ticket->realm == NULL  ||
1240                 asn1ticket->sname == NULL  ||
1241                 sk_ASN1_GENERALSTRING_num(asn1ticket->sname->namestring) < 2)
1242                 {
1243                 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1244                         "Null field in asn1ticket.\n");
1245                 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1246                 return KRB5KRB_ERR_GENERIC;
1247                 }
1248
1249         if ((new5ticket = (krb5_ticket *) calloc(1, sizeof(krb5_ticket)))==NULL)
1250                 {
1251                 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1252                         "Unable to allocate new krb5_ticket.\n");
1253                 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1254                 return ENOMEM;          /*  or  KRB5KRB_ERR_GENERIC;    */
1255                 }
1256
1257         gstr_svc  = sk_ASN1_GENERALSTRING_value(asn1ticket->sname->namestring, 0);
1258         gstr_host = sk_ASN1_GENERALSTRING_value(asn1ticket->sname->namestring, 1);
1259
1260         if ((krb5rc = kssl_build_principal_2(krb5context,
1261                         &new5ticket->server,
1262                         asn1ticket->realm->length, (char *)asn1ticket->realm->data,
1263                         gstr_svc->length,  (char *)gstr_svc->data,
1264                         gstr_host->length, (char *)gstr_host->data)) != 0)
1265                 {
1266                 free(new5ticket);
1267                 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1268                         "Error building ticket server principal.\n");
1269                 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1270                 return krb5rc;          /*  or  KRB5KRB_ERR_GENERIC;    */
1271                 }
1272
1273         krb5_princ_type(krb5context, new5ticket->server) =
1274                         asn1ticket->sname->nametype->data[0];
1275         new5ticket->enc_part.enctype = asn1ticket->encdata->etype->data[0];
1276         new5ticket->enc_part.kvno = asn1ticket->encdata->kvno->data[0];
1277         new5ticket->enc_part.ciphertext.length =
1278                         asn1ticket->encdata->cipher->length;
1279         if ((new5ticket->enc_part.ciphertext.data =
1280                 calloc(1, asn1ticket->encdata->cipher->length)) == NULL)
1281                 {
1282                 free(new5ticket);
1283                 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1284                         "Error allocating cipher in krb5ticket.\n");
1285                 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1286                 return KRB5KRB_ERR_GENERIC;
1287                 }
1288         else
1289                 {
1290                 memcpy(new5ticket->enc_part.ciphertext.data,
1291                         asn1ticket->encdata->cipher->data,
1292                         asn1ticket->encdata->cipher->length);
1293                 }
1294
1295         *krb5ticket = new5ticket;
1296         return 0;
1297         }
1298
1299
1300 /*      Given krb5 service name in KSSL_CTX *kssl_ctx (typically "kssl"),
1301 **              and krb5 AP_REQ message & message length,
1302 **      Return Kerberos session key and client principle
1303 **              to SSL Server in KSSL_CTX *kssl_ctx.
1304 **
1305 **      19990702        VRS     Started.
1306 */
1307 krb5_error_code
1308 kssl_sget_tkt(  /* UPDATE */    KSSL_CTX                *kssl_ctx,
1309                 /* IN     */    krb5_data               *indata,
1310                 /* OUT    */    krb5_ticket_times       *ttimes,
1311                 /* OUT    */    KSSL_ERR                *kssl_err  )
1312         {
1313         krb5_error_code                 krb5rc = KRB5KRB_ERR_GENERIC;
1314         static krb5_context             krb5context = NULL;
1315         static krb5_auth_context        krb5auth_context = NULL;
1316         krb5_ticket                     *krb5ticket = NULL;
1317         KRB5_TKTBODY                    *asn1ticket = NULL;
1318         const unsigned char             *p;
1319         krb5_keytab                     krb5keytab = NULL;
1320         krb5_keytab_entry               kt_entry;
1321         krb5_principal                  krb5server;
1322         krb5_rcache                     rcache = NULL;
1323
1324         kssl_err_set(kssl_err, 0, "");
1325
1326         if (!kssl_ctx)
1327                 {
1328                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1329                         "No kssl_ctx defined.\n");
1330                 goto err;
1331                 }
1332
1333 #ifdef KSSL_DEBUG
1334         printf("in kssl_sget_tkt(%s)\n", kstring(kssl_ctx->service_name));
1335 #endif  /* KSSL_DEBUG */
1336
1337         if (!krb5context  &&  (krb5rc = krb5_init_context(&krb5context)))
1338                 {
1339                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1340                         "krb5_init_context() fails.\n");
1341                 goto err;
1342                 }
1343         if (krb5auth_context  &&
1344                 (krb5rc = krb5_auth_con_free(krb5context, krb5auth_context)))
1345                 {
1346                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1347                         "krb5_auth_con_free() fails.\n");
1348                 goto err;
1349                 }
1350         else  krb5auth_context = NULL;
1351         if (!krb5auth_context  &&
1352                 (krb5rc = krb5_auth_con_init(krb5context, &krb5auth_context)))
1353                 {
1354                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1355                         "krb5_auth_con_init() fails.\n");
1356                 goto err;
1357                 }
1358
1359
1360         if ((krb5rc = krb5_auth_con_getrcache(krb5context, krb5auth_context,
1361                 &rcache)))
1362                 {
1363                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1364                         "krb5_auth_con_getrcache() fails.\n");
1365                 goto err;
1366                 }
1367
1368         if ((krb5rc = krb5_sname_to_principal(krb5context, NULL,
1369                 (kssl_ctx->service_name)? kssl_ctx->service_name: KRB5SVC,
1370                 KRB5_NT_SRV_HST, &krb5server)) != 0)
1371                 {
1372                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1373                         "krb5_sname_to_principal() fails.\n");
1374                 goto err;
1375                 }
1376
1377         if (rcache == NULL)
1378                 {
1379                 if ((krb5rc = krb5_get_server_rcache(krb5context,
1380                         krb5_princ_component(krb5context, krb5server, 0),
1381                         &rcache)))
1382                         {
1383                         kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1384                                 "krb5_get_server_rcache() fails.\n");
1385                         goto err;
1386                         }
1387                 }
1388
1389         if ((krb5rc = krb5_auth_con_setrcache(krb5context, krb5auth_context, rcache)))
1390                 {
1391                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1392                         "krb5_auth_con_setrcache() fails.\n");
1393                 goto err;
1394                 }
1395
1396
1397         /*      kssl_ctx->keytab_file == NULL ==> use Kerberos default
1398         */
1399         if (kssl_ctx->keytab_file)
1400                 {
1401                 krb5rc = krb5_kt_resolve(krb5context, kssl_ctx->keytab_file,
1402                         &krb5keytab);
1403                 if (krb5rc)
1404                         {
1405                         kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1406                                 "krb5_kt_resolve() fails.\n");
1407                         goto err;
1408                         }
1409                 }
1410         else
1411                 {
1412                 krb5rc = krb5_kt_default(krb5context,&krb5keytab);
1413                 if (krb5rc)
1414                         {
1415                         kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
1416                                 "krb5_kt_default() fails.\n");
1417                         goto err;
1418                         }
1419                 }
1420
1421         /*      Actual Kerberos5 krb5_recvauth() has initial conversation here
1422         **      o       check KRB5_SENDAUTH_BADAUTHVERS
1423         **              unless KRB5_RECVAUTH_SKIP_VERSION
1424         **      o       check KRB5_SENDAUTH_BADAPPLVERS
1425         **      o       send "0" msg if all OK
1426         */
1427
1428         /*  20010411 was using AP_REQ instead of true KerberosWrapper
1429         **
1430         **  if ((krb5rc = krb5_rd_req(krb5context, &krb5auth_context,
1431         **                      &krb5in_data, krb5server, krb5keytab,
1432         **                      &ap_option, &krb5ticket)) != 0)  { Error }
1433         */
1434
1435         p = (unsigned char *)indata->data;
1436         if ((asn1ticket = (KRB5_TKTBODY *) d2i_KRB5_TICKET(NULL, &p,
1437                                                 (long) indata->length)) == NULL)
1438                 {
1439                 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1440                         "d2i_KRB5_TICKET() ASN.1 decode failure.\n");
1441                 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1442                 goto err;
1443                 }
1444
1445         /* Was:  krb5rc = krb5_decode_ticket(krb5in_data,&krb5ticket)) != 0) */
1446         if ((krb5rc = kssl_TKT2tkt(krb5context, asn1ticket, &krb5ticket,
1447                                         kssl_err)) != 0)
1448                 {
1449                 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1450                         "Error converting ASN.1 ticket to krb5_ticket.\n");
1451                 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1452                 goto err;
1453                 }
1454
1455         if (! krb5_principal_compare(krb5context, krb5server,
1456                                                   krb5ticket->server))  {
1457                 krb5rc = KRB5_PRINC_NOMATCH;
1458                 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1459                         "server principal != ticket principal\n");
1460                 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1461                 goto err;
1462                 }
1463         if ((krb5rc = krb5_kt_get_entry(krb5context, krb5keytab,
1464                         krb5ticket->server, krb5ticket->enc_part.kvno,
1465                         krb5ticket->enc_part.enctype, &kt_entry)) != 0)  {
1466                 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1467                         "krb5_kt_get_entry() fails with %x.\n", krb5rc);
1468                 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1469                 goto err;
1470                 }
1471         if ((krb5rc = krb5_decrypt_tkt_part(krb5context, &kt_entry.key,
1472                         krb5ticket)) != 0)  {
1473                 BIO_snprintf(kssl_err->text, KSSL_ERR_MAX,
1474                         "krb5_decrypt_tkt_part() failed.\n");
1475                 kssl_err->reason = SSL_R_KRB5_S_RD_REQ;
1476                 goto err;
1477                 }
1478         else  {
1479                 krb5_kt_free_entry(krb5context, &kt_entry);
1480 #ifdef KSSL_DEBUG
1481                 {
1482                 int i; krb5_address **paddr = krb5ticket->enc_part2->caddrs;
1483                 printf("Decrypted ticket fields:\n");
1484                 printf("\tflags: %X, transit-type: %X",
1485                         krb5ticket->enc_part2->flags,
1486                         krb5ticket->enc_part2->transited.tr_type);
1487                 print_krb5_data("\ttransit-data: ",
1488                         &(krb5ticket->enc_part2->transited.tr_contents));
1489                 printf("\tcaddrs: %p, authdata: %p\n",
1490                         krb5ticket->enc_part2->caddrs,
1491                         krb5ticket->enc_part2->authorization_data);
1492                 if (paddr)
1493                         {
1494                         printf("\tcaddrs:\n");
1495                         for (i=0; paddr[i] != NULL; i++)
1496                                 {
1497                                 krb5_data d;
1498                                 d.length=paddr[i]->length;
1499                                 d.data=paddr[i]->contents;
1500                                 print_krb5_data("\t\tIP: ", &d);
1501                                 }
1502                         }
1503                 printf("\tstart/auth/end times: %d / %d / %d\n",
1504                         krb5ticket->enc_part2->times.starttime,
1505                         krb5ticket->enc_part2->times.authtime,
1506                         krb5ticket->enc_part2->times.endtime);
1507                 }
1508 #endif  /* KSSL_DEBUG */
1509                 }
1510
1511         krb5rc = KRB5_NO_TKT_SUPPLIED;
1512         if (!krb5ticket  ||     !krb5ticket->enc_part2  ||
1513                 !krb5ticket->enc_part2->client  ||
1514                 !krb5ticket->enc_part2->client->data  ||
1515                 !krb5ticket->enc_part2->session)
1516                 {
1517                 kssl_err_set(kssl_err, SSL_R_KRB5_S_BAD_TICKET,
1518                         "bad ticket from krb5_rd_req.\n");
1519                 }
1520         else if (kssl_ctx_setprinc(kssl_ctx, KSSL_CLIENT,
1521                  &krb5ticket->enc_part2->client->realm,
1522                  krb5ticket->enc_part2->client->data,
1523                  krb5ticket->enc_part2->client->length))
1524                 {
1525                 kssl_err_set(kssl_err, SSL_R_KRB5_S_BAD_TICKET,
1526                         "kssl_ctx_setprinc() fails.\n");
1527                 }
1528         else if (kssl_ctx_setkey(kssl_ctx, krb5ticket->enc_part2->session))
1529                 {
1530                 kssl_err_set(kssl_err, SSL_R_KRB5_S_BAD_TICKET,
1531                         "kssl_ctx_setkey() fails.\n");
1532                 }
1533         else if (krb5ticket->enc_part2->flags & TKT_FLG_INVALID)
1534                 {
1535                 krb5rc = KRB5KRB_AP_ERR_TKT_INVALID;
1536                 kssl_err_set(kssl_err, SSL_R_KRB5_S_BAD_TICKET,
1537                         "invalid ticket from krb5_rd_req.\n");
1538                 }
1539         else    krb5rc = 0;
1540
1541         kssl_ctx->enctype       = krb5ticket->enc_part.enctype;
1542         ttimes->authtime        = krb5ticket->enc_part2->times.authtime;
1543         ttimes->starttime       = krb5ticket->enc_part2->times.starttime;
1544         ttimes->endtime         = krb5ticket->enc_part2->times.endtime;
1545         ttimes->renew_till      = krb5ticket->enc_part2->times.renew_till;
1546
1547  err:
1548 #ifdef KSSL_DEBUG
1549         kssl_ctx_show(kssl_ctx);
1550 #endif  /* KSSL_DEBUG */
1551
1552         if (asn1ticket)         KRB5_TICKET_free((KRB5_TICKET *) asn1ticket);
1553         if (krb5keytab)         krb5_kt_close(krb5context, krb5keytab);
1554         if (krb5ticket)         krb5_free_ticket(krb5context, krb5ticket);
1555         if (krb5server)         krb5_free_principal(krb5context, krb5server);
1556         return (krb5rc);
1557         }
1558
1559
1560 /*      Allocate & return a new kssl_ctx struct.
1561 */
1562 KSSL_CTX        *
1563 kssl_ctx_new(void)
1564         {
1565         return ((KSSL_CTX *) kssl_calloc(1, sizeof(KSSL_CTX)));
1566         }
1567
1568
1569 /*      Frees a kssl_ctx struct and any allocated memory it holds.
1570 **      Returns NULL.
1571 */
1572 KSSL_CTX        *
1573 kssl_ctx_free(KSSL_CTX *kssl_ctx)
1574         {
1575         if (kssl_ctx == NULL)  return kssl_ctx;
1576
1577         if (kssl_ctx->key)              OPENSSL_cleanse(kssl_ctx->key,
1578                                                               kssl_ctx->length);
1579         if (kssl_ctx->key)              kssl_free(kssl_ctx->key);
1580         if (kssl_ctx->client_princ)     kssl_free(kssl_ctx->client_princ);
1581         if (kssl_ctx->service_host)     kssl_free(kssl_ctx->service_host);
1582         if (kssl_ctx->service_name)     kssl_free(kssl_ctx->service_name);
1583         if (kssl_ctx->keytab_file)      kssl_free(kssl_ctx->keytab_file);
1584
1585         kssl_free(kssl_ctx);
1586         return (KSSL_CTX *) NULL;
1587         }
1588
1589
1590 /*      Given an array of (krb5_data *) entity (and optional realm),
1591 **      set the plain (char *) client_princ or service_host member
1592 **      of the kssl_ctx struct.
1593 */
1594 krb5_error_code
1595 kssl_ctx_setprinc(KSSL_CTX *kssl_ctx, int which,
1596         krb5_data *realm, krb5_data *entity, int nentities)
1597         {
1598         char    **princ;
1599         int     length;
1600         int i;
1601
1602         if (kssl_ctx == NULL  ||  entity == NULL)  return KSSL_CTX_ERR;
1603
1604         switch (which)
1605                 {
1606         case KSSL_CLIENT:       princ = &kssl_ctx->client_princ;        break;
1607         case KSSL_SERVER:       princ = &kssl_ctx->service_host;        break;
1608         default:                return KSSL_CTX_ERR;                    break;
1609                 }
1610         if (*princ)  kssl_free(*princ);
1611
1612         /* Add up all the entity->lengths */
1613         length = 0;
1614         for (i=0; i < nentities; i++)
1615                 {
1616                 length += entity[i].length;
1617                 }
1618         /* Add in space for the '/' character(s) (if any) */
1619         length += nentities-1;
1620         /* Space for the ('@'+realm+NULL | NULL) */
1621         length += ((realm)? realm->length + 2: 1);
1622
1623         if ((*princ = kssl_calloc(1, length)) == NULL)
1624                 return KSSL_CTX_ERR;
1625         else
1626                 {
1627                 for (i = 0; i < nentities; i++)
1628                         {
1629                         strncat(*princ, entity[i].data, entity[i].length);
1630                         if (i < nentities-1)
1631                                 {
1632                                 strcat (*princ, "/");
1633                                 }
1634                         }
1635                 if (realm)
1636                         {
1637                         strcat (*princ, "@");
1638                         (void) strncat(*princ, realm->data, realm->length);
1639                         }
1640                 }
1641
1642         return KSSL_CTX_OK;
1643         }
1644
1645
1646 /*      Set one of the plain (char *) string members of the kssl_ctx struct.
1647 **      Default values should be:
1648 **              which == KSSL_SERVICE   =>      "khost" (KRB5SVC)
1649 **              which == KSSL_KEYTAB    =>      "/etc/krb5.keytab" (KRB5KEYTAB)
1650 */
1651 krb5_error_code
1652 kssl_ctx_setstring(KSSL_CTX *kssl_ctx, int which, char *text)
1653         {
1654         char    **string;
1655
1656         if (!kssl_ctx)  return KSSL_CTX_ERR;
1657
1658         switch (which)
1659                 {
1660         case KSSL_SERVICE:      string = &kssl_ctx->service_name;       break;
1661         case KSSL_SERVER:       string = &kssl_ctx->service_host;       break;
1662         case KSSL_CLIENT:       string = &kssl_ctx->client_princ;       break;
1663         case KSSL_KEYTAB:       string = &kssl_ctx->keytab_file;        break;
1664         default:                return KSSL_CTX_ERR;                    break;
1665                 }
1666         if (*string)  kssl_free(*string);
1667
1668         if (!text)
1669                 {
1670                 *string = '\0';
1671                 return KSSL_CTX_OK;
1672                 }
1673
1674         if ((*string = kssl_calloc(1, strlen(text) + 1)) == NULL)
1675                 return KSSL_CTX_ERR;
1676         else
1677                 strcpy(*string, text);
1678
1679         return KSSL_CTX_OK;
1680         }
1681
1682
1683 /*      Copy the Kerberos session key from a (krb5_keyblock *) to a kssl_ctx
1684 **      struct.  Clear kssl_ctx->key if Kerberos session key is NULL.
1685 */
1686 krb5_error_code
1687 kssl_ctx_setkey(KSSL_CTX *kssl_ctx, krb5_keyblock *session)
1688         {
1689         int             length;
1690         krb5_enctype    enctype;
1691         krb5_octet FAR  *contents = NULL;
1692
1693         if (!kssl_ctx)  return KSSL_CTX_ERR;
1694
1695         if (kssl_ctx->key)
1696                 {
1697                 OPENSSL_cleanse(kssl_ctx->key, kssl_ctx->length);
1698                 kssl_free(kssl_ctx->key);
1699                 }
1700
1701         if (session)
1702                 {
1703
1704 #ifdef KRB5_HEIMDAL
1705                 length = session->keyvalue->length;
1706                 enctype = session->keytype;
1707                 contents = session->keyvalue->contents;
1708 #else
1709                 length = session->length;
1710                 enctype = session->enctype;
1711                 contents = session->contents;
1712 #endif
1713                 kssl_ctx->enctype = enctype;
1714                 kssl_ctx->length  = length;
1715                 }
1716         else
1717                 {
1718                 kssl_ctx->enctype = ENCTYPE_UNKNOWN;
1719                 kssl_ctx->length  = 0;
1720                 return KSSL_CTX_OK;
1721                 }
1722
1723         if ((kssl_ctx->key =
1724                 (krb5_octet FAR *) kssl_calloc(1, kssl_ctx->length)) == NULL)
1725                 {
1726                 kssl_ctx->length  = 0;
1727                 return KSSL_CTX_ERR;
1728                 }
1729         else
1730                 memcpy(kssl_ctx->key, contents, length);
1731
1732         return KSSL_CTX_OK;
1733         }
1734
1735
1736 /*      Display contents of kssl_ctx struct
1737 */
1738 void
1739 kssl_ctx_show(KSSL_CTX *kssl_ctx)
1740         {
1741         int     i;
1742
1743         printf("kssl_ctx: ");
1744         if (kssl_ctx == NULL)
1745                 {
1746                 printf("NULL\n");
1747                 return;
1748                 }
1749         else
1750                 printf("%p\n", (void *)kssl_ctx);
1751
1752         printf("\tservice:\t%s\n",
1753                 (kssl_ctx->service_name)? kssl_ctx->service_name: "NULL");
1754         printf("\tclient:\t%s\n",
1755                 (kssl_ctx->client_princ)? kssl_ctx->client_princ: "NULL");
1756         printf("\tserver:\t%s\n",
1757                 (kssl_ctx->service_host)? kssl_ctx->service_host: "NULL");
1758         printf("\tkeytab:\t%s\n",
1759                 (kssl_ctx->keytab_file)? kssl_ctx->keytab_file: "NULL");
1760         printf("\tkey [%d:%d]:\t",
1761                 kssl_ctx->enctype, kssl_ctx->length);
1762
1763         for (i=0; i < kssl_ctx->length  &&  kssl_ctx->key; i++)
1764                 {
1765                 printf("%02x", kssl_ctx->key[i]);
1766                 }
1767         printf("\n");
1768         return;
1769         }
1770
1771     int
1772     kssl_keytab_is_available(KSSL_CTX *kssl_ctx)
1773 {
1774     krb5_context                krb5context = NULL;
1775     krb5_keytab                 krb5keytab = NULL;
1776     krb5_keytab_entry           entry;
1777     krb5_principal              princ = NULL;
1778     krb5_error_code             krb5rc = KRB5KRB_ERR_GENERIC;
1779     int rc = 0;
1780
1781     if ((krb5rc = krb5_init_context(&krb5context)))
1782         return(0);
1783
1784     /*  kssl_ctx->keytab_file == NULL ==> use Kerberos default
1785     */
1786     if (kssl_ctx->keytab_file)
1787     {
1788         krb5rc = krb5_kt_resolve(krb5context, kssl_ctx->keytab_file,
1789                                   &krb5keytab);
1790         if (krb5rc)
1791             goto exit;
1792     }
1793     else
1794     {
1795         krb5rc = krb5_kt_default(krb5context,&krb5keytab);
1796         if (krb5rc)
1797             goto exit;
1798     }
1799
1800     /* the host key we are looking for */
1801     krb5rc = krb5_sname_to_principal(krb5context, NULL,
1802                                      kssl_ctx->service_name ? kssl_ctx->service_name: KRB5SVC,
1803                                      KRB5_NT_SRV_HST, &princ);
1804
1805     if (krb5rc)
1806         goto exit;
1807
1808     krb5rc = krb5_kt_get_entry(krb5context, krb5keytab,
1809                                 princ,
1810                                 0 /* IGNORE_VNO */,
1811                                 0 /* IGNORE_ENCTYPE */,
1812                                 &entry);
1813     if ( krb5rc == KRB5_KT_NOTFOUND ) {
1814         rc = 1;
1815         goto exit;
1816     } else if ( krb5rc )
1817         goto exit;
1818
1819     krb5_kt_free_entry(krb5context, &entry);
1820     rc = 1;
1821
1822   exit:
1823     if (krb5keytab)     krb5_kt_close(krb5context, krb5keytab);
1824     if (princ)          krb5_free_principal(krb5context, princ);
1825     if (krb5context)    krb5_free_context(krb5context);
1826     return(rc);
1827 }
1828
1829 int
1830 kssl_tgt_is_available(KSSL_CTX *kssl_ctx)
1831         {
1832         krb5_error_code         krb5rc = KRB5KRB_ERR_GENERIC;
1833         krb5_context            krb5context = NULL;
1834         krb5_ccache             krb5ccdef = NULL;
1835         krb5_creds              krb5creds, *krb5credsp = NULL;
1836         int                     rc = 0;
1837
1838         memset((char *)&krb5creds, 0, sizeof(krb5creds));
1839
1840         if (!kssl_ctx)
1841             return(0);
1842
1843         if (!kssl_ctx->service_host)
1844             return(0);
1845
1846         if ((krb5rc = krb5_init_context(&krb5context)) != 0)
1847             goto err;
1848
1849         if ((krb5rc = krb5_sname_to_principal(krb5context,
1850                                               kssl_ctx->service_host,
1851                                               (kssl_ctx->service_name)? kssl_ctx->service_name: KRB5SVC,
1852                                               KRB5_NT_SRV_HST, &krb5creds.server)) != 0)
1853             goto err;
1854
1855         if ((krb5rc = krb5_cc_default(krb5context, &krb5ccdef)) != 0)
1856             goto err;
1857
1858         if ((krb5rc = krb5_cc_get_principal(krb5context, krb5ccdef,
1859                                              &krb5creds.client)) != 0)
1860             goto err;
1861
1862         if ((krb5rc = krb5_get_credentials(krb5context, 0, krb5ccdef,
1863                                             &krb5creds, &krb5credsp)) != 0)
1864             goto err;
1865
1866         rc = 1;
1867
1868       err:
1869 #ifdef KSSL_DEBUG
1870         kssl_ctx_show(kssl_ctx);
1871 #endif  /* KSSL_DEBUG */
1872
1873         if (krb5creds.client)   krb5_free_principal(krb5context, krb5creds.client);
1874         if (krb5creds.server)   krb5_free_principal(krb5context, krb5creds.server);
1875         if (krb5context)        krb5_free_context(krb5context);
1876         return(rc);
1877         }
1878
1879 #if !defined(OPENSSL_SYS_WINDOWS) && !defined(OPENSSL_SYS_WIN32)
1880 void kssl_krb5_free_data_contents(krb5_context context, krb5_data *data)
1881         {
1882 #ifdef KRB5_HEIMDAL
1883         data->length = 0;
1884         if (data->data)
1885             free(data->data);
1886 #elif defined(KRB5_MIT_OLD11)
1887         if (data->data)  {
1888                 krb5_xfree(data->data);
1889                 data->data = 0;
1890                 }
1891 #else
1892         krb5_free_data_contents(NULL, data);
1893 #endif
1894         }
1895 #endif /* !OPENSSL_SYS_WINDOWS && !OPENSSL_SYS_WIN32 */
1896
1897
1898 /*  Given pointers to KerberosTime and struct tm structs, convert the
1899 **  KerberosTime string to struct tm.  Note that KerberosTime is a
1900 **  ASN1_GENERALIZEDTIME value, constrained to GMT with no fractional
1901 **  seconds as defined in RFC 1510.
1902 **  Return pointer to the (partially) filled in struct tm on success,
1903 **  return NULL on failure.
1904 */
1905 struct tm       *k_gmtime(ASN1_GENERALIZEDTIME *gtime, struct tm *k_tm)
1906         {
1907         char            c, *p;
1908
1909         if (!k_tm)  return NULL;
1910         if (gtime == NULL  ||  gtime->length < 14)  return NULL;
1911         if (gtime->data == NULL)  return NULL;
1912
1913         p = (char *)&gtime->data[14];
1914
1915         c = *p;  *p = '\0';  p -= 2;  k_tm->tm_sec  = atoi(p);      *(p+2) = c;
1916         c = *p;  *p = '\0';  p -= 2;  k_tm->tm_min  = atoi(p);      *(p+2) = c;
1917         c = *p;  *p = '\0';  p -= 2;  k_tm->tm_hour = atoi(p);      *(p+2) = c;
1918         c = *p;  *p = '\0';  p -= 2;  k_tm->tm_mday = atoi(p);      *(p+2) = c;
1919         c = *p;  *p = '\0';  p -= 2;  k_tm->tm_mon  = atoi(p)-1;    *(p+2) = c;
1920         c = *p;  *p = '\0';  p -= 4;  k_tm->tm_year = atoi(p)-1900; *(p+4) = c;
1921
1922         return k_tm;
1923         }
1924
1925
1926 /*  Helper function for kssl_validate_times().
1927 **  We need context->clockskew, but krb5_context is an opaque struct.
1928 **  So we try to sneek the clockskew out through the replay cache.
1929 **      If that fails just return a likely default (300 seconds).
1930 */
1931 krb5_deltat     get_rc_clockskew(krb5_context context)
1932         {
1933         krb5_rcache     rc;
1934         krb5_deltat     clockskew;
1935
1936         if (krb5_rc_default(context, &rc))  return KSSL_CLOCKSKEW;
1937         if (krb5_rc_initialize(context, rc, 0))  return KSSL_CLOCKSKEW;
1938         if (krb5_rc_get_lifespan(context, rc, &clockskew))  {
1939                 clockskew = KSSL_CLOCKSKEW;
1940                 }
1941         (void) krb5_rc_destroy(context, rc);
1942         return clockskew;
1943         }
1944
1945
1946 /*  kssl_validate_times() combines (and more importantly exposes)
1947 **  the MIT KRB5 internal function krb5_validate_times() and the
1948 **  in_clock_skew() macro.  The authenticator client time is checked
1949 **  to be within clockskew secs of the current time and the current
1950 **  time is checked to be within the ticket start and expire times.
1951 **  Either check may be omitted by supplying a NULL value.
1952 **  Returns 0 for valid times, SSL_R_KRB5* error codes otherwise.
1953 **  See Also: (Kerberos source)/krb5/lib/krb5/krb/valid_times.c
1954 **  20010420 VRS
1955 */
1956 krb5_error_code  kssl_validate_times(   krb5_timestamp atime,
1957                                         krb5_ticket_times *ttimes)
1958         {
1959         krb5_deltat     skew;
1960         krb5_timestamp  start, now;
1961         krb5_error_code rc;
1962         krb5_context    context;
1963
1964         if ((rc = krb5_init_context(&context)))  return SSL_R_KRB5_S_BAD_TICKET;
1965         skew = get_rc_clockskew(context);
1966         if ((rc = krb5_timeofday(context,&now))) return SSL_R_KRB5_S_BAD_TICKET;
1967         krb5_free_context(context);
1968
1969         if (atime  &&  labs(atime - now) >= skew)  return SSL_R_KRB5_S_TKT_SKEW;
1970
1971         if (! ttimes)  return 0;
1972
1973         start = (ttimes->starttime != 0)? ttimes->starttime: ttimes->authtime;
1974         if (start - now > skew)  return SSL_R_KRB5_S_TKT_NYV;
1975         if ((now - ttimes->endtime) > skew)  return SSL_R_KRB5_S_TKT_EXPIRED;
1976
1977 #ifdef KSSL_DEBUG
1978         printf("kssl_validate_times: %d |<-  | %d - %d | < %d  ->| %d\n",
1979                 start, atime, now, skew, ttimes->endtime);
1980 #endif  /* KSSL_DEBUG */
1981
1982         return 0;
1983         }
1984
1985
1986 /*  Decode and decrypt given DER-encoded authenticator, then pass
1987 **  authenticator ctime back in *atimep (or 0 if time unavailable).
1988 **  Returns krb5_error_code and kssl_err on error.  A NULL
1989 **  authenticator (authentp->length == 0) is not considered an error.
1990 **  Note that kssl_check_authent() makes use of the KRB5 session key;
1991 **  you must call kssl_sget_tkt() to get the key before calling this routine.
1992 */
1993 krb5_error_code  kssl_check_authent(
1994                         /* IN     */    KSSL_CTX        *kssl_ctx,
1995                         /* IN     */    krb5_data       *authentp,
1996                         /* OUT    */    krb5_timestamp  *atimep,
1997                         /* OUT    */    KSSL_ERR        *kssl_err  )
1998         {
1999         krb5_error_code         krb5rc = 0;
2000         KRB5_ENCDATA            *dec_authent = NULL;
2001         KRB5_AUTHENTBODY        *auth = NULL;
2002         krb5_enctype            enctype;
2003         EVP_CIPHER_CTX          ciph_ctx;
2004         const EVP_CIPHER        *enc = NULL;
2005         unsigned char           iv[EVP_MAX_IV_LENGTH];
2006         const unsigned char     *p;
2007         unsigned char           *unenc_authent;
2008         int                     outl, unencbufsize;
2009         struct tm               tm_time, *tm_l, *tm_g;
2010         time_t                  now, tl, tg, tr, tz_offset;
2011
2012         EVP_CIPHER_CTX_init(&ciph_ctx);
2013         *atimep = 0;
2014         kssl_err_set(kssl_err, 0, "");
2015
2016 #ifndef KRB5CHECKAUTH
2017         authentp = NULL;
2018 #else
2019 #if     KRB5CHECKAUTH == 0
2020         authentp = NULL;
2021 #endif
2022 #endif  /* KRB5CHECKAUTH */
2023
2024         if (authentp == NULL  ||  authentp->length == 0)  return 0;
2025
2026 #ifdef KSSL_DEBUG
2027         {
2028         unsigned int ui;
2029         printf("kssl_check_authent: authenticator[%d]:\n",authentp->length);
2030         p = authentp->data;
2031         for (ui=0; ui < authentp->length; ui++)  printf("%02x ",p[ui]);
2032         printf("\n");
2033         }
2034 #endif  /* KSSL_DEBUG */
2035
2036         unencbufsize = 2 * authentp->length;
2037         if ((unenc_authent = calloc(1, unencbufsize)) == NULL)
2038                 {
2039                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
2040                         "Unable to allocate authenticator buffer.\n");
2041                 krb5rc = KRB5KRB_ERR_GENERIC;
2042                 goto err;
2043                 }
2044
2045         p = (unsigned char *)authentp->data;
2046         if ((dec_authent = d2i_KRB5_ENCDATA(NULL, &p,
2047                                         (long) authentp->length)) == NULL)
2048                 {
2049                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
2050                         "Error decoding authenticator.\n");
2051                 krb5rc = KRB5KRB_AP_ERR_BAD_INTEGRITY;
2052                 goto err;
2053                 }
2054
2055         enctype = dec_authent->etype->data[0];  /* should = kssl_ctx->enctype */
2056 #if !defined(KRB5_MIT_OLD11)
2057             switch ( enctype ) {
2058             case ENCTYPE_DES3_CBC_SHA1:         /*    EVP_des_ede3_cbc();  */
2059             case ENCTYPE_DES3_CBC_SHA:
2060             case ENCTYPE_DES3_CBC_RAW:
2061                 krb5rc = 0;                     /* Skip, can't handle derived keys */
2062                 goto err;
2063             }
2064 #endif
2065         enc = kssl_map_enc(enctype);
2066         memset(iv, 0, sizeof iv);       /* per RFC 1510 */
2067
2068         if (enc == NULL)
2069                 {
2070                 /*  Disable kssl_check_authent for ENCTYPE_DES3_CBC_SHA1.
2071                 **  This enctype indicates the authenticator was encrypted
2072                 **  using key-usage derived keys which openssl cannot decrypt.
2073                 */
2074                 goto err;
2075                 }
2076
2077         if (!EVP_CipherInit(&ciph_ctx,enc,kssl_ctx->key,iv,0))
2078                 {
2079                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
2080                         "EVP_CipherInit error decrypting authenticator.\n");
2081                 krb5rc = KRB5KRB_AP_ERR_BAD_INTEGRITY;
2082                 goto err;
2083                 }
2084         outl = dec_authent->cipher->length;
2085         if (!EVP_Cipher(&ciph_ctx,unenc_authent,dec_authent->cipher->data,outl))
2086                 {
2087                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
2088                         "EVP_Cipher error decrypting authenticator.\n");
2089                 krb5rc = KRB5KRB_AP_ERR_BAD_INTEGRITY;
2090                 goto err;
2091                 }
2092         EVP_CIPHER_CTX_cleanup(&ciph_ctx);
2093
2094 #ifdef KSSL_DEBUG
2095         printf("kssl_check_authent: decrypted authenticator[%d] =\n", outl);
2096         for (padl=0; padl < outl; padl++) printf("%02x ",unenc_authent[padl]);
2097         printf("\n");
2098 #endif  /* KSSL_DEBUG */
2099
2100         if ((p = kssl_skip_confound(enctype, unenc_authent)) == NULL)
2101                 {
2102                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
2103                         "confounded by authenticator.\n");
2104                 krb5rc = KRB5KRB_AP_ERR_BAD_INTEGRITY;
2105                 goto err;
2106                 }
2107         outl -= p - unenc_authent;
2108
2109         if ((auth = (KRB5_AUTHENTBODY *) d2i_KRB5_AUTHENT(NULL, &p,
2110                                                           (long) outl))==NULL)
2111                 {
2112                 kssl_err_set(kssl_err, SSL_R_KRB5_S_INIT,
2113                         "Error decoding authenticator body.\n");
2114                 krb5rc = KRB5KRB_AP_ERR_BAD_INTEGRITY;
2115                 goto err;
2116                 }
2117
2118         memset(&tm_time,0,sizeof(struct tm));
2119         if (k_gmtime(auth->ctime, &tm_time)  &&
2120                 ((tr = mktime(&tm_time)) != (time_t)(-1)))
2121                 {
2122                 now  = time(&now);
2123                 tm_l = localtime(&now);         tl = mktime(tm_l);
2124                 tm_g = gmtime(&now);            tg = mktime(tm_g);
2125                 tz_offset = tg - tl;
2126
2127                 *atimep = tr - tz_offset;
2128                 }
2129
2130 #ifdef KSSL_DEBUG
2131         printf("kssl_check_authent: returns %d for client time ", *atimep);
2132         if (auth && auth->ctime && auth->ctime->length && auth->ctime->data)
2133                 printf("%.*s\n", auth->ctime->length, auth->ctime->data);
2134         else    printf("NULL\n");
2135 #endif  /* KSSL_DEBUG */
2136
2137  err:
2138         if (auth)               KRB5_AUTHENT_free((KRB5_AUTHENT *) auth);
2139         if (dec_authent)        KRB5_ENCDATA_free(dec_authent);
2140         if (unenc_authent)      free(unenc_authent);
2141         EVP_CIPHER_CTX_cleanup(&ciph_ctx);
2142         return krb5rc;
2143         }
2144
2145
2146 /*  Replaces krb5_build_principal_ext(), with varargs length == 2 (svc, host),
2147 **  because I dont't know how to stub varargs.
2148 **  Returns krb5_error_code == ENOMEM on alloc error, otherwise
2149 **  passes back newly constructed principal, which should be freed by caller.
2150 */
2151 krb5_error_code  kssl_build_principal_2(
2152                         /* UPDATE */    krb5_context    context,
2153                         /* OUT    */    krb5_principal  *princ,
2154                         /* IN     */    int rlen,  const char *realm,
2155                         /* IN     */    int slen,  const char *svc,
2156                         /* IN     */    int hlen,  const char *host)
2157         {
2158         krb5_data               *p_data = NULL;
2159         krb5_principal          new_p = NULL;
2160         char                    *new_r = NULL;
2161
2162         if ((p_data = (krb5_data *) calloc(2, sizeof(krb5_data))) == NULL  ||
2163             (new_p = (krb5_principal) calloc(1, sizeof(krb5_principal_data)))
2164                         == NULL)  goto err;
2165         new_p->length = 2;
2166         new_p->data = p_data;
2167
2168         if ((new_r = calloc(1, rlen + 1)) == NULL)  goto err;
2169         memcpy(new_r, realm, rlen);
2170         krb5_princ_set_realm_length(context, new_p, rlen);
2171         krb5_princ_set_realm_data(context, new_p, new_r);
2172
2173         if ((new_p->data[0].data = calloc(1, slen + 1)) == NULL)  goto err;
2174         memcpy(new_p->data[0].data, svc, slen);
2175         new_p->data[0].length = slen;
2176
2177         if ((new_p->data[1].data = calloc(1, hlen + 1)) == NULL)  goto err;
2178         memcpy(new_p->data[1].data, host, hlen);
2179         new_p->data[1].length = hlen;
2180
2181         krb5_princ_type(context, new_p) = KRB5_NT_UNKNOWN;
2182         *princ = new_p;
2183         return 0;
2184
2185  err:
2186         if (new_p  &&  new_p[0].data)   free(new_p[0].data);
2187         if (new_p  &&  new_p[1].data)   free(new_p[1].data);
2188         if (new_p)      free(new_p);
2189         if (new_r)      free(new_r);
2190         return ENOMEM;
2191         }
2192
2193
2194 #else /* !OPENSSL_NO_KRB5 */
2195
2196 #if defined(PEDANTIC) || defined(OPENSSL_SYS_VMS)
2197 static void *dummy=&dummy;
2198 #endif
2199
2200 #endif  /* !OPENSSL_NO_KRB5     */
2201