ssl/kssl.h

   1 /* ssl/kssl.h -*- mode: C; c-file-style: "eay" -*- */
   2 /* Written by Vern Staats <staatsvr@asc.hpc.mil> for the OpenSSL project 2000.
   3  * project 2000.
   4  */
   5 /* ====================================================================
   6  * Copyright (c) 2000 The OpenSSL Project.  All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in
  17  *    the documentation and/or other materials provided with the
  18  *    distribution.
  19  *
  20  * 3. All advertising materials mentioning features or use of this
  21  *    software must display the following acknowledgment:
  22  *    "This product includes software developed by the OpenSSL Project
  23  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  24  *
  25  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  26  *    endorse or promote products derived from this software without
  27  *    prior written permission. For written permission, please contact
  28  *    licensing@OpenSSL.org.
  29  *
  30  * 5. Products derived from this software may not be called "OpenSSL"
  31  *    nor may "OpenSSL" appear in their names without prior written
  32  *    permission of the OpenSSL Project.
  33  *
  34  * 6. Redistributions of any form whatsoever must retain the following
  35  *    acknowledgment:
  36  *    "This product includes software developed by the OpenSSL Project
  37  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  38  *
  39  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  40  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  41  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  42  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  43  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  44  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  45  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  46  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  48  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  49  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  50  * OF THE POSSIBILITY OF SUCH DAMAGE.
  51  * ====================================================================
  52  *
  53  * This product includes cryptographic software written by Eric Young
  54  * (eay@cryptsoft.com).  This product includes software written by Tim
  55  * Hudson (tjh@cryptsoft.com).
  56  *
  57  */
  58
  59 /*
  60 **      19990701        VRS     Started.
  61 */
  62
  63 #ifndef KSSL_H
  64 #define KSSL_H
  65
  66 #include <openssl/opensslconf.h>
  67
  68 #ifndef OPENSSL_NO_KRB5
  69
  70 #include <stdio.h>
  71 #include <ctype.h>
  72 #include <krb5.h>
  73
  74 #ifdef  __cplusplus
  75 extern "C" {
  76 #endif
  77
  78 /*
  79  *      Depending on which KRB5 implementation used, some types from
  80  *      the other may be missing.  Resolve that here and now
  81  */
  82 #ifdef KRB5_HEIMDAL
  83 typedef unsigned char krb5_octet;
  84 #define FAR
  85 #else
  86
  87 #ifndef FAR
  88 #define FAR
  89 #endif
  90
  91 #endif
  92
  93 /*-
  94  *      Uncomment this to debug kssl problems or
  95  *      to trace usage of the Kerberos session key
  96  *
  97  *      #define         KSSL_DEBUG
  98  */
  99
 100 #ifndef KRB5SVC
 101 #define KRB5SVC "host"
 102 #endif
 103
 104 #ifndef KRB5KEYTAB
 105 #define KRB5KEYTAB      "/etc/krb5.keytab"
 106 #endif
 107
 108 #ifndef KRB5SENDAUTH
 109 #define KRB5SENDAUTH    1
 110 #endif
 111
 112 #ifndef KRB5CHECKAUTH
 113 #define KRB5CHECKAUTH   1
 114 #endif
 115
 116 #ifndef KSSL_CLOCKSKEW
 117 #define KSSL_CLOCKSKEW  300;
 118 #endif
 119
 120 #define KSSL_ERR_MAX    255
 121 typedef struct kssl_err_st  {
 122         int  reason;
 123         char text[KSSL_ERR_MAX+1];
 124         } KSSL_ERR;
 125
 126
 127 /*-     Context for passing
 128  *              (1) Kerberos session key to SSL, and
 129  *              (2)     Config data between application and SSL lib
 130  */
 131 typedef struct kssl_ctx_st
 132         {
 133                                 /*      used by:    disposition:            */
 134         char *service_name;     /*      C,S         default ok (kssl)       */
 135         char *service_host;     /*      C           input, REQUIRED         */
 136         char *client_princ;     /*      S           output from krb5 ticket */
 137         char *keytab_file;      /*      S           NULL (/etc/krb5.keytab) */
 138         char *cred_cache;       /*      C           NULL (default)          */
 139         krb5_enctype enctype;
 140         int length;
 141         krb5_octet FAR *key;
 142         } KSSL_CTX;
 143
 144 #define KSSL_CLIENT     1
 145 #define KSSL_SERVER     2
 146 #define KSSL_SERVICE    3
 147 #define KSSL_KEYTAB     4
 148
 149 #define KSSL_CTX_OK     0
 150 #define KSSL_CTX_ERR    1
 151 #define KSSL_NOMEM      2
 152
 153 /* Public (for use by applications that use OpenSSL with Kerberos 5 support */
 154 krb5_error_code kssl_ctx_setstring(KSSL_CTX *kssl_ctx, int which, char *text);
 155 KSSL_CTX *kssl_ctx_new(void);
 156 KSSL_CTX *kssl_ctx_free(KSSL_CTX *kssl_ctx);
 157 void kssl_ctx_show(KSSL_CTX *kssl_ctx);
 158 krb5_error_code kssl_ctx_setprinc(KSSL_CTX *kssl_ctx, int which,
 159         krb5_data *realm, krb5_data *entity, int nentities);
 160 krb5_error_code kssl_cget_tkt(KSSL_CTX *kssl_ctx,  krb5_data **enc_tktp,
 161         krb5_data *authenp, KSSL_ERR *kssl_err);
 162 krb5_error_code kssl_sget_tkt(KSSL_CTX *kssl_ctx,  krb5_data *indata,
 163         krb5_ticket_times *ttimes, KSSL_ERR *kssl_err);
 164 krb5_error_code kssl_ctx_setkey(KSSL_CTX *kssl_ctx, krb5_keyblock *session);
 165 void    kssl_err_set(KSSL_ERR *kssl_err, int reason, char *text);
 166 void kssl_krb5_free_data_contents(krb5_context context, krb5_data *data);
 167 krb5_error_code  kssl_build_principal_2(krb5_context context,
 168                         krb5_principal *princ, int rlen, const char *realm,
 169                         int slen, const char *svc, int hlen, const char *host);
 170 krb5_error_code  kssl_validate_times(krb5_timestamp atime,
 171                                         krb5_ticket_times *ttimes);
 172 krb5_error_code  kssl_check_authent(KSSL_CTX *kssl_ctx, krb5_data *authentp,
 173                                     krb5_timestamp *atimep, KSSL_ERR *kssl_err);
 174 unsigned char   *kssl_skip_confound(krb5_enctype enctype, unsigned char *authn);
 175
 176 #ifdef  __cplusplus
 177 }
 178 #endif
 179 #endif  /* OPENSSL_NO_KRB5      */
 180 #endif  /* KSSL_H       */