ssh-gss.h

   1 /* $OpenBSD: ssh-gss.h,v 1.6 2006/03/25 22:22:43 djm Exp $ */
   2 /*
   3  * Copyright (c) 2001-2003 Simon Wilkinson. All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR `AS IS'' AND ANY EXPRESS OR
  15  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  16  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  17  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  18  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  19  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  20  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  21  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  23  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26 #ifndef _SSH_GSS_H
  27 #define _SSH_GSS_H
  28
  29 #ifdef GSSAPI
  30
  31 #include "buffer.h"
  32
  33 #ifdef HAVE_GSSAPI_H
  34 #include <gssapi.h>
  35 #elif defined(HAVE_GSSAPI_GSSAPI_H)
  36 #include <gssapi/gssapi.h>
  37 #endif
  38
  39 #ifdef KRB5
  40 # ifndef HEIMDAL
  41 #  ifdef HAVE_GSSAPI_GENERIC_H
  42 #   include <gssapi_generic.h>
  43 #  elif defined(HAVE_GSSAPI_GSSAPI_GENERIC_H)
  44 #   include <gssapi/gssapi_generic.h>
  45 #  endif
  46
  47 /* MIT Kerberos doesn't seem to define GSS_NT_HOSTBASED_SERVICE */
  48
  49 #ifndef GSS_C_NT_HOSTBASED_SERVICE
  50 #define GSS_C_NT_HOSTBASED_SERVICE gss_nt_service_name
  51 #endif /* GSS_C_NT_... */
  52 #endif /* !HEIMDAL */
  53 #endif /* KRB5 */
  54
  55 /* draft-ietf-secsh-gsskeyex-06 */
  56 #define SSH2_MSG_USERAUTH_GSSAPI_RESPONSE               60
  57 #define SSH2_MSG_USERAUTH_GSSAPI_TOKEN                  61
  58 #define SSH2_MSG_USERAUTH_GSSAPI_EXCHANGE_COMPLETE      63
  59 #define SSH2_MSG_USERAUTH_GSSAPI_ERROR                  64
  60 #define SSH2_MSG_USERAUTH_GSSAPI_ERRTOK                 65
  61 #define SSH2_MSG_USERAUTH_GSSAPI_MIC                    66
  62
  63 #define SSH_GSS_OIDTYPE 0x06
  64
  65 typedef struct {
  66         char *filename;
  67         char *envvar;
  68         char *envval;
  69         void *data;
  70 } ssh_gssapi_ccache;
  71
  72 typedef struct {
  73         gss_buffer_desc displayname;
  74         gss_buffer_desc exportedname;
  75         gss_cred_id_t creds;
  76         struct ssh_gssapi_mech_struct *mech;
  77         ssh_gssapi_ccache store;
  78 } ssh_gssapi_client;
  79
  80 typedef struct ssh_gssapi_mech_struct {
  81         char *enc_name;
  82         char *name;
  83         gss_OID_desc oid;
  84         int (*dochild) (ssh_gssapi_client *);
  85         int (*userok) (ssh_gssapi_client *, char *);
  86         int (*localname) (ssh_gssapi_client *, char **);
  87         void (*storecreds) (ssh_gssapi_client *);
  88 } ssh_gssapi_mech;
  89
  90 typedef struct {
  91         OM_uint32       major; /* both */
  92         OM_uint32       minor; /* both */
  93         gss_ctx_id_t    context; /* both */
  94         gss_name_t      name; /* both */
  95         gss_OID         oid; /* client */
  96         gss_cred_id_t   creds; /* server */
  97         gss_name_t      client; /* server */
  98         gss_cred_id_t   client_creds; /* server */
  99 } Gssctxt;
 100
 101 extern ssh_gssapi_mech *supported_mechs[];
 102
 103 int  ssh_gssapi_check_oid(Gssctxt *, void *, size_t);
 104 void ssh_gssapi_set_oid_data(Gssctxt *, void *, size_t);
 105 void ssh_gssapi_set_oid(Gssctxt *, gss_OID);
 106 void ssh_gssapi_supported_oids(gss_OID_set *);
 107 ssh_gssapi_mech *ssh_gssapi_get_ctype(Gssctxt *);
 108
 109 OM_uint32 ssh_gssapi_import_name(Gssctxt *, const char *);
 110 OM_uint32 ssh_gssapi_acquire_cred(Gssctxt *);
 111 OM_uint32 ssh_gssapi_init_ctx(Gssctxt *, int,
 112     gss_buffer_desc *, gss_buffer_desc *, OM_uint32 *);
 113 OM_uint32 ssh_gssapi_accept_ctx(Gssctxt *,
 114     gss_buffer_desc *, gss_buffer_desc *, OM_uint32 *);
 115 OM_uint32 ssh_gssapi_getclient(Gssctxt *, ssh_gssapi_client *);
 116 void ssh_gssapi_error(Gssctxt *);
 117 char *ssh_gssapi_last_error(Gssctxt *, OM_uint32 *, OM_uint32 *);
 118 void ssh_gssapi_build_ctx(Gssctxt **);
 119 void ssh_gssapi_delete_ctx(Gssctxt **);
 120 OM_uint32 ssh_gssapi_sign(Gssctxt *, gss_buffer_t, gss_buffer_t);
 121 OM_uint32 ssh_gssapi_server_ctx(Gssctxt **, gss_OID);
 122 void ssh_gssapi_buildmic(Buffer *, const char *, const char *, const char *);
 123
 124 /* In the server */
 125 int ssh_gssapi_userok(char *name);
 126 OM_uint32 ssh_gssapi_checkmic(Gssctxt *, gss_buffer_t, gss_buffer_t);
 127 void ssh_gssapi_do_child(char ***, u_int *);
 128 void ssh_gssapi_cleanup_creds(void);
 129 void ssh_gssapi_storecreds(void);
 130
 131 #endif /* GSSAPI */
 132
 133 #endif /* _SSH_GSS_H */