ssh-gss.h

   1 /* $OpenBSD: ssh-gss.h,v 1.7 2006/08/03 03:34:42 deraadt 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 #ifdef HAVE_GSSAPI_H
  32 #include <gssapi.h>
  33 #elif defined(HAVE_GSSAPI_GSSAPI_H)
  34 #include <gssapi/gssapi.h>
  35 #endif
  36
  37 #ifdef KRB5
  38 # ifndef HEIMDAL
  39 #  ifdef HAVE_GSSAPI_GENERIC_H
  40 #   include <gssapi_generic.h>
  41 #  elif defined(HAVE_GSSAPI_GSSAPI_GENERIC_H)
  42 #   include <gssapi/gssapi_generic.h>
  43 #  endif
  44
  45 /* MIT Kerberos doesn't seem to define GSS_NT_HOSTBASED_SERVICE */
  46
  47 #ifndef GSS_C_NT_HOSTBASED_SERVICE
  48 #define GSS_C_NT_HOSTBASED_SERVICE gss_nt_service_name
  49 #endif /* GSS_C_NT_... */
  50 #endif /* !HEIMDAL */
  51 #endif /* KRB5 */
  52
  53 /* draft-ietf-secsh-gsskeyex-06 */
  54 #define SSH2_MSG_USERAUTH_GSSAPI_RESPONSE               60
  55 #define SSH2_MSG_USERAUTH_GSSAPI_TOKEN                  61
  56 #define SSH2_MSG_USERAUTH_GSSAPI_EXCHANGE_COMPLETE      63
  57 #define SSH2_MSG_USERAUTH_GSSAPI_ERROR                  64
  58 #define SSH2_MSG_USERAUTH_GSSAPI_ERRTOK                 65
  59 #define SSH2_MSG_USERAUTH_GSSAPI_MIC                    66
  60
  61 #define SSH_GSS_OIDTYPE 0x06
  62
  63 typedef struct {
  64         char *filename;
  65         char *envvar;
  66         char *envval;
  67         void *data;
  68 } ssh_gssapi_ccache;
  69
  70 typedef struct {
  71         gss_buffer_desc displayname;
  72         gss_buffer_desc exportedname;
  73         gss_cred_id_t creds;
  74         struct ssh_gssapi_mech_struct *mech;
  75         ssh_gssapi_ccache store;
  76 } ssh_gssapi_client;
  77
  78 typedef struct ssh_gssapi_mech_struct {
  79         char *enc_name;
  80         char *name;
  81         gss_OID_desc oid;
  82         int (*dochild) (ssh_gssapi_client *);
  83         int (*userok) (ssh_gssapi_client *, char *);
  84         int (*localname) (ssh_gssapi_client *, char **);
  85         void (*storecreds) (ssh_gssapi_client *);
  86 } ssh_gssapi_mech;
  87
  88 typedef struct {
  89         OM_uint32       major; /* both */
  90         OM_uint32       minor; /* both */
  91         gss_ctx_id_t    context; /* both */
  92         gss_name_t      name; /* both */
  93         gss_OID         oid; /* client */
  94         gss_cred_id_t   creds; /* server */
  95         gss_name_t      client; /* server */
  96         gss_cred_id_t   client_creds; /* server */
  97 } Gssctxt;
  98
  99 extern ssh_gssapi_mech *supported_mechs[];
 100
 101 int  ssh_gssapi_check_oid(Gssctxt *, void *, size_t);
 102 void ssh_gssapi_set_oid_data(Gssctxt *, void *, size_t);
 103 void ssh_gssapi_set_oid(Gssctxt *, gss_OID);
 104 void ssh_gssapi_supported_oids(gss_OID_set *);
 105 ssh_gssapi_mech *ssh_gssapi_get_ctype(Gssctxt *);
 106
 107 OM_uint32 ssh_gssapi_import_name(Gssctxt *, const char *);
 108 OM_uint32 ssh_gssapi_acquire_cred(Gssctxt *);
 109 OM_uint32 ssh_gssapi_init_ctx(Gssctxt *, int,
 110     gss_buffer_desc *, gss_buffer_desc *, OM_uint32 *);
 111 OM_uint32 ssh_gssapi_accept_ctx(Gssctxt *,
 112     gss_buffer_desc *, gss_buffer_desc *, OM_uint32 *);
 113 OM_uint32 ssh_gssapi_getclient(Gssctxt *, ssh_gssapi_client *);
 114 void ssh_gssapi_error(Gssctxt *);
 115 char *ssh_gssapi_last_error(Gssctxt *, OM_uint32 *, OM_uint32 *);
 116 void ssh_gssapi_build_ctx(Gssctxt **);
 117 void ssh_gssapi_delete_ctx(Gssctxt **);
 118 OM_uint32 ssh_gssapi_sign(Gssctxt *, gss_buffer_t, gss_buffer_t);
 119 OM_uint32 ssh_gssapi_server_ctx(Gssctxt **, gss_OID);
 120 void ssh_gssapi_buildmic(Buffer *, const char *, const char *, const char *);
 121
 122 /* In the server */
 123 int ssh_gssapi_userok(char *name);
 124 OM_uint32 ssh_gssapi_checkmic(Gssctxt *, gss_buffer_t, gss_buffer_t);
 125 void ssh_gssapi_do_child(char ***, u_int *);
 126 void ssh_gssapi_cleanup_creds(void);
 127 void ssh_gssapi_storecreds(void);
 128
 129 #endif /* GSSAPI */
 130
 131 #endif /* _SSH_GSS_H */