text: /* $OpenBSD: ssh-gss.h,v 1.10 2007/06/12 08:20:00 djm Exp $ */
  /*
   * Copyright (c) 2001-2009 Simon Wilkinson. All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   *
   * THIS SOFTWARE IS PROVIDED BY THE AUTHOR `AS IS'' AND ANY EXPRESS OR
   * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  #ifndef _SSH_GSS_H
  #define _SSH_GSS_H
  
  #ifdef GSSAPI
  
  /* Need this include to fix GSI AIX 64-bit builds. */
  #include <unistd.h>
  
  #ifdef GSI
  
  #ifdef iovec
  #define gsi_save_iovec iovec
  #undef iovec
  #endif
  #endif
  
  #define iovec gsi_iovec
  
  #ifdef HAVE_GSSAPI_H
  #include <gssapi.h>
  #elif defined(HAVE_GSSAPI_GSSAPI_H)
  #include <gssapi/gssapi.h>
  #endif
  
  #undef iovec
  
  #ifdef gsi_save_iovec
  #define iovec gsi_save_iovec
  #endif
  
  #ifndef MECHGLUE
  #ifdef KRB5
  # ifndef HEIMDAL
  #  ifdef HAVE_GSSAPI_GENERIC_H
  #   include <gssapi_generic.h>
  #  elif defined(HAVE_GSSAPI_GSSAPI_GENERIC_H)
  #   include <gssapi/gssapi_generic.h>
  #  endif
  
  /* Old MIT Kerberos doesn't seem to define GSS_NT_HOSTBASED_SERVICE */
  
  #  if !HAVE_DECL_GSS_C_NT_HOSTBASED_SERVICE
  #   define GSS_C_NT_HOSTBASED_SERVICE gss_nt_service_name
  #  endif /* !HAVE_DECL_GSS_C_NT_... */
  
  # endif /* !HEIMDAL */
  #endif /* KRB5 */
  #endif /* !MECHGLUE */
  
  /* draft-ietf-secsh-gsskeyex-06 */
  #define SSH2_MSG_USERAUTH_GSSAPI_RESPONSE		60
  #define SSH2_MSG_USERAUTH_GSSAPI_TOKEN			61
  #define SSH2_MSG_USERAUTH_GSSAPI_EXCHANGE_COMPLETE	63
  #define SSH2_MSG_USERAUTH_GSSAPI_ERROR			64
  #define SSH2_MSG_USERAUTH_GSSAPI_ERRTOK			65
  #define SSH2_MSG_USERAUTH_GSSAPI_MIC			66
  
  #define SSH_GSS_OIDTYPE 0x06
  
  #define SSH2_MSG_KEXGSS_INIT                            30
  #define SSH2_MSG_KEXGSS_CONTINUE                        31
  #define SSH2_MSG_KEXGSS_COMPLETE                        32
  #define SSH2_MSG_KEXGSS_HOSTKEY                         33
  #define SSH2_MSG_KEXGSS_ERROR                           34
  #define SSH2_MSG_KEXGSS_GROUPREQ			40
  #define SSH2_MSG_KEXGSS_GROUP				41
  #define KEX_GSS_GRP1_SHA1_ID				"gss-group1-sha1-"
  #define KEX_GSS_GRP14_SHA1_ID				"gss-group14-sha1-"
  #define KEX_GSS_GEX_SHA1_ID				"gss-gex-sha1-"
  
  typedef struct {
  	char *filename;
  	char *envvar;
  	char *envval;
  	struct passwd *owner;
  	void *data;
  } ssh_gssapi_ccache;
  
  typedef struct {
  	gss_buffer_desc displayname;
  	gss_buffer_desc exportedname;
  	gss_cred_id_t creds;
  	gss_name_t name;
  	struct ssh_gssapi_mech_struct *mech;
  	ssh_gssapi_ccache store;
      gss_ctx_id_t context; /* needed for globus_gss_assist_map_and_authorize() */
  	int used;
  	int updated;
  } ssh_gssapi_client;
  
  typedef struct ssh_gssapi_mech_struct {
  	char *enc_name;
  	char *name;
  	gss_OID_desc oid;
  	int (*dochild) (ssh_gssapi_client *);
  	int (*userok) (ssh_gssapi_client *, char *);
  	int (*localname) (ssh_gssapi_client *, char **);
  	void (*storecreds) (ssh_gssapi_client *);
  	int (*updatecreds) (ssh_gssapi_ccache *, ssh_gssapi_client *);
  } ssh_gssapi_mech;
  
  typedef struct {
  	OM_uint32	major; /* both */
  	OM_uint32	minor; /* both */
  	gss_ctx_id_t	context; /* both */
  	gss_name_t	name; /* both */
  	gss_OID		oid; /* both */
  	gss_cred_id_t	creds; /* server */
  	gss_name_t	client; /* server */
  	gss_cred_id_t	client_creds; /* both */
  } Gssctxt;
  
  extern ssh_gssapi_mech *supported_mechs[];
  extern Gssctxt *gss_kex_context;
  
  int  ssh_gssapi_check_oid(Gssctxt *, void *, size_t);
  void ssh_gssapi_set_oid_data(Gssctxt *, void *, size_t);
  void ssh_gssapi_set_oid(Gssctxt *, gss_OID);
  void ssh_gssapi_supported_oids(gss_OID_set *);
  ssh_gssapi_mech *ssh_gssapi_get_ctype(Gssctxt *);
  
  OM_uint32 ssh_gssapi_import_name(Gssctxt *, const char *);
  OM_uint32 ssh_gssapi_init_ctx(Gssctxt *, int,
      gss_buffer_desc *, gss_buffer_desc *, OM_uint32 *);
  OM_uint32 ssh_gssapi_accept_ctx(Gssctxt *,
      gss_buffer_desc *, gss_buffer_desc *, OM_uint32 *);
  OM_uint32 ssh_gssapi_getclient(Gssctxt *, ssh_gssapi_client *);
  void ssh_gssapi_error(Gssctxt *);
  char *ssh_gssapi_last_error(Gssctxt *, OM_uint32 *, OM_uint32 *);
  void ssh_gssapi_build_ctx(Gssctxt **);
  void ssh_gssapi_delete_ctx(Gssctxt **);
  OM_uint32 ssh_gssapi_sign(Gssctxt *, gss_buffer_t, gss_buffer_t);
  void ssh_gssapi_buildmic(Buffer *, const char *, const char *, const char *);
  int ssh_gssapi_check_mechanism(Gssctxt **, gss_OID, const char *, const char *);
  OM_uint32 ssh_gssapi_client_identity(Gssctxt *, const char *);
  int ssh_gssapi_credentials_updated(Gssctxt *);
  
  int ssh_gssapi_localname(char **name);
  void ssh_gssapi_rekey_creds();
  
  /* In the server */
  typedef int ssh_gssapi_check_fn(Gssctxt **, gss_OID, const char *, 
      const char *);
  char *ssh_gssapi_client_mechanisms(const char *, const char *);
  char *ssh_gssapi_kex_mechs(gss_OID_set, ssh_gssapi_check_fn *, const char *,
      const char *);
  gss_OID ssh_gssapi_id_kex(Gssctxt *, char *, int);
  int ssh_gssapi_server_check_mech(Gssctxt **,gss_OID, const char *, 
      const char *);
  OM_uint32 ssh_gssapi_server_ctx(Gssctxt **, gss_OID);
  int ssh_gssapi_userok(char *name, struct passwd *, int gssapi_keyex);
  OM_uint32 ssh_gssapi_checkmic(Gssctxt *, gss_buffer_t, gss_buffer_t);
  void ssh_gssapi_do_child(char ***, u_int *);
  void ssh_gssapi_cleanup_creds(void);
  void ssh_gssapi_storecreds(void);
  
  #ifdef MECHGLUE
  gss_cred_id_t __gss_get_mechanism_cred
     (gss_cred_id_t,	/* union_cred */
      gss_OID		/* mech_type */
     );
  #endif
  
  char *ssh_gssapi_server_mechanisms(void);
  int ssh_gssapi_oid_table_ok();
  
  int ssh_gssapi_update_creds(ssh_gssapi_ccache *store);
  void ssh_gssapi_get_client_info(char **userdn, char **mech);
  #endif /* GSSAPI */
  
  #endif /* _SSH_GSS_H */
  