source: trunk/third/openssh/ssh-gss.h @ 18763

/*
 * Copyright (c) 2001,2002 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

#include "kex.h"
#include "buffer.h"

#include <gssapi.h>

#ifdef KRB5
#ifndef HEIMDAL
#include <gssapi_generic.h>

/* MIT Kerberos doesn't seem to define GSS_NT_HOSTBASED_SERVICE */

#ifndef GSS_C_NT_HOSTBASED_SERVICE
#define GSS_C_NT_HOSTBASED_SERVICE gss_nt_service_name
#endif /* GSS_C_NT_... */
#endif /* !HEIMDAL */
#endif /* KRB5 */

/* draft-ietf-secsh-gsskeyex-03 */
#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_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 KEX_GSS_SHA1                                    "gss-group1-sha1-"

enum ssh_gss_id {
#ifdef KRB5
        GSS_KERBEROS,
#endif
#ifdef GSI
        GSS_GSI,
#endif /* GSI */
        GSS_LAST_ENTRY
};

typedef struct ssh_gss_mech_struct {
        char *enc_name;
        char *name;
        gss_OID_desc oid;
} ssh_gssapi_mech;

typedef struct {
        OM_uint32       status; /* both */
        gss_ctx_id_t    context; /* both */
        gss_name_t      name; /* both */
        gss_OID         oid; /* client */
        gss_cred_id_t   creds; /* server */
        gss_name_t      client; /* server */
        gss_cred_id_t   client_creds; /* server */
} Gssctxt;

extern ssh_gssapi_mech supported_mechs[];
extern gss_buffer_desc gssapi_client_name;
extern gss_cred_id_t   gssapi_client_creds;
extern enum ssh_gss_id gssapi_client_type;

char *ssh_gssapi_mechanisms(int server, char *host);
gss_OID ssh_gssapi_id_kex(Gssctxt *ctx, char *name);
void ssh_gssapi_set_oid_data(Gssctxt *ctx, void *data, size_t len);
void ssh_gssapi_set_oid(Gssctxt *ctx, gss_OID oid);
void ssh_gssapi_supported_oids(gss_OID_set *oidset);
enum ssh_gss_id ssh_gssapi_get_ctype(Gssctxt *ctxt);

OM_uint32 ssh_gssapi_import_name(Gssctxt *ctx, const char *host);
OM_uint32 ssh_gssapi_acquire_cred(Gssctxt *ctx);
OM_uint32 ssh_gssapi_init_ctx(Gssctxt *ctx, int deleg_creds,
                              gss_buffer_desc *recv_tok, 
                              gss_buffer_desc *send_tok, OM_uint32 *flags);
OM_uint32 ssh_gssapi_accept_ctx(Gssctxt *ctx,
                                gss_buffer_desc *recv_tok,
                                gss_buffer_desc *send_tok,
                                OM_uint32 *flags);
OM_uint32 ssh_gssapi_getclient(Gssctxt *ctx,
                                enum ssh_gss_id *type,
                                gss_buffer_desc *name,
                                gss_cred_id_t *creds);
void ssh_gssapi_error(OM_uint32 major_status,OM_uint32 minor_status);
void ssh_gssapi_build_ctx(Gssctxt **ctx);
void ssh_gssapi_delete_ctx(Gssctxt **ctx);
OM_uint32 ssh_gssapi_client_ctx(Gssctxt **ctx,gss_OID oid,char *host);
OM_uint32 ssh_gssapi_server_ctx(Gssctxt **ctx,gss_OID oid);

/* In the client */
void ssh_gssapi_client(Kex *kex, char *host, struct sockaddr *hostaddr,
                       Buffer *client_kexinit, Buffer *server_kexinit);

/* In the server */
void ssh_gssapi_server(Kex *kex, Buffer *client_kexinit, 
                       Buffer *server_kexinit);

OM_uint32 ssh_gssapi_sign(Gssctxt *ctx, gss_buffer_desc *buffer, 
                                        gss_buffer_desc *hash);

void ssh_gssapi_do_child(char ***envp, u_int *envsizep);                 
void ssh_gssapi_cleanup_creds(void *ignored);
#endif /* GSSAPI */

#endif /* _SSH_GSS_H */