1/* $OpenBSD: ssh-gss.h,v 1.11 2014/02/26 20:28:44 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#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/* Old MIT Kerberos doesn't seem to define GSS_NT_HOSTBASED_SERVICE */ 46 47# if !HAVE_DECL_GSS_C_NT_HOSTBASED_SERVICE 48# define GSS_C_NT_HOSTBASED_SERVICE gss_nt_service_name 49# endif /* !HAVE_DECL_GSS_C_NT_... */ 50 51# endif /* !HEIMDAL */ 52#endif /* KRB5 */ 53 54/* draft-ietf-secsh-gsskeyex-06 */ 55#define SSH2_MSG_USERAUTH_GSSAPI_RESPONSE 60 56#define SSH2_MSG_USERAUTH_GSSAPI_TOKEN 61 57#define SSH2_MSG_USERAUTH_GSSAPI_EXCHANGE_COMPLETE 63 58#define SSH2_MSG_USERAUTH_GSSAPI_ERROR 64 59#define SSH2_MSG_USERAUTH_GSSAPI_ERRTOK 65 60#define SSH2_MSG_USERAUTH_GSSAPI_MIC 66 61 62#define SSH_GSS_OIDTYPE 0x06 63 64typedef struct { 65 char *filename; 66 char *envvar; 67 char *envval; 68 void *data; 69} ssh_gssapi_ccache; 70 71typedef struct { 72 gss_buffer_desc displayname; 73 gss_buffer_desc exportedname; 74 gss_cred_id_t creds; 75 struct ssh_gssapi_mech_struct *mech; 76 ssh_gssapi_ccache store; 77} ssh_gssapi_client; 78 79typedef struct ssh_gssapi_mech_struct { 80 char *enc_name; 81 char *name; 82 gss_OID_desc oid; 83 int (*dochild) (ssh_gssapi_client *); 84 int (*userok) (ssh_gssapi_client *, char *); 85 int (*localname) (ssh_gssapi_client *, char **); 86 void (*storecreds) (ssh_gssapi_client *); 87} ssh_gssapi_mech; 88 89typedef struct { 90 OM_uint32 major; /* both */ 91 OM_uint32 minor; /* both */ 92 gss_ctx_id_t context; /* both */ 93 gss_name_t name; /* both */ 94 gss_OID oid; /* client */ 95 gss_cred_id_t creds; /* server */ 96 gss_name_t client; /* server */ 97 gss_cred_id_t client_creds; /* server */ 98} Gssctxt; 99 100extern ssh_gssapi_mech *supported_mechs[]; 101 102int ssh_gssapi_check_oid(Gssctxt *, void *, size_t); 103void ssh_gssapi_set_oid_data(Gssctxt *, void *, size_t); 104void ssh_gssapi_set_oid(Gssctxt *, gss_OID); 105void ssh_gssapi_supported_oids(gss_OID_set *); 106ssh_gssapi_mech *ssh_gssapi_get_ctype(Gssctxt *); 107void ssh_gssapi_prepare_supported_oids(void); 108OM_uint32 ssh_gssapi_test_oid_supported(OM_uint32 *, gss_OID, int *); 109 110OM_uint32 ssh_gssapi_import_name(Gssctxt *, const char *); 111OM_uint32 ssh_gssapi_init_ctx(Gssctxt *, int, 112 gss_buffer_desc *, gss_buffer_desc *, OM_uint32 *); 113OM_uint32 ssh_gssapi_accept_ctx(Gssctxt *, 114 gss_buffer_desc *, gss_buffer_desc *, OM_uint32 *); 115OM_uint32 ssh_gssapi_getclient(Gssctxt *, ssh_gssapi_client *); 116void ssh_gssapi_error(Gssctxt *); 117char *ssh_gssapi_last_error(Gssctxt *, OM_uint32 *, OM_uint32 *); 118void ssh_gssapi_build_ctx(Gssctxt **); 119void ssh_gssapi_delete_ctx(Gssctxt **); 120OM_uint32 ssh_gssapi_sign(Gssctxt *, gss_buffer_t, gss_buffer_t); 121void ssh_gssapi_buildmic(Buffer *, const char *, const char *, const char *); 122int ssh_gssapi_check_mechanism(Gssctxt **, gss_OID, const char *); 123 124/* In the server */ 125OM_uint32 ssh_gssapi_server_ctx(Gssctxt **, gss_OID); 126int ssh_gssapi_userok(char *name); 127OM_uint32 ssh_gssapi_checkmic(Gssctxt *, gss_buffer_t, gss_buffer_t); 128void ssh_gssapi_do_child(char ***, u_int *); 129void ssh_gssapi_cleanup_creds(void); 130void ssh_gssapi_storecreds(void); 131 132#endif /* GSSAPI */ 133 134#endif /* _SSH_GSS_H */ 135