1/* $OpenBSD: ssh-gss.h,v 1.10 2007/06/12 08:20:00 djm Exp $ */ 2/* 3 * Copyright (c) 2001-2009 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 64#define SSH2_MSG_KEXGSS_INIT 30 65#define SSH2_MSG_KEXGSS_CONTINUE 31 66#define SSH2_MSG_KEXGSS_COMPLETE 32 67#define SSH2_MSG_KEXGSS_HOSTKEY 33 68#define SSH2_MSG_KEXGSS_ERROR 34 69#define SSH2_MSG_KEXGSS_GROUPREQ 40 70#define SSH2_MSG_KEXGSS_GROUP 41 71#define KEX_GSS_GRP1_SHA1_ID "gss-group1-sha1-" 72#define KEX_GSS_GRP14_SHA1_ID "gss-group14-sha1-" 73#define KEX_GSS_GEX_SHA1_ID "gss-gex-sha1-" 74 75typedef struct { 76 char *filename; 77 char *envvar; 78 char *envval; 79 struct passwd *owner; 80 void *data; 81} ssh_gssapi_ccache; 82 83typedef struct { 84 gss_buffer_desc displayname; 85 gss_buffer_desc exportedname; 86 gss_cred_id_t creds; 87 gss_name_t name; 88 struct ssh_gssapi_mech_struct *mech; 89 ssh_gssapi_ccache store; 90 int used; 91 int updated; 92} ssh_gssapi_client; 93 94typedef struct ssh_gssapi_mech_struct { 95 char *enc_name; 96 char *name; 97 gss_OID_desc oid; 98 int (*dochild) (ssh_gssapi_client *); 99 int (*userok) (ssh_gssapi_client *, char *); 100 int (*localname) (ssh_gssapi_client *, char **); 101 void (*storecreds) (ssh_gssapi_client *); 102 int (*updatecreds) (ssh_gssapi_ccache *, ssh_gssapi_client *); 103} ssh_gssapi_mech; 104 105typedef struct { 106 OM_uint32 major; /* both */ 107 OM_uint32 minor; /* both */ 108 gss_ctx_id_t context; /* both */ 109 gss_name_t name; /* both */ 110 gss_OID oid; /* client */ 111 gss_cred_id_t creds; /* server */ 112 gss_name_t client; /* server */ 113 gss_cred_id_t client_creds; /* both */ 114} Gssctxt; 115 116extern ssh_gssapi_mech *supported_mechs[]; 117extern Gssctxt *gss_kex_context; 118 119int ssh_gssapi_check_oid(Gssctxt *, void *, size_t); 120void ssh_gssapi_set_oid_data(Gssctxt *, void *, size_t); 121void ssh_gssapi_set_oid(Gssctxt *, gss_OID); 122void ssh_gssapi_supported_oids(gss_OID_set *); 123ssh_gssapi_mech *ssh_gssapi_get_ctype(Gssctxt *); 124 125OM_uint32 ssh_gssapi_import_name(Gssctxt *, const char *); 126OM_uint32 ssh_gssapi_init_ctx(Gssctxt *, int, 127 gss_buffer_desc *, gss_buffer_desc *, OM_uint32 *); 128OM_uint32 ssh_gssapi_accept_ctx(Gssctxt *, 129 gss_buffer_desc *, gss_buffer_desc *, OM_uint32 *); 130OM_uint32 ssh_gssapi_getclient(Gssctxt *, ssh_gssapi_client *); 131void ssh_gssapi_error(Gssctxt *); 132char *ssh_gssapi_last_error(Gssctxt *, OM_uint32 *, OM_uint32 *); 133void ssh_gssapi_build_ctx(Gssctxt **); 134void ssh_gssapi_delete_ctx(Gssctxt **); 135OM_uint32 ssh_gssapi_sign(Gssctxt *, gss_buffer_t, gss_buffer_t); 136void ssh_gssapi_buildmic(Buffer *, const char *, const char *, const char *); 137int ssh_gssapi_check_mechanism(Gssctxt **, gss_OID, const char *, const char *); 138OM_uint32 ssh_gssapi_client_identity(Gssctxt *, const char *); 139int ssh_gssapi_credentials_updated(Gssctxt *); 140 141/* In the server */ 142typedef int ssh_gssapi_check_fn(Gssctxt **, gss_OID, const char *, 143 const char *); 144char *ssh_gssapi_client_mechanisms(const char *, const char *); 145char *ssh_gssapi_kex_mechs(gss_OID_set, ssh_gssapi_check_fn *, const char *, 146 const char *); 147gss_OID ssh_gssapi_id_kex(Gssctxt *, char *, int); 148int ssh_gssapi_server_check_mech(Gssctxt **,gss_OID, const char *, 149 const char *); 150OM_uint32 ssh_gssapi_server_ctx(Gssctxt **, gss_OID); 151int ssh_gssapi_userok(char *name, struct passwd *); 152OM_uint32 ssh_gssapi_checkmic(Gssctxt *, gss_buffer_t, gss_buffer_t); 153void ssh_gssapi_do_child(char ***, u_int *); 154void ssh_gssapi_cleanup_creds(void); 155void ssh_gssapi_storecreds(void); 156 157char *ssh_gssapi_server_mechanisms(void); 158int ssh_gssapi_oid_table_ok(); 159 160int ssh_gssapi_update_creds(ssh_gssapi_ccache *store); 161#endif /* GSSAPI */ 162 163#endif /* _SSH_GSS_H */ 164