1 /* $OpenBSD: ssh-gss.h,v 1.10 2007/06/12 08:20:00 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 /* 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_init_ctx(Gssctxt *, int, 109 gss_buffer_desc *, gss_buffer_desc *, OM_uint32 *); 110 OM_uint32 ssh_gssapi_accept_ctx(Gssctxt *, 111 gss_buffer_desc *, gss_buffer_desc *, OM_uint32 *); 112 OM_uint32 ssh_gssapi_getclient(Gssctxt *, ssh_gssapi_client *); 113 void ssh_gssapi_error(Gssctxt *); 114 char *ssh_gssapi_last_error(Gssctxt *, OM_uint32 *, OM_uint32 *); 115 void ssh_gssapi_build_ctx(Gssctxt **); 116 void ssh_gssapi_delete_ctx(Gssctxt **); 117 OM_uint32 ssh_gssapi_sign(Gssctxt *, gss_buffer_t, gss_buffer_t); 118 void ssh_gssapi_buildmic(Buffer *, const char *, const char *, const char *); 119 int ssh_gssapi_check_mechanism(Gssctxt **, gss_OID, const char *); 120 121 /* In the server */ 122 OM_uint32 ssh_gssapi_server_ctx(Gssctxt **, gss_OID); 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 */ 132