1 /* $OpenBSD: ssh-gss.h,v 1.11 2014/02/26 20:28:44 djm Exp $ */ 2 /* $FreeBSD$ */ 3 /* 4 * Copyright (c) 2001-2003 Simon Wilkinson. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR `AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #ifndef _SSH_GSS_H 28 #define _SSH_GSS_H 29 30 #ifdef GSSAPI 31 32 #if defined(HAVE_GSSAPI_GSSAPI_H) 33 #include <gssapi/gssapi.h> 34 #elif defined(HAVE_GSSAPI_H) 35 #include <gssapi.h> 36 #endif 37 38 #ifdef KRB5 39 # ifndef HEIMDAL 40 # ifdef HAVE_GSSAPI_GENERIC_H 41 # include <gssapi_generic.h> 42 # elif defined(HAVE_GSSAPI_GSSAPI_GENERIC_H) 43 # include <gssapi/gssapi_generic.h> 44 # endif 45 46 /* Old MIT Kerberos doesn't seem to define GSS_NT_HOSTBASED_SERVICE */ 47 48 # if !HAVE_DECL_GSS_C_NT_HOSTBASED_SERVICE 49 # define GSS_C_NT_HOSTBASED_SERVICE gss_nt_service_name 50 # endif /* !HAVE_DECL_GSS_C_NT_... */ 51 52 # endif /* !HEIMDAL */ 53 #endif /* KRB5 */ 54 55 /* draft-ietf-secsh-gsskeyex-06 */ 56 #define SSH2_MSG_USERAUTH_GSSAPI_RESPONSE 60 57 #define SSH2_MSG_USERAUTH_GSSAPI_TOKEN 61 58 #define SSH2_MSG_USERAUTH_GSSAPI_EXCHANGE_COMPLETE 63 59 #define SSH2_MSG_USERAUTH_GSSAPI_ERROR 64 60 #define SSH2_MSG_USERAUTH_GSSAPI_ERRTOK 65 61 #define SSH2_MSG_USERAUTH_GSSAPI_MIC 66 62 63 #define SSH_GSS_OIDTYPE 0x06 64 65 typedef struct { 66 char *filename; 67 char *envvar; 68 char *envval; 69 void *data; 70 } ssh_gssapi_ccache; 71 72 typedef struct { 73 gss_buffer_desc displayname; 74 gss_buffer_desc exportedname; 75 gss_cred_id_t creds; 76 struct ssh_gssapi_mech_struct *mech; 77 ssh_gssapi_ccache store; 78 } ssh_gssapi_client; 79 80 typedef struct ssh_gssapi_mech_struct { 81 char *enc_name; 82 char *name; 83 gss_OID_desc oid; 84 int (*dochild) (ssh_gssapi_client *); 85 int (*userok) (ssh_gssapi_client *, char *); 86 int (*localname) (ssh_gssapi_client *, char **); 87 void (*storecreds) (ssh_gssapi_client *); 88 } ssh_gssapi_mech; 89 90 typedef struct { 91 OM_uint32 major; /* both */ 92 OM_uint32 minor; /* both */ 93 gss_ctx_id_t context; /* both */ 94 gss_name_t name; /* both */ 95 gss_OID oid; /* client */ 96 gss_cred_id_t creds; /* server */ 97 gss_name_t client; /* server */ 98 gss_cred_id_t client_creds; /* server */ 99 } Gssctxt; 100 101 extern ssh_gssapi_mech *supported_mechs[]; 102 103 int ssh_gssapi_check_oid(Gssctxt *, void *, size_t); 104 void ssh_gssapi_set_oid_data(Gssctxt *, void *, size_t); 105 void ssh_gssapi_set_oid(Gssctxt *, gss_OID); 106 void ssh_gssapi_supported_oids(gss_OID_set *); 107 ssh_gssapi_mech *ssh_gssapi_get_ctype(Gssctxt *); 108 void ssh_gssapi_prepare_supported_oids(void); 109 OM_uint32 ssh_gssapi_test_oid_supported(OM_uint32 *, gss_OID, int *); 110 111 OM_uint32 ssh_gssapi_import_name(Gssctxt *, const char *); 112 OM_uint32 ssh_gssapi_init_ctx(Gssctxt *, int, 113 gss_buffer_desc *, gss_buffer_desc *, OM_uint32 *); 114 OM_uint32 ssh_gssapi_accept_ctx(Gssctxt *, 115 gss_buffer_desc *, gss_buffer_desc *, OM_uint32 *); 116 OM_uint32 ssh_gssapi_getclient(Gssctxt *, ssh_gssapi_client *); 117 void ssh_gssapi_error(Gssctxt *); 118 char *ssh_gssapi_last_error(Gssctxt *, OM_uint32 *, OM_uint32 *); 119 void ssh_gssapi_build_ctx(Gssctxt **); 120 void ssh_gssapi_delete_ctx(Gssctxt **); 121 OM_uint32 ssh_gssapi_sign(Gssctxt *, gss_buffer_t, gss_buffer_t); 122 void ssh_gssapi_buildmic(Buffer *, const char *, const char *, const char *); 123 int ssh_gssapi_check_mechanism(Gssctxt **, gss_OID, const char *); 124 125 /* In the server */ 126 OM_uint32 ssh_gssapi_server_ctx(Gssctxt **, gss_OID); 127 int ssh_gssapi_userok(char *name); 128 OM_uint32 ssh_gssapi_checkmic(Gssctxt *, gss_buffer_t, gss_buffer_t); 129 void ssh_gssapi_do_child(char ***, u_int *); 130 void ssh_gssapi_cleanup_creds(void); 131 void ssh_gssapi_storecreds(void); 132 133 #endif /* GSSAPI */ 134 135 #endif /* _SSH_GSS_H */ 136