1 /* $OpenBSD: ssh-gss.h,v 1.4 2003/11/17 11:06:07 markus 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 #include "buffer.h" 32 33 #ifdef HAVE_GSSAPI_H 34 #include <gssapi.h> 35 #elif defined(HAVE_GSSAPI_GSSAPI_H) 36 #include <gssapi/gssapi.h> 37 #endif 38 39 #ifdef KRB5 40 # ifndef HEIMDAL 41 # ifdef HAVE_GSSAPI_GENERIC_H 42 # include <gssapi_generic.h> 43 # elif defined(HAVE_GSSAPI_GSSAPI_GENERIC_H) 44 # include <gssapi/gssapi_generic.h> 45 # endif 46 47 /* MIT Kerberos doesn't seem to define GSS_NT_HOSTBASED_SERVICE */ 48 49 #ifndef GSS_C_NT_HOSTBASED_SERVICE 50 #define GSS_C_NT_HOSTBASED_SERVICE gss_nt_service_name 51 #endif /* GSS_C_NT_... */ 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 *ctx, void *data, size_t len); 104 void ssh_gssapi_set_oid_data(Gssctxt *ctx, void *data, size_t len); 105 void ssh_gssapi_set_oid(Gssctxt *ctx, gss_OID oid); 106 void ssh_gssapi_supported_oids(gss_OID_set *oidset); 107 ssh_gssapi_mech *ssh_gssapi_get_ctype(Gssctxt *ctxt); 108 109 OM_uint32 ssh_gssapi_import_name(Gssctxt *ctx, const char *host); 110 OM_uint32 ssh_gssapi_acquire_cred(Gssctxt *ctx); 111 OM_uint32 ssh_gssapi_init_ctx(Gssctxt *ctx, int deleg_creds, 112 gss_buffer_desc *recv_tok, gss_buffer_desc *send_tok, OM_uint32 *flags); 113 OM_uint32 ssh_gssapi_accept_ctx(Gssctxt *ctx, 114 gss_buffer_desc *recv_tok, gss_buffer_desc *send_tok, OM_uint32 *flags); 115 OM_uint32 ssh_gssapi_getclient(Gssctxt *ctx, ssh_gssapi_client *); 116 void ssh_gssapi_error(Gssctxt *ctx); 117 char *ssh_gssapi_last_error(Gssctxt *ctxt, OM_uint32 *maj, OM_uint32 *min); 118 void ssh_gssapi_build_ctx(Gssctxt **ctx); 119 void ssh_gssapi_delete_ctx(Gssctxt **ctx); 120 OM_uint32 ssh_gssapi_sign(Gssctxt *, gss_buffer_t, gss_buffer_t); 121 OM_uint32 ssh_gssapi_server_ctx(Gssctxt **ctx, gss_OID oid); 122 void ssh_gssapi_buildmic(Buffer *, const char *, const char *, const char *); 123 124 /* In the server */ 125 int ssh_gssapi_userok(char *name); 126 OM_uint32 ssh_gssapi_checkmic(Gssctxt *, gss_buffer_t, gss_buffer_t); 127 void ssh_gssapi_do_child(char ***envp, u_int *envsizep); 128 void ssh_gssapi_cleanup_creds(void); 129 void ssh_gssapi_storecreds(void); 130 131 #endif /* GSSAPI */ 132 133 #endif /* _SSH_GSS_H */ 134