1/* $OpenBSD: ssh-gss.h,v 1.16 2024/05/17 06:42:04 jsg 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 <gssapi.h> 32 33/* draft-ietf-secsh-gsskeyex-06 */ 34#define SSH2_MSG_USERAUTH_GSSAPI_RESPONSE 60 35#define SSH2_MSG_USERAUTH_GSSAPI_TOKEN 61 36#define SSH2_MSG_USERAUTH_GSSAPI_EXCHANGE_COMPLETE 63 37#define SSH2_MSG_USERAUTH_GSSAPI_ERROR 64 38#define SSH2_MSG_USERAUTH_GSSAPI_ERRTOK 65 39#define SSH2_MSG_USERAUTH_GSSAPI_MIC 66 40 41#define SSH_GSS_OIDTYPE 0x06 42 43typedef struct { 44 char *filename; 45 char *envvar; 46 char *envval; 47 void *data; 48} ssh_gssapi_ccache; 49 50typedef struct { 51 gss_buffer_desc displayname; 52 gss_buffer_desc exportedname; 53 gss_cred_id_t creds; 54 struct ssh_gssapi_mech_struct *mech; 55 ssh_gssapi_ccache store; 56} ssh_gssapi_client; 57 58typedef struct ssh_gssapi_mech_struct { 59 char *enc_name; 60 char *name; 61 gss_OID_desc oid; 62 int (*dochild) (ssh_gssapi_client *); 63 int (*userok) (ssh_gssapi_client *, char *); 64 int (*localname) (ssh_gssapi_client *, char **); 65 void (*storecreds) (ssh_gssapi_client *); 66} ssh_gssapi_mech; 67 68typedef struct { 69 OM_uint32 major; /* both */ 70 OM_uint32 minor; /* both */ 71 gss_ctx_id_t context; /* both */ 72 gss_name_t name; /* both */ 73 gss_OID oid; /* client */ 74 gss_cred_id_t creds; /* server */ 75 gss_name_t client; /* server */ 76 gss_cred_id_t client_creds; /* server */ 77} Gssctxt; 78 79extern ssh_gssapi_mech *supported_mechs[]; 80 81int ssh_gssapi_check_oid(Gssctxt *, void *, size_t); 82void ssh_gssapi_set_oid_data(Gssctxt *, void *, size_t); 83void ssh_gssapi_set_oid(Gssctxt *, gss_OID); 84void ssh_gssapi_supported_oids(gss_OID_set *); 85void ssh_gssapi_prepare_supported_oids(void); 86OM_uint32 ssh_gssapi_test_oid_supported(OM_uint32 *, gss_OID, int *); 87 88struct sshbuf; 89int ssh_gssapi_get_buffer_desc(struct sshbuf *, gss_buffer_desc *); 90 91OM_uint32 ssh_gssapi_import_name(Gssctxt *, const char *); 92OM_uint32 ssh_gssapi_init_ctx(Gssctxt *, int, 93 gss_buffer_desc *, gss_buffer_desc *, OM_uint32 *); 94OM_uint32 ssh_gssapi_accept_ctx(Gssctxt *, 95 gss_buffer_desc *, gss_buffer_desc *, OM_uint32 *); 96OM_uint32 ssh_gssapi_getclient(Gssctxt *, ssh_gssapi_client *); 97void ssh_gssapi_error(Gssctxt *); 98char *ssh_gssapi_last_error(Gssctxt *, OM_uint32 *, OM_uint32 *); 99void ssh_gssapi_build_ctx(Gssctxt **); 100void ssh_gssapi_delete_ctx(Gssctxt **); 101OM_uint32 ssh_gssapi_sign(Gssctxt *, gss_buffer_t, gss_buffer_t); 102void ssh_gssapi_buildmic(struct sshbuf *, const char *, 103 const char *, const char *, const struct sshbuf *); 104int ssh_gssapi_check_mechanism(Gssctxt **, gss_OID, const char *); 105 106/* In the server */ 107OM_uint32 ssh_gssapi_server_ctx(Gssctxt **, gss_OID); 108int ssh_gssapi_userok(char *name); 109OM_uint32 ssh_gssapi_checkmic(Gssctxt *, gss_buffer_t, gss_buffer_t); 110void ssh_gssapi_do_child(char ***, u_int *); 111void ssh_gssapi_cleanup_creds(void); 112void ssh_gssapi_storecreds(void); 113const char *ssh_gssapi_displayname(void); 114 115#endif /* GSSAPI */ 116 117#endif /* _SSH_GSS_H */ 118