1 /* $NetBSD: ssh-gss.h,v 1.10 2021/03/05 17:47:16 christos Exp $ */ 2 /* $OpenBSD: ssh-gss.h,v 1.15 2021/01/27 10:05:28 djm Exp $ */ 3 4 /* 5 * Copyright (c) 2001-2003 Simon Wilkinson. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR `AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #ifndef _SSH_GSS_H 29 #define _SSH_GSS_H 30 31 #ifdef GSSAPI 32 33 #include <gssapi.h> 34 35 /* draft-ietf-secsh-gsskeyex-06 */ 36 #define SSH2_MSG_USERAUTH_GSSAPI_RESPONSE 60 37 #define SSH2_MSG_USERAUTH_GSSAPI_TOKEN 61 38 #define SSH2_MSG_USERAUTH_GSSAPI_EXCHANGE_COMPLETE 63 39 #define SSH2_MSG_USERAUTH_GSSAPI_ERROR 64 40 #define SSH2_MSG_USERAUTH_GSSAPI_ERRTOK 65 41 #define SSH2_MSG_USERAUTH_GSSAPI_MIC 66 42 43 #define SSH_GSS_OIDTYPE 0x06 44 45 typedef struct { 46 char *filename; 47 char *envvar; 48 char *envval; 49 void *data; 50 } ssh_gssapi_ccache; 51 52 typedef struct { 53 gss_buffer_desc displayname; 54 gss_buffer_desc exportedname; 55 gss_cred_id_t creds; 56 struct ssh_gssapi_mech_struct *mech; 57 ssh_gssapi_ccache store; 58 } ssh_gssapi_client; 59 60 typedef struct ssh_gssapi_mech_struct { 61 const char *enc_name; 62 const char *name; 63 gss_OID_desc oid; 64 int (*dochild) (ssh_gssapi_client *); 65 int (*userok) (ssh_gssapi_client *, char *); 66 int (*localname) (ssh_gssapi_client *, char **); 67 void (*storecreds) (ssh_gssapi_client *); 68 } ssh_gssapi_mech; 69 70 typedef struct { 71 OM_uint32 major; /* both */ 72 OM_uint32 minor; /* both */ 73 gss_ctx_id_t context; /* both */ 74 gss_name_t name; /* both */ 75 gss_OID oid; /* client */ 76 gss_cred_id_t creds; /* server */ 77 gss_name_t client; /* server */ 78 gss_cred_id_t client_creds; /* server */ 79 } Gssctxt; 80 81 extern ssh_gssapi_mech *supported_mechs[]; 82 83 int ssh_gssapi_check_oid(Gssctxt *, void *, size_t); 84 void ssh_gssapi_set_oid_data(Gssctxt *, void *, size_t); 85 void ssh_gssapi_set_oid(Gssctxt *, gss_OID); 86 void ssh_gssapi_supported_oids(gss_OID_set *); 87 ssh_gssapi_mech *ssh_gssapi_get_ctype(Gssctxt *); 88 void ssh_gssapi_prepare_supported_oids(void); 89 OM_uint32 ssh_gssapi_test_oid_supported(OM_uint32 *, gss_OID, int *); 90 91 struct sshbuf; 92 int ssh_gssapi_get_buffer_desc(struct sshbuf *, gss_buffer_desc *); 93 94 OM_uint32 ssh_gssapi_import_name(Gssctxt *, const char *); 95 OM_uint32 ssh_gssapi_init_ctx(Gssctxt *, int, 96 gss_buffer_desc *, gss_buffer_desc *, OM_uint32 *); 97 OM_uint32 ssh_gssapi_accept_ctx(Gssctxt *, 98 gss_buffer_desc *, gss_buffer_desc *, OM_uint32 *); 99 OM_uint32 ssh_gssapi_getclient(Gssctxt *, ssh_gssapi_client *); 100 void ssh_gssapi_error(Gssctxt *); 101 char *ssh_gssapi_last_error(Gssctxt *, OM_uint32 *, OM_uint32 *); 102 void ssh_gssapi_build_ctx(Gssctxt **); 103 void ssh_gssapi_delete_ctx(Gssctxt **); 104 OM_uint32 ssh_gssapi_sign(Gssctxt *, gss_buffer_t, gss_buffer_t); 105 void ssh_gssapi_buildmic(struct sshbuf *, const char *, 106 const char *, const char *, const struct sshbuf *); 107 int ssh_gssapi_check_mechanism(Gssctxt **, gss_OID, const char *); 108 109 /* In the server */ 110 OM_uint32 ssh_gssapi_server_ctx(Gssctxt **, gss_OID); 111 int ssh_gssapi_userok(char *name); 112 OM_uint32 ssh_gssapi_checkmic(Gssctxt *, gss_buffer_t, gss_buffer_t); 113 void ssh_gssapi_do_child(char ***, u_int *); 114 void ssh_gssapi_cleanup_creds(void); 115 void ssh_gssapi_storecreds(void); 116 const char *ssh_gssapi_displayname(void); 117 118 #endif /* GSSAPI */ 119 120 #endif /* _SSH_GSS_H */ 121