1 /* $OpenBSD: ssh-gss.h,v 1.15 2021/01/27 10:05:28 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 #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 43 typedef struct { 44 char *filename; 45 char *envvar; 46 char *envval; 47 void *data; 48 } ssh_gssapi_ccache; 49 50 typedef 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 58 typedef 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 68 typedef 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 79 extern ssh_gssapi_mech *supported_mechs[]; 80 81 int ssh_gssapi_check_oid(Gssctxt *, void *, size_t); 82 void ssh_gssapi_set_oid_data(Gssctxt *, void *, size_t); 83 void ssh_gssapi_set_oid(Gssctxt *, gss_OID); 84 void ssh_gssapi_supported_oids(gss_OID_set *); 85 ssh_gssapi_mech *ssh_gssapi_get_ctype(Gssctxt *); 86 void ssh_gssapi_prepare_supported_oids(void); 87 OM_uint32 ssh_gssapi_test_oid_supported(OM_uint32 *, gss_OID, int *); 88 89 struct sshbuf; 90 int ssh_gssapi_get_buffer_desc(struct sshbuf *, gss_buffer_desc *); 91 92 OM_uint32 ssh_gssapi_import_name(Gssctxt *, const char *); 93 OM_uint32 ssh_gssapi_init_ctx(Gssctxt *, int, 94 gss_buffer_desc *, gss_buffer_desc *, OM_uint32 *); 95 OM_uint32 ssh_gssapi_accept_ctx(Gssctxt *, 96 gss_buffer_desc *, gss_buffer_desc *, OM_uint32 *); 97 OM_uint32 ssh_gssapi_getclient(Gssctxt *, ssh_gssapi_client *); 98 void ssh_gssapi_error(Gssctxt *); 99 char *ssh_gssapi_last_error(Gssctxt *, OM_uint32 *, OM_uint32 *); 100 void ssh_gssapi_build_ctx(Gssctxt **); 101 void ssh_gssapi_delete_ctx(Gssctxt **); 102 OM_uint32 ssh_gssapi_sign(Gssctxt *, gss_buffer_t, gss_buffer_t); 103 void ssh_gssapi_buildmic(struct sshbuf *, const char *, 104 const char *, const char *, const struct sshbuf *); 105 int ssh_gssapi_check_mechanism(Gssctxt **, gss_OID, const char *); 106 107 /* In the server */ 108 OM_uint32 ssh_gssapi_server_ctx(Gssctxt **, gss_OID); 109 int ssh_gssapi_userok(char *name); 110 OM_uint32 ssh_gssapi_checkmic(Gssctxt *, gss_buffer_t, gss_buffer_t); 111 void ssh_gssapi_do_child(char ***, u_int *); 112 void ssh_gssapi_cleanup_creds(void); 113 void ssh_gssapi_storecreds(void); 114 const char *ssh_gssapi_displayname(void); 115 116 #endif /* GSSAPI */ 117 118 #endif /* _SSH_GSS_H */ 119