19261079b7
Some notable changes, from upstream's release notes: - sshd(8): Remove support for obsolete "host/port" syntax. - ssh(1): When prompting whether to record a new host key, accept the key fingerprint as a synonym for "yes". - ssh-keygen(1): when acting as a CA and signing certificates with an RSA key, default to using the rsa-sha2-512 signature algorithm. - ssh(1), sshd(8), ssh-keygen(1): this release removes the "ssh-rsa" (RSA/SHA1) algorithm from those accepted for certificate signatures. - ssh-sk-helper(8): this is a new binary. It is used by the FIDO/U2F support to provide address-space isolation for token middleware libraries (including the internal one). - ssh(1): this release enables UpdateHostkeys by default subject to some conservative preconditions. - scp(1): this release changes the behaviour of remote to remote copies (e.g. "scp host-a:/path host-b:") to transfer through the local host by default. - scp(1): experimental support for transfers using the SFTP protocol as a replacement for the venerable SCP/RCP protocol that it has traditionally used. Additional integration work is needed to support FIDO/U2F in the base system. Deprecation Notice ------------------ OpenSSH will disable the ssh-rsa signature scheme by default in the next release. Reviewed by: imp MFC after: 1 month Relnotes: Yes Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D29985
141 lines
4.7 KiB
C
141 lines
4.7 KiB
C
/* $OpenBSD: ssh-gss.h,v 1.15 2021/01/27 10:05:28 djm Exp $ */
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/* $FreeBSD$ */
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/*
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* Copyright (c) 2001-2003 Simon Wilkinson. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR `AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _SSH_GSS_H
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#define _SSH_GSS_H
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#ifdef GSSAPI
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#ifdef HAVE_GSSAPI_GSSAPI_H
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#include <gssapi/gssapi.h>
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#elif defined(HAVE_GSSAPI_H)
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#include <gssapi.h>
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#endif
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#ifdef KRB5
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# ifndef HEIMDAL
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# ifdef HAVE_GSSAPI_GENERIC_H
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# include <gssapi_generic.h>
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# elif defined(HAVE_GSSAPI_GSSAPI_GENERIC_H)
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# include <gssapi/gssapi_generic.h>
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# endif
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/* Old MIT Kerberos doesn't seem to define GSS_NT_HOSTBASED_SERVICE */
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# if !HAVE_DECL_GSS_C_NT_HOSTBASED_SERVICE
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# define GSS_C_NT_HOSTBASED_SERVICE gss_nt_service_name
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# endif /* !HAVE_DECL_GSS_C_NT_... */
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# endif /* !HEIMDAL */
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#endif /* KRB5 */
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/* draft-ietf-secsh-gsskeyex-06 */
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#define SSH2_MSG_USERAUTH_GSSAPI_RESPONSE 60
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#define SSH2_MSG_USERAUTH_GSSAPI_TOKEN 61
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#define SSH2_MSG_USERAUTH_GSSAPI_EXCHANGE_COMPLETE 63
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#define SSH2_MSG_USERAUTH_GSSAPI_ERROR 64
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#define SSH2_MSG_USERAUTH_GSSAPI_ERRTOK 65
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#define SSH2_MSG_USERAUTH_GSSAPI_MIC 66
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#define SSH_GSS_OIDTYPE 0x06
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typedef struct {
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char *filename;
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char *envvar;
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char *envval;
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void *data;
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} ssh_gssapi_ccache;
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typedef struct {
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gss_buffer_desc displayname;
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gss_buffer_desc exportedname;
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gss_cred_id_t creds;
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struct ssh_gssapi_mech_struct *mech;
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ssh_gssapi_ccache store;
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} ssh_gssapi_client;
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typedef struct ssh_gssapi_mech_struct {
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char *enc_name;
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char *name;
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gss_OID_desc oid;
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int (*dochild) (ssh_gssapi_client *);
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int (*userok) (ssh_gssapi_client *, char *);
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int (*localname) (ssh_gssapi_client *, char **);
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void (*storecreds) (ssh_gssapi_client *);
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} ssh_gssapi_mech;
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typedef struct {
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OM_uint32 major; /* both */
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OM_uint32 minor; /* both */
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gss_ctx_id_t context; /* both */
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gss_name_t name; /* both */
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gss_OID oid; /* client */
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gss_cred_id_t creds; /* server */
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gss_name_t client; /* server */
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gss_cred_id_t client_creds; /* server */
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} Gssctxt;
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extern ssh_gssapi_mech *supported_mechs[];
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int ssh_gssapi_check_oid(Gssctxt *, void *, size_t);
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void ssh_gssapi_set_oid_data(Gssctxt *, void *, size_t);
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void ssh_gssapi_set_oid(Gssctxt *, gss_OID);
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void ssh_gssapi_supported_oids(gss_OID_set *);
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ssh_gssapi_mech *ssh_gssapi_get_ctype(Gssctxt *);
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void ssh_gssapi_prepare_supported_oids(void);
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OM_uint32 ssh_gssapi_test_oid_supported(OM_uint32 *, gss_OID, int *);
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struct sshbuf;
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int ssh_gssapi_get_buffer_desc(struct sshbuf *, gss_buffer_desc *);
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OM_uint32 ssh_gssapi_import_name(Gssctxt *, const char *);
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OM_uint32 ssh_gssapi_init_ctx(Gssctxt *, int,
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gss_buffer_desc *, gss_buffer_desc *, OM_uint32 *);
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OM_uint32 ssh_gssapi_accept_ctx(Gssctxt *,
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gss_buffer_desc *, gss_buffer_desc *, OM_uint32 *);
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OM_uint32 ssh_gssapi_getclient(Gssctxt *, ssh_gssapi_client *);
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void ssh_gssapi_error(Gssctxt *);
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char *ssh_gssapi_last_error(Gssctxt *, OM_uint32 *, OM_uint32 *);
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void ssh_gssapi_build_ctx(Gssctxt **);
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void ssh_gssapi_delete_ctx(Gssctxt **);
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OM_uint32 ssh_gssapi_sign(Gssctxt *, gss_buffer_t, gss_buffer_t);
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void ssh_gssapi_buildmic(struct sshbuf *, const char *,
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const char *, const char *, const struct sshbuf *);
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int ssh_gssapi_check_mechanism(Gssctxt **, gss_OID, const char *);
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/* In the server */
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OM_uint32 ssh_gssapi_server_ctx(Gssctxt **, gss_OID);
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int ssh_gssapi_userok(char *name);
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OM_uint32 ssh_gssapi_checkmic(Gssctxt *, gss_buffer_t, gss_buffer_t);
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void ssh_gssapi_do_child(char ***, u_int *);
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void ssh_gssapi_cleanup_creds(void);
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void ssh_gssapi_storecreds(void);
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const char *ssh_gssapi_displayname(void);
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#endif /* GSSAPI */
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#endif /* _SSH_GSS_H */
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