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gssapi.h
/*
* This file is part of the SSH Library
*
* Copyright (c) 2013 by Aris Adamantiadis
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef GSSAPI_H_
#define GSSAPI_H_
#include "config.h"
#ifdef WITH_GSSAPI
#include "session.h"
#include <gssapi/gssapi.h>
/* all OID begin with the tag identifier + length */
#define SSH_OID_TAG 06
#define GSSAPI_KEY_EXCHANGE_SUPPORTED "gss-group14-sha256-," \
"gss-group16-sha512-," \
"gss-nistp256-sha256-," \
"gss-curve25519-sha256-"
typedef struct ssh_gssapi_struct *ssh_gssapi;
#ifdef __cplusplus
extern "C" {
#endif
enum ssh_gssapi_state_e {
SSH_GSSAPI_STATE_NONE, /* no status */
SSH_GSSAPI_STATE_RCV_TOKEN, /* Expecting a token */
SSH_GSSAPI_STATE_RCV_MIC, /* Expecting a MIC */
};
struct ssh_gssapi_struct{
enum ssh_gssapi_state_e state; /* current state */
gss_cred_id_t server_creds; /* credentials of server */
gss_cred_id_t client_creds; /* creds delegated by the client */
gss_ctx_id_t ctx; /* the authentication context */
gss_name_t client_name; /* Identity of the client */
char *user; /* username of client */
char *canonic_user; /* canonic form of the client's username */
struct {
gss_name_t server_name; /* identity of server */
OM_uint32 flags; /* flags used for init context */
gss_OID oid; /* mech being used for authentication */
gss_cred_id_t creds; /* creds used to initialize context */
gss_cred_id_t client_deleg_creds; /* delegated creds (const, not freeable) */
} client;
};
#ifdef WITH_SERVER
int ssh_gssapi_handle_userauth(ssh_session session, const char *user, uint32_t n_oid, ssh_string *oids);
SSH_PACKET_CALLBACK(ssh_packet_userauth_gssapi_token_server);
SSH_PACKET_CALLBACK(ssh_packet_userauth_gssapi_mic);
int ssh_gssapi_server_oids(gss_OID_set *selected);
#endif /* WITH_SERVER */
SSH_PACKET_CALLBACK(ssh_packet_userauth_gssapi_token);
SSH_PACKET_CALLBACK(ssh_packet_userauth_gssapi_token_client);
SSH_PACKET_CALLBACK(ssh_packet_userauth_gssapi_response);
int ssh_gssapi_init(ssh_session session);
void ssh_gssapi_log_error(int verb, const char *msg_a, int maj_stat, int min_stat);
int ssh_gssapi_auth_mic(ssh_session session);
void ssh_gssapi_free(ssh_session session);
int ssh_gssapi_client_identity(ssh_session session, gss_OID_set *valid_oids);
char *ssh_gssapi_name_to_char(gss_name_t name);
int ssh_gssapi_import_name(struct ssh_gssapi_struct *gssapi, const char *host);
OM_uint32 ssh_gssapi_init_ctx(struct ssh_gssapi_struct *gssapi,
gss_buffer_desc *input_token,
gss_buffer_desc *output_token,
OM_uint32 *ret_flags);
char *ssh_gssapi_oid_hash(ssh_string oid);
char *ssh_gssapi_kex_mechs(ssh_session session);
int ssh_gssapi_check_client_config(ssh_session session);
ssh_buffer ssh_gssapi_build_mic(ssh_session session, const char *context);
int ssh_gssapi_auth_keyex_mic(ssh_session session,
gss_buffer_desc *mic_token_buf);
#ifdef __cplusplus
}
#endif
#endif /* WITH_GSSAPI */
#endif /* GSSAPI_H */
SSH_PACKET_CALLBACK
#define SSH_PACKET_CALLBACK(name)
This macro declares a packet callback handler.
Definition callbacks.h:625