view agentfwd.h @ 1630:9579377b5f8b

use strlcpy & strlcat (#74) * refactor checkpubkeyperms() with safe BSD functions fix gcc8 warnings ``` svr-authpubkey.c: In function 'checkpubkeyperms': svr-authpubkey.c:427:2: warning: 'strncat' specified bound 5 equals source length [-Wstringop-overflow=] strncat(filename, "/.ssh", 5); /* strlen("/.ssh") == 5 */ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ svr-authpubkey.c:433:2: warning: 'strncat' specified bound 16 equals source length [-Wstringop-overflow=] strncat(filename, "/authorized_keys", 16); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ``` see https://www.sudo.ws/todd/papers/strlcpy.html * restore strlcpy in xstrdup see original https://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/xmalloc.c?rev=1.16
author François Perrad <francois.perrad@gadz.org>
date Wed, 20 Mar 2019 15:09:19 +0100
parents 06d52bcb8094
children a53e7d2d60be
line wrap: on
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/*
 * Dropbear - a SSH2 server
 * 
 * Copyright (c) 2002,2003 Matt Johnston
 * All rights reserved.
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE. */
#ifndef DROPBEAR_AGENTFWD_H_
#define DROPBEAR_AGENTFWD_H_

#include "includes.h"
#include "chansession.h"
#include "channel.h"
#include "auth.h"
#include "list.h"

#if DROPBEAR_CLI_AGENTFWD

/* An agent reply can be reasonably large, as it can
 * contain a list of all public keys held by the agent.
 * 10000 is arbitrary */
#define MAX_AGENT_REPLY  10000

/* client functions */
void cli_load_agent_keys(m_list * ret_list);
void agent_buf_sign(buffer *sigblob, sign_key *key, 
	const buffer *data_buf);
void cli_setup_agent(const struct Channel *channel);

#ifdef __hpux
#define seteuid(a)       setresuid(-1, (a), -1)
#define setegid(a)       setresgid(-1, (a), -1)
#endif

extern const struct ChanType cli_chan_agent;

#endif /* DROPBEAR_CLI_AGENTFWD */

#if DROPBEAR_SVR_AGENTFWD

int svr_agentreq(struct ChanSess * chansess);
void svr_agentcleanup(struct ChanSess * chansess);
void svr_agentset(const struct ChanSess *chansess);

#endif /* DROPBEAR_SVR_AGENTFWD */

#endif /* DROPBEAR_AGENTFWD_H_ */