teraterm/teraterm/scp.cpp

/*
 * (C) 2022- TeraTerm Project
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/*
 *      ttxssh.dll �����C���^�[�t�F�C�X
 *      - ttssh2/ttxssh/ttxssh.def �Q��
 *
 *      TODO
 *      - unicode(wchar_t) filename
 *      - init()/uninit() per ssh connect/disconnect
 */

#define _CRTDBG_MAP_ALLOC
#include <stdlib.h>
#include <crtdbg.h>
#include <windows.h>

#include "scp.h"

typedef int (CALLBACK *PSSH_start_scp)(char *, char *);
typedef int (CALLBACK * PSSH_scp_sending_status)(void);
typedef size_t (CALLBACK *PSSH_GetKnownHostsFileName)(wchar_t *, size_t);

static HMODULE h = NULL;
static PSSH_start_scp start_scp = NULL;
static PSSH_start_scp receive_file = NULL;
static PSSH_scp_sending_status scp_sending_status = NULL;
static PSSH_GetKnownHostsFileName GetKnownHostsFileName;

/**
 * @brief SCP�������A�h���X������
 * @retval TRUE ok
 * @retval FALSE dll������/dll��scp���M����������������
 */
static BOOL ScpInit(void)
{
        if (h == NULL) {
                if ((h = GetModuleHandle("ttxssh.dll")) == NULL) {
                        return FALSE;
                }
        }

        if (start_scp == NULL) {
                start_scp = (PSSH_start_scp)GetProcAddress(h, "TTXScpSendfile");
                if (start_scp == NULL) {
                        return FALSE;
                }
        }
        if (scp_sending_status == NULL) {
                scp_sending_status = (PSSH_scp_sending_status)GetProcAddress(h, "TTXScpSendingStatus");
                if (scp_sending_status == NULL) {
                        return FALSE;
                }
        }

        if (receive_file == NULL) {
                receive_file = (PSSH_start_scp)GetProcAddress(h, "TTXScpReceivefile");
                if (receive_file == NULL) {
                        return FALSE;
                }
        }

        if (GetKnownHostsFileName == NULL) {
                GetKnownHostsFileName = (PSSH_GetKnownHostsFileName)GetProcAddress(h, "TTXReadKnownHostsFile");
                if (GetKnownHostsFileName == NULL) {
                        return FALSE;
                }
        }

        return TRUE;
}

/**
 *      �t�@�C�������M����
 */
BOOL ScpSend(const char *local, const char *remote)
{
        if (start_scp == NULL) {
                ScpInit();
        }
        if (start_scp == NULL) {
                return FALSE;
        }
        BOOL r = (BOOL)start_scp((char*)local, (char*)remote);
        return r;
}

/**
 *      �t�@�C�����M����
 *      @retval FALSE   ���M����������
 *      @retval TRUE    ���M��
 */
BOOL ScpGetStatus(void)
{
        if (scp_sending_status == NULL) {
                ScpInit();
        }
        if (scp_sending_status == NULL) {
                return FALSE;
        }
        BOOL r = (BOOL)scp_sending_status();
        return r;
}

/**
 *      �t�@�C�������M����
 */
BOOL ScpReceive(const char *remotefile, const char *localfile)
{
        if (receive_file == NULL) {
                ScpInit();
        }
        if (receive_file == NULL) {
                return FALSE;
        }
        BOOL r = (BOOL)receive_file((char*)remotefile, (char*)localfile);
        return r;
}

/**
 *      knownhost�t�@�C����������
 *      �s�v����������free()��������
 */
BOOL TTXSSHGetKnownHostsFileName(wchar_t **filename)
{
        if (GetKnownHostsFileName == NULL) {
                ScpInit();
        }
        if (GetKnownHostsFileName == NULL) {
                *filename = NULL;
                return FALSE;
        }

        size_t size = GetKnownHostsFileName(NULL, 0);
        if (size == 0) {
                *filename = NULL;
                return FALSE;
        }
        wchar_t *f = (wchar_t *)malloc(sizeof(wchar_t) * size);
        if (f == NULL) {
                *filename = NULL;
                return FALSE;
        }
        GetKnownHostsFileName(f, size);

        *filename = f;
        return TRUE;
}