399 lines
11 KiB
C
399 lines
11 KiB
C
/* scpclient.c
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*
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* Copyright (C) 2014-2020 wolfSSL Inc.
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*
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* This file is part of wolfSSH.
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*
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* wolfSSH is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* wolfSSH is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with wolfSSH. If not, see <http://www.gnu.org/licenses/>.
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*/
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#define WOLFSSH_TEST_CLIENT
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#include <stdio.h>
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#if !defined(USE_WINDOWS_API) && !defined(MICROCHIP_PIC32)
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#include <termios.h>
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#endif
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#include <wolfssh/ssh.h>
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#include <wolfssh/wolfscp.h>
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#include <wolfssh/test.h>
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#include <wolfssh/port.h>
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#if defined(HAVE_ECC) && defined(FP_ECC) && defined(HAVE_THREAD_LS)
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#include <wolfssl/wolfcrypt/ecc.h>
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#endif
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#include "examples/scpclient/scpclient.h"
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/* type = 2 : shell / execute command settings
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* type = 0 : password
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* type = 1 : restore default
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* return 0 on success */
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static int SetEcho(int type)
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{
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#if !defined(USE_WINDOWS_API) && !defined(MICROCHIP_PIC32)
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static int echoInit = 0;
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static struct termios originalTerm;
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if (!echoInit) {
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if (tcgetattr(STDIN_FILENO, &originalTerm) != 0) {
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printf("Couldn't get the original terminal settings.\n");
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return -1;
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}
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echoInit = 1;
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}
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if (type == 1) {
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if (tcsetattr(STDIN_FILENO, TCSANOW, &originalTerm) != 0) {
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printf("Couldn't restore the terminal settings.\n");
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return -1;
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}
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}
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else {
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struct termios newTerm;
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memcpy(&newTerm, &originalTerm, sizeof(struct termios));
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newTerm.c_lflag &= ~ECHO;
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if (type == 2) {
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newTerm.c_lflag &= ~(ICANON | ECHOE | ECHOK | ECHONL | ISIG);
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}
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else {
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newTerm.c_lflag |= (ICANON | ECHONL);
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}
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if (tcsetattr(STDIN_FILENO, TCSANOW, &newTerm) != 0) {
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printf("Couldn't turn off echo.\n");
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return -1;
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}
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}
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#else
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static int echoInit = 0;
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static DWORD originalTerm;
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static CONSOLE_SCREEN_BUFFER_INFO screenOrig;
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HANDLE stdinHandle = GetStdHandle(STD_INPUT_HANDLE);
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if (!echoInit) {
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if (GetConsoleMode(stdinHandle, &originalTerm) == 0) {
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printf("Couldn't get the original terminal settings.\n");
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return -1;
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}
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echoInit = 1;
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}
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if (type == 1) {
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if (SetConsoleMode(stdinHandle, originalTerm) == 0) {
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printf("Couldn't restore the terminal settings.\n");
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return -1;
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}
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}
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else if (type == 2) {
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DWORD newTerm = originalTerm;
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newTerm &= ~ENABLE_PROCESSED_INPUT;
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newTerm &= ~ENABLE_PROCESSED_OUTPUT;
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newTerm &= ~ENABLE_LINE_INPUT;
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newTerm &= ~ENABLE_ECHO_INPUT;
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newTerm &= ~(ENABLE_EXTENDED_FLAGS | ENABLE_INSERT_MODE);
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if (SetConsoleMode(stdinHandle, newTerm) == 0) {
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printf("Couldn't turn off echo.\n");
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return -1;
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}
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}
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else {
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DWORD newTerm = originalTerm;
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newTerm &= ~ENABLE_ECHO_INPUT;
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if (SetConsoleMode(stdinHandle, newTerm) == 0) {
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printf("Couldn't turn off echo.\n");
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return -1;
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}
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}
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#endif
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return 0;
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}
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byte userPassword[256];
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static int wsUserAuth(byte authType,
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WS_UserAuthData* authData,
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void* ctx)
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{
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const char* defaultPassword = (const char*)ctx;
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word32 passwordSz = 0;
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int ret = WOLFSSH_USERAUTH_SUCCESS;
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if (authType == WOLFSSH_USERAUTH_PASSWORD) {
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if (defaultPassword != NULL) {
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passwordSz = (word32)strlen(defaultPassword);
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memcpy(userPassword, defaultPassword, passwordSz);
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}
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else {
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printf("Password: ");
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fflush(stdout);
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SetEcho(0);
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if (fgets((char*)userPassword, sizeof(userPassword), stdin) == NULL) {
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printf("Getting password failed.\n");
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ret = WOLFSSH_USERAUTH_FAILURE;
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}
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else {
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char* c = strpbrk((char*)userPassword, "\r\n");
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if (c != NULL)
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*c = '\0';
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}
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passwordSz = (word32)strlen((const char*)userPassword);
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SetEcho(1);
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#ifdef USE_WINDOWS_API
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printf("\r\n");
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#endif
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fflush(stdout);
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}
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if (ret == WOLFSSH_USERAUTH_SUCCESS) {
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authData->sf.password.password = userPassword;
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authData->sf.password.passwordSz = passwordSz;
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}
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}
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else if (authType == WOLFSSH_USERAUTH_PUBLICKEY) {
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ret = WOLFSSH_USERAUTH_INVALID_AUTHTYPE;
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}
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return ret;
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}
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static int wsPublicKeyCheck(const byte* pubKey, word32 pubKeySz, void* ctx)
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{
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#ifdef DEBUG_WOLFSSH
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printf("Sample public key check callback\n"
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" public key = %p\n"
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" public key size = %u\n"
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" ctx = %s\n", pubKey, pubKeySz, (const char*)ctx);
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#else
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(void)pubKey;
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(void)pubKeySz;
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(void)ctx;
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#endif
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return 0;
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}
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#define USAGE_WIDE "12"
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static void ShowUsage(void)
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{
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printf("wolfscp %s\n", LIBWOLFSSH_VERSION_STRING);
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printf(" -%c %-" USAGE_WIDE "s %s\n", 'h', "",
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"display this help and exit");
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printf(" -%c %-" USAGE_WIDE "s %s, default %s\n", 'H', "<host>",
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"host to connect to", wolfSshIp);
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printf(" -%c %-" USAGE_WIDE "s %s, default %u\n", 'p', "<num>",
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"port to connect on", wolfSshPort);
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printf(" -%c %-" USAGE_WIDE "s %s\n", 'u', "<username>",
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"username to authenticate as (REQUIRED)");
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printf(" -%c %-" USAGE_WIDE "s %s\n", 'P', "<password>",
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"password for username, prompted if omitted");
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printf(" -%c %-" USAGE_WIDE "s %s\n", 'L', "<from>:<to>",
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"copy from local to server");
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printf(" -%c %-" USAGE_WIDE "s %s\n", 'S', "<from>:<to>",
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"copy from server to local");
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}
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enum copyDir {copyNone, copyToSrv, copyFromSrv};
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THREAD_RETURN WOLFSSH_THREAD scp_client(void* args)
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{
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WOLFSSH_CTX* ctx = NULL;
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WOLFSSH* ssh = NULL;
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SOCKET_T sockFd = WOLFSSH_SOCKET_INVALID;
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SOCKADDR_IN_T clientAddr;
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socklen_t clientAddrSz = sizeof(clientAddr);
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int argc = ((func_args*)args)->argc;
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int ret = 0;
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char** argv = ((func_args*)args)->argv;
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const char* username = NULL;
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const char* password = NULL;
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char* host = (char*)wolfSshIp;
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char* path1 = NULL;
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char* path2 = NULL;
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word16 port = wolfSshPort;
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byte nonBlock = 0;
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enum copyDir dir = copyNone;
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char ch;
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((func_args*)args)->return_code = 0;
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while ((ch = mygetopt(argc, argv, "H:L:NP:S:hp:u:")) != -1) {
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switch (ch) {
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case 'H':
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host = myoptarg;
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break;
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case 'L':
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dir = copyToSrv;
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path1 = myoptarg;
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break;
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case 'N':
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nonBlock = 1;
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break;
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case 'P':
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password = myoptarg;
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break;
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case 'S':
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dir = copyFromSrv;
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path1 = myoptarg;
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break;
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case 'h':
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ShowUsage();
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exit(EXIT_SUCCESS);
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case 'u':
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username = myoptarg;
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break;
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case 'p':
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port = (word16)atoi(myoptarg);
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#if !defined(NO_MAIN_DRIVER) || defined(USE_WINDOWS_API)
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if (port == 0)
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err_sys("port number cannot be 0");
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#endif
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break;
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default:
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ShowUsage();
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exit(MY_EX_USAGE);
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break;
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}
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}
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myoptind = 0; /* reset for test cases */
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if (username == NULL)
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err_sys("client requires a username parameter.");
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if (dir == copyNone)
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err_sys("didn't specify a copy direction");
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/* split file path */
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if (path1 == NULL) {
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err_sys("Missing path value");
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}
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path2 = strchr(path1, ':');
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if (path2 == NULL) {
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err_sys("Missing colon separator");
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}
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*path2 = 0;
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path2++;
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if (strlen(path1) == 0 || strlen(path2) == 0) {
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err_sys("Empty path values");
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}
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ctx = wolfSSH_CTX_new(WOLFSSH_ENDPOINT_CLIENT, NULL);
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if (ctx == NULL)
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err_sys("Couldn't create wolfSSH client context.");
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if (((func_args*)args)->user_auth == NULL)
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wolfSSH_SetUserAuth(ctx, wsUserAuth);
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else
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wolfSSH_SetUserAuth(ctx, ((func_args*)args)->user_auth);
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ssh = wolfSSH_new(ctx);
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if (ssh == NULL)
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err_sys("Couldn't create wolfSSH session.");
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if (password != NULL)
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wolfSSH_SetUserAuthCtx(ssh, (void*)password);
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wolfSSH_CTX_SetPublicKeyCheck(ctx, wsPublicKeyCheck);
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wolfSSH_SetPublicKeyCheckCtx(ssh, (void*)"You've been sampled!");
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ret = wolfSSH_SetUsername(ssh, username);
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if (ret != WS_SUCCESS)
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err_sys("Couldn't set the username.");
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build_addr(&clientAddr, host, port);
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tcp_socket(&sockFd);
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ret = connect(sockFd, (const struct sockaddr *)&clientAddr, clientAddrSz);
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if (ret != 0)
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err_sys("Couldn't connect to server.");
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if (nonBlock)
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tcp_set_nonblocking(&sockFd);
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ret = wolfSSH_set_fd(ssh, (int)sockFd);
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if (ret != WS_SUCCESS)
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err_sys("Couldn't set the session's socket.");
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if (ret != WS_SUCCESS)
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err_sys("Couldn't set the channel type.");
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if (dir == copyFromSrv)
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ret = wolfSSH_SCP_from(ssh, path1, path2);
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else if (dir == copyToSrv)
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ret = wolfSSH_SCP_to(ssh, path1, path2);
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if (ret != WS_SUCCESS)
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err_sys("Couldn't copy the file.");
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ret = wolfSSH_shutdown(ssh);
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WCLOSESOCKET(sockFd);
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wolfSSH_free(ssh);
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wolfSSH_CTX_free(ctx);
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if (ret != WS_SUCCESS)
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err_sys("Closing scp stream failed. Connection could have been closed by peer");
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#if defined(HAVE_ECC) && defined(FP_ECC) && defined(HAVE_THREAD_LS)
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wc_ecc_fp_free(); /* free per thread cache */
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#endif
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return 0;
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}
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#ifndef NO_MAIN_DRIVER
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int main(int argc, char* argv[])
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{
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func_args args;
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args.argc = argc;
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args.argv = argv;
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args.return_code = 0;
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args.user_auth = NULL;
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#ifdef DEBUG_WOLFSSH
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wolfSSH_Debugging_ON();
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#endif
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wolfSSH_Init();
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scp_client(&args);
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wolfSSH_Cleanup();
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return args.return_code;
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}
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int myoptind = 0;
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char* myoptarg = NULL;
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#endif /* NO_MAIN_DRIVER */
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