311 lines
8.8 KiB
C
311 lines
8.8 KiB
C
|
/* Copyright (C) The libssh2 project and its contributors.
|
||
|
|
*
|
||
|
|
* Sample doing an SFTP directory listing.
|
||
|
|
*
|
||
|
|
* The sample code has default values for host name, user name, password and
|
||
|
|
* path, but you can specify them on the command line like:
|
||
|
|
*
|
||
|
|
* $ ./sftpdir 192.168.0.1 user password /tmp/secretdir
|
||
|
|
*
|
||
|
|
* SPDX-License-Identifier: BSD-3-Clause
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "libssh2_setup.h"
|
||
|
|
#include <libssh2.h>
|
||
|
|
#include <libssh2_sftp.h>
|
||
|
|
|
||
|
|
#ifdef HAVE_SYS_SOCKET_H
|
||
|
|
#include <sys/socket.h>
|
||
|
|
#endif
|
||
|
|
#ifdef HAVE_UNISTD_H
|
||
|
|
#include <unistd.h>
|
||
|
|
#endif
|
||
|
|
#ifdef HAVE_NETINET_IN_H
|
||
|
|
#include <netinet/in.h>
|
||
|
|
#endif
|
||
|
|
#ifdef HAVE_ARPA_INET_H
|
||
|
|
#include <arpa/inet.h>
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#include <stdio.h>
|
||
|
|
#include <string.h>
|
||
|
|
|
||
|
|
#if defined(_MSC_VER)
|
||
|
|
#define LIBSSH2_FILESIZE_MASK "I64u"
|
||
|
|
#else
|
||
|
|
#define LIBSSH2_FILESIZE_MASK "llu"
|
||
|
|
#endif
|
||
|
|
|
||
|
|
static const char *pubkey = "/home/username/.ssh/id_rsa.pub";
|
||
|
|
static const char *privkey = "/home/username/.ssh/id_rsa";
|
||
|
|
static const char *username = "username";
|
||
|
|
static const char *password = "password";
|
||
|
|
static const char *sftppath = "/tmp/secretdir";
|
||
|
|
|
||
|
|
static void kbd_callback(const char *name, int name_len,
|
||
|
|
const char *instruction, int instruction_len,
|
||
|
|
int num_prompts,
|
||
|
|
const LIBSSH2_USERAUTH_KBDINT_PROMPT *prompts,
|
||
|
|
LIBSSH2_USERAUTH_KBDINT_RESPONSE *responses,
|
||
|
|
void **abstract)
|
||
|
|
{
|
||
|
|
(void)name;
|
||
|
|
(void)name_len;
|
||
|
|
(void)instruction;
|
||
|
|
(void)instruction_len;
|
||
|
|
if(num_prompts == 1) {
|
||
|
|
responses[0].text = strdup(password);
|
||
|
|
responses[0].length = (unsigned int)strlen(password);
|
||
|
|
}
|
||
|
|
(void)prompts;
|
||
|
|
(void)abstract;
|
||
|
|
} /* kbd_callback */
|
||
|
|
|
||
|
|
int main(int argc, char *argv[])
|
||
|
|
{
|
||
|
|
uint32_t hostaddr;
|
||
|
|
libssh2_socket_t sock;
|
||
|
|
int i, auth_pw = 0;
|
||
|
|
struct sockaddr_in sin;
|
||
|
|
const char *fingerprint;
|
||
|
|
char *userauthlist;
|
||
|
|
int rc;
|
||
|
|
LIBSSH2_SESSION *session = NULL;
|
||
|
|
LIBSSH2_SFTP *sftp_session;
|
||
|
|
LIBSSH2_SFTP_HANDLE *sftp_handle;
|
||
|
|
|
||
|
|
#ifdef _WIN32
|
||
|
|
WSADATA wsadata;
|
||
|
|
|
||
|
|
rc = WSAStartup(MAKEWORD(2, 0), &wsadata);
|
||
|
|
if(rc) {
|
||
|
|
fprintf(stderr, "WSAStartup failed with error: %d\n", rc);
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
if(argc > 1) {
|
||
|
|
hostaddr = inet_addr(argv[1]);
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
hostaddr = htonl(0x7F000001);
|
||
|
|
}
|
||
|
|
if(argc > 2) {
|
||
|
|
username = argv[2];
|
||
|
|
}
|
||
|
|
if(argc > 3) {
|
||
|
|
password = argv[3];
|
||
|
|
}
|
||
|
|
if(argc > 4) {
|
||
|
|
sftppath = argv[4];
|
||
|
|
}
|
||
|
|
|
||
|
|
rc = libssh2_init(0);
|
||
|
|
if(rc) {
|
||
|
|
fprintf(stderr, "libssh2 initialization failed (%d)\n", rc);
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* The application code is responsible for creating the socket
|
||
|
|
* and establishing the connection
|
||
|
|
*/
|
||
|
|
sock = socket(AF_INET, SOCK_STREAM, 0);
|
||
|
|
if(sock == LIBSSH2_INVALID_SOCKET) {
|
||
|
|
fprintf(stderr, "failed to create socket.\n");
|
||
|
|
goto shutdown;
|
||
|
|
}
|
||
|
|
|
||
|
|
sin.sin_family = AF_INET;
|
||
|
|
sin.sin_port = htons(22);
|
||
|
|
sin.sin_addr.s_addr = hostaddr;
|
||
|
|
if(connect(sock, (struct sockaddr*)(&sin), sizeof(struct sockaddr_in))) {
|
||
|
|
fprintf(stderr, "failed to connect.\n");
|
||
|
|
goto shutdown;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Create a session instance */
|
||
|
|
session = libssh2_session_init();
|
||
|
|
if(!session) {
|
||
|
|
fprintf(stderr, "Could not initialize SSH session.\n");
|
||
|
|
goto shutdown;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* ... start it up. This will trade welcome banners, exchange keys,
|
||
|
|
* and setup crypto, compression, and MAC layers
|
||
|
|
*/
|
||
|
|
rc = libssh2_session_handshake(session, sock);
|
||
|
|
if(rc) {
|
||
|
|
fprintf(stderr, "Failure establishing SSH session: %d\n", rc);
|
||
|
|
goto shutdown;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* At this point we have not yet authenticated. The first thing to do
|
||
|
|
* is check the hostkey's fingerprint against our known hosts Your app
|
||
|
|
* may have it hard coded, may go to a file, may present it to the
|
||
|
|
* user, that's your call
|
||
|
|
*/
|
||
|
|
fingerprint = libssh2_hostkey_hash(session, LIBSSH2_HOSTKEY_HASH_SHA1);
|
||
|
|
fprintf(stderr, "Fingerprint: ");
|
||
|
|
for(i = 0; i < 20; i++) {
|
||
|
|
fprintf(stderr, "%02X ", (unsigned char)fingerprint[i]);
|
||
|
|
}
|
||
|
|
fprintf(stderr, "\n");
|
||
|
|
|
||
|
|
/* check what authentication methods are available */
|
||
|
|
userauthlist = libssh2_userauth_list(session, username,
|
||
|
|
(unsigned int)strlen(username));
|
||
|
|
if(userauthlist) {
|
||
|
|
fprintf(stderr, "Authentication methods: %s\n", userauthlist);
|
||
|
|
if(strstr(userauthlist, "password")) {
|
||
|
|
auth_pw |= 1;
|
||
|
|
}
|
||
|
|
if(strstr(userauthlist, "keyboard-interactive")) {
|
||
|
|
auth_pw |= 2;
|
||
|
|
}
|
||
|
|
if(strstr(userauthlist, "publickey")) {
|
||
|
|
auth_pw |= 4;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* check for options */
|
||
|
|
if(argc > 5) {
|
||
|
|
if((auth_pw & 1) && !strcmp(argv[5], "-p")) {
|
||
|
|
auth_pw = 1;
|
||
|
|
}
|
||
|
|
if((auth_pw & 2) && !strcmp(argv[5], "-i")) {
|
||
|
|
auth_pw = 2;
|
||
|
|
}
|
||
|
|
if((auth_pw & 4) && !strcmp(argv[5], "-k")) {
|
||
|
|
auth_pw = 4;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if(auth_pw & 1) {
|
||
|
|
/* We could authenticate via password */
|
||
|
|
if(libssh2_userauth_password(session, username, password)) {
|
||
|
|
fprintf(stderr, "Authentication by password failed.\n");
|
||
|
|
goto shutdown;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else if(auth_pw & 2) {
|
||
|
|
/* Or via keyboard-interactive */
|
||
|
|
if(libssh2_userauth_keyboard_interactive(session, username,
|
||
|
|
&kbd_callback) ) {
|
||
|
|
fprintf(stderr,
|
||
|
|
"Authentication by keyboard-interactive failed.\n");
|
||
|
|
goto shutdown;
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
fprintf(stderr,
|
||
|
|
"Authentication by keyboard-interactive succeeded.\n");
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else if(auth_pw & 4) {
|
||
|
|
/* Or by public key */
|
||
|
|
if(libssh2_userauth_publickey_fromfile(session, username,
|
||
|
|
pubkey, privkey,
|
||
|
|
password)) {
|
||
|
|
fprintf(stderr, "Authentication by public key failed.\n");
|
||
|
|
goto shutdown;
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
fprintf(stderr, "Authentication by public key succeeded.\n");
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
fprintf(stderr, "No supported authentication methods found.\n");
|
||
|
|
goto shutdown;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
fprintf(stderr, "libssh2_sftp_init().\n");
|
||
|
|
sftp_session = libssh2_sftp_init(session);
|
||
|
|
|
||
|
|
if(!sftp_session) {
|
||
|
|
fprintf(stderr, "Unable to init SFTP session\n");
|
||
|
|
goto shutdown;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Since we have not set non-blocking, tell libssh2 we are blocking */
|
||
|
|
libssh2_session_set_blocking(session, 1);
|
||
|
|
|
||
|
|
fprintf(stderr, "libssh2_sftp_opendir().\n");
|
||
|
|
/* Request a dir listing via SFTP */
|
||
|
|
sftp_handle = libssh2_sftp_opendir(sftp_session, sftppath);
|
||
|
|
if(!sftp_handle) {
|
||
|
|
fprintf(stderr, "Unable to open dir with SFTP\n");
|
||
|
|
goto shutdown;
|
||
|
|
}
|
||
|
|
|
||
|
|
fprintf(stderr, "libssh2_sftp_opendir() is done, now receive listing.\n");
|
||
|
|
do {
|
||
|
|
char mem[512];
|
||
|
|
char longentry[512];
|
||
|
|
LIBSSH2_SFTP_ATTRIBUTES attrs;
|
||
|
|
|
||
|
|
/* loop until we fail */
|
||
|
|
rc = libssh2_sftp_readdir_ex(sftp_handle, mem, sizeof(mem),
|
||
|
|
longentry, sizeof(longentry), &attrs);
|
||
|
|
if(rc > 0) {
|
||
|
|
/* rc is the length of the file name in the mem
|
||
|
|
buffer */
|
||
|
|
|
||
|
|
if(longentry[0] != '\0') {
|
||
|
|
printf("%s\n", longentry);
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
if(attrs.flags & LIBSSH2_SFTP_ATTR_PERMISSIONS) {
|
||
|
|
/* this should check what permissions it
|
||
|
|
is and print the output accordingly */
|
||
|
|
printf("--fix----- ");
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
printf("---------- ");
|
||
|
|
}
|
||
|
|
|
||
|
|
if(attrs.flags & LIBSSH2_SFTP_ATTR_UIDGID) {
|
||
|
|
printf("%4d %4d ", (int) attrs.uid, (int) attrs.gid);
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
printf(" - - ");
|
||
|
|
}
|
||
|
|
|
||
|
|
if(attrs.flags & LIBSSH2_SFTP_ATTR_SIZE) {
|
||
|
|
printf("%8" LIBSSH2_FILESIZE_MASK " ", attrs.filesize);
|
||
|
|
}
|
||
|
|
|
||
|
|
printf("%s\n", mem);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
} while(1);
|
||
|
|
|
||
|
|
libssh2_sftp_closedir(sftp_handle);
|
||
|
|
libssh2_sftp_shutdown(sftp_session);
|
||
|
|
|
||
|
|
shutdown:
|
||
|
|
|
||
|
|
if(session) {
|
||
|
|
libssh2_session_disconnect(session, "Normal Shutdown");
|
||
|
|
libssh2_session_free(session);
|
||
|
|
}
|
||
|
|
|
||
|
|
if(sock != LIBSSH2_INVALID_SOCKET) {
|
||
|
|
shutdown(sock, 2);
|
||
|
|
LIBSSH2_SOCKET_CLOSE(sock);
|
||
|
|
}
|
||
|
|
|
||
|
|
fprintf(stderr, "all done\n");
|
||
|
|
|
||
|
|
libssh2_exit();
|
||
|
|
|
||
|
|
#ifdef _WIN32
|
||
|
|
WSACleanup();
|
||
|
|
#endif
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|