#include "libssh2_setup.h"

#include <libssh2.h>

#include <libssh2_sftp.h>

#ifdef HAVE_SYS_SOCKET_H

#include <sys/socket.h>

#ifdef HAVE_UNISTD_H

#include <unistd.h>

#ifdef HAVE_NETINET_IN_H

#include <netinet/in.h>

#ifdef HAVE_ARPA_INET_H

#include <arpa/inet.h>

#include <stdio.h>

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 *loclfile = "sftp_write.c";

static const char *sftppath = "/tmp/TEST";

int main(int argc, char *argv[])

{

uint32_t hostaddr;

libssh2_socket_t sock;

int i, auth_pw = 1;

struct sockaddr_in sin;

const char *fingerprint;

int rc;

LIBSSH2_SESSION *session = NULL;

LIBSSH2_SFTP *sftp_session;

LIBSSH2_SFTP_HANDLE *sftp_handle;

LIBSSH2_SFTP_ATTRIBUTES attrs;

char mem[1024 * 100];

FILE *local;

size_t nread;

ssize_t nwritten;

char *ptr;

#ifdef _WIN32

WSADATA wsadata;

rc = WSAStartup(MAKEWORD(2, 0), &wsadata);

if(rc) {

fprintf(stderr, "WSAStartup failed with error: %d\n", rc);

return 1;

}

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) {

loclfile = argv[4];

}

if(argc > 5) {

sftppath = argv[5];

}

rc = libssh2_init(0);

if(rc) {

fprintf(stderr, "libssh2 initialization failed (%d)\n", rc);

return 1;

}

local = fopen(loclfile, "rb");

if(!local) {

fprintf(stderr, "Cannot open local file %s\n", loclfile);

return 1;

}

/*

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;

}

/* Since we have set non-blocking, tell libssh2 we are blocking */

libssh2_session_set_blocking(session, 1);

/* ... start it up. This will trade welcome banners, exchange keys,

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

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");

if(auth_pw) {

/* We could authenticate via password */

if(libssh2_userauth_password(session, username, password)) {

fprintf(stderr, "Authentication by password failed.\n");

goto shutdown;

}

}

else {

/* Or by public key */

if(libssh2_userauth_publickey_fromfile(session, username,

pubkey, privkey,

password)) {

fprintf(stderr, "Authentication by public key failed.\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;

}

fprintf(stderr, "libssh2_sftp_open() for READ and WRITE.\n");

/* Request a file via SFTP */

sftp_handle = libssh2_sftp_open(sftp_session, sftppath,

LIBSSH2_FXF_WRITE |

LIBSSH2_FXF_READ,

LIBSSH2_SFTP_S_IRUSR |

LIBSSH2_SFTP_S_IWUSR |

LIBSSH2_SFTP_S_IRGRP |

LIBSSH2_SFTP_S_IROTH);

if(!sftp_handle) {

fprintf(stderr, "Unable to open file with SFTP: %ld\n",

libssh2_sftp_last_error(sftp_session));

goto shutdown;

}

if(libssh2_sftp_fstat_ex(sftp_handle, &attrs, 0) < 0) {

fprintf(stderr, "libssh2_sftp_fstat_ex failed\n");

goto shutdown;

}

else

libssh2_sftp_seek64(sftp_handle, attrs.filesize);

fprintf(stderr, "Did a seek to position %ld\n", (long) attrs.filesize);

fprintf(stderr, "libssh2_sftp_open() a handle for APPEND\n");

if(!sftp_handle) {

fprintf(stderr, "Unable to open file with SFTP: %ld\n",

libssh2_sftp_last_error(sftp_session));

goto shutdown;

}

fprintf(stderr, "libssh2_sftp_open() is done, now send data.\n");

do {

nread = fread(mem, 1, sizeof(mem), local);

if(nread <= 0) {

/* end of file */

break;

}

ptr = mem;

do {

/* write data in a loop until we block */

nwritten = libssh2_sftp_write(sftp_handle, ptr, nread);

if(nwritten < 0)

break;

ptr += nwritten;

nread -= (size_t)nwritten;

} while(nread);

} while(nwritten > 0);

libssh2_sftp_close(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);

}

if(local)

fclose(local);

fprintf(stderr, "all done\n");

libssh2_exit();

#ifdef _WIN32

WSACleanup();

return 0;

}