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/*
* Sample showing how to do SFTP append of a local file onto a remote one.
*
* The sample code has default values for host name, user name, password
* and path to copy, but you can specify them on the command line like:
*
* sftp_append 192.168.0.1 user password localfile /tmp/remotefile
*/
#include "libssh2_config.h"
#include <libssh2.h>
#include <libssh2_sftp.h>
#ifdef HAVE_WINSOCK2_H
# include <winsock2.h>
#endif
#ifdef HAVE_SYS_SOCKET_H
# include <sys/socket.h>
#endif
#ifdef HAVE_NETINET_IN_H
# include <netinet/in.h>
#endif
# ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_ARPA_INET_H
# include <arpa/inet.h>
#endif
#include <sys/types.h>
#include <fcntl.h>
#include <errno.h>
#include <stdio.h>
#include <ctype.h>
int main(int argc, char *argv[])
{
unsigned long hostaddr;
int sock, i, auth_pw = 1;
struct sockaddr_in sin;
const char *fingerprint;
LIBSSH2_SESSION *session;
const char *username="username";
const char *password="password";
const char *loclfile="sftp_write.c";
const char *sftppath="/tmp/TEST";
int rc;
FILE *local;
LIBSSH2_SFTP *sftp_session;
LIBSSH2_SFTP_HANDLE *sftp_handle;
LIBSSH2_SFTP_ATTRIBUTES attrs;
char mem[1024*100];
size_t nread;
char *ptr;
#ifdef WIN32
WSADATA wsadata;
int err;
err = WSAStartup(MAKEWORD(2,0), &wsadata);
if (err != 0) {
fprintf(stderr, "WSAStartup failed with error: %d\n", err);
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) {
loclfile = argv[4];
}
if(argc > 5) {
sftppath = argv[5];
}
rc = libssh2_init (0);
if (rc != 0) {
fprintf (stderr, "libssh2 initialization failed (%d)\n", rc);
return 1;
}
local = fopen(loclfile, "rb");
if (!local) {
fprintf(stderr, "Can't open local file %s\n", loclfile);
return -1;
}
/*
* The application code is responsible for creating the socket
* and establishing the connection
*/
sock = socket(AF_INET, SOCK_STREAM, 0);
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)) != 0) {
fprintf(stderr, "failed to connect!\n");
return -1;
}
/* Create a session instance
*/
session = libssh2_session_init();
if(!session)
return -1;
/* 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,
* and setup crypto, compression, and MAC layers
*/
rc = libssh2_session_handshake(session, sock);
if(rc) {
fprintf(stderr, "Failure establishing SSH session: %d\n", rc);
return -1;
}
/* At this point we havn't 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");
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,
"/home/username/.ssh/id_rsa.pub",
"/home/username/.ssh/id_rsa",
password)) {
fprintf(stderr, "\tAuthentication 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\n");
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\n");
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 */
rc = libssh2_sftp_write(sftp_handle, ptr, nread);
if(rc < 0)
break;
ptr += rc;
nread -= rc;
} while (nread);
} while (rc > 0);
libssh2_sftp_close(sftp_handle);
libssh2_sftp_shutdown(sftp_session);
shutdown:
libssh2_session_disconnect(session,
"Normal Shutdown, Thank you for playing");
libssh2_session_free(session);
#ifdef WIN32
closesocket(sock);
#else
close(sock);
#endif
if (local)
fclose(local);
fprintf(stderr, "all done\n");
libssh2_exit();
return 0;
}
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