/* * Sample showing how to do SFTP write transfers. * * 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 192.168.0.1 user password sftp_write.c /tmp/secrets" */ #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;    char mem[1024*100];    size_t nread;    char *ptr; #ifdef WIN32    WSADATA wsadata;     WSAStartup(MAKEWORD(2,0), &wsadata);#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()!\n");    /* Request a file via SFTP */    sftp_handle =        libssh2_sftp_open(sftp_session, sftppath,                      LIBSSH2_FXF_WRITE|LIBSSH2_FXF_CREAT|LIBSSH2_FXF_TRUNC,                      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;    }    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;}