302 lines
8.4 KiB
C
302 lines
8.4 KiB
C
/*
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* Sample doing an SFTP directory listing.
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*
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* The sample code has default values for host name, user name, password and
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* path, but you can specify them on the command line like:
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*
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* "sftpdir 192.168.0.1 user password /tmp/secretdir"
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*/
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#include "libssh2_config.h"
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#include <libssh2.h>
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#include <libssh2_sftp.h>
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#ifdef HAVE_WINSOCK2_H
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# include <winsock2.h>
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#endif
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#ifdef HAVE_SYS_SOCKET_H
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# include <sys/socket.h>
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#endif
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#ifdef HAVE_NETINET_IN_H
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# include <netinet/in.h>
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#endif
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#ifdef HAVE_UNISTD_H
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# include <unistd.h>
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#endif
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#ifdef HAVE_ARPA_INET_H
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# include <arpa/inet.h>
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#endif
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#ifdef HAVE_INTTYPES_H
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# include <inttypes.h>
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#endif
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#include <sys/types.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <stdio.h>
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#include <ctype.h>
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/* last resort for systems not defining PRIu64 in inttypes.h */
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#ifndef __PRI64_PREFIX
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#ifdef WIN32
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#define __PRI64_PREFIX "I64"
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#else
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#if __WORDSIZE == 64
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#define __PRI64_PREFIX "l"
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#else
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#define __PRI64_PREFIX "ll"
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#endif /* __WORDSIZE */
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#endif /* WIN32 */
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#endif /* !__PRI64_PREFIX */
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#ifndef PRIu64
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#define PRIu64 __PRI64_PREFIX "u"
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#endif /* PRIu64 */
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const char *keyfile1="~/.ssh/id_rsa.pub";
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const char *keyfile2="~/.ssh/id_rsa";
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const char *username="username";
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const char *password="password";
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static void kbd_callback(const char *name, int name_len,
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const char *instruction, int instruction_len,
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int num_prompts,
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const LIBSSH2_USERAUTH_KBDINT_PROMPT *prompts,
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LIBSSH2_USERAUTH_KBDINT_RESPONSE *responses,
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void **abstract)
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{
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(void)name;
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(void)name_len;
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(void)instruction;
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(void)instruction_len;
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if (num_prompts == 1) {
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responses[0].text = strdup(password);
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responses[0].length = strlen(password);
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}
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(void)prompts;
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(void)abstract;
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} /* kbd_callback */
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int main(int argc, char *argv[])
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{
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unsigned long hostaddr;
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int rc, sock, i, auth_pw = 0;
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struct sockaddr_in sin;
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const char *fingerprint;
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char *userauthlist;
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LIBSSH2_SESSION *session;
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const char *sftppath="/tmp/secretdir";
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LIBSSH2_SFTP *sftp_session;
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LIBSSH2_SFTP_HANDLE *sftp_handle;
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#ifdef WIN32
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WSADATA wsadata;
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WSAStartup(MAKEWORD(2,0), &wsadata);
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#endif
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if (argc > 1) {
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hostaddr = inet_addr(argv[1]);
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} else {
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hostaddr = htonl(0x7F000001);
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}
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if(argc > 2) {
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username = argv[2];
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}
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if(argc > 3) {
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password = argv[3];
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}
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if(argc > 4) {
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sftppath = argv[4];
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}
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rc = libssh2_init (0);
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if (rc != 0) {
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fprintf (stderr, "libssh2 initialization failed (%d)\n", rc);
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return 1;
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}
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/*
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* The application code is responsible for creating the socket
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* and establishing the connection
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*/
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sock = socket(AF_INET, SOCK_STREAM, 0);
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sin.sin_family = AF_INET;
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sin.sin_port = htons(22);
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sin.sin_addr.s_addr = hostaddr;
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if (connect(sock, (struct sockaddr*)(&sin),
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sizeof(struct sockaddr_in)) != 0) {
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fprintf(stderr, "failed to connect!\n");
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return -1;
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}
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/* Create a session instance
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*/
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session = libssh2_session_init();
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if(!session)
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return -1;
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/* ... start it up. This will trade welcome banners, exchange keys,
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* and setup crypto, compression, and MAC layers
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*/
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rc = libssh2_session_handshake(session, sock);
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if(rc) {
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fprintf(stderr, "Failure establishing SSH session: %d\n", rc);
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return -1;
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}
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/* At this point we havn't yet authenticated. The first thing to do
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* is check the hostkey's fingerprint against our known hosts Your app
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* may have it hard coded, may go to a file, may present it to the
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* user, that's your call
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*/
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fingerprint = libssh2_hostkey_hash(session, LIBSSH2_HOSTKEY_HASH_SHA1);
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fprintf(stderr, "Fingerprint: ");
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for(i = 0; i < 20; i++) {
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fprintf(stderr, "%02X ", (unsigned char)fingerprint[i]);
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}
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fprintf(stderr, "\n");
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/* check what authentication methods are available */
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userauthlist = libssh2_userauth_list(session, username, strlen(username));
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fprintf(stderr, "Authentication methods: %s\n", userauthlist);
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if (strstr(userauthlist, "password") != NULL) {
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auth_pw |= 1;
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}
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if (strstr(userauthlist, "keyboard-interactive") != NULL) {
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auth_pw |= 2;
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}
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if (strstr(userauthlist, "publickey") != NULL) {
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auth_pw |= 4;
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}
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/* if we got an 5. argument we set this option if supported */
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if(argc > 5) {
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if ((auth_pw & 1) && !strcasecmp(argv[5], "-p")) {
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auth_pw = 1;
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}
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if ((auth_pw & 2) && !strcasecmp(argv[5], "-i")) {
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auth_pw = 2;
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}
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if ((auth_pw & 4) && !strcasecmp(argv[5], "-k")) {
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auth_pw = 4;
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}
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}
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if (auth_pw & 1) {
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/* We could authenticate via password */
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if (libssh2_userauth_password(session, username, password)) {
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fprintf(stderr, "\tAuthentication by password failed!\n");
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goto shutdown;
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} else {
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fprintf(stderr, "\tAuthentication by password succeeded.\n");
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}
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} else if (auth_pw & 2) {
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/* Or via keyboard-interactive */
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if (libssh2_userauth_keyboard_interactive(session, username,
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&kbd_callback) ) {
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fprintf(stderr,
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"\tAuthentication by keyboard-interactive failed!\n");
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goto shutdown;
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} else {
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fprintf(stderr,
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"\tAuthentication by keyboard-interactive succeeded.\n");
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}
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} else if (auth_pw & 4) {
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/* Or by public key */
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if (libssh2_userauth_publickey_fromfile(session, username, keyfile1,
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keyfile2, password)) {
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fprintf(stderr, "\tAuthentication by public key failed!\n");
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goto shutdown;
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} else {
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fprintf(stderr, "\tAuthentication by public key succeeded.\n");
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}
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} else {
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fprintf(stderr, "No supported authentication methods found!\n");
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goto shutdown;
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}
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fprintf(stderr, "libssh2_sftp_init()!\n");
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sftp_session = libssh2_sftp_init(session);
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if (!sftp_session) {
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fprintf(stderr, "Unable to init SFTP session\n");
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goto shutdown;
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}
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/* Since we have not set non-blocking, tell libssh2 we are blocking */
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libssh2_session_set_blocking(session, 1);
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fprintf(stderr, "libssh2_sftp_opendir()!\n");
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/* Request a dir listing via SFTP */
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sftp_handle = libssh2_sftp_opendir(sftp_session, sftppath);
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if (!sftp_handle) {
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fprintf(stderr, "Unable to open dir with SFTP\n");
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goto shutdown;
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}
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fprintf(stderr, "libssh2_sftp_opendir() is done, now receive listing!\n");
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do {
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char mem[512];
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char longentry[512];
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LIBSSH2_SFTP_ATTRIBUTES attrs;
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/* loop until we fail */
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rc = libssh2_sftp_readdir_ex(sftp_handle, mem, sizeof(mem),
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longentry, sizeof(longentry), &attrs);
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if(rc > 0) {
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/* rc is the length of the file name in the mem
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buffer */
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if (longentry[0] != '\0') {
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printf("%s\n", longentry);
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} else {
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if(attrs.flags & LIBSSH2_SFTP_ATTR_PERMISSIONS) {
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/* this should check what permissions it
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is and print the output accordingly */
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printf("--fix----- ");
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}
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else {
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printf("---------- ");
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}
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if(attrs.flags & LIBSSH2_SFTP_ATTR_UIDGID) {
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printf("%4ld %4ld ", attrs.uid, attrs.gid);
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}
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else {
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printf(" - - ");
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}
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if(attrs.flags & LIBSSH2_SFTP_ATTR_SIZE) {
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printf("%8" PRIu64 " ", attrs.filesize);
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}
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printf("%s\n", mem);
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}
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}
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else
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break;
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} while (1);
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libssh2_sftp_closedir(sftp_handle);
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libssh2_sftp_shutdown(sftp_session);
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shutdown:
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libssh2_session_disconnect(session, "Normal Shutdown, Thank you for playing");
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libssh2_session_free(session);
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#ifdef WIN32
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closesocket(sock);
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#else
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close(sock);
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#endif
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fprintf(stderr, "all done\n");
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libssh2_exit();
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return 0;
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}
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