1 /*
2 * Sample doing an SFTP directory listing.
3 *
4 * The sample code has default values for host name, user name, password and
5 * path, but you can specify them on the command line like:
6 *
7 * "sftpdir 192.168.0.1 user password /tmp/secretdir"
8 */
9
10 #include "libssh2_config.h"
11 #include <libssh2.h>
12 #include <libssh2_sftp.h>
13
14 #ifdef HAVE_WINSOCK2_H
15 # include <winsock2.h>
16 #endif
17 #ifdef HAVE_SYS_SOCKET_H
18 # include <sys/socket.h>
19 #endif
20 #ifdef HAVE_NETINET_IN_H
21 # include <netinet/in.h>
22 #endif
23 #ifdef HAVE_UNISTD_H
24 # include <unistd.h>
25 #endif
26 #ifdef HAVE_ARPA_INET_H
27 # include <arpa/inet.h>
28 #endif
29 #ifdef HAVE_INTTYPES_H
30 # include <inttypes.h>
31 #endif
32
33 #include <sys/types.h>
34 #include <fcntl.h>
35 #include <errno.h>
36 #include <stdio.h>
37 #include <ctype.h>
38
39 #ifdef WIN32
40 #define __FILESIZE "I64"
41 #else
42 #define __FILESIZE "llu"
43 #endif
44
45 const char *keyfile1 = "~/.ssh/id_rsa.pub";
46 const char *keyfile2 = "~/.ssh/id_rsa";
47 const char *username = "username";
48 const char *password = "password";
49
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)50 static void kbd_callback(const char *name, int name_len,
51 const char *instruction, int instruction_len,
52 int num_prompts,
53 const LIBSSH2_USERAUTH_KBDINT_PROMPT *prompts,
54 LIBSSH2_USERAUTH_KBDINT_RESPONSE *responses,
55 void **abstract)
56 {
57 (void)name;
58 (void)name_len;
59 (void)instruction;
60 (void)instruction_len;
61 if(num_prompts == 1) {
62 responses[0].text = strdup(password);
63 responses[0].length = strlen(password);
64 }
65 (void)prompts;
66 (void)abstract;
67 } /* kbd_callback */
68
main(int argc,char * argv[])69 int main(int argc, char *argv[])
70 {
71 unsigned long hostaddr;
72 int rc, sock, i, auth_pw = 0;
73 struct sockaddr_in sin;
74 const char *fingerprint;
75 char *userauthlist;
76 LIBSSH2_SESSION *session;
77 const char *sftppath = "/tmp/secretdir";
78 LIBSSH2_SFTP *sftp_session;
79 LIBSSH2_SFTP_HANDLE *sftp_handle;
80
81 #ifdef WIN32
82 WSADATA wsadata;
83 int err;
84
85 err = WSAStartup(MAKEWORD(2, 0), &wsadata);
86 if(err != 0) {
87 fprintf(stderr, "WSAStartup failed with error: %d\n", err);
88 return 1;
89 }
90 #endif
91
92 if(argc > 1) {
93 hostaddr = inet_addr(argv[1]);
94 }
95 else {
96 hostaddr = htonl(0x7F000001);
97 }
98
99 if(argc > 2) {
100 username = argv[2];
101 }
102 if(argc > 3) {
103 password = argv[3];
104 }
105 if(argc > 4) {
106 sftppath = argv[4];
107 }
108
109 rc = libssh2_init(0);
110 if(rc != 0) {
111 fprintf(stderr, "libssh2 initialization failed (%d)\n", rc);
112 return 1;
113 }
114
115 /*
116 * The application code is responsible for creating the socket
117 * and establishing the connection
118 */
119 sock = socket(AF_INET, SOCK_STREAM, 0);
120
121 sin.sin_family = AF_INET;
122 sin.sin_port = htons(22);
123 sin.sin_addr.s_addr = hostaddr;
124 if(connect(sock, (struct sockaddr*)(&sin),
125 sizeof(struct sockaddr_in)) != 0) {
126 fprintf(stderr, "failed to connect!\n");
127 return -1;
128 }
129
130 /* Create a session instance
131 */
132 session = libssh2_session_init();
133 if(!session)
134 return -1;
135
136 /* ... start it up. This will trade welcome banners, exchange keys,
137 * and setup crypto, compression, and MAC layers
138 */
139 rc = libssh2_session_handshake(session, sock);
140 if(rc) {
141 fprintf(stderr, "Failure establishing SSH session: %d\n", rc);
142 return -1;
143 }
144
145 /* At this point we havn't yet authenticated. The first thing to do
146 * is check the hostkey's fingerprint against our known hosts Your app
147 * may have it hard coded, may go to a file, may present it to the
148 * user, that's your call
149 */
150 fingerprint = libssh2_hostkey_hash(session, LIBSSH2_HOSTKEY_HASH_SHA1);
151 fprintf(stderr, "Fingerprint: ");
152 for(i = 0; i < 20; i++) {
153 fprintf(stderr, "%02X ", (unsigned char)fingerprint[i]);
154 }
155 fprintf(stderr, "\n");
156
157 /* check what authentication methods are available */
158 userauthlist = libssh2_userauth_list(session, username, strlen(username));
159 fprintf(stderr, "Authentication methods: %s\n", userauthlist);
160 if(strstr(userauthlist, "password") != NULL) {
161 auth_pw |= 1;
162 }
163 if(strstr(userauthlist, "keyboard-interactive") != NULL) {
164 auth_pw |= 2;
165 }
166 if(strstr(userauthlist, "publickey") != NULL) {
167 auth_pw |= 4;
168 }
169
170 /* if we got an 5. argument we set this option if supported */
171 if(argc > 5) {
172 if((auth_pw & 1) && !strcasecmp(argv[5], "-p")) {
173 auth_pw = 1;
174 }
175 if((auth_pw & 2) && !strcasecmp(argv[5], "-i")) {
176 auth_pw = 2;
177 }
178 if((auth_pw & 4) && !strcasecmp(argv[5], "-k")) {
179 auth_pw = 4;
180 }
181 }
182
183 if(auth_pw & 1) {
184 /* We could authenticate via password */
185 if(libssh2_userauth_password(session, username, password)) {
186 fprintf(stderr, "\tAuthentication by password failed!\n");
187 goto shutdown;
188 }
189 else {
190 fprintf(stderr, "\tAuthentication by password succeeded.\n");
191 }
192 }
193 else if(auth_pw & 2) {
194 /* Or via keyboard-interactive */
195 if(libssh2_userauth_keyboard_interactive(session, username,
196 &kbd_callback) ) {
197 fprintf(stderr,
198 "\tAuthentication by keyboard-interactive failed!\n");
199 goto shutdown;
200 }
201 else {
202 fprintf(stderr,
203 "\tAuthentication by keyboard-interactive succeeded.\n");
204 }
205 }
206 else if(auth_pw & 4) {
207 /* Or by public key */
208 if(libssh2_userauth_publickey_fromfile(session, username, keyfile1,
209 keyfile2, password)) {
210 fprintf(stderr, "\tAuthentication by public key failed!\n");
211 goto shutdown;
212 }
213 else {
214 fprintf(stderr, "\tAuthentication by public key succeeded.\n");
215 }
216 }
217 else {
218 fprintf(stderr, "No supported authentication methods found!\n");
219 goto shutdown;
220 }
221
222 fprintf(stderr, "libssh2_sftp_init()!\n");
223 sftp_session = libssh2_sftp_init(session);
224
225 if(!sftp_session) {
226 fprintf(stderr, "Unable to init SFTP session\n");
227 goto shutdown;
228 }
229
230 /* Since we have not set non-blocking, tell libssh2 we are blocking */
231 libssh2_session_set_blocking(session, 1);
232
233 fprintf(stderr, "libssh2_sftp_opendir()!\n");
234 /* Request a dir listing via SFTP */
235 sftp_handle = libssh2_sftp_opendir(sftp_session, sftppath);
236
237 if(!sftp_handle) {
238 fprintf(stderr, "Unable to open dir with SFTP\n");
239 goto shutdown;
240 }
241 fprintf(stderr, "libssh2_sftp_opendir() is done, now receive listing!\n");
242 do {
243 char mem[512];
244 char longentry[512];
245 LIBSSH2_SFTP_ATTRIBUTES attrs;
246
247 /* loop until we fail */
248 rc = libssh2_sftp_readdir_ex(sftp_handle, mem, sizeof(mem),
249 longentry, sizeof(longentry), &attrs);
250 if(rc > 0) {
251 /* rc is the length of the file name in the mem
252 buffer */
253
254 if(longentry[0] != '\0') {
255 printf("%s\n", longentry);
256 }
257 else {
258 if(attrs.flags & LIBSSH2_SFTP_ATTR_PERMISSIONS) {
259 /* this should check what permissions it
260 is and print the output accordingly */
261 printf("--fix----- ");
262 }
263 else {
264 printf("---------- ");
265 }
266
267 if(attrs.flags & LIBSSH2_SFTP_ATTR_UIDGID) {
268 printf("%4d %4d ", (int) attrs.uid, (int) attrs.gid);
269 }
270 else {
271 printf(" - - ");
272 }
273
274 if(attrs.flags & LIBSSH2_SFTP_ATTR_SIZE) {
275 printf("%8" __FILESIZE " ", attrs.filesize);
276 }
277
278 printf("%s\n", mem);
279 }
280 }
281 else
282 break;
283
284 } while(1);
285
286 libssh2_sftp_closedir(sftp_handle);
287 libssh2_sftp_shutdown(sftp_session);
288
289 shutdown:
290
291 libssh2_session_disconnect(session, "Normal Shutdown");
292 libssh2_session_free(session);
293
294 #ifdef WIN32
295 closesocket(sock);
296 #else
297 close(sock);
298 #endif
299 fprintf(stderr, "all done\n");
300
301 libssh2_exit();
302
303 return 0;
304 }
305