| /* |
| * Sample showing how to do SFTP 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 /tmp/secrets -p|-i|-k" |
| */ |
| |
| #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 |
| #ifdef HAVE_SYS_TIME_H |
| # include <sys/time.h> |
| #endif |
| |
| #include <sys/types.h> |
| #include <fcntl.h> |
| #include <errno.h> |
| #include <stdio.h> |
| #include <ctype.h> |
| |
| |
| const char *keyfile1 = "~/.ssh/id_rsa.pub"; |
| const char *keyfile2 = "~/.ssh/id_rsa"; |
| const char *username = "username"; |
| const char *password = "password"; |
| const char *sftppath = "/tmp/TEST"; |
| |
| |
| static void 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) |
| { |
| int i; |
| size_t n; |
| char buf[1024]; |
| (void)abstract; |
| |
| fprintf(stderr, "Performing keyboard-interactive authentication.\n"); |
| |
| fprintf(stderr, "Authentication name: '"); |
| fwrite(name, 1, name_len, stderr); |
| fprintf(stderr, "'\n"); |
| |
| fprintf(stderr, "Authentication instruction: '"); |
| fwrite(instruction, 1, instruction_len, stderr); |
| fprintf(stderr, "'\n"); |
| |
| fprintf(stderr, "Number of prompts: %d\n\n", num_prompts); |
| |
| for(i = 0; i < num_prompts; i++) { |
| fprintf(stderr, "Prompt %d from server: '", i); |
| fwrite(prompts[i].text, 1, prompts[i].length, stderr); |
| fprintf(stderr, "'\n"); |
| |
| fprintf(stderr, "Please type response: "); |
| fgets(buf, sizeof(buf), stdin); |
| n = strlen(buf); |
| while(n > 0 && strchr("\r\n", buf[n - 1])) |
| n--; |
| buf[n] = 0; |
| |
| responses[i].text = strdup(buf); |
| responses[i].length = n; |
| |
| fprintf(stderr, "Response %d from user is '", i); |
| fwrite(responses[i].text, 1, responses[i].length, stderr); |
| fprintf(stderr, "'\n\n"); |
| } |
| |
| fprintf(stderr, |
| "Done. Sending keyboard-interactive responses to server now.\n"); |
| } |
| |
| |
| int main(int argc, char *argv[]) |
| { |
| unsigned long hostaddr; |
| int sock, i, auth_pw = 0; |
| struct sockaddr_in sin; |
| const char *fingerprint; |
| char *userauthlist; |
| LIBSSH2_SESSION *session; |
| int rc; |
| LIBSSH2_SFTP *sftp_session; |
| LIBSSH2_SFTP_HANDLE *sftp_handle; |
| |
| #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) { |
| sftppath = argv[4]; |
| } |
| |
| rc = libssh2_init(0); |
| if(rc != 0) { |
| fprintf(stderr, "libssh2 initialization failed (%d)\n", rc); |
| 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"); |
| |
| /* check what authentication methods are available */ |
| userauthlist = libssh2_userauth_list(session, username, strlen(username)); |
| fprintf(stderr, "Authentication methods: %s\n", userauthlist); |
| if(strstr(userauthlist, "password") != NULL) { |
| auth_pw |= 1; |
| } |
| if(strstr(userauthlist, "keyboard-interactive") != NULL) { |
| auth_pw |= 2; |
| } |
| if(strstr(userauthlist, "publickey") != NULL) { |
| auth_pw |= 4; |
| } |
| |
| /* if we got an 4. argument we set this option if supported */ |
| if(argc > 5) { |
| if((auth_pw & 1) && !strcasecmp(argv[5], "-p")) { |
| auth_pw = 1; |
| } |
| if((auth_pw & 2) && !strcasecmp(argv[5], "-i")) { |
| auth_pw = 2; |
| } |
| if((auth_pw & 4) && !strcasecmp(argv[5], "-k")) { |
| auth_pw = 4; |
| } |
| } |
| |
| if(auth_pw & 1) { |
| /* We could authenticate via password */ |
| if(libssh2_userauth_password(session, username, password)) { |
| fprintf(stderr, "Authentication by password failed.\n"); |
| goto shutdown; |
| } |
| } |
| else if(auth_pw & 2) { |
| /* Or via keyboard-interactive */ |
| if(libssh2_userauth_keyboard_interactive(session, username, |
| &kbd_callback) ) { |
| fprintf(stderr, |
| "\tAuthentication by keyboard-interactive failed!\n"); |
| goto shutdown; |
| } |
| else { |
| fprintf(stderr, |
| "\tAuthentication by keyboard-interactive succeeded.\n"); |
| } |
| } |
| else if(auth_pw & 4) { |
| /* Or by public key */ |
| if(libssh2_userauth_publickey_fromfile(session, username, keyfile1, |
| keyfile2, password)) { |
| fprintf(stderr, "\tAuthentication by public key failed!\n"); |
| goto shutdown; |
| } |
| else { |
| fprintf(stderr, "\tAuthentication by public key succeeded.\n"); |
| } |
| } |
| else { |
| fprintf(stderr, "No supported authentication methods found!\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_READ, 0); |
| |
| 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 receive data!\n"); |
| do { |
| char mem[1024]; |
| |
| /* loop until we fail */ |
| fprintf(stderr, "libssh2_sftp_read()!\n"); |
| rc = libssh2_sftp_read(sftp_handle, mem, sizeof(mem)); |
| if(rc > 0) { |
| write(1, mem, rc); |
| } |
| else { |
| break; |
| } |
| } while(1); |
| |
| libssh2_sftp_close(sftp_handle); |
| libssh2_sftp_shutdown(sftp_session); |
| |
| shutdown: |
| |
| libssh2_session_disconnect(session, "Normal Shutdown"); |
| libssh2_session_free(session); |
| |
| #ifdef WIN32 |
| closesocket(sock); |
| #else |
| close(sock); |
| #endif |
| fprintf(stderr, "all done\n"); |
| |
| libssh2_exit(); |
| |
| return 0; |
| } |
