| /* |
| * Sample showing how to do SSH2 connect. |
| * |
| * 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: |
| * |
| * "ssh2 host user password [-p|-i|-k]" |
| */ |
| |
| #include "libssh2_config.h" |
| #include <libssh2.h> |
| #include <libssh2_sftp.h> |
| |
| #ifdef HAVE_WINDOWS_H |
| # include <windows.h> |
| #endif |
| #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> |
| |
| |
| const char *keyfile1="~/.ssh/id_rsa.pub"; |
| const char *keyfile2="~/.ssh/id_rsa"; |
| const char *username="username"; |
| const char *password="password"; |
| |
| |
| 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) |
| { |
| (void)name; |
| (void)name_len; |
| (void)instruction; |
| (void)instruction_len; |
| if (num_prompts == 1) { |
| responses[0].text = strdup(password); |
| responses[0].length = strlen(password); |
| } |
| (void)prompts; |
| (void)abstract; |
| } /* kbd_callback */ |
| |
| |
| int main(int argc, char *argv[]) |
| { |
| unsigned long hostaddr; |
| int rc, sock, i, auth_pw = 0; |
| struct sockaddr_in sin; |
| const char *fingerprint; |
| char *userauthlist; |
| LIBSSH2_SESSION *session; |
| LIBSSH2_CHANNEL *channel; |
| #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]; |
| } |
| |
| rc = libssh2_init (0); |
| if (rc != 0) { |
| fprintf (stderr, "libssh2 initialization failed (%d)\n", rc); |
| return 1; |
| } |
| |
| /* Ultra basic "connect to port 22 on localhost". Your code is |
| * responsible for creating the socket 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 and start it up. This will trade welcome |
| * banners, exchange keys, and setup crypto, compression, and MAC layers |
| */ |
| session = libssh2_session_init(); |
| if (libssh2_session_handshake(session, sock)) { |
| fprintf(stderr, "Failure establishing SSH session\n"); |
| return -1; |
| } |
| |
| /* At this point we havn't 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 > 4) { |
| if ((auth_pw & 1) && !strcasecmp(argv[4], "-p")) { |
| auth_pw = 1; |
| } |
| if ((auth_pw & 2) && !strcasecmp(argv[4], "-i")) { |
| auth_pw = 2; |
| } |
| if ((auth_pw & 4) && !strcasecmp(argv[4], "-k")) { |
| auth_pw = 4; |
| } |
| } |
| |
| if (auth_pw & 1) { |
| /* We could authenticate via password */ |
| if (libssh2_userauth_password(session, username, password)) { |
| fprintf(stderr, "\tAuthentication by password failed!\n"); |
| goto shutdown; |
| } else { |
| fprintf(stderr, "\tAuthentication by password succeeded.\n"); |
| } |
| } 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; |
| } |
| |
| /* Request a shell */ |
| if (!(channel = libssh2_channel_open_session(session))) { |
| fprintf(stderr, "Unable to open a session\n"); |
| goto shutdown; |
| } |
| |
| /* Some environment variables may be set, |
| * It's up to the server which ones it'll allow though |
| */ |
| libssh2_channel_setenv(channel, "FOO", "bar"); |
| |
| /* Request a terminal with 'vanilla' terminal emulation |
| * See /etc/termcap for more options |
| */ |
| if (libssh2_channel_request_pty(channel, "vanilla")) { |
| fprintf(stderr, "Failed requesting pty\n"); |
| goto skip_shell; |
| } |
| |
| /* Open a SHELL on that pty */ |
| if (libssh2_channel_shell(channel)) { |
| fprintf(stderr, "Unable to request shell on allocated pty\n"); |
| goto shutdown; |
| } |
| |
| /* At this point the shell can be interacted with using |
| * libssh2_channel_read() |
| * libssh2_channel_read_stderr() |
| * libssh2_channel_write() |
| * libssh2_channel_write_stderr() |
| * |
| * Blocking mode may be (en|dis)abled with: libssh2_channel_set_blocking() |
| * If the server send EOF, libssh2_channel_eof() will return non-0 |
| * To send EOF to the server use: libssh2_channel_send_eof() |
| * A channel can be closed with: libssh2_channel_close() |
| * A channel can be freed with: libssh2_channel_free() |
| */ |
| |
| skip_shell: |
| if (channel) { |
| libssh2_channel_free(channel); |
| channel = NULL; |
| } |
| |
| /* Other channel types are supported via: |
| * libssh2_scp_send() |
| * libssh2_scp_recv() |
| * libssh2_channel_direct_tcpip() |
| */ |
| |
| shutdown: |
| |
| libssh2_session_disconnect(session, |
| "Normal Shutdown, Thank you for playing"); |
| libssh2_session_free(session); |
| |
| #ifdef WIN32 |
| closesocket(sock); |
| #else |
| close(sock); |
| #endif |
| fprintf(stderr, "all done!\n"); |
| |
| libssh2_exit(); |
| |
| return 0; |
| } |
