| #include "libssh2.h" |
| |
| #ifndef WIN32 |
| # include <netinet/in.h> |
| # include <sys/socket.h> |
| # include <unistd.h> |
| #else |
| # include <winsock2.h> |
| #endif |
| |
| #include <sys/types.h> |
| #include <fcntl.h> |
| #include <errno.h> |
| #include <stdio.h> |
| #include <ctype.h> |
| |
| int main(int argc, char *argv[]) { |
| int sock, i, auth_pw = 1; |
| struct sockaddr_in sin; |
| char *fingerprint; |
| LIBSSH2_SESSION *session; |
| LIBSSH2_CHANNEL *channel; |
| #ifdef WIN32 |
| WSADATA wsadata; |
| |
| WSAStartup(WINSOCK_VERSION, &wsadata); |
| #endif |
| |
| /* 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); |
| #ifndef WIN32 |
| fcntl(sock, F_SETFL, 0); |
| #endif |
| sin.sin_family = AF_INET; |
| sin.sin_port = htons(22); |
| sin.sin_addr.s_addr = htonl(0x7F000001); |
| 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_startup(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_MD5); |
| printf("Fingerprint: "); |
| for(i = 0; i < 16; i++) { |
| printf("%02X ", (unsigned char)fingerprint[i]); |
| } |
| printf("\n"); |
| |
| if (auth_pw) { |
| /* We could authenticate via password */ |
| if (libssh2_userauth_password(session, "username", "password")) { |
| printf("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", "pasphrase")) { |
| printf("\tAuthentication by public key failed\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 |
| Sleep(1000); |
| closesocket(sock); |
| #else |
| sleep(1); |
| close(sock); |
| #endif |
| printf("all done\n"); |
| return 0; |
| } |