/* * Sample showing how to do SFTP write 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 sftp_write.c /tmp/secrets" */ #include "libssh2_config.h" #include #include #ifdef HAVE_WINSOCK2_H # include #endif #ifdef HAVE_SYS_SOCKET_H # include #endif #ifdef HAVE_NETINET_IN_H # include #endif # ifdef HAVE_UNISTD_H #include #endif #ifdef HAVE_ARPA_INET_H # include #endif #include #include #include #include #include int main(int argc, char *argv[]) { unsigned long hostaddr; int sock, i, auth_pw = 1; struct sockaddr_in sin; const char *fingerprint; LIBSSH2_SESSION *session; const char *username = "username"; const char *password = "password"; const char *loclfile = "sftp_write.c"; const char *sftppath = "/tmp/TEST"; int rc; FILE *local; LIBSSH2_SFTP *sftp_session; LIBSSH2_SFTP_HANDLE *sftp_handle; char mem[1024*100]; size_t nread; char *ptr; #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) { loclfile = argv[4]; } if(argc > 5) { sftppath = argv[5]; } rc = libssh2_init(0); if(rc != 0) { fprintf(stderr, "libssh2 initialization failed (%d)\n", rc); return 1; } local = fopen(loclfile, "rb"); if(!local) { fprintf(stderr, "Can't open local file %s\n", loclfile); 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"); if(auth_pw) { /* We could authenticate via password */ if(libssh2_userauth_password(session, username, password)) { fprintf(stderr, "Authentication by password failed.\n"); goto shutdown; } } else { /* Or by public key */ const char *pubkey = "/home/username/.ssh/id_rsa.pub"; const char *privkey = "/home/username/.ssh/id_rsa.pub"; if(libssh2_userauth_publickey_fromfile(session, username, pubkey, privkey, password)) { fprintf(stderr, "\tAuthentication by public key failed\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_WRITE|LIBSSH2_FXF_CREAT|LIBSSH2_FXF_TRUNC, LIBSSH2_SFTP_S_IRUSR|LIBSSH2_SFTP_S_IWUSR| LIBSSH2_SFTP_S_IRGRP|LIBSSH2_SFTP_S_IROTH); if(!sftp_handle) { fprintf(stderr, "Unable to open file with SFTP\n"); goto shutdown; } fprintf(stderr, "libssh2_sftp_open() is done, now send data!\n"); do { nread = fread(mem, 1, sizeof(mem), local); if(nread <= 0) { /* end of file */ break; } ptr = mem; do { /* write data in a loop until we block */ rc = libssh2_sftp_write(sftp_handle, ptr, nread); if(rc < 0) break; ptr += rc; nread -= rc; } while(nread); } while(rc > 0); libssh2_sftp_close(sftp_handle); libssh2_sftp_shutdown(sftp_session); shutdown: libssh2_session_disconnect(session, "Normal Shutdown, Thank you for playing"); libssh2_session_free(session); #ifdef WIN32 closesocket(sock); #else close(sock); #endif if(local) fclose(local); fprintf(stderr, "all done\n"); libssh2_exit(); return 0; }