simple (blocking) SCP transfer

example/simple/scp.c

@@ -0,0 +1,157 @@
+/*
+ * $Id: scp.c,v 1.1 2007/01/30 11:07:14 bagder Exp $
+ *
+ * Sample showing how to do a simple SCP transfer.
+ */
+
+#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;
+	const char *fingerprint;
+	LIBSSH2_SESSION *session;
+	LIBSSH2_CHANNEL *channel;
+	char *username=(char *)"username";
+	char *password=(char *)"password";
+	char *scppath=(char *)"/tmp/TEST";
+	struct stat fileinfo;
+	int rc;
+
+#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);
+
+	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;
+	}
+
+	/* We set the socket non-blocking. We do it after the connect just to
+	   simplify the example code. */
+#ifdef F_SETFL
+	/* FIXME: this can/should be done in a more portable manner */
+	rc = fcntl(sock, F_GETFL, 0);
+	fcntl(sock, F_SETFL, rc | O_NONBLOCK);
+#else
+#error "add support for setting the socket non-blocking here"
+#endif
+
+	/* Create a session instance
+	 */
+	session = libssh2_session_init();
+	if(!session)
+		return -1;
+
+	/* ... start it up. This will trade welcome banners, exchange keys,
+	 * and setup crypto, compression, and MAC layers
+	 */
+	rc = libssh2_session_startup(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_MD5);
+	printf("Fingerprint: ");
+	for(i = 0; i < 16; i++) {
+		printf("%02X ", (unsigned char)fingerprint[i]);
+	}
+	printf("\n");
+
+	if(argc > 1) {
+		username = argv[1];
+	}
+	if(argc > 2) {
+		password = argv[2];
+	}
+	if(argc > 3) {
+		scppath = argv[3];
+	}
+
+	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",
+							password)) {
+			printf("\tAuthentication by public key failed\n");
+			goto shutdown;
+		}
+	}
+
+	/* Request a file via SCP */
+	channel = libssh2_scp_recv(session, scppath, &fileinfo);
+
+	if (!channel) {
+		fprintf(stderr, "Unable to open a session\n");
+		goto shutdown;
+	}
+
+	do {
+		char mem[1024];
+		/* loop until we fail */
+		rc = libssh2_channel_read(channel, mem, sizeof(mem));
+		fprintf(stderr, "libssh2_channel_read returned %d\n",
+			rc);
+		if(rc > 0) {
+			write(2, mem, rc);
+		}
+	} while (rc > 0);
+
+	libssh2_channel_free(channel);
+	channel = NULL;
+
+ 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;
+}