/*
* scp.c - Scp (Secure Copy) client for PuTTY.
* Joris van Rantwijk, Simon Tatham
*
* This is mainly based on ssh-1.2.26/scp.c by Timo Rinne & Tatu Ylonen.
* They, in turn, used stuff from BSD rcp.
*
* (SGT, 2001-09-10: Joris van Rantwijk assures me that although
* this file as originally submitted was inspired by, and
* _structurally_ based on, ssh-1.2.26's scp.c, there wasn't any
* actual code duplicated, so the above comment shouldn't give rise
* to licensing issues.)
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <limits.h>
#include <time.h>
#include <assert.h>
#include "putty.h"
#include "psftp.h"
#include "ssh.h"
#include "sftp.h"
#include "storage.h"
static bool list = false;
static bool verbose = false;
static bool recursive = false;
static bool preserve = false;
static bool targetshouldbedirectory = false;
static bool statistics = true;
static int prev_stats_len = 0;
static bool scp_unsafe_mode = false;
static int errs = 0;
static bool try_scp = true;
static bool try_sftp = true;
static bool main_cmd_is_sftp = false;
static bool fallback_cmd_is_sftp = false;
static bool using_sftp = false;
static bool uploading = false;
static Backend *backend;
static Conf *conf;
static bool sent_eof = false;
static void source(const char *src);
static void rsource(const char *src);
static void sink(const char *targ, const char *src);
const char *const appname = "PSCP";
/*
* The maximum amount of queued data we accept before we stop and
* wait for the server to process some.
*/
#define MAX_SCP_BUFSIZE 16384
void ldisc_echoedit_update(Ldisc *ldisc) { }
static size_t pscp_output(Seat *, bool is_stderr, const void *, size_t);
static bool pscp_eof(Seat *);
static const SeatVtable pscp_seat_vt = {
.output = pscp_output,
.eof = pscp_eof,
.get_userpass_input = filexfer_get_userpass_input,
.notify_remote_exit = nullseat_notify_remote_exit,
.connection_fatal = console_connection_fatal,
.update_specials_menu = nullseat_update_specials_menu,
.get_ttymode = nullseat_get_ttymode,
.set_busy_status = nullseat_set_busy_status,
.verify_ssh_host_key = console_verify_ssh_host_key,
.confirm_weak_crypto_primitive = console_confirm_weak_crypto_primitive,
.confirm_weak_cached_hostkey = console_confirm_weak_cached_hostkey,
.is_utf8 = nullseat_is_never_utf8,
.echoedit_update = nullseat_echoedit_update,
.get_x_display = nullseat_get_x_display,
.get_windowid = nullseat_get_windowid,
.get_window_pixel_size = nullseat_get_window_pixel_size,
.stripctrl_new = console_stripctrl_new,
.set_trust_status = nullseat_set_trust_status_vacuously,
.verbose = cmdline_seat_verbose,
.interactive = nullseat_interactive_no,
.get_cursor_position = nullseat_get_cursor_position,
};
static Seat pscp_seat[1] = {{ &pscp_seat_vt }};
static void tell_char(FILE *stream, char c)
{
fputc(c, stream);
}
static void tell_str(FILE *stream, const char *str)
{
unsigned int i;
for (i = 0; i < strlen(str); ++i)
tell_char(stream, str[i]);
}
static void abandon_stats(void)
{
/*
* Output a \n to stdout (which is where we've been sending
* transfer statistics) so that the cursor will move to the next
* line. We should do this before displaying any other kind of
* output like an error message.
*/
if (prev_stats_len) {
putchar('\n');
fflush(stdout);
prev_stats_len = 0;
}
}
static PRINTF_LIKE(2, 3) void tell_user(FILE *stream, const char *fmt, ...)
{
char *str, *str2;
va_list ap;
va_start(ap, fmt);
str = dupvprintf(fmt, ap);
va_end(ap);
str2 = dupcat(str, "\n");
sfree(str);
abandon_stats();
tell_str(stream, str2);
sfree(str2);
}
/*
* Receive a block of data from the SSH link. Block until all data
* is available.
*
* To do this, we repeatedly call the SSH protocol module, with our
* own pscp_output() function to catch the data that comes back. We do
* this until we have enough data.
*/
static bufchain received_data;
static BinarySink *stderr_bs;
static size_t pscp_output(
Seat *seat, bool is_stderr, const void *data, size_t len)
{
/*
* stderr data is just spouted to local stderr (optionally via a
* sanitiser) and otherwise ignored.
*/
if (is_stderr) {
put_data(stderr_bs, data, len);
return 0;
}
bufchain_add(&received_data, data, len);
return 0;
}
static bool pscp_eof(Seat *seat)
{
/*
* We usually expect to be the party deciding when to close the
* connection, so if we see EOF before we sent it ourselves, we
* should panic. The exception is if we're using old-style scp and
* downloading rather than uploading.
*/
if ((using_sftp || uploading) && !sent_eof) {
seat_connection_fatal(
pscp_seat, "Received unexpected end-of-file from server");
}
return false;
}
static bool ssh_scp_recv(void *vbuf, size_t len)
{
char *buf = (char *)vbuf;
while (len > 0) {
while (bufchain_size(&received_data) == 0) {
if (backend_exitcode(backend) >= 0 ||
ssh_sftp_loop_iteration() < 0)
return false; /* doom */
}
size_t got = bufchain_fetch_consume_up_to(&received_data, buf, len);
buf += got;
len -= got;
}
return true;
}
/*
* Loop through the ssh connection and authentication process.
*/
static void ssh_scp_init(void)
{
while (!backend_sendok(backend)) {
if (backend_exitcode(backend) >= 0) {
errs++;
return;
}
if (ssh_sftp_loop_iteration() < 0) {
errs++;
return; /* doom */
}
}
/* Work out which backend we ended up using. */
if (!ssh_fallback_cmd(backend))
using_sftp = main_cmd_is_sftp;
else
using_sftp = fallback_cmd_is_sftp;
if (verbose) {
if (using_sftp)
tell_user(stderr, "Using SFTP");
else
tell_user(stderr, "Using SCP1");
}
}
/*
* Print an error message and exit after closing the SSH link.
*/
static NORETURN PRINTF_LIKE(1, 2) void bump(const char *fmt, ...)
{
char *str, *str2;
va_list ap;
va_start(ap, fmt);
str = dupvprintf(fmt, ap);
va_end(ap);
str2 = dupcat(str, "\n");
sfree(str);
abandon_stats();
tell_str(stderr, str2);
sfree(str2);
errs++;
if (backend && backend_connected(backend)) {
char ch;
backend_special(backend, SS_EOF, 0);
sent_eof = true;
ssh_scp_recv(&ch, 1);
}
cleanup_exit(1);
}
/*
* A nasty loop macro that lets me get an escape-sequence sanitised
* version of a string for display, and free it automatically
* afterwards.
*/
static StripCtrlChars *string_scc;
#define with_stripctrl(varname, input) \
for (char *varname = stripctrl_string(string_scc, input); varname; \
sfree(varname), varname = NULL)
/*
* Wait for the reply to a single SFTP request. Parallels the same
* function in psftp.c (but isn't centralised into sftp.c because the
* latter module handles SFTP only and shouldn't assume that SFTP is
* the only thing going on by calling seat_connection_fatal).
*/
struct sftp_packet *sftp_wait_for_reply(struct sftp_request *req)
{
struct sftp_packet *pktin;
struct sftp_request *rreq;
sftp_register(req);
pktin = sftp_recv();
if (pktin == NULL) {
seat_connection_fatal(
pscp_seat, "did not receive SFTP response packet from server");
}
rreq = sftp_find_request(pktin);
if (rreq != req) {
seat_connection_fatal(
pscp_seat,
"unable to understand SFTP response packet from server: %s",
fxp_error());
}
return pktin;
}
/*
* Open an SSH connection to user@host and execute cmd.
*/
static void do_cmd(char *host, char *user, char *cmd)
{
const char *err;
char *realhost;
LogContext *logctx;
if (host == NULL || host[0] == '\0')
bump("Empty host name");
/*
* Remove a colon suffix.
*/
host[host_strcspn(host, ":")] = '\0';
/*
* If we haven't loaded session details already (e.g., from -load),
* try looking for a session called "host".
*/
if (!cmdline_loaded_session()) {
/* Try to load settings for `host' into a temporary config */
Conf *conf2 = conf_new();
conf_set_str(conf2, CONF_host, "");
do_defaults(host, conf2);
if (conf_get_str(conf2, CONF_host)[0] != '\0') {
/* Settings present and include hostname */
/* Re-load data into the real config. */
do_defaults(host, conf);
} else {
/* Session doesn't exist or mention a hostname. */
/* Use `host' as a bare hostname. */
conf_set_str(conf, CONF_host, host);
}
conf_free(conf2);
} else {
/* Patch in hostname `host' to session details. */
conf_set_str(conf, CONF_host, host);
}
/*
* Force protocol to SSH if the user has somehow contrived to
* select one we don't support (e.g. by loading an inappropriate
* saved session). In that situation we assume the port number is
* useless too.)
*/
if (!backend_vt_from_proto(conf_get_int(conf, CONF_protocol))) {
conf_set_int(conf, CONF_protocol, PROT_SSH);
conf_set_int(conf, CONF_port, 22);
}
/*
* Enact command-line overrides.
*/
cmdline_run_saved(conf);
/*
* Muck about with the hostname in various ways.
*/
{
char *hostbuf = dupstr(conf_get_str(conf, CONF_host));
char *host = hostbuf;
char *p, *q;
/*
* Trim leading whitespace.
*/
host += strspn(host, " \t");
/*
* See if host is of the form user@host, and separate out
* the username if so.
*/
if (host[0] != '\0') {
char *atsign = strrchr(host, '@');
if (atsign) {
*atsign = '\0';
conf_set_str(conf, CONF_username, host);
host = atsign + 1;
}
}
/*
* Remove any remaining whitespace.
*/
p = hostbuf;
q = host;
while (*q) {
if (*q != ' ' && *q != '\t')
*p++ = *q;
q++;
}
*p = '\0';
conf_set_str(conf, CONF_host, hostbuf);
sfree(hostbuf);
}
/* Set username */
if (user != NULL && user[0] != '\0') {
conf_set_str(conf, CONF_username, user);
} else if (conf_get_str(conf, CONF_username)[0] == '\0') {
user = get_username();
if (!user)
bump("Empty user name");
else {
if (verbose)
tell_user(stderr, "Guessing user name: %s", user);
conf_set_str(conf, CONF_username, user);
sfree(user);
}
}
/*
* Force protocol to SSH if the user has somehow contrived to
* select one we don't support (e.g. by loading an inappropriate
* saved session). In that situation we assume the port number is
* useless too.)
*/
if (!backend_vt_from_proto(conf_get_int(conf, CONF_protocol))) {
conf_set_int(conf, CONF_protocol, PROT_SSH);
conf_set_int(conf, CONF_port, 22);
}
/*
* Disable scary things which shouldn't be enabled for simple
* things like SCP and SFTP: agent forwarding, port forwarding,
* X forwarding.
*/
conf_set_bool(conf, CONF_x11_forward, false);
conf_set_bool(conf, CONF_agentfwd, false);
conf_set_bool(conf, CONF_ssh_simple, true);
{
char *key;
while ((key = conf_get_str_nthstrkey(conf, CONF_portfwd, 0)) != NULL)
conf_del_str_str(conf, CONF_portfwd, key);
}
/*
* Set up main and possibly fallback command depending on
* options specified by user.
* Attempt to start the SFTP subsystem as a first choice,
* falling back to the provided scp command if that fails.
*/
conf_set_str(conf, CONF_remote_cmd2, "");
if (try_sftp) {
/* First choice is SFTP subsystem. */
main_cmd_is_sftp = true;
conf_set_str(conf, CONF_remote_cmd, "sftp");
conf_set_bool(conf, CONF_ssh_subsys, true);
if (try_scp) {
/* Fallback is to use the provided scp command. */
fallback_cmd_is_sftp = false;
conf_set_str(conf, CONF_remote_cmd2, cmd);
conf_set_bool(conf, CONF_ssh_subsys2, false);
} else {
/* Since we're not going to try SCP, we may as well try
* harder to find an SFTP server, since in the current
* implementation we have a spare slot. */
fallback_cmd_is_sftp = true;
/* see psftp.c for full explanation of this kludge */
conf_set_str(conf, CONF_remote_cmd2,
"test -x /usr/lib/sftp-server &&"
" exec /usr/lib/sftp-server\n"
"test -x /usr/local/lib/sftp-server &&"
" exec /usr/local/lib/sftp-server\n"
"exec sftp-server");
conf_set_bool(conf, CONF_ssh_subsys2, false);
}
} else {
/* Don't try SFTP at all; just try the scp command. */
main_cmd_is_sftp = false;
conf_set_str(conf, CONF_remote_cmd, cmd);
conf_set_bool(conf, CONF_ssh_subsys, false);
}
conf_set_bool(conf, CONF_nopty, true);
logctx = log_init(console_cli_logpolicy, conf);
platform_psftp_pre_conn_setup(console_cli_logpolicy);
err = backend_init(backend_vt_from_proto(
conf_get_int(conf, CONF_protocol)),
pscp_seat, &backend, logctx, conf,
conf_get_str(conf, CONF_host),
conf_get_int(conf, CONF_port),
&realhost, 0,
conf_get_bool(conf, CONF_tcp_keepalives));
if (err != NULL)
bump("ssh_init: %s", err);
ssh_scp_init();
if (verbose && realhost != NULL && errs == 0)
tell_user(stderr, "Connected to %s", realhost);
sfree(realhost);
}
/*
* Update statistic information about current file.
*/
static void print_stats(const char *name, uint64_t size, uint64_t done,
time_t start, time_t now)
{
float ratebs;
unsigned long eta;
char *etastr;
int pct;
int len;
int elap;
elap = (unsigned long) difftime(now, start);
if (now > start)
ratebs = (float)done / elap;
else
ratebs = (float)done;
if (ratebs < 1.0)
eta = size - done;
else
eta = (unsigned long)((size - done) / ratebs);
etastr = dupprintf("%02ld:%02ld:%02ld",
eta / 3600, (eta % 3600) / 60, eta % 60);
pct = (int) (100.0 * done / size);
{
/* divide by 1024 to provide kB */
len = printf("\r%-25.25s | %"PRIu64" kB | %5.1f kB/s | "
"ETA: %8s | %3d%%", name, done >> 10,
ratebs / 1024.0, etastr, pct);
if (len < prev_stats_len)
printf("%*s", prev_stats_len - len, "");
prev_stats_len = len;
if (done == size)
abandon_stats();
fflush(stdout);
}
free(etastr);
}
/*
* Find a colon in str and return a pointer to the colon.
* This is used to separate hostname from filename.
*/
static char *colon(char *str)
{
/* We ignore a leading colon, since the hostname cannot be
empty. We also ignore a colon as second character because
of filenames like f:myfile.txt. */
if (str[0] == '\0' || str[0] == ':' ||
(str[0] != '[' && str[1] == ':'))
return (NULL);
str += host_strcspn(str, ":/\\");
if (*str == ':')
return (str);
else
return (NULL);
}
/*
* Determine whether a string is entirely composed of dots.
*/
static bool is_dots(char *str)
{
return str[strspn(str, ".")] == '\0';
}
/*
* Wait for a response from the other side.
* Return 0 if ok, -1 if error.
*/
static int response(void)
{
char ch, resp, rbuf[2048];
int p;
if (!ssh_scp_recv(&resp, 1))
bump("Lost connection");
p = 0;
switch (resp) {
case 0: /* ok */
return (0);
default:
rbuf[p++] = resp;
/* fallthrough */
case 1: /* error */
case 2: /* fatal error */
do {
if (!ssh_scp_recv(&ch, 1))
bump("Protocol error: Lost connection");
rbuf[p++] = ch;
} while (p < sizeof(rbuf) && ch != '\n');
rbuf[p - 1] = '\0';
if (resp == 1)
tell_user(stderr, "%s", rbuf);
else
bump("%s", rbuf);
errs++;
return (-1);
}
}
bool sftp_recvdata(char *buf, size_t len)
{
return ssh_scp_recv(buf, len);
}
bool sftp_senddata(const char *buf, size_t len)
{
backend_send(backend, buf, len);
return true;
}
size_t sftp_sendbuffer(void)
{
return backend_sendbuffer(backend);
}
/* ----------------------------------------------------------------------
* sftp-based replacement for the hacky `pscp -ls'.
*/
void list_directory_from_sftp_warn_unsorted(void)
{
fprintf(stderr,
"Directory is too large to sort; writing file names unsorted\n");
}
void list_directory_from_sftp_print(struct fxp_name *name)
{
with_stripctrl(san, name->longname)
printf("%s\n", san);
}
void scp_sftp_listdir(const char *dirname)
{
struct fxp_handle *dirh;
struct fxp_names *names;
struct sftp_packet *pktin;
struct sftp_request *req;
if (!fxp_init()) {
tell_user(stderr, "unable to initialise SFTP: %s", fxp_error());
errs++;
return;
}
printf("Listing directory %s\n", dirname);
req = fxp_opendir_send(dirname);
pktin = sftp_wait_for_reply(req);
dirh = fxp_opendir_recv(pktin, req);
if (dirh == NULL) {
tell_user(stderr, "Unable to open %s: %s\n", dirname, fxp_error());
errs++;
} else {
struct list_directory_from_sftp_ctx *ctx =
list_directory_from_sftp_new();
while (1) {
req = fxp_readdir_send(dirh);
pktin = sftp_wait_for_reply(req);
names = fxp_readdir_recv(pktin, req);
if (names == NULL) {
if (fxp_error_type() == SSH_FX_EOF)
break;
printf("Reading directory %s: %s\n", dirname, fxp_error());
break;
}
if (names->nnames == 0) {
fxp_free_names(names);
break;
}
for (size_t i = 0; i < names->nnames; i++)
list_directory_from_sftp_feed(ctx, &names->names[i]);
fxp_free_names(names);
}
req = fxp_close_send(dirh);
pktin = sftp_wait_for_reply(req);
fxp_close_recv(pktin, req);
list_directory_from_sftp_finish(ctx);
list_directory_from_sftp_free(ctx);
}
}
/* ----------------------------------------------------------------------
* Helper routines that contain the actual SCP protocol elements,
* implemented both as SCP1 and SFTP.
*/
static struct scp_sftp_dirstack {
struct scp_sftp_dirstack *next;
struct fxp_name *names;
int namepos, namelen;
char *dirpath;
char *wildcard;
bool matched_something; /* wildcard match set was non-empty */
} *scp_sftp_dirstack_head;
static char *scp_sftp_remotepath, *scp_sftp_currentname;
static char *scp_sftp_wildcard;
static bool scp_sftp_targetisdir, scp_sftp_donethistarget;
static bool scp_sftp_preserve, scp_sftp_recursive;
static unsigned long scp_sftp_mtime, scp_sftp_atime;
static bool scp_has_times;
static struct fxp_handle *scp_sftp_filehandle;
static struct fxp_xfer *scp_sftp_xfer;
static uint64_t scp_sftp_fileoffset;
int scp_source_setup(const char *target, bool shouldbedir)
{
if (using_sftp) {
/*
* Find out whether the target filespec is in fact a
* directory.
*/
struct sftp_packet *pktin;
struct sftp_request *req;
struct fxp_attrs attrs;
bool ret;
if (!fxp_init()) {
tell_user(stderr, "unable to initialise SFTP: %s", fxp_error());
errs++;
return 1;
}
req = fxp_stat_send(target);
pktin = sftp_wait_for_reply(req);
ret = fxp_stat_recv(pktin, req, &attrs);
if (!ret || !(attrs.flags & SSH_FILEXFER_ATTR_PERMISSIONS))
scp_sftp_targetisdir = false;
else
scp_sftp_targetisdir = (attrs.permissions & 0040000) != 0;
if (shouldbedir && !scp_sftp_targetisdir) {
bump("pscp: remote filespec %s: not a directory\n", target);
}
scp_sftp_remotepath = dupstr(target);
scp_has_times = false;
} else {
(void) response();
}
return 0;
}
int scp_send_errmsg(char *str)
{
if (using_sftp) {
/* do nothing; we never need to send our errors to the server */
} else {
backend_send(backend, "\001", 1);/* scp protocol error prefix */
backend_send(backend, str, strlen(str));
}
return 0; /* can't fail */
}
int scp_send_filetimes(unsigned long mtime, unsigned long atime)
{
if (using_sftp) {
scp_sftp_mtime = mtime;
scp_sftp_atime = atime;
scp_has_times = true;
return 0;
} else {
char buf[80];
sprintf(buf, "T%lu 0 %lu 0\n", mtime, atime);
backend_send(backend, buf, strlen(buf));
return response();
}
}
int scp_send_filename(const char *name, uint64_t size, int permissions)
{
if (using_sftp) {
char *fullname;
struct sftp_packet *pktin;
struct sftp_request *req;
struct fxp_attrs attrs;
if (scp_sftp_targetisdir) {
fullname = dupcat(scp_sftp_remotepath, "/", name);
} else {
fullname = dupstr(scp_sftp_remotepath);
}
attrs.flags = 0;
PUT_PERMISSIONS(attrs, permissions);
req = fxp_open_send(fullname,
SSH_FXF_WRITE | SSH_FXF_CREAT | SSH_FXF_TRUNC,
&attrs);
pktin = sftp_wait_for_reply(req);
scp_sftp_filehandle = fxp_open_recv(pktin, req);
if (!scp_sftp_filehandle) {
tell_user(stderr, "pscp: unable to open %s: %s",
fullname, fxp_error());
sfree(fullname);
errs++;
return 1;
}
scp_sftp_fileoffset = 0;
scp_sftp_xfer = xfer_upload_init(scp_sftp_filehandle,
scp_sftp_fileoffset);
sfree(fullname);
return 0;
} else {
char *buf;
if (permissions < 0)
permissions = 0644;
buf = dupprintf("C%04o %"PRIu64" ", (int)(permissions & 07777), size);
backend_send(backend, buf, strlen(buf));
sfree(buf);
backend_send(backend, name, strlen(name));
backend_send(backend, "\n", 1);
return response();
}
}
int scp_send_filedata(char *data, int len)
{
if (using_sftp) {
int ret;
struct sftp_packet *pktin;
if (!scp_sftp_filehandle) {
return 1;
}
while (!xfer_upload_ready(scp_sftp_xfer)) {
if (toplevel_callback_pending()) {
/* If we have pending callbacks, they might make
* xfer_upload_ready start to return true. So we should
* run them and then re-check xfer_upload_ready, before
* we go as far as waiting for an entire packet to
* arrive. */
run_toplevel_callbacks();
continue;
}
pktin = sftp_recv();
ret = xfer_upload_gotpkt(scp_sftp_xfer, pktin);
if (ret <= 0) {
tell_user(stderr, "error while writing: %s", fxp_error());
if (ret == INT_MIN) /* pktin not even freed */
sfree(pktin);
errs++;
return 1;
}
}
xfer_upload_data(scp_sftp_xfer, data, len);
scp_sftp_fileoffset += len;
return 0;
} else {
int bufsize = backend_send(backend, data, len);
/*
* If the network transfer is backing up - that is, the
* remote site is not accepting data as fast as we can
* produce it - then we must loop on network events until
* we have space in the buffer again.
*/
while (bufsize > MAX_SCP_BUFSIZE) {
if (ssh_sftp_loop_iteration() < 0)
return 1;
bufsize = backend_sendbuffer(backend);
}
return 0;
}
}
int scp_send_finish(void)
{
if (using_sftp) {
struct fxp_attrs attrs;
struct sftp_packet *pktin;
struct sftp_request *req;
while (!xfer_done(scp_sftp_xfer)) {
pktin = sftp_recv();
int ret = xfer_upload_gotpkt(scp_sftp_xfer, pktin);
if (ret <= 0) {
tell_user(stderr, "error while writing: %s", fxp_error());
if (ret == INT_MIN) /* pktin not even freed */
sfree(pktin);
errs++;
return 1;
}
}
xfer_cleanup(scp_sftp_xfer);
if (!scp_sftp_filehandle) {
return 1;
}
if (scp_has_times) {
attrs.flags = SSH_FILEXFER_ATTR_ACMODTIME;
attrs.atime = scp_sftp_atime;
attrs.mtime = scp_sftp_mtime;
req = fxp_fsetstat_send(scp_sftp_filehandle, attrs);
pktin = sftp_wait_for_reply(req);
bool ret = fxp_fsetstat_recv(pktin, req);
if (!ret) {
tell_user(stderr, "unable to set file times: %s", fxp_error());
errs++;
}
}
req = fxp_close_send(scp_sftp_filehandle);
pktin = sftp_wait_for_reply(req);
fxp_close_recv(pktin, req);
scp_has_times = false;
return 0;
} else {
backend_send(backend, "", 1);
return response();
}
}
char *scp_save_remotepath(void)
{
if (using_sftp)
return scp_sftp_remotepath;
else
return NULL;
}
void scp_restore_remotepath(char *data)
{
if (using_sftp)
scp_sftp_remotepath = data;
}
int scp_send_dirname(const char *name, int modes)
{
if (using_sftp) {
char *fullname;
char const *err;
struct fxp_attrs attrs;
struct sftp_packet *pktin;
struct sftp_request *req;
bool ret;
if (scp_sftp_targetisdir) {
fullname = dupcat(scp_sftp_remotepath, "/", name);
} else {
fullname = dupstr(scp_sftp_remotepath);
}
/*
* We don't worry about whether we managed to create the
* directory, because if it exists already it's OK just to
* use it. Instead, we will stat it afterwards, and if it
* exists and is a directory we will assume we were either
* successful or it didn't matter.
*/
req = fxp_mkdir_send(fullname, NULL);
pktin = sftp_wait_for_reply(req);
ret = fxp_mkdir_recv(pktin, req);
if (!ret)
err = fxp_error();
else
err = "server reported no error";
req = fxp_stat_send(fullname);
pktin = sftp_wait_for_reply(req);
ret = fxp_stat_recv(pktin, req, &attrs);
if (!ret || !(attrs.flags & SSH_FILEXFER_ATTR_PERMISSIONS) ||
!(attrs.permissions & 0040000)) {
tell_user(stderr, "unable to create directory %s: %s",
fullname, err);
sfree(fullname);
errs++;
return 1;
}
scp_sftp_remotepath = fullname;
return 0;
} else {
char buf[40];
sprintf(buf, "D%04o 0 ", modes);
backend_send(backend, buf, strlen(buf));
backend_send(backend, name, strlen(name));
backend_send(backend, "\n", 1);
return response();
}
}
int scp_send_enddir(void)
{
if (using_sftp) {
sfree(scp_sftp_remotepath);
return 0;
} else {
backend_send(backend, "E\n", 2);
return response();
}
}
/*
* Yes, I know; I have an scp_sink_setup _and_ an scp_sink_init.
* That's bad. The difference is that scp_sink_setup is called once
* right at the start, whereas scp_sink_init is called to
* initialise every level of recursion in the protocol.
*/
int scp_sink_setup(const char *source, bool preserve, bool recursive)
{
if (using_sftp) {
char *newsource;
if (!fxp_init()) {
tell_user(stderr, "unable to initialise SFTP: %s", fxp_error());
errs++;
return 1;
}
/*
* It's possible that the source string we've been given
* contains a wildcard. If so, we must split the directory
* away from the wildcard itself (throwing an error if any
* wildcardness comes before the final slash) and arrange
* things so that a dirstack entry will be set up.
*/
newsource = snewn(1+strlen(source), char);
if (!wc_unescape(newsource, source)) {
/* Yes, here we go; it's a wildcard. Bah. */
char *dupsource, *lastpart, *dirpart, *wildcard;
sfree(newsource);
dupsource = dupstr(source);
lastpart = stripslashes(dupsource, false);
wildcard = dupstr(lastpart);
*lastpart = '\0';
if (*dupsource && dupsource[1]) {
/*
* The remains of dupsource are at least two
* characters long, meaning the pathname wasn't
* empty or just `/'. Hence, we remove the trailing
* slash.
*/
lastpart[-1] = '\0';
} else if (!*dupsource) {
/*
* The remains of dupsource are _empty_ - the whole
* pathname was a wildcard. Hence we need to
* replace it with ".".
*/
sfree(dupsource);
dupsource = dupstr(".");
}
/*
* Now we have separated our string into dupsource (the
* directory part) and wildcard. Both of these will
* need freeing at some point. Next step is to remove
* wildcard escapes from the directory part, throwing
* an error if it contains a real wildcard.
*/
dirpart = snewn(1+strlen(dupsource), char);
if (!wc_unescape(dirpart, dupsource)) {
tell_user(stderr, "%s: multiple-level wildcards unsupported",
source);
errs++;
sfree(dirpart);
sfree(wildcard);
sfree(dupsource);
return 1;
}
/*
* Now we have dirpart (unescaped, ie a valid remote
* path), and wildcard (a wildcard). This will be
* sufficient to arrange a dirstack entry.
*/
scp_sftp_remotepath = dirpart;
scp_sftp_wildcard = wildcard;
sfree(dupsource);
} else {
scp_sftp_remotepath = newsource;
scp_sftp_wildcard = NULL;
}
scp_sftp_preserve = preserve;
scp_sftp_recursive = recursive;
scp_sftp_donethistarget = false;
scp_sftp_dirstack_head = NULL;
}
return 0;
}
int scp_sink_init(void)
{
if (!using_sftp) {
backend_send(backend, "", 1);
}
return 0;
}
#define SCP_SINK_FILE 1
#define SCP_SINK_DIR 2
#define SCP_SINK_ENDDIR 3
#define SCP_SINK_RETRY 4 /* not an action; just try again */
struct scp_sink_action {
int action; /* FILE, DIR, ENDDIR */
strbuf *buf; /* will need freeing after use */
char *name; /* filename or dirname (not ENDDIR) */
long permissions; /* access permissions (not ENDDIR) */
uint64_t size; /* file size (not ENDDIR) */
bool settime; /* true if atime and mtime are filled */
unsigned long atime, mtime; /* access times for the file */
};
int scp_get_sink_action(struct scp_sink_action *act)
{
if (using_sftp) {
char *fname;
bool must_free_fname;
struct fxp_attrs attrs;
struct sftp_packet *pktin;
struct sftp_request *req;
bool ret;
if (!scp_sftp_dirstack_head) {
if (!scp_sftp_donethistarget) {
/*
* Simple case: we are only dealing with one file.
*/
fname = scp_sftp_remotepath;
must_free_fname = false;
scp_sftp_donethistarget = true;
} else {
/*
* Even simpler case: one file _which we've done_.
* Return 1 (finished).
*/
return 1;
}
} else {
/*
* We're now in the middle of stepping through a list
* of names returned from fxp_readdir(); so let's carry
* on.
*/
struct scp_sftp_dirstack *head = scp_sftp_dirstack_head;
while (head->namepos < head->namelen &&
(is_dots(head->names[head->namepos].filename) ||
(head->wildcard &&
!wc_match(head->wildcard,
head->names[head->namepos].filename))))
head->namepos++; /* skip . and .. */
if (head->namepos < head->namelen) {
head->matched_something = true;
fname = dupcat(head->dirpath, "/",
head->names[head->namepos++].filename);
must_free_fname = true;
} else {
/*
* We've come to the end of the list; pop it off
* the stack and return an ENDDIR action (or RETRY
* if this was a wildcard match).
*/
if (head->wildcard) {
act->action = SCP_SINK_RETRY;
if (!head->matched_something) {
tell_user(stderr, "pscp: wildcard '%s' matched "
"no files", head->wildcard);
errs++;
}
sfree(head->wildcard);
} else {
act->action = SCP_SINK_ENDDIR;
}
sfree(head->dirpath);
sfree(head->names);
scp_sftp_dirstack_head = head->next;
sfree(head);
return 0;
}
}
/*
* Now we have a filename. Stat it, and see if it's a file
* or a directory.
*/
req = fxp_stat_send(fname);
pktin = sftp_wait_for_reply(req);
ret = fxp_stat_recv(pktin, req, &attrs);
if (!ret || !(attrs.flags & SSH_FILEXFER_ATTR_PERMISSIONS)) {
with_stripctrl(san, fname)
tell_user(stderr, "unable to identify %s: %s", san,
ret ? "file type not supplied" : fxp_error());
if (must_free_fname) sfree(fname);
errs++;
return 1;
}
if (attrs.permissions & 0040000) {
struct scp_sftp_dirstack *newitem;
struct fxp_handle *dirhandle;
size_t nnames, namesize;
struct fxp_name *ournames;
struct fxp_names *names;
/*
* It's a directory. If we're not in recursive mode,
* this merits a complaint (which is fatal if the name
* was specified directly, but not if it was matched by
* a wildcard).
*
* We skip this complaint completely if
* scp_sftp_wildcard is set, because that's an
* indication that we're not actually supposed to
* _recursively_ transfer the dir, just scan it for
* things matching the wildcard.
*/
if (!scp_sftp_recursive && !scp_sftp_wildcard) {
with_stripctrl(san, fname)
tell_user(stderr, "pscp: %s: is a directory", san);
errs++;
if (must_free_fname) sfree(fname);
if (scp_sftp_dirstack_head) {
act->action = SCP_SINK_RETRY;
return 0;
} else {
return 1;
}
}
/*
* Otherwise, the fun begins. We must fxp_opendir() the
* directory, slurp the filenames into memory, return
* SCP_SINK_DIR (unless this is a wildcard match), and
* set targetisdir. The next time we're called, we will
* run through the list of filenames one by one,
* matching them against a wildcard if present.
*
* If targetisdir is _already_ set (meaning we're
* already in the middle of going through another such
* list), we must push the other (target,namelist) pair
* on a stack.
*/
req = fxp_opendir_send(fname);
pktin = sftp_wait_for_reply(req);
dirhandle = fxp_opendir_recv(pktin, req);
if (!dirhandle) {
with_stripctrl(san, fname)
tell_user(stderr, "pscp: unable to open directory %s: %s",
san, fxp_error());
if (must_free_fname) sfree(fname);
errs++;
return 1;
}
nnames = namesize = 0;
ournames = NULL;
while (1) {
int i;
req = fxp_readdir_send(dirhandle);
pktin = sftp_wait_for_reply(req);
names = fxp_readdir_recv(pktin, req);
if (names == NULL) {
if (fxp_error_type() == SSH_FX_EOF)
break;
with_stripctrl(san, fname)
tell_user(stderr, "pscp: reading directory %s: %s",
san, fxp_error());
req = fxp_close_send(dirhandle);
pktin = sftp_wait_for_reply(req);
fxp_close_recv(pktin, req);
if (must_free_fname) sfree(fname);
sfree(ournames);
errs++;
return 1;
}
if (names->nnames == 0) {
fxp_free_names(names);
break;
}
sgrowarrayn(ournames, namesize, nnames, names->nnames);
for (i = 0; i < names->nnames; i++) {
if (!strcmp(names->names[i].filename, ".") ||
!strcmp(names->names[i].filename, "..")) {
/*
* . and .. are normal consequences of
* reading a directory, and aren't worth
* complaining about.
*/
} else if (!vet_filename(names->names[i].filename)) {
with_stripctrl(san, names->names[i].filename)
tell_user(stderr, "ignoring potentially dangerous "
"server-supplied filename '%s'", san);
} else
ournames[nnames++] = names->names[i];
}
names->nnames = 0; /* prevent free_names */
fxp_free_names(names);
}
req = fxp_close_send(dirhandle);
pktin = sftp_wait_for_reply(req);
fxp_close_recv(pktin, req);
newitem = snew(struct scp_sftp_dirstack);
newitem->next = scp_sftp_dirstack_head;
newitem->names = ournames;
newitem->namepos = 0;
newitem->namelen = nnames;
if (must_free_fname)
newitem->dirpath = fname;
else
newitem->dirpath = dupstr(fname);
if (scp_sftp_wildcard) {
newitem->wildcard = scp_sftp_wildcard;
newitem->matched_something = false;
scp_sftp_wildcard = NULL;
} else {
newitem->wildcard = NULL;
}
scp_sftp_dirstack_head = newitem;
if (newitem->wildcard) {
act->action = SCP_SINK_RETRY;
} else {
act->action = SCP_SINK_DIR;
strbuf_clear(act->buf);
put_asciz(act->buf, stripslashes(fname, false));
act->name = act->buf->s;
act->size = 0; /* duhh, it's a directory */
act->permissions = 07777 & attrs.permissions;
if (scp_sftp_preserve &&
(attrs.flags & SSH_FILEXFER_ATTR_ACMODTIME)) {
act->atime = attrs.atime;
act->mtime = attrs.mtime;
act->settime = true;
} else
act->settime = false;
}
return 0;
} else {
/*
* It's a file. Return SCP_SINK_FILE.
*/
act->action = SCP_SINK_FILE;
strbuf_clear(act->buf);
put_asciz(act->buf, stripslashes(fname, false));
act->name = act->buf->s;
if (attrs.flags & SSH_FILEXFER_ATTR_SIZE) {
act->size = attrs.size;
} else
act->size = UINT64_MAX; /* no idea */
act->permissions = 07777 & attrs.permissions;
if (scp_sftp_preserve &&
(attrs.flags & SSH_FILEXFER_ATTR_ACMODTIME)) {
act->atime = attrs.atime;
act->mtime = attrs.mtime;
act->settime = true;
} else
act->settime = false;
if (must_free_fname)
scp_sftp_currentname = fname;
else
scp_sftp_currentname = dupstr(fname);
return 0;
}
} else {
bool done = false;
int action;
char ch;
act->settime = false;
strbuf_clear(act->buf);
while (!done) {
if (!ssh_scp_recv(&ch, 1))
return 1;
if (ch == '\n')
bump("Protocol error: Unexpected newline");
action = ch;
while (1) {
if (!ssh_scp_recv(&ch, 1))
bump("Lost connection");
if (ch == '\n')
break;
put_byte(act->buf, ch);
}
switch (action) {
case '\01': /* error */
with_stripctrl(san, act->buf->s)
tell_user(stderr, "%s", san);
errs++;
continue; /* go round again */
case '\02': /* fatal error */
with_stripctrl(san, act->buf->s)
bump("%s", san);
case 'E':
backend_send(backend, "", 1);
act->action = SCP_SINK_ENDDIR;
return 0;
case 'T':
if (sscanf(act->buf->s, "%lu %*d %lu %*d",
&act->mtime, &act->atime) == 2) {
act->settime = true;
backend_send(backend, "", 1);
strbuf_clear(act->buf);
continue; /* go round again */
}
bump("Protocol error: Illegal time format");
case 'C':
case 'D':
act->action = (action == 'C' ? SCP_SINK_FILE : SCP_SINK_DIR);
if (act->action == SCP_SINK_DIR && !recursive) {
bump("security violation: remote host attempted to create "
"a subdirectory in a non-recursive copy!");
}
break;
default:
bump("Protocol error: Expected control record");
}
/*
* We will go round this loop only once, unless we hit
* `continue' above.
*/
done = true;
}
/*
* If we get here, we must have seen SCP_SINK_FILE or
* SCP_SINK_DIR.
*/
{
int i;
if (sscanf(act->buf->s, "%lo %"SCNu64" %n", &act->permissions,
&act->size, &i) != 2)
bump("Protocol error: Illegal file descriptor format");
act->name = act->buf->s + i;
return 0;
}
}
}
int scp_accept_filexfer(void)
{
if (using_sftp) {
struct sftp_packet *pktin;
struct sftp_request *req;
req = fxp_open_send(scp_sftp_currentname, SSH_FXF_READ, NULL);
pktin = sftp_wait_for_reply(req);
scp_sftp_filehandle = fxp_open_recv(pktin, req);
if (!scp_sftp_filehandle) {
with_stripctrl(san, scp_sftp_currentname)
tell_user(stderr, "pscp: unable to open %s: %s",
san, fxp_error());
errs++;
return 1;
}
scp_sftp_fileoffset = 0;
scp_sftp_xfer = xfer_download_init(scp_sftp_filehandle,
scp_sftp_fileoffset);
sfree(scp_sftp_currentname);
return 0;
} else {
backend_send(backend, "", 1);
return 0; /* can't fail */
}
}
int scp_recv_filedata(char *data, int len)
{
if (using_sftp) {
struct sftp_packet *pktin;
int ret, actuallen;
void *vbuf;
xfer_download_queue(scp_sftp_xfer);
pktin = sftp_recv();
ret = xfer_download_gotpkt(scp_sftp_xfer, pktin);
if (ret <= 0) {
tell_user(stderr, "pscp: error while reading: %s", fxp_error());
if (ret == INT_MIN) /* pktin not even freed */
sfree(pktin);
errs++;
return -1;
}
if (xfer_download_data(scp_sftp_xfer, &vbuf, &actuallen)) {
if (actuallen <= 0) {
tell_user(stderr, "pscp: end of file while reading");
errs++;
sfree(vbuf);
return -1;
}
/*
* This assertion relies on the fact that the natural
* block size used in the xfer manager is at most that
* used in this module. I don't like crossing layers in
* this way, but it'll do for now.
*/
assert(actuallen <= len);
memcpy(data, vbuf, actuallen);
sfree(vbuf);
} else
actuallen = 0;
scp_sftp_fileoffset += actuallen;
return actuallen;
} else {
return ssh_scp_recv(data, len) ? len : 0;
}
}
int scp_finish_filerecv(void)
{
if (using_sftp) {
struct sftp_packet *pktin;
struct sftp_request *req;
/*
* Ensure that xfer_done() will work correctly, so we can
* clean up any outstanding requests from the file
* transfer.
*/
xfer_set_error(scp_sftp_xfer);
while (!xfer_done(scp_sftp_xfer)) {
void *vbuf;
int ret, len;
pktin = sftp_recv();
ret = xfer_download_gotpkt(scp_sftp_xfer, pktin);
if (ret <= 0) {
tell_user(stderr, "pscp: error while reading: %s", fxp_error());
if (ret == INT_MIN) /* pktin not even freed */
sfree(pktin);
errs++;
return -1;
}
if (xfer_download_data(scp_sftp_xfer, &vbuf, &len))
sfree(vbuf);
}
xfer_cleanup(scp_sftp_xfer);
req = fxp_close_send(scp_sftp_filehandle);
pktin = sftp_wait_for_reply(req);
fxp_close_recv(pktin, req);
return 0;
} else {
backend_send(backend, "", 1);
return response();
}
}
/* ----------------------------------------------------------------------
* Send an error message to the other side and to the screen.
* Increment error counter.
*/
static PRINTF_LIKE(1, 2) void run_err(const char *fmt, ...)
{
char *str, *str2;
va_list ap;
va_start(ap, fmt);
errs++;
str = dupvprintf(fmt, ap);
str2 = dupcat("pscp: ", str, "\n");
sfree(str);
scp_send_errmsg(str2);
abandon_stats();
tell_user(stderr, "%s", str2);
va_end(ap);
sfree(str2);
}
/*
* Execute the source part of the SCP protocol.
*/
static void source(const char *src)
{
uint64_t size;
unsigned long mtime, atime;
long permissions;
const char *last;
RFile *f;
int attr;
uint64_t i;
uint64_t stat_bytes;
time_t stat_starttime, stat_lasttime;
attr = file_type(src);
if (attr == FILE_TYPE_NONEXISTENT ||
attr == FILE_TYPE_WEIRD) {
run_err("%s: %s file or directory", src,
(attr == FILE_TYPE_WEIRD ? "Not a" : "No such"));
return;
}
if (attr == FILE_TYPE_DIRECTORY) {
if (recursive) {
/*
* Avoid . and .. directories.
*/
const char *p;
p = strrchr(src, '/');
if (!p)
p = strrchr(src, '\\');
if (!p)
p = src;
else
p++;
if (!strcmp(p, ".") || !strcmp(p, ".."))
/* skip . and .. */ ;
else
rsource(src);
} else {
run_err("%s: not a regular file", src);
}
return;
}
if ((last = strrchr(src, '/')) == NULL)
last = src;
else
last++;
if (strrchr(last, '\\') != NULL)
last = strrchr(last, '\\') + 1;
if (last == src && strchr(src, ':') != NULL)
last = strchr(src, ':') + 1;
f = open_existing_file(src, &size, &mtime, &atime, &permissions);
if (f == NULL) {
run_err("%s: Cannot open file", src);
return;
}
if (preserve) {
if (scp_send_filetimes(mtime, atime)) {
close_rfile(f);
return;
}
}
if (verbose) {
tell_user(stderr, "Sending file %s, size=%"PRIu64, last, size);
}
if (scp_send_filename(last, size, permissions)) {
close_rfile(f);
return;
}
stat_bytes = 0;
stat_starttime = time(NULL);
stat_lasttime = 0;
#define PSCP_SEND_BLOCK 4096
for (i = 0; i < size; i += PSCP_SEND_BLOCK) {
char transbuf[PSCP_SEND_BLOCK];
int j, k = PSCP_SEND_BLOCK;
if (i + k > size)
k = size - i;
if ((j = read_from_file(f, transbuf, k)) != k) {
bump("%s: Read error", src);
}
if (scp_send_filedata(transbuf, k))
bump("%s: Network error occurred", src);
if (statistics) {
stat_bytes += k;
if (time(NULL) != stat_lasttime || i + k == size) {
stat_lasttime = time(NULL);
print_stats(last, size, stat_bytes,
stat_starttime, stat_lasttime);
}
}
}
close_rfile(f);
(void) scp_send_finish();
}
/*
* Recursively send the contents of a directory.
*/
static void rsource(const char *src)
{
const char *last;
char *save_target;
DirHandle *dir;
if ((last = strrchr(src, '/')) == NULL)
last = src;
else
last++;
if (strrchr(last, '\\') != NULL)
last = strrchr(last, '\\') + 1;
if (last == src && strchr(src, ':') != NULL)
last = strchr(src, ':') + 1;
/* maybe send filetime */
save_target = scp_save_remotepath();
if (verbose)
tell_user(stderr, "Entering directory: %s", last);
if (scp_send_dirname(last, 0755))
return;
const char *opendir_err;
dir = open_directory(src, &opendir_err);
if (dir != NULL) {
char *filename;
while ((filename = read_filename(dir)) != NULL) {
char *foundfile = dupcat(src, "/", filename);
source(foundfile);
sfree(foundfile);
sfree(filename);
}
close_directory(dir);
} else {
tell_user(stderr, "Error opening directory %s: %s", src, opendir_err);
}
(void) scp_send_enddir();
scp_restore_remotepath(save_target);
}
/*
* Execute the sink part of the SCP protocol.
*/
static void sink(const char *targ, const char *src)
{
char *destfname;
bool targisdir = false;
bool exists;
int attr;
WFile *f;
uint64_t received;
bool wrerror = false;
uint64_t stat_bytes;
time_t stat_starttime, stat_lasttime;
char *stat_name;
attr = file_type(targ);
if (attr == FILE_TYPE_DIRECTORY)
targisdir = true;
if (targetshouldbedirectory && !targisdir)
bump("%s: Not a directory", targ);
scp_sink_init();
struct scp_sink_action act;
act.buf = strbuf_new();
while (1) {
if (scp_get_sink_action(&act))
goto out;
if (act.action == SCP_SINK_ENDDIR)
goto out;
if (act.action == SCP_SINK_RETRY)
continue;
if (targisdir) {
/*
* Prevent the remote side from maliciously writing to
* files outside the target area by sending a filename
* containing `../'. In fact, it shouldn't be sending
* filenames with any slashes or colons in at all; so
* we'll find the last slash, backslash or colon in the
* filename and use only the part after that. (And
* warn!)
*
* In addition, we also ensure here that if we're
* copying a single file and the target is a directory
* (common usage: `pscp host:filename .') the remote
* can't send us a _different_ file name. We can
* distinguish this case because `src' will be non-NULL
* and the last component of that will fail to match
* (the last component of) the name sent.
*
* Well, not always; if `src' is a wildcard, we do
* expect to get back filenames that don't correspond
* exactly to it. Ideally in this case, we would like
* to ensure that the returned filename actually
* matches the wildcard pattern - but one of SCP's
* protocol infelicities is that wildcard matching is
* done at the server end _by the server's rules_ and
* so in general this is infeasible. Hence, we only
* accept filenames that don't correspond to `src' if
* unsafe mode is enabled or we are using SFTP (which
* resolves remote wildcards on the client side and can
* be trusted).
*/
char *striptarget, *stripsrc;
striptarget = stripslashes(act.name, true);
if (striptarget != act.name) {
with_stripctrl(sanname, act.name) {
with_stripctrl(santarg, act.name) {
tell_user(stderr, "warning: remote host sent a"
" compound pathname '%s'", sanname);
tell_user(stderr, " renaming local"
" file to '%s'", santarg);
}
}
}
/*
* Also check to see if the target filename is '.' or
* '..', or indeed '...' and so on because Windows
* appears to interpret those like '..'.
*/
if (is_dots(striptarget)) {
bump("security violation: remote host attempted to write to"
" a '.' or '..' path!");
}
if (src) {
stripsrc = stripslashes(src, true);
if (strcmp(striptarget, stripsrc) &&
!using_sftp && !scp_unsafe_mode) {
with_stripctrl(san, striptarget)
tell_user(stderr, "warning: remote host tried to "
"write to a file called '%s'", san);
tell_user(stderr, " when we requested a file "
"called '%s'.", stripsrc);
tell_user(stderr, " If this is a wildcard, "
"consider upgrading to SSH-2 or using");
tell_user(stderr, " the '-unsafe' option. Renaming"
" of this file has been disallowed.");
/* Override the name the server provided with our own. */
striptarget = stripsrc;
}
}
if (targ[0] != '\0')
destfname = dir_file_cat(targ, striptarget);
else
destfname = dupstr(striptarget);
} else {
/*
* In this branch of the if, the target area is a
* single file with an explicitly specified name in any
* case, so there's no danger.
*/
destfname = dupstr(targ);
}
attr = file_type(destfname);
exists = (attr != FILE_TYPE_NONEXISTENT);
if (act.action == SCP_SINK_DIR) {
if (exists && attr != FILE_TYPE_DIRECTORY) {
with_stripctrl(san, destfname)
run_err("%s: Not a directory", san);
sfree(destfname);
continue;
}
if (!exists) {
if (!create_directory(destfname)) {
with_stripctrl(san, destfname)
run_err("%s: Cannot create directory", san);
sfree(destfname);
continue;
}
}
sink(destfname, NULL);
/* can we set the timestamp for directories ? */
sfree(destfname);
continue;
}
f = open_new_file(destfname, act.permissions);
if (f == NULL) {
with_stripctrl(san, destfname)
run_err("%s: Cannot create file", san);
sfree(destfname);
continue;
}
if (scp_accept_filexfer()) {
sfree(destfname);
close_wfile(f);
goto out;
}
stat_bytes = 0;
stat_starttime = time(NULL);
stat_lasttime = 0;
stat_name = stripctrl_string(
string_scc, stripslashes(destfname, true));
received = 0;
while (received < act.size) {
char transbuf[32768];
uint64_t blksize;
int read;
blksize = 32768;
if (blksize > act.size - received)
blksize = act.size - received;
read = scp_recv_filedata(transbuf, (int)blksize);
if (read <= 0)
bump("Lost connection");
if (wrerror) {
received += read;
continue;
}
if (write_to_file(f, transbuf, read) != (int)read) {
wrerror = true;
/* FIXME: in sftp we can actually abort the transfer */
if (statistics)
printf("\r%-25.25s | %50s\n",
stat_name,
"Write error.. waiting for end of file");
received += read;
continue;
}
if (statistics) {
stat_bytes += read;
if (time(NULL) > stat_lasttime ||
received + read == act.size) {
stat_lasttime = time(NULL);
print_stats(stat_name, act.size, stat_bytes,
stat_starttime, stat_lasttime);
}
}
received += read;
}
if (act.settime) {
set_file_times(f, act.mtime, act.atime);
}
close_wfile(f);
if (wrerror) {
with_stripctrl(san, destfname)
run_err("%s: Write error", san);
sfree(destfname);
continue;
}
(void) scp_finish_filerecv();
sfree(stat_name);
sfree(destfname);
}
out:
strbuf_free(act.buf);
}
/*
* We will copy local files to a remote server.
*/
static void toremote(int argc, char *argv[])
{
char *src, *wtarg, *host, *user;
const char *targ;
char *cmd;
int i, wc_type;
uploading = true;
wtarg = argv[argc - 1];
/* Separate host from filename */
host = wtarg;
wtarg = colon(wtarg);
if (wtarg == NULL)
bump("wtarg == NULL in toremote()");
*wtarg++ = '\0';
/* Substitute "." for empty target */
if (*wtarg == '\0')
targ = ".";
else
targ = wtarg;
/* Separate host and username */
user = host;
host = strrchr(host, '@');
if (host == NULL) {
host = user;
user = NULL;
} else {
*host++ = '\0';
if (*user == '\0')
user = NULL;
}
if (argc == 2) {
if (colon(argv[0]) != NULL)
bump("%s: Remote to remote not supported", argv[0]);
wc_type = test_wildcard(argv[0], true);
if (wc_type == WCTYPE_NONEXISTENT)
bump("%s: No such file or directory\n", argv[0]);
else if (wc_type == WCTYPE_WILDCARD)
targetshouldbedirectory = true;
}
cmd = dupprintf("scp%s%s%s%s -t %s",
verbose ? " -v" : "",
recursive ? " -r" : "",
preserve ? " -p" : "",
targetshouldbedirectory ? " -d" : "", targ);
do_cmd(host, user, cmd);
sfree(cmd);
if (scp_source_setup(targ, targetshouldbedirectory))
return;
for (i = 0; i < argc - 1; i++) {
src = argv[i];
if (colon(src) != NULL) {
tell_user(stderr, "%s: Remote to remote not supported\n", src);
errs++;
continue;
}
wc_type = test_wildcard(src, true);
if (wc_type == WCTYPE_NONEXISTENT) {
run_err("%s: No such file or directory", src);
continue;
} else if (wc_type == WCTYPE_FILENAME) {
source(src);
continue;
} else {
WildcardMatcher *wc;
char *filename;
wc = begin_wildcard_matching(src);
if (wc == NULL) {
run_err("%s: No such file or directory", src);
continue;
}
while ((filename = wildcard_get_filename(wc)) != NULL) {
source(filename);
sfree(filename);
}
finish_wildcard_matching(wc);
}
}
}
/*
* We will copy files from a remote server to the local machine.
*/
static void tolocal(int argc, char *argv[])
{
char *wsrc, *host, *user;
const char *src, *targ;
char *cmd;
uploading = false;
if (argc != 2)
bump("More than one remote source not supported");
wsrc = argv[0];
targ = argv[1];
/* Separate host from filename */
host = wsrc;
wsrc = colon(wsrc);
if (wsrc == NULL)
bump("Local to local copy not supported");
*wsrc++ = '\0';
/* Substitute "." for empty filename */
if (*wsrc == '\0')
src = ".";
else
src = wsrc;
/* Separate username and hostname */
user = host;
host = strrchr(host, '@');
if (host == NULL) {
host = user;
user = NULL;
} else {
*host++ = '\0';
if (*user == '\0')
user = NULL;
}
cmd = dupprintf("scp%s%s%s%s -f %s",
verbose ? " -v" : "",
recursive ? " -r" : "",
preserve ? " -p" : "",
targetshouldbedirectory ? " -d" : "", src);
do_cmd(host, user, cmd);
sfree(cmd);
if (scp_sink_setup(src, preserve, recursive))
return;
sink(targ, src);
}
/*
* We will issue a list command to get a remote directory.
*/
static void get_dir_list(int argc, char *argv[])
{
char *wsrc, *host, *user;
const char *src;
char *cmd, *p;
const char *q;
char c;
wsrc = argv[0];
/* Separate host from filename */
host = wsrc;
wsrc = colon(wsrc);
if (wsrc == NULL)
bump("Local file listing not supported");
*wsrc++ = '\0';
/* Substitute "." for empty filename */
if (*wsrc == '\0')
src = ".";
else
src = wsrc;
/* Separate username and hostname */
user = host;
host = strrchr(host, '@');
if (host == NULL) {
host = user;
user = NULL;
} else {
*host++ = '\0';
if (*user == '\0')
user = NULL;
}
cmd = snewn(4 * strlen(src) + 100, char);
strcpy(cmd, "ls -la '");
p = cmd + strlen(cmd);
for (q = src; *q; q++) {
if (*q == '\'') {
*p++ = '\'';
*p++ = '\\';
*p++ = '\'';
*p++ = '\'';
} else {
*p++ = *q;
}
}
*p++ = '\'';
*p = '\0';
do_cmd(host, user, cmd);
sfree(cmd);
if (using_sftp) {
scp_sftp_listdir(src);
} else {
stdio_sink ss;
stdio_sink_init(&ss, stdout);
StripCtrlChars *scc = stripctrl_new(
BinarySink_UPCAST(&ss), false, L'\0');
while (ssh_scp_recv(&c, 1))
put_byte(scc, c);
stripctrl_free(scc);
}
}
/*
* Short description of parameters.
*/
static void usage(void)
{
printf("PuTTY Secure Copy client\n");
printf("%s\n", ver);
printf("Usage: pscp [options] [user@]host:source target\n");
printf
(" pscp [options] source [source...] [user@]host:target\n");
printf(" pscp [options] -ls [user@]host:filespec\n");
printf("Options:\n");
printf(" -V print version information and exit\n");
printf(" -pgpfp print PGP key fingerprints and exit\n");
printf(" -p preserve file attributes\n");
printf(" -q quiet, don't show statistics\n");
printf(" -r copy directories recursively\n");
printf(" -v show verbose messages\n");
printf(" -load sessname Load settings from saved session\n");
printf(" -P port connect to specified port\n");
printf(" -l user connect with specified username\n");
printf(" -pw passw login with specified password\n");
printf(" -1 -2 force use of particular SSH protocol version\n");
printf(" -4 -6 force use of IPv4 or IPv6\n");
printf(" -C enable compression\n");
printf(" -i key private key file for user authentication\n");
printf(" -noagent disable use of Pageant\n");
printf(" -agent enable use of Pageant\n");
printf(" -hostkey aa:bb:cc:...\n");
printf(" manually specify a host key (may be repeated)\n");
printf(" -batch disable all interactive prompts\n");
printf(" -no-sanitise-stderr don't strip control chars from"
" standard error\n");
printf(" -proxycmd command\n");
printf(" use 'command' as local proxy\n");
printf(" -unsafe allow server-side wildcards (DANGEROUS)\n");
printf(" -sftp force use of SFTP protocol\n");
printf(" -scp force use of SCP protocol\n");
printf(" -sshlog file\n");
printf(" -sshrawlog file\n");
printf(" log protocol details to a file\n");
printf(" -logoverwrite\n");
printf(" -logappend\n");
printf(" control what happens when a log file already exists\n");
cleanup_exit(1);
}
void version(void)
{
char *buildinfo_text = buildinfo("\n");
printf("pscp: %s\n%s\n", ver, buildinfo_text);
sfree(buildinfo_text);
exit(0);
}
void cmdline_error(const char *p, ...)
{
va_list ap;
fprintf(stderr, "pscp: ");
va_start(ap, p);
vfprintf(stderr, p, ap);
va_end(ap);
fprintf(stderr, "\n try typing just \"pscp\" for help\n");
exit(1);
}
const bool share_can_be_downstream = true;
const bool share_can_be_upstream = false;
static stdio_sink stderr_ss;
static StripCtrlChars *stderr_scc;
const unsigned cmdline_tooltype = TOOLTYPE_FILETRANSFER;
/*
* Main program. (Called `psftp_main' because it gets called from
* *sftp.c; bit silly, I know, but it had to be called _something_.)
*/
int psftp_main(int argc, char *argv[])
{
int i;
bool sanitise_stderr = true;
sk_init();
/* Load Default Settings before doing anything else. */
conf = conf_new();
do_defaults(NULL, conf);
for (i = 1; i < argc; i++) {
int ret;
if (argv[i][0] != '-')
break;
ret = cmdline_process_param(argv[i], i+1<argc?argv[i+1]:NULL, 1, conf);
if (ret == -2) {
cmdline_error("option \"%s\" requires an argument", argv[i]);
} else if (ret == 2) {
i++; /* skip next argument */
} else if (ret == 1) {
/* We have our own verbosity in addition to `flags'. */
if (cmdline_verbose())
verbose = true;
} else if (strcmp(argv[i], "-pgpfp") == 0) {
pgp_fingerprints();
return 1;
} else if (strcmp(argv[i], "-r") == 0) {
recursive = true;
} else if (strcmp(argv[i], "-p") == 0) {
preserve = true;
} else if (strcmp(argv[i], "-q") == 0) {
statistics = false;
} else if (strcmp(argv[i], "-h") == 0 ||
strcmp(argv[i], "-?") == 0 ||
strcmp(argv[i], "--help") == 0) {
usage();
} else if (strcmp(argv[i], "-V") == 0 ||
strcmp(argv[i], "--version") == 0) {
version();
} else if (strcmp(argv[i], "-ls") == 0) {
list = true;
} else if (strcmp(argv[i], "-batch") == 0) {
console_batch_mode = true;
} else if (strcmp(argv[i], "-unsafe") == 0) {
scp_unsafe_mode = true;
} else if (strcmp(argv[i], "-sftp") == 0) {
try_scp = false; try_sftp = true;
} else if (strcmp(argv[i], "-scp") == 0) {
try_scp = true; try_sftp = false;
} else if (strcmp(argv[i], "-sanitise-stderr") == 0) {
sanitise_stderr = true;
} else if (strcmp(argv[i], "-no-sanitise-stderr") == 0) {
sanitise_stderr = false;
} else if (strcmp(argv[i], "--") == 0) {
i++;
break;
} else {
cmdline_error("unknown option \"%s\"", argv[i]);
}
}
argc -= i;
argv += i;
backend = NULL;
stdio_sink_init(&stderr_ss, stderr);
stderr_bs = BinarySink_UPCAST(&stderr_ss);
if (sanitise_stderr) {
stderr_scc = stripctrl_new(stderr_bs, false, L'\0');
stderr_bs = BinarySink_UPCAST(stderr_scc);
}
string_scc = stripctrl_new(NULL, false, L'\0');
if (list) {
if (argc != 1)
usage();
get_dir_list(argc, argv);
} else {
if (argc < 2)
usage();
if (argc > 2)
targetshouldbedirectory = true;
if (colon(argv[argc - 1]) != NULL)
toremote(argc, argv);
else
tolocal(argc, argv);
}
if (backend && backend_connected(backend)) {
char ch;
backend_special(backend, SS_EOF, 0);
sent_eof = true;
ssh_scp_recv(&ch, 1);
}
random_save_seed();
cmdline_cleanup();
if (backend) {
backend_free(backend);
backend = NULL;
}
sk_cleanup();
return (errs == 0 ? 0 : 1);
}
/* end */