mirror of
https://git.tartarus.org/simon/putty.git
synced 2025-07-02 03:52:49 -05:00
psftp now works as part of the PuTTY suite
[originally from svn r940]
This commit is contained in:
Simon Tatham
470
psftp.c
470
psftp.c
@ -2,18 +2,20 @@
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* psftp.c: front end for PSFTP.
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*/
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#include <windows.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#include <assert.h>
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#define PUTTY_DO_GLOBALS
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#include "putty.h"
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#include "storage.h"
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#include "ssh.h"
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#include "sftp.h"
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#include "int64.h"
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#define smalloc malloc
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#define srealloc realloc
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#define sfree free
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/* ----------------------------------------------------------------------
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* String handling routines.
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*/
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@ -75,12 +77,20 @@ char *pwd, *homedir;
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*/
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char *canonify(char *name) {
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char *fullname, *canonname;
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if (name[0] == '/') {
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fullname = dupstr(name);
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} else {
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fullname = dupcat(pwd, "/", name, NULL);
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char *slash;
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if (pwd[strlen(pwd)-1] == '/')
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slash = "";
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else
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slash = "/";
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fullname = dupcat(pwd, slash, name, NULL);
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}
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canonname = fxp_realpath(name);
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canonname = fxp_realpath(fullname);
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if (canonname) {
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sfree(fullname);
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return canonname;
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@ -383,6 +393,7 @@ static struct sftp_cmd_lookup {
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*/
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{"bye", sftp_cmd_quit},
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{"cd", sftp_cmd_cd},
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{"dir", sftp_cmd_ls},
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{"exit", sftp_cmd_quit},
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{"get", sftp_cmd_get},
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{"ls", sftp_cmd_ls},
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@ -539,15 +550,448 @@ void do_sftp(void) {
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if (cmd->obey(cmd) < 0)
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break;
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}
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/* ------------------------------------------------------------------
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* We've received an exit command. Tidy up and leave.
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*/
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io_finish();
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}
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int main(void) {
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io_init();
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/* ----------------------------------------------------------------------
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* Dirty bits: integration with PuTTY.
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*/
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static int verbose = 0;
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void verify_ssh_host_key(char *host, int port, char *keytype,
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char *keystr, char *fingerprint) {
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int ret;
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static const char absentmsg[] =
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"The server's host key is not cached in the registry. You\n"
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"have no guarantee that the server is the computer you\n"
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"think it is.\n"
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"The server's key fingerprint is:\n"
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"%s\n"
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"If you trust this host, enter \"y\" to add the key to\n"
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"PuTTY's cache and carry on connecting.\n"
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"If you do not trust this host, enter \"n\" to abandon the\n"
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"connection.\n"
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"Continue connecting? (y/n) ";
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static const char wrongmsg[] =
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"WARNING - POTENTIAL SECURITY BREACH!\n"
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"The server's host key does not match the one PuTTY has\n"
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"cached in the registry. This means that either the\n"
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"server administrator has changed the host key, or you\n"
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"have actually connected to another computer pretending\n"
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"to be the server.\n"
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"The new key fingerprint is:\n"
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"%s\n"
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"If you were expecting this change and trust the new key,\n"
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"enter Yes to update PuTTY's cache and continue connecting.\n"
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"If you want to carry on connecting but without updating\n"
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"the cache, enter No.\n"
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"If you want to abandon the connection completely, press\n"
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"Return to cancel. Pressing Return is the ONLY guaranteed\n"
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"safe choice.\n"
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"Update cached key? (y/n, Return cancels connection) ";
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static const char abandoned[] = "Connection abandoned.\n";
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char line[32];
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/*
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* Verify the key against the registry.
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*/
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ret = verify_host_key(host, port, keytype, keystr);
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if (ret == 0) /* success - key matched OK */
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return;
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if (ret == 2) { /* key was different */
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fprintf(stderr, wrongmsg, fingerprint);
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if (fgets(line, sizeof(line), stdin) &&
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line[0] != '\0' && line[0] != '\n') {
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if (line[0] == 'y' || line[0] == 'Y')
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store_host_key(host, port, keytype, keystr);
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} else {
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fprintf(stderr, abandoned);
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exit(0);
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}
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}
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if (ret == 1) { /* key was absent */
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fprintf(stderr, absentmsg, fingerprint);
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if (fgets(line, sizeof(line), stdin) &&
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(line[0] == 'y' || line[0] == 'Y'))
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store_host_key(host, port, keytype, keystr);
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else {
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fprintf(stderr, abandoned);
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exit(0);
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}
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}
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}
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/*
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* Print an error message and perform a fatal exit.
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*/
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void fatalbox(char *fmt, ...)
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{
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char str[0x100]; /* Make the size big enough */
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va_list ap;
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va_start(ap, fmt);
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strcpy(str, "Fatal:");
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vsprintf(str+strlen(str), fmt, ap);
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va_end(ap);
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strcat(str, "\n");
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fprintf(stderr, str);
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exit(1);
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}
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void connection_fatal(char *fmt, ...)
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{
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char str[0x100]; /* Make the size big enough */
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va_list ap;
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va_start(ap, fmt);
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strcpy(str, "Fatal:");
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vsprintf(str+strlen(str), fmt, ap);
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va_end(ap);
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strcat(str, "\n");
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fprintf(stderr, str);
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exit(1);
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}
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void logevent(char *string) { }
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void ldisc_send(char *buf, int len) {
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/*
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* This is only here because of the calls to ldisc_send(NULL,
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* 0) in ssh.c. Nothing in PSFTP actually needs to use the
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* ldisc as an ldisc. So if we get called with any real data, I
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* want to know about it.
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*/
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assert(len == 0);
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}
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/*
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* Be told what socket we're supposed to be using.
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*/
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static SOCKET sftp_ssh_socket;
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char *do_select(SOCKET skt, int startup) {
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if (startup)
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sftp_ssh_socket = skt;
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else
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sftp_ssh_socket = INVALID_SOCKET;
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return NULL;
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}
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extern int select_result(WPARAM, LPARAM);
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/*
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* Receive a block of data from the SSH link. Block until all data
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* is available.
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*
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* To do this, we repeatedly call the SSH protocol module, with our
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* own trap in from_backend() to catch the data that comes back. We
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* do this until we have enough data.
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*/
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static unsigned char *outptr; /* where to put the data */
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static unsigned outlen; /* how much data required */
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static unsigned char *pending = NULL; /* any spare data */
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static unsigned pendlen=0, pendsize=0; /* length and phys. size of buffer */
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void from_backend(int is_stderr, char *data, int datalen) {
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unsigned char *p = (unsigned char *)data;
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unsigned len = (unsigned)datalen;
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/*
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* stderr data is just spouted to local stderr and otherwise
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* ignored.
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*/
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if (is_stderr) {
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fwrite(data, 1, len, stderr);
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return;
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}
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/*
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* If this is before the real session begins, just return.
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*/
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if (!outptr)
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return;
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if (outlen > 0) {
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unsigned used = outlen;
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if (used > len) used = len;
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memcpy(outptr, p, used);
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outptr += used; outlen -= used;
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p += used; len -= used;
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}
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if (len > 0) {
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if (pendsize < pendlen + len) {
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pendsize = pendlen + len + 4096;
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pending = (pending ? srealloc(pending, pendsize) :
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smalloc(pendsize));
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if (!pending)
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fatalbox("Out of memory");
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}
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memcpy(pending+pendlen, p, len);
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pendlen += len;
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}
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}
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int sftp_recvdata(char *buf, int len) {
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outptr = (unsigned char *)buf;
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outlen = len;
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/*
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* See if the pending-input block contains some of what we
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* need.
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*/
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if (pendlen > 0) {
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unsigned pendused = pendlen;
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if (pendused > outlen)
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pendused = outlen;
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memcpy(outptr, pending, pendused);
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memmove(pending, pending+pendused, pendlen-pendused);
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outptr += pendused;
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outlen -= pendused;
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pendlen -= pendused;
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if (pendlen == 0) {
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pendsize = 0;
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sfree(pending);
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pending = NULL;
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}
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if (outlen == 0)
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return 1;
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}
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while (outlen > 0) {
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fd_set readfds;
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FD_ZERO(&readfds);
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FD_SET(sftp_ssh_socket, &readfds);
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if (select(1, &readfds, NULL, NULL, NULL) < 0)
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return 0; /* doom */
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select_result((WPARAM)sftp_ssh_socket, (LPARAM)FD_READ);
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}
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return 1;
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}
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int sftp_senddata(char *buf, int len) {
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back->send((unsigned char *)buf, len);
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return 1;
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}
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/*
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* Loop through the ssh connection and authentication process.
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*/
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static void ssh_sftp_init(void) {
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if (sftp_ssh_socket == INVALID_SOCKET)
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return;
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while (!back->sendok()) {
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fd_set readfds;
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FD_ZERO(&readfds);
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FD_SET(sftp_ssh_socket, &readfds);
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if (select(1, &readfds, NULL, NULL, NULL) < 0)
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return; /* doom */
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select_result((WPARAM)sftp_ssh_socket, (LPARAM)FD_READ);
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}
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}
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static char *password = NULL;
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static int get_password(const char *prompt, char *str, int maxlen)
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{
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HANDLE hin, hout;
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DWORD savemode, i;
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if (password) {
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static int tried_once = 0;
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if (tried_once) {
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return 0;
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} else {
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strncpy(str, password, maxlen);
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str[maxlen-1] = '\0';
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tried_once = 1;
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return 1;
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}
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}
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hin = GetStdHandle(STD_INPUT_HANDLE);
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hout = GetStdHandle(STD_OUTPUT_HANDLE);
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if (hin == INVALID_HANDLE_VALUE || hout == INVALID_HANDLE_VALUE) {
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fprintf(stderr, "Cannot get standard input/output handles\n");
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exit(1);
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}
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GetConsoleMode(hin, &savemode);
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SetConsoleMode(hin, (savemode & (~ENABLE_ECHO_INPUT)) |
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ENABLE_PROCESSED_INPUT | ENABLE_LINE_INPUT);
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WriteFile(hout, prompt, strlen(prompt), &i, NULL);
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ReadFile(hin, str, maxlen-1, &i, NULL);
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SetConsoleMode(hin, savemode);
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if ((int)i > maxlen) i = maxlen-1; else i = i - 2;
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str[i] = '\0';
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WriteFile(hout, "\r\n", 2, &i, NULL);
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return 1;
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}
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/*
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* Initialize the Win$ock driver.
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*/
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static void init_winsock(void)
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{
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WORD winsock_ver;
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WSADATA wsadata;
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winsock_ver = MAKEWORD(1, 1);
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if (WSAStartup(winsock_ver, &wsadata)) {
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fprintf(stderr, "Unable to initialise WinSock");
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exit(1);
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}
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if (LOBYTE(wsadata.wVersion) != 1 ||
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HIBYTE(wsadata.wVersion) != 1) {
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fprintf(stderr, "WinSock version is incompatible with 1.1");
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exit(1);
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}
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}
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/*
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* Short description of parameters.
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*/
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static void usage(void)
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{
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printf("PuTTY Secure File Transfer (SFTP) client\n");
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printf("%s\n", ver);
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printf("Usage: psftp [options] user@host\n");
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printf("Options:\n");
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printf(" -v show verbose messages\n");
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printf(" -P port connect to specified port\n");
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printf(" -pw passw login with specified password\n");
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exit(1);
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}
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/*
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* Main program. Parse arguments etc.
|
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*/
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int main(int argc, char *argv[])
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{
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int i;
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int portnumber = 0;
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char *user, *host, *userhost, *realhost;
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char *err;
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|
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flags = FLAG_STDERR;
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ssh_get_password = &get_password;
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init_winsock();
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sk_init();
|
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|
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userhost = user = NULL;
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|
||||
for (i = 1; i < argc; i++) {
|
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if (argv[i][0] != '-') {
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if (userhost)
|
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usage();
|
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else
|
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userhost = dupstr(argv[i]);
|
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} else if (strcmp(argv[i], "-v") == 0) {
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verbose = 1, flags |= FLAG_VERBOSE;
|
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} else if (strcmp(argv[i], "-h") == 0 ||
|
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strcmp(argv[i], "-?") == 0) {
|
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usage();
|
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} else if (strcmp(argv[i], "-l") == 0 && i+1 < argc) {
|
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user = argv[++i];
|
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} else if (strcmp(argv[i], "-P") == 0 && i+1 < argc) {
|
||||
portnumber = atoi(argv[++i]);
|
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} else if (strcmp(argv[i], "-pw") == 0 && i+1 < argc) {
|
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password = argv[++i];
|
||||
} else if (strcmp(argv[i], "--") == 0) {
|
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i++;
|
||||
break;
|
||||
} else {
|
||||
usage();
|
||||
}
|
||||
}
|
||||
argc -= i;
|
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argv += i;
|
||||
back = NULL;
|
||||
|
||||
if (argc > 0 || !userhost)
|
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usage();
|
||||
|
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/* Separate host and username */
|
||||
host = userhost;
|
||||
host = strrchr(host, '@');
|
||||
if (host == NULL) {
|
||||
host = userhost;
|
||||
} else {
|
||||
*host++ = '\0';
|
||||
if (user) {
|
||||
printf("psftp: multiple usernames specified; using \"%s\"\n", user);
|
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} else
|
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user = userhost;
|
||||
}
|
||||
|
||||
/* Try to load settings for this host */
|
||||
do_defaults(host, &cfg);
|
||||
if (cfg.host[0] == '\0') {
|
||||
/* No settings for this host; use defaults */
|
||||
do_defaults(NULL, &cfg);
|
||||
strncpy(cfg.host, host, sizeof(cfg.host)-1);
|
||||
cfg.host[sizeof(cfg.host)-1] = '\0';
|
||||
cfg.port = 22;
|
||||
}
|
||||
|
||||
/* Set username */
|
||||
if (user != NULL && user[0] != '\0') {
|
||||
strncpy(cfg.username, user, sizeof(cfg.username)-1);
|
||||
cfg.username[sizeof(cfg.username)-1] = '\0';
|
||||
}
|
||||
if (!cfg.username[0]) {
|
||||
printf("login as: ");
|
||||
if (!fgets(cfg.username, sizeof(cfg.username), stdin)) {
|
||||
fprintf(stderr, "psftp: aborting\n");
|
||||
exit(1);
|
||||
} else {
|
||||
int len = strlen(cfg.username);
|
||||
if (cfg.username[len-1] == '\n')
|
||||
cfg.username[len-1] = '\0';
|
||||
}
|
||||
}
|
||||
|
||||
if (cfg.protocol != PROT_SSH)
|
||||
cfg.port = 22;
|
||||
|
||||
if (portnumber)
|
||||
cfg.port = portnumber;
|
||||
|
||||
/* SFTP uses SSH2 by default always */
|
||||
cfg.sshprot = 2;
|
||||
|
||||
/* Set up subsystem name. FIXME: fudge for SSH1. */
|
||||
strcpy(cfg.remote_cmd, "sftp");
|
||||
cfg.ssh_subsys = TRUE;
|
||||
cfg.nopty = TRUE;
|
||||
|
||||
back = &ssh_backend;
|
||||
|
||||
err = back->init(cfg.host, cfg.port, &realhost);
|
||||
if (err != NULL) {
|
||||
fprintf(stderr, "ssh_init: %s", err);
|
||||
return 1;
|
||||
}
|
||||
ssh_sftp_init();
|
||||
if (verbose && realhost != NULL)
|
||||
printf("Connected to %s\n", realhost);
|
||||
|
||||
do_sftp();
|
||||
|
||||
if (back != NULL && back->socket() != NULL) {
|
||||
char ch;
|
||||
back->special(TS_EOF);
|
||||
sftp_recvdata(&ch, 1);
|
||||
}
|
||||
WSACleanup();
|
||||
random_save_seed();
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user