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ftp.c
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/*
+----------------------------------------------------------------------+
| PHP Version 7 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2016 The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 3.01 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| http://www.php.net/license/3_01.txt |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| [email protected] so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Andrew Skalski <[email protected]> |
| Stefan Esser <[email protected]> (resume functions) |
+----------------------------------------------------------------------+
*/
/* $Id$ */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "php.h"
#if HAVE_FTP
#include <stdio.h>
#include <ctype.h>
#include <stdlib.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <fcntl.h>
#include <string.h>
#include <time.h>
#ifdef PHP_WIN32
#include <winsock2.h>
#elif defined(NETWARE)
#ifdef USE_WINSOCK /* Modified to use Winsock (NOVSOCK2.H), at least for now */
#include <novsock2.h>
#else
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#endif
#else
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#endif
#include <errno.h>
#if HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
#ifdef HAVE_SYS_SELECT_H
#include <sys/select.h>
#endif
#ifdef HAVE_FTP_SSL
#include <openssl/ssl.h>
#endif
#include "ftp.h"
#include "ext/standard/fsock.h"
/* Additional headers for NetWare */
#if defined(NETWARE) && !defined(USE_WINSOCK)
#include <sys/select.h>
#endif
/* sends an ftp command, returns true on success, false on error.
* it sends the string "cmd args\r\n" if args is non-null, or
* "cmd\r\n" if args is null
*/
static int ftp_putcmd( ftpbuf_t *ftp,
const char *cmd,
const char *args);
/* wrapper around send/recv to handle timeouts */
static int my_send(ftpbuf_t *ftp, php_socket_t s, void *buf, size_t len);
static int my_recv(ftpbuf_t *ftp, php_socket_t s, void *buf, size_t len);
static int my_accept(ftpbuf_t *ftp, php_socket_t s, struct sockaddr *addr, socklen_t *addrlen);
/* reads a line the socket , returns true on success, false on error */
static int ftp_readline(ftpbuf_t *ftp);
/* reads an ftp response, returns true on success, false on error */
static int ftp_getresp(ftpbuf_t *ftp);
/* sets the ftp transfer type */
static int ftp_type(ftpbuf_t *ftp, ftptype_t type);
/* opens up a data stream */
static databuf_t* ftp_getdata(ftpbuf_t *ftp);
/* accepts the data connection, returns updated data buffer */
static databuf_t* data_accept(databuf_t *data, ftpbuf_t *ftp);
/* closes the data connection, returns NULL */
static databuf_t* data_close(ftpbuf_t *ftp, databuf_t *data);
/* generic file lister */
static char** ftp_genlist(ftpbuf_t *ftp, const char *cmd, const char *path);
/* IP and port conversion box */
union ipbox {
struct in_addr ia[2];
unsigned short s[4];
unsigned char c[8];
};
/* {{{ ftp_open
*/
ftpbuf_t*
ftp_open(const char *host, short port, zend_long timeout_sec)
{
ftpbuf_t *ftp;
socklen_t size;
struct timeval tv;
/* alloc the ftp structure */
ftp = ecalloc(1, sizeof(*ftp));
tv.tv_sec = timeout_sec;
tv.tv_usec = 0;
ftp->fd = php_network_connect_socket_to_host(host,
(unsigned short) (port ? port : 21), SOCK_STREAM,
0, &tv, NULL, NULL, NULL, 0, STREAM_SOCKOP_NONE);
if (ftp->fd == -1) {
goto bail;
}
/* Default Settings */
ftp->timeout_sec = timeout_sec;
ftp->nb = 0;
size = sizeof(ftp->localaddr);
memset(&ftp->localaddr, 0, size);
if (getsockname(ftp->fd, (struct sockaddr*) &ftp->localaddr, &size) != 0) {
php_error_docref(NULL, E_WARNING, "getsockname failed: %s (%d)", strerror(errno), errno);
goto bail;
}
if (!ftp_getresp(ftp) || ftp->resp != 220) {
goto bail;
}
return ftp;
bail:
if (ftp->fd != -1) {
closesocket(ftp->fd);
}
efree(ftp);
return NULL;
}
/* }}} */
/* {{{ ftp_close
*/
ftpbuf_t*
ftp_close(ftpbuf_t *ftp)
{
if (ftp == NULL) {
return NULL;
}
if (ftp->data) {
data_close(ftp, ftp->data);
}
if (ftp->stream && ftp->closestream) {
php_stream_close(ftp->stream);
}
if (ftp->fd != -1) {
#ifdef HAVE_FTP_SSL
if (ftp->ssl_active) {
SSL_shutdown(ftp->ssl_handle);
SSL_free(ftp->ssl_handle);
}
#endif
closesocket(ftp->fd);
}
ftp_gc(ftp);
efree(ftp);
return NULL;
}
/* }}} */
/* {{{ ftp_gc
*/
void
ftp_gc(ftpbuf_t *ftp)
{
if (ftp == NULL) {
return;
}
if (ftp->pwd) {
efree(ftp->pwd);
ftp->pwd = NULL;
}
if (ftp->syst) {
efree(ftp->syst);
ftp->syst = NULL;
}
}
/* }}} */
/* {{{ ftp_quit
*/
int
ftp_quit(ftpbuf_t *ftp)
{
if (ftp == NULL) {
return 0;
}
if (!ftp_putcmd(ftp, "QUIT", NULL)) {
return 0;
}
if (!ftp_getresp(ftp) || ftp->resp != 221) {
return 0;
}
if (ftp->pwd) {
efree(ftp->pwd);
ftp->pwd = NULL;
}
return 1;
}
/* }}} */
/* {{{ ftp_login
*/
int
ftp_login(ftpbuf_t *ftp, const char *user, const char *pass)
{
#ifdef HAVE_FTP_SSL
SSL_CTX *ctx = NULL;
long ssl_ctx_options = SSL_OP_ALL;
int err, res;
zend_bool retry;
#endif
if (ftp == NULL) {
return 0;
}
#ifdef HAVE_FTP_SSL
if (ftp->use_ssl && !ftp->ssl_active) {
if (!ftp_putcmd(ftp, "AUTH", "TLS")) {
return 0;
}
if (!ftp_getresp(ftp)) {
return 0;
}
if (ftp->resp != 234) {
if (!ftp_putcmd(ftp, "AUTH", "SSL")) {
return 0;
}
if (!ftp_getresp(ftp)) {
return 0;
}
if (ftp->resp != 334) {
return 0;
} else {
ftp->old_ssl = 1;
ftp->use_ssl_for_data = 1;
}
}
ctx = SSL_CTX_new(SSLv23_client_method());
if (ctx == NULL) {
php_error_docref(NULL, E_WARNING, "failed to create the SSL context");
return 0;
}
#if OPENSSL_VERSION_NUMBER >= 0x0090605fL
ssl_ctx_options &= ~SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS;
#endif
SSL_CTX_set_options(ctx, ssl_ctx_options);
/* allow SSL to re-use sessions */
SSL_CTX_set_session_cache_mode(ctx, SSL_SESS_CACHE_BOTH);
ftp->ssl_handle = SSL_new(ctx);
if (ftp->ssl_handle == NULL) {
php_error_docref(NULL, E_WARNING, "failed to create the SSL handle");
SSL_CTX_free(ctx);
return 0;
}
SSL_set_fd(ftp->ssl_handle, ftp->fd);
do {
res = SSL_connect(ftp->ssl_handle);
err = SSL_get_error(ftp->ssl_handle, res);
/* TODO check if handling other error codes would make sense */
switch (err) {
case SSL_ERROR_NONE:
retry = 0;
break;
case SSL_ERROR_ZERO_RETURN:
retry = 0;
SSL_shutdown(ftp->ssl_handle);
break;
case SSL_ERROR_WANT_READ:
case SSL_ERROR_WANT_WRITE: {
php_pollfd p;
int i;
p.fd = ftp->fd;
p.events = (err == SSL_ERROR_WANT_READ) ? (POLLIN|POLLPRI) : POLLOUT;
p.revents = 0;
i = php_poll2(&p, 1, 300);
retry = i > 0;
}
break;
default:
php_error_docref(NULL, E_WARNING, "SSL/TLS handshake failed");
SSL_shutdown(ftp->ssl_handle);
SSL_free(ftp->ssl_handle);
return 0;
}
} while (retry);
ftp->ssl_active = 1;
if (!ftp->old_ssl) {
/* set protection buffersize to zero */
if (!ftp_putcmd(ftp, "PBSZ", "0")) {
return 0;
}
if (!ftp_getresp(ftp)) {
return 0;
}
/* enable data conn encryption */
if (!ftp_putcmd(ftp, "PROT", "P")) {
return 0;
}
if (!ftp_getresp(ftp)) {
return 0;
}
ftp->use_ssl_for_data = (ftp->resp >= 200 && ftp->resp <=299);
}
}
#endif
if (!ftp_putcmd(ftp, "USER", user)) {
return 0;
}
if (!ftp_getresp(ftp)) {
return 0;
}
if (ftp->resp == 230) {
return 1;
}
if (ftp->resp != 331) {
return 0;
}
if (!ftp_putcmd(ftp, "PASS", pass)) {
return 0;
}
if (!ftp_getresp(ftp)) {
return 0;
}
return (ftp->resp == 230);
}
/* }}} */
/* {{{ ftp_reinit
*/
int
ftp_reinit(ftpbuf_t *ftp)
{
if (ftp == NULL) {
return 0;
}
ftp_gc(ftp);
ftp->nb = 0;
if (!ftp_putcmd(ftp, "REIN", NULL)) {
return 0;
}
if (!ftp_getresp(ftp) || ftp->resp != 220) {
return 0;
}
return 1;
}
/* }}} */
/* {{{ ftp_syst
*/
const char*
ftp_syst(ftpbuf_t *ftp)
{
char *syst, *end;
if (ftp == NULL) {
return NULL;
}
/* default to cached value */
if (ftp->syst) {
return ftp->syst;
}
if (!ftp_putcmd(ftp, "SYST", NULL)) {
return NULL;
}
if (!ftp_getresp(ftp) || ftp->resp != 215) {
return NULL;
}
syst = ftp->inbuf;
while (*syst == ' ') {
syst++;
}
if ((end = strchr(syst, ' '))) {
*end = 0;
}
ftp->syst = estrdup(syst);
if (end) {
*end = ' ';
}
return ftp->syst;
}
/* }}} */
/* {{{ ftp_pwd
*/
const char*
ftp_pwd(ftpbuf_t *ftp)
{
char *pwd, *end;
if (ftp == NULL) {
return NULL;
}
/* default to cached value */
if (ftp->pwd) {
return ftp->pwd;
}
if (!ftp_putcmd(ftp, "PWD", NULL)) {
return NULL;
}
if (!ftp_getresp(ftp) || ftp->resp != 257) {
return NULL;
}
/* copy out the pwd from response */
if ((pwd = strchr(ftp->inbuf, '"')) == NULL) {
return NULL;
}
if ((end = strrchr(++pwd, '"')) == NULL) {
return NULL;
}
ftp->pwd = estrndup(pwd, end - pwd);
return ftp->pwd;
}
/* }}} */
/* {{{ ftp_exec
*/
int
ftp_exec(ftpbuf_t *ftp, const char *cmd)
{
if (ftp == NULL) {
return 0;
}
if (!ftp_putcmd(ftp, "SITE EXEC", cmd)) {
return 0;
}
if (!ftp_getresp(ftp) || ftp->resp != 200) {
return 0;
}
return 1;
}
/* }}} */
/* {{{ ftp_raw
*/
void
ftp_raw(ftpbuf_t *ftp, const char *cmd, zval *return_value)
{
if (ftp == NULL || cmd == NULL) {
RETURN_NULL();
}
if (!ftp_putcmd(ftp, cmd, NULL)) {
RETURN_NULL();
}
array_init(return_value);
while (ftp_readline(ftp)) {
add_next_index_string(return_value, ftp->inbuf);
if (isdigit(ftp->inbuf[0]) && isdigit(ftp->inbuf[1]) && isdigit(ftp->inbuf[2]) && ftp->inbuf[3] == ' ') {
return;
}
}
}
/* }}} */
/* {{{ ftp_chdir
*/
int
ftp_chdir(ftpbuf_t *ftp, const char *dir)
{
if (ftp == NULL) {
return 0;
}
if (ftp->pwd) {
efree(ftp->pwd);
ftp->pwd = NULL;
}
if (!ftp_putcmd(ftp, "CWD", dir)) {
return 0;
}
if (!ftp_getresp(ftp) || ftp->resp != 250) {
return 0;
}
return 1;
}
/* }}} */
/* {{{ ftp_cdup
*/
int
ftp_cdup(ftpbuf_t *ftp)
{
if (ftp == NULL) {
return 0;
}
if (ftp->pwd) {
efree(ftp->pwd);
ftp->pwd = NULL;
}
if (!ftp_putcmd(ftp, "CDUP", NULL)) {
return 0;
}
if (!ftp_getresp(ftp) || ftp->resp != 250) {
return 0;
}
return 1;
}
/* }}} */
/* {{{ ftp_mkdir
*/
zend_string*
ftp_mkdir(ftpbuf_t *ftp, const char *dir)
{
char *mkd, *end;
zend_string *ret;
if (ftp == NULL) {
return NULL;
}
if (!ftp_putcmd(ftp, "MKD", dir)) {
return NULL;
}
if (!ftp_getresp(ftp) || ftp->resp != 257) {
return NULL;
}
/* copy out the dir from response */
if ((mkd = strchr(ftp->inbuf, '"')) == NULL) {
return zend_string_init(dir, strlen(dir), 0);
}
if ((end = strrchr(++mkd, '"')) == NULL) {
return NULL;
}
*end = 0;
ret = zend_string_init(mkd, end - mkd, 0);
*end = '"';
return ret;
}
/* }}} */
/* {{{ ftp_rmdir
*/
int
ftp_rmdir(ftpbuf_t *ftp, const char *dir)
{
if (ftp == NULL) {
return 0;
}
if (!ftp_putcmd(ftp, "RMD", dir)) {
return 0;
}
if (!ftp_getresp(ftp) || ftp->resp != 250) {
return 0;
}
return 1;
}
/* }}} */
/* {{{ ftp_chmod
*/
int
ftp_chmod(ftpbuf_t *ftp, const int mode, const char *filename, const int filename_len)
{
char *buffer;
if (ftp == NULL || filename_len <= 0) {
return 0;
}
spprintf(&buffer, 0, "CHMOD %o %s", mode, filename);
if (!ftp_putcmd(ftp, "SITE", buffer)) {
efree(buffer);
return 0;
}
efree(buffer);
if (!ftp_getresp(ftp) || ftp->resp != 200) {
return 0;
}
return 1;
}
/* }}} */
/* {{{ ftp_alloc
*/
int
ftp_alloc(ftpbuf_t *ftp, const zend_long size, zend_string **response)
{
char buffer[64];
if (ftp == NULL || size <= 0) {
return 0;
}
snprintf(buffer, sizeof(buffer) - 1, ZEND_LONG_FMT, size);
if (!ftp_putcmd(ftp, "ALLO", buffer)) {
return 0;
}
if (!ftp_getresp(ftp)) {
return 0;
}
if (response) {
*response = zend_string_init(ftp->inbuf, strlen(ftp->inbuf), 0);
}
if (ftp->resp < 200 || ftp->resp >= 300) {
return 0;
}
return 1;
}
/* }}} */
/* {{{ ftp_nlist
*/
char**
ftp_nlist(ftpbuf_t *ftp, const char *path)
{
return ftp_genlist(ftp, "NLST", path);
}
/* }}} */
/* {{{ ftp_list
*/
char**
ftp_list(ftpbuf_t *ftp, const char *path, int recursive)
{
return ftp_genlist(ftp, ((recursive) ? "LIST -R" : "LIST"), path);
}
/* }}} */
/* {{{ ftp_type
*/
int
ftp_type(ftpbuf_t *ftp, ftptype_t type)
{
char typechar[2] = "?";
if (ftp == NULL) {
return 0;
}
if (type == ftp->type) {
return 1;
}
if (type == FTPTYPE_ASCII) {
typechar[0] = 'A';
} else if (type == FTPTYPE_IMAGE) {
typechar[0] = 'I';
} else {
return 0;
}
if (!ftp_putcmd(ftp, "TYPE", typechar)) {
return 0;
}
if (!ftp_getresp(ftp) || ftp->resp != 200) {
return 0;
}
ftp->type = type;
return 1;
}
/* }}} */
/* {{{ ftp_pasv
*/
int
ftp_pasv(ftpbuf_t *ftp, int pasv)
{
char *ptr;
union ipbox ipbox;
unsigned long b[6];
socklen_t n;
struct sockaddr *sa;
struct sockaddr_in *sin;
if (ftp == NULL) {
return 0;
}
if (pasv && ftp->pasv == 2) {
return 1;
}
ftp->pasv = 0;
if (!pasv) {
return 1;
}
n = sizeof(ftp->pasvaddr);
memset(&ftp->pasvaddr, 0, n);
sa = (struct sockaddr *) &ftp->pasvaddr;
if (getpeername(ftp->fd, sa, &n) < 0) {
return 0;
}
#if HAVE_IPV6
if (sa->sa_family == AF_INET6) {
struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) sa;
char *endptr, delimiter;
/* try EPSV first */
if (!ftp_putcmd(ftp, "EPSV", NULL)) {
return 0;
}
if (!ftp_getresp(ftp)) {
return 0;
}
if (ftp->resp == 229) {
/* parse out the port */
for (ptr = ftp->inbuf; *ptr && *ptr != '('; ptr++);
if (!*ptr) {
return 0;
}
delimiter = *++ptr;
for (n = 0; *ptr && n < 3; ptr++) {
if (*ptr == delimiter) {
n++;
}
}
sin6->sin6_port = htons((unsigned short) strtoul(ptr, &endptr, 10));
if (ptr == endptr || *endptr != delimiter) {
return 0;
}
ftp->pasv = 2;
return 1;
}
}
/* fall back to PASV */
#endif
if (!ftp_putcmd(ftp, "PASV", NULL)) {
return 0;
}
if (!ftp_getresp(ftp) || ftp->resp != 227) {
return 0;
}
/* parse out the IP and port */
for (ptr = ftp->inbuf; *ptr && !isdigit(*ptr); ptr++);
n = sscanf(ptr, "%lu,%lu,%lu,%lu,%lu,%lu", &b[0], &b[1], &b[2], &b[3], &b[4], &b[5]);
if (n != 6) {
return 0;
}
for (n = 0; n < 6; n++) {
ipbox.c[n] = (unsigned char) b[n];
}
sin = (struct sockaddr_in *) sa;
if (ftp->usepasvaddress) {
sin->sin_addr = ipbox.ia[0];
}
sin->sin_port = ipbox.s[2];
ftp->pasv = 2;
return 1;
}
/* }}} */
/* {{{ ftp_get
*/
int
ftp_get(ftpbuf_t *ftp, php_stream *outstream, const char *path, ftptype_t type, zend_long resumepos)
{
databuf_t *data = NULL;
size_t rcvd;
char arg[11];
if (ftp == NULL) {
return 0;
}
if (!ftp_type(ftp, type)) {
goto bail;
}
if ((data = ftp_getdata(ftp)) == NULL) {
goto bail;
}
ftp->data = data;
if (resumepos > 0) {
snprintf(arg, sizeof(arg), ZEND_LONG_FMT, resumepos);
if (!ftp_putcmd(ftp, "REST", arg)) {
goto bail;
}
if (!ftp_getresp(ftp) || (ftp->resp != 350)) {
goto bail;
}
}
if (!ftp_putcmd(ftp, "RETR", path)) {
goto bail;
}
if (!ftp_getresp(ftp) || (ftp->resp != 150 && ftp->resp != 125)) {
goto bail;
}
if ((data = data_accept(data, ftp)) == NULL) {
goto bail;
}
while ((rcvd = my_recv(ftp, data->fd, data->buf, FTP_BUFSIZE))) {
if (rcvd == (size_t)-1) {
goto bail;
}
if (type == FTPTYPE_ASCII) {
#ifndef PHP_WIN32
char *s;
#endif
char *ptr = data->buf;
char *e = ptr + rcvd;
/* logic depends on the OS EOL
* Win32 -> \r\n
* Everything Else \n
*/
#ifdef PHP_WIN32
php_stream_write(outstream, ptr, (e - ptr));
ptr = e;
#else
while (e > ptr && (s = memchr(ptr, '\r', (e - ptr)))) {
php_stream_write(outstream, ptr, (s - ptr));
if (*(s + 1) == '\n') {
s++;
php_stream_putc(outstream, '\n');
}
ptr = s + 1;
}
#endif
if (ptr < e) {
php_stream_write(outstream, ptr, (e - ptr));
}
} else if (rcvd != php_stream_write(outstream, data->buf, rcvd)) {
goto bail;
}
}
ftp->data = data = data_close(ftp, data);
if (!ftp_getresp(ftp) || (ftp->resp != 226 && ftp->resp != 250)) {
goto bail;
}
return 1;
bail:
ftp->data = data_close(ftp, data);
return 0;
}
/* }}} */
/* {{{ ftp_put
*/
int
ftp_put(ftpbuf_t *ftp, const char *path, php_stream *instream, ftptype_t type, zend_long startpos)
{
databuf_t *data = NULL;
zend_long size;
char *ptr;
int ch;
char arg[11];
if (ftp == NULL) {
return 0;
}
if (!ftp_type(ftp, type)) {
goto bail;
}
if ((data = ftp_getdata(ftp)) == NULL) {
goto bail;
}
ftp->data = data;
if (startpos > 0) {
snprintf(arg, sizeof(arg), ZEND_LONG_FMT, startpos);
if (!ftp_putcmd(ftp, "REST", arg)) {
goto bail;
}
if (!ftp_getresp(ftp) || (ftp->resp != 350)) {
goto bail;
}
}
if (!ftp_putcmd(ftp, "STOR", path)) {
goto bail;
}
if (!ftp_getresp(ftp) || (ftp->resp != 150 && ftp->resp != 125)) {
goto bail;
}
if ((data = data_accept(data, ftp)) == NULL) {
goto bail;
}
size = 0;
ptr = data->buf;
while (!php_stream_eof(instream) && (ch = php_stream_getc(instream))!=EOF) {
/* flush if necessary */
if (FTP_BUFSIZE - size < 2) {
if (my_send(ftp, data->fd, data->buf, size) != size) {
goto bail;
}
ptr = data->buf;
size = 0;
}
if (ch == '\n' && type == FTPTYPE_ASCII) {
*ptr++ = '\r';
size++;
}
*ptr++ = ch;
size++;
}
if (size && my_send(ftp, data->fd, data->buf, size) != size) {
goto bail;
}
ftp->data = data = data_close(ftp, data);
if (!ftp_getresp(ftp) || (ftp->resp != 226 && ftp->resp != 250 && ftp->resp != 200)) {
goto bail;
}
return 1;
bail:
ftp->data = data_close(ftp, data);
return 0;
}
/* }}} */
/* {{{ ftp_size
*/
zend_long