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217b753a3d
php-src/ext/ftp/ftp.c
Ilija Tovilo 4f934cb7f7
Fix compilation of ftp without openssl 
Closes GH-12866
2023-12-05 11:55:44 +01:00

2311 lines
46 KiB
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/*
+----------------------------------------------------------------------+
| Copyright (c) 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: |
| https://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 |
| license@php.net so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Andrew Skalski <askalski@chek.com> |
| Stefan Esser <sesser@php.net> (resume functions) |
+----------------------------------------------------------------------+
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "php.h"
#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>
#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>
#ifdef 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>
#include <openssl/err.h>
#endif
#include "ftp.h"
#include "ext/standard/fsock.h"
#ifdef PHP_WIN32
# undef ETIMEDOUT
# define ETIMEDOUT WSAETIMEDOUT
#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 size_t cmd_len,
const char *args,
const size_t args_len);
/* 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 size_t cmd_len, const char *path, const size_t path_len);
#ifdef HAVE_FTP_SSL
/* shuts down a TLS/SSL connection */
static void ftp_ssl_shutdown(ftpbuf_t *ftp, php_socket_t fd, SSL *ssl_handle);
#endif
/* 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;
}
#ifdef HAVE_FTP_SSL
if (ftp->last_ssl_session) {
SSL_SESSION_free(ftp->last_ssl_session);
}
#endif
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) {
ftp_ssl_shutdown(ftp, ftp->fd, 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", sizeof("QUIT")-1, NULL, (size_t) 0)) {
return 0;
}
if (!ftp_getresp(ftp) || ftp->resp != 221) {
return 0;
}
if (ftp->pwd) {
efree(ftp->pwd);
ftp->pwd = NULL;
}
return 1;
}
/* }}} */
#ifdef HAVE_FTP_SSL
static int ftp_ssl_new_session_cb(SSL *ssl, SSL_SESSION *sess)
{
ftpbuf_t *ftp = SSL_get_app_data(ssl);
/* Technically there can be multiple sessions per connection, but we only care about the most recent one. */
if (ftp->last_ssl_session) {
SSL_SESSION_free(ftp->last_ssl_session);
}
ftp->last_ssl_session = SSL_get1_session(ssl);
/* Return 0 as we are not using OpenSSL's session cache. */
return 0;
}
#endif
/* {{{ ftp_login */
int
ftp_login(ftpbuf_t *ftp, const char *user, const size_t user_len, const char *pass, const size_t pass_len)
{
#ifdef HAVE_FTP_SSL
SSL_CTX *ctx = NULL;
long ssl_ctx_options = SSL_OP_ALL;
int err, res;
bool retry;
#endif
if (ftp == NULL) {
return 0;
}
#ifdef HAVE_FTP_SSL
if (ftp->use_ssl && !ftp->ssl_active) {
if (!ftp_putcmd(ftp, "AUTH", sizeof("AUTH")-1, "TLS", sizeof("TLS")-1)) {
return 0;
}
if (!ftp_getresp(ftp)) {
return 0;
}
if (ftp->resp != 234) {
if (!ftp_putcmd(ftp, "AUTH", sizeof("AUTH")-1, "SSL", sizeof("SSL")-1)) {
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.
* We're relying on our own session storage as only at most one session will ever be active per FTP connection. */
SSL_CTX_set_session_cache_mode(ctx, SSL_SESS_CACHE_BOTH | SSL_SESS_CACHE_NO_INTERNAL);
SSL_CTX_sess_set_new_cb(ctx, ftp_ssl_new_session_cb);
ftp->ssl_handle = SSL_new(ctx);
SSL_set_app_data(ftp->ssl_handle, ftp); /* Needed for ftp_ssl_new_session_cb */
SSL_CTX_free(ctx);
if (ftp->ssl_handle == NULL) {
php_error_docref(NULL, E_WARNING, "Failed to create the SSL handle");
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", sizeof("PBSZ")-1, "0", sizeof("0")-1)) {
return 0;
}
if (!ftp_getresp(ftp)) {
return 0;
}
/* enable data conn encryption */
if (!ftp_putcmd(ftp, "PROT", sizeof("PROT")-1, "P", sizeof("P")-1)) {
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", sizeof("USER")-1, user, user_len)) {
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", sizeof("PASS")-1, pass, pass_len)) {
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", sizeof("REIN")-1, NULL, (size_t) 0)) {
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", sizeof("SYST")-1, NULL, (size_t) 0)) {
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", sizeof("PWD")-1, NULL, (size_t) 0)) {
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, const size_t cmd_len)
{
if (ftp == NULL) {
return 0;
}
if (!ftp_putcmd(ftp, "SITE EXEC", sizeof("SITE EXEC")-1, cmd, cmd_len)) {
return 0;
}
if (!ftp_getresp(ftp) || ftp->resp != 200) {
return 0;
}
return 1;
}
/* }}} */
/* {{{ ftp_raw */
void
ftp_raw(ftpbuf_t *ftp, const char *cmd, const size_t cmd_len, zval *return_value)
{
if (ftp == NULL || cmd == NULL) {
RETURN_NULL();
}
if (!ftp_putcmd(ftp, cmd, cmd_len, NULL, (size_t) 0)) {
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, const size_t dir_len)
{
if (ftp == NULL) {
return 0;
}
if (ftp->pwd) {
efree(ftp->pwd);
ftp->pwd = NULL;
}
if (!ftp_putcmd(ftp, "CWD", sizeof("CWD")-1, dir, dir_len)) {
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", sizeof("CDUP")-1, NULL, (size_t) 0)) {
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, const size_t dir_len)
{
char *mkd, *end;
zend_string *ret;
if (ftp == NULL) {
return NULL;
}
if (!ftp_putcmd(ftp, "MKD", sizeof("MKD")-1, dir, dir_len)) {
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, dir_len, 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, const size_t dir_len)
{
if (ftp == NULL) {
return 0;
}
if (!ftp_putcmd(ftp, "RMD", sizeof("RMD")-1, dir, dir_len)) {
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;
size_t buffer_len;
if (ftp == NULL || filename_len <= 0) {
return 0;
}
buffer_len = spprintf(&buffer, 0, "CHMOD %o %s", mode, filename);
if (!buffer) {
return 0;
}
if (!ftp_putcmd(ftp, "SITE", sizeof("SITE")-1, buffer, buffer_len)) {
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];
int buffer_len;
if (ftp == NULL || size <= 0) {
return 0;
}
buffer_len = snprintf(buffer, sizeof(buffer) - 1, ZEND_LONG_FMT, size);
if (buffer_len < 0) {
return 0;
}
if (!ftp_putcmd(ftp, "ALLO", sizeof("ALLO")-1, buffer, buffer_len)) {
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, const size_t path_len)
{
return ftp_genlist(ftp, "NLST", sizeof("NLST")-1, path, path_len);
}
/* }}} */
/* {{{ ftp_list */
char**
ftp_list(ftpbuf_t *ftp, const char *path, const size_t path_len, int recursive)
{
return ftp_genlist(ftp, ((recursive) ? "LIST -R" : "LIST"), ((recursive) ? sizeof("LIST -R")-1 : sizeof("LIST")-1), path, path_len);
}
/* }}} */
/* {{{ ftp_mlsd */
char**
ftp_mlsd(ftpbuf_t *ftp, const char *path, const size_t path_len)
{
return ftp_genlist(ftp, "MLSD", sizeof("MLSD")-1, path, path_len);
}
/* }}} */
/* {{{ ftp_mlsd_parse_line */
int
ftp_mlsd_parse_line(HashTable *ht, const char *input) {
zval zstr;
const char *end = input + strlen(input);
const char *sp = memchr(input, ' ', end - input);
if (!sp) {
php_error_docref(NULL, E_WARNING, "Missing pathname in MLSD response");
return FAILURE;
}
/* Extract pathname */
ZVAL_STRINGL(&zstr, sp + 1, end - sp - 1);
zend_hash_str_update(ht, "name", sizeof("name")-1, &zstr);
end = sp;
while (input < end) {
const char *semi, *eq;
/* Find end of fact */
semi = memchr(input, ';', end - input);
if (!semi) {
php_error_docref(NULL, E_WARNING, "Malformed fact in MLSD response");
return FAILURE;
}
/* Separate fact key and value */
eq = memchr(input, '=', semi - input);
if (!eq) {
php_error_docref(NULL, E_WARNING, "Malformed fact in MLSD response");
return FAILURE;
}
ZVAL_STRINGL(&zstr, eq + 1, semi - eq - 1);
zend_hash_str_update(ht, input, eq - input, &zstr);
input = semi + 1;
}
return SUCCESS;
}
/* }}} */
/* {{{ ftp_type */
int
ftp_type(ftpbuf_t *ftp, ftptype_t type)
{
const char *typechar;
if (ftp == NULL) {
return 0;
}
if (type == ftp->type) {
return 1;
}
if (type == FTPTYPE_ASCII) {
typechar = "A";
} else if (type == FTPTYPE_IMAGE) {
typechar = "I";
} else {
return 0;
}
if (!ftp_putcmd(ftp, "TYPE", sizeof("TYPE")-1, typechar, 1)) {
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;
}
#ifdef 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", sizeof("EPSV")-1, NULL, (size_t) 0)) {
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", sizeof("PASV")-1, NULL, (size_t) 0)) {
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, const size_t path_len, ftptype_t type, zend_long resumepos)
{
databuf_t *data = NULL;
size_t rcvd;
char arg[MAX_LENGTH_OF_LONG];
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) {
int arg_len = snprintf(arg, sizeof(arg), ZEND_LONG_FMT, resumepos);
if (arg_len < 0) {
goto bail;
}
if (!ftp_putcmd(ftp, "REST", sizeof("REST")-1, arg, arg_len)) {
goto bail;
}
if (!ftp_getresp(ftp) || (ftp->resp != 350)) {
goto bail;
}
}
if (!ftp_putcmd(ftp, "RETR", sizeof("RETR")-1, path, path_len)) {
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, const size_t path_len, php_stream *instream, ftptype_t type, zend_long startpos)
{
databuf_t *data = NULL;
zend_long size;
char *ptr;
int ch;
char arg[MAX_LENGTH_OF_LONG];
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) {
int arg_len = snprintf(arg, sizeof(arg), ZEND_LONG_FMT, startpos);
if (arg_len < 0) {
goto bail;
}
if (!ftp_putcmd(ftp, "REST", sizeof("REST")-1, arg, arg_len)) {
goto bail;
}
if (!ftp_getresp(ftp) || (ftp->resp != 350)) {
goto bail;
}
}
if (!ftp_putcmd(ftp, "STOR", sizeof("STOR")-1, path, path_len)) {
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_append */
int
ftp_append(ftpbuf_t *ftp, const char *path, const size_t path_len, php_stream *instream, ftptype_t type)
{
databuf_t *data = NULL;
zend_long size;
char *ptr;
int ch;
if (ftp == NULL) {
return 0;
}
if (!ftp_type(ftp, type)) {
goto bail;
}
if ((data = ftp_getdata(ftp)) == NULL) {
goto bail;
}
ftp->data = data;
if (!ftp_putcmd(ftp, "APPE", sizeof("APPE")-1, path, path_len)) {
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
ftp_size(ftpbuf_t *ftp, const char *path, const size_t path_len)
{
if (ftp == NULL) {
return -1;
}
if (!ftp_type(ftp, FTPTYPE_IMAGE)) {
return -1;
}
if (!ftp_putcmd(ftp, "SIZE", sizeof("SIZE")-1, path, path_len)) {
return -1;
}
if (!ftp_getresp(ftp) || ftp->resp != 213) {
return -1;
}
return ZEND_ATOL(ftp->inbuf);
}
/* }}} */
/* {{{ ftp_mdtm */
time_t
ftp_mdtm(ftpbuf_t *ftp, const char *path, const size_t path_len)
{
time_t stamp;
struct tm *gmt, tmbuf;
struct tm tm;
char *ptr;
int n;
if (ftp == NULL) {
return -1;
}
if (!ftp_putcmd(ftp, "MDTM", sizeof("MDTM")-1, path, path_len)) {
return -1;
}
if (!ftp_getresp(ftp) || ftp->resp != 213) {
return -1;
}
/* parse out the timestamp */
for (ptr = ftp->inbuf; *ptr && !isdigit(*ptr); ptr++);
n = sscanf(ptr, "%4d%2d%2d%2d%2d%2d", &tm.tm_year, &tm.tm_mon, &tm.tm_mday, &tm.tm_hour, &tm.tm_min, &tm.tm_sec);
if (n != 6) {
return -1;
}
tm.tm_year -= 1900;
tm.tm_mon--;
tm.tm_isdst = -1;
/* figure out the GMT offset */
stamp = time(NULL);
gmt = php_gmtime_r(&stamp, &tmbuf);
if (!gmt) {
return -1;
}
gmt->tm_isdst = -1;
/* apply the GMT offset */
tm.tm_sec += stamp - mktime(gmt);
tm.tm_isdst = gmt->tm_isdst;
stamp = mktime(&tm);
return stamp;
}
/* }}} */
/* {{{ ftp_delete */
int
ftp_delete(ftpbuf_t *ftp, const char *path, const size_t path_len)
{
if (ftp == NULL) {
return 0;
}
if (!ftp_putcmd(ftp, "DELE", sizeof("DELE")-1, path, path_len)) {
return 0;
}
if (!ftp_getresp(ftp) || ftp->resp != 250) {
return 0;
}
return 1;
}
/* }}} */
/* {{{ ftp_rename */
int
ftp_rename(ftpbuf_t *ftp, const char *src, const size_t src_len, const char *dest, const size_t dest_len)
{
if (ftp == NULL) {
return 0;
}
if (!ftp_putcmd(ftp, "RNFR", sizeof("RNFR")-1, src, src_len)) {
return 0;
}
if (!ftp_getresp(ftp) || ftp->resp != 350) {
return 0;
}
if (!ftp_putcmd(ftp, "RNTO", sizeof("RNTO")-1, dest, dest_len)) {
return 0;
}
if (!ftp_getresp(ftp) || ftp->resp != 250) {
return 0;
}
return 1;
}
/* }}} */
/* {{{ ftp_site */
int
ftp_site(ftpbuf_t *ftp, const char *cmd, const size_t cmd_len)
{
if (ftp == NULL) {
return 0;
}
if (!ftp_putcmd(ftp, "SITE", sizeof("SITE")-1, cmd, cmd_len)) {
return 0;
}
if (!ftp_getresp(ftp) || ftp->resp < 200 || ftp->resp >= 300) {
return 0;
}
return 1;
}
/* }}} */
/* static functions */
/* {{{ ftp_putcmd */
int
ftp_putcmd(ftpbuf_t *ftp, const char *cmd, const size_t cmd_len, const char *args, const size_t args_len)
{
int size;
char *data;
if (strpbrk(cmd, "\r\n")) {
return 0;
}
/* build the output buffer */
if (args && args[0]) {
/* "cmd args\r\n\0" */
if (cmd_len + args_len + 4 > FTP_BUFSIZE) {
return 0;
}
if (strpbrk(args, "\r\n")) {
return 0;
}
size = slprintf(ftp->outbuf, sizeof(ftp->outbuf), "%s %s\r\n", cmd, args);
} else {
/* "cmd\r\n\0" */
if (cmd_len + 3 > FTP_BUFSIZE) {
return 0;
}
size = slprintf(ftp->outbuf, sizeof(ftp->outbuf), "%s\r\n", cmd);
}
data = ftp->outbuf;
/* Clear the inbuf and extra-lines buffer */
ftp->inbuf[0] = '\0';
ftp->extra = NULL;
if (my_send(ftp, ftp->fd, data, size) != size) {
return 0;
}
return 1;
}
/* }}} */
/* {{{ ftp_readline */
int
ftp_readline(ftpbuf_t *ftp)
{
long size, rcvd;
char *data, *eol;
/* shift the extra to the front */
size = FTP_BUFSIZE;
rcvd = 0;
if (ftp->extra) {
memmove(ftp->inbuf, ftp->extra, ftp->extralen);
rcvd = ftp->extralen;
}
data = ftp->inbuf;
do {
size -= rcvd;
for (eol = data; rcvd; rcvd--, eol++) {
if (*eol == '\r') {
*eol = 0;
ftp->extra = eol + 1;
if (rcvd > 1 && *(eol + 1) == '\n') {
ftp->extra++;
rcvd--;
}
if ((ftp->extralen = --rcvd) == 0) {
ftp->extra = NULL;
}
return 1;
} else if (*eol == '\n') {
*eol = 0;
ftp->extra = eol + 1;
if ((ftp->extralen = --rcvd) == 0) {
ftp->extra = NULL;
}
return 1;
}
}
data = eol;
if ((rcvd = my_recv(ftp, ftp->fd, data, size)) < 1) {
*data = 0;
return 0;
}
} while (size);
*data = 0;
return 0;
}
/* }}} */
/* {{{ ftp_getresp */
int
ftp_getresp(ftpbuf_t *ftp)
{
if (ftp == NULL) {
return 0;
}
ftp->resp = 0;
while (1) {
if (!ftp_readline(ftp)) {
return 0;
}
/* Break out when the end-tag is found */
if (isdigit(ftp->inbuf[0]) && isdigit(ftp->inbuf[1]) && isdigit(ftp->inbuf[2]) && ftp->inbuf[3] == ' ') {
break;
}
}
/* translate the tag */
if (!isdigit(ftp->inbuf[0]) || !isdigit(ftp->inbuf[1]) || !isdigit(ftp->inbuf[2])) {
return 0;
}
ftp->resp = 100 * (ftp->inbuf[0] - '0') + 10 * (ftp->inbuf[1] - '0') + (ftp->inbuf[2] - '0');
memmove(ftp->inbuf, ftp->inbuf + 4, FTP_BUFSIZE - 4);
if (ftp->extra) {
ftp->extra -= 4;
}
return 1;
}
/* }}} */
int single_send(ftpbuf_t *ftp, php_socket_t s, void *buf, size_t size) {
#ifdef HAVE_FTP_SSL
int err;
bool retry = 0;
SSL *handle = NULL;
php_socket_t fd;
size_t sent;
if (ftp->use_ssl && ftp->fd == s && ftp->ssl_active) {
handle = ftp->ssl_handle;
fd = ftp->fd;
} else if (ftp->use_ssl && ftp->fd != s && ftp->use_ssl_for_data && ftp->data->ssl_active) {
handle = ftp->data->ssl_handle;
fd = ftp->data->fd;
} else {
return send(s, buf, size, 0);
}
do {
sent = SSL_write(handle, buf, size);
err = SSL_get_error(handle, sent);
switch (err) {
case SSL_ERROR_NONE:
retry = 0;
break;
case SSL_ERROR_ZERO_RETURN:
retry = 0;
SSL_shutdown(handle);
break;
case SSL_ERROR_WANT_READ:
case SSL_ERROR_WANT_CONNECT: {
php_pollfd p;
int i;
p.fd = fd;
p.events = POLLOUT;
p.revents = 0;
i = php_poll2(&p, 1, 300);
retry = i > 0;
}
break;
default:
php_error_docref(NULL, E_WARNING, "SSL write failed");
return -1;
}
} while (retry);
return sent;
#else
return send(s, buf, size, 0);
#endif
}
/* {{{ my_send */
int
my_send(ftpbuf_t *ftp, php_socket_t s, void *buf, size_t len)
{
zend_long size, sent;
int n;
size = len;
while (size) {
n = php_pollfd_for_ms(s, POLLOUT, ftp->timeout_sec * 1000);
if (n < 1) {
char buf[256];
if (n == 0) {
#ifdef PHP_WIN32
_set_errno(ETIMEDOUT);
#else
errno = ETIMEDOUT;
#endif
}
php_error_docref(NULL, E_WARNING, "%s", php_socket_strerror(errno, buf, sizeof buf));
return -1;
}
sent = single_send(ftp, s, buf, size);
if (sent == -1) {
return -1;
}
buf = (char*) buf + sent;
size -= sent;
}
return len;
}
/* }}} */
/* {{{ my_recv */
int
my_recv(ftpbuf_t *ftp, php_socket_t s, void *buf, size_t len)
{
int n, nr_bytes;
#ifdef HAVE_FTP_SSL
int err;
bool retry = 0;
SSL *handle = NULL;
php_socket_t fd;
#endif
n = php_pollfd_for_ms(s, PHP_POLLREADABLE, ftp->timeout_sec * 1000);
if (n < 1) {
char buf[256];
if (n == 0) {
#ifdef PHP_WIN32
_set_errno(ETIMEDOUT);
#else
errno = ETIMEDOUT;
#endif
}
php_error_docref(NULL, E_WARNING, "%s", php_socket_strerror(errno, buf, sizeof buf));
return -1;
}
#ifdef HAVE_FTP_SSL
if (ftp->use_ssl && ftp->fd == s && ftp->ssl_active) {
handle = ftp->ssl_handle;
fd = ftp->fd;
} else if (ftp->use_ssl && ftp->fd != s && ftp->use_ssl_for_data && ftp->data->ssl_active) {
handle = ftp->data->ssl_handle;
fd = ftp->data->fd;
}
if (handle) {
do {
nr_bytes = SSL_read(handle, buf, len);
err = SSL_get_error(handle, nr_bytes);
switch (err) {
case SSL_ERROR_NONE:
retry = 0;
break;
case SSL_ERROR_ZERO_RETURN:
retry = 0;
SSL_shutdown(handle);
break;
case SSL_ERROR_WANT_READ:
case SSL_ERROR_WANT_CONNECT: {
php_pollfd p;
int i;
p.fd = fd;
p.events = POLLIN|POLLPRI;
p.revents = 0;
i = php_poll2(&p, 1, 300);
retry = i > 0;
}
break;
default:
php_error_docref(NULL, E_WARNING, "SSL read failed");
return -1;
}
} while (retry);
} else {
#endif
nr_bytes = recv(s, buf, len, 0);
#ifdef HAVE_FTP_SSL
}
#endif
return (nr_bytes);
}
/* }}} */
/* {{{ data_available */
int
data_available(ftpbuf_t *ftp, php_socket_t s)
{
int n;
n = php_pollfd_for_ms(s, PHP_POLLREADABLE, 1000);
if (n < 1) {
char buf[256];
if (n == 0) {
#ifdef PHP_WIN32
_set_errno(ETIMEDOUT);
#else
errno = ETIMEDOUT;
#endif
}
php_error_docref(NULL, E_WARNING, "%s", php_socket_strerror(errno, buf, sizeof buf));
return 0;
}
return 1;
}
/* }}} */
/* {{{ data_writeable */
int
data_writeable(ftpbuf_t *ftp, php_socket_t s)
{
int n;
n = php_pollfd_for_ms(s, POLLOUT, 1000);
if (n < 1) {
char buf[256];
if (n == 0) {
#ifdef PHP_WIN32
_set_errno(ETIMEDOUT);
#else
errno = ETIMEDOUT;
#endif
}
php_error_docref(NULL, E_WARNING, "%s", php_socket_strerror(errno, buf, sizeof buf));
return 0;
}
return 1;
}
/* }}} */
/* {{{ my_accept */
int
my_accept(ftpbuf_t *ftp, php_socket_t s, struct sockaddr *addr, socklen_t *addrlen)
{
int n;
n = php_pollfd_for_ms(s, PHP_POLLREADABLE, ftp->timeout_sec * 1000);
if (n < 1) {
char buf[256];
if (n == 0) {
#ifdef PHP_WIN32
_set_errno(ETIMEDOUT);
#else
errno = ETIMEDOUT;
#endif
}
php_error_docref(NULL, E_WARNING, "%s", php_socket_strerror(errno, buf, sizeof buf));
return -1;
}
return accept(s, addr, addrlen);
}
/* }}} */
/* {{{ ftp_getdata */
databuf_t*
ftp_getdata(ftpbuf_t *ftp)
{
int fd = -1;
databuf_t *data;
php_sockaddr_storage addr;
struct sockaddr *sa;
socklen_t size;
union ipbox ipbox;
char arg[sizeof("255, 255, 255, 255, 255, 255")];
struct timeval tv;
int arg_len;
/* ask for a passive connection if we need one */
if (ftp->pasv && !ftp_pasv(ftp, 1)) {
return NULL;
}
/* alloc the data structure */
data = ecalloc(1, sizeof(*data));
data->listener = -1;
data->fd = -1;
data->type = ftp->type;
sa = (struct sockaddr *) &ftp->localaddr;
/* bind/listen */
if ((fd = socket(sa->sa_family, SOCK_STREAM, 0)) == SOCK_ERR) {
php_error_docref(NULL, E_WARNING, "socket() failed: %s (%d)", strerror(errno), errno);
goto bail;
}
/* passive connection handler */
if (ftp->pasv) {
/* clear the ready status */
ftp->pasv = 1;
/* connect */
/* Win 95/98 seems not to like size > sizeof(sockaddr_in) */
size = php_sockaddr_size(&ftp->pasvaddr);
tv.tv_sec = ftp->timeout_sec;
tv.tv_usec = 0;
if (php_connect_nonb(fd, (struct sockaddr*) &ftp->pasvaddr, size, &tv) == -1) {
php_error_docref(NULL, E_WARNING, "php_connect_nonb() failed: %s (%d)", strerror(errno), errno);
goto bail;
}
data->fd = fd;
ftp->data = data;
return data;
}
/* active (normal) connection */
/* bind to a local address */
php_any_addr(sa->sa_family, &addr, 0);
size = php_sockaddr_size(&addr);
if (bind(fd, (struct sockaddr*) &addr, size) != 0) {
php_error_docref(NULL, E_WARNING, "bind() failed: %s (%d)", strerror(errno), errno);
goto bail;
}
if (getsockname(fd, (struct sockaddr*) &addr, &size) != 0) {
php_error_docref(NULL, E_WARNING, "getsockname() failed: %s (%d)", strerror(errno), errno);
goto bail;
}
if (listen(fd, 5) != 0) {
php_error_docref(NULL, E_WARNING, "listen() failed: %s (%d)", strerror(errno), errno);
goto bail;
}
data->listener = fd;
#if defined(HAVE_IPV6) && defined(HAVE_INET_NTOP)
if (sa->sa_family == AF_INET6) {
/* need to use EPRT */
char eprtarg[INET6_ADDRSTRLEN + sizeof("|x||xxxxx|")];
char out[INET6_ADDRSTRLEN];
int eprtarg_len;
inet_ntop(AF_INET6, &((struct sockaddr_in6*) sa)->sin6_addr, out, sizeof(out));
eprtarg_len = snprintf(eprtarg, sizeof(eprtarg), "|2|%s|%hu|", out, ntohs(((struct sockaddr_in6 *) &addr)->sin6_port));
if (eprtarg_len < 0) {
goto bail;
}
if (!ftp_putcmd(ftp, "EPRT", sizeof("EPRT")-1, eprtarg, eprtarg_len)) {
goto bail;
}
if (!ftp_getresp(ftp) || ftp->resp != 200) {
goto bail;
}
ftp->data = data;
return data;
}
#endif
/* send the PORT */
ipbox.ia[0] = ((struct sockaddr_in*) sa)->sin_addr;
ipbox.s[2] = ((struct sockaddr_in*) &addr)->sin_port;
arg_len = snprintf(arg, sizeof(arg), "%u,%u,%u,%u,%u,%u", ipbox.c[0], ipbox.c[1], ipbox.c[2], ipbox.c[3], ipbox.c[4], ipbox.c[5]);
if (arg_len < 0) {
goto bail;
}
if (!ftp_putcmd(ftp, "PORT", sizeof("PORT")-1, arg, arg_len)) {
goto bail;
}
if (!ftp_getresp(ftp) || ftp->resp != 200) {
goto bail;
}
ftp->data = data;
return data;
bail:
if (fd != -1) {
closesocket(fd);
}
efree(data);
return NULL;
}
/* }}} */
/* {{{ data_accept */
databuf_t*
data_accept(databuf_t *data, ftpbuf_t *ftp)
{
php_sockaddr_storage addr;
socklen_t size;
#ifdef HAVE_FTP_SSL
SSL_CTX *ctx;
SSL_SESSION *session;
int err, res;
bool retry;
#endif
if (data->fd != -1) {
goto data_accepted;
}
size = sizeof(addr);
data->fd = my_accept(ftp, data->listener, (struct sockaddr*) &addr, &size);
closesocket(data->listener);
data->listener = -1;
if (data->fd == -1) {
efree(data);
return NULL;
}
data_accepted:
#ifdef HAVE_FTP_SSL
/* now enable ssl if we need to */
if (ftp->use_ssl && ftp->use_ssl_for_data) {
ctx = SSL_get_SSL_CTX(ftp->ssl_handle);
if (ctx == NULL) {
php_error_docref(NULL, E_WARNING, "data_accept: failed to retrieve the existing SSL context");
return 0;
}
data->ssl_handle = SSL_new(ctx);
if (data->ssl_handle == NULL) {
php_error_docref(NULL, E_WARNING, "data_accept: failed to create the SSL handle");
return 0;
}
SSL_set_fd(data->ssl_handle, data->fd);
if (ftp->old_ssl) {
SSL_copy_session_id(data->ssl_handle, ftp->ssl_handle);
}
/* get the session from the control connection so we can re-use it */
session = ftp->last_ssl_session;
if (session == NULL) {
php_error_docref(NULL, E_WARNING, "data_accept: failed to retrieve the existing SSL session");
SSL_free(data->ssl_handle);
return 0;
}
/* and set it on the data connection */
SSL_set_app_data(data->ssl_handle, ftp); /* Needed for ftp_ssl_new_session_cb */
res = SSL_set_session(data->ssl_handle, session);
if (res == 0) {
php_error_docref(NULL, E_WARNING, "data_accept: failed to set the existing SSL session");
SSL_free(data->ssl_handle);
return 0;
}
do {
res = SSL_connect(data->ssl_handle);
err = SSL_get_error(data->ssl_handle, res);
switch (err) {
case SSL_ERROR_NONE:
retry = 0;
break;
case SSL_ERROR_ZERO_RETURN:
retry = 0;
SSL_shutdown(data->ssl_handle);
break;
case SSL_ERROR_WANT_READ:
case SSL_ERROR_WANT_WRITE: {
php_pollfd p;
int i;
p.fd = data->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, "data_accept: SSL/TLS handshake failed");
SSL_shutdown(data->ssl_handle);
SSL_free(data->ssl_handle);
return 0;
}
} while (retry);
data->ssl_active = 1;
}
#endif
return data;
}
/* }}} */
/* {{{ ftp_ssl_shutdown */
#ifdef HAVE_FTP_SSL
static void ftp_ssl_shutdown(ftpbuf_t *ftp, php_socket_t fd, SSL *ssl_handle) {
/* In TLS 1.3 it's common to receive session tickets after the handshake has completed. We need to train
the socket (read the tickets until EOF/close_notify alert) before closing the socket. Otherwise the
server might get an ECONNRESET which might lead to data truncation on server side.
*/
char buf[256]; /* We will use this for the OpenSSL error buffer, so it has
to be at least 256 bytes long.*/
int done = 1, err, nread;
unsigned long sslerror;
err = SSL_shutdown(ssl_handle);
if (err < 0) {
php_error_docref(NULL, E_WARNING, "SSL_shutdown failed");
}
else if (err == 0) {
/* The shutdown is not yet finished. Call SSL_read() to do a bidirectional shutdown. */
done = 0;
}
while (!done && data_available(ftp, fd)) {
ERR_clear_error();
nread = SSL_read(ssl_handle, buf, sizeof(buf));
if (nread <= 0) {
err = SSL_get_error(ssl_handle, nread);
switch (err) {
case SSL_ERROR_NONE: /* this is not an error */
case SSL_ERROR_ZERO_RETURN: /* no more data */
/* This is the expected response. There was no data but only
the close notify alert */
done = 1;
break;
case SSL_ERROR_WANT_READ:
/* there's data pending, re-invoke SSL_read() */
break;
case SSL_ERROR_WANT_WRITE:
/* SSL wants a write. Really odd. Let's bail out. */
done = 1;
break;
case SSL_ERROR_SYSCALL:
/* most likely the peer closed the connection without
sending a close_notify shutdown alert;
bail out to avoid raising a spurious warning */
done = 1;
break;
default:
if ((sslerror = ERR_get_error())) {
ERR_error_string_n(sslerror, buf, sizeof(buf));
php_error_docref(NULL, E_WARNING, "SSL_read on shutdown: %s", buf);
} else if (errno) {
php_error_docref(NULL, E_WARNING, "SSL_read on shutdown: %s (%d)", strerror(errno), errno);
}
done = 1;
break;
}
}
}
(void)SSL_free(ssl_handle);
}
#endif
/* }}} */
/* {{{ data_close */
databuf_t*
data_close(ftpbuf_t *ftp, databuf_t *data)
{
if (data == NULL) {
return NULL;
}
if (data->listener != -1) {
#ifdef HAVE_FTP_SSL
if (data->ssl_active) {
/* don't free the data context, it's the same as the control */
ftp_ssl_shutdown(ftp, data->listener, data->ssl_handle);
data->ssl_active = 0;
}
#endif
closesocket(data->listener);
}
if (data->fd != -1) {
#ifdef HAVE_FTP_SSL
if (data->ssl_active) {
/* don't free the data context, it's the same as the control */
ftp_ssl_shutdown(ftp, data->fd, data->ssl_handle);
data->ssl_active = 0;
}
#endif
closesocket(data->fd);
}
if (ftp) {
ftp->data = NULL;
}
efree(data);
return NULL;
}
/* }}} */
/* {{{ ftp_genlist */
char**
ftp_genlist(ftpbuf_t *ftp, const char *cmd, const size_t cmd_len, const char *path, const size_t path_len)
{
php_stream *tmpstream = NULL;
databuf_t *data = NULL;
char *ptr;
int ch, lastch;
size_t size, rcvd;
size_t lines;
char **ret = NULL;
char **entry;
char *text;
if ((tmpstream = php_stream_fopen_tmpfile()) == NULL) {
php_error_docref(NULL, E_WARNING, "Unable to create temporary file. Check permissions in temporary files directory.");
return NULL;
}
if (!ftp_type(ftp, FTPTYPE_ASCII)) {
goto bail;
}
if ((data = ftp_getdata(ftp)) == NULL) {
goto bail;
}
ftp->data = data;
if (!ftp_putcmd(ftp, cmd, cmd_len, path, path_len)) {
goto bail;
}
if (!ftp_getresp(ftp) || (ftp->resp != 150 && ftp->resp != 125 && ftp->resp != 226)) {
goto bail;
}
/* some servers don't open a ftp-data connection if the directory is empty */
if (ftp->resp == 226) {
ftp->data = data_close(ftp, data);
php_stream_close(tmpstream);
return ecalloc(1, sizeof(char*));
}
/* pull data buffer into tmpfile */
if ((data = data_accept(data, ftp)) == NULL) {
goto bail;
}
size = 0;
lines = 0;
lastch = 0;
while ((rcvd = my_recv(ftp, data->fd, data->buf, FTP_BUFSIZE))) {
if (rcvd == (size_t)-1 || rcvd > ((size_t)(-1))-size) {
goto bail;
}
php_stream_write(tmpstream, data->buf, rcvd);
size += rcvd;
for (ptr = data->buf; rcvd; rcvd--, ptr++) {
if (*ptr == '\n' && lastch == '\r') {
lines++;
}
lastch = *ptr;
}
}
ftp->data = data_close(ftp, data);
php_stream_rewind(tmpstream);
ret = safe_emalloc((lines + 1), sizeof(char*), size);
entry = ret;
text = (char*) (ret + lines + 1);
*entry = text;
lastch = 0;
while ((ch = php_stream_getc(tmpstream)) != EOF) {
if (ch == '\n' && lastch == '\r') {
*(text - 1) = 0;
*++entry = text;
} else {
*text++ = ch;
}
lastch = ch;
}
*entry = NULL;
php_stream_close(tmpstream);
if (!ftp_getresp(ftp) || (ftp->resp != 226 && ftp->resp != 250)) {
efree(ret);
return NULL;
}
return ret;
bail:
ftp->data = data_close(ftp, data);
php_stream_close(tmpstream);
if (ret)
efree(ret);
return NULL;
}
/* }}} */
/* {{{ ftp_nb_get */
int
ftp_nb_get(ftpbuf_t *ftp, php_stream *outstream, const char *path, const size_t path_len, ftptype_t type, zend_long resumepos)
{
databuf_t *data = NULL;
char arg[MAX_LENGTH_OF_LONG];
if (ftp == NULL) {
return PHP_FTP_FAILED;
}
if (ftp->data != NULL) {
/* If there is a transfer in action, abort it.
* If we don't, we get an invalid state and memory leaks when the new connection gets opened. */
data_close(ftp, ftp->data);
if (!ftp_getresp(ftp) || (ftp->resp != 226 && ftp->resp != 250)) {
goto bail;
}
}
if (!ftp_type(ftp, type)) {
goto bail;
}
if ((data = ftp_getdata(ftp)) == NULL) {
goto bail;
}
if (resumepos>0) {
int arg_len = snprintf(arg, sizeof(arg), ZEND_LONG_FMT, resumepos);
if (arg_len < 0) {
goto bail;
}
if (!ftp_putcmd(ftp, "REST", sizeof("REST")-1, arg, arg_len)) {
goto bail;
}
if (!ftp_getresp(ftp) || (ftp->resp != 350)) {
goto bail;
}
}
if (!ftp_putcmd(ftp, "RETR", sizeof("RETR")-1, path, path_len)) {
goto bail;
}
if (!ftp_getresp(ftp) || (ftp->resp != 150 && ftp->resp != 125)) {
goto bail;
}
if ((data = data_accept(data, ftp)) == NULL) {
goto bail;
}
ftp->data = data;
ftp->stream = outstream;
ftp->lastch = 0;
ftp->nb = 1;
return (ftp_nb_continue_read(ftp));
bail:
ftp->data = data_close(ftp, data);
return PHP_FTP_FAILED;
}
/* }}} */
/* {{{ ftp_nb_continue_read */
int
ftp_nb_continue_read(ftpbuf_t *ftp)
{
databuf_t *data = NULL;
char *ptr;
int lastch;
size_t rcvd;
ftptype_t type;
data = ftp->data;
/* check if there is already more data */
if (!data_available(ftp, data->fd)) {
return PHP_FTP_MOREDATA;
}
type = ftp->type;
lastch = ftp->lastch;
if ((rcvd = my_recv(ftp, data->fd, data->buf, FTP_BUFSIZE))) {
if (rcvd == (size_t)-1) {
goto bail;
}
if (type == FTPTYPE_ASCII) {
for (ptr = data->buf; rcvd; rcvd--, ptr++) {
if (lastch == '\r' && *ptr != '\n') {
php_stream_putc(ftp->stream, '\r');
}
if (*ptr != '\r') {
php_stream_putc(ftp->stream, *ptr);
}
lastch = *ptr;
}
} else if (rcvd != php_stream_write(ftp->stream, data->buf, rcvd)) {
goto bail;
}
ftp->lastch = lastch;
return PHP_FTP_MOREDATA;
}
if (type == FTPTYPE_ASCII && lastch == '\r') {
php_stream_putc(ftp->stream, '\r');
}
ftp->data = data = data_close(ftp, data);
if (!ftp_getresp(ftp) || (ftp->resp != 226 && ftp->resp != 250)) {
goto bail;
}
ftp->nb = 0;
return PHP_FTP_FINISHED;
bail:
ftp->nb = 0;
ftp->data = data_close(ftp, data);
return PHP_FTP_FAILED;
}
/* }}} */
/* {{{ ftp_nb_put */
int
ftp_nb_put(ftpbuf_t *ftp, const char *path, const size_t path_len, php_stream *instream, ftptype_t type, zend_long startpos)
{
databuf_t *data = NULL;
char arg[MAX_LENGTH_OF_LONG];
if (ftp == NULL) {
return 0;
}
if (!ftp_type(ftp, type)) {
goto bail;
}
if ((data = ftp_getdata(ftp)) == NULL) {
goto bail;
}
if (startpos > 0) {
int arg_len = snprintf(arg, sizeof(arg), ZEND_LONG_FMT, startpos);
if (arg_len < 0) {
goto bail;
}
if (!ftp_putcmd(ftp, "REST", sizeof("REST")-1, arg, arg_len)) {
goto bail;
}
if (!ftp_getresp(ftp) || (ftp->resp != 350)) {
goto bail;
}
}
if (!ftp_putcmd(ftp, "STOR", sizeof("STOR")-1, path, path_len)) {
goto bail;
}
if (!ftp_getresp(ftp) || (ftp->resp != 150 && ftp->resp != 125)) {
goto bail;
}
if ((data = data_accept(data, ftp)) == NULL) {
goto bail;
}
ftp->data = data;
ftp->stream = instream;
ftp->lastch = 0;
ftp->nb = 1;
return (ftp_nb_continue_write(ftp));
bail:
ftp->data = data_close(ftp, data);
return PHP_FTP_FAILED;
}
/* }}} */
/* {{{ ftp_nb_continue_write */
int
ftp_nb_continue_write(ftpbuf_t *ftp)
{
long size;
char *ptr;
int ch;
/* check if we can write more data */
if (!data_writeable(ftp, ftp->data->fd)) {
return PHP_FTP_MOREDATA;
}
size = 0;
ptr = ftp->data->buf;
while (!php_stream_eof(ftp->stream) && (ch = php_stream_getc(ftp->stream)) != EOF) {
if (ch == '\n' && ftp->type == FTPTYPE_ASCII) {
*ptr++ = '\r';
size++;
}
*ptr++ = ch;
size++;
/* flush if necessary */
if (FTP_BUFSIZE - size < 2) {
if (my_send(ftp, ftp->data->fd, ftp->data->buf, size) != size) {
goto bail;
}
return PHP_FTP_MOREDATA;
}
}
if (size && my_send(ftp, ftp->data->fd, ftp->data->buf, size) != size) {
goto bail;
}
ftp->data = data_close(ftp, ftp->data);
if (!ftp_getresp(ftp) || (ftp->resp != 226 && ftp->resp != 250)) {
goto bail;
}
ftp->nb = 0;
return PHP_FTP_FINISHED;
bail:
ftp->data = data_close(ftp, ftp->data);
ftp->nb = 0;
return PHP_FTP_FAILED;
}
/* }}} */
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