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Copy pathsftp.c
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3458 lines (2987 loc) · 88.3 KB
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/*
* sftp.c - Secure FTP functions
*
* This file is part of the SSH Library
*
* Copyright (c) 2005-2008 by Aris Adamantiadis
* Copyright (c) 2008-2018 by Andreas Schneider <asn@cryptomilk.org>
*
* The SSH Library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or (at your
* option) any later version.
*
* The SSH Library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with the SSH Library; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
* MA 02111-1307, USA.
*/
/* This file contains code written by Nick Zitzmann */
#include "config.h"
#include <stdbool.h>
#include <errno.h>
#include <ctype.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdint.h>
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#endif /* HAVE_SYS_TIME_H */
#include <sys/types.h>
#include <sys/stat.h>
#include <limits.h>
#ifndef _WIN32
#include <netinet/in.h>
#include <arpa/inet.h>
#endif
#include "libssh/priv.h"
#include "libssh/ssh2.h"
#include "libssh/sftp.h"
#include "libssh/sftp_priv.h"
#include "libssh/buffer.h"
#include "libssh/channels.h"
#include "libssh/session.h"
#include "libssh/misc.h"
#include "libssh/bytearray.h"
#ifdef WITH_SFTP
/* Buffer size maximum is 256M */
#define SFTP_PACKET_SIZE_MAX 0x10000000
#define SFTP_BUFFER_SIZE_MAX 16384
struct sftp_ext_struct {
uint32_t count;
char **name;
char **data;
};
/* functions */
static int sftp_enqueue(sftp_session session, sftp_message msg);
static void sftp_message_free(sftp_message msg);
static void sftp_set_error(sftp_session sftp, int errnum);
static void status_msg_free(sftp_status_message status);
static sftp_ext sftp_ext_new(void) {
sftp_ext ext;
ext = calloc(1, sizeof(struct sftp_ext_struct));
if (ext == NULL) {
return NULL;
}
return ext;
}
static void sftp_ext_free(sftp_ext ext)
{
size_t i;
if (ext == NULL) {
return;
}
if (ext->count > 0) {
if (ext->name != NULL) {
for (i = 0; i < ext->count; i++) {
SAFE_FREE(ext->name[i]);
}
SAFE_FREE(ext->name);
}
if (ext->data != NULL) {
for (i = 0; i < ext->count; i++) {
SAFE_FREE(ext->data[i]);
}
SAFE_FREE(ext->data);
}
}
SAFE_FREE(ext);
}
sftp_session sftp_new(ssh_session session)
{
sftp_session sftp;
if (session == NULL) {
return NULL;
}
sftp = calloc(1, sizeof(struct sftp_session_struct));
if (sftp == NULL) {
ssh_set_error_oom(session);
return NULL;
}
sftp->ext = sftp_ext_new();
if (sftp->ext == NULL) {
ssh_set_error_oom(session);
goto error;
}
sftp->read_packet = calloc(1, sizeof(struct sftp_packet_struct));
if (sftp->read_packet == NULL) {
ssh_set_error_oom(session);
goto error;
}
sftp->read_packet->payload = ssh_buffer_new();
if (sftp->read_packet->payload == NULL) {
ssh_set_error_oom(session);
goto error;
}
sftp->session = session;
sftp->channel = ssh_channel_new(session);
if (sftp->channel == NULL) {
ssh_set_error_oom(session);
goto error;
}
if (ssh_channel_open_session(sftp->channel)) {
goto error;
}
if (ssh_channel_request_sftp(sftp->channel)) {
goto error;
}
return sftp;
error:
if (sftp->ext != NULL) {
sftp_ext_free(sftp->ext);
}
if (sftp->channel != NULL) {
ssh_channel_free(sftp->channel);
}
if (sftp->read_packet != NULL) {
if (sftp->read_packet->payload != NULL) {
SSH_BUFFER_FREE(sftp->read_packet->payload);
}
SAFE_FREE(sftp->read_packet);
}
SAFE_FREE(sftp);
return NULL;
}
sftp_session
sftp_new_channel(ssh_session session, ssh_channel channel)
{
sftp_session sftp = NULL;
if (session == NULL) {
return NULL;
}
sftp = calloc(1, sizeof(struct sftp_session_struct));
if (sftp == NULL) {
ssh_set_error_oom(session);
return NULL;
}
sftp->ext = sftp_ext_new();
if (sftp->ext == NULL) {
ssh_set_error_oom(session);
goto error;
}
sftp->read_packet = calloc(1, sizeof(struct sftp_packet_struct));
if (sftp->read_packet == NULL) {
ssh_set_error_oom(session);
goto error;
}
sftp->read_packet->payload = ssh_buffer_new();
if (sftp->read_packet->payload == NULL) {
ssh_set_error_oom(session);
goto error;
}
sftp->session = session;
sftp->channel = channel;
return sftp;
error:
if (sftp->ext != NULL) {
sftp_ext_free(sftp->ext);
}
if (sftp->read_packet != NULL) {
if (sftp->read_packet->payload != NULL) {
SSH_BUFFER_FREE(sftp->read_packet->payload);
}
SAFE_FREE(sftp->read_packet);
}
SAFE_FREE(sftp);
return NULL;
}
#ifdef WITH_SERVER
sftp_session sftp_server_new(ssh_session session, ssh_channel chan){
sftp_session sftp = NULL;
sftp = calloc(1, sizeof(struct sftp_session_struct));
if (sftp == NULL) {
ssh_set_error_oom(session);
return NULL;
}
sftp->read_packet = calloc(1, sizeof(struct sftp_packet_struct));
if (sftp->read_packet == NULL) {
goto error;
}
sftp->read_packet->payload = ssh_buffer_new();
if (sftp->read_packet->payload == NULL) {
goto error;
}
sftp->session = session;
sftp->channel = chan;
return sftp;
error:
ssh_set_error_oom(session);
if (sftp->read_packet != NULL) {
if (sftp->read_packet->payload != NULL) {
SSH_BUFFER_FREE(sftp->read_packet->payload);
}
SAFE_FREE(sftp->read_packet);
}
SAFE_FREE(sftp);
return NULL;
}
int sftp_server_init(sftp_session sftp){
ssh_session session = sftp->session;
sftp_packet packet = NULL;
ssh_buffer reply = NULL;
uint32_t version;
int rc;
packet = sftp_packet_read(sftp);
if (packet == NULL) {
return -1;
}
if (packet->type != SSH_FXP_INIT) {
ssh_set_error(session, SSH_FATAL,
"Packet read of type %d instead of SSH_FXP_INIT",
packet->type);
return -1;
}
SSH_LOG(SSH_LOG_PACKET, "Received SSH_FXP_INIT");
ssh_buffer_get_u32(packet->payload, &version);
version = ntohl(version);
SSH_LOG(SSH_LOG_PACKET, "Client version: %d", version);
sftp->client_version = (int)version;
reply = ssh_buffer_new();
if (reply == NULL) {
ssh_set_error_oom(session);
return -1;
}
rc = ssh_buffer_pack(reply, "dssss",
LIBSFTP_VERSION,
"posix-rename@openssh.com",
"1",
"hardlink@openssh.com",
"1");
if (rc != SSH_OK) {
ssh_set_error_oom(session);
SSH_BUFFER_FREE(reply);
return -1;
}
if (sftp_packet_write(sftp, SSH_FXP_VERSION, reply) < 0) {
SSH_BUFFER_FREE(reply);
return -1;
}
SSH_BUFFER_FREE(reply);
SSH_LOG(SSH_LOG_PROTOCOL, "Server version sent");
if (version > LIBSFTP_VERSION) {
sftp->version = LIBSFTP_VERSION;
} else {
sftp->version = (int)version;
}
return 0;
}
void sftp_server_free(sftp_session sftp)
{
sftp_request_queue ptr;
if (sftp == NULL) {
return;
}
ptr = sftp->queue;
while(ptr) {
sftp_request_queue old;
sftp_message_free(ptr->message);
old = ptr->next;
SAFE_FREE(ptr);
ptr = old;
}
SAFE_FREE(sftp->handles);
SSH_BUFFER_FREE(sftp->read_packet->payload);
SAFE_FREE(sftp->read_packet);
sftp_ext_free(sftp->ext);
SAFE_FREE(sftp);
}
#endif /* WITH_SERVER */
void sftp_free(sftp_session sftp)
{
sftp_request_queue ptr;
if (sftp == NULL) {
return;
}
if (sftp->channel != NULL) {
ssh_channel_send_eof(sftp->channel);
ptr = sftp->queue;
while(ptr) {
sftp_request_queue old;
sftp_message_free(ptr->message);
old = ptr->next;
SAFE_FREE(ptr);
ptr = old;
}
ssh_channel_free(sftp->channel);
sftp->channel = NULL;
}
SAFE_FREE(sftp->handles);
SSH_BUFFER_FREE(sftp->read_packet->payload);
SAFE_FREE(sftp->read_packet);
sftp_ext_free(sftp->ext);
SAFE_FREE(sftp);
}
ssize_t sftp_packet_write(sftp_session sftp, uint8_t type, ssh_buffer payload)
{
uint8_t header[5] = {0};
uint32_t payload_size;
ssize_t size;
int rc;
/* Add size of type */
payload_size = ssh_buffer_get_len(payload) + sizeof(uint8_t);
PUSH_BE_U32(header, 0, payload_size);
PUSH_BE_U8(header, 4, type);
rc = ssh_buffer_prepend_data(payload, header, sizeof(header));
if (rc < 0) {
ssh_set_error_oom(sftp->session);
sftp_set_error(sftp, SSH_FX_FAILURE);
return -1;
}
size = ssh_channel_write(sftp->channel,
ssh_buffer_get(payload),
ssh_buffer_get_len(payload));
if (size < 0) {
sftp_set_error(sftp, SSH_FX_FAILURE);
return -1;
}
if ((uint32_t)size != ssh_buffer_get_len(payload)) {
SSH_LOG(SSH_LOG_PACKET,
"Had to write %d bytes, wrote only %zd",
ssh_buffer_get_len(payload),
size);
}
return size;
}
sftp_packet sftp_packet_read(sftp_session sftp)
{
uint8_t buffer[SFTP_BUFFER_SIZE_MAX];
sftp_packet packet = sftp->read_packet;
uint32_t size;
int nread;
bool is_eof;
int rc;
packet->sftp = sftp;
/*
* If the packet has a payload, then just reinit the buffer, otherwise
* allocate a new one.
*/
if (packet->payload != NULL) {
rc = ssh_buffer_reinit(packet->payload);
if (rc != 0) {
ssh_set_error_oom(sftp->session);
sftp_set_error(sftp, SSH_FX_FAILURE);
return NULL;
}
} else {
packet->payload = ssh_buffer_new();
if (packet->payload == NULL) {
ssh_set_error_oom(sftp->session);
sftp_set_error(sftp, SSH_FX_FAILURE);
return NULL;
}
}
nread = 0;
do {
int s;
// read from channel until 4 bytes have been read or an error occurs
s = ssh_channel_read(sftp->channel, buffer + nread, 4 - nread, 0);
if (s < 0) {
goto error;
} else if (s == 0) {
is_eof = ssh_channel_is_eof(sftp->channel);
if (is_eof) {
ssh_set_error(sftp->session,
SSH_FATAL,
"Received EOF while reading sftp packet size");
sftp_set_error(sftp, SSH_FX_EOF);
goto error;
}
} else {
nread += s;
}
} while (nread < 4);
size = PULL_BE_U32(buffer, 0);
if (size == 0 || size > SFTP_PACKET_SIZE_MAX) {
ssh_set_error(sftp->session, SSH_FATAL, "Invalid sftp packet size!");
sftp_set_error(sftp, SSH_FX_FAILURE);
goto error;
}
do {
nread = ssh_channel_read(sftp->channel, buffer, 1, 0);
if (nread < 0) {
goto error;
} else if (nread == 0) {
is_eof = ssh_channel_is_eof(sftp->channel);
if (is_eof) {
ssh_set_error(sftp->session,
SSH_FATAL,
"Received EOF while reading sftp packet type");
sftp_set_error(sftp, SSH_FX_EOF);
goto error;
}
}
} while (nread < 1);
packet->type = buffer[0];
/* Remove the packet type size */
size -= sizeof(uint8_t);
nread = ssh_buffer_allocate_size(packet->payload, size);
if (nread < 0) {
ssh_set_error_oom(sftp->session);
sftp_set_error(sftp, SSH_FX_FAILURE);
goto error;
}
while (size > 0 && size < SFTP_PACKET_SIZE_MAX) {
nread = ssh_channel_read(sftp->channel,
buffer,
sizeof(buffer) > size ? size : sizeof(buffer),
0);
if (nread < 0) {
/* TODO: check if there are cases where an error needs to be set here */
goto error;
}
if (nread > 0) {
rc = ssh_buffer_add_data(packet->payload, buffer, nread);
if (rc != 0) {
ssh_set_error_oom(sftp->session);
sftp_set_error(sftp, SSH_FX_FAILURE);
goto error;
}
} else { /* nread == 0 */
/* Retry the reading unless the remote was closed */
is_eof = ssh_channel_is_eof(sftp->channel);
if (is_eof) {
ssh_set_error(sftp->session,
SSH_REQUEST_DENIED,
"Received EOF while reading sftp packet");
sftp_set_error(sftp, SSH_FX_EOF);
goto error;
}
}
size -= nread;
}
return packet;
error:
ssh_buffer_reinit(packet->payload);
return NULL;
}
static void sftp_set_error(sftp_session sftp, int errnum) {
if (sftp != NULL) {
sftp->errnum = errnum;
}
}
/* Get the last sftp error */
int sftp_get_error(sftp_session sftp) {
if (sftp == NULL) {
return -1;
}
return sftp->errnum;
}
static void sftp_message_free(sftp_message msg)
{
if (msg == NULL) {
return;
}
SSH_BUFFER_FREE(msg->payload);
SAFE_FREE(msg);
}
static sftp_message sftp_get_message(sftp_packet packet)
{
sftp_session sftp = packet->sftp;
sftp_message msg = NULL;
int rc;
switch(packet->type) {
case SSH_FXP_STATUS:
case SSH_FXP_HANDLE:
case SSH_FXP_DATA:
case SSH_FXP_ATTRS:
case SSH_FXP_NAME:
case SSH_FXP_EXTENDED_REPLY:
break;
default:
ssh_set_error(packet->sftp->session,
SSH_FATAL,
"Unknown packet type %d",
packet->type);
sftp_set_error(packet->sftp, SSH_FX_FAILURE);
return NULL;
}
msg = calloc(1, sizeof(struct sftp_message_struct));
if (msg == NULL) {
ssh_set_error_oom(sftp->session);
sftp_set_error(packet->sftp, SSH_FX_FAILURE);
return NULL;
}
msg->sftp = packet->sftp;
msg->packet_type = packet->type;
/* Move the payload from the packet to the message */
msg->payload = packet->payload;
packet->payload = NULL;
rc = ssh_buffer_unpack(msg->payload, "d", &msg->id);
if (rc != SSH_OK) {
ssh_set_error(packet->sftp->session, SSH_FATAL,
"Invalid packet %d: no ID", packet->type);
sftp_message_free(msg);
sftp_set_error(packet->sftp, SSH_FX_FAILURE);
return NULL;
}
SSH_LOG(SSH_LOG_PACKET,
"Packet with id %d type %d",
msg->id,
msg->packet_type);
return msg;
}
static int sftp_read_and_dispatch(sftp_session sftp)
{
sftp_packet packet = NULL;
sftp_message msg = NULL;
packet = sftp_packet_read(sftp);
if (packet == NULL) {
/* something nasty happened reading the packet */
return -1;
}
msg = sftp_get_message(packet);
if (msg == NULL) {
return -1;
}
if (sftp_enqueue(sftp, msg) < 0) {
sftp_message_free(msg);
return -1;
}
return 0;
}
void sftp_packet_free(sftp_packet packet)
{
if (packet == NULL) {
return;
}
SSH_BUFFER_FREE(packet->payload);
free(packet);
}
/* Initialize the sftp session with the server. */
int sftp_init(sftp_session sftp) {
sftp_packet packet = NULL;
ssh_buffer buffer = NULL;
char *ext_name = NULL;
char *ext_data = NULL;
uint32_t version;
int rc;
buffer = ssh_buffer_new();
if (buffer == NULL) {
ssh_set_error_oom(sftp->session);
sftp_set_error(sftp, SSH_FX_FAILURE);
return -1;
}
rc = ssh_buffer_pack(buffer, "d", LIBSFTP_VERSION);
if (rc != SSH_OK) {
ssh_set_error_oom(sftp->session);
SSH_BUFFER_FREE(buffer);
sftp_set_error(sftp, SSH_FX_FAILURE);
return -1;
}
if (sftp_packet_write(sftp, SSH_FXP_INIT, buffer) < 0) {
SSH_BUFFER_FREE(buffer);
return -1;
}
SSH_BUFFER_FREE(buffer);
packet = sftp_packet_read(sftp);
if (packet == NULL) {
return -1;
}
if (packet->type != SSH_FXP_VERSION) {
ssh_set_error(sftp->session, SSH_FATAL,
"Received a %d messages instead of SSH_FXP_VERSION", packet->type);
return -1;
}
/* TODO: are we sure there are 4 bytes ready? */
rc = ssh_buffer_unpack(packet->payload, "d", &version);
if (rc != SSH_OK){
sftp_set_error(sftp, SSH_FX_FAILURE);
return -1;
}
SSH_LOG(SSH_LOG_PROTOCOL,
"SFTP server version %d",
version);
rc = ssh_buffer_unpack(packet->payload, "s", &ext_name);
while (rc == SSH_OK) {
uint32_t count = sftp->ext->count;
char **tmp;
rc = ssh_buffer_unpack(packet->payload, "s", &ext_data);
if (rc == SSH_ERROR) {
break;
}
SSH_LOG(SSH_LOG_PROTOCOL,
"SFTP server extension: %s, version: %s",
ext_name, ext_data);
count++;
tmp = realloc(sftp->ext->name, count * sizeof(char *));
if (tmp == NULL) {
ssh_set_error_oom(sftp->session);
SAFE_FREE(ext_name);
SAFE_FREE(ext_data);
sftp_set_error(sftp, SSH_FX_FAILURE);
return -1;
}
tmp[count - 1] = ext_name;
sftp->ext->name = tmp;
tmp = realloc(sftp->ext->data, count * sizeof(char *));
if (tmp == NULL) {
ssh_set_error_oom(sftp->session);
SAFE_FREE(ext_name);
SAFE_FREE(ext_data);
sftp_set_error(sftp, SSH_FX_FAILURE);
return -1;
}
tmp[count - 1] = ext_data;
sftp->ext->data = tmp;
sftp->ext->count = count;
rc = ssh_buffer_unpack(packet->payload, "s", &ext_name);
}
sftp->version = sftp->server_version = (int)version;
return 0;
}
unsigned int sftp_extensions_get_count(sftp_session sftp) {
if (sftp == NULL || sftp->ext == NULL) {
return 0;
}
return sftp->ext->count;
}
const char *sftp_extensions_get_name(sftp_session sftp, unsigned int idx) {
if (sftp == NULL)
return NULL;
if (sftp->ext == NULL || sftp->ext->name == NULL) {
ssh_set_error_invalid(sftp->session);
return NULL;
}
if (idx > sftp->ext->count) {
ssh_set_error_invalid(sftp->session);
return NULL;
}
return sftp->ext->name[idx];
}
const char *sftp_extensions_get_data(sftp_session sftp, unsigned int idx) {
if (sftp == NULL)
return NULL;
if (sftp->ext == NULL || sftp->ext->name == NULL) {
ssh_set_error_invalid(sftp->session);
return NULL;
}
if (idx > sftp->ext->count) {
ssh_set_error_invalid(sftp->session);
return NULL;
}
return sftp->ext->data[idx];
}
int sftp_extension_supported(sftp_session sftp, const char *name,
const char *data) {
size_t i, n;
if (sftp == NULL || name == NULL || data == NULL) {
return 0;
}
n = sftp_extensions_get_count(sftp);
for (i = 0; i < n; i++) {
const char *ext_name = sftp_extensions_get_name(sftp, i);
const char *ext_data = sftp_extensions_get_data(sftp, i);
if (ext_name != NULL && ext_data != NULL &&
strcmp(ext_name, name) == 0 &&
strcmp(ext_data, data) == 0) {
return 1;
}
}
return 0;
}
static sftp_request_queue request_queue_new(sftp_message msg) {
sftp_request_queue queue = NULL;
queue = calloc(1, sizeof(struct sftp_request_queue_struct));
if (queue == NULL) {
ssh_set_error_oom(msg->sftp->session);
sftp_set_error(msg->sftp, SSH_FX_FAILURE);
return NULL;
}
queue->message = msg;
return queue;
}
static void request_queue_free(sftp_request_queue queue) {
if (queue == NULL) {
return;
}
ZERO_STRUCTP(queue);
SAFE_FREE(queue);
}
static int sftp_enqueue(sftp_session sftp, sftp_message msg) {
sftp_request_queue queue = NULL;
sftp_request_queue ptr;
queue = request_queue_new(msg);
if (queue == NULL) {
return -1;
}
SSH_LOG(SSH_LOG_PACKET,
"Queued msg id %d type %d",
msg->id, msg->packet_type);
if(sftp->queue == NULL) {
sftp->queue = queue;
} else {
ptr = sftp->queue;
while(ptr->next) {
ptr=ptr->next; /* find end of linked list */
}
ptr->next = queue; /* add it on bottom */
}
return 0;
}
/*
* Pulls of a message from the queue based on the ID.
* Returns NULL if no message has been found.
*/
static sftp_message sftp_dequeue(sftp_session sftp, uint32_t id){
sftp_request_queue prev = NULL;
sftp_request_queue queue;
sftp_message msg;
if(sftp->queue == NULL) {
return NULL;
}
queue = sftp->queue;
while (queue) {
if(queue->message->id == id) {
/* remove from queue */
if (prev == NULL) {
sftp->queue = queue->next;
} else {
prev->next = queue->next;
}
msg = queue->message;
request_queue_free(queue);
SSH_LOG(SSH_LOG_PACKET,
"Dequeued msg id %d type %d",
msg->id,
msg->packet_type);
return msg;
}
prev = queue;
queue = queue->next;
}
return NULL;
}
/*
* Assigns a new SFTP ID for new requests and assures there is no collision
* between them.
* Returns a new ID ready to use in a request
*/
static inline uint32_t sftp_get_new_id(sftp_session session) {
return ++session->id_counter;
}
static sftp_status_message parse_status_msg(sftp_message msg){
sftp_status_message status;
int rc;
if (msg->packet_type != SSH_FXP_STATUS) {
ssh_set_error(msg->sftp->session, SSH_FATAL,
"Not a ssh_fxp_status message passed in!");
sftp_set_error(msg->sftp, SSH_FX_BAD_MESSAGE);
return NULL;
}
status = calloc(1, sizeof(struct sftp_status_message_struct));
if (status == NULL) {
ssh_set_error_oom(msg->sftp->session);
sftp_set_error(msg->sftp, SSH_FX_FAILURE);
return NULL;
}
status->id = msg->id;
rc = ssh_buffer_unpack(msg->payload, "d",
&status->status);
if (rc != SSH_OK){
SAFE_FREE(status);
ssh_set_error(msg->sftp->session, SSH_FATAL,
"Invalid SSH_FXP_STATUS message");
sftp_set_error(msg->sftp, SSH_FX_FAILURE);
return NULL;
}
rc = ssh_buffer_unpack(msg->payload, "ss",
&status->errormsg,
&status->langmsg);
if(rc != SSH_OK && msg->sftp->version >=3){
/* These are mandatory from version 3 */
SAFE_FREE(status);
ssh_set_error(msg->sftp->session, SSH_FATAL,
"Invalid SSH_FXP_STATUS message");
sftp_set_error(msg->sftp, SSH_FX_FAILURE);
return NULL;
}
if (status->errormsg == NULL)
status->errormsg = strdup("No error message in packet");
if (status->langmsg == NULL)
status->langmsg = strdup("");
if (status->errormsg == NULL || status->langmsg == NULL) {
ssh_set_error_oom(msg->sftp->session);
sftp_set_error(msg->sftp, SSH_FX_FAILURE);
status_msg_free(status);
return NULL;
}
return status;
}
static void status_msg_free(sftp_status_message status){
if (status == NULL) {
return;
}
SAFE_FREE(status->errormsg);
SAFE_FREE(status->langmsg);
SAFE_FREE(status);
}
static sftp_file parse_handle_msg(sftp_message msg){
sftp_file file;
if(msg->packet_type != SSH_FXP_HANDLE) {
ssh_set_error(msg->sftp->session, SSH_FATAL,
"Not a ssh_fxp_handle message passed in!");
return NULL;
}
file = calloc(1, sizeof(struct sftp_file_struct));
if (file == NULL) {
ssh_set_error_oom(msg->sftp->session);
sftp_set_error(msg->sftp, SSH_FX_FAILURE);
return NULL;
}
file->handle = ssh_buffer_get_ssh_string(msg->payload);