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Update libssh2 to 1.11.1

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This commit is contained in:
dmiller
2025-04-14 17:20:50 +00:00
parent 58ef6f6dac
commit 2bc341de52
118 changed files with 11071 additions and 4234 deletions
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262
libssh2/src/packet.c
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@@ -1,7 +1,7 @@
/* Copyright (c) 2004-2007, Sara Golemon <sarag@libssh2.org>
* Copyright (c) 2005,2006 Mikhail Gusarov
* Copyright (c) 2009-2014 by Daniel Stenberg
* Copyright (c) 2010 Simon Josefsson
/* Copyright (C) Sara Golemon <sarag@libssh2.org>
* Copyright (C) Mikhail Gusarov
* Copyright (C) Daniel Stenberg
* Copyright (C) Simon Josefsson
* All rights reserved.
*
* Redistribution and use in source and binary forms,
@@ -36,6 +36,8 @@
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
* USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include "libssh2_priv.h"
@@ -69,14 +71,14 @@ packet_queue_listener(LIBSSH2_SESSION * session, unsigned char *data,
* Look for a matching listener
*/
/* 17 = packet_type(1) + channel(4) + reason(4) + descr(4) + lang(4) */
size_t packet_len = 17 + (sizeof(FwdNotReq) - 1);
size_t packet_len = 17 + strlen(FwdNotReq);
unsigned char *p;
LIBSSH2_LISTENER *listn = _libssh2_list_first(&session->listeners);
char failure_code = SSH_OPEN_ADMINISTRATIVELY_PROHIBITED;
int rc;
if(listen_state->state == libssh2_NB_state_idle) {
size_t offset = (sizeof("forwarded-tcpip") - 1) + 5;
size_t offset = strlen("forwarded-tcpip") + 5;
size_t temp_len = 0;
struct string_buf buf;
buf.data = data;
@@ -124,7 +126,7 @@ packet_queue_listener(LIBSSH2_SESSION * session, unsigned char *data,
}
_libssh2_debug((session, LIBSSH2_TRACE_CONN,
"Remote received connection from %s:%ld to %s:%ld",
"Remote received connection from %s:%u to %s:%u",
listen_state->shost, listen_state->sport,
listen_state->host, listen_state->port));
@@ -135,8 +137,8 @@ packet_queue_listener(LIBSSH2_SESSION * session, unsigned char *data,
while(listn) {
if((listn->port == (int) listen_state->port) &&
(strlen(listn->host) == listen_state->host_len) &&
(memcmp (listn->host, listen_state->host,
listen_state->host_len) == 0)) {
(memcmp(listn->host, listen_state->host,
listen_state->host_len) == 0)) {
/* This is our listener */
LIBSSH2_CHANNEL *channel = NULL;
listen_state->channel = NULL;
@@ -164,7 +166,7 @@ packet_queue_listener(LIBSSH2_SESSION * session, unsigned char *data,
listen_state->channel = channel;
channel->session = session;
channel->channel_type_len = sizeof("forwarded-tcpip") - 1;
channel->channel_type_len = strlen("forwarded-tcpip");
channel->channel_type = LIBSSH2_ALLOC(session,
channel->
channel_type_len +
@@ -197,8 +199,8 @@ packet_queue_listener(LIBSSH2_SESSION * session, unsigned char *data,
channel->local.packet_size = listen_state->packet_size;
_libssh2_debug((session, LIBSSH2_TRACE_CONN,
"Connection queued: channel %lu/%lu "
"win %lu/%lu packet %lu/%lu",
"Connection queued: channel %u/%u "
"win %u/%u packet %u/%u",
channel->local.id, channel->remote.id,
channel->local.window_size,
channel->remote.window_size,
@@ -251,7 +253,7 @@ packet_queue_listener(LIBSSH2_SESSION * session, unsigned char *data,
*(p++) = SSH_MSG_CHANNEL_OPEN_FAILURE;
_libssh2_store_u32(&p, listen_state->sender_channel);
_libssh2_store_u32(&p, failure_code);
_libssh2_store_str(&p, FwdNotReq, sizeof(FwdNotReq) - 1);
_libssh2_store_str(&p, FwdNotReq, strlen(FwdNotReq));
_libssh2_htonu32(p, 0);
rc = _libssh2_transport_send(session, listen_state->packet,
@@ -280,14 +282,14 @@ packet_x11_open(LIBSSH2_SESSION * session, unsigned char *data,
{
int failure_code = SSH_OPEN_CONNECT_FAILED;
/* 17 = packet_type(1) + channel(4) + reason(4) + descr(4) + lang(4) */
size_t packet_len = 17 + (sizeof(X11FwdUnAvil) - 1);
size_t packet_len = 17 + strlen(X11FwdUnAvil);
unsigned char *p;
LIBSSH2_CHANNEL *channel = x11open_state->channel;
int rc;
if(x11open_state->state == libssh2_NB_state_idle) {
size_t offset = (sizeof("x11") - 1) + 5;
size_t offset = strlen("x11") + 5;
size_t temp_len = 0;
struct string_buf buf;
buf.data = data;
@@ -337,7 +339,7 @@ packet_x11_open(LIBSSH2_SESSION * session, unsigned char *data,
}
_libssh2_debug((session, LIBSSH2_TRACE_CONN,
"X11 Connection Received from %s:%ld on channel %lu",
"X11 Connection Received from %s:%u on channel %u",
x11open_state->shost, x11open_state->sport,
x11open_state->sender_channel));
@@ -355,7 +357,7 @@ packet_x11_open(LIBSSH2_SESSION * session, unsigned char *data,
}
channel->session = session;
channel->channel_type_len = sizeof("x11") - 1;
channel->channel_type_len = strlen("x11");
channel->channel_type = LIBSSH2_ALLOC(session,
channel->channel_type_len +
1);
@@ -382,8 +384,8 @@ packet_x11_open(LIBSSH2_SESSION * session, unsigned char *data,
channel->local.packet_size = x11open_state->packet_size;
_libssh2_debug((session, LIBSSH2_TRACE_CONN,
"X11 Connection established: channel %lu/%lu "
"win %lu/%lu packet %lu/%lu",
"X11 Connection established: channel %u/%u "
"win %u/%u packet %u/%u",
channel->local.id, channel->remote.id,
channel->local.window_size,
channel->remote.window_size,
@@ -434,7 +436,7 @@ x11_exit:
*(p++) = SSH_MSG_CHANNEL_OPEN_FAILURE;
_libssh2_store_u32(&p, x11open_state->sender_channel);
_libssh2_store_u32(&p, failure_code);
_libssh2_store_str(&p, X11FwdUnAvil, sizeof(X11FwdUnAvil) - 1);
_libssh2_store_str(&p, X11FwdUnAvil, strlen(X11FwdUnAvil));
_libssh2_htonu32(p, 0);
rc = _libssh2_transport_send(session, x11open_state->packet, packet_len,
@@ -462,23 +464,40 @@ packet_authagent_open(LIBSSH2_SESSION * session,
{
int failure_code = SSH_OPEN_CONNECT_FAILED;
/* 17 = packet_type(1) + channel(4) + reason(4) + descr(4) + lang(4) */
size_t packet_len = 17 + (sizeof(X11FwdUnAvil) - 1);
size_t packet_len = 17 + strlen(X11FwdUnAvil);
unsigned char *p;
LIBSSH2_CHANNEL *channel = authagent_state->channel;
int rc;
struct string_buf buf;
size_t offset = strlen("auth-agent@openssh.org") + 5;
(void)datalen;
buf.data = data;
buf.dataptr = buf.data;
buf.len = datalen;
buf.dataptr += offset;
if(datalen < offset) {
return _libssh2_error(session, LIBSSH2_ERROR_OUT_OF_BOUNDARY,
"Unexpected packet size");
}
if(authagent_state->state == libssh2_NB_state_idle) {
unsigned char *s = data + (sizeof("auth-agent@openssh.org") - 1) + 5;
authagent_state->sender_channel = _libssh2_ntohu32(s);
s += 4;
authagent_state->initial_window_size = _libssh2_ntohu32(s);
s += 4;
authagent_state->packet_size = _libssh2_ntohu32(s);
if(_libssh2_get_u32(&buf, &(authagent_state->sender_channel))) {
return _libssh2_error(session, LIBSSH2_ERROR_BUFFER_TOO_SMALL,
"Data too short extracting channel");
}
if(_libssh2_get_u32(&buf, &(authagent_state->initial_window_size))) {
return _libssh2_error(session, LIBSSH2_ERROR_BUFFER_TOO_SMALL,
"Data too short extracting window size");
}
if(_libssh2_get_u32(&buf, &(authagent_state->packet_size))) {
return _libssh2_error(session, LIBSSH2_ERROR_BUFFER_TOO_SMALL,
"Data too short extracting packet");
}
_libssh2_debug((session, LIBSSH2_TRACE_CONN,
"Auth Agent Connection Received on channel %lu",
"Auth Agent Connection Received on channel %u",
authagent_state->sender_channel));
authagent_state->state = libssh2_NB_state_allocated;
@@ -498,7 +517,7 @@ packet_authagent_open(LIBSSH2_SESSION * session,
memset(channel, 0, sizeof(LIBSSH2_CHANNEL));
channel->session = session;
channel->channel_type_len = sizeof("auth agent") - 1;
channel->channel_type_len = strlen("auth agent");
channel->channel_type = LIBSSH2_ALLOC(session,
channel->channel_type_len +
1);
@@ -526,7 +545,7 @@ packet_authagent_open(LIBSSH2_SESSION * session,
_libssh2_debug((session, LIBSSH2_TRACE_CONN,
"Auth Agent Connection established: channel "
"%lu/%lu win %lu/%lu packet %lu/%lu",
"%u/%u win %u/%u packet %u/%u",
channel->local.id, channel->remote.id,
channel->local.window_size,
channel->remote.window_size,
@@ -582,7 +601,7 @@ authagent_exit:
*(p++) = SSH_MSG_CHANNEL_OPEN_FAILURE;
_libssh2_store_u32(&p, authagent_state->sender_channel);
_libssh2_store_u32(&p, failure_code);
_libssh2_store_str(&p, AuthAgentUnavail, sizeof(AuthAgentUnavail) - 1);
_libssh2_store_str(&p, AuthAgentUnavail, strlen(AuthAgentUnavail));
_libssh2_htonu32(p, 0);
rc = _libssh2_transport_send(session, authagent_state->packet, packet_len,
@@ -605,14 +624,13 @@ authagent_exit:
* layer when it has received a packet.
*
* The input pointer 'data' is pointing to allocated data that this function
* is asked to deal with so on failure OR success, it must be freed fine.
* The only exception is when the return code is LIBSSH2_ERROR_EAGAIN.
* will be freed unless return the code is LIBSSH2_ERROR_EAGAIN.
*
* This function will always be called with 'datalen' greater than zero.
*/
int
_libssh2_packet_add(LIBSSH2_SESSION * session, unsigned char *data,
size_t datalen, int macstate)
size_t datalen, int macstate, uint32_t seq)
{
int rc = 0;
unsigned char *message = NULL;
@@ -626,8 +644,8 @@ _libssh2_packet_add(LIBSSH2_SESSION * session, unsigned char *data,
switch(session->packAdd_state) {
case libssh2_NB_state_idle:
_libssh2_debug((session, LIBSSH2_TRACE_TRANS,
"Packet type %d received, length=%d",
(int) msg, (int) datalen));
"Packet type %u received, length=%ld",
(unsigned int) msg, (long) datalen));
if((macstate == LIBSSH2_MAC_INVALID) &&
(!session->macerror ||
@@ -657,6 +675,70 @@ _libssh2_packet_add(LIBSSH2_SESSION * session, unsigned char *data,
break;
}
if(session->state & LIBSSH2_STATE_INITIAL_KEX) {
if(msg == SSH_MSG_KEXINIT) {
if(!session->kex_strict) {
if(datalen < 17) {
LIBSSH2_FREE(session, data);
session->packAdd_state = libssh2_NB_state_idle;
return _libssh2_error(session,
LIBSSH2_ERROR_BUFFER_TOO_SMALL,
"Data too short extracting kex");
}
else {
const unsigned char *strict =
(unsigned char *)"kex-strict-s-v00@openssh.com";
struct string_buf buf;
unsigned char *algs = NULL;
size_t algs_len = 0;
buf.data = (unsigned char *)data;
buf.dataptr = buf.data;
buf.len = datalen;
buf.dataptr += 17; /* advance past type and cookie */
if(_libssh2_get_string(&buf, &algs, &algs_len)) {
LIBSSH2_FREE(session, data);
session->packAdd_state = libssh2_NB_state_idle;
return _libssh2_error(session,
LIBSSH2_ERROR_BUFFER_TOO_SMALL,
"Algs too short");
}
if(algs_len == 0 ||
_libssh2_kex_agree_instr(algs, algs_len, strict, 28)) {
session->kex_strict = 1;
}
}
}
if(session->kex_strict && seq) {
LIBSSH2_FREE(session, data);
session->socket_state = LIBSSH2_SOCKET_DISCONNECTED;
session->packAdd_state = libssh2_NB_state_idle;
libssh2_session_disconnect(session, "strict KEX violation: "
"KEXINIT was not the first packet");
return _libssh2_error(session, LIBSSH2_ERROR_SOCKET_DISCONNECT,
"strict KEX violation: "
"KEXINIT was not the first packet");
}
}
if(session->kex_strict && session->fullpacket_required_type &&
session->fullpacket_required_type != msg) {
LIBSSH2_FREE(session, data);
session->socket_state = LIBSSH2_SOCKET_DISCONNECTED;
session->packAdd_state = libssh2_NB_state_idle;
libssh2_session_disconnect(session, "strict KEX violation: "
"unexpected packet type");
return _libssh2_error(session, LIBSSH2_ERROR_SOCKET_DISCONNECT,
"strict KEX violation: "
"unexpected packet type");
}
}
if(session->packAdd_state == libssh2_NB_state_allocated) {
/* A couple exceptions to the packet adding rule: */
switch(msg) {
@@ -793,7 +875,8 @@ _libssh2_packet_add(LIBSSH2_SESSION * session, unsigned char *data,
_libssh2_debug((session,
LIBSSH2_TRACE_KEX,
"Server to Client extension %.*s: %.*s",
name_len, name, value_len, value));
(int)name_len, name,
(int)value_len, value));
}
if(name_len == 15 &&
@@ -841,7 +924,7 @@ _libssh2_packet_add(LIBSSH2_SESSION * session, unsigned char *data,
_libssh2_debug((session,
LIBSSH2_TRACE_CONN,
"Received global request type %.*s (wr %X)",
len, data + 5, want_reply));
(int)len, data + 5, want_reply));
}
@@ -870,7 +953,7 @@ libssh2_packet_add_jump_point5:
/* streamid(4) */
data_head += 4;
/* fall-through */
LIBSSH2_FALLTHROUGH();
/*
byte SSH_MSG_CHANNEL_DATA
@@ -901,8 +984,8 @@ libssh2_packet_add_jump_point5:
stream_id = _libssh2_ntohu32(data + 5);
_libssh2_debug((session, LIBSSH2_TRACE_CONN,
"%d bytes packet_add() for %lu/%lu/%lu",
(int) (datalen - data_head),
"%ld bytes packet_add() for %u/%u/%u",
(long) (datalen - data_head),
channelp->local.id,
channelp->remote.id,
stream_id));
@@ -915,8 +998,8 @@ libssh2_packet_add_jump_point5:
LIBSSH2_FREE(session, data);
_libssh2_debug((session, LIBSSH2_TRACE_CONN,
"Ignoring extended data and refunding %d bytes",
(int) (datalen - 13)));
"Ignoring extended data and refunding %ld bytes",
(long) (datalen - 13)));
if(channelp->read_avail + datalen - data_head >=
channelp->remote.window_size)
datalen = channelp->remote.window_size -
@@ -925,11 +1008,11 @@ libssh2_packet_add_jump_point5:
channelp->remote.window_size -= (uint32_t)(datalen -
data_head);
_libssh2_debug((session, LIBSSH2_TRACE_CONN,
"shrinking window size by %lu bytes to %lu, "
"read_avail %lu",
datalen - data_head,
"shrinking window size by %ld bytes to %u, "
"read_avail %ld",
(long) (datalen - data_head),
channelp->remote.window_size,
channelp->read_avail));
(long) channelp->read_avail));
session->packAdd_channelp = channelp;
@@ -991,10 +1074,10 @@ libssh2_packet_add_jump_point1:
channelp->read_avail += datalen - data_head;
_libssh2_debug((session, LIBSSH2_TRACE_CONN,
"increasing read_avail by %lu bytes to %lu/%lu",
"increasing read_avail by %ld bytes to %ld/%u",
(long)(datalen - data_head),
(long)channelp->read_avail,
(long)channelp->remote.window_size));
channelp->remote.window_size));
break;
@@ -1014,7 +1097,7 @@ libssh2_packet_add_jump_point1:
else {
_libssh2_debug((session,
LIBSSH2_TRACE_CONN,
"EOF received for channel %lu/%lu",
"EOF received for channel %u/%u",
channelp->local.id,
channelp->remote.id));
channelp->remote.eof = 1;
@@ -1042,43 +1125,45 @@ libssh2_packet_add_jump_point1:
_libssh2_debug((session,
LIBSSH2_TRACE_CONN,
"Channel %d received request type %.*s (wr %X)",
channel, len, data + 9, want_reply));
"Channel %u received request type %.*s (wr %X)",
channel, (int)len, data + 9, want_reply));
if(len == sizeof("exit-status") - 1
&& (sizeof("exit-status") - 1 + 9) <= datalen
if(len == strlen("exit-status")
&& (strlen("exit-status") + 9) <= datalen
&& !memcmp("exit-status", data + 9,
sizeof("exit-status") - 1)) {
strlen("exit-status"))) {
/* we've got "exit-status" packet. Set the session value */
if(datalen >= 20)
channelp =
_libssh2_channel_locate(session, channel);
if(channelp && (sizeof("exit-status") + 13) <= datalen) {
if(channelp && (strlen("exit-status") + 14) <= datalen) {
channelp->exit_status =
_libssh2_ntohu32(data + 9 + sizeof("exit-status"));
_libssh2_ntohu32(data + 10 +
strlen("exit-status"));
_libssh2_debug((session, LIBSSH2_TRACE_CONN,
"Exit status %lu received for "
"channel %lu/%lu",
"Exit status %d received for "
"channel %u/%u",
channelp->exit_status,
channelp->local.id,
channelp->remote.id));
}
}
else if(len == sizeof("exit-signal") - 1
&& (sizeof("exit-signal") - 1 + 9) <= datalen
else if(len == strlen("exit-signal")
&& (strlen("exit-signal") + 9) <= datalen
&& !memcmp("exit-signal", data + 9,
sizeof("exit-signal") - 1)) {
strlen("exit-signal"))) {
/* command terminated due to signal */
if(datalen >= 20)
channelp = _libssh2_channel_locate(session, channel);
if(channelp && (sizeof("exit-signal") + 13) <= datalen) {
if(channelp && (strlen("exit-signal") + 14) <= datalen) {
/* set signal name (without SIG prefix) */
uint32_t namelen =
_libssh2_ntohu32(data + 9 + sizeof("exit-signal"));
_libssh2_ntohu32(data + 10 +
strlen("exit-signal"));
if(namelen <= UINT_MAX - 1) {
channelp->exit_signal =
@@ -1091,15 +1176,15 @@ libssh2_packet_add_jump_point1:
if(!channelp->exit_signal)
rc = _libssh2_error(session, LIBSSH2_ERROR_ALLOC,
"memory for signal name");
else if((sizeof("exit-signal") + 13 + namelen <=
else if((strlen("exit-signal") + 14 + namelen <=
datalen)) {
memcpy(channelp->exit_signal,
data + 13 + sizeof("exit-signal"), namelen);
data + 14 + strlen("exit-signal"), namelen);
channelp->exit_signal[namelen] = '\0';
/* TODO: save error message and language tag */
_libssh2_debug((session, LIBSSH2_TRACE_CONN,
"Exit signal %s received for "
"channel %lu/%lu",
"channel %u/%u",
channelp->exit_signal,
channelp->local.id,
channelp->remote.id));
@@ -1140,7 +1225,7 @@ libssh2_packet_add_jump_point4:
return 0;
}
_libssh2_debug((session, LIBSSH2_TRACE_CONN,
"Close received for channel %lu/%lu",
"Close received for channel %u/%u",
channelp->local.id,
channelp->remote.id));
@@ -1162,12 +1247,12 @@ libssh2_packet_add_jump_point4:
case SSH_MSG_CHANNEL_OPEN:
if(datalen < 17)
;
else if((datalen >= (sizeof("forwarded-tcpip") + 4)) &&
((sizeof("forwarded-tcpip") - 1) ==
else if((datalen >= (strlen("forwarded-tcpip") + 5)) &&
(strlen("forwarded-tcpip") ==
_libssh2_ntohu32(data + 1))
&&
(memcmp(data + 5, "forwarded-tcpip",
sizeof("forwarded-tcpip") - 1) == 0)) {
strlen("forwarded-tcpip")) == 0)) {
/* init the state struct */
memset(&session->packAdd_Qlstn_state, 0,
@@ -1178,9 +1263,9 @@ libssh2_packet_add_jump_point2:
rc = packet_queue_listener(session, data, datalen,
&session->packAdd_Qlstn_state);
}
else if((datalen >= (sizeof("x11") + 4)) &&
((sizeof("x11") - 1) == _libssh2_ntohu32(data + 1)) &&
(memcmp(data + 5, "x11", sizeof("x11") - 1) == 0)) {
else if((datalen >= (strlen("x11") + 5)) &&
((strlen("x11")) == _libssh2_ntohu32(data + 1)) &&
(memcmp(data + 5, "x11", strlen("x11")) == 0)) {
/* init the state struct */
memset(&session->packAdd_x11open_state, 0,
@@ -1191,11 +1276,11 @@ libssh2_packet_add_jump_point3:
rc = packet_x11_open(session, data, datalen,
&session->packAdd_x11open_state);
}
else if((datalen >= (sizeof("auth-agent@openssh.com") + 4)) &&
((sizeof("auth-agent@openssh.com") - 1) ==
else if((datalen >= (strlen("auth-agent@openssh.com") + 5)) &&
(strlen("auth-agent@openssh.com") ==
_libssh2_ntohu32(data + 1)) &&
(memcmp(data + 5, "auth-agent@openssh.com",
sizeof("auth-agent@openssh.com") - 1) == 0)) {
strlen("auth-agent@openssh.com")) == 0)) {
/* init the state struct */
memset(&session->packAdd_authagent_state, 0,
@@ -1230,8 +1315,8 @@ libssh2_packet_add_jump_authagent:
channelp->local.window_size += bytestoadd;
_libssh2_debug((session, LIBSSH2_TRACE_CONN,
"Window adjust for channel %lu/%lu, "
"adding %lu bytes, new window_size=%lu",
"Window adjust for channel %u/%u, "
"adding %u bytes, new window_size=%u",
channelp->local.id,
channelp->remote.id,
bytestoadd,
@@ -1323,7 +1408,8 @@ _libssh2_packet_ask(LIBSSH2_SESSION * session, unsigned char packet_type,
LIBSSH2_PACKET *packet = _libssh2_list_first(&session->packets);
_libssh2_debug((session, LIBSSH2_TRACE_TRANS,
"Looking for packet of type: %d", (int) packet_type));
"Looking for packet of type: %u",
(unsigned int)packet_type));
while(packet) {
if(packet->data[0] == packet_type
@@ -1341,6 +1427,15 @@ _libssh2_packet_ask(LIBSSH2_SESSION * session, unsigned char packet_type,
return 0;
}
else if(session->kex_strict &&
(session->state & LIBSSH2_STATE_INITIAL_KEX)) {
libssh2_session_disconnect(session, "strict KEX violation: "
"unexpected packet type");
return _libssh2_error(session, LIBSSH2_ERROR_SOCKET_DISCONNECT,
"strict KEX violation: "
"unexpected packet type");
}
packet = _libssh2_list_next(&packet->node);
}
return -1;
@@ -1402,7 +1497,10 @@ _libssh2_packet_require(LIBSSH2_SESSION * session, unsigned char packet_type,
}
while(session->socket_state == LIBSSH2_SOCKET_CONNECTED) {
int ret = _libssh2_transport_read(session);
int ret;
session->fullpacket_required_type = packet_type;
ret = _libssh2_transport_read(session);
session->fullpacket_required_type = 0;
if(ret == LIBSSH2_ERROR_EAGAIN)
return ret;
else if(ret < 0) {