mirror of https://github.com/sonertari/SSLproxy
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
743 lines
24 KiB
C
743 lines
24 KiB
C
/*-
|
|
* SSLsplit - transparent SSL/TLS interception
|
|
* https://www.roe.ch/SSLsplit
|
|
*
|
|
* Copyright (c) 2009-2018, Daniel Roethlisberger <daniel@roe.ch>.
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are met:
|
|
* 1. Redistributions of source code must retain the above copyright notice,
|
|
* this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright notice,
|
|
* this list of conditions and the following disclaimer in the documentation
|
|
* and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER AND CONTRIBUTORS ``AS IS''
|
|
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
|
|
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#include "protoautossl.h"
|
|
#include "prototcp.h"
|
|
#include "protossl.h"
|
|
|
|
#include "pxysslshut.h"
|
|
|
|
#include <string.h>
|
|
#include <sys/param.h>
|
|
#include <event2/bufferevent_ssl.h>
|
|
|
|
typedef struct protoautossl_ctx protoautossl_ctx_t;
|
|
|
|
struct protoautossl_ctx {
|
|
unsigned int clienthello_search : 1; /* 1 if waiting for hello */
|
|
unsigned int clienthello_found : 1; /* 1 if conn upgrade to SSL */
|
|
};
|
|
|
|
/*
|
|
* Peek into pending data to see if it is an SSL/TLS ClientHello, and if so,
|
|
* upgrade the connection from plain TCP to SSL/TLS.
|
|
*
|
|
* Return 1 if ClientHello was found and connection was upgraded to SSL/TLS,
|
|
* 0 otherwise.
|
|
*
|
|
* WARNING: This is experimental code and will need to be improved.
|
|
*
|
|
* TODO - enable search and skip bytes before ClientHello in case it does not
|
|
* start at offset 0 (i.e. chello > vec_out[0].iov_base)
|
|
* TODO - peek into more than just the current segment
|
|
* TODO - add retry mechanism for short truncated ClientHello, possibly generic
|
|
*/
|
|
static int NONNULL(1)
|
|
protoautossl_peek_and_upgrade(pxy_conn_ctx_t *ctx)
|
|
{
|
|
protoautossl_ctx_t *autossl_ctx = ctx->protoctx->arg;
|
|
|
|
struct evbuffer *inbuf;
|
|
struct evbuffer_iovec vec_out[1];
|
|
const unsigned char *chello;
|
|
|
|
if (OPTS_DEBUG(ctx->opts)) {
|
|
log_dbg_printf("Checking for a client hello\n");
|
|
}
|
|
|
|
#ifdef DEBUG_PROXY
|
|
log_dbg_level_printf(LOG_DBG_MODE_FINEST, "protoautossl_peek_and_upgrade: ENTER, fd=%d\n", ctx->fd);
|
|
#endif /* DEBUG_PROXY */
|
|
|
|
/* peek the buffer */
|
|
inbuf = bufferevent_get_input(ctx->src.bev);
|
|
if (evbuffer_peek(inbuf, 1024, 0, vec_out, 1)) {
|
|
if (ssl_tls_clienthello_parse(vec_out[0].iov_base, vec_out[0].iov_len, 0, &chello, &ctx->sslctx->sni) == 0) {
|
|
if (OPTS_DEBUG(ctx->opts)) {
|
|
log_dbg_printf("Peek found ClientHello\n");
|
|
}
|
|
|
|
// @attention We need srvdst ssl to setup src ssl, otherwise srvdst is closed asap
|
|
if (protossl_setup_srvdst_ssl(ctx) == -1) {
|
|
return -1;
|
|
}
|
|
if (protossl_setup_srvdst_new_bev_ssl_connecting(ctx) == -1) {
|
|
return -1;
|
|
}
|
|
|
|
#ifdef DEBUG_PROXY
|
|
log_dbg_level_printf(LOG_DBG_MODE_FINER, "protoautossl_peek_and_upgrade: Enabling srvdst, fd=%d\n", ctx->fd);
|
|
#endif /* DEBUG_PROXY */
|
|
|
|
bufferevent_setcb(ctx->srvdst.bev, pxy_bev_readcb, pxy_bev_writecb, pxy_bev_eventcb, ctx);
|
|
bufferevent_enable(ctx->srvdst.bev, EV_READ|EV_WRITE);
|
|
|
|
autossl_ctx->clienthello_search = 0;
|
|
autossl_ctx->clienthello_found = 1;
|
|
return 1;
|
|
} else {
|
|
if (OPTS_DEBUG(ctx->opts)) {
|
|
log_dbg_printf("Peek found no ClientHello\n");
|
|
}
|
|
return 0;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void NONNULL(1,2)
|
|
protoautossl_bufferevent_free_and_close_fd(struct bufferevent *bev, pxy_conn_ctx_t *ctx)
|
|
{
|
|
evutil_socket_t fd = bufferevent_getfd(bev);
|
|
|
|
#ifdef DEBUG_PROXY
|
|
log_dbg_level_printf(LOG_DBG_MODE_FINER, "protoautossl_bufferevent_free_and_close_fd: in=%zu, out=%zu, fd=%d\n",
|
|
evbuffer_get_length(bufferevent_get_input(bev)), evbuffer_get_length(bufferevent_get_output(bev)), fd);
|
|
#endif /* DEBUG_PROXY */
|
|
|
|
SSL *ssl = NULL;
|
|
|
|
protoautossl_ctx_t *autossl_ctx = ctx->protoctx->arg;
|
|
if (autossl_ctx->clienthello_found) {
|
|
ssl = bufferevent_openssl_get_ssl(bev); /* does not inc refc */
|
|
}
|
|
|
|
// @todo Check if we need to NULL all cbs?
|
|
// @see https://stackoverflow.com/questions/31688709/knowing-all-callbacks-have-run-with-libevent-and-bufferevent-free
|
|
//bufferevent_setcb(bev, NULL, NULL, NULL, NULL);
|
|
bufferevent_free(bev); /* does not free SSL unless the option BEV_OPT_CLOSE_ON_FREE was set */
|
|
if (ssl) {
|
|
pxy_ssl_shutdown(ctx->opts, ctx->evbase, ssl, fd);
|
|
} else {
|
|
evutil_closesocket(fd);
|
|
}
|
|
}
|
|
|
|
static void NONNULL(1)
|
|
protoautossl_conn_connect(pxy_conn_ctx_t *ctx)
|
|
{
|
|
#ifdef DEBUG_PROXY
|
|
log_dbg_level_printf(LOG_DBG_MODE_FINEST, "protoautossl_conn_connect: ENTER, fd=%d\n", ctx->fd);
|
|
#endif /* DEBUG_PROXY */
|
|
|
|
if (prototcp_setup_dst(ctx) == -1) {
|
|
return;
|
|
}
|
|
|
|
bufferevent_setcb(ctx->dst.bev, pxy_bev_readcb, pxy_bev_writecb, pxy_bev_eventcb, ctx);
|
|
bufferevent_enable(ctx->dst.bev, EV_READ|EV_WRITE);
|
|
|
|
/* create server-side socket and eventbuffer */
|
|
if (prototcp_setup_srvdst(ctx) == -1) {
|
|
return;
|
|
}
|
|
|
|
// Enable srvdst r cb for autossl mode
|
|
bufferevent_setcb(ctx->srvdst.bev, pxy_bev_readcb, pxy_bev_writecb, pxy_bev_eventcb, ctx);
|
|
bufferevent_enable(ctx->srvdst.bev, EV_READ|EV_WRITE);
|
|
|
|
/* initiate connection */
|
|
if (bufferevent_socket_connect(ctx->srvdst.bev, (struct sockaddr *)&ctx->addr, ctx->addrlen) == -1) {
|
|
log_err_level_printf(LOG_CRIT, "protoautossl_conn_connect: bufferevent_socket_connect for srvdst failed\n");
|
|
#ifdef DEBUG_PROXY
|
|
log_dbg_level_printf(LOG_DBG_MODE_FINE, "protoautossl_conn_connect: bufferevent_socket_connect for srvdst failed, fd=%d\n", ctx->fd);
|
|
#endif /* DEBUG_PROXY */
|
|
}
|
|
}
|
|
|
|
static void NONNULL(1)
|
|
protoautossl_connect_child(pxy_conn_child_ctx_t *ctx)
|
|
{
|
|
protoautossl_ctx_t *autossl_ctx = ctx->conn->protoctx->arg;
|
|
|
|
#ifdef DEBUG_PROXY
|
|
log_dbg_level_printf(LOG_DBG_MODE_FINEST, "protoautossl_connect_child: ENTER, child fd=%d, fd=%d\n", ctx->fd, ctx->conn->fd);
|
|
#endif /* DEBUG_PROXY */
|
|
|
|
/* create server-side socket and eventbuffer */
|
|
// Children rely on the findings of parent
|
|
if (!autossl_ctx->clienthello_found) {
|
|
prototcp_setup_dst_child(ctx);
|
|
} else {
|
|
protossl_setup_dst_child(ctx);
|
|
}
|
|
}
|
|
|
|
static void NONNULL(1)
|
|
protoautossl_bev_readcb_src(struct bufferevent *bev, pxy_conn_ctx_t *ctx)
|
|
{
|
|
#ifdef DEBUG_PROXY
|
|
log_dbg_level_printf(LOG_DBG_MODE_FINEST, "protoautossl_bev_readcb_src: ENTER, size=%zu, fd=%d\n",
|
|
evbuffer_get_length(bufferevent_get_input(bev)), ctx->fd);
|
|
#endif /* DEBUG_PROXY */
|
|
|
|
protoautossl_ctx_t *autossl_ctx = ctx->protoctx->arg;
|
|
|
|
if (autossl_ctx->clienthello_search) {
|
|
if (protoautossl_peek_and_upgrade(ctx)) {
|
|
return;
|
|
}
|
|
}
|
|
|
|
if (ctx->dst.closed) {
|
|
pxy_discard_inbuf(bev);
|
|
return;
|
|
}
|
|
|
|
struct evbuffer *inbuf = bufferevent_get_input(bev);
|
|
struct evbuffer *outbuf = bufferevent_get_output(ctx->dst.bev);
|
|
|
|
size_t packet_size = evbuffer_get_length(inbuf);
|
|
// +2 is for \r\n
|
|
unsigned char *packet = pxy_malloc_packet(packet_size + ctx->sslproxy_header_len + 2, ctx);
|
|
if (!packet) {
|
|
return;
|
|
}
|
|
|
|
evbuffer_remove(inbuf, packet, packet_size);
|
|
|
|
#ifdef DEBUG_PROXY
|
|
log_dbg_level_printf(LOG_DBG_MODE_FINEST, "protoautossl_bev_readcb_src: ORIG packet, size=%zu, fd=%d:\n%.*s\n",
|
|
packet_size, ctx->fd, (int)packet_size, packet);
|
|
#endif /* DEBUG_PROXY */
|
|
|
|
if (autossl_ctx->clienthello_search) {
|
|
#ifdef DEBUG_PROXY
|
|
log_dbg_level_printf(LOG_DBG_MODE_FINER, "protoautossl_bev_readcb_src: clienthello_search Duping packet to srvdst, size=%zu, fd=%d:\n%.*s\n",
|
|
packet_size, ctx->fd, (int)packet_size, packet);
|
|
#endif /* DEBUG_PROXY */
|
|
|
|
// Dup packet to server while searching for clienthello in autossl mode, without adding SSLproxy specific header
|
|
evbuffer_add(bufferevent_get_output(ctx->srvdst.bev), packet, packet_size);
|
|
pxy_try_set_watermark(bev, ctx, ctx->srvdst.bev);
|
|
}
|
|
|
|
if (!ctx->sent_sslproxy_header) {
|
|
pxy_insert_sslproxy_header(ctx, packet, &packet_size);
|
|
}
|
|
evbuffer_add(outbuf, packet, packet_size);
|
|
|
|
#ifdef DEBUG_PROXY
|
|
log_dbg_level_printf(LOG_DBG_MODE_FINEST, "protoautossl_bev_readcb_src: NEW packet, size=%zu, fd=%d:\n%.*s\n",
|
|
packet_size, ctx->fd, (int)packet_size, packet);
|
|
#endif /* DEBUG_PROXY */
|
|
|
|
free(packet);
|
|
pxy_try_set_watermark(bev, ctx, ctx->dst.bev);
|
|
}
|
|
|
|
static void NONNULL(1)
|
|
protoautossl_bev_readcb_dst(struct bufferevent *bev, pxy_conn_ctx_t *ctx)
|
|
{
|
|
#ifdef DEBUG_PROXY
|
|
log_dbg_level_printf(LOG_DBG_MODE_FINEST, "protoautossl_bev_readcb_dst: ENTER, size=%zu, fd=%d\n",
|
|
evbuffer_get_length(bufferevent_get_input(bev)), ctx->fd);
|
|
#endif /* DEBUG_PROXY */
|
|
|
|
protoautossl_ctx_t *autossl_ctx = ctx->protoctx->arg;
|
|
|
|
if (autossl_ctx->clienthello_search) {
|
|
if (protoautossl_peek_and_upgrade(ctx)) {
|
|
return;
|
|
}
|
|
}
|
|
|
|
if (ctx->src.closed) {
|
|
pxy_discard_inbuf(bev);
|
|
return;
|
|
}
|
|
|
|
struct evbuffer *inbuf = bufferevent_get_input(bev);
|
|
struct evbuffer *outbuf = bufferevent_get_output(ctx->src.bev);
|
|
evbuffer_add_buffer(outbuf, inbuf);
|
|
pxy_try_set_watermark(bev, ctx, ctx->src.bev);
|
|
}
|
|
|
|
static void NONNULL(1)
|
|
protoautossl_bev_readcb_srvdst(struct bufferevent *bev, pxy_conn_ctx_t *ctx)
|
|
{
|
|
#ifdef DEBUG_PROXY
|
|
log_dbg_level_printf(LOG_DBG_MODE_FINEST, "protoautossl_bev_readcb_srvdst: ENTER, size=%zu, fd=%d\n",
|
|
evbuffer_get_length(bufferevent_get_input(bev)), ctx->fd);
|
|
#endif /* DEBUG_PROXY */
|
|
|
|
protoautossl_ctx_t *autossl_ctx = ctx->protoctx->arg;
|
|
|
|
if (autossl_ctx->clienthello_search) {
|
|
if (protoautossl_peek_and_upgrade(ctx)) {
|
|
return;
|
|
}
|
|
}
|
|
|
|
struct evbuffer *inbuf = bufferevent_get_input(bev);
|
|
size_t inbuf_size = evbuffer_get_length(inbuf);
|
|
|
|
#ifdef DEBUG_PROXY
|
|
log_dbg_level_printf(LOG_DBG_MODE_FINER, "protoautossl_bev_readcb_srvdst: clienthello_search Discarding packet, size=%zu, fd=%d\n",
|
|
inbuf_size, ctx->fd);
|
|
#endif /* DEBUG_PROXY */
|
|
|
|
// Discard packets to client while searching for clienthello in autossl mode, because child conn passes them along already
|
|
// Otherwise client would receive the same packet twice
|
|
evbuffer_drain(inbuf, inbuf_size);
|
|
}
|
|
|
|
static void NONNULL(1,2)
|
|
protoautossl_bev_eventcb_connected_src(UNUSED struct bufferevent *bev, UNUSED pxy_conn_ctx_t *ctx)
|
|
{
|
|
#ifdef DEBUG_PROXY
|
|
log_dbg_level_printf(LOG_DBG_MODE_FINEST, "protoautossl_bev_eventcb_connected_src: ENTER, fd=%d\n", ctx->fd);
|
|
#endif /* DEBUG_PROXY */
|
|
}
|
|
|
|
static void NONNULL(1)
|
|
protoautossl_close_srvdst(pxy_conn_ctx_t *ctx)
|
|
{
|
|
#ifdef DEBUG_PROXY
|
|
log_dbg_level_printf(LOG_DBG_MODE_FINER, "protoautossl_close_srvdst: Closing srvdst, srvdst fd=%d, fd=%d\n", bufferevent_getfd(ctx->srvdst.bev), ctx->fd);
|
|
#endif /* DEBUG_PROXY */
|
|
|
|
// @attention Free the srvdst of the conn asap, we don't need it anymore, but we need its fd
|
|
// So save its ssl info for logging
|
|
// @todo Do we always have srvdst.ssl or not? Can we use ssl or tcp versions of this function?
|
|
if (ctx->srvdst.ssl) {
|
|
ctx->sslctx->srvdst_ssl_version = strdup(SSL_get_version(ctx->srvdst.ssl));
|
|
ctx->sslctx->srvdst_ssl_cipher = strdup(SSL_get_cipher(ctx->srvdst.ssl));
|
|
}
|
|
|
|
// @attention When both eventcb and writecb for srvdst are enabled, either eventcb or writecb may get a NULL srvdst bev, causing a crash with signal 10.
|
|
// So, from this point on, we should check if srvdst is NULL or not.
|
|
ctx->protoctx->bufferevent_free_and_close_fd(ctx->srvdst.bev, ctx);
|
|
ctx->srvdst.bev = NULL;
|
|
ctx->srvdst.closed = 1;
|
|
}
|
|
|
|
static int NONNULL(1)
|
|
protoautossl_enable_src(pxy_conn_ctx_t *ctx)
|
|
{
|
|
protoautossl_ctx_t *autossl_ctx = ctx->protoctx->arg;
|
|
|
|
#ifdef DEBUG_PROXY
|
|
log_dbg_level_printf(LOG_DBG_MODE_FINEST, "protoautossl_enable_src: ENTER, fd=%d\n", ctx->fd);
|
|
#endif /* DEBUG_PROXY */
|
|
|
|
// Create and set up src.bev
|
|
if (!autossl_ctx->clienthello_found) {
|
|
// Create tcp src.bev first
|
|
if (prototcp_setup_src(ctx) == -1) {
|
|
return -1;
|
|
}
|
|
} else {
|
|
if (OPTS_DEBUG(ctx->opts)) {
|
|
log_dbg_printf("Completing autossl upgrade\n");
|
|
}
|
|
|
|
// tcp src.bev is already created above
|
|
int rv;
|
|
if ((rv = protossl_setup_src_ssl(ctx)) != 0) {
|
|
return rv;
|
|
}
|
|
// Replace tcp src.bev with ssl version
|
|
if (protossl_setup_src_new_bev_ssl_accepting(ctx) == -1) {
|
|
return -1;
|
|
}
|
|
}
|
|
bufferevent_setcb(ctx->src.bev, pxy_bev_readcb, pxy_bev_writecb, pxy_bev_eventcb, ctx);
|
|
|
|
// srvdst is not needed after clienthello search is over
|
|
if (ctx->srvdst.bev && !autossl_ctx->clienthello_search) {
|
|
protoautossl_close_srvdst(ctx);
|
|
}
|
|
|
|
// Skip child listener setup if completing autossl upgrade, after finding clienthello
|
|
if (autossl_ctx->clienthello_search) {
|
|
if (pxy_setup_child_listener(ctx) == -1) {
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
#ifdef DEBUG_PROXY
|
|
log_dbg_level_printf(LOG_DBG_MODE_FINER, "pxy_autossl_enable_src: Enabling src, %s, child_fd=%d, fd=%d\n", ctx->sslproxy_header, ctx->child_fd, ctx->fd);
|
|
#endif /* DEBUG_PROXY */
|
|
|
|
// Now open the gates, perhaps for a second time in autossl mode
|
|
bufferevent_enable(ctx->src.bev, EV_READ|EV_WRITE);
|
|
return 0;
|
|
}
|
|
|
|
static void NONNULL(1,2)
|
|
protoautossl_bev_eventcb_connected_dst(UNUSED struct bufferevent *bev, pxy_conn_ctx_t *ctx)
|
|
{
|
|
protoautossl_ctx_t *autossl_ctx = ctx->protoctx->arg;
|
|
|
|
#ifdef DEBUG_PROXY
|
|
log_dbg_level_printf(LOG_DBG_MODE_FINEST, "protoautossl_bev_eventcb_connected_dst: ENTER, fd=%d\n", ctx->fd);
|
|
#endif /* DEBUG_PROXY */
|
|
|
|
ctx->dst_connected = 1;
|
|
|
|
// @todo Reduce this if condition
|
|
if (ctx->srvdst_connected && ctx->dst_connected && (!ctx->connected || (autossl_ctx->clienthello_found && ctx->srvdst.bev))) {
|
|
ctx->connected = 1;
|
|
|
|
if (protoautossl_enable_src(ctx) == -1) {
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void NONNULL(1,2)
|
|
protoautossl_bev_eventcb_connected_srvdst(UNUSED struct bufferevent *bev, pxy_conn_ctx_t *ctx)
|
|
{
|
|
protoautossl_ctx_t *autossl_ctx = ctx->protoctx->arg;
|
|
|
|
#ifdef DEBUG_PROXY
|
|
log_dbg_level_printf(LOG_DBG_MODE_FINEST, "protoautossl_bev_eventcb_connected_srvdst: ENTER, fd=%d\n", ctx->fd);
|
|
#endif /* DEBUG_PROXY */
|
|
|
|
// srvdst may be already connected while upgrading to ssl
|
|
if (!ctx->srvdst_connected) {
|
|
ctx->srvdst_connected = 1;
|
|
|
|
// @attention Create and enable dst.bev before, but connect here, because we check if dst.bev is NULL elsewhere
|
|
if (bufferevent_socket_connect(ctx->dst.bev, (struct sockaddr *)&ctx->spec->conn_dst_addr,
|
|
ctx->spec->conn_dst_addrlen) == -1) {
|
|
#ifdef DEBUG_PROXY
|
|
log_dbg_level_printf(LOG_DBG_MODE_FINE, "protoautossl_bev_eventcb_connected_srvdst: FAILED bufferevent_socket_connect for dst, fd=%d\n", ctx->fd);
|
|
#endif /* DEBUG_PROXY */
|
|
|
|
pxy_conn_term(ctx, 1);
|
|
return;
|
|
}
|
|
}
|
|
|
|
if (ctx->srvdst_connected && ctx->dst_connected && (!ctx->connected || autossl_ctx->clienthello_found)) {
|
|
ctx->connected = 1;
|
|
|
|
if (protoautossl_enable_src(ctx) == -1) {
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void NONNULL(1)
|
|
protoautossl_bev_readcb_complete_upgrade_child(pxy_conn_child_ctx_t *ctx)
|
|
{
|
|
if (OPTS_DEBUG(ctx->conn->opts)) {
|
|
log_dbg_printf("Completing autossl upgrade on child conn\n");
|
|
}
|
|
|
|
if (protossl_setup_dst_ssl_child(ctx) == -1) {
|
|
return;
|
|
}
|
|
if (protossl_setup_dst_new_bev_ssl_connecting_child(ctx) == -1) {
|
|
return;
|
|
}
|
|
bufferevent_setcb(ctx->dst.bev, pxy_bev_readcb_child, pxy_bev_writecb_child, pxy_bev_eventcb_child, ctx);
|
|
|
|
#ifdef DEBUG_PROXY
|
|
log_dbg_level_printf(LOG_DBG_MODE_FINER, "protoautossl_bev_readcb_complete_upgrade_child: Enabling dst, child fd=%d, fd=%d\n", ctx->fd, ctx->conn->fd);
|
|
#endif /* DEBUG_PROXY */
|
|
|
|
bufferevent_enable(ctx->dst.bev, EV_READ|EV_WRITE);
|
|
}
|
|
|
|
static void NONNULL(1)
|
|
protoautossl_bev_readcb_src_child(struct bufferevent *bev, pxy_conn_child_ctx_t *ctx)
|
|
{
|
|
#ifdef DEBUG_PROXY
|
|
log_dbg_level_printf(LOG_DBG_MODE_FINEST, "protoautossl_bev_readcb_src_child: ENTER, size=%zu, child fd=%d, fd=%d\n",
|
|
evbuffer_get_length(bufferevent_get_input(bev)), ctx->fd, ctx->conn->fd);
|
|
#endif /* DEBUG_PROXY */
|
|
|
|
protoautossl_ctx_t *autossl_ctx = ctx->conn->protoctx->arg;
|
|
|
|
// Autossl upgrade on child connections follows the findings of parent
|
|
if (autossl_ctx->clienthello_found && !ctx->dst.ssl) {
|
|
protoautossl_bev_readcb_complete_upgrade_child(ctx);
|
|
return;
|
|
}
|
|
|
|
if (ctx->dst.closed) {
|
|
pxy_discard_inbuf(bev);
|
|
return;
|
|
}
|
|
|
|
struct evbuffer *inbuf = bufferevent_get_input(bev);
|
|
struct evbuffer *outbuf = bufferevent_get_output(ctx->dst.bev);
|
|
|
|
if (!ctx->removed_sslproxy_header) {
|
|
size_t packet_size = evbuffer_get_length(inbuf);
|
|
unsigned char *packet = pxy_malloc_packet(packet_size, ctx->conn);
|
|
if (!packet) {
|
|
return;
|
|
}
|
|
|
|
evbuffer_remove(inbuf, packet, packet_size);
|
|
pxy_try_remove_sslproxy_header(ctx, packet, &packet_size);
|
|
evbuffer_add(outbuf, packet, packet_size);
|
|
|
|
#ifdef DEBUG_PROXY
|
|
log_dbg_level_printf(LOG_DBG_MODE_FINEST, "protoautossl_bev_readcb_src_child: NEW packet, size=%zu, child fd=%d, fd=%d:\n%.*s\n",
|
|
packet_size, ctx->fd, ctx->conn->fd, (int)packet_size, packet);
|
|
#endif /* DEBUG_PROXY */
|
|
|
|
free(packet);
|
|
} else {
|
|
evbuffer_add_buffer(outbuf, inbuf);
|
|
}
|
|
pxy_try_set_watermark(bev, ctx->conn, ctx->dst.bev);
|
|
}
|
|
|
|
static void NONNULL(1)
|
|
protoautossl_bev_readcb_dst_child(struct bufferevent *bev, pxy_conn_child_ctx_t *ctx)
|
|
{
|
|
#ifdef DEBUG_PROXY
|
|
log_dbg_level_printf(LOG_DBG_MODE_FINEST, "protoautossl_bev_readcb_dst_child: ENTER, size=%zu, child fd=%d, fd=%d\n",
|
|
evbuffer_get_length(bufferevent_get_input(bev)), ctx->fd, ctx->conn->fd);
|
|
#endif /* DEBUG_PROXY */
|
|
|
|
protoautossl_ctx_t *autossl_ctx = ctx->conn->protoctx->arg;
|
|
|
|
// Autossl upgrade on child connections follows the findings of parent
|
|
if (autossl_ctx->clienthello_found && !ctx->dst.ssl) {
|
|
protoautossl_bev_readcb_complete_upgrade_child(ctx);
|
|
return;
|
|
}
|
|
|
|
if (ctx->src.closed) {
|
|
pxy_discard_inbuf(bev);
|
|
return;
|
|
}
|
|
|
|
struct evbuffer *inbuf = bufferevent_get_input(bev);
|
|
struct evbuffer *outbuf = bufferevent_get_output(ctx->src.bev);
|
|
evbuffer_add_buffer(outbuf, inbuf);
|
|
pxy_try_set_watermark(bev, ctx->conn, ctx->src.bev);
|
|
}
|
|
|
|
static void NONNULL(1,2)
|
|
protoautossl_bev_eventcb_connected_dst_child(UNUSED struct bufferevent *bev, pxy_conn_child_ctx_t *ctx)
|
|
{
|
|
protoautossl_ctx_t *autossl_ctx = ctx->conn->protoctx->arg;
|
|
|
|
#ifdef DEBUG_PROXY
|
|
log_dbg_level_printf(LOG_DBG_MODE_FINEST, "protoautossl_bev_eventcb_connected_dst_child: ENTER, child fd=%d, fd=%d\n", ctx->fd, ctx->conn->fd);
|
|
#endif /* DEBUG_PROXY */
|
|
|
|
ctx->connected = 1;
|
|
|
|
// @attention Create and enable src.bev before, but connect here, because we check if dst.bev is NULL elsewhere
|
|
bufferevent_enable(ctx->src.bev, EV_READ|EV_WRITE);
|
|
|
|
// Check if we have arrived here right after autossl upgrade, which may be triggered by readcb on src
|
|
// Autossl upgrade code leaves readcb without processing any data in input buffer of src
|
|
// So, if we don't call readcb here, the connection would stall
|
|
if (autossl_ctx->clienthello_found && evbuffer_get_length(bufferevent_get_input(ctx->src.bev))) {
|
|
#ifdef DEBUG_PROXY
|
|
log_dbg_level_printf(LOG_DBG_MODE_FINER, "protoautossl_bev_eventcb_connected_dst_child: clienthello_found src inbuf len > 0, calling pxy_bev_readcb_child for src, child fd=%d, fd=%d\n", ctx->fd, ctx->conn->fd);
|
|
#endif /* DEBUG_PROXY */
|
|
|
|
if (pxy_bev_readcb_preexec_logging_and_stats_child(bev, ctx) == -1) {
|
|
return;
|
|
}
|
|
ctx->protoctx->bev_readcb(ctx->src.bev, ctx);
|
|
}
|
|
}
|
|
|
|
static void NONNULL(1)
|
|
protoautossl_bev_eventcb_src(struct bufferevent *bev, short events, pxy_conn_ctx_t *ctx)
|
|
{
|
|
if (events & BEV_EVENT_CONNECTED) {
|
|
protoautossl_bev_eventcb_connected_src(bev, ctx);
|
|
} else if (events & BEV_EVENT_EOF) {
|
|
prototcp_bev_eventcb_eof_src(bev, ctx);
|
|
} else if (events & BEV_EVENT_ERROR) {
|
|
prototcp_bev_eventcb_error_src(bev, ctx);
|
|
}
|
|
}
|
|
|
|
static void NONNULL(1)
|
|
protoautossl_bev_eventcb_dst(struct bufferevent *bev, short events, pxy_conn_ctx_t *ctx)
|
|
{
|
|
if (events & BEV_EVENT_CONNECTED) {
|
|
protoautossl_bev_eventcb_connected_dst(bev, ctx);
|
|
} else if (events & BEV_EVENT_EOF) {
|
|
prototcp_bev_eventcb_eof_dst(bev, ctx);
|
|
} else if (events & BEV_EVENT_ERROR) {
|
|
prototcp_bev_eventcb_error_dst(bev, ctx);
|
|
}
|
|
}
|
|
|
|
static void NONNULL(1)
|
|
protoautossl_bev_eventcb_srvdst(struct bufferevent *bev, short events, pxy_conn_ctx_t *ctx)
|
|
{
|
|
if (events & BEV_EVENT_CONNECTED) {
|
|
protoautossl_bev_eventcb_connected_srvdst(bev, ctx);
|
|
} else if (events & BEV_EVENT_EOF) {
|
|
prototcp_bev_eventcb_eof_srvdst(bev, ctx);
|
|
} else if (events & BEV_EVENT_ERROR) {
|
|
prototcp_bev_eventcb_error_srvdst(bev, ctx);
|
|
}
|
|
}
|
|
|
|
static void NONNULL(1)
|
|
protoautossl_bev_eventcb_dst_child(struct bufferevent *bev, short events, pxy_conn_child_ctx_t *ctx)
|
|
{
|
|
if (events & BEV_EVENT_CONNECTED) {
|
|
protoautossl_bev_eventcb_connected_dst_child(bev, ctx);
|
|
} else if (events & BEV_EVENT_EOF) {
|
|
prototcp_bev_eventcb_eof_dst_child(bev, ctx);
|
|
} else if (events & BEV_EVENT_ERROR) {
|
|
prototcp_bev_eventcb_error_dst_child(bev, ctx);
|
|
}
|
|
}
|
|
|
|
static void NONNULL(1)
|
|
protoautossl_bev_readcb(struct bufferevent *bev, void *arg)
|
|
{
|
|
pxy_conn_ctx_t *ctx = arg;
|
|
|
|
if (bev == ctx->src.bev) {
|
|
protoautossl_bev_readcb_src(bev, ctx);
|
|
} else if (bev == ctx->dst.bev) {
|
|
protoautossl_bev_readcb_dst(bev, ctx);
|
|
} else if (bev == ctx->srvdst.bev) {
|
|
protoautossl_bev_readcb_srvdst(bev, ctx);
|
|
} else {
|
|
log_err_printf("protoautossl_bev_readcb: UNKWN conn end\n");
|
|
}
|
|
}
|
|
|
|
static void NONNULL(1)
|
|
protoautossl_bev_readcb_child(struct bufferevent *bev, void *arg)
|
|
{
|
|
pxy_conn_child_ctx_t *ctx = arg;
|
|
|
|
if (bev == ctx->src.bev) {
|
|
protoautossl_bev_readcb_src_child(bev, ctx);
|
|
} else if (bev == ctx->dst.bev) {
|
|
protoautossl_bev_readcb_dst_child(bev, ctx);
|
|
} else {
|
|
log_err_printf("protoautossl_bev_readcb_child: UNKWN conn end\n");
|
|
}
|
|
}
|
|
|
|
static void NONNULL(1)
|
|
protoautossl_bev_eventcb(struct bufferevent *bev, short events, void *arg)
|
|
{
|
|
pxy_conn_ctx_t *ctx = arg;
|
|
protoautossl_ctx_t *autossl_ctx = ctx->protoctx->arg;
|
|
|
|
if ((events & BEV_EVENT_ERROR) && autossl_ctx->clienthello_found) {
|
|
protossl_log_ssl_error(bev, ctx);
|
|
}
|
|
|
|
if (bev == ctx->src.bev) {
|
|
protoautossl_bev_eventcb_src(bev, events, ctx);
|
|
} else if (bev == ctx->dst.bev) {
|
|
protoautossl_bev_eventcb_dst(bev, events, ctx);
|
|
} else if (bev == ctx->srvdst.bev) {
|
|
protoautossl_bev_eventcb_srvdst(bev, events, ctx);
|
|
} else {
|
|
log_err_printf("protoautossl_bev_eventcb: UNKWN conn end\n");
|
|
}
|
|
}
|
|
|
|
static void NONNULL(1)
|
|
protoautossl_bev_eventcb_child(struct bufferevent *bev, short events, void *arg)
|
|
{
|
|
pxy_conn_child_ctx_t *ctx = arg;
|
|
|
|
if (bev == ctx->src.bev) {
|
|
prototcp_bev_eventcb_src_child(bev, events, ctx);
|
|
} else if (bev == ctx->dst.bev) {
|
|
protoautossl_bev_eventcb_dst_child(bev, events, ctx);
|
|
} else {
|
|
log_err_printf("protoautossl_bev_eventcb_child: UNKWN conn end\n");
|
|
}
|
|
}
|
|
|
|
static void NONNULL(1)
|
|
protoautossl_free(pxy_conn_ctx_t *ctx)
|
|
{
|
|
protoautossl_ctx_t *autossl_ctx = ctx->protoctx->arg;
|
|
free(autossl_ctx);
|
|
protossl_free(ctx);
|
|
}
|
|
|
|
protocol_t
|
|
protoautossl_setup(pxy_conn_ctx_t *ctx)
|
|
{
|
|
ctx->protoctx->proto = PROTO_AUTOSSL;
|
|
ctx->protoctx->connectcb = protoautossl_conn_connect;
|
|
ctx->protoctx->fd_readcb = prototcp_fd_readcb;
|
|
|
|
ctx->protoctx->bev_readcb = protoautossl_bev_readcb;
|
|
ctx->protoctx->bev_writecb = prototcp_bev_writecb;
|
|
ctx->protoctx->bev_eventcb = protoautossl_bev_eventcb;
|
|
|
|
ctx->protoctx->bufferevent_free_and_close_fd = protoautossl_bufferevent_free_and_close_fd;
|
|
ctx->protoctx->proto_free = protoautossl_free;
|
|
|
|
ctx->protoctx->arg = malloc(sizeof(protoautossl_ctx_t));
|
|
if (!ctx->protoctx->arg) {
|
|
free(ctx->protoctx);
|
|
return PROTO_ERROR;
|
|
}
|
|
memset(ctx->protoctx->arg, 0, sizeof(protoautossl_ctx_t));
|
|
protoautossl_ctx_t *autossl_ctx = ctx->protoctx->arg;
|
|
autossl_ctx->clienthello_search = 1;
|
|
|
|
ctx->sslctx = malloc(sizeof(ssl_ctx_t));
|
|
if (!ctx->sslctx) {
|
|
free(ctx->protoctx->arg);
|
|
free(ctx->protoctx);
|
|
return PROTO_ERROR;
|
|
}
|
|
memset(ctx->sslctx, 0, sizeof(ssl_ctx_t));
|
|
|
|
return PROTO_AUTOSSL;
|
|
}
|
|
|
|
protocol_t
|
|
protoautossl_setup_child(pxy_conn_child_ctx_t *ctx)
|
|
{
|
|
ctx->protoctx->proto = PROTO_AUTOSSL;
|
|
ctx->protoctx->connectcb = protoautossl_connect_child;
|
|
|
|
ctx->protoctx->bev_readcb = protoautossl_bev_readcb_child;
|
|
ctx->protoctx->bev_writecb = prototcp_bev_writecb_child;
|
|
ctx->protoctx->bev_eventcb = protoautossl_bev_eventcb_child;
|
|
|
|
ctx->protoctx->bufferevent_free_and_close_fd = protoautossl_bufferevent_free_and_close_fd;
|
|
return PROTO_AUTOSSL;
|
|
}
|
|
|
|
/* vim: set noet ft=c: */
|