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First working SSL version, surprisingly running so fine and stable for a first prototype that I think there is something wrong and it is just running in passthrough mode :), seriously this is just the beginning.

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This commit is contained in:
Soner Tari 2017-06-10 21:50:03 +03:00
parent d033ea68dd
commit 85a96ec844
2 changed files with 327 additions and 19 deletions
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4
proxy.c
View File

@ -283,8 +283,8 @@ proxy_listener_acceptcb(UNUSED struct evconnlistener *listener,
mctx->evcl2 = evcl2;
evconnlistener_set_error_cb(evcl2, proxy_listener_errorcb);
log_dbg_printf(">>>>> proxy_listener_acceptcb: <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< bufferevent_enable(parent_ctx->dst.bev)\n");
bufferevent_enable(parent_ctx->dst.bev, EV_READ|EV_WRITE);
// log_dbg_printf(">>>>> proxy_listener_acceptcb: <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< bufferevent_enable(parent_ctx->dst.bev)\n");
// bufferevent_enable(parent_ctx->dst.bev, EV_READ|EV_WRITE);
log_dbg_printf(">>>>> proxy_listener_acceptcb: FINISHED SETTING UP E2 SUCCESS, parent fd=%d, NEW fd2=%d\n", fd, fd2);
// pthread_mutex_unlock(lmutex);

316
pxyconn.c
View File

@ -1113,9 +1113,9 @@ pxy_bufferevent_setup(pxy_conn_ctx_t *ctx, evutil_socket_t fd, SSL *ssl)
log_dbg_printf(">>>>> pxy_bufferevent_setup(): ENTER fd=%d\n", (int)fd);
if (ssl) {
log_dbg_printf(">>>>> pxy_bufferevent_setup(): bufferevent_openssl_socket_new <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< SSL\n");
bev = bufferevent_openssl_socket_new(ctx->evbase, fd, ssl,
((fd == -1) ? BUFFEREVENT_SSL_CONNECTING
: BUFFEREVENT_SSL_ACCEPTING),
((fd == -1) ? BUFFEREVENT_SSL_CONNECTING : BUFFEREVENT_SSL_ACCEPTING),
BEV_OPT_DEFER_CALLBACKS);
} else {
bev = bufferevent_socket_new(ctx->evbase, fd, BEV_OPT_DEFER_CALLBACKS);
@ -1127,6 +1127,7 @@ pxy_bufferevent_setup(pxy_conn_ctx_t *ctx, evutil_socket_t fd, SSL *ssl)
}
#if LIBEVENT_VERSION_NUMBER >= 0x02010000
if (ssl) {
log_dbg_printf(">>>>> pxy_bufferevent_setup(): bufferevent_openssl_set_allow_dirty_shutdown <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< SSL\n");
/* Prevent unclean (dirty) shutdowns to cause error
* events on the SSL socket bufferevent. */
bufferevent_openssl_set_allow_dirty_shutdown(bev, 1);
@ -1152,9 +1153,16 @@ pxy_bufferevent_setup_e2(pxy_conn_ctx_t *ctx, evutil_socket_t fd, SSL *ssl)
log_dbg_printf(">>>>> pxy_bufferevent_setup_e2(): ENTER %d\n", (int)fd);
// bev = bufferevent_socket_new(ctx->evbase, fd, BEV_OPT_DEFER_CALLBACKS);
//// bev = bufferevent_socket_new(ctx->evbase, fd, BEV_OPT_DEFER_CALLBACKS|BEV_OPT_THREADSAFE);
if (ssl) {
bev = bufferevent_openssl_socket_new(ctx->evbase, fd, ssl,
((fd == -1) ? BUFFEREVENT_SSL_CONNECTING : BUFFEREVENT_SSL_ACCEPTING), BEV_OPT_DEFER_CALLBACKS);
} else {
bev = bufferevent_socket_new(ctx->evbase, fd, BEV_OPT_DEFER_CALLBACKS);
// bev = bufferevent_socket_new(ctx->evbase, fd, BEV_OPT_DEFER_CALLBACKS|BEV_OPT_THREADSAFE);
}
if (!bev) {
log_err_printf("Error creating bufferevent socket\n");
return NULL;
@ -1502,6 +1510,7 @@ pxy_conn_autossl_peek_and_upgrade(pxy_conn_ctx_t *ctx)
bufferevent_setcb(ctx->dst.bev, pxy_bev_readcb,
pxy_bev_writecb, pxy_bev_eventcb,
ctx);
log_dbg_printf(">>>>>----------------------- pxy_conn_autossl_peek_and_upgrade(): bufferevent_enable\n");
bufferevent_enable(ctx->dst.bev, EV_READ|EV_WRITE);
if(!ctx->dst.bev) {
return 0;
@ -2015,6 +2024,13 @@ pxy_bev_readcb(struct bufferevent *bev, void *arg)
log_dbg_printf(">>>>>,,,,,,,,,,,,,,,,,,,,,,, pxy_bev_readcb: %s, fd=%d\n", event_name, ctx->fd);
if (bev == ctx->src.bev) {
if (ctx->clienthello_search) {
if (pxy_conn_autossl_peek_and_upgrade(ctx)) {
log_dbg_printf(">>>>>,,,,,,,,,,,,,,,,,,,,,,, pxy_bev_readcb: pxy_conn_autossl_peek_and_upgrade RETURNS\n");
return;
}
}
if (ctx->e2src.bev) {
struct evbuffer *inbuf = bufferevent_get_input(bev);
@ -2310,6 +2326,43 @@ pxy_connected_enable(struct bufferevent *bev, pxy_conn_ctx_t *ctx, char *event_n
if (ctx->dst_connected && ctx->e2src_connected && !ctx->connected) {
ctx->connected = 1;
pxy_conn_desc_t *dst_ctx = &ctx->dst;
if ((ctx->spec->ssl || ctx->clienthello_found) && !ctx->passthrough) {
log_dbg_printf(">>>>>=================================== pxy_srcssl_create <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< SSL\n");
ctx->src.ssl = pxy_srcssl_create(ctx, dst_ctx->ssl);
// if (!ctx->src.ssl) {
// bufferevent_free_and_close_fd(bev, ctx);
// ctx->dst.bev = NULL;
// ctx->dst.ssl = NULL;
//// if (ctx->opts->passthrough && !ctx->enomem) {
//// ctx->passthrough = 1;
//// ctx->connected = 0;
//// log_dbg_printf("No cert found; "
//// "falling back "
//// "to passthrough\n");
//// pxy_fd_readcb(ctx->fd, 0, ctx);
//// return;
//// }
// evutil_closesocket(ctx->fd);
// pxy_conn_ctx_free(ctx);
// return;
// }
}
if (ctx->clienthello_found) {
if (OPTS_DEBUG(ctx->opts)) {
log_dbg_printf(">>>>>=================================== pxy_connected_enable: Completing autossl upgrade\n");
}
ctx->src.bev = bufferevent_openssl_filter_new(
ctx->evbase, ctx->src.bev, ctx->src.ssl,
BUFFEREVENT_SSL_ACCEPTING,
BEV_OPT_DEFER_CALLBACKS);
bufferevent_setcb(ctx->src.bev, pxy_bev_readcb,
pxy_bev_writecb, pxy_bev_eventcb,
ctx);
// bufferevent_enable(ctx->src.bev, EV_READ|EV_WRITE);
} else {
// ctx->src.bev = pxy_bufferevent_setup(ctx, ctx->fd,
// ctx->src.ssl);
log_dbg_printf(">>>>>=================================== pxy_connected_enable: SETUP src.bev fd=%d\n", ctx->fd);
ctx->src.bev = pxy_bufferevent_setup(ctx, ctx->fd, ctx->src.ssl);
if (!ctx->src.bev) {
@ -2320,6 +2373,8 @@ pxy_connected_enable(struct bufferevent *bev, pxy_conn_ctx_t *ctx, char *event_n
pxy_conn_ctx_free(ctx);
return 0;
}
}
bufferevent_enable(ctx->src.bev, EV_READ|EV_WRITE);
}
@ -2528,10 +2583,146 @@ pxy_bev_eventcb(struct bufferevent *bev, short events, void *arg)
if (!pxy_connected_enable(bev, ctx, event_name)) {
goto leave;
}
// log_dbg_printf(">>>>>=================================== pxy_bev_eventcb: WILL call pxy_srccert_write <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< SSL\n");
pxy_conn_desc_t *src_ctx = &ctx->src;
/* write SSL certificates to gendir */
if (src_ctx->ssl && (bev == ctx->src.bev) && ctx->opts->certgendir) {
log_dbg_printf(">>>>>=================================== pxy_bev_eventcb: pxy_srccert_write <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< SSL\n");
pxy_srccert_write(ctx);
}
if (OPTS_DEBUG(ctx->opts)) {
if (src_ctx->ssl) {
/* for SSL, we get two connect events */
log_dbg_printf("SSL connected %s [%s]:%s"
" %s %s\n",
bev == ctx->dst.bev ?
"to" : "from",
bev == ctx->dst.bev ?
ctx->dsthost_str :
ctx->srchost_str,
bev == ctx->dst.bev ?
ctx->dstport_str :
ctx->srcport_str,
SSL_get_version(src_ctx->ssl),
SSL_get_cipher(src_ctx->ssl));
} else {
/* for TCP, we get only a dst connect event,
* since src was already connected from the
* beginning; mirror SSL debug output anyway
* in order not to confuse anyone who might be
* looking closely at the output */
log_dbg_printf("TCP connected to [%s]:%s\n",
ctx->dsthost_str,
ctx->dstport_str);
log_dbg_printf("TCP connected from [%s]:%s\n",
ctx->srchost_str,
ctx->srcport_str);
}
}
}
if (events & BEV_EVENT_ERROR) {
log_dbg_printf(">>>>>=================================== pxy_bev_eventcb: ERROR %s fd=%d\n", event_name, ctx->fd);
unsigned long sslerr;
int have_sslerr = 0;
/* Can happen for socket errs, ssl errs;
* may happen for unclean ssl socket shutdowns. */
sslerr = bufferevent_get_openssl_error(bev);
if (sslerr)
have_sslerr = 1;
if (!errno && !sslerr) {
#if LIBEVENT_VERSION_NUMBER >= 0x02010000
/* We have disabled notification for unclean shutdowns
* so this should not happen; log a warning. */
log_err_printf("Warning: Spurious error from "
"bufferevent (errno=0,sslerr=0)\n");
#else /* LIBEVENT_VERSION_NUMBER < 0x02010000 */
/* Older versions of libevent will report these. */
if (OPTS_DEBUG(ctx->opts)) {
log_dbg_printf("Unclean SSL shutdown.\n");
}
#endif /* LIBEVENT_VERSION_NUMBER < 0x02010000 */
} else if (ERR_GET_REASON(sslerr) ==
SSL_R_SSLV3_ALERT_HANDSHAKE_FAILURE) {
/* these can happen due to client cert auth,
* only log error if debugging is activated */
log_dbg_printf("Error from bufferevent: "
"%i:%s %lu:%i:%s:%i:%s:%i:%s\n",
errno,
errno ? strerror(errno) : "-",
sslerr,
ERR_GET_REASON(sslerr),
sslerr ?
ERR_reason_error_string(sslerr) : "-",
ERR_GET_LIB(sslerr),
sslerr ?
ERR_lib_error_string(sslerr) : "-",
ERR_GET_FUNC(sslerr),
sslerr ?
ERR_func_error_string(sslerr) : "-");
while ((sslerr = bufferevent_get_openssl_error(bev))) {
log_dbg_printf("Additional SSL error: "
"%lu:%i:%s:%i:%s:%i:%s\n",
sslerr,
ERR_GET_REASON(sslerr),
ERR_reason_error_string(sslerr),
ERR_GET_LIB(sslerr),
ERR_lib_error_string(sslerr),
ERR_GET_FUNC(sslerr),
ERR_func_error_string(sslerr));
}
} else {
/* real errors */
log_err_printf("Error from bufferevent: "
"%i:%s %lu:%i:%s:%i:%s:%i:%s\n",
errno,
errno ? strerror(errno) : "-",
sslerr,
ERR_GET_REASON(sslerr),
sslerr ?
ERR_reason_error_string(sslerr) : "-",
ERR_GET_LIB(sslerr),
sslerr ?
ERR_lib_error_string(sslerr) : "-",
ERR_GET_FUNC(sslerr),
sslerr ?
ERR_func_error_string(sslerr) : "-");
while ((sslerr = bufferevent_get_openssl_error(bev))) {
log_err_printf("Additional SSL error: "
"%lu:%i:%s:%i:%s:%i:%s\n",
sslerr,
ERR_GET_REASON(sslerr),
ERR_reason_error_string(sslerr),
ERR_GET_LIB(sslerr),
ERR_lib_error_string(sslerr),
ERR_GET_FUNC(sslerr),
ERR_func_error_string(sslerr));
}
}
pxy_conn_desc_t *src_ctx = &ctx->src;
/* we only get a single disconnect event here for both connections */
if (OPTS_DEBUG(ctx->opts)) {
log_dbg_printf("%s disconnected to [%s]:%s\n",
src_ctx->ssl ? "SSL" : "TCP",
ctx->dsthost_str, ctx->dstport_str);
log_dbg_printf("%s disconnected from [%s]:%s\n",
src_ctx->ssl ? "SSL" : "TCP",
ctx->srchost_str, ctx->srcport_str);
}
// this->closed = 1;
// bufferevent_free_and_close_fd(bev, ctx);
// this->bev = NULL;
// if (other->closed) {
// pxy_conn_ctx_free(ctx);
// }
}
if (events & BEV_EVENT_EOF) {
@ -2649,6 +2840,84 @@ pxy_bev_eventcb_e2(struct bufferevent *bev, short events, void *arg)
if (events & BEV_EVENT_ERROR) {
log_dbg_printf(">>>>>--------------------- pxy_bev_eventcb_e2: ERROR\n");
unsigned long sslerr;
int have_sslerr = 0;
/* Can happen for socket errs, ssl errs;
* may happen for unclean ssl socket shutdowns. */
sslerr = bufferevent_get_openssl_error(bev);
if (sslerr)
have_sslerr = 1;
if (!errno && !sslerr) {
#if LIBEVENT_VERSION_NUMBER >= 0x02010000
/* We have disabled notification for unclean shutdowns
* so this should not happen; log a warning. */
log_err_printf("Warning: Spurious error from "
"bufferevent (errno=0,sslerr=0)\n");
#else /* LIBEVENT_VERSION_NUMBER < 0x02010000 */
/* Older versions of libevent will report these. */
if (OPTS_DEBUG(ctx->opts)) {
log_dbg_printf("Unclean SSL shutdown.\n");
}
#endif /* LIBEVENT_VERSION_NUMBER < 0x02010000 */
} else if (ERR_GET_REASON(sslerr) ==
SSL_R_SSLV3_ALERT_HANDSHAKE_FAILURE) {
/* these can happen due to client cert auth,
* only log error if debugging is activated */
log_dbg_printf("Error from bufferevent: "
"%i:%s %lu:%i:%s:%i:%s:%i:%s\n",
errno,
errno ? strerror(errno) : "-",
sslerr,
ERR_GET_REASON(sslerr),
sslerr ?
ERR_reason_error_string(sslerr) : "-",
ERR_GET_LIB(sslerr),
sslerr ?
ERR_lib_error_string(sslerr) : "-",
ERR_GET_FUNC(sslerr),
sslerr ?
ERR_func_error_string(sslerr) : "-");
while ((sslerr = bufferevent_get_openssl_error(bev))) {
log_dbg_printf("Additional SSL error: "
"%lu:%i:%s:%i:%s:%i:%s\n",
sslerr,
ERR_GET_REASON(sslerr),
ERR_reason_error_string(sslerr),
ERR_GET_LIB(sslerr),
ERR_lib_error_string(sslerr),
ERR_GET_FUNC(sslerr),
ERR_func_error_string(sslerr));
}
} else {
/* real errors */
log_err_printf("Error from bufferevent: "
"%i:%s %lu:%i:%s:%i:%s:%i:%s\n",
errno,
errno ? strerror(errno) : "-",
sslerr,
ERR_GET_REASON(sslerr),
sslerr ?
ERR_reason_error_string(sslerr) : "-",
ERR_GET_LIB(sslerr),
sslerr ?
ERR_lib_error_string(sslerr) : "-",
ERR_GET_FUNC(sslerr),
sslerr ?
ERR_func_error_string(sslerr) : "-");
while ((sslerr = bufferevent_get_openssl_error(bev))) {
log_err_printf("Additional SSL error: "
"%lu:%i:%s:%i:%s:%i:%s\n",
sslerr,
ERR_GET_REASON(sslerr),
ERR_reason_error_string(sslerr),
ERR_GET_LIB(sslerr),
ERR_lib_error_string(sslerr),
ERR_GET_FUNC(sslerr),
ERR_func_error_string(sslerr));
}
}
}
leave:
@ -2700,6 +2969,8 @@ pxy_conn_connect(pxy_conn_ctx_t *ctx)
pxy_conn_ctx_free(ctx);
return;
}
log_dbg_printf(">>>>> pxy_conn_connect: <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< bufferevent_enable(ctx->dst.bev)\n");
bufferevent_enable(ctx->dst.bev, EV_READ|EV_WRITE);
if (OPTS_DEBUG(ctx->opts)) {
char *host, *port;
@ -2929,8 +3200,18 @@ pxy_conn_setup(evutil_socket_t fd,
}
}
// log_dbg_printf(">>>>> pxy_conn_setup() pxy_fd_readcb\n");
// pxy_fd_readcb(fd, 0, ctx);
/* for SSL, defer dst connection setup to initial_readcb */
if (ctx->spec->ssl) {
ctx->ev = event_new(ctx->evbase, fd, EV_READ, pxy_fd_readcb, ctx);
// if (!ctx->ev)
// goto memout;
event_add(ctx->ev, NULL);
} else {
log_dbg_printf(">>>>> pxy_conn_setup() pxy_fd_readcb\n");
pxy_fd_readcb(fd, 0, ctx);
}
if (!ctx) {
log_dbg_printf(">>>>> pxy_conn_setup: NULL CTX\n");
@ -2972,8 +3253,35 @@ pxy_conn_setup_e2(evutil_socket_t fd,
ctx->mctx = mctx;
ctx->child_ctx = NULL;
// log_dbg_printf(">>>>> pxy_conn_setup_e2: pxy_bufferevent_setup_e2 for dst.bev, fd=%d\n", fd);
// ctx->dst.bev = pxy_bufferevent_setup_e2(ctx, -1, parent_ctx->dst.ssl);
if (ctx->spec->ssl && !ctx->passthrough) {
ctx->dst.ssl = pxy_dstssl_create(ctx);
if (!ctx->dst.ssl) {
log_dbg_printf(">>>>> pxy_conn_setup_e2: ctx->dst.ssl NULL, fd=%d\n", fd);
// log_err_printf("Error creating SSL\n");
// evutil_closesocket(ctx->fd);
// pxy_conn_ctx_free(ctx);
// return;
}
}
// log_dbg_printf(">>>>> pxy_conn_connect: pxy_bufferevent_setup for dst fd=%d\n", ctx->fd);
// ctx->dst.bev = pxy_bufferevent_setup(ctx, -1, ctx->dst.ssl);
log_dbg_printf(">>>>> pxy_conn_setup_e2: pxy_bufferevent_setup_e2 for dst.bev, fd=%d\n", fd);
ctx->dst.bev = pxy_bufferevent_setup_e2(ctx, -1, parent_ctx->dst.ssl);
ctx->dst.bev = pxy_bufferevent_setup_e2(ctx, -1, ctx->dst.ssl);
if (!ctx->dst.bev) {
if (ctx->dst.ssl) {
SSL_free(ctx->dst.ssl);
ctx->dst.ssl = NULL;
}
evutil_closesocket(ctx->fd);
pxy_conn_ctx_free(ctx);
return;
}
log_dbg_printf(">>>>> pxy_conn_setup_e2: <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< bufferevent_enable(ctx->dst.bev)\n");
bufferevent_enable(ctx->dst.bev, EV_READ|EV_WRITE);
/* initiate connection */
log_dbg_printf(">>>>> pxy_conn_setup_e2: bufferevent_socket_connect dst.bev\n");