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-rw-r--r--tests/pytests/rehandshake/Makefile28
-rw-r--r--tests/pytests/rehandshake/array.h166
-rw-r--r--tests/pytests/rehandshake/tcp-proxy.c336
-rw-r--r--tests/pytests/rehandshake/tcp-proxy.h12
-rw-r--r--tests/pytests/rehandshake/tcproxy.c25
-rw-r--r--tests/pytests/rehandshake/tls-proxy.c848
-rw-r--r--tests/pytests/rehandshake/tls-proxy.h14
-rw-r--r--tests/pytests/rehandshake/tlsproxy.c31
8 files changed, 1460 insertions, 0 deletions
diff --git a/tests/pytests/rehandshake/Makefile b/tests/pytests/rehandshake/Makefile
new file mode 100644
index 0000000..170b89e
--- /dev/null
+++ b/tests/pytests/rehandshake/Makefile
@@ -0,0 +1,28 @@
+CC=gcc
+CFLAGS_TLS=-DDEBUG -ggdb3 -O0 -lgnutls -luv
+CFLAGS_TCP=-DDEBUG -ggdb3 -O0 -luv
+
+all: tcproxy tlsproxy
+
+tlsproxy: tls-proxy.o tlsproxy.o
+ $(CC) tls-proxy.o tlsproxy.o -o tlsproxy $(CFLAGS_TLS)
+
+tls-proxy.o: tls-proxy.c tls-proxy.h array.h
+ $(CC) -c -o $@ $< $(CFLAGS_TLS)
+
+tlsproxy.o: tlsproxy.c tls-proxy.h
+ $(CC) -c -o $@ $< $(CFLAGS_TLS)
+
+tcproxy: tcp-proxy.o tcproxy.o
+ $(CC) tcp-proxy.o tcproxy.o -o tcproxy $(CFLAGS_TCP)
+
+tcp-proxy.o: tcp-proxy.c tcp-proxy.h array.h
+ $(CC) -c -o $@ $< $(CFLAGS_TCP)
+
+tcproxy.o: tcproxy.c tcp-proxy.h
+ $(CC) -c -o $@ $< $(CFLAGS_TCP)
+
+clean:
+ rm -f tcp-proxy.o tcproxy.o tcproxy tls-proxy.o tlsproxy.o tlsproxy
+
+.PHONY: all clean
diff --git a/tests/pytests/rehandshake/array.h b/tests/pytests/rehandshake/array.h
new file mode 100644
index 0000000..ece4dd1
--- /dev/null
+++ b/tests/pytests/rehandshake/array.h
@@ -0,0 +1,166 @@
+/* Copyright (C) 2015-2017 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program 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 General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+/**
+ *
+ * @file array.h
+ * @brief A set of simple macros to make working with dynamic arrays easier.
+ *
+ * @note The C has no generics, so it is implemented mostly using macros.
+ * Be aware of that, as direct usage of the macros in the evaluating macros
+ * may lead to different expectations:
+ *
+ * @code{.c}
+ * MIN(array_push(arr, val), other)
+ * @endcode
+ *
+ * May evaluate the code twice, leading to unexpected behaviour.
+ * This is a price to pay for the absence of proper generics.
+ *
+ * # Example usage:
+ *
+ * @code{.c}
+ * array_t(const char*) arr;
+ * array_init(arr);
+ *
+ * // Reserve memory in advance
+ * if (array_reserve(arr, 2) < 0) {
+ * return ENOMEM;
+ * }
+ *
+ * // Already reserved, cannot fail
+ * array_push(arr, "princess");
+ * array_push(arr, "leia");
+ *
+ * // Not reserved, may fail
+ * if (array_push(arr, "han") < 0) {
+ * return ENOMEM;
+ * }
+ *
+ * // It does not hide what it really is
+ * for (size_t i = 0; i < arr.len; ++i) {
+ * printf("%s\n", arr.at[i]);
+ * }
+ *
+ * // Random delete
+ * array_del(arr, 0);
+ * @endcode
+ * \addtogroup generics
+ * @{
+ */
+
+#pragma once
+#include <stdlib.h>
+
+/** Simplified Qt containers growth strategy. */
+static inline size_t array_next_count(size_t want)
+{
+ if (want < 2048) {
+ return (want < 20) ? want + 4 : want * 2;
+ } else {
+ return want + 2048;
+ }
+}
+
+/** @internal Incremental memory reservation */
+static inline int array_std_reserve(void *baton, char **mem, size_t elm_size, size_t want, size_t *have)
+{
+ if (*have >= want) {
+ return 0;
+ }
+ /* Simplified Qt containers growth strategy */
+ size_t next_size = array_next_count(want);
+ void *mem_new = realloc(*mem, next_size * elm_size);
+ if (mem_new != NULL) {
+ *mem = mem_new;
+ *have = next_size;
+ return 0;
+ }
+ return -1;
+}
+
+/** @internal Wrapper for stdlib free. */
+static inline void array_std_free(void *baton, void *p)
+{
+ free(p);
+}
+
+/** Declare an array structure. */
+#define array_t(type) struct {type * at; size_t len; size_t cap; }
+
+/** Zero-initialize the array. */
+#define array_init(array) ((array).at = NULL, (array).len = (array).cap = 0)
+
+/** Free and zero-initialize the array (plain malloc/free). */
+#define array_clear(array) \
+ array_clear_mm(array, array_std_free, NULL)
+
+/** Make the array empty and free pointed-to memory.
+ * Mempool usage: pass mm_free and a knot_mm_t* . */
+#define array_clear_mm(array, free, baton) \
+ (free)((baton), (array).at), array_init(array)
+
+/** Reserve capacity for at least n elements.
+ * @return 0 if success, <0 on failure */
+#define array_reserve(array, n) \
+ array_reserve_mm(array, n, array_std_reserve, NULL)
+
+/** Reserve capacity for at least n elements.
+ * Mempool usage: pass kr_memreserve and a knot_mm_t* .
+ * @return 0 if success, <0 on failure */
+#define array_reserve_mm(array, n, reserve, baton) \
+ (reserve)((baton), (char **) &(array).at, sizeof((array).at[0]), (n), &(array).cap)
+
+/**
+ * Push value at the end of the array, resize it if necessary.
+ * Mempool usage: pass kr_memreserve and a knot_mm_t* .
+ * @note May fail if the capacity is not reserved.
+ * @return element index on success, <0 on failure
+ */
+#define array_push_mm(array, val, reserve, baton) \
+ (int)((array).len < (array).cap ? ((array).at[(array).len] = val, (array).len++) \
+ : (array_reserve_mm(array, ((array).cap + 1), reserve, baton) < 0 ? -1 \
+ : ((array).at[(array).len] = val, (array).len++)))
+
+/**
+ * Push value at the end of the array, resize it if necessary (plain malloc/free).
+ * @note May fail if the capacity is not reserved.
+ * @return element index on success, <0 on failure
+ */
+#define array_push(array, val) \
+ array_push_mm(array, val, array_std_reserve, NULL)
+
+/**
+ * Pop value from the end of the array.
+ */
+#define array_pop(array) \
+ (array).len -= 1
+
+/**
+ * Remove value at given index.
+ * @return 0 on success, <0 on failure
+ */
+#define array_del(array, i) \
+ (int)((i) < (array).len ? ((array).len -= 1,(array).at[i] = (array).at[(array).len], 0) : -1)
+
+/**
+ * Return last element of the array.
+ * @warning Undefined if the array is empty.
+ */
+#define array_tail(array) \
+ (array).at[(array).len - 1]
+
+/** @} */
diff --git a/tests/pytests/rehandshake/tcp-proxy.c b/tests/pytests/rehandshake/tcp-proxy.c
new file mode 100644
index 0000000..ba7198b
--- /dev/null
+++ b/tests/pytests/rehandshake/tcp-proxy.c
@@ -0,0 +1,336 @@
+#include <assert.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdbool.h>
+#include <uv.h>
+#include "array.h"
+
+struct buf {
+ char buf[16 * 1024];
+ size_t size;
+};
+
+enum peer_state {
+ STATE_NOT_CONNECTED,
+ STATE_LISTENING,
+ STATE_CONNECTED,
+ STATE_CONNECT_IN_PROGRESS,
+ STATE_CLOSING_IN_PROGRESS
+};
+
+struct proxy_ctx {
+ uv_loop_t *loop;
+ uv_tcp_t server;
+ uv_tcp_t client;
+ uv_tcp_t upstream;
+ struct sockaddr_storage server_addr;
+ struct sockaddr_storage upstream_addr;
+
+ int server_state;
+ int client_state;
+ int upstream_state;
+
+ array_t(struct buf *) buffer_pool;
+ array_t(struct buf *) upstream_pending;
+};
+
+static void read_from_upstream_cb(uv_stream_t *upstream, ssize_t nread, const uv_buf_t *buf);
+static void read_from_client_cb(uv_stream_t *client, ssize_t nread, const uv_buf_t *buf);
+
+static struct buf *borrow_io_buffer(struct proxy_ctx *proxy)
+{
+ struct buf *buf = NULL;
+ if (proxy->buffer_pool.len > 0) {
+ buf = array_tail(proxy->buffer_pool);
+ array_pop(proxy->buffer_pool);
+ } else {
+ buf = calloc(1, sizeof (struct buf));
+ }
+ return buf;
+}
+
+static void release_io_buffer(struct proxy_ctx *proxy, struct buf *buf)
+{
+ if (!buf) {
+ return;
+ }
+
+ if (proxy->buffer_pool.len < 1000) {
+ buf->size = 0;
+ array_push(proxy->buffer_pool, buf);
+ } else {
+ free(buf);
+ }
+}
+
+static void push_to_upstream_pending(struct proxy_ctx *proxy, const char *buf, size_t size)
+{
+ while (size > 0) {
+ struct buf *b = borrow_io_buffer(proxy);
+ b->size = size <= sizeof(b->buf) ? size : sizeof(b->buf);
+ memcpy(b->buf, buf, b->size);
+ array_push(proxy->upstream_pending, b);
+ size -= b->size;
+ }
+}
+
+static struct buf *get_first_upstream_pending(struct proxy_ctx *proxy)
+{
+ struct buf *buf = NULL;
+ if (proxy->upstream_pending.len > 0) {
+ buf = proxy->upstream_pending.at[0];
+ }
+ return buf;
+}
+
+static void remove_first_upstream_pending(struct proxy_ctx *proxy)
+{
+ for (int i = 1; i < proxy->upstream_pending.len; ++i) {
+ proxy->upstream_pending.at[i - 1] = proxy->upstream_pending.at[i];
+ }
+ if (proxy->upstream_pending.len > 0) {
+ proxy->upstream_pending.len -= 1;
+ }
+}
+
+static void clear_upstream_pending(struct proxy_ctx *proxy)
+{
+ for (int i = 1; i < proxy->upstream_pending.len; ++i) {
+ struct buf *b = proxy->upstream_pending.at[i];
+ release_io_buffer(proxy, b);
+ }
+ proxy->upstream_pending.len = 0;
+}
+
+static void clear_buffer_pool(struct proxy_ctx *proxy)
+{
+ for (int i = 1; i < proxy->buffer_pool.len; ++i) {
+ struct buf *b = proxy->buffer_pool.at[i];
+ free(b);
+ }
+ proxy->buffer_pool.len = 0;
+}
+
+static void alloc_uv_buffer(uv_handle_t *handle, size_t suggested_size, uv_buf_t *buf)
+{
+ buf->base = (char*)malloc(suggested_size);
+ buf->len = suggested_size;
+}
+
+static void on_client_close(uv_handle_t *handle)
+{
+ struct proxy_ctx *proxy = (struct proxy_ctx *)handle->loop->data;
+ proxy->client_state = STATE_NOT_CONNECTED;
+}
+
+static void on_upstream_close(uv_handle_t *handle)
+{
+ struct proxy_ctx *proxy = (struct proxy_ctx *)handle->loop->data;
+ proxy->upstream_state = STATE_NOT_CONNECTED;
+}
+
+static void write_to_client_cb(uv_write_t *req, int status)
+{
+ struct proxy_ctx *proxy = (struct proxy_ctx *)req->handle->loop->data;
+ free(req);
+ if (status) {
+ fprintf(stderr, "error writing to client: %s\n", uv_strerror(status));
+ clear_upstream_pending(proxy);
+ proxy->client_state = STATE_CLOSING_IN_PROGRESS;
+ uv_close((uv_handle_t*)&proxy->client, on_client_close);
+ }
+}
+
+static void write_to_upstream_cb(uv_write_t *req, int status)
+{
+ struct proxy_ctx *proxy = (struct proxy_ctx *)req->handle->loop->data;
+ free(req);
+ if (status) {
+ fprintf(stderr, "error writing to upstream: %s\n", uv_strerror(status));
+ clear_upstream_pending(proxy);
+ proxy->upstream_state = STATE_CLOSING_IN_PROGRESS;
+ uv_close((uv_handle_t*)&proxy->upstream, on_upstream_close);
+ return;
+ }
+ if (proxy->upstream_pending.len > 0) {
+ struct buf *buf = get_first_upstream_pending(proxy);
+ remove_first_upstream_pending(proxy);
+ release_io_buffer(proxy, buf);
+ if (proxy->upstream_state == STATE_CONNECTED &&
+ proxy->upstream_pending.len > 0) {
+ buf = get_first_upstream_pending(proxy);
+ /* TODO avoid allocation */
+ uv_write_t *req = (uv_write_t *) malloc(sizeof(uv_write_t));
+ uv_buf_t wrbuf = uv_buf_init(buf->buf, buf->size);
+ uv_write(req, (uv_stream_t *)&proxy->upstream, &wrbuf, 1, write_to_upstream_cb);
+ }
+ }
+}
+
+static void on_client_connection(uv_stream_t *server, int status)
+{
+ if (status < 0) {
+ fprintf(stderr, "incoming connection error: %s\n", uv_strerror(status));
+ return;
+ }
+
+ fprintf(stdout, "incoming connection\n");
+
+ struct proxy_ctx *proxy = (struct proxy_ctx *)server->loop->data;
+ if (proxy->client_state != STATE_NOT_CONNECTED) {
+ fprintf(stderr, "client already connected, ignoring\n");
+ return;
+ }
+
+ uv_tcp_init(proxy->loop, &proxy->client);
+ proxy->client_state = STATE_CONNECTED;
+ if (uv_accept(server, (uv_stream_t*)&proxy->client) == 0) {
+ uv_read_start((uv_stream_t*)&proxy->client, alloc_uv_buffer, read_from_client_cb);
+ } else {
+ proxy->client_state = STATE_CLOSING_IN_PROGRESS;
+ uv_close((uv_handle_t*)&proxy->client, on_client_close);
+ }
+}
+
+static void on_connect_to_upstream(uv_connect_t *req, int status)
+{
+ struct proxy_ctx *proxy = (struct proxy_ctx *)req->handle->loop->data;
+ free(req);
+ if (status < 0) {
+ fprintf(stderr, "error connecting to upstream: %s\n", uv_strerror(status));
+ clear_upstream_pending(proxy);
+ proxy->upstream_state = STATE_CLOSING_IN_PROGRESS;
+ uv_close((uv_handle_t*)&proxy->upstream, on_upstream_close);
+ return;
+ }
+
+ proxy->upstream_state = STATE_CONNECTED;
+ uv_read_start((uv_stream_t*)&proxy->upstream, alloc_uv_buffer, read_from_upstream_cb);
+ if (proxy->upstream_pending.len > 0) {
+ struct buf *buf = get_first_upstream_pending(proxy);
+ /* TODO avoid allocation */
+ uv_write_t *wreq = (uv_write_t *) malloc(sizeof(uv_write_t));
+ uv_buf_t wrbuf = uv_buf_init(buf->buf, buf->size);
+ uv_write(wreq, (uv_stream_t *)&proxy->upstream, &wrbuf, 1, write_to_upstream_cb);
+ }
+}
+
+static void read_from_client_cb(uv_stream_t *client, ssize_t nread, const uv_buf_t *buf)
+{
+ if (nread == 0) {
+ return;
+ }
+ struct proxy_ctx *proxy = (struct proxy_ctx *)client->loop->data;
+ if (nread < 0) {
+ if (nread != UV_EOF) {
+ fprintf(stderr, "error reading from client: %s\n", uv_err_name(nread));
+ }
+ if (proxy->client_state == STATE_CONNECTED) {
+ proxy->client_state = STATE_CLOSING_IN_PROGRESS;
+ uv_close((uv_handle_t*) client, on_client_close);
+ }
+ return;
+ }
+ if (proxy->upstream_state == STATE_CONNECTED) {
+ if (proxy->upstream_pending.len > 0) {
+ push_to_upstream_pending(proxy, buf->base, nread);
+ } else {
+ /* TODO avoid allocation */
+ uv_write_t *req = (uv_write_t *) malloc(sizeof(uv_write_t));
+ uv_buf_t wrbuf = uv_buf_init(buf->base, nread);
+ uv_write(req, (uv_stream_t *)&proxy->upstream, &wrbuf, 1, write_to_upstream_cb);
+ }
+ } else if (proxy->upstream_state == STATE_NOT_CONNECTED) {
+ /* TODO avoid allocation */
+ uv_tcp_init(proxy->loop, &proxy->upstream);
+ uv_connect_t *conn = (uv_connect_t *) malloc(sizeof(uv_connect_t));
+ proxy->upstream_state = STATE_CONNECT_IN_PROGRESS;
+ uv_tcp_connect(conn, &proxy->upstream, (struct sockaddr *)&proxy->upstream_addr,
+ on_connect_to_upstream);
+ push_to_upstream_pending(proxy, buf->base, nread);
+ } else if (proxy->upstream_state == STATE_CONNECT_IN_PROGRESS) {
+ push_to_upstream_pending(proxy, buf->base, nread);
+ }
+}
+
+static void read_from_upstream_cb(uv_stream_t *upstream, ssize_t nread, const uv_buf_t *buf)
+{
+ if (nread == 0) {
+ return;
+ }
+ struct proxy_ctx *proxy = (struct proxy_ctx *)upstream->loop->data;
+ if (nread < 0) {
+ if (nread != UV_EOF) {
+ fprintf(stderr, "error reading from upstream: %s\n", uv_err_name(nread));
+ }
+ clear_upstream_pending(proxy);
+ if (proxy->upstream_state == STATE_CONNECTED) {
+ proxy->upstream_state = STATE_CLOSING_IN_PROGRESS;
+ uv_close((uv_handle_t*)&proxy->upstream, on_upstream_close);
+ }
+ return;
+ }
+ if (proxy->client_state == STATE_CONNECTED) {
+ /* TODO Avoid allocation */
+ uv_write_t *req = (uv_write_t *) malloc(sizeof(uv_write_t));
+ uv_buf_t wrbuf = uv_buf_init(buf->base, nread);
+ uv_write(req, (uv_stream_t *)&proxy->client, &wrbuf, 1, write_to_client_cb);
+ }
+}
+
+struct proxy_ctx *proxy_allocate()
+{
+ return malloc(sizeof(struct proxy_ctx));
+}
+
+int proxy_init(struct proxy_ctx *proxy,
+ const char *server_addr, int server_port,
+ const char *upstream_addr, int upstream_port)
+{
+ proxy->loop = uv_default_loop();
+ uv_tcp_init(proxy->loop, &proxy->server);
+ int res = uv_ip4_addr(server_addr, server_port, (struct sockaddr_in *)&proxy->server_addr);
+ if (res != 0) {
+ return res;
+ }
+ res = uv_ip4_addr(upstream_addr, upstream_port, (struct sockaddr_in *)&proxy->upstream_addr);
+ if (res != 0) {
+ return res;
+ }
+ array_init(proxy->buffer_pool);
+ array_init(proxy->upstream_pending);
+ proxy->server_state = STATE_NOT_CONNECTED;
+ proxy->client_state = STATE_NOT_CONNECTED;
+ proxy->upstream_state = STATE_NOT_CONNECTED;
+
+ proxy->loop->data = proxy;
+ return 0;
+}
+
+void proxy_free(struct proxy_ctx *proxy)
+{
+ if (!proxy) {
+ return;
+ }
+ clear_upstream_pending(proxy);
+ clear_buffer_pool(proxy);
+ /* TODO correctly close all the uv_tcp_t */
+ free(proxy);
+}
+
+int proxy_start_listen(struct proxy_ctx *proxy)
+{
+ uv_tcp_bind(&proxy->server, (const struct sockaddr*)&proxy->server_addr, 0);
+ int ret = uv_listen((uv_stream_t*)&proxy->server, 128, on_client_connection);
+ if (ret == 0) {
+ proxy->server_state = STATE_LISTENING;
+ }
+ return ret;
+}
+
+int proxy_run(struct proxy_ctx *proxy)
+{
+ return uv_run(proxy->loop, UV_RUN_DEFAULT);
+}
diff --git a/tests/pytests/rehandshake/tcp-proxy.h b/tests/pytests/rehandshake/tcp-proxy.h
new file mode 100644
index 0000000..668a65f
--- /dev/null
+++ b/tests/pytests/rehandshake/tcp-proxy.h
@@ -0,0 +1,12 @@
+#pragma once
+
+struct proxy_ctx;
+
+struct proxy_ctx *proxy_allocate();
+void proxy_free(struct proxy_ctx *proxy);
+int proxy_init(struct proxy_ctx *proxy,
+ const char *server_addr, int server_port,
+ const char *upstream_addr, int upstream_port);
+int proxy_start_listen(struct proxy_ctx *proxy);
+int proxy_run(struct proxy_ctx *proxy);
+
diff --git a/tests/pytests/rehandshake/tcproxy.c b/tests/pytests/rehandshake/tcproxy.c
new file mode 100644
index 0000000..87a6b4c
--- /dev/null
+++ b/tests/pytests/rehandshake/tcproxy.c
@@ -0,0 +1,25 @@
+#include <stdio.h>
+#include "tcp-proxy.h"
+
+int main()
+{
+ struct proxy_ctx *proxy = proxy_allocate();
+ if (!proxy) {
+ fprintf(stderr, "can't allocate proxy structure\n");
+ return 1;
+ }
+ int res = proxy_init(proxy, "127.0.0.1", 54000, "127.0.0.1", 53001);
+ if (res) {
+ fprintf(stderr, "can't initialize proxy by given addresses\n");
+ return res;
+ }
+ res = proxy_start_listen(proxy);
+ if (res) {
+ fprintf(stderr, "error starting listen, error code: %i\n", res);
+ return res;
+ }
+ res = proxy_run(proxy);
+ proxy_free(proxy);
+ return res;
+}
+
diff --git a/tests/pytests/rehandshake/tls-proxy.c b/tests/pytests/rehandshake/tls-proxy.c
new file mode 100644
index 0000000..bf6cc0d
--- /dev/null
+++ b/tests/pytests/rehandshake/tls-proxy.c
@@ -0,0 +1,848 @@
+#include <assert.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdbool.h>
+#include <gnutls/gnutls.h>
+#include <uv.h>
+#include "array.h"
+
+#define TLS_MAX_SEND_RETRIES 100
+#define CLIENT_ANSWER_CHUNK_SIZE 8
+struct buf {
+ char buf[16 * 1024];
+ size_t size;
+};
+
+enum peer_state {
+ STATE_NOT_CONNECTED,
+ STATE_LISTENING,
+ STATE_CONNECTED,
+ STATE_CONNECT_IN_PROGRESS,
+ STATE_CLOSING_IN_PROGRESS
+};
+
+enum handshake_state {
+ TLS_HS_NOT_STARTED = 0,
+ TLS_HS_EXPECTED,
+ TLS_HS_IN_PROGRESS,
+ TLS_HS_DONE,
+ TLS_HS_CLOSING,
+ TLS_HS_LAST
+};
+
+struct tls_ctx {
+ gnutls_session_t session;
+ int handshake_state;
+ gnutls_certificate_credentials_t credentials;
+ gnutls_priority_t priority_cache;
+ /* for reading from the network */
+ const uint8_t *buf;
+ ssize_t nread;
+ ssize_t consumed;
+ uint8_t recv_buf[4096];
+};
+
+struct tls_proxy_ctx {
+ uv_loop_t *loop;
+ uv_tcp_t server;
+ uv_tcp_t client;
+ uv_tcp_t upstream;
+ struct sockaddr_storage server_addr;
+ struct sockaddr_storage upstream_addr;
+ struct sockaddr_storage client_addr;
+
+ int server_state;
+ int client_state;
+ int upstream_state;
+
+ array_t(struct buf *) buffer_pool;
+ array_t(struct buf *) upstream_pending;
+ array_t(struct buf *) client_pending;
+
+ char io_buf[0xFFFF];
+ struct tls_ctx tls;
+};
+
+static void read_from_upstream_cb(uv_stream_t *upstream, ssize_t nread, const uv_buf_t *buf);
+static void read_from_client_cb(uv_stream_t *client, ssize_t nread, const uv_buf_t *buf);
+static ssize_t proxy_gnutls_pull(gnutls_transport_ptr_t h, void *buf, size_t len);
+static ssize_t proxy_gnutls_push(gnutls_transport_ptr_t h, const void *buf, size_t len);
+static int tls_process_from_upstream(struct tls_proxy_ctx *proxy, const uint8_t *buf, ssize_t nread);
+static int tls_process_from_client(struct tls_proxy_ctx *proxy, const uint8_t *buf, ssize_t nread);
+static int write_to_upstream_pending(struct tls_proxy_ctx *proxy);
+static int write_to_client_pending(struct tls_proxy_ctx *proxy);
+
+
+static int gnutls_references = 0;
+
+const void *ip_addr(const struct sockaddr *addr)
+{
+ if (!addr) {
+ return NULL;
+ }
+ switch (addr->sa_family) {
+ case AF_INET: return (const void *)&(((const struct sockaddr_in *)addr)->sin_addr);
+ case AF_INET6: return (const void *)&(((const struct sockaddr_in6 *)addr)->sin6_addr);
+ default: return NULL;
+ }
+}
+
+uint16_t ip_addr_port(const struct sockaddr *addr)
+{
+ if (!addr) {
+ return 0;
+ }
+ switch (addr->sa_family) {
+ case AF_INET: return ntohs(((const struct sockaddr_in *)addr)->sin_port);
+ case AF_INET6: return ntohs(((const struct sockaddr_in6 *)addr)->sin6_port);
+ default: return 0;
+ }
+}
+
+static int ip_addr_str(const struct sockaddr *addr, char *buf, size_t *buflen)
+{
+ int ret = 0;
+ if (!addr || !buf || !buflen) {
+ return EINVAL;
+ }
+
+ char str[INET6_ADDRSTRLEN + 6];
+ if (!inet_ntop(addr->sa_family, ip_addr(addr), str, sizeof(str))) {
+ return errno;
+ }
+ int len = strlen(str);
+ str[len] = '#';
+ snprintf(&str[len + 1], 6, "%uh", ip_addr_port(addr));
+ len += 6;
+ str[len] = 0;
+ if (len >= *buflen) {
+ ret = ENOSPC;
+ } else {
+ memcpy(buf, str, len + 1);
+ }
+ *buflen = len;
+ return ret;
+}
+
+static inline char *ip_straddr(const struct sockaddr *addr)
+{
+ assert(addr != NULL);
+ /* We are the sinle-threaded application */
+ static char str[INET6_ADDRSTRLEN + 6];
+ size_t len = sizeof(str);
+ int ret = ip_addr_str(addr, str, &len);
+ return ret != 0 || len == 0 ? NULL : str;
+}
+
+static struct buf *borrow_io_buffer(struct tls_proxy_ctx *proxy)
+{
+ struct buf *buf = NULL;
+ if (proxy->buffer_pool.len > 0) {
+ buf = array_tail(proxy->buffer_pool);
+ array_pop(proxy->buffer_pool);
+ } else {
+ buf = calloc(1, sizeof (struct buf));
+ }
+ return buf;
+}
+
+static void release_io_buffer(struct tls_proxy_ctx *proxy, struct buf *buf)
+{
+ if (!buf) {
+ return;
+ }
+
+ if (proxy->buffer_pool.len < 1000) {
+ buf->size = 0;
+ array_push(proxy->buffer_pool, buf);
+ } else {
+ free(buf);
+ }
+}
+
+static struct buf *get_first_upstream_pending(struct tls_proxy_ctx *proxy)
+{
+ struct buf *buf = NULL;
+ if (proxy->upstream_pending.len > 0) {
+ buf = proxy->upstream_pending.at[0];
+ }
+ return buf;
+}
+
+static struct buf *get_first_client_pending(struct tls_proxy_ctx *proxy)
+{
+ struct buf *buf = NULL;
+ if (proxy->client_pending.len > 0) {
+ buf = proxy->client_pending.at[0];
+ }
+ return buf;
+}
+
+static void remove_first_upstream_pending(struct tls_proxy_ctx *proxy)
+{
+ for (int i = 1; i < proxy->upstream_pending.len; ++i) {
+ proxy->upstream_pending.at[i - 1] = proxy->upstream_pending.at[i];
+ }
+ if (proxy->upstream_pending.len > 0) {
+ proxy->upstream_pending.len -= 1;
+ }
+}
+
+static void remove_first_client_pending(struct tls_proxy_ctx *proxy)
+{
+ for (int i = 1; i < proxy->client_pending.len; ++i) {
+ proxy->client_pending.at[i - 1] = proxy->client_pending.at[i];
+ }
+ if (proxy->client_pending.len > 0) {
+ proxy->client_pending.len -= 1;
+ }
+}
+
+static void clear_upstream_pending(struct tls_proxy_ctx *proxy)
+{
+ for (int i = 0; i < proxy->upstream_pending.len; ++i) {
+ struct buf *b = proxy->upstream_pending.at[i];
+ release_io_buffer(proxy, b);
+ }
+ proxy->upstream_pending.len = 0;
+}
+
+static void clear_client_pending(struct tls_proxy_ctx *proxy)
+{
+ for (int i = 0; i < proxy->client_pending.len; ++i) {
+ struct buf *b = proxy->client_pending.at[i];
+ release_io_buffer(proxy, b);
+ }
+ proxy->client_pending.len = 0;
+}
+
+static void clear_buffer_pool(struct tls_proxy_ctx *proxy)
+{
+ for (int i = 0; i < proxy->buffer_pool.len; ++i) {
+ struct buf *b = proxy->buffer_pool.at[i];
+ free(b);
+ }
+ proxy->buffer_pool.len = 0;
+}
+
+static void alloc_uv_buffer(uv_handle_t *handle, size_t suggested_size, uv_buf_t *buf)
+{
+ struct tls_proxy_ctx *proxy = (struct tls_proxy_ctx *)handle->loop->data;
+ buf->base = proxy->io_buf;
+ buf->len = sizeof(proxy->io_buf);
+}
+
+static void on_client_close(uv_handle_t *handle)
+{
+ struct tls_proxy_ctx *proxy = (struct tls_proxy_ctx *)handle->loop->data;
+ gnutls_deinit(proxy->tls.session);
+ proxy->tls.handshake_state = TLS_HS_NOT_STARTED;
+ proxy->client_state = STATE_NOT_CONNECTED;
+}
+
+static void on_dummmy_client_close(uv_handle_t *handle)
+{
+ free(handle);
+}
+
+static void on_upstream_close(uv_handle_t *handle)
+{
+ struct tls_proxy_ctx *proxy = (struct tls_proxy_ctx *)handle->loop->data;
+ proxy->upstream_state = STATE_NOT_CONNECTED;
+}
+
+static void write_to_client_cb(uv_write_t *req, int status)
+{
+ struct tls_proxy_ctx *proxy = (struct tls_proxy_ctx *)req->handle->loop->data;
+ free(req);
+ if (status) {
+ fprintf(stderr, "error writing to client: %s\n", uv_strerror(status));
+ clear_client_pending(proxy);
+ clear_upstream_pending(proxy);
+ if (proxy->client_state == STATE_CONNECTED) {
+ proxy->client_state = STATE_CLOSING_IN_PROGRESS;
+ uv_close((uv_handle_t*)&proxy->client, on_client_close);
+ return;
+ }
+ }
+ fprintf(stdout, "successfully wrote to client, pending len is %zd\n",
+ proxy->client_pending.len);
+ if (proxy->client_state == STATE_CONNECTED &&
+ proxy->tls.handshake_state == TLS_HS_DONE) {
+ write_to_client_pending(proxy);
+ }
+}
+
+static void write_to_upstream_cb(uv_write_t *req, int status)
+{
+ struct tls_proxy_ctx *proxy = (struct tls_proxy_ctx *)req->handle->loop->data;
+ if (status) {
+ free(req);
+ fprintf(stderr, "error writing to upstream: %s\n", uv_strerror(status));
+ clear_upstream_pending(proxy);
+ proxy->upstream_state = STATE_CLOSING_IN_PROGRESS;
+ uv_close((uv_handle_t*)&proxy->upstream, on_upstream_close);
+ return;
+ }
+ if (req->data != NULL) {
+ assert(proxy->upstream_pending.len > 0);
+ struct buf *buf = get_first_upstream_pending(proxy);
+ assert(req->data == (void *)buf->buf);
+ fprintf(stdout, "successfully wrote %zi bytes to upstream, pending len is %zd\n",
+ buf->size, proxy->upstream_pending.len);
+ remove_first_upstream_pending(proxy);
+ release_io_buffer(proxy, buf);
+ } else {
+ fprintf(stdout, "successfully wrote bytes to upstream, pending len is %zd\n",
+ proxy->upstream_pending.len);
+ }
+ if (proxy->upstream_state == STATE_CONNECTED &&
+ proxy->upstream_pending.len > 0) {
+ write_to_upstream_pending(proxy);
+ }
+ free(req);
+}
+
+static void on_client_connection(uv_stream_t *server, int status)
+{
+ if (status < 0) {
+ fprintf(stderr, "incoming connection error: %s\n", uv_strerror(status));
+ return;
+ }
+
+ int err = 0;
+ int ret = 0;
+ struct tls_proxy_ctx *proxy = (struct tls_proxy_ctx *)server->loop->data;
+ if (proxy->client_state != STATE_NOT_CONNECTED) {
+ fprintf(stderr, "incoming connection");
+ uv_tcp_t *dummy_client = malloc(sizeof(uv_tcp_t));
+ uv_tcp_init(proxy->loop, dummy_client);
+ err = uv_accept(server, (uv_stream_t*)dummy_client);
+ if (err == 0) {
+ struct sockaddr dummy_addr;
+ int dummy_addr_len = sizeof(dummy_addr);
+ ret = uv_tcp_getpeername(dummy_client,
+ &dummy_addr,
+ &dummy_addr_len);
+ if (ret == 0) {
+ fprintf(stderr, " from %s", ip_straddr(&dummy_addr));
+ }
+ uv_close((uv_handle_t *)dummy_client, on_dummmy_client_close);
+ } else {
+ on_dummmy_client_close((uv_handle_t *)dummy_client);
+ }
+ fprintf(stderr, " - client already connected, rejecting\n");
+ return;
+ }
+
+ uv_tcp_init(proxy->loop, &proxy->client);
+ uv_tcp_nodelay((uv_tcp_t *)&proxy->client, 1);
+ proxy->client_state = STATE_CONNECTED;
+ err = uv_accept(server, (uv_stream_t*)&proxy->client);
+ if (err != 0) {
+ fprintf(stderr, "incoming connection - uv_accept() failed: (%d) %s\n",
+ err, uv_strerror(err));
+ return;
+ }
+
+ struct sockaddr *addr = (struct sockaddr *)&(proxy->client_addr);
+ int addr_len = sizeof(proxy->client_addr);
+ ret = uv_tcp_getpeername(&proxy->client, addr, &addr_len);
+ if (ret || addr->sa_family == AF_UNSPEC) {
+ proxy->client_state = STATE_CLOSING_IN_PROGRESS;
+ uv_close((uv_handle_t*)&proxy->client, on_client_close);
+ fprintf(stderr, "incoming connection - uv_tcp_getpeername() failed: (%d) %s\n",
+ err, uv_strerror(err));
+ return;
+ }
+
+ fprintf(stdout, "incoming connection from %s\n", ip_straddr(addr));
+
+ uv_read_start((uv_stream_t*)&proxy->client, alloc_uv_buffer, read_from_client_cb);
+
+ const char *errpos = NULL;
+ struct tls_ctx *tls = &proxy->tls;
+ assert (tls->handshake_state == TLS_HS_NOT_STARTED);
+ err = gnutls_init(&tls->session, GNUTLS_SERVER | GNUTLS_NONBLOCK);
+ if (err != GNUTLS_E_SUCCESS) {
+ fprintf(stderr, "gnutls_init() failed: (%d) %s\n",
+ err, gnutls_strerror_name(err));
+ }
+ err = gnutls_priority_set(tls->session, tls->priority_cache);
+ if (err != GNUTLS_E_SUCCESS) {
+ fprintf(stderr, "gnutls_priority_set() failed: (%d) %s\n",
+ err, gnutls_strerror_name(err));
+ }
+ err = gnutls_credentials_set(tls->session, GNUTLS_CRD_CERTIFICATE, tls->credentials);
+ if (err != GNUTLS_E_SUCCESS) {
+ fprintf(stderr, "gnutls_credentials_set() failed: (%d) %s\n",
+ err, gnutls_strerror_name(err));
+ }
+ gnutls_certificate_server_set_request(tls->session, GNUTLS_CERT_IGNORE);
+ gnutls_handshake_set_timeout(tls->session, GNUTLS_DEFAULT_HANDSHAKE_TIMEOUT);
+
+ gnutls_transport_set_pull_function(tls->session, proxy_gnutls_pull);
+ gnutls_transport_set_push_function(tls->session, proxy_gnutls_push);
+ gnutls_transport_set_ptr(tls->session, proxy);
+
+ tls->handshake_state = TLS_HS_IN_PROGRESS;
+}
+
+static void on_connect_to_upstream(uv_connect_t *req, int status)
+{
+ struct tls_proxy_ctx *proxy = (struct tls_proxy_ctx *)req->handle->loop->data;
+ free(req);
+ if (status < 0) {
+ fprintf(stderr, "error connecting to upstream (%s): %s\n",
+ ip_straddr((struct sockaddr *)&proxy->upstream_addr),
+ uv_strerror(status));
+ clear_upstream_pending(proxy);
+ proxy->upstream_state = STATE_CLOSING_IN_PROGRESS;
+ uv_close((uv_handle_t*)&proxy->upstream, on_upstream_close);
+ return;
+ }
+ fprintf(stdout, "connected to %s\n", ip_straddr((struct sockaddr *)&proxy->upstream_addr));
+
+ proxy->upstream_state = STATE_CONNECTED;
+ uv_read_start((uv_stream_t*)&proxy->upstream, alloc_uv_buffer, read_from_upstream_cb);
+ if (proxy->upstream_pending.len > 0) {
+ write_to_upstream_pending(proxy);
+ }
+}
+
+static void read_from_client_cb(uv_stream_t *client, ssize_t nread, const uv_buf_t *buf)
+{
+ fprintf(stdout, "reading %zd bytes from client\n", nread);
+ if (nread == 0) {
+ return;
+ }
+ struct tls_proxy_ctx *proxy = (struct tls_proxy_ctx *)client->loop->data;
+ if (nread < 0) {
+ if (nread != UV_EOF) {
+ fprintf(stderr, "error reading from client: %s\n", uv_err_name(nread));
+ } else {
+ fprintf(stdout, "client has closed the connection\n");
+ }
+ if (proxy->client_state == STATE_CONNECTED) {
+ proxy->client_state = STATE_CLOSING_IN_PROGRESS;
+ uv_close((uv_handle_t*) client, on_client_close);
+ }
+ return;
+ }
+
+ int res = tls_process_from_client(proxy, buf->base, nread);
+ if (res < 0) {
+ if (proxy->client_state == STATE_CONNECTED) {
+ proxy->client_state = STATE_CLOSING_IN_PROGRESS;
+ uv_close((uv_handle_t*) client, on_client_close);
+ }
+ }
+}
+
+static void read_from_upstream_cb(uv_stream_t *upstream, ssize_t nread, const uv_buf_t *buf)
+{
+ fprintf(stdout, "reading %zd bytes from upstream\n", nread);
+ if (nread == 0) {
+ return;
+ }
+ struct tls_proxy_ctx *proxy = (struct tls_proxy_ctx *)upstream->loop->data;
+ if (nread < 0) {
+ if (nread != UV_EOF) {
+ fprintf(stderr, "error reading from upstream: %s\n", uv_err_name(nread));
+ } else {
+ fprintf(stdout, "upstream has closed the connection\n");
+ }
+ clear_upstream_pending(proxy);
+ if (proxy->upstream_state == STATE_CONNECTED) {
+ proxy->upstream_state = STATE_CLOSING_IN_PROGRESS;
+ uv_close((uv_handle_t*)&proxy->upstream, on_upstream_close);
+ }
+ return;
+ }
+ int res = tls_process_from_upstream(proxy, buf->base, nread);
+ if (res < 0) {
+ fprintf(stderr, "error sending tls data to client\n");
+ if (proxy->client_state == STATE_CONNECTED) {
+ proxy->client_state = STATE_CLOSING_IN_PROGRESS;
+ uv_close((uv_handle_t*)&proxy->client, on_client_close);
+ }
+ }
+}
+
+static void push_to_upstream_pending(struct tls_proxy_ctx *proxy, const char *buf, size_t size)
+{
+ while (size > 0) {
+ struct buf *b = borrow_io_buffer(proxy);
+ b->size = size <= sizeof(b->buf) ? size : sizeof(b->buf);
+ memcpy(b->buf, buf, b->size);
+ array_push(proxy->upstream_pending, b);
+ size -= b->size;
+ buf += b->size;
+ }
+}
+
+static void push_to_client_pending(struct tls_proxy_ctx *proxy, const char *buf, size_t size)
+{
+ while (size > 0) {
+ struct buf *b = borrow_io_buffer(proxy);
+ b->size = size <= sizeof(b->buf) ? size : sizeof(b->buf);
+ if (b->size > CLIENT_ANSWER_CHUNK_SIZE) {
+ b->size = CLIENT_ANSWER_CHUNK_SIZE;
+ }
+ memcpy(b->buf, buf, b->size);
+ array_push(proxy->client_pending, b);
+ size -= b->size;
+ buf += b->size;
+ }
+}
+
+static int write_to_upstream_pending(struct tls_proxy_ctx *proxy)
+{
+ struct buf *buf = get_first_upstream_pending(proxy);
+ /* TODO avoid allocation */
+ uv_write_t *req = (uv_write_t *) malloc(sizeof(uv_write_t));
+ uv_buf_t wrbuf = uv_buf_init(buf->buf, buf->size);
+ req->data = buf->buf;
+ fprintf(stdout, "writing %zd bytes to upstream\n", buf->size);
+ return uv_write(req, (uv_stream_t *)&proxy->upstream, &wrbuf, 1, write_to_upstream_cb);
+}
+
+static ssize_t proxy_gnutls_pull(gnutls_transport_ptr_t h, void *buf, size_t len)
+{
+ struct tls_proxy_ctx *proxy = (struct tls_proxy_ctx *)h;
+ struct tls_ctx *t = &proxy->tls;
+
+ fprintf(stdout, "\t gnutls: pulling %zd bytes from client\n", len);
+
+ if (t->nread <= t->consumed) {
+ errno = EAGAIN;
+ fprintf(stdout, "\t gnutls: return EAGAIN\n");
+ return -1;
+ }
+
+ ssize_t avail = t->nread - t->consumed;
+ ssize_t transfer = (avail <= len ? avail : len);
+ memcpy(buf, t->buf + t->consumed, transfer);
+ t->consumed += transfer;
+ return transfer;
+}
+
+ssize_t proxy_gnutls_push(gnutls_transport_ptr_t h, const void *buf, size_t len)
+{
+ struct tls_proxy_ctx *proxy = (struct tls_proxy_ctx *)h;
+ struct tls_ctx *t = &proxy->tls;
+ fprintf(stdout, "\t gnutls: writing %zd bytes to client\n", len);
+
+ ssize_t ret = -1;
+ const size_t req_size_aligned = ((sizeof(uv_write_t) / 16) + 1) * 16;
+ char *common_buf = malloc(req_size_aligned + len);
+ uv_write_t *req = (uv_write_t *) common_buf;
+ char *data = common_buf + req_size_aligned;
+ const uv_buf_t uv_buf[1] = {
+ { data, len }
+ };
+ memcpy(data, buf, len);
+ req->data = data;
+ int res = uv_write(req, (uv_stream_t *)&proxy->client, uv_buf, 1, write_to_client_cb);
+ if (res == 0) {
+ ret = len;
+ } else {
+ free(common_buf);
+ errno = EIO;
+ }
+ return ret;
+}
+
+static int write_to_client_pending(struct tls_proxy_ctx *proxy)
+{
+ if (proxy->client_pending.len == 0) {
+ return 0;
+ }
+
+ struct buf *buf = get_first_client_pending(proxy);
+ uv_buf_t wrbuf = uv_buf_init(buf->buf, buf->size);
+ fprintf(stdout, "writing %zd bytes to client\n", buf->size);
+
+ gnutls_session_t tls_session = proxy->tls.session;
+ assert(proxy->tls.handshake_state != TLS_HS_IN_PROGRESS);
+ assert(gnutls_record_check_corked(tls_session) == 0);
+
+ char *data = buf->buf;
+ size_t len = buf->size;
+
+ ssize_t count = 0;
+ ssize_t submitted = len;
+ ssize_t retries = 0;
+ do {
+ count = gnutls_record_send(tls_session, data, len);
+ if (count < 0) {
+ if (gnutls_error_is_fatal(count)) {
+ fprintf(stderr, "gnutls_record_send failed: %s (%zd)\n",
+ gnutls_strerror_name(count), count);
+ return -1;
+ }
+ if (++retries > TLS_MAX_SEND_RETRIES) {
+ fprintf(stderr, "gnutls_record_send: too many sequential non-fatal errors (%zd), last error is: %s (%zd)\n",
+ retries, gnutls_strerror_name(count), count);
+ return -1;
+ }
+ } else if (count != 0) {
+ data += count;
+ len -= count;
+ retries = 0;
+ } else {
+ if (++retries < TLS_MAX_SEND_RETRIES) {
+ continue;
+ }
+ fprintf(stderr, "gnutls_record_send: too many retries (%zd)\n",
+ retries);
+ fprintf(stderr, "tls_push_to_client didn't send all data(%zd of %zd)\n",
+ len, submitted);
+ return -1;
+ }
+ } while (len > 0);
+
+ remove_first_client_pending(proxy);
+ release_io_buffer(proxy, buf);
+
+ fprintf(stdout, "submitted %zd bytes to client\n", submitted);
+ assert (gnutls_safe_renegotiation_status(tls_session) != 0);
+ assert (gnutls_rehandshake(tls_session) == GNUTLS_E_SUCCESS);
+ /* Prevent write-to-client callback from sending next pending chunk.
+ * At the same time tls_process_from_client() must not call gnutls_handshake()
+ * as there can be application data in this direction. */
+ proxy->tls.handshake_state = TLS_HS_EXPECTED;
+ fprintf(stdout, "rehandshake started\n");
+ return submitted;
+}
+
+static int tls_process_from_upstream(struct tls_proxy_ctx *proxy, const uint8_t *buf, ssize_t len)
+{
+ gnutls_session_t tls_session = proxy->tls.session;
+
+ fprintf(stdout, "pushing %zd bytes to client\n", len);
+
+ assert(gnutls_record_check_corked(tls_session) == 0);
+ ssize_t submitted = 0;
+ if (proxy->client_state != STATE_CONNECTED) {
+ return submitted;
+ }
+
+ bool list_was_empty = (proxy->client_pending.len == 0);
+ push_to_client_pending(proxy, buf, len);
+ submitted = len;
+ if (proxy->tls.handshake_state == TLS_HS_DONE) {
+ if (list_was_empty && proxy->client_pending.len > 0) {
+ int ret = write_to_client_pending(proxy);
+ if (ret < 0) {
+ submitted = -1;
+ }
+ }
+ }
+
+ return submitted;
+}
+
+int tls_process_handshake(struct tls_proxy_ctx *proxy)
+{
+ struct tls_ctx *tls = &proxy->tls;
+ int ret = 1;
+ while (tls->handshake_state == TLS_HS_IN_PROGRESS) {
+ fprintf(stdout, "TLS handshake in progress...\n");
+ int err = gnutls_handshake(tls->session);
+ if (err == GNUTLS_E_SUCCESS) {
+ tls->handshake_state = TLS_HS_DONE;
+ fprintf(stdout, "TLS handshake has completed\n");
+ ret = 1;
+ if (proxy->client_pending.len != 0) {
+ write_to_client_pending(proxy);
+ }
+ } else if (gnutls_error_is_fatal(err)) {
+ fprintf(stderr, "gnutls_handshake failed: %s (%d)\n",
+ gnutls_strerror_name(err), err);
+ ret = -1;
+ break;
+ } else {
+ fprintf(stderr, "gnutls_handshake nonfatal error: %s (%d)\n",
+ gnutls_strerror_name(err), err);
+ ret = 0;
+ break;
+ }
+ }
+ return ret;
+}
+
+int tls_process_from_client(struct tls_proxy_ctx *proxy, const uint8_t *buf, ssize_t nread)
+{
+ struct tls_ctx *tls = &proxy->tls;
+
+ tls->buf = buf;
+ tls->nread = nread >= 0 ? nread : 0;
+ tls->consumed = 0;
+
+ fprintf(stdout, "tls_process: reading %zd bytes from client\n", nread);
+
+ int ret = tls_process_handshake(proxy);
+ if (ret <= 0) {
+ return ret;
+ }
+
+ int submitted = 0;
+ while (true) {
+ ssize_t count = 0;
+ count = gnutls_record_recv(tls->session, tls->recv_buf, sizeof(tls->recv_buf));
+ if (count == GNUTLS_E_AGAIN) {
+ break; /* No data available */
+ } else if (count == GNUTLS_E_INTERRUPTED) {
+ continue; /* Try reading again */
+ } else if (count == GNUTLS_E_REHANDSHAKE) {
+ tls->handshake_state = TLS_HS_IN_PROGRESS;
+ ret = tls_process_handshake(proxy);
+ if (ret <= 0) {
+ return ret;
+ }
+ continue;
+ } else if (count < 0) {
+ fprintf(stderr, "gnutls_record_recv failed: %s (%zd)\n",
+ gnutls_strerror_name(count), count);
+ return -1;
+ } else if (count == 0) {
+ break;
+ }
+ if (proxy->upstream_state == STATE_CONNECTED) {
+ bool upstream_pending_is_empty = (proxy->upstream_pending.len == 0);
+ push_to_upstream_pending(proxy, tls->recv_buf, count);
+ if (upstream_pending_is_empty) {
+ write_to_upstream_pending(proxy);
+ }
+ } else if (proxy->upstream_state == STATE_NOT_CONNECTED) {
+ /* TODO avoid allocation */
+ uv_tcp_init(proxy->loop, &proxy->upstream);
+ uv_connect_t *conn = (uv_connect_t *) malloc(sizeof(uv_connect_t));
+ proxy->upstream_state = STATE_CONNECT_IN_PROGRESS;
+ fprintf(stdout, "connecting to %s\n",
+ ip_straddr((struct sockaddr *)&proxy->upstream_addr));
+ uv_tcp_connect(conn, &proxy->upstream, (struct sockaddr *)&proxy->upstream_addr,
+ on_connect_to_upstream);
+ push_to_upstream_pending(proxy, tls->recv_buf, count);
+ } else if (proxy->upstream_state == STATE_CONNECT_IN_PROGRESS) {
+ push_to_upstream_pending(proxy, tls->recv_buf, count);
+ }
+ submitted += count;
+ }
+ return submitted;
+}
+
+struct tls_proxy_ctx *tls_proxy_allocate()
+{
+ return malloc(sizeof(struct tls_proxy_ctx));
+}
+
+int tls_proxy_init(struct tls_proxy_ctx *proxy,
+ const char *server_addr, int server_port,
+ const char *upstream_addr, int upstream_port,
+ const char *cert_file, const char *key_file)
+{
+ proxy->loop = uv_default_loop();
+ uv_tcp_init(proxy->loop, &proxy->server);
+ int res = uv_ip4_addr(server_addr, server_port, (struct sockaddr_in *)&proxy->server_addr);
+ if (res != 0) {
+ fprintf(stderr, "uv_ip4_addr failed with string '%s'\n", server_addr);
+ return -1;
+ }
+ res = uv_ip4_addr(upstream_addr, upstream_port, (struct sockaddr_in *)&proxy->upstream_addr);
+ if (res != 0) {
+ fprintf(stderr, "uv_ip4_addr failed with string '%s'\n", upstream_addr);
+ return -1;
+ }
+ array_init(proxy->buffer_pool);
+ array_init(proxy->upstream_pending);
+ array_init(proxy->client_pending);
+ proxy->server_state = STATE_NOT_CONNECTED;
+ proxy->client_state = STATE_NOT_CONNECTED;
+ proxy->upstream_state = STATE_NOT_CONNECTED;
+
+ proxy->loop->data = proxy;
+
+ int err = 0;
+ if (gnutls_references == 0) {
+ err = gnutls_global_init();
+ if (err != GNUTLS_E_SUCCESS) {
+ fprintf(stderr, "gnutls_global_init() failed: (%d) %s\n",
+ err, gnutls_strerror_name(err));
+ return -1;
+ }
+ }
+ gnutls_references += 1;
+
+ err = gnutls_certificate_allocate_credentials(&proxy->tls.credentials);
+ if (err != GNUTLS_E_SUCCESS) {
+ fprintf(stderr, "gnutls_certificate_allocate_credentials() failed: (%d) %s\n",
+ err, gnutls_strerror_name(err));
+ return -1;
+ }
+
+ err = gnutls_certificate_set_x509_system_trust(proxy->tls.credentials);
+ if (err <= 0) {
+ fprintf(stderr, "gnutls_certificate_set_x509_system_trust() failed: (%d) %s\n",
+ err, gnutls_strerror_name(err));
+ return -1;
+ }
+
+ if (cert_file && key_file) {
+ err = gnutls_certificate_set_x509_key_file(proxy->tls.credentials,
+ cert_file, key_file, GNUTLS_X509_FMT_PEM);
+ if (err != GNUTLS_E_SUCCESS) {
+ fprintf(stderr, "gnutls_certificate_set_x509_key_file() failed: (%d) %s\n",
+ err, gnutls_strerror_name(err));
+ return -1;
+ }
+ }
+
+ err = gnutls_priority_init(&proxy->tls.priority_cache, NULL, NULL);
+ if (err != GNUTLS_E_SUCCESS) {
+ fprintf(stderr, "gnutls_priority_init() failed: (%d) %s\n",
+ err, gnutls_strerror_name(err));
+ return -1;
+ }
+
+
+ proxy->tls.handshake_state = TLS_HS_NOT_STARTED;
+ return 0;
+}
+
+void tls_proxy_free(struct tls_proxy_ctx *proxy)
+{
+ if (!proxy) {
+ return;
+ }
+ clear_upstream_pending(proxy);
+ clear_client_pending(proxy);
+ clear_buffer_pool(proxy);
+ gnutls_certificate_free_credentials(proxy->tls.credentials);
+ gnutls_priority_deinit(proxy->tls.priority_cache);
+ /* TODO correctly close all the uv_tcp_t */
+ free(proxy);
+
+ gnutls_references -= 1;
+ if (gnutls_references == 0) {
+ gnutls_global_deinit();
+ }
+}
+
+int tls_proxy_start_listen(struct tls_proxy_ctx *proxy)
+{
+ uv_tcp_bind(&proxy->server, (const struct sockaddr*)&proxy->server_addr, 0);
+ int ret = uv_listen((uv_stream_t*)&proxy->server, 128, on_client_connection);
+ if (ret == 0) {
+ proxy->server_state = STATE_LISTENING;
+ }
+ return ret;
+}
+
+int tls_proxy_run(struct tls_proxy_ctx *proxy)
+{
+ return uv_run(proxy->loop, UV_RUN_DEFAULT);
+}
diff --git a/tests/pytests/rehandshake/tls-proxy.h b/tests/pytests/rehandshake/tls-proxy.h
new file mode 100644
index 0000000..1204eda
--- /dev/null
+++ b/tests/pytests/rehandshake/tls-proxy.h
@@ -0,0 +1,14 @@
+#pragma once
+
+struct tls_proxy_ctx;
+
+struct tls_proxy_ctx *tls_proxy_allocate();
+void tls_proxy_free(struct tls_proxy_ctx *proxy);
+int tls_proxy_init(struct tls_proxy_ctx *proxy,
+ const char *server_addr, int server_port,
+ const char *upstream_addr, int upstream_port,
+ const char *cert_file, const char *key_file);
+int tls_proxy_start_listen(struct tls_proxy_ctx *proxy);
+int tls_proxy_run(struct tls_proxy_ctx *proxy);
+
+
diff --git a/tests/pytests/rehandshake/tlsproxy.c b/tests/pytests/rehandshake/tlsproxy.c
new file mode 100644
index 0000000..0c074f1
--- /dev/null
+++ b/tests/pytests/rehandshake/tlsproxy.c
@@ -0,0 +1,31 @@
+#include <stdio.h>
+#include "tls-proxy.h"
+#include <gnutls/gnutls.h>
+
+int main()
+{
+ struct tls_proxy_ctx *proxy = tls_proxy_allocate();
+ if (!proxy) {
+ fprintf(stderr, "can't allocate tls_proxy structure\n");
+ return 1;
+ }
+ int res = tls_proxy_init(proxy,
+ "127.0.0.1", 53921, /* Address to listen */
+ "127.0.0.1", 53910, /* Upstream address */
+ "../certs/tt.cert.pem",
+ "../certs/tt.key.pem");
+ if (res) {
+ fprintf(stderr, "can't initialize tls_proxy structure\n");
+ return res;
+ }
+ res = tls_proxy_start_listen(proxy);
+ if (res) {
+ fprintf(stderr, "error starting listen, error code: %i\n", res);
+ return res;
+ }
+ fprintf(stdout, "started...\n");
+ res = tls_proxy_run(proxy);
+ tls_proxy_free(proxy);
+ return res;
+}
+
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-28 23:41:07 +0000