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7a67f057d7
The underlying socket can handling polling, and any other transparent ioctl requests. Note that CPython handles the case of polling an ssl object by polling the file descriptor of the underlying socket file, and that behaviour is emulated here.
263 lines
8.6 KiB
C
263 lines
8.6 KiB
C
/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2015-2017 Paul Sokolovsky
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <stdio.h>
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#include <string.h>
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#include "py/runtime.h"
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#include "py/stream.h"
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#if MICROPY_PY_USSL && MICROPY_SSL_AXTLS
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#include "ssl.h"
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typedef struct _mp_obj_ssl_socket_t {
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mp_obj_base_t base;
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mp_obj_t sock;
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SSL_CTX *ssl_ctx;
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SSL *ssl_sock;
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byte *buf;
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uint32_t bytes_left;
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} mp_obj_ssl_socket_t;
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struct ssl_args {
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mp_arg_val_t key;
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mp_arg_val_t cert;
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mp_arg_val_t server_side;
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mp_arg_val_t server_hostname;
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};
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STATIC const mp_obj_type_t ussl_socket_type;
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STATIC mp_obj_ssl_socket_t *socket_new(mp_obj_t sock, struct ssl_args *args) {
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#if MICROPY_PY_USSL_FINALISER
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mp_obj_ssl_socket_t *o = m_new_obj_with_finaliser(mp_obj_ssl_socket_t);
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#else
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mp_obj_ssl_socket_t *o = m_new_obj(mp_obj_ssl_socket_t);
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#endif
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o->base.type = &ussl_socket_type;
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o->buf = NULL;
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o->bytes_left = 0;
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o->sock = sock;
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uint32_t options = SSL_SERVER_VERIFY_LATER;
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if (args->key.u_obj != mp_const_none) {
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options |= SSL_NO_DEFAULT_KEY;
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}
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if ((o->ssl_ctx = ssl_ctx_new(options, SSL_DEFAULT_CLNT_SESS)) == NULL) {
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mp_raise_OSError(MP_EINVAL);
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}
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if (args->key.u_obj != mp_const_none) {
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size_t len;
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const byte *data = (const byte*)mp_obj_str_get_data(args->key.u_obj, &len);
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int res = ssl_obj_memory_load(o->ssl_ctx, SSL_OBJ_RSA_KEY, data, len, NULL);
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if (res != SSL_OK) {
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mp_raise_ValueError("invalid key");
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}
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data = (const byte*)mp_obj_str_get_data(args->cert.u_obj, &len);
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res = ssl_obj_memory_load(o->ssl_ctx, SSL_OBJ_X509_CERT, data, len, NULL);
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if (res != SSL_OK) {
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mp_raise_ValueError("invalid cert");
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}
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}
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if (args->server_side.u_bool) {
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o->ssl_sock = ssl_server_new(o->ssl_ctx, (long)sock);
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} else {
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SSL_EXTENSIONS *ext = ssl_ext_new();
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if (args->server_hostname.u_obj != mp_const_none) {
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ext->host_name = (char*)mp_obj_str_get_str(args->server_hostname.u_obj);
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}
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o->ssl_sock = ssl_client_new(o->ssl_ctx, (long)sock, NULL, 0, ext);
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int res = ssl_handshake_status(o->ssl_sock);
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// Pointer to SSL_EXTENSIONS as being passed to ssl_client_new()
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// is saved in ssl_sock->extensions.
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// As of axTLS 2.1.3, extensions aren't used beyond the initial
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// handshake, and that's pretty much how it's expected to be. So
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// we allocate them on stack and reset the pointer after handshake.
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if (res != SSL_OK) {
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printf("ssl_handshake_status: %d\n", res);
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ssl_display_error(res);
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mp_raise_OSError(MP_EIO);
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}
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}
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return o;
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}
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STATIC void socket_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) {
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(void)kind;
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mp_obj_ssl_socket_t *self = MP_OBJ_TO_PTR(self_in);
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mp_printf(print, "<_SSLSocket %p>", self->ssl_sock);
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}
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STATIC mp_uint_t socket_read(mp_obj_t o_in, void *buf, mp_uint_t size, int *errcode) {
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mp_obj_ssl_socket_t *o = MP_OBJ_TO_PTR(o_in);
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if (o->ssl_sock == NULL) {
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*errcode = EBADF;
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return MP_STREAM_ERROR;
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}
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while (o->bytes_left == 0) {
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mp_int_t r = ssl_read(o->ssl_sock, &o->buf);
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if (r == SSL_OK) {
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// SSL_OK from ssl_read() means "everything is ok, but there's
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// no user data yet". So, we just keep reading.
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continue;
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}
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if (r < 0) {
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if (r == SSL_CLOSE_NOTIFY || r == SSL_ERROR_CONN_LOST) {
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// EOF
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return 0;
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}
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if (r == SSL_EAGAIN) {
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r = MP_EAGAIN;
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}
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*errcode = r;
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return MP_STREAM_ERROR;
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}
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o->bytes_left = r;
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}
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if (size > o->bytes_left) {
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size = o->bytes_left;
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}
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memcpy(buf, o->buf, size);
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o->buf += size;
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o->bytes_left -= size;
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return size;
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}
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STATIC mp_uint_t socket_write(mp_obj_t o_in, const void *buf, mp_uint_t size, int *errcode) {
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mp_obj_ssl_socket_t *o = MP_OBJ_TO_PTR(o_in);
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if (o->ssl_sock == NULL) {
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*errcode = EBADF;
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return MP_STREAM_ERROR;
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}
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mp_int_t r = ssl_write(o->ssl_sock, buf, size);
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if (r < 0) {
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*errcode = r;
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return MP_STREAM_ERROR;
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}
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return r;
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}
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STATIC mp_uint_t socket_ioctl(mp_obj_t o_in, mp_uint_t request, uintptr_t arg, int *errcode) {
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mp_obj_ssl_socket_t *self = MP_OBJ_TO_PTR(o_in);
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if (request == MP_STREAM_CLOSE && self->ssl_sock != NULL) {
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ssl_free(self->ssl_sock);
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ssl_ctx_free(self->ssl_ctx);
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self->ssl_sock = NULL;
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}
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// Pass all requests down to the underlying socket
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return mp_get_stream(self->sock)->ioctl(self->sock, request, arg, errcode);
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}
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STATIC mp_obj_t socket_setblocking(mp_obj_t self_in, mp_obj_t flag_in) {
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// Currently supports only blocking mode
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(void)self_in;
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if (!mp_obj_is_true(flag_in)) {
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mp_raise_NotImplementedError(NULL);
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}
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return mp_const_none;
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_2(socket_setblocking_obj, socket_setblocking);
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STATIC const mp_rom_map_elem_t ussl_socket_locals_dict_table[] = {
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{ MP_ROM_QSTR(MP_QSTR_read), MP_ROM_PTR(&mp_stream_read_obj) },
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{ MP_ROM_QSTR(MP_QSTR_readinto), MP_ROM_PTR(&mp_stream_readinto_obj) },
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{ MP_ROM_QSTR(MP_QSTR_readline), MP_ROM_PTR(&mp_stream_unbuffered_readline_obj) },
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{ MP_ROM_QSTR(MP_QSTR_write), MP_ROM_PTR(&mp_stream_write_obj) },
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{ MP_ROM_QSTR(MP_QSTR_setblocking), MP_ROM_PTR(&socket_setblocking_obj) },
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{ MP_ROM_QSTR(MP_QSTR_close), MP_ROM_PTR(&mp_stream_close_obj) },
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#if MICROPY_PY_USSL_FINALISER
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{ MP_ROM_QSTR(MP_QSTR___del__), MP_ROM_PTR(&mp_stream_close_obj) },
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#endif
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};
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STATIC MP_DEFINE_CONST_DICT(ussl_socket_locals_dict, ussl_socket_locals_dict_table);
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STATIC const mp_stream_p_t ussl_socket_stream_p = {
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.read = socket_read,
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.write = socket_write,
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.ioctl = socket_ioctl,
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};
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STATIC const mp_obj_type_t ussl_socket_type = {
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{ &mp_type_type },
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// Save on qstr's, reuse same as for module
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.name = MP_QSTR_ussl,
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.print = socket_print,
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.getiter = NULL,
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.iternext = NULL,
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.protocol = &ussl_socket_stream_p,
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.locals_dict = (void*)&ussl_socket_locals_dict,
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};
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STATIC mp_obj_t mod_ssl_wrap_socket(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
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// TODO: Implement more args
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static const mp_arg_t allowed_args[] = {
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{ MP_QSTR_key, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = mp_const_none} },
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{ MP_QSTR_cert, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = mp_const_none} },
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{ MP_QSTR_server_side, MP_ARG_KW_ONLY | MP_ARG_BOOL, {.u_bool = false} },
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{ MP_QSTR_server_hostname, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = mp_const_none} },
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};
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// TODO: Check that sock implements stream protocol
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mp_obj_t sock = pos_args[0];
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struct ssl_args args;
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mp_arg_parse_all(n_args - 1, pos_args + 1, kw_args,
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MP_ARRAY_SIZE(allowed_args), allowed_args, (mp_arg_val_t*)&args);
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return MP_OBJ_FROM_PTR(socket_new(sock, &args));
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_KW(mod_ssl_wrap_socket_obj, 1, mod_ssl_wrap_socket);
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STATIC const mp_rom_map_elem_t mp_module_ssl_globals_table[] = {
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{ MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_ussl) },
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{ MP_ROM_QSTR(MP_QSTR_wrap_socket), MP_ROM_PTR(&mod_ssl_wrap_socket_obj) },
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};
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STATIC MP_DEFINE_CONST_DICT(mp_module_ssl_globals, mp_module_ssl_globals_table);
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const mp_obj_module_t mp_module_ussl = {
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.base = { &mp_type_module },
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.globals = (mp_obj_dict_t*)&mp_module_ssl_globals,
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};
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#endif // MICROPY_PY_USSL
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