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micropython/extmod/modussl_axtls.c

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