diff options
Diffstat (limited to 'extmod/modussl_axtls.c')
| -rw-r--r-- | extmod/modussl_axtls.c | 225 |
1 files changed, 225 insertions, 0 deletions
diff --git a/extmod/modussl_axtls.c b/extmod/modussl_axtls.c new file mode 100644 index 0000000000..4a3e297e1e --- /dev/null +++ b/extmod/modussl_axtls.c @@ -0,0 +1,225 @@ +/* + * This file is part of the Micro Python project, http://micropython.org/ + * + * The MIT License (MIT) + * + * Copyright (c) 2015 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 <errno.h> + +#include "py/nlr.h" +#include "py/runtime.h" +#include "py/stream.h" + +#if MICROPY_PY_USSL + +#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; + +STATIC const mp_obj_type_t ussl_socket_type; + +STATIC mp_obj_ssl_socket_t *socket_new(mp_obj_t sock, bool server_side) { + mp_obj_ssl_socket_t *o = m_new_obj(mp_obj_ssl_socket_t); + o->base.type = &ussl_socket_type; + o->buf = NULL; + o->bytes_left = 0; + o->sock = sock; + + uint32_t options = SSL_SERVER_VERIFY_LATER; + if ((o->ssl_ctx = ssl_ctx_new(options, SSL_DEFAULT_CLNT_SESS)) == NULL) { + nlr_raise(mp_obj_new_exception_arg1(&mp_type_OSError, MP_OBJ_NEW_SMALL_INT(EINVAL))); + } + + if (server_side) { + o->ssl_sock = ssl_server_new(o->ssl_ctx, (long)sock); + } else { + o->ssl_sock = ssl_client_new(o->ssl_ctx, (long)sock, NULL, 0); + + int res; + /* check the return status */ + if ((res = ssl_handshake_status(o->ssl_sock)) != SSL_OK) { + printf("ssl_handshake_status: %d\n", res); + ssl_display_error(res); + nlr_raise(mp_obj_new_exception_arg1(&mp_type_OSError, MP_OBJ_NEW_SMALL_INT(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); + + 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 + // not 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; + } + *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); + mp_int_t r = ssl_write(o->ssl_sock, buf, size); + if (r < 0) { + *errcode = r; + return MP_STREAM_ERROR; + } + return r; +} + +STATIC mp_obj_t socket_close(mp_obj_t self_in) { + mp_obj_ssl_socket_t *self = MP_OBJ_TO_PTR(self_in); + ssl_free(self->ssl_sock); + ssl_ctx_free(self->ssl_ctx); + + mp_obj_t dest[2]; + mp_load_method(self->sock, MP_QSTR_close, dest); + return mp_call_method_n_kw(0, 0, dest); +} +STATIC MP_DEFINE_CONST_FUN_OBJ_1(socket_close_obj, socket_close); + +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_readall), MP_ROM_PTR(&mp_stream_readall_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_close), MP_ROM_PTR(&socket_close_obj) }, +}; + +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, +}; + +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_server_side, MP_ARG_KW_ONLY | MP_ARG_BOOL, {.u_bool = false} }, + }; + + // TODO: Check that sock implements stream protocol + mp_obj_t sock = pos_args[0]; + + struct { + mp_arg_val_t server_side; + } 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.server_side.u_bool)); +} +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 }, + .name = MP_QSTR_ussl, + .globals = (mp_obj_dict_t*)&mp_module_ssl_globals, +}; + + +// These functions might be split to stream_posix.c. They are referenced by +// axtls os_port.h . +ssize_t mp_stream_posix_write(void *sock_obj, const void *buf, size_t len); +ssize_t mp_stream_posix_read(void *sock_obj, void *buf, size_t len); + +int mp_stream_errno; + +ssize_t mp_stream_posix_write(void *sock_obj, const void *buf, size_t len) { + struct _mp_obj_base_t *o = (struct _mp_obj_base_t *)sock_obj; + const mp_stream_p_t *stream_p = o->type->protocol; + mp_uint_t out_sz = stream_p->write(o, buf, len, &mp_stream_errno); + if (out_sz == MP_STREAM_ERROR) { + return -1; + } else { + return out_sz; + } +} + +ssize_t mp_stream_posix_read(void *sock_obj, void *buf, size_t len) { + struct _mp_obj_base_t *o = (struct _mp_obj_base_t *)sock_obj; + const mp_stream_p_t *stream_p = o->type->protocol; + mp_uint_t out_sz = stream_p->read(o, buf, len, &mp_stream_errno); + if (out_sz == MP_STREAM_ERROR) { + return -1; + } else { + return out_sz; + } +} + +#endif // MICROPY_PY_USSL |