mirror of
https://github.com/pineappleEA/pineapple-src.git
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195 lines
4.4 KiB
C
Executable File
195 lines
4.4 KiB
C
Executable File
/* $OpenBSD: tls13_handshake_msg.c,v 1.2 2019/11/20 16:21:20 beck Exp $ */
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/*
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* Copyright (c) 2018, 2019 Joel Sing <jsing@openbsd.org>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include "bytestring.h"
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#include "ssl_locl.h"
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#include "tls13_internal.h"
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#define TLS13_HANDSHAKE_MSG_HEADER_LEN 4
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#define TLS13_HANDSHAKE_MSG_INITIAL_LEN 256
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#define TLS13_HANDSHAKE_MSG_MAX_LEN (256 * 1024)
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struct tls13_handshake_msg {
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uint8_t msg_type;
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uint32_t msg_len;
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uint8_t *data;
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size_t data_len;
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struct tls13_buffer *buf;
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CBS cbs;
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CBB cbb;
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};
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struct tls13_handshake_msg *
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tls13_handshake_msg_new()
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{
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struct tls13_handshake_msg *msg = NULL;
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if ((msg = calloc(1, sizeof(struct tls13_handshake_msg))) == NULL)
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goto err;
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if ((msg->buf = tls13_buffer_new(0)) == NULL)
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goto err;
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return msg;
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err:
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tls13_handshake_msg_free(msg);
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return NULL;
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}
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void
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tls13_handshake_msg_free(struct tls13_handshake_msg *msg)
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{
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if (msg == NULL)
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return;
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tls13_buffer_free(msg->buf);
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CBB_cleanup(&msg->cbb);
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freezero(msg->data, msg->data_len);
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freezero(msg, sizeof(struct tls13_handshake_msg));
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}
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void
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tls13_handshake_msg_data(struct tls13_handshake_msg *msg, CBS *cbs)
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{
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CBS_init(cbs, msg->data, msg->data_len);
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}
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int
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tls13_handshake_msg_set_buffer(struct tls13_handshake_msg *msg, CBS *cbs)
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{
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return tls13_buffer_set_data(msg->buf, cbs);
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}
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uint8_t
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tls13_handshake_msg_type(struct tls13_handshake_msg *msg)
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{
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return msg->msg_type;
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}
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int
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tls13_handshake_msg_content(struct tls13_handshake_msg *msg, CBS *cbs)
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{
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tls13_handshake_msg_data(msg, cbs);
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return CBS_skip(cbs, TLS13_HANDSHAKE_MSG_HEADER_LEN);
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}
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int
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tls13_handshake_msg_start(struct tls13_handshake_msg *msg, CBB *body,
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uint8_t msg_type)
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{
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if (!CBB_init(&msg->cbb, TLS13_HANDSHAKE_MSG_INITIAL_LEN))
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return 0;
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if (!CBB_add_u8(&msg->cbb, msg_type))
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return 0;
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if (!CBB_add_u24_length_prefixed(&msg->cbb, body))
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return 0;
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return 1;
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}
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int
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tls13_handshake_msg_finish(struct tls13_handshake_msg *msg)
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{
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if (!CBB_finish(&msg->cbb, &msg->data, &msg->data_len))
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return 0;
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CBS_init(&msg->cbs, msg->data, msg->data_len);
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return 1;
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}
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static ssize_t
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tls13_handshake_msg_read_cb(void *buf, size_t n, void *cb_arg)
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{
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struct tls13_record_layer *rl = cb_arg;
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return tls13_read_handshake_data(rl, buf, n);
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}
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int
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tls13_handshake_msg_recv(struct tls13_handshake_msg *msg,
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struct tls13_record_layer *rl)
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{
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uint8_t msg_type;
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uint32_t msg_len;
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CBS cbs;
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int ret;
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if (msg->data != NULL)
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return TLS13_IO_FAILURE;
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if (msg->msg_type == 0) {
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if ((ret = tls13_buffer_extend(msg->buf,
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TLS13_HANDSHAKE_MSG_HEADER_LEN,
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tls13_handshake_msg_read_cb, rl)) <= 0)
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return ret;
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tls13_buffer_cbs(msg->buf, &cbs);
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if (!CBS_get_u8(&cbs, &msg_type))
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return TLS13_IO_FAILURE;
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if (!CBS_get_u24(&cbs, &msg_len))
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return TLS13_IO_FAILURE;
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/* XXX - do we want to make this variable on message type? */
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if (msg_len > TLS13_HANDSHAKE_MSG_MAX_LEN)
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return TLS13_IO_FAILURE;
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msg->msg_type = msg_type;
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msg->msg_len = msg_len;
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}
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if ((ret = tls13_buffer_extend(msg->buf,
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TLS13_HANDSHAKE_MSG_HEADER_LEN + msg->msg_len,
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tls13_handshake_msg_read_cb, rl)) <= 0)
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return ret;
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if (!tls13_buffer_finish(msg->buf, &msg->data, &msg->data_len))
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return TLS13_IO_FAILURE;
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return TLS13_IO_SUCCESS;
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}
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int
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tls13_handshake_msg_send(struct tls13_handshake_msg *msg,
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struct tls13_record_layer *rl)
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{
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ssize_t ret;
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if (msg->data == NULL)
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return TLS13_IO_FAILURE;
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if (CBS_len(&msg->cbs) == 0)
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return TLS13_IO_FAILURE;
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while (CBS_len(&msg->cbs) > 0) {
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if ((ret = tls13_write_handshake_data(rl, CBS_data(&msg->cbs),
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CBS_len(&msg->cbs))) <= 0)
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return ret;
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if (!CBS_skip(&msg->cbs, ret))
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return TLS13_IO_FAILURE;
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}
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return TLS13_IO_SUCCESS;
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}
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