yuzu/externals/libressl/ssl/tls_content.c

150 lines
3.1 KiB
C
Raw Normal View History

2022-04-25 00:29:35 +04:00
/* $OpenBSD: tls_content.c,v 1.1 2021/09/04 16:26:12 jsing Exp $ */
/*
* Copyright (c) 2020 Joel Sing <jsing@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <stdlib.h>
#include <string.h>
#include "tls_content.h"
/* Content from a TLS record. */
struct tls_content {
uint8_t type;
uint16_t epoch;
const uint8_t *data;
size_t len;
CBS cbs;
};
struct tls_content *
tls_content_new(void)
{
return calloc(1, sizeof(struct tls_content));
}
void
tls_content_clear(struct tls_content *content)
{
freezero((void *)content->data, content->len);
memset(content, 0, sizeof(*content));
}
void
tls_content_free(struct tls_content *content)
{
if (content == NULL)
return;
tls_content_clear(content);
freezero(content, sizeof(struct tls_content));
}
CBS *
tls_content_cbs(struct tls_content *content)
{
return &content->cbs;
}
int
tls_content_equal(struct tls_content *content, const uint8_t *buf, size_t n)
{
return CBS_mem_equal(&content->cbs, buf, n);
}
size_t
tls_content_remaining(struct tls_content *content)
{
return CBS_len(&content->cbs);
}
uint8_t
tls_content_type(struct tls_content *content)
{
return content->type;
}
int
tls_content_dup_data(struct tls_content *content, uint8_t type,
const uint8_t *data, size_t data_len)
{
uint8_t *dup;
if ((dup = calloc(1, data_len)) == NULL)
return 0;
memcpy(dup, data, data_len);
tls_content_set_data(content, type, dup, data_len);
return 1;
}
uint16_t
tls_content_epoch(struct tls_content *content)
{
return content->epoch;
}
void
tls_content_set_epoch(struct tls_content *content, uint16_t epoch)
{
content->epoch = epoch;
}
void
tls_content_set_data(struct tls_content *content, uint8_t type,
const uint8_t *data, size_t data_len)
{
tls_content_clear(content);
content->type = type;
content->data = data;
content->len = data_len;
CBS_init(&content->cbs, content->data, content->len);
}
static ssize_t
tls_content_read_internal(struct tls_content *content, uint8_t *buf, size_t n,
int peek)
{
if (n > CBS_len(&content->cbs))
n = CBS_len(&content->cbs);
/* XXX - CBS_memcpy? CBS_copy_bytes? */
memcpy(buf, CBS_data(&content->cbs), n);
if (!peek) {
if (!CBS_skip(&content->cbs, n))
return -1;
}
return n;
}
ssize_t
tls_content_peek(struct tls_content *content, uint8_t *buf, size_t n)
{
return tls_content_read_internal(content, buf, n, 1);
}
ssize_t
tls_content_read(struct tls_content *content, uint8_t *buf, size_t n)
{
return tls_content_read_internal(content, buf, n, 0);
}