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tls13: early_data: support to parse max_early_data_size ext

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Signed-off-by: Yanray Wang <yanray.wang@arm.com>
This commit is contained in:
Yanray Wang 2023-11-14 17:20:16 +08:00
parent d4dc354185
commit 920db45818
1 changed files with 42 additions and 9 deletions
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51
library/ssl_tls13_client.c
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@ -2647,6 +2647,43 @@ static int ssl_tls13_handshake_wrapup(mbedtls_ssl_context *ssl)
#if defined(MBEDTLS_SSL_SESSION_TICKETS)
#if defined(MBEDTLS_SSL_EARLY_DATA)
/* From RFC 8446 section 4.2.10
*
* struct {
* select (Handshake.msg_type) {
* case new_session_ticket: uint32 max_early_data_size;
* ...
* };
* } EarlyDataIndication;
*/
MBEDTLS_CHECK_RETURN_CRITICAL
static int ssl_tls13_parse_nst_early_data_ext(mbedtls_ssl_context *ssl,
const unsigned char *buf,
const unsigned char *end)
{
MBEDTLS_SSL_CHK_BUF_READ_PTR(buf, end, 4);
if ((end - buf) != 4) {
MBEDTLS_SSL_PEND_FATAL_ALERT(
MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR,
MBEDTLS_ERR_SSL_DECODE_ERROR);
return MBEDTLS_ERR_SSL_DECODE_ERROR;
}
if (ssl->session != NULL) {
ssl->session->max_early_data_size = MBEDTLS_GET_UINT32_BE(buf, 0);
mbedtls_ssl_session_set_ticket_flags(
ssl->session, MBEDTLS_SSL_TLS1_3_TICKET_ALLOW_EARLY_DATA);
MBEDTLS_SSL_DEBUG_MSG(
3, ("received max_early_data_size: %u",
(unsigned int) ssl->session->max_early_data_size));
return 0;
}
return MBEDTLS_ERR_SSL_BAD_INPUT_DATA;
}
#endif /* MBEDTLS_SSL_EARLY_DATA */
MBEDTLS_CHECK_RETURN_CRITICAL
static int ssl_tls13_parse_new_session_ticket_exts(mbedtls_ssl_context *ssl,
const unsigned char *buf,
@ -2680,15 +2717,11 @@ static int ssl_tls13_parse_new_session_ticket_exts(mbedtls_ssl_context *ssl,
switch (extension_type) {
#if defined(MBEDTLS_SSL_EARLY_DATA)
case MBEDTLS_TLS_EXT_EARLY_DATA:
if (extension_data_len != 4) {
MBEDTLS_SSL_PEND_FATAL_ALERT(
MBEDTLS_SSL_ALERT_MSG_DECODE_ERROR,
MBEDTLS_ERR_SSL_DECODE_ERROR);
return MBEDTLS_ERR_SSL_DECODE_ERROR;
}
if (ssl->session != NULL) {
ssl->session->ticket_flags |=
MBEDTLS_SSL_TLS1_3_TICKET_ALLOW_EARLY_DATA;
ret = ssl_tls13_parse_nst_early_data_ext(
ssl, p, p + extension_data_len);
if (ret != 0) {
MBEDTLS_SSL_DEBUG_RET(
1, "ssl_tls13_parse_max_early_data_size_ext", ret);
}
break;
#endif /* MBEDTLS_SSL_EARLY_DATA */