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tls13: srv: Always parse the pre-shared key extension

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Signed-off-by: Ronald Cron <ronald.cron@arm.com>
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Ronald Cron
2024-02-14 15:49:38 +01:00
parent 7a30cf5954
commit 12e72f1664
2 changed files with 7 additions and 6 deletions
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7
library/ssl_tls13_server.c
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@ -1744,10 +1744,11 @@ static int ssl_tls13_parse_client_hello(mbedtls_ssl_context *ssl,
/* Update checksum with either
* - The entire content of the CH message, if no PSK extension is present
* - The content up to but excluding the PSK extension, if present.
* Always parse the pre-shared key extension when present in the
* ClientHello even if some pre-requisites for PSK key exchange modes are
* not met. That way we always validate the syntax of the extension.
*/
/* If we've settled on a PSK-based exchange, parse PSK identity ext */
if (ssl_tls13_key_exchange_is_psk_available(ssl) ||
ssl_tls13_key_exchange_is_psk_ephemeral_available(ssl)) {
if (handshake->received_extensions & MBEDTLS_SSL_EXT_MASK(PRE_SHARED_KEY)) {
ret = handshake->update_checksum(ssl, buf,
pre_shared_key_ext - buf);
if (0 != ret) {