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tls13: Rework mbedtls_ssl_tls13_fetch_handshake_msg()

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Signed-off-by: Ronald Cron <ronald.cron@arm.com>
This commit is contained in:
Ronald Cron 2026-06-15 14:09:17 +02:00
parent 0c9d3d4a0f
commit 6c557a70f6
1 changed files with 19 additions and 11 deletions
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30
library/ssl_tls13_generic.c
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@ -53,19 +53,23 @@ int mbedtls_ssl_tls13_fetch_handshake_msg(mbedtls_ssl_context *ssl,
{
int ret;
if ((ret = mbedtls_ssl_read_record(ssl, 0)) != 0) {
ret = mbedtls_ssl_read_record(ssl, 0);
if (ret != 0) {
MBEDTLS_SSL_DEBUG_RET(1, "mbedtls_ssl_read_record", ret);
goto cleanup;
goto error;
}
if (ssl->in_msgtype != MBEDTLS_SSL_MSG_HANDSHAKE ||
ssl->in_msg[0] != hs_type ||
(require_record_boundary && (ssl->in_hslen != ssl->in_msglen))) {
MBEDTLS_SSL_DEBUG_MSG(1, ("Receive unexpected handshake message."));
MBEDTLS_SSL_PEND_FATAL_ALERT(MBEDTLS_SSL_ALERT_MSG_UNEXPECTED_MESSAGE,
MBEDTLS_ERR_SSL_UNEXPECTED_MESSAGE);
ret = MBEDTLS_ERR_SSL_UNEXPECTED_MESSAGE;
goto cleanup;
if (ssl->in_msgtype != MBEDTLS_SSL_MSG_HANDSHAKE ||
ssl->in_msg[0] != hs_type) {
MBEDTLS_SSL_DEBUG_MSG(1, ("Receive unexpected handshake message."));
goto error;
}
if (require_record_boundary && (ssl->in_hslen != ssl->in_msglen)) {
MBEDTLS_SSL_DEBUG_MSG(1, ("Handshake message %s end not aligned with a record boundary",
mbedtls_ssl_get_hs_msg_name(hs_type)));
goto error;
}
/*
@ -77,9 +81,13 @@ int mbedtls_ssl_tls13_fetch_handshake_msg(mbedtls_ssl_context *ssl,
*/
*buf = ssl->in_msg + 4;
*buf_len = ssl->in_hslen - 4;
return 0;
cleanup:
error:
if (ret == MBEDTLS_ERR_SSL_UNEXPECTED_MESSAGE) {
MBEDTLS_SSL_PEND_FATAL_ALERT(MBEDTLS_SSL_ALERT_MSG_UNEXPECTED_MESSAGE,
MBEDTLS_ERR_SSL_UNEXPECTED_MESSAGE);
}
return ret;
}