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Introduce helper function to send pending fatal alerts

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This commit is contained in:
Hanno Becker 2019-07-26 07:24:05 +01:00
parent 50d53212ef
commit b82350b25f
2 changed files with 16 additions and 10 deletions
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7
include/mbedtls/ssl_internal.h
View File

@ -1733,11 +1733,12 @@ static inline unsigned int mbedtls_ssl_conf_get_ems_enforced(
/* This internal function can be used to pend a fatal alert for
* later delivery.
*
* The check for pending alerts must be done manually. Currently,
* it happens only during the handshake loop.
* The check for pending alerts must be done by calling
* the (static internal) function ssl_send_pending_fatal_alert().
* Currently, it happens only during the handshake loop.
*
* This function must not be called multiple times without
* manually inspecting and clearing ssl->pending_fatal_alert_msg in between.
* sending the pending fatal alerts in between.
*/
MBEDTLS_ALWAYS_INLINE static inline void mbedtls_ssl_pend_fatal_alert(
mbedtls_ssl_context *ssl,

19
library/ssl_tls.c
View File

@ -75,6 +75,17 @@ static inline size_t ssl_ep_len( const mbedtls_ssl_context *ssl )
#endif
}
static void ssl_send_pending_fatal_alert( mbedtls_ssl_context *ssl )
{
if( ssl->pending_fatal_alert_msg == MBEDTLS_SSL_ALERT_MSG_NONE )
return;
mbedtls_ssl_send_alert_message( ssl,
MBEDTLS_SSL_ALERT_LEVEL_FATAL,
ssl->pending_fatal_alert_msg );
ssl->pending_fatal_alert_msg = MBEDTLS_SSL_ALERT_MSG_NONE;
}
/*
* Start a timer.
* Passing millisecs = 0 cancels a running timer.
@ -9828,13 +9839,7 @@ int mbedtls_ssl_handshake_step( mbedtls_ssl_context *ssl )
ret = mbedtls_ssl_handshake_server_step( ssl );
#endif
if( ssl->pending_fatal_alert_msg != MBEDTLS_SSL_ALERT_MSG_NONE )
{
mbedtls_ssl_send_alert_message( ssl,
MBEDTLS_SSL_ALERT_LEVEL_FATAL,
ssl->pending_fatal_alert_msg );
ssl->pending_fatal_alert_msg = MBEDTLS_SSL_ALERT_MSG_NONE;
}
ssl_send_pending_fatal_alert( ssl );
return( ret );
}