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TLS 1.3: Do not send handshake data in handshake step handlers

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Send data (call to mbedtls_ssl_flush_output()) only from
the loop over the handshake steps. That way, we do not
have to take care of the partial writings (MBEDTLS_ERR_SSL_WANT_WRITE
error code) on the network in handshake step handlers.

Signed-off-by: Ronald Cron <ronald.cron@arm.com>
This commit is contained in:
Ronald Cron
2022-02-02 15:33:46 +01:00
parent 9df7c80c78
commit 66dbf9118e
4 changed files with 23 additions and 9 deletions
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5
library/ssl_misc.h
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@ -1231,10 +1231,11 @@ int mbedtls_ssl_read_record( mbedtls_ssl_context *ssl,
int mbedtls_ssl_fetch_input( mbedtls_ssl_context *ssl, size_t nb_want );
int mbedtls_ssl_write_handshake_msg_ext( mbedtls_ssl_context *ssl,
int update_checksum );
int update_checksum,
uint8_t force_flush );
static inline int mbedtls_ssl_write_handshake_msg( mbedtls_ssl_context *ssl )
{
return( mbedtls_ssl_write_handshake_msg_ext( ssl, 1 /* update checksum */ ) );
return( mbedtls_ssl_write_handshake_msg_ext( ssl, 1 /* update checksum */, 1 /* force flush */ ) );
}
int mbedtls_ssl_write_record( mbedtls_ssl_context *ssl, uint8_t force_flush );