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tls13:server:Add prepare write_server_hello

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Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
This commit is contained in:
Jerry Yu 2022-03-30 17:32:21 +08:00
parent 5b64ae9bad
commit f4b27e4351
1 changed files with 62 additions and 2 deletions
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64
library/ssl_tls13_server.c
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@ -730,10 +730,70 @@ cleanup:
/*
* StateHanler: MBEDTLS_SSL_SERVER_HELLO
*/
static int ssl_tls13_prepare_server_hello( mbedtls_ssl_context *ssl )
{
int ret = 0;
if( ssl->conf->f_rng == NULL )
{
MBEDTLS_SSL_DEBUG_MSG( 1, ( "no RNG provided" ) );
return( MBEDTLS_ERR_SSL_NO_RNG );
}
if( ( ret = ssl->conf->f_rng( ssl->conf->p_rng,
ssl->handshake->randbytes,
MBEDTLS_SERVER_HELLO_RANDOM_LEN ) ) != 0 )
{
MBEDTLS_SSL_DEBUG_RET( 1, "f_rng", ret );
return( ret );
}
MBEDTLS_SSL_DEBUG_BUF( 3, "server hello, random bytes",
ssl->handshake->randbytes,
MBEDTLS_SERVER_HELLO_RANDOM_LEN );
#if defined(MBEDTLS_HAVE_TIME)
ssl->session_negotiate->start = time( NULL );
#endif /* MBEDTLS_HAVE_TIME */
return( ret );
}
static int ssl_tls13_write_server_hello( mbedtls_ssl_context *ssl )
{
((void) ssl);
return( MBEDTLS_ERR_SSL_FEATURE_UNAVAILABLE );
int ret = 0;
unsigned char *buf;
size_t buf_len, msg_len;
MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> write server hello" ) );
/* Preprocessing */
/* This might lead to ssl_tls13_process_server_hello() being called
* multiple times. The implementation of
* ssl_tls13_process_server_hello_preprocess() must either be safe to be
* called multiple times, or we need to add state to omit this call once
* we're calling ssl_tls13_process_server_hello() multiple times.
*/
MBEDTLS_SSL_PROC_CHK( ssl_tls13_prepare_server_hello( ssl ) );
MBEDTLS_SSL_PROC_CHK( mbedtls_ssl_tls13_start_handshake_msg( ssl,
MBEDTLS_SSL_HS_SERVER_HELLO, &buf, &buf_len ) );
MBEDTLS_SSL_PROC_CHK( ssl_tls13_write_server_hello_body( ssl, buf, buf_len,
&msg_len ) );
mbedtls_ssl_tls13_add_hs_msg_to_checksum(
ssl, MBEDTLS_SSL_HS_SERVER_HELLO, buf, msg_len );
MBEDTLS_SSL_PROC_CHK( ssl_tls13_finalize_server_hello( ssl ) );
MBEDTLS_SSL_PROC_CHK( mbedtls_ssl_tls13_finish_handshake_msg(
ssl, buf_len, msg_len ) );
cleanup:
MBEDTLS_SSL_DEBUG_MSG( 2, ( "<= write server hello" ) );
return( ret );
}
/*