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Remove MBEDTLS_SSL_EXPORT_KEYS, making it always on

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This option only gated an ability to set a callback,
but was deemed unnecessary as it was yet another define to
remember when writing tests, or test configurations. Fixes #4653.
Signed-off-by: Andrzej Kurek <andrzej.kurek@arm.com>
This commit is contained in:
Andrzej Kurek 2021-09-28 10:00:32 -04:00
parent b19be6b5f3
commit 5902cd64e2
10 changed files with 10 additions and 62 deletions
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5
ChangeLog.d/remove-ssl-export-keys.txt Normal file
View file

@ -0,0 +1,5 @@
Changes
* Remove MBEDTLS_SSL_EXPORT_KEYS, making it always on and increasing the
code size by about 80B on an M0 build. This option only gated an ability
to set a callback, but was deemed unnecessary as it was yet another define
to remember when writing tests, or test configurations. Fixes #4653.

1
configs/config-thread.h
View file

@ -45,7 +45,6 @@
#define MBEDTLS_SSL_PROTO_DTLS
#define MBEDTLS_SSL_DTLS_ANTI_REPLAY
#define MBEDTLS_SSL_DTLS_HELLO_VERIFY
#define MBEDTLS_SSL_EXPORT_KEYS
/* mbed TLS modules */
#define MBEDTLS_AES_C

10
include/mbedtls/mbedtls_config.h
View file

@ -1598,16 +1598,6 @@
*/
#define MBEDTLS_SSL_SESSION_TICKETS
/**
* \def MBEDTLS_SSL_EXPORT_KEYS
*
* Enable support for exporting key block and master secret.
* This is required for certain users of TLS, e.g. EAP-TLS.
*
* Comment this macro to disable support for key export
*/
#define MBEDTLS_SSL_EXPORT_KEYS
/**
* \def MBEDTLS_SSL_SERVER_NAME_INDICATION
*

6
include/mbedtls/ssl.h
View file

@ -1139,7 +1139,6 @@ typedef enum
}
mbedtls_tls_prf_types;
#if defined(MBEDTLS_SSL_EXPORT_KEYS)
typedef enum
{
MBEDTLS_SSL_KEY_EXPORT_TLS12_MASTER_SECRET = 0,
@ -1175,7 +1174,6 @@ typedef void mbedtls_ssl_export_keys_t( void *p_expkey,
const unsigned char client_random[32],
const unsigned char server_random[32],
mbedtls_tls_prf_types tls_prf_type );
#endif /* MBEDTLS_SSL_EXPORT_KEYS */
/**
* SSL/TLS configuration to be shared between mbedtls_ssl_context structures.
@ -1617,11 +1615,9 @@ struct mbedtls_ssl_context
* and #MBEDTLS_SSL_CID_DISABLED. */
#endif /* MBEDTLS_SSL_DTLS_CONNECTION_ID */
#if defined(MBEDTLS_SSL_EXPORT_KEYS)
/** Callback to export key block and master secret */
mbedtls_ssl_export_keys_t *MBEDTLS_PRIVATE(f_export_keys);
void *MBEDTLS_PRIVATE(p_export_keys); /*!< context for key export callback */
#endif
};
/**
@ -2194,7 +2190,6 @@ void mbedtls_ssl_conf_session_tickets_cb( mbedtls_ssl_config *conf,
void *p_ticket );
#endif /* MBEDTLS_SSL_SESSION_TICKETS && MBEDTLS_SSL_SRV_C */
#if defined(MBEDTLS_SSL_EXPORT_KEYS)
/**
* \brief Configure a key export callback.
* (Default: none.)
@ -2216,7 +2211,6 @@ void mbedtls_ssl_conf_session_tickets_cb( mbedtls_ssl_config *conf,
void mbedtls_ssl_set_export_keys_cb( mbedtls_ssl_context *ssl,
mbedtls_ssl_export_keys_t *f_export_keys,
void *p_export_keys );
#endif /* MBEDTLS_SSL_EXPORT_KEYS */
#if defined(MBEDTLS_SSL_ASYNC_PRIVATE)
/**

16
library/ssl_tls.c
View file

@ -587,7 +587,6 @@ static int ssl_use_opaque_psk( mbedtls_ssl_context const *ssl )
#endif /* MBEDTLS_USE_PSA_CRYPTO &&
MBEDTLS_KEY_EXCHANGE_PSK_ENABLED */
#if defined(MBEDTLS_SSL_EXPORT_KEYS)
static mbedtls_tls_prf_types tls_prf_get_type( mbedtls_ssl_tls_prf_cb *tls_prf )
{
#if defined(MBEDTLS_SSL_PROTO_TLS1_2)
@ -608,7 +607,6 @@ static mbedtls_tls_prf_types tls_prf_get_type( mbedtls_ssl_tls_prf_cb *tls_prf )
#endif /* MBEDTLS_SSL_PROTO_TLS1_2 */
return( MBEDTLS_SSL_TLS_PRF_NONE );
}
#endif /* MBEDTLS_SSL_EXPORT_KEYS */
int mbedtls_ssl_tls_prf( const mbedtls_tls_prf_types prf,
const unsigned char *secret, size_t slen,
@ -660,8 +658,9 @@ typedef int ssl_tls_prf_t(const unsigned char *, size_t, const char *,
* - [in] randbytes: buffer holding ServerHello.random + ClientHello.random
* - [in] minor_ver: SSL/TLS minor version
* - [in] endpoint: client or server
* - [in] ssl: optionally used for:
* - MBEDTLS_SSL_EXPORT_KEYS: ssl->conf->{f,p}_export_keys
* - [in] ssl: used for:
* - ssl->conf->{f,p}_export_keys
* [in] optionally used for:
* - MBEDTLS_DEBUG_C: ssl->conf->{f,p}_dbg
*/
static int ssl_tls12_populate_transform( mbedtls_ssl_transform *transform,
@ -694,9 +693,8 @@ static int ssl_tls12_populate_transform( mbedtls_ssl_transform *transform,
const mbedtls_cipher_info_t *cipher_info;
const mbedtls_md_info_t *md_info;
#if !defined(MBEDTLS_SSL_EXPORT_KEYS) && \
!defined(MBEDTLS_DEBUG_C)
ssl = NULL; /* make sure we don't use it except for those cases */
#if !defined(MBEDTLS_DEBUG_C)
ssl = NULL; /* make sure we don't use it except for this case */
(void) ssl;
#endif
@ -960,7 +958,6 @@ static int ssl_tls12_populate_transform( mbedtls_ssl_transform *transform,
((void) mac_dec);
((void) mac_enc);
#if defined(MBEDTLS_SSL_EXPORT_KEYS)
if( ssl->f_export_keys != NULL )
{
ssl->f_export_keys( ssl->p_export_keys,
@ -970,7 +967,6 @@ static int ssl_tls12_populate_transform( mbedtls_ssl_transform *transform,
randbytes,
tls_prf_get_type( tls_prf ) );
}
#endif
#if defined(MBEDTLS_USE_PSA_CRYPTO)
@ -4229,7 +4225,6 @@ void mbedtls_ssl_conf_session_tickets_cb( mbedtls_ssl_config *conf,
#endif
#endif /* MBEDTLS_SSL_SESSION_TICKETS */
#if defined(MBEDTLS_SSL_EXPORT_KEYS)
void mbedtls_ssl_set_export_keys_cb( mbedtls_ssl_context *ssl,
mbedtls_ssl_export_keys_t *f_export_keys,
void *p_export_keys )
@ -4237,7 +4232,6 @@ void mbedtls_ssl_set_export_keys_cb( mbedtls_ssl_context *ssl,
ssl->f_export_keys = f_export_keys;
ssl->p_export_keys = p_export_keys;
}
#endif
#if defined(MBEDTLS_SSL_ASYNC_PRIVATE)
void mbedtls_ssl_conf_async_private_cb(

13
programs/ssl/ssl_client2.c
View file

@ -207,7 +207,6 @@ int main( void )
#define USAGE_TICKETS ""
#endif /* MBEDTLS_SSL_SESSION_TICKETS */
#if defined(MBEDTLS_SSL_EXPORT_KEYS)
#define USAGE_EAP_TLS \
" eap_tls=%%d default: 0 (disabled)\n"
#define USAGE_NSS_KEYLOG \
@ -230,12 +229,6 @@ int main( void )
#else /* MBEDTLS_SSL_DTLS_SRTP */
#define USAGE_SRTP ""
#endif
#else /* MBEDTLS_SSL_EXPORT_KEYS */
#define USAGE_EAP_TLS ""
#define USAGE_NSS_KEYLOG ""
#define USAGE_NSS_KEYLOG_FILE ""
#define USAGE_SRTP ""
#endif /* MBEDTLS_SSL_EXPORT_KEYS */
#if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH)
#define USAGE_MAX_FRAG_LEN \
@ -729,7 +722,6 @@ int main( int argc, char *argv[] )
unsigned char *context_buf = NULL;
size_t context_buf_len;
#endif
#if defined(MBEDTLS_SSL_EXPORT_KEYS)
unsigned char eap_tls_keymaterial[16];
unsigned char eap_tls_iv[8];
const char* eap_tls_label = "client EAP encryption";
@ -747,7 +739,6 @@ int main( int argc, char *argv[] )
MBEDTLS_TLS_SRTP_UNSET
};
#endif /* MBEDTLS_SSL_DTLS_SRTP */
#endif /* MBEDTLS_SSL_EXPORT_KEYS */
#if defined(MBEDTLS_MEMORY_BUFFER_ALLOC_C)
mbedtls_memory_buffer_alloc_init( alloc_buf, sizeof(alloc_buf) );
@ -1962,7 +1953,6 @@ int main( int argc, char *argv[] )
goto exit;
}
#if defined(MBEDTLS_SSL_EXPORT_KEYS)
if( opt.eap_tls != 0 )
{
mbedtls_ssl_set_export_keys_cb( &ssl, eap_tls_key_derivation,
@ -1981,7 +1971,6 @@ int main( int argc, char *argv[] )
&dtls_srtp_keying );
}
#endif /* MBEDTLS_SSL_DTLS_SRTP */
#endif /* MBEDTLS_SSL_EXPORT_KEYS */
#if defined(MBEDTLS_X509_CRT_PARSE_C)
if( ( ret = mbedtls_ssl_set_hostname( &ssl, opt.server_name ) ) != 0 )
@ -2169,7 +2158,6 @@ int main( int argc, char *argv[] )
}
#endif
#if defined(MBEDTLS_SSL_EXPORT_KEYS)
if( opt.eap_tls != 0 )
{
size_t j = 0;
@ -2286,7 +2274,6 @@ int main( int argc, char *argv[] )
}
}
#endif /* MBEDTLS_SSL_DTLS_SRTP */
#endif /* MBEDTLS_SSL_EXPORT_KEYS */
if( opt.reconnect != 0 )
{
mbedtls_printf(" . Saving session for reuse..." );

13
programs/ssl/ssl_server2.c
View file

@ -278,7 +278,6 @@ int main( void )
#define USAGE_TICKETS ""
#endif /* MBEDTLS_SSL_SESSION_TICKETS */
#if defined(MBEDTLS_SSL_EXPORT_KEYS)
#define USAGE_EAP_TLS \
" eap_tls=%%d default: 0 (disabled)\n"
#define USAGE_NSS_KEYLOG \
@ -299,12 +298,6 @@ int main( void )
#else /* MBEDTLS_SSL_DTLS_SRTP */
#define USAGE_SRTP ""
#endif
#else /* MBEDTLS_SSL_EXPORT_KEYS */
#define USAGE_EAP_TLS ""
#define USAGE_NSS_KEYLOG ""
#define USAGE_NSS_KEYLOG_FILE ""
#define USAGE_SRTP ""
#endif /* MBEDTLS_SSL_EXPORT_KEYS */
#if defined(MBEDTLS_SSL_CACHE_C)
#define USAGE_CACHE \
@ -1365,7 +1358,6 @@ int main( int argc, char *argv[] )
#if defined(MBEDTLS_USE_PSA_CRYPTO)
psa_status_t status;
#endif
#if defined(MBEDTLS_SSL_EXPORT_KEYS)
unsigned char eap_tls_keymaterial[16];
unsigned char eap_tls_iv[8];
const char* eap_tls_label = "client EAP encryption";
@ -1383,7 +1375,6 @@ int main( int argc, char *argv[] )
MBEDTLS_TLS_SRTP_UNSET
};
#endif /* MBEDTLS_SSL_DTLS_SRTP */
#endif /* MBEDTLS_SSL_EXPORT_KEYS */
#if defined(MBEDTLS_MEMORY_BUFFER_ALLOC_C)
mbedtls_memory_buffer_alloc_init( alloc_buf, sizeof(alloc_buf) );
@ -2966,7 +2957,6 @@ int main( int argc, char *argv[] )
goto exit;
}
#if defined(MBEDTLS_SSL_EXPORT_KEYS)
if( opt.eap_tls != 0 )
{
mbedtls_ssl_set_export_keys_cb( &ssl, eap_tls_key_derivation,
@ -2985,7 +2975,6 @@ int main( int argc, char *argv[] )
&dtls_srtp_keying );
}
#endif /* MBEDTLS_SSL_DTLS_SRTP */
#endif /* MBEDTLS_SSL_EXPORT_KEYS */
io_ctx.ssl = &ssl;
io_ctx.net = &client_fd;
@ -3251,7 +3240,6 @@ handshake:
#endif /* MBEDTLS_X509_REMOVE_INFO */
#endif /* MBEDTLS_X509_CRT_PARSE_C */
#if defined(MBEDTLS_SSL_EXPORT_KEYS)
if( opt.eap_tls != 0 )
{
size_t j = 0;
@ -3369,7 +3357,6 @@ handshake:
}
}
#endif /* MBEDTLS_SSL_DTLS_SRTP */
#endif /* MBEDTLS_SSL_EXPORT_KEYS */
#if defined(MBEDTLS_SSL_DTLS_CONNECTION_ID)
ret = report_cid_usage( &ssl, "initial handshake" );

3
programs/ssl/ssl_test_common_source.c
View file

@ -24,7 +24,6 @@
* limitations under the License.
*/
#if defined(MBEDTLS_SSL_EXPORT_KEYS)
void eap_tls_key_derivation( void *p_expkey,
mbedtls_ssl_key_export_type secret_type,
const unsigned char *secret,
@ -140,8 +139,6 @@ void dtls_srtp_key_derivation( void *p_expkey,
}
#endif /* MBEDTLS_SSL_DTLS_SRTP */
#endif /* MBEDTLS_SSL_EXPORT_KEYS */
int ssl_check_record( mbedtls_ssl_context const *ssl,
unsigned char const *buf, size_t len )
{

4
programs/ssl/ssl_test_lib.h
View file

@ -95,8 +95,6 @@
#include "../test/query_config.h"
#if defined(MBEDTLS_SSL_EXPORT_KEYS)
typedef struct eap_tls_keys
{
unsigned char master_secret[48];
@ -122,8 +120,6 @@ typedef struct dtls_srtp_keys
#endif /* MBEDTLS_SSL_DTLS_SRTP */
#endif /* MBEDTLS_SSL_EXPORT_KEYS */
typedef struct
{
mbedtls_ssl_context *ssl;

1
tests/ssl-opt.sh
View file

@ -8613,7 +8613,6 @@ run_test "DTLS proxy: 3d, gnutls server, fragmentation, nbio" \
-s "Extra-header:" \
-c "Extra-header:"
requires_config_enabled MBEDTLS_SSL_EXPORT_KEYS
run_test "export keys functionality" \
"$P_SRV eap_tls=1 debug_level=3" \
"$P_CLI eap_tls=1 debug_level=3" \