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Merge 'mbedtls/development' into merge-crypto-unremoved-20200304

Browse Source 
Merge the latest state of the target branch (mbedtls/development) into the
pull request to merge mbed-crypto into mbedtls.

Conflicts:

* ChangeLog: add/add conflict. Resolve by using the usual section order.
This commit is contained in:
Gilles Peskine
2020-03-23 18:02:07 +01:00
parent 5ec51f923a 1fce45da6a
commit 5e7d6fd240
16 changed files with 717 additions and 63 deletions
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78
library/ssl_msg.c
View File

@ -179,11 +179,16 @@ static int ssl_next_record_is_in_datagram( mbedtls_ssl_context *ssl );
static size_t ssl_get_maximum_datagram_size( mbedtls_ssl_context const *ssl )
{
size_t mtu = mbedtls_ssl_get_current_mtu( ssl );
#if defined(MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH)
size_t out_buf_len = ssl->out_buf_len;
#else
size_t out_buf_len = MBEDTLS_SSL_OUT_BUFFER_LEN;
#endif
if( mtu != 0 && mtu < MBEDTLS_SSL_OUT_BUFFER_LEN )
if( mtu != 0 && mtu < out_buf_len )
return( mtu );
return( MBEDTLS_SSL_OUT_BUFFER_LEN );
return( out_buf_len );
}
static int ssl_get_remaining_space_in_datagram( mbedtls_ssl_context const *ssl )
@ -1574,6 +1579,11 @@ static int ssl_compress_buf( mbedtls_ssl_context *ssl )
ptrdiff_t bytes_written = ssl->out_msg - ssl->out_buf;
size_t len_pre = ssl->out_msglen;
unsigned char *msg_pre = ssl->compress_buf;
#if defined(MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH)
size_t out_buf_len = ssl->out_buf_len;
#else
size_t out_buf_len = MBEDTLS_SSL_OUT_BUFFER_LEN;
#endif
MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> compress buf" ) );
@ -1591,7 +1601,7 @@ static int ssl_compress_buf( mbedtls_ssl_context *ssl )
ssl->transform_out->ctx_deflate.next_in = msg_pre;
ssl->transform_out->ctx_deflate.avail_in = len_pre;
ssl->transform_out->ctx_deflate.next_out = msg_post;
ssl->transform_out->ctx_deflate.avail_out = MBEDTLS_SSL_OUT_BUFFER_LEN - bytes_written;
ssl->transform_out->ctx_deflate.avail_out = out_buf_len - bytes_written;
ret = deflate( &ssl->transform_out->ctx_deflate, Z_SYNC_FLUSH );
if( ret != Z_OK )
@ -1600,7 +1610,7 @@ static int ssl_compress_buf( mbedtls_ssl_context *ssl )
return( MBEDTLS_ERR_SSL_COMPRESSION_FAILED );
}
ssl->out_msglen = MBEDTLS_SSL_OUT_BUFFER_LEN -
ssl->out_msglen = out_buf_len -
ssl->transform_out->ctx_deflate.avail_out - bytes_written;
MBEDTLS_SSL_DEBUG_MSG( 3, ( "after compression: msglen = %d, ",
@ -1621,6 +1631,11 @@ static int ssl_decompress_buf( mbedtls_ssl_context *ssl )
ptrdiff_t header_bytes = ssl->in_msg - ssl->in_buf;
size_t len_pre = ssl->in_msglen;
unsigned char *msg_pre = ssl->compress_buf;
#if defined(MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH)
size_t in_buf_len = ssl->in_buf_len;
#else
size_t in_buf_len = MBEDTLS_SSL_IN_BUFFER_LEN;
#endif
MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> decompress buf" ) );
@ -1638,8 +1653,7 @@ static int ssl_decompress_buf( mbedtls_ssl_context *ssl )
ssl->transform_in->ctx_inflate.next_in = msg_pre;
ssl->transform_in->ctx_inflate.avail_in = len_pre;
ssl->transform_in->ctx_inflate.next_out = msg_post;
ssl->transform_in->ctx_inflate.avail_out = MBEDTLS_SSL_IN_BUFFER_LEN -
header_bytes;
ssl->transform_in->ctx_inflate.avail_out = in_buf_len - header_bytes;
ret = inflate( &ssl->transform_in->ctx_inflate, Z_SYNC_FLUSH );
if( ret != Z_OK )
@ -1648,7 +1662,7 @@ static int ssl_decompress_buf( mbedtls_ssl_context *ssl )
return( MBEDTLS_ERR_SSL_COMPRESSION_FAILED );
}
ssl->in_msglen = MBEDTLS_SSL_IN_BUFFER_LEN -
ssl->in_msglen = in_buf_len -
ssl->transform_in->ctx_inflate.avail_out - header_bytes;
MBEDTLS_SSL_DEBUG_MSG( 3, ( "after decompression: msglen = %d, ",
@ -1682,6 +1696,11 @@ int mbedtls_ssl_fetch_input( mbedtls_ssl_context *ssl, size_t nb_want )
{
int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
size_t len;
#if defined(MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH)
size_t in_buf_len = ssl->in_buf_len;
#else
size_t in_buf_len = MBEDTLS_SSL_IN_BUFFER_LEN;
#endif
MBEDTLS_SSL_DEBUG_MSG( 2, ( "=> fetch input" ) );
@ -1692,7 +1711,7 @@ int mbedtls_ssl_fetch_input( mbedtls_ssl_context *ssl, size_t nb_want )
return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
}
if( nb_want > MBEDTLS_SSL_IN_BUFFER_LEN - (size_t)( ssl->in_hdr - ssl->in_buf ) )
if( nb_want > in_buf_len - (size_t)( ssl->in_hdr - ssl->in_buf ) )
{
MBEDTLS_SSL_DEBUG_MSG( 1, ( "requesting more data than fits" ) );
return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
@ -1778,7 +1797,7 @@ int mbedtls_ssl_fetch_input( mbedtls_ssl_context *ssl, size_t nb_want )
}
else
{
len = MBEDTLS_SSL_IN_BUFFER_LEN - ( ssl->in_hdr - ssl->in_buf );
len = in_buf_len - ( ssl->in_hdr - ssl->in_buf );
if( ssl->state != MBEDTLS_SSL_HANDSHAKE_OVER )
timeout = ssl->handshake->retransmit_timeout;
@ -2032,7 +2051,7 @@ void mbedtls_ssl_flight_free( mbedtls_ssl_flight_item *flight )
/*
* Swap transform_out and out_ctr with the alternative ones
*/
static void ssl_swap_epochs( mbedtls_ssl_context *ssl )
static int ssl_swap_epochs( mbedtls_ssl_context *ssl )
{
mbedtls_ssl_transform *tmp_transform;
unsigned char tmp_out_ctr[8];
@ -2040,7 +2059,7 @@ static void ssl_swap_epochs( mbedtls_ssl_context *ssl )
if( ssl->transform_out == ssl->handshake->alt_transform_out )
{
MBEDTLS_SSL_DEBUG_MSG( 3, ( "skip swap epochs" ) );
return;
return( 0 );
}
MBEDTLS_SSL_DEBUG_MSG( 3, ( "swap epochs" ) );
@ -2061,13 +2080,16 @@ static void ssl_swap_epochs( mbedtls_ssl_context *ssl )
#if defined(MBEDTLS_SSL_HW_RECORD_ACCEL)
if( mbedtls_ssl_hw_record_activate != NULL )
{
if( ( ret = mbedtls_ssl_hw_record_activate( ssl, MBEDTLS_SSL_CHANNEL_OUTBOUND ) ) != 0 )
int ret = mbedtls_ssl_hw_record_activate( ssl, MBEDTLS_SSL_CHANNEL_OUTBOUND );
if( ret != 0 )
{
MBEDTLS_SSL_DEBUG_RET( 1, "mbedtls_ssl_hw_record_activate", ret );
return( MBEDTLS_ERR_SSL_HW_ACCEL_FAILED );
}
}
#endif
return( 0 );
}
/*
@ -2104,7 +2126,9 @@ int mbedtls_ssl_flight_transmit( mbedtls_ssl_context *ssl )
ssl->handshake->cur_msg = ssl->handshake->flight;
ssl->handshake->cur_msg_p = ssl->handshake->flight->p + 12;
ssl_swap_epochs( ssl );
ret = ssl_swap_epochs( ssl );
if( ret != 0 )
return( ret );
ssl->handshake->retransmit_state = MBEDTLS_SSL_RETRANS_SENDING;
}
@ -2127,7 +2151,9 @@ int mbedtls_ssl_flight_transmit( mbedtls_ssl_context *ssl )
if( is_finished && ssl->handshake->cur_msg_p == ( cur->p + 12 ) )
{
MBEDTLS_SSL_DEBUG_MSG( 2, ( "swap epochs to send finished message" ) );
ssl_swap_epochs( ssl );
ret = ssl_swap_epochs( ssl );
if( ret != 0 )
return( ret );
}
ret = ssl_get_remaining_payload_in_datagram( ssl );
@ -2164,7 +2190,11 @@ int mbedtls_ssl_flight_transmit( mbedtls_ssl_context *ssl )
if( ( max_frag_len < 12 ) || ( max_frag_len == 12 && hs_len != 0 ) )
{
if( is_finished )
ssl_swap_epochs( ssl );
{
ret = ssl_swap_epochs( ssl );
if( ret != 0 )
return( ret );
}
if( ( ret = mbedtls_ssl_flush_output( ssl ) ) != 0 )
return( ret );
@ -2523,7 +2553,11 @@ int mbedtls_ssl_write_record( mbedtls_ssl_context *ssl, uint8_t force_flush )
{
unsigned i;
size_t protected_record_size;
#if defined(MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH)
size_t out_buf_len = ssl->out_buf_len;
#else
size_t out_buf_len = MBEDTLS_SSL_OUT_BUFFER_LEN;
#endif
/* Skip writing the record content type to after the encryption,
* as it may change when using the CID extension. */
@ -2539,8 +2573,7 @@ int mbedtls_ssl_write_record( mbedtls_ssl_context *ssl, uint8_t force_flush )
mbedtls_record rec;
rec.buf = ssl->out_iv;
rec.buf_len = MBEDTLS_SSL_OUT_BUFFER_LEN -
( ssl->out_iv - ssl->out_buf );
rec.buf_len = out_buf_len - ( ssl->out_iv - ssl->out_buf );
rec.data_len = ssl->out_msglen;
rec.data_offset = ssl->out_msg - rec.buf;
@ -4216,7 +4249,11 @@ static int ssl_load_buffered_record( mbedtls_ssl_context *ssl )
unsigned char * rec;
size_t rec_len;
unsigned rec_epoch;
#if defined(MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH)
size_t in_buf_len = ssl->in_buf_len;
#else
size_t in_buf_len = MBEDTLS_SSL_IN_BUFFER_LEN;
#endif
if( ssl->conf->transport != MBEDTLS_SSL_TRANSPORT_DATAGRAM )
return( 0 );
@ -4246,8 +4283,7 @@ static int ssl_load_buffered_record( mbedtls_ssl_context *ssl )
MBEDTLS_SSL_DEBUG_MSG( 2, ( "Found buffered record from current epoch - load" ) );
/* Double-check that the record is not too large */
if( rec_len > MBEDTLS_SSL_IN_BUFFER_LEN -
(size_t)( ssl->in_hdr - ssl->in_buf ) )
if( rec_len > in_buf_len - (size_t)( ssl->in_hdr - ssl->in_buf ) )
{
MBEDTLS_SSL_DEBUG_MSG( 1, ( "should never happen" ) );
return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );

1
library/ssl_srv.c
View File

@ -840,6 +840,7 @@ static int ssl_pick_cert( mbedtls_ssl_context *ssl,
for( cur = list; cur != NULL; cur = cur->next )
{
flags = 0;
MBEDTLS_SSL_DEBUG_CRT( 3, "candidate certificate chain, certificate",
cur->cert );

166
library/ssl_tls.c
View File

@ -245,6 +245,29 @@ int mbedtls_ssl_session_copy( mbedtls_ssl_session *dst,
return( 0 );
}
#if defined(MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH)
static int resize_buffer( unsigned char **buffer, size_t len_new, size_t *len_old )
{
unsigned char* resized_buffer = mbedtls_calloc( 1, len_new );
if( resized_buffer == NULL )
return -1;
/* We want to copy len_new bytes when downsizing the buffer, and
* len_old bytes when upsizing, so we choose the smaller of two sizes,
* to fit one buffer into another. Size checks, ensuring that no data is
* lost, are done outside of this function. */
memcpy( resized_buffer, *buffer,
( len_new < *len_old ) ? len_new : *len_old );
mbedtls_platform_zeroize( *buffer, *len_old );
mbedtls_free( *buffer );
*buffer = resized_buffer;
*len_old = len_new;
return 0;
}
#endif /* MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH */
/*
* Key material generation
*/
@ -804,7 +827,7 @@ typedef int ssl_tls_prf_t(const unsigned char *, size_t, const char *,
* - [in] minor_ver: SSL/TLS minor version
* - [in] endpoint: client or server
* - [in] ssl: optionally used for:
* - MBEDTLS_SSL_HW_RECORD_ACCEL: whole context
* - MBEDTLS_SSL_HW_RECORD_ACCEL: whole context (non-const)
* - MBEDTLS_SSL_EXPORT_KEYS: ssl->conf->{f,p}_export_keys
* - MBEDTLS_DEBUG_C: ssl->conf->{f,p}_dbg
*/
@ -826,7 +849,10 @@ static int ssl_populate_transform( mbedtls_ssl_transform *transform,
const unsigned char randbytes[64],
int minor_ver,
unsigned endpoint,
const mbedtls_ssl_context *ssl )
#if !defined(MBEDTLS_SSL_HW_RECORD_ACCEL)
const
#endif
mbedtls_ssl_context *ssl )
{
int ret = 0;
#if defined(MBEDTLS_USE_PSA_CRYPTO)
@ -3643,6 +3669,43 @@ static int ssl_handshake_init( mbedtls_ssl_context *ssl )
{
ssl->handshake = mbedtls_calloc( 1, sizeof(mbedtls_ssl_handshake_params) );
}
#if defined(MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH)
/* If the buffers are too small - reallocate */
{
int modified = 0;
if( ssl->in_buf_len < MBEDTLS_SSL_IN_BUFFER_LEN )
{
if( resize_buffer( &ssl->in_buf, MBEDTLS_SSL_IN_BUFFER_LEN,
&ssl->in_buf_len ) != 0 )
{
MBEDTLS_SSL_DEBUG_MSG( 1, ( "input buffer resizing failed - out of memory" ) );
}
else
{
MBEDTLS_SSL_DEBUG_MSG( 2, ( "Reallocating in_buf to %d", MBEDTLS_SSL_IN_BUFFER_LEN ) );
modified = 1;
}
}
if( ssl->out_buf_len < MBEDTLS_SSL_OUT_BUFFER_LEN )
{
if( resize_buffer( &ssl->out_buf, MBEDTLS_SSL_OUT_BUFFER_LEN,
&ssl->out_buf_len ) != 0 )
{
MBEDTLS_SSL_DEBUG_MSG( 1, ( "output buffer resizing failed - out of memory" ) );
}
else
{
MBEDTLS_SSL_DEBUG_MSG( 2, ( "Reallocating out_buf to %d", MBEDTLS_SSL_OUT_BUFFER_LEN ) );
modified = 1;
}
}
if( modified )
{
/* Update pointers here to avoid doing it twice. */
mbedtls_ssl_reset_in_out_pointers( ssl );
}
}
#endif
/* All pointers should exist and can be directly freed without issue */
if( ssl->handshake == NULL ||
@ -3729,6 +3792,8 @@ int mbedtls_ssl_setup( mbedtls_ssl_context *ssl,
const mbedtls_ssl_config *conf )
{
int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
size_t in_buf_len = MBEDTLS_SSL_IN_BUFFER_LEN;
size_t out_buf_len = MBEDTLS_SSL_OUT_BUFFER_LEN;
ssl->conf = conf;
@ -3739,18 +3804,24 @@ int mbedtls_ssl_setup( mbedtls_ssl_context *ssl,
/* Set to NULL in case of an error condition */
ssl->out_buf = NULL;
ssl->in_buf = mbedtls_calloc( 1, MBEDTLS_SSL_IN_BUFFER_LEN );
#if defined(MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH)
ssl->in_buf_len = in_buf_len;
#endif
ssl->in_buf = mbedtls_calloc( 1, in_buf_len );
if( ssl->in_buf == NULL )
{
MBEDTLS_SSL_DEBUG_MSG( 1, ( "alloc(%d bytes) failed", MBEDTLS_SSL_IN_BUFFER_LEN) );
MBEDTLS_SSL_DEBUG_MSG( 1, ( "alloc(%d bytes) failed", in_buf_len ) );
ret = MBEDTLS_ERR_SSL_ALLOC_FAILED;
goto error;
}
ssl->out_buf = mbedtls_calloc( 1, MBEDTLS_SSL_OUT_BUFFER_LEN );
#if defined(MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH)
ssl->out_buf_len = out_buf_len;
#endif
ssl->out_buf = mbedtls_calloc( 1, out_buf_len );
if( ssl->out_buf == NULL )
{
MBEDTLS_SSL_DEBUG_MSG( 1, ( "alloc(%d bytes) failed", MBEDTLS_SSL_OUT_BUFFER_LEN) );
MBEDTLS_SSL_DEBUG_MSG( 1, ( "alloc(%d bytes) failed", out_buf_len ) );
ret = MBEDTLS_ERR_SSL_ALLOC_FAILED;
goto error;
}
@ -3768,6 +3839,10 @@ error:
ssl->conf = NULL;
#if defined(MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH)
ssl->in_buf_len = 0;
ssl->out_buf_len = 0;
#endif
ssl->in_buf = NULL;
ssl->out_buf = NULL;
@ -3796,6 +3871,13 @@ error:
int mbedtls_ssl_session_reset_int( mbedtls_ssl_context *ssl, int partial )
{
int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
#if defined(MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH)
size_t in_buf_len = ssl->in_buf_len;
size_t out_buf_len = ssl->out_buf_len;
#else
size_t in_buf_len = MBEDTLS_SSL_IN_BUFFER_LEN;
size_t out_buf_len = MBEDTLS_SSL_OUT_BUFFER_LEN;
#endif
#if !defined(MBEDTLS_SSL_DTLS_CLIENT_PORT_REUSE) || \
!defined(MBEDTLS_SSL_SRV_C)
@ -3851,14 +3933,14 @@ int mbedtls_ssl_session_reset_int( mbedtls_ssl_context *ssl, int partial )
ssl->session_in = NULL;
ssl->session_out = NULL;
memset( ssl->out_buf, 0, MBEDTLS_SSL_OUT_BUFFER_LEN );
memset( ssl->out_buf, 0, out_buf_len );
#if defined(MBEDTLS_SSL_DTLS_CLIENT_PORT_REUSE) && defined(MBEDTLS_SSL_SRV_C)
if( partial == 0 )
#endif /* MBEDTLS_SSL_DTLS_CLIENT_PORT_REUSE && MBEDTLS_SSL_SRV_C */
{
ssl->in_left = 0;
memset( ssl->in_buf, 0, MBEDTLS_SSL_IN_BUFFER_LEN );
memset( ssl->in_buf, 0, in_buf_len );
}
#if defined(MBEDTLS_SSL_HW_RECORD_ACCEL)
@ -5799,6 +5881,60 @@ void mbedtls_ssl_handshake_free( mbedtls_ssl_context *ssl )
mbedtls_platform_zeroize( handshake,
sizeof( mbedtls_ssl_handshake_params ) );
#if defined(MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH)
/* If the buffers are too big - reallocate. Because of the way Mbed TLS
* processes datagrams and the fact that a datagram is allowed to have
* several records in it, it is possible that the I/O buffers are not
* empty at this stage */
{
int modified = 0;
uint32_t buf_len = mbedtls_ssl_get_input_buflen( ssl );
size_t written_in = 0;
size_t written_out = 0;
if( ssl->in_buf != NULL &&
ssl->in_buf_len > buf_len &&
ssl->in_left < buf_len )
{
written_in = ssl->in_msg - ssl->in_buf;
if( resize_buffer( &ssl->in_buf, buf_len, &ssl->in_buf_len ) != 0 )
{
MBEDTLS_SSL_DEBUG_MSG( 1, ( "input buffer resizing failed - out of memory" ) );
}
else
{
MBEDTLS_SSL_DEBUG_MSG( 2, ( "Reallocating in_buf to %d", buf_len ) );
modified = 1;
}
}
buf_len = mbedtls_ssl_get_output_buflen( ssl );
if( ssl->out_buf != NULL &&
ssl->out_buf_len > mbedtls_ssl_get_output_buflen( ssl ) &&
ssl->out_left < buf_len )
{
written_out = ssl->out_msg - ssl->out_buf;
if( resize_buffer( &ssl->out_buf, buf_len, &ssl->out_buf_len ) != 0 )
{
MBEDTLS_SSL_DEBUG_MSG( 1, ( "output buffer resizing failed - out of memory" ) );
}
else
{
MBEDTLS_SSL_DEBUG_MSG( 2, ( "Reallocating out_buf to %d", buf_len ) );
modified = 1;
}
}
if( modified )
{
/* Update pointers here to avoid doing it twice. */
mbedtls_ssl_reset_in_out_pointers( ssl );
/* Fields below might not be properly updated with record
* splitting, so they are manually updated here. */
ssl->out_msg = ssl->out_buf + written_out;
ssl->in_msg = ssl->in_buf + written_in;
}
}
#endif
}
void mbedtls_ssl_session_free( mbedtls_ssl_session *session )
@ -6463,6 +6599,14 @@ int mbedtls_ssl_context_load( mbedtls_ssl_context *context,
*/
void mbedtls_ssl_free( mbedtls_ssl_context *ssl )
{
#if defined(MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH)
size_t in_buf_len = ssl->in_buf_len;
size_t out_buf_len = ssl->out_buf_len;
#else
size_t in_buf_len = MBEDTLS_SSL_IN_BUFFER_LEN;
size_t out_buf_len = MBEDTLS_SSL_OUT_BUFFER_LEN;
#endif
if( ssl == NULL )
return;
@ -6470,14 +6614,16 @@ void mbedtls_ssl_free( mbedtls_ssl_context *ssl )
if( ssl->out_buf != NULL )
{
mbedtls_platform_zeroize( ssl->out_buf, MBEDTLS_SSL_OUT_BUFFER_LEN );
mbedtls_platform_zeroize( ssl->out_buf, out_buf_len );
mbedtls_free( ssl->out_buf );
ssl->out_buf = NULL;
}
if( ssl->in_buf != NULL )
{
mbedtls_platform_zeroize( ssl->in_buf, MBEDTLS_SSL_IN_BUFFER_LEN );
mbedtls_platform_zeroize( ssl->in_buf, in_buf_len );
mbedtls_free( ssl->in_buf );
ssl->in_buf = NULL;
}
#if defined(MBEDTLS_ZLIB_SUPPORT)

3
library/version_features.c
View File

@ -549,6 +549,9 @@ static const char * const features[] = {
#if defined(MBEDTLS_SSL_TRUNCATED_HMAC)
"MBEDTLS_SSL_TRUNCATED_HMAC",
#endif /* MBEDTLS_SSL_TRUNCATED_HMAC */
#if defined(MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH)
"MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH",
#endif /* MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH */
#if defined(MBEDTLS_SSL_TRUNCATED_HMAC_COMPAT)
"MBEDTLS_SSL_TRUNCATED_HMAC_COMPAT",
#endif /* MBEDTLS_SSL_TRUNCATED_HMAC_COMPAT */