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Merge pull request #3800 from AndrzejKurek/variable-buffers-baremetal

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Sideport the variable IO buffer size feature to baremetal
This commit is contained in:
Andrzej Kurek 2020-10-19 10:29:27 +02:00 committed by GitHub
commit 21afee2304
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GPG Key ID: 4AEE18F83AFDEB23
11 changed files with 826 additions and 71 deletions
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3
configs/baremetal.h
View File

@ -115,6 +115,9 @@
#define MBEDTLS_SSL_CONF_ENFORCE_EXTENDED_MASTER_SECRET \
MBEDTLS_SSL_EXTENDED_MS_ENFORCE_ENABLED
#define MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH
#define MBEDTLS_SSL_MAX_FRAGMENT_LENGTH
#define MBEDTLS_USE_TINYCRYPT
#define MBEDTLS_HAVE_ASM
#if !( defined(__STRICT_ANSI__) && defined(__CC_ARM) )

7
include/mbedtls/config.h
View File

@ -1909,6 +1909,13 @@
*/
//#define MBEDTLS_SSL_TRUNCATED_HMAC_COMPAT
/**
* \def MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH
*
* Enable modifying the maximum I/O buffer size.
*/
//#define MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH
/**
* \def MBEDTLS_THREADING_ALT
*

67
include/mbedtls/ssl.h
View File

@ -1370,6 +1370,10 @@ struct mbedtls_ssl_context
int in_msgtype; /*!< record header: message type */
size_t in_msglen; /*!< record header: message length */
size_t in_left; /*!< amount of data read so far */
#if defined(MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH)
size_t in_buf_len; /*!< length of input buffer */
#endif
#if defined(MBEDTLS_SSL_PROTO_DTLS)
size_t next_record_offset; /*!< offset of the next record in datagram
(equal to in_left if none) */
@ -1399,6 +1403,9 @@ struct mbedtls_ssl_context
int out_msgtype; /*!< record header: message type */
size_t out_msglen; /*!< record header: message length */
size_t out_left; /*!< amount of data not yet written */
#if defined(MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH)
size_t out_buf_len; /*!< length of output buffer */
#endif
#if defined(MBEDTLS_ZLIB_SUPPORT)
unsigned char *compress_buf; /*!< zlib data buffer */
@ -3597,18 +3604,61 @@ int mbedtls_ssl_get_record_expansion( const mbedtls_ssl_context *ssl );
#if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH)
/**
* \brief Return the maximum fragment length (payload, in bytes).
* This is the value negotiated with peer if any,
* or the locally configured value.
* \brief Return the maximum fragment length (payload, in bytes) for
* the output buffer. For the client, this is the configured
* value. For the server, it is the minimum of two - the
* configured value and the negotiated one.
*
* \sa mbedtls_ssl_conf_max_frag_len()
* \sa mbedtls_ssl_get_max_record_payload()
*
* \param ssl SSL context
*
* \return Current maximum fragment length.
* \return Current maximum fragment length for the output buffer.
*/
size_t mbedtls_ssl_get_max_frag_len( const mbedtls_ssl_context *ssl );
size_t mbedtls_ssl_get_output_max_frag_len( const mbedtls_ssl_context *ssl );
/**
* \brief Return the maximum fragment length (payload, in bytes) for
* the input buffer. This is the negotiated maximum fragment
* length, or, if there is none, MBEDTLS_SSL_MAX_CONTENT_LEN.
* If it is not defined either, the value is 2^14. This function
* works as its predecessor, \c mbedtls_ssl_get_max_frag_len().
*
* \sa mbedtls_ssl_conf_max_frag_len()
* \sa mbedtls_ssl_get_max_record_payload()
*
* \param ssl SSL context
*
* \return Current maximum fragment length for the output buffer.
*/
size_t mbedtls_ssl_get_input_max_frag_len( const mbedtls_ssl_context *ssl );
#if !defined(MBEDTLS_DEPRECATED_REMOVED)
#if defined(MBEDTLS_DEPRECATED_WARNING)
#define MBEDTLS_DEPRECATED __attribute__((deprecated))
#else
#define MBEDTLS_DEPRECATED
#endif
/**
* \brief This function is a deprecated approach to getting the max
* fragment length. Its an alias for
* \c mbedtls_ssl_get_output_max_frag_len(), as the behaviour
* is the same. See \c mbedtls_ssl_get_output_max_frag_len() for
* more detail.
*
* \sa mbedtls_ssl_get_input_max_frag_len()
* \sa mbedtls_ssl_get_output_max_frag_len()
*
* \param ssl SSL context
*
* \return Current maximum fragment length for the output buffer.
*/
MBEDTLS_DEPRECATED size_t mbedtls_ssl_get_max_frag_len(
const mbedtls_ssl_context *ssl );
#endif /* MBEDTLS_DEPRECATED_REMOVED */
#endif /* MBEDTLS_SSL_MAX_FRAGMENT_LENGTH */
/**
@ -3629,7 +3679,8 @@ size_t mbedtls_ssl_get_max_frag_len( const mbedtls_ssl_context *ssl );
* when record compression is enabled.
*
* \sa mbedtls_ssl_set_mtu()
* \sa mbedtls_ssl_get_max_frag_len()
* \sa mbedtls_ssl_get_output_max_frag_len()
* \sa mbedtls_ssl_get_input_max_frag_len()
* \sa mbedtls_ssl_get_record_expansion()
*
* \param ssl SSL context
@ -3930,8 +3981,8 @@ int mbedtls_ssl_read( mbedtls_ssl_context *ssl, unsigned char *buf, size_t len )
* or negotiated with the peer), then:
* - with TLS, less bytes than requested are written.
* - with DTLS, MBEDTLS_ERR_SSL_BAD_INPUT_DATA is returned.
* \c mbedtls_ssl_get_max_frag_len() may be used to query the
* active maximum fragment length.
* \c mbedtls_ssl_get_output_max_frag_len() may be used to
* query the active maximum fragment length.
*
* \note Attempting to write 0 bytes will result in an empty TLS
* application record being sent.

30
include/mbedtls/ssl_internal.h
View File

@ -260,7 +260,7 @@
implicit sequence number. */
#define MBEDTLS_SSL_HEADER_LEN 13
#if defined(MBEDTLS_SSL_DTLS_CONNECTION_ID)
#if !defined(MBEDTLS_SSL_DTLS_CONNECTION_ID)
#define MBEDTLS_SSL_IN_BUFFER_LEN \
( ( MBEDTLS_SSL_HEADER_LEN ) + ( MBEDTLS_SSL_IN_PAYLOAD_LEN ) )
#else
@ -269,7 +269,7 @@
+ ( MBEDTLS_SSL_CID_IN_LEN_MAX ) )
#endif
#if defined(MBEDTLS_SSL_DTLS_CONNECTION_ID)
#if !defined(MBEDTLS_SSL_DTLS_CONNECTION_ID)
#define MBEDTLS_SSL_OUT_BUFFER_LEN \
( ( MBEDTLS_SSL_HEADER_LEN ) + ( MBEDTLS_SSL_OUT_PAYLOAD_LEN ) )
#else
@ -278,6 +278,32 @@
+ ( MBEDTLS_SSL_CID_OUT_LEN_MAX ) )
#endif
#if defined(MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH)
static inline uint32_t mbedtls_ssl_get_output_buflen( const mbedtls_ssl_context *ctx )
{
#if defined (MBEDTLS_SSL_DTLS_CONNECTION_ID)
return (uint32_t) mbedtls_ssl_get_output_max_frag_len( ctx )
+ MBEDTLS_SSL_HEADER_LEN + MBEDTLS_SSL_PAYLOAD_OVERHEAD
+ MBEDTLS_SSL_CID_OUT_LEN_MAX;
#else
return (uint32_t) mbedtls_ssl_get_output_max_frag_len( ctx )
+ MBEDTLS_SSL_HEADER_LEN + MBEDTLS_SSL_PAYLOAD_OVERHEAD;
#endif
}
static inline uint32_t mbedtls_ssl_get_input_buflen( const mbedtls_ssl_context *ctx )
{
#if defined (MBEDTLS_SSL_DTLS_CONNECTION_ID)
return (uint32_t) mbedtls_ssl_get_input_max_frag_len( ctx )
+ MBEDTLS_SSL_HEADER_LEN + MBEDTLS_SSL_PAYLOAD_OVERHEAD
+ MBEDTLS_SSL_CID_IN_LEN_MAX;
#else
return (uint32_t) mbedtls_ssl_get_input_max_frag_len( ctx )
+ MBEDTLS_SSL_HEADER_LEN + MBEDTLS_SSL_PAYLOAD_OVERHEAD;
#endif
}
#endif
#ifdef MBEDTLS_ZLIB_SUPPORT
/* Compression buffer holds both IN and OUT buffers, so should be size of the larger */
#define MBEDTLS_SSL_COMPRESS_BUFFER_LEN ( \

295
library/ssl_tls.c
View File

@ -432,11 +432,16 @@ static size_t ssl_get_current_mtu( const mbedtls_ssl_context *ssl );
static size_t ssl_get_maximum_datagram_size( mbedtls_ssl_context const *ssl )
{
size_t mtu = 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 )
@ -462,7 +467,7 @@ static int ssl_get_remaining_payload_in_datagram( mbedtls_ssl_context const *ssl
size_t max_len = MBEDTLS_SSL_OUT_CONTENT_LEN;
#if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH)
const size_t mfl = mbedtls_ssl_get_max_frag_len( ssl );
const size_t mfl = mbedtls_ssl_get_output_max_frag_len( ssl );
if( max_len > mfl )
max_len = mfl;
@ -640,6 +645,29 @@ 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 */
#if defined(MBEDTLS_SSL_HW_RECORD_ACCEL)
int (*mbedtls_ssl_hw_record_init)( mbedtls_ssl_context *ssl,
const unsigned char *key_enc, const unsigned char *key_dec,
@ -3810,6 +3838,11 @@ 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" ) );
@ -3827,7 +3860,7 @@ 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 )
@ -3836,7 +3869,7 @@ 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, ",
@ -3857,6 +3890,11 @@ 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" ) );
@ -3874,7 +3912,7 @@ 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 -
ssl->transform_in->ctx_inflate.avail_out = in_buf_len -
header_bytes;
ret = inflate( &ssl->transform_in->ctx_inflate, Z_SYNC_FLUSH );
@ -3884,7 +3922,7 @@ 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, ",
@ -3951,6 +3989,11 @@ int mbedtls_ssl_fetch_input( mbedtls_ssl_context *ssl, size_t nb_want )
{
int ret;
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" ) );
@ -3962,7 +4005,7 @@ 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 );
@ -4049,7 +4092,7 @@ 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;
@ -4821,6 +4864,11 @@ int mbedtls_ssl_write_record( mbedtls_ssl_context *ssl, uint8_t force_flush )
unsigned i;
size_t protected_record_size;
volatile int encrypted_fi = 0;
#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. */
@ -4837,8 +4885,7 @@ 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;
@ -6563,6 +6610,11 @@ 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( MBEDTLS_SSL_TRANSPORT_IS_TLS( ssl->conf->transport ) )
return( 0 );
@ -6593,8 +6645,7 @@ 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 );
@ -8761,6 +8812,66 @@ 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;
size_t written_in = 0, len_offset_in = 0;
size_t written_out = 0, iv_offset_out = 0, len_offset_out = 0;
if( ssl->in_buf != NULL )
{
written_in = ssl->in_msg - ssl->in_buf;
len_offset_in = ssl->in_len - ssl->in_buf;
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 != NULL )
{
written_out = ssl->out_msg - ssl->out_buf;
iv_offset_out = ssl->out_iv - ssl->out_buf;
len_offset_out = ssl->out_len - ssl->out_buf;
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. */
ssl_reset_in_out_pointers( ssl );
/* Fields below might not be properly updated with record
* splitting or with CID, so they are manually updated here. */
ssl->out_msg = ssl->out_buf + written_out;
ssl->out_len = ssl->out_buf + len_offset_out;
ssl->out_iv = ssl->out_buf + iv_offset_out;
ssl->in_msg = ssl->in_buf + written_in;
ssl->in_len = ssl->in_buf + len_offset_in;
}
}
#endif
/* All pointers should exist and can be directly freed without issue */
if( ssl->handshake == NULL ||
ssl->transform_negotiate == NULL ||
@ -8966,6 +9077,8 @@ int mbedtls_ssl_setup( mbedtls_ssl_context *ssl,
const mbedtls_ssl_config *conf )
{
int ret;
size_t in_buf_len = MBEDTLS_SSL_IN_BUFFER_LEN;
size_t out_buf_len = MBEDTLS_SSL_OUT_BUFFER_LEN;
ssl->conf = conf;
@ -8980,18 +9093,25 @@ 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;
}
@ -9011,6 +9131,11 @@ 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;
@ -9038,6 +9163,13 @@ error:
static int ssl_session_reset_int( mbedtls_ssl_context *ssl, int partial )
{
int ret;
#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)
@ -9093,14 +9225,14 @@ static int ssl_session_reset_int( mbedtls_ssl_context *ssl, int partial )
ssl->session_in = NULL;
ssl->session_out = NULL;
mbedtls_platform_memset( ssl->out_buf, 0, MBEDTLS_SSL_OUT_BUFFER_LEN );
mbedtls_platform_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;
mbedtls_platform_memset( ssl->in_buf, 0, MBEDTLS_SSL_IN_BUFFER_LEN );
mbedtls_platform_memset( ssl->in_buf, 0, in_buf_len );
}
#if defined(MBEDTLS_SSL_HW_RECORD_ACCEL)
@ -10167,7 +10299,42 @@ int mbedtls_ssl_get_record_expansion( const mbedtls_ssl_context *ssl )
}
#if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH)
size_t mbedtls_ssl_get_max_frag_len( const mbedtls_ssl_context *ssl )
size_t mbedtls_ssl_get_input_max_frag_len( const mbedtls_ssl_context *ssl )
{
size_t max_len = MBEDTLS_SSL_MAX_CONTENT_LEN;
size_t read_mfl;
/* Use the configured MFL for the client if we're past SERVER_HELLO_DONE */
if( ssl->conf->endpoint == MBEDTLS_SSL_IS_CLIENT &&
ssl->state >= MBEDTLS_SSL_SERVER_HELLO_DONE )
{
return ssl_mfl_code_to_length( ssl->conf->mfl_code );
}
/* Check if a smaller max length was negotiated */
if( ssl->session_out != NULL )
{
read_mfl = ssl_mfl_code_to_length( ssl->session_out->mfl_code );
if( read_mfl < max_len )
{
max_len = read_mfl;
}
}
// During a handshake, use the value being negotiated
if( ssl->session_negotiate != NULL )
{
read_mfl = ssl_mfl_code_to_length( ssl->session_negotiate->mfl_code );
if( read_mfl < max_len )
{
max_len = read_mfl;
}
}
return( max_len );
}
size_t mbedtls_ssl_get_output_max_frag_len( const mbedtls_ssl_context *ssl )
{
size_t max_len;
@ -10192,6 +10359,13 @@ size_t mbedtls_ssl_get_max_frag_len( const mbedtls_ssl_context *ssl )
return( max_len );
}
#if !defined(MBEDTLS_DEPRECATED_REMOVED)
size_t mbedtls_ssl_get_max_frag_len( const mbedtls_ssl_context *ssl )
{
return mbedtls_ssl_get_output_max_frag_len( ssl );
}
#endif /* !MBEDTLS_DEPRECATED_REMOVED */
#endif /* MBEDTLS_SSL_MAX_FRAGMENT_LENGTH */
#if defined(MBEDTLS_SSL_PROTO_DTLS)
@ -10224,7 +10398,7 @@ int mbedtls_ssl_get_max_out_record_payload( const mbedtls_ssl_context *ssl )
#endif
#if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH)
const size_t mfl = mbedtls_ssl_get_max_frag_len( ssl );
const size_t mfl = mbedtls_ssl_get_output_max_frag_len( ssl );
if( max_len > mfl )
max_len = mfl;
@ -11880,6 +12054,71 @@ 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, len_offset_in = 0;
size_t written_out = 0, iv_offset_out = 0, len_offset_out = 0;
if( ssl->in_buf != NULL )
{
written_in = ssl->in_msg - ssl->in_buf;
len_offset_in = ssl->in_len - ssl->in_buf;
if( ssl->in_buf_len > buf_len && ssl->in_left < buf_len )
{
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 )
{
written_out = ssl->out_msg - ssl->out_buf;
iv_offset_out = ssl->out_iv - ssl->out_buf;
len_offset_out = ssl->out_len - ssl->out_buf;
if( ssl->out_buf_len > mbedtls_ssl_get_output_buflen( ssl ) &&
ssl->out_left < buf_len )
{
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. */
ssl_reset_in_out_pointers( ssl );
/* Fields below might not be properly updated with record
* splitting or with CID, so they are manually updated here. */
ssl->out_msg = ssl->out_buf + written_out;
ssl->out_len = ssl->out_buf + len_offset_out;
ssl->out_iv = ssl->out_buf + iv_offset_out;
ssl->in_msg = ssl->in_buf + written_in;
ssl->in_len = ssl->in_buf + len_offset_in;
}
}
#endif
}
void mbedtls_ssl_session_free( mbedtls_ssl_session *session )
@ -12495,13 +12734,23 @@ void mbedtls_ssl_free( mbedtls_ssl_context *ssl )
if( ssl->out_buf != NULL )
{
mbedtls_platform_zeroize( ssl->out_buf, MBEDTLS_SSL_OUT_BUFFER_LEN );
#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_platform_zeroize( ssl->out_buf, out_buf_len );
mbedtls_free( ssl->out_buf );
}
if( ssl->in_buf != NULL )
{
mbedtls_platform_zeroize( ssl->in_buf, MBEDTLS_SSL_IN_BUFFER_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_platform_zeroize( ssl->in_buf, in_buf_len );
mbedtls_free( ssl->in_buf );
}

3
library/version_features.c
View File

@ -555,6 +555,9 @@ static const char *features[] = {
#if defined(MBEDTLS_SSL_TRUNCATED_HMAC_COMPAT)
"MBEDTLS_SSL_TRUNCATED_HMAC_COMPAT",
#endif /* MBEDTLS_SSL_TRUNCATED_HMAC_COMPAT */
#if defined(MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH)
"MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH",
#endif /* MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH */
#if defined(MBEDTLS_THREADING_ALT)
"MBEDTLS_THREADING_ALT",
#endif /* MBEDTLS_THREADING_ALT */

8
programs/ssl/query_config.c
View File

@ -1522,6 +1522,14 @@ int query_config( const char *config )
}
#endif /* MBEDTLS_SSL_TRUNCATED_HMAC_COMPAT */
#if defined(MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH)
if( strcmp( "MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH", config ) == 0 )
{
MACRO_EXPANSION_TO_STR( MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH );
return( 0 );
}
#endif /* MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH */
#if defined(MBEDTLS_THREADING_ALT)
if( strcmp( "MBEDTLS_THREADING_ALT", config ) == 0 )
{

6
programs/ssl/ssl_client2.c
View File

@ -2332,8 +2332,10 @@ int main( int argc, char *argv[] )
mbedtls_printf( " [ Record expansion is unknown (compression) ]\n" );
#if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH)
mbedtls_printf( " [ Maximum fragment length is %u ]\n",
(unsigned int) mbedtls_ssl_get_max_frag_len( ssl ) );
mbedtls_printf( " [ Maximum input fragment length is %u ]\n",
(unsigned int) mbedtls_ssl_get_input_max_frag_len( ssl ) );
mbedtls_printf( " [ Maximum output fragment length is %u ]\n",
(unsigned int) mbedtls_ssl_get_output_max_frag_len( ssl ) );
#endif
#if defined(MBEDTLS_SSL_ALPN)

18
programs/ssl/ssl_server2.c
View File

@ -2312,7 +2312,10 @@ int main( int argc, char *argv[] )
#if defined(MBEDTLS_MEMORY_BUFFER_ALLOC_C)
mbedtls_memory_buffer_alloc_init( alloc_buf, sizeof(alloc_buf) );
#endif
#if defined(MBEDTLS_MEMORY_DEBUG)
size_t current_heap_memory, peak_heap_memory, heap_blocks;
#endif /* MBEDTLS_MEMORY_DEBUG */
#endif /* MBEDTLS_MEMORY_BUFFER_ALLOC_C */
ssl = mbedtls_calloc( 1, sizeof( *ssl ) );
conf = mbedtls_calloc( 1, sizeof( *conf ) );
@ -3420,8 +3423,10 @@ handshake:
mbedtls_printf( " [ Record expansion is unknown (compression) ]\n" );
#if defined(MBEDTLS_SSL_MAX_FRAGMENT_LENGTH)
mbedtls_printf( " [ Maximum fragment length is %u ]\n",
(unsigned int) mbedtls_ssl_get_max_frag_len( ssl ) );
mbedtls_printf( " [ Maximum input fragment length is %u ]\n",
(unsigned int) mbedtls_ssl_get_input_max_frag_len( ssl ) );
mbedtls_printf( " [ Maximum output fragment length is %u ]\n",
(unsigned int) mbedtls_ssl_get_output_max_frag_len( ssl ) );
#endif
#if defined(MBEDTLS_SSL_ALPN)
@ -3486,6 +3491,13 @@ handshake:
}
#endif /* MBEDTLS_SSL_DTLS_CONNECTION_ID */
#if defined(MBEDTLS_MEMORY_DEBUG)
mbedtls_memory_buffer_alloc_cur_get( &current_heap_memory, &heap_blocks );
mbedtls_memory_buffer_alloc_max_get( &peak_heap_memory, &heap_blocks );
mbedtls_printf( "Heap memory usage after handshake: %lu bytes. Peak memory usage was %lu\n",
(unsigned long) current_heap_memory, (unsigned long) peak_heap_memory );
#endif /* MBEDTLS_MEMORY_DEBUG */
if( opt.exchanges == 0 )
goto close_notify;

69
tests/scripts/all.sh
View File

@ -1276,6 +1276,75 @@ component_test_no_max_fragment_length_small_ssl_out_content_len () {
if_build_succeeded tests/ssl-opt.sh -f "Max fragment length\|Large buffer"
}
component_test_variable_ssl_in_out_buffer_len () {
msg "build: MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH enabled (ASan build)"
scripts/config.pl set MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH
CC=gcc cmake -D CMAKE_BUILD_TYPE:String=Asan .
make
msg "test: MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH enabled"
make test
msg "test: ssl-opt.sh, MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH enabled"
if_build_succeeded tests/ssl-opt.sh
msg "test: compat.sh, MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH enabled"
if_build_succeeded tests/compat.sh
}
component_test_variable_ssl_in_out_buffer_len_CID () {
msg "build: MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH and MBEDTLS_SSL_DTLS_CONNECTION_ID enabled (ASan build)"
scripts/config.pl set MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH
scripts/config.pl set MBEDTLS_SSL_DTLS_CONNECTION_ID
CC=gcc cmake -D CMAKE_BUILD_TYPE:String=Asan .
make
msg "test: MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH and MBEDTLS_SSL_DTLS_CONNECTION_ID"
make test
msg "test: ssl-opt.sh, MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH and MBEDTLS_SSL_DTLS_CONNECTION_ID enabled"
if_build_succeeded tests/ssl-opt.sh
msg "test: compat.sh, MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH and MBEDTLS_SSL_DTLS_CONNECTION_ID enabled"
if_build_succeeded tests/compat.sh
}
component_test_variable_ssl_in_out_buffer_len_record_splitting () {
msg "build: MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH and MBEDTLS_SSL_CBC_RECORD_SPLITTING enabled (ASan build)"
scripts/config.pl set MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH
scripts/config.pl set MBEDTLS_SSL_CBC_RECORD_SPLITTING
CC=gcc cmake -D CMAKE_BUILD_TYPE:String=Asan .
make
msg "test: MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH and MBEDTLS_SSL_CBC_RECORD_SPLITTING"
make test
msg "test: ssl-opt.sh, MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH and MBEDTLS_SSL_CBC_RECORD_SPLITTING enabled"
if_build_succeeded tests/ssl-opt.sh
msg "test: compat.sh, MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH and MBEDTLS_SSL_CBC_RECORD_SPLITTING enabled"
if_build_succeeded tests/compat.sh
}
component_test_ssl_alloc_buffer_and_mfl () {
msg "build: default config with memory buffer allocator and MFL extension"
scripts/config.pl set MBEDTLS_MEMORY_BUFFER_ALLOC_C
scripts/config.pl set MBEDTLS_PLATFORM_MEMORY
scripts/config.pl set MBEDTLS_MEMORY_DEBUG
scripts/config.pl set MBEDTLS_SSL_MAX_FRAGMENT_LENGTH
scripts/config.pl set MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH
CC=gcc cmake .
make
msg "test: MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH, MBEDTLS_MEMORY_BUFFER_ALLOC_C, MBEDTLS_MEMORY_DEBUG and MBEDTLS_SSL_MAX_FRAGMENT_LENGTH"
make test
msg "test: MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH, MBEDTLS_MEMORY_BUFFER_ALLOC_C, MBEDTLS_MEMORY_DEBUG and MBEDTLS_SSL_MAX_FRAGMENT_LENGTH"
if_build_succeeded tests/ssl-opt.sh -f "Handshake memory usage"
}
component_test_when_no_ciphersuites_have_mac () {
msg "build: when no ciphersuites have MAC"
scripts/config.pl unset MBEDTLS_CIPHER_NULL_CIPHER

391
tests/ssl-opt.sh
View File

@ -153,7 +153,7 @@ skip_next_test() {
}
requires_ciphersuite_enabled() {
if [ -z "$($P_CLI --help | grep "$1")" ]; then
if [ -z "$($P_CLI --help 2>/dev/null | grep $1)" ]; then
SKIP_NEXT="YES"
fi
}
@ -510,6 +510,45 @@ check_server_hello_time() {
fi
}
# Get handshake memory usage from server or client output and put it into the variable specified by the first argument
handshake_memory_get() {
OUTPUT_VARIABLE="$1"
OUTPUT_FILE="$2"
# Get memory usage from a pattern like "Heap memory usage after handshake: 23112 bytes. Peak memory usage was 33112"
MEM_USAGE=$(sed -n 's/.*Heap memory usage after handshake: //p' < "$OUTPUT_FILE" | grep -o "[0-9]*" | head -1)
# Check if memory usage was read
if [ -z "$MEM_USAGE" ]; then
echo "Error: Can not read the value of handshake memory usage"
return 1
else
eval "$OUTPUT_VARIABLE=$MEM_USAGE"
return 0
fi
}
# Get handshake memory usage from server or client output and check if this value
# is not higher than the maximum given by the first argument
handshake_memory_check() {
MAX_MEMORY="$1"
OUTPUT_FILE="$2"
# Get memory usage
if ! handshake_memory_get "MEMORY_USAGE" "$OUTPUT_FILE"; then
return 1
fi
# Check if memory usage is below max value
if [ "$MEMORY_USAGE" -gt "$MAX_MEMORY" ]; then
echo "\nFailed: Handshake memory usage was $MEMORY_USAGE bytes," \
"but should be below $MAX_MEMORY bytes"
return 1
else
return 0
fi
}
# wait for client to terminate and set CLI_EXIT
# must be called right after starting the client
wait_client_done() {
@ -999,6 +1038,58 @@ run_test() {
rm -f $SRV_OUT $CLI_OUT $PXY_OUT
}
# Test that the server's memory usage after a handshake is reduced when a client specifies
# a maximum fragment length.
# first argument ($1) is MFL for SSL client
# second argument ($2) is memory usage for SSL client with default MFL (16k)
run_test_memory_after_hanshake_with_mfl()
{
# The test passes if the difference is around 2*(16k-MFL)
local MEMORY_USAGE_LIMIT="$(( $2 - ( 2 * ( 16384 - $1 )) ))"
# Leave some margin for robustness
MEMORY_USAGE_LIMIT="$(( ( MEMORY_USAGE_LIMIT * 110 ) / 100 ))"
run_test "Handshake memory usage (MFL $1)" \
"$P_SRV debug_level=3 auth_mode=required force_version=tls1_2" \
"$P_CLI debug_level=3 force_version=tls1_2 \
crt_file=data_files/server5.crt key_file=data_files/server5.key \
force_ciphersuite=TLS-ECDHE-ECDSA-WITH-AES-128-CCM max_frag_len=$1" \
0 \
-F "handshake_memory_check $MEMORY_USAGE_LIMIT"
}
# Test that the server's memory usage after a handshake is reduced when a client specifies
# different values of Maximum Fragment Length: default (16k), 4k, 2k, 1k and 512 bytes
run_tests_memory_after_hanshake()
{
# all tests in this sequence requires the same configuration (see requires_config_enabled())
SKIP_THIS_TESTS="$SKIP_NEXT"
# first test with default MFU is to get reference memory usage
MEMORY_USAGE_MFL_16K=0
run_test "Handshake memory usage initial (MFL 16384 - default)" \
"$P_SRV debug_level=3 auth_mode=required force_version=tls1_2" \
"$P_CLI debug_level=3 force_version=tls1_2 \
crt_file=data_files/server5.crt key_file=data_files/server5.key \
force_ciphersuite=TLS-ECDHE-ECDSA-WITH-AES-128-CCM" \
0 \
-F "handshake_memory_get MEMORY_USAGE_MFL_16K"
SKIP_NEXT="$SKIP_THIS_TESTS"
run_test_memory_after_hanshake_with_mfl 4096 "$MEMORY_USAGE_MFL_16K"
SKIP_NEXT="$SKIP_THIS_TESTS"
run_test_memory_after_hanshake_with_mfl 2048 "$MEMORY_USAGE_MFL_16K"
SKIP_NEXT="$SKIP_THIS_TESTS"
run_test_memory_after_hanshake_with_mfl 1024 "$MEMORY_USAGE_MFL_16K"
SKIP_NEXT="$SKIP_THIS_TESTS"
run_test_memory_after_hanshake_with_mfl 512 "$MEMORY_USAGE_MFL_16K"
}
cleanup() {
rm -f $CLI_OUT $SRV_OUT $PXY_OUT $SESSION
test -n "${SRV_PID:-}" && kill $SRV_PID >/dev/null 2>&1
@ -2176,6 +2267,32 @@ run_test "Connection ID, 3D: Cli+Srv enabled, Srv disables on renegotiation"
-c "ignoring unexpected CID" \
-s "ignoring unexpected CID"
requires_config_enabled MBEDTLS_SSL_DTLS_CONNECTION_ID
requires_config_enabled MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH
run_test "Connection ID: Cli+Srv enabled, variable buffer lengths, MFL=512" \
"$P_SRV dtls=1 cid=1 cid_val=dead debug_level=2" \
"$P_CLI force_ciphersuite="TLS-ECDHE-ECDSA-WITH-AES-128-CCM-8" max_frag_len=512 dtls=1 cid=1 cid_val=beef" \
0 \
-c "(initial handshake) Peer CID (length 2 Bytes): de ad" \
-s "(initial handshake) Peer CID (length 2 Bytes): be ef" \
-s "(initial handshake) Use of Connection ID has been negotiated" \
-c "(initial handshake) Use of Connection ID has been negotiated" \
-s "Reallocating in_buf" \
-s "Reallocating out_buf"
requires_config_enabled MBEDTLS_SSL_DTLS_CONNECTION_ID
requires_config_enabled MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH
run_test "Connection ID: Cli+Srv enabled, variable buffer lengths, MFL=1024" \
"$P_SRV dtls=1 cid=1 cid_val=dead debug_level=2" \
"$P_CLI force_ciphersuite="TLS-ECDHE-ECDSA-WITH-AES-128-CCM-8" max_frag_len=1024 dtls=1 cid=1 cid_val=beef" \
0 \
-c "(initial handshake) Peer CID (length 2 Bytes): de ad" \
-s "(initial handshake) Peer CID (length 2 Bytes): be ef" \
-s "(initial handshake) Use of Connection ID has been negotiated" \
-c "(initial handshake) Use of Connection ID has been negotiated" \
-s "Reallocating in_buf" \
-s "Reallocating out_buf"
# Tests for Encrypt-then-MAC extension
run_test "Encrypt then MAC: default" \
@ -3047,14 +3164,15 @@ run_test "Session resume using cache, DTLS: openssl server" \
if [ $MAX_CONTENT_LEN -ne 16384 ]; then
printf "Using non-default maximum content length $MAX_CONTENT_LEN\n"
fi
requires_config_enabled MBEDTLS_SSL_MAX_FRAGMENT_LENGTH
run_test "Max fragment length: enabled, default" \
"$P_SRV debug_level=3" \
"$P_CLI debug_level=3" \
0 \
-c "Maximum fragment length is $MAX_CONTENT_LEN" \
-s "Maximum fragment length is $MAX_CONTENT_LEN" \
-c "Maximum input fragment length is $MAX_CONTENT_LEN" \
-c "Maximum output fragment length is $MAX_CONTENT_LEN" \
-s "Maximum input fragment length is $MAX_CONTENT_LEN" \
-s "Maximum output fragment length is $MAX_CONTENT_LEN" \
-C "client hello, adding max_fragment_length extension" \
-S "found max fragment length extension" \
-S "server hello, max_fragment_length extension" \
@ -3065,8 +3183,10 @@ run_test "Max fragment length: enabled, default, larger message" \
"$P_SRV debug_level=3" \
"$P_CLI debug_level=3 request_size=$(( $MAX_CONTENT_LEN + 1))" \
0 \
-c "Maximum fragment length is $MAX_CONTENT_LEN" \
-s "Maximum fragment length is $MAX_CONTENT_LEN" \
-c "Maximum input fragment length is $MAX_CONTENT_LEN" \
-c "Maximum output fragment length is $MAX_CONTENT_LEN" \
-s "Maximum input fragment length is $MAX_CONTENT_LEN" \
-s "Maximum output fragment length is $MAX_CONTENT_LEN" \
-C "client hello, adding max_fragment_length extension" \
-S "found max fragment length extension" \
-S "server hello, max_fragment_length extension" \
@ -3076,13 +3196,14 @@ run_test "Max fragment length: enabled, default, larger message" \
-s "1 bytes read"
requires_config_enabled MBEDTLS_SSL_MAX_FRAGMENT_LENGTH
requires_config_value_at_least "MBEDTLS_SSL_MAX_CONTENT_LEN" 4096
run_test "Max fragment length, DTLS: enabled, default, larger message" \
"$P_SRV debug_level=3 dtls=1" \
"$P_CLI debug_level=3 dtls=1 request_size=$(( $MAX_CONTENT_LEN + 1))" \
1 \
-c "Maximum fragment length is $MAX_CONTENT_LEN" \
-s "Maximum fragment length is $MAX_CONTENT_LEN" \
-c "Maximum input fragment length is $MAX_CONTENT_LEN" \
-c "Maximum output fragment length is $MAX_CONTENT_LEN" \
-s "Maximum input fragment length is $MAX_CONTENT_LEN" \
-s "Maximum output fragment length is $MAX_CONTENT_LEN" \
-C "client hello, adding max_fragment_length extension" \
-S "found max fragment length extension" \
-S "server hello, max_fragment_length extension" \
@ -3094,72 +3215,245 @@ run_test "Max fragment length, DTLS: enabled, default, larger message" \
# content length configuration.)
requires_config_disabled MBEDTLS_SSL_MAX_FRAGMENT_LENGTH
requires_config_value_at_least "MBEDTLS_SSL_MAX_CONTENT_LEN" 16384
run_test "Max fragment length: disabled, larger message" \
"$P_SRV debug_level=3" \
"$P_CLI debug_level=3 request_size=$(( $MAX_CONTENT_LEN + 1))" \
0 \
-C "Maximum fragment length is 16384" \
-S "Maximum fragment length is 16384" \
-C "Maximum input fragment length is 16384" \
-C "Maximum output fragment length is 16384" \
-S "Maximum input fragment length is 16384" \
-S "Maximum output fragment length is 16384" \
-c "$(( $MAX_CONTENT_LEN + 1)) bytes written in 2 fragments" \
-s "$MAX_CONTENT_LEN bytes read" \
-s "1 bytes read"
requires_config_disabled MBEDTLS_SSL_MAX_FRAGMENT_LENGTH
requires_config_value_at_least "MBEDTLS_SSL_MAX_CONTENT_LEN" 16384
run_test "Max fragment length DTLS: disabled, larger message" \
"$P_SRV debug_level=3 dtls=1" \
"$P_CLI debug_level=3 dtls=1 request_size=$(( $MAX_CONTENT_LEN + 1))" \
1 \
-C "Maximum fragment length is 16384" \
-S "Maximum fragment length is 16384" \
-C "Maximum input fragment length is 16384" \
-C "Maximum output fragment length is 16384" \
-S "Maximum input fragment length is 16384" \
-S "Maximum output fragment length is 16384" \
-c "fragment larger than.*maximum "
requires_config_enabled MBEDTLS_SSL_MAX_FRAGMENT_LENGTH
requires_config_value_at_least "MBEDTLS_SSL_MAX_CONTENT_LEN" 4096
run_test "Max fragment length: used by client" \
"$P_SRV debug_level=3" \
"$P_CLI debug_level=3 max_frag_len=4096" \
0 \
-c "Maximum fragment length is 4096" \
-s "Maximum fragment length is 4096" \
-c "Maximum input fragment length is 4096" \
-c "Maximum output fragment length is 4096" \
-s "Maximum input fragment length is 4096" \
-s "Maximum output fragment length is 4096" \
-c "client hello, adding max_fragment_length extension" \
-s "found max fragment length extension" \
-s "server hello, max_fragment_length extension" \
-c "found max_fragment_length extension"
requires_config_enabled MBEDTLS_SSL_MAX_FRAGMENT_LENGTH
run_test "Max fragment length: client 512, server 1024" \
"$P_SRV debug_level=3 max_frag_len=1024" \
"$P_CLI debug_level=3 max_frag_len=512" \
0 \
-c "Maximum input fragment length is 512" \
-c "Maximum output fragment length is 512" \
-s "Maximum input fragment length is 512" \
-s "Maximum output fragment length is 512" \
-c "client hello, adding max_fragment_length extension" \
-s "found max fragment length extension" \
-s "server hello, max_fragment_length extension" \
-c "found max_fragment_length extension"
requires_config_enabled MBEDTLS_SSL_MAX_FRAGMENT_LENGTH
run_test "Max fragment length: client 512, server 2048" \
"$P_SRV debug_level=3 max_frag_len=2048" \
"$P_CLI debug_level=3 max_frag_len=512" \
0 \
-c "Maximum input fragment length is 512" \
-c "Maximum output fragment length is 512" \
-s "Maximum input fragment length is 512" \
-s "Maximum output fragment length is 512" \
-c "client hello, adding max_fragment_length extension" \
-s "found max fragment length extension" \
-s "server hello, max_fragment_length extension" \
-c "found max_fragment_length extension"
requires_config_enabled MBEDTLS_SSL_MAX_FRAGMENT_LENGTH
run_test "Max fragment length: client 512, server 4096" \
"$P_SRV debug_level=3 max_frag_len=4096" \
"$P_CLI debug_level=3 max_frag_len=512" \
0 \
-c "Maximum input fragment length is 512" \
-c "Maximum output fragment length is 512" \
-s "Maximum input fragment length is 512" \
-s "Maximum output fragment length is 512" \
-c "client hello, adding max_fragment_length extension" \
-s "found max fragment length extension" \
-s "server hello, max_fragment_length extension" \
-c "found max_fragment_length extension"
requires_config_enabled MBEDTLS_SSL_MAX_FRAGMENT_LENGTH
run_test "Max fragment length: client 1024, server 512" \
"$P_SRV debug_level=3 max_frag_len=512" \
"$P_CLI debug_level=3 max_frag_len=1024" \
0 \
-c "Maximum input fragment length is 1024" \
-c "Maximum output fragment length is 1024" \
-s "Maximum input fragment length is 1024" \
-s "Maximum output fragment length is 512" \
-c "client hello, adding max_fragment_length extension" \
-s "found max fragment length extension" \
-s "server hello, max_fragment_length extension" \
-c "found max_fragment_length extension"
requires_config_enabled MBEDTLS_SSL_MAX_FRAGMENT_LENGTH
run_test "Max fragment length: client 1024, server 2048" \
"$P_SRV debug_level=3 max_frag_len=2048" \
"$P_CLI debug_level=3 max_frag_len=1024" \
0 \
-c "Maximum input fragment length is 1024" \
-c "Maximum output fragment length is 1024" \
-s "Maximum input fragment length is 1024" \
-s "Maximum output fragment length is 1024" \
-c "client hello, adding max_fragment_length extension" \
-s "found max fragment length extension" \
-s "server hello, max_fragment_length extension" \
-c "found max_fragment_length extension"
requires_config_enabled MBEDTLS_SSL_MAX_FRAGMENT_LENGTH
run_test "Max fragment length: client 1024, server 4096" \
"$P_SRV debug_level=3 max_frag_len=4096" \
"$P_CLI debug_level=3 max_frag_len=1024" \
0 \
-c "Maximum input fragment length is 1024" \
-c "Maximum output fragment length is 1024" \
-s "Maximum input fragment length is 1024" \
-s "Maximum output fragment length is 1024" \
-c "client hello, adding max_fragment_length extension" \
-s "found max fragment length extension" \
-s "server hello, max_fragment_length extension" \
-c "found max_fragment_length extension"
requires_config_enabled MBEDTLS_SSL_MAX_FRAGMENT_LENGTH
run_test "Max fragment length: client 2048, server 512" \
"$P_SRV debug_level=3 max_frag_len=512" \
"$P_CLI debug_level=3 max_frag_len=2048" \
0 \
-c "Maximum input fragment length is 2048" \
-c "Maximum output fragment length is 2048" \
-s "Maximum input fragment length is 2048" \
-s "Maximum output fragment length is 512" \
-c "client hello, adding max_fragment_length extension" \
-s "found max fragment length extension" \
-s "server hello, max_fragment_length extension" \
-c "found max_fragment_length extension"
requires_config_enabled MBEDTLS_SSL_MAX_FRAGMENT_LENGTH
run_test "Max fragment length: client 2048, server 1024" \
"$P_SRV debug_level=3 max_frag_len=1024" \
"$P_CLI debug_level=3 max_frag_len=2048" \
0 \
-c "Maximum input fragment length is 2048" \
-c "Maximum output fragment length is 2048" \
-s "Maximum input fragment length is 2048" \
-s "Maximum output fragment length is 1024" \
-c "client hello, adding max_fragment_length extension" \
-s "found max fragment length extension" \
-s "server hello, max_fragment_length extension" \
-c "found max_fragment_length extension"
requires_config_enabled MBEDTLS_SSL_MAX_FRAGMENT_LENGTH
run_test "Max fragment length: client 2048, server 4096" \
"$P_SRV debug_level=3 max_frag_len=4096" \
"$P_CLI debug_level=3 max_frag_len=2048" \
0 \
-c "Maximum input fragment length is 2048" \
-c "Maximum output fragment length is 2048" \
-s "Maximum input fragment length is 2048" \
-s "Maximum output fragment length is 2048" \
-c "client hello, adding max_fragment_length extension" \
-s "found max fragment length extension" \
-s "server hello, max_fragment_length extension" \
-c "found max_fragment_length extension"
requires_config_enabled MBEDTLS_SSL_MAX_FRAGMENT_LENGTH
run_test "Max fragment length: client 4096, server 512" \
"$P_SRV debug_level=3 max_frag_len=512" \
"$P_CLI debug_level=3 max_frag_len=4096" \
0 \
-c "Maximum input fragment length is 4096" \
-c "Maximum output fragment length is 4096" \
-s "Maximum input fragment length is 4096" \
-s "Maximum output fragment length is 512" \
-c "client hello, adding max_fragment_length extension" \
-s "found max fragment length extension" \
-s "server hello, max_fragment_length extension" \
-c "found max_fragment_length extension"
requires_config_enabled MBEDTLS_SSL_MAX_FRAGMENT_LENGTH
run_test "Max fragment length: client 4096, server 1024" \
"$P_SRV debug_level=3 max_frag_len=1024" \
"$P_CLI debug_level=3 max_frag_len=4096" \
0 \
-c "Maximum input fragment length is 4096" \
-c "Maximum output fragment length is 4096" \
-s "Maximum input fragment length is 4096" \
-s "Maximum output fragment length is 1024" \
-c "client hello, adding max_fragment_length extension" \
-s "found max fragment length extension" \
-s "server hello, max_fragment_length extension" \
-c "found max_fragment_length extension"
requires_config_enabled MBEDTLS_SSL_MAX_FRAGMENT_LENGTH
run_test "Max fragment length: client 4096, server 2048" \
"$P_SRV debug_level=3 max_frag_len=2048" \
"$P_CLI debug_level=3 max_frag_len=4096" \
0 \
-c "Maximum input fragment length is 4096" \
-c "Maximum output fragment length is 4096" \
-s "Maximum input fragment length is 4096" \
-s "Maximum output fragment length is 2048" \
-c "client hello, adding max_fragment_length extension" \
-s "found max fragment length extension" \
-s "server hello, max_fragment_length extension" \
-c "found max_fragment_length extension"
requires_config_enabled MBEDTLS_SSL_MAX_FRAGMENT_LENGTH
requires_config_value_at_least "MBEDTLS_SSL_MAX_CONTENT_LEN" 4096
run_test "Max fragment length: used by server" \
"$P_SRV debug_level=3 max_frag_len=4096" \
"$P_CLI debug_level=3" \
0 \
-c "Maximum fragment length is $MAX_CONTENT_LEN" \
-s "Maximum fragment length is 4096" \
-c "Maximum input fragment length is $MAX_CONTENT_LEN" \
-c "Maximum output fragment length is $MAX_CONTENT_LEN" \
-s "Maximum input fragment length is $MAX_CONTENT_LEN" \
-s "Maximum output fragment length is 4096" \
-C "client hello, adding max_fragment_length extension" \
-S "found max fragment length extension" \
-S "server hello, max_fragment_length extension" \
-C "found max_fragment_length extension"
requires_config_enabled MBEDTLS_SSL_MAX_FRAGMENT_LENGTH
requires_config_value_at_least "MBEDTLS_SSL_MAX_CONTENT_LEN" 4096
requires_gnutls
run_test "Max fragment length: gnutls server" \
"$G_SRV" \
"$P_CLI debug_level=3 max_frag_len=4096 ca_file=data_files/test-ca2.crt" \
"$P_CLI debug_level=3 max_frag_len=4096" \
0 \
-c "Maximum fragment length is 4096" \
-c "Maximum input fragment length is 4096" \
-c "Maximum output fragment length is 4096" \
-c "client hello, adding max_fragment_length extension" \
-c "found max_fragment_length extension"
requires_config_enabled MBEDTLS_SSL_MAX_FRAGMENT_LENGTH
requires_config_value_at_least "MBEDTLS_SSL_MAX_CONTENT_LEN" 2048
run_test "Max fragment length: client, message just fits" \
"$P_SRV debug_level=3" \
"$P_CLI debug_level=3 max_frag_len=2048 request_size=2048" \
0 \
-c "Maximum fragment length is 2048" \
-s "Maximum fragment length is 2048" \
-c "Maximum input fragment length is 2048" \
-c "Maximum output fragment length is 2048" \
-s "Maximum input fragment length is 2048" \
-s "Maximum output fragment length is 2048" \
-c "client hello, adding max_fragment_length extension" \
-s "found max fragment length extension" \
-s "server hello, max_fragment_length extension" \
@ -3168,13 +3462,14 @@ run_test "Max fragment length: client, message just fits" \
-s "2048 bytes read"
requires_config_enabled MBEDTLS_SSL_MAX_FRAGMENT_LENGTH
requires_config_value_at_least "MBEDTLS_SSL_MAX_CONTENT_LEN" 2048
run_test "Max fragment length: client, larger message" \
"$P_SRV debug_level=3" \
"$P_CLI debug_level=3 max_frag_len=2048 request_size=2345" \
0 \
-c "Maximum fragment length is 2048" \
-s "Maximum fragment length is 2048" \
-c "Maximum input fragment length is 2048" \
-c "Maximum output fragment length is 2048" \
-s "Maximum input fragment length is 2048" \
-s "Maximum output fragment length is 2048" \
-c "client hello, adding max_fragment_length extension" \
-s "found max fragment length extension" \
-s "server hello, max_fragment_length extension" \
@ -3184,13 +3479,14 @@ run_test "Max fragment length: client, larger message" \
-s "297 bytes read"
requires_config_enabled MBEDTLS_SSL_MAX_FRAGMENT_LENGTH
requires_config_value_at_least "MBEDTLS_SSL_MAX_CONTENT_LEN" 2048
run_test "Max fragment length: DTLS client, larger message" \
"$P_SRV debug_level=3 dtls=1" \
"$P_CLI debug_level=3 dtls=1 max_frag_len=2048 request_size=2345" \
1 \
-c "Maximum fragment length is 2048" \
-s "Maximum fragment length is 2048" \
-c "Maximum input fragment length is 2048" \
-c "Maximum output fragment length is 2048" \
-s "Maximum input fragment length is 2048" \
-s "Maximum output fragment length is 2048" \
-c "client hello, adding max_fragment_length extension" \
-s "found max fragment length extension" \
-s "server hello, max_fragment_length extension" \
@ -3291,6 +3587,29 @@ run_test "Renegotiation: double" \
-s "=> renegotiate" \
-s "write hello request"
requires_config_enabled MBEDTLS_SSL_RENEGOTIATION
requires_config_enabled MBEDTLS_SSL_MAX_FRAGMENT_LENGTH
run_test "Renegotiation with max fragment length: client 2048, server 512" \
"$P_SRV debug_level=3 exchanges=2 renegotiation=1 auth_mode=optional renegotiate=1 max_frag_len=512" \
"$P_CLI debug_level=3 exchanges=2 renegotiation=1 renegotiate=1 max_frag_len=2048 force_ciphersuite=TLS-ECDHE-ECDSA-WITH-AES-128-CCM-8" \
0 \
-c "Maximum input fragment length is 2048" \
-c "Maximum output fragment length is 2048" \
-s "Maximum input fragment length is 2048" \
-s "Maximum output fragment length is 512" \
-c "client hello, adding max_fragment_length extension" \
-s "found max fragment length extension" \
-s "server hello, max_fragment_length extension" \
-c "found max_fragment_length extension" \
-c "client hello, adding renegotiation extension" \
-s "received TLS_EMPTY_RENEGOTIATION_INFO" \
-s "found renegotiation extension" \
-s "server hello, secure renegotiation extension" \
-c "found renegotiation extension" \
-c "=> renegotiate" \
-s "=> renegotiate" \
-s "write hello request"
requires_config_enabled MBEDTLS_SSL_RENEGOTIATION
run_test "Renegotiation: client-initiated, server-rejected" \
"$P_SRV debug_level=3 exchanges=2 renegotiation=0 auth_mode=optional" \
@ -8774,6 +9093,12 @@ run_test "DTLS proxy: 3d, gnutls server, fragmentation, nbio" \
-s "Extra-header:" \
-c "Extra-header:"
# Test heap memory usage after handshake
requires_config_enabled MBEDTLS_MEMORY_DEBUG
requires_config_enabled MBEDTLS_MEMORY_BUFFER_ALLOC_C
requires_config_enabled MBEDTLS_SSL_MAX_FRAGMENT_LENGTH
run_tests_memory_after_hanshake
# Final report
echo "------------------------------------------------------------------------"