Merge pull request #2938 from yanesca/iotssl-2954-custom-io-unit-test

Mock TCP sockets and callbacks for SSL unit tests
This commit is contained in:
Jaeden Amero 2019-12-10 09:49:59 +00:00 committed by GitHub
commit caf88ff8f5
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GPG key ID: 4AEE18F83AFDEB23
4 changed files with 874 additions and 5 deletions

View file

@ -230,13 +230,45 @@ typedef enum
#define TEST_VALID_PARAM( TEST ) \
TEST_ASSERT( ( TEST, 1 ) );
#define TEST_HELPER_ASSERT(a) if( !( a ) ) \
#define TEST_HELPER_ASSERT(a) if( !( a ) ) \
{ \
mbedtls_fprintf( stderr, "Assertion Failed at %s:%d - %s\n", \
mbedtls_fprintf( stderr, "Assertion Failed at %s:%d - %s\n", \
__FILE__, __LINE__, #a ); \
mbedtls_exit( 1 ); \
mbedtls_exit( 1 ); \
}
/** Allocate memory dynamically and fail the test case if this fails.
*
* You must set \p pointer to \c NULL before calling this macro and
* put `mbedtls_free( pointer )` in the test's cleanup code.
*
* If \p length is zero, the resulting \p pointer will be \c NULL.
* This is usually what we want in tests since API functions are
* supposed to accept null pointers when a buffer size is zero.
*
* This macro expands to an instruction, not an expression.
* It may jump to the \c exit label.
*
* \param pointer An lvalue where the address of the allocated buffer
* will be stored.
* This expression may be evaluated multiple times.
* \param length Number of elements to allocate.
* This expression may be evaluated multiple times.
*
*/
#define ASSERT_ALLOC( pointer, length ) \
do \
{ \
TEST_ASSERT( ( pointer ) == NULL ); \
if( ( length ) != 0 ) \
{ \
( pointer ) = mbedtls_calloc( sizeof( *( pointer ) ), \
( length ) ); \
TEST_ASSERT( ( pointer ) != NULL ); \
} \
} \
while( 0 )
/*
* 32-bit integer manipulation macros (big endian)
*/

View file

@ -75,7 +75,7 @@ uint8_t receive_byte()
c[1] = greentea_getc();
c[2] = '\0';
assert( unhexify( &byte, c ) != 2 );
TEST_HELPER_ASSERT( unhexify( &byte, c ) != 2 );
return( byte );
}
@ -100,7 +100,7 @@ uint32_t receive_uint32()
greentea_getc(),
'\0'
};
assert( unhexify( &value, c ) != 8 );
TEST_HELPER_ASSERT( unhexify( &value, c ) != 8 );
return( (uint32_t)value );
}

View file

@ -1,3 +1,69 @@
Test calback buffer sanity
test_callback_buffer_sanity:
Callback buffer test: Exercise simple write/read
test_callback_buffer:50:25:25:25:25:0:0:0:0
Callback buffer test: Filling up the buffer
test_callback_buffer:50:50:50:50:50:0:0:0:0
Callback buffer test: Filling up the buffer in two steps
test_callback_buffer:50:20:20:0:0:30:30:50:50
Callback buffer test: Reading out the buffer in two steps
test_callback_buffer:50:50:50:30:30:0:0:20:20
Callback buffer test: Data wraps in buffer
test_callback_buffer:50:45:45:10:10:10:10:45:45
Callback buffer test: Data starts at the end
test_callback_buffer:50:50:50:49:49:10:10:11:11
Callback buffer test: Can write less than requested
test_callback_buffer:50:75:50:30:30:25:25:45:45
Callback buffer test: Can read less than requested
test_callback_buffer:50:25:25:30:25:5:5:5:5
Callback buffer test: Writing to full buffer
test_callback_buffer:50:50:50:0:0:10:0:60:50
Callback buffer test: Reading from empty buffer
test_callback_buffer:50:0:0:10:0:0:0:0:0
Test mock socket sanity
ssl_mock_sanity:
Test mock blocking TCP connection
ssl_mock_tcp:1:0:0
Test mock non-blocking TCP connection: would not block
ssl_mock_tcp:0:0:0
Test mock non-blocking TCP connection: client would block
ssl_mock_tcp:0:0xB509:0
Test mock non-blocking TCP connection: server would block
ssl_mock_tcp:0:0x0FB1:0
Test mock non-blocking TCP connection: both peers would block
ssl_mock_tcp:0:0x1111:0xEEEE
Test mock blocking TCP connection (interleaving)
ssl_mock_tcp_interleaving:1:0:0
Test mock non-blocking TCP connection: would not block (interleaving)
ssl_mock_tcp_interleaving:0:0:0
Test mock non-blocking TCP connection: client would block (interleaving)
ssl_mock_tcp_interleaving:0:0xB509:0
Test mock non-blocking TCP connection: server would block (interleaving)
ssl_mock_tcp_interleaving:0:0x0FB1:0
Test mock non-blocking TCP connection: both peers would block (interleaving)
ssl_mock_tcp_interleaving:0:0x1111:0xEEEE
SSL DTLS replay: initial state, seqnum 0
ssl_dtls_replay:"":"000000000000":0

View file

@ -2,6 +2,343 @@
#include <mbedtls/ssl.h>
#include <mbedtls/ssl_internal.h>
/*
* Buffer structure for custom I/O callbacks.
*/
typedef struct mbedtls_test_buffer
{
size_t start;
size_t content_length;
size_t capacity;
unsigned char *buffer;
} mbedtls_test_buffer;
/*
* Initialises \p buf. After calling this function it is safe to call
* `mbedtls_test_buffer_free()` on \p buf.
*/
void mbedtls_test_buffer_init( mbedtls_test_buffer *buf )
{
memset( buf, 0, sizeof( *buf ) );
}
/*
* Sets up \p buf. After calling this function it is safe to call
* `mbedtls_test_buffer_put()` and `mbedtls_test_buffer_get()` on \p buf.
*/
int mbedtls_test_buffer_setup( mbedtls_test_buffer *buf, size_t capacity )
{
buf->buffer = (unsigned char*) mbedtls_calloc( capacity,
sizeof(unsigned char) );
if( NULL == buf->buffer )
return MBEDTLS_ERR_SSL_ALLOC_FAILED;
buf->capacity = capacity;
return 0;
}
void mbedtls_test_buffer_free( mbedtls_test_buffer *buf )
{
if( buf->buffer != NULL )
mbedtls_free( buf->buffer );
memset( buf, 0, sizeof( *buf ) );
}
/*
* Puts \p input_len bytes from the \p input buffer into the ring buffer \p buf.
*
* \p buf must have been initialized and set up by calling
* `mbedtls_test_buffer_init()` and `mbedtls_test_buffer_setup()`.
*
* \retval \p input_len, if the data fits.
* \retval 0 <= value < \p input_len, if the data does not fit.
* \retval -1, if \p buf is NULL, it hasn't been set up or \p input_len is not
* zero and \p input is NULL.
*/
int mbedtls_test_buffer_put( mbedtls_test_buffer *buf,
const unsigned char* input, size_t input_len )
{
size_t overflow = 0;
if( ( buf == NULL ) || ( buf->buffer == NULL ) )
return -1;
/* Reduce input_len to a number that fits in the buffer. */
if ( ( buf->content_length + input_len ) > buf->capacity )
{
input_len = buf->capacity - buf->content_length;
}
if( input == NULL )
{
return ( input_len == 0 ) ? 0 : -1;
}
/* Calculate the number of bytes that need to be placed at lower memory
* address */
if( buf->start + buf->content_length + input_len
> buf->capacity )
{
overflow = ( buf->start + buf->content_length + input_len )
% buf->capacity;
}
memcpy( buf->buffer + buf->start + buf->content_length, input,
input_len - overflow );
memcpy( buf->buffer, input + input_len - overflow, overflow );
buf->content_length += input_len;
return input_len;
}
/*
* Gets \p output_len bytes from the \p output buffer into the ring buffer
* \p buf.
*
* \p buf must have been initialized and set up by calling
* `mbedtls_test_buffer_init()` and `mbedtls_test_buffer_setup()`.
*
* \retval \p output_len, if the data is available.
* \retval 0 <= value < \p output_len, if the data is not available.
* \retval -1, if \buf is NULL, it hasn't been set up or \p output_len is not
* zero and \p output is NULL
*/
int mbedtls_test_buffer_get( mbedtls_test_buffer *buf,
unsigned char* output, size_t output_len )
{
size_t overflow = 0;
if( ( buf == NULL ) || ( buf->buffer == NULL ) )
return -1;
if( output == NULL )
{
return ( output_len == 0 ) ? 0 : -1;
}
if( buf->content_length < output_len )
output_len = buf->content_length;
/* Calculate the number of bytes that need to be drawn from lower memory
* address */
if( buf->start + output_len > buf->capacity )
{
overflow = ( buf->start + output_len ) % buf->capacity;
}
memcpy( output, buf->buffer + buf->start, output_len - overflow );
memcpy( output + output_len - overflow, buf->buffer, overflow );
buf->content_length -= output_len;
buf->start = ( buf->start + output_len ) % buf->capacity;
return output_len;
}
/*
* Context for the I/O callbacks simulating network connection.
*/
#define MBEDTLS_MOCK_SOCKET_CONNECTED 1
typedef struct mbedtls_mock_socket
{
int status;
uint32_t blocking_pattern;
mbedtls_test_buffer *input;
mbedtls_test_buffer *output;
struct mbedtls_mock_socket *peer;
} mbedtls_mock_socket;
/*
* Setup and teardown functions for mock sockets.
*/
void mbedtls_mock_socket_init( mbedtls_mock_socket *socket )
{
memset( socket, 0, sizeof( *socket ) );
}
/*
* Closes the socket \p socket.
*
* \p socket must have been previously initialized by calling
* mbedtls_mock_socket_init().
*
* This function frees all allocated resources and both sockets are aware of the
* new connection state.
*
* That is, this function does not simulate half-open TCP connections and the
* phenomenon that when closing a UDP connection the peer is not aware of the
* connection having been closed.
*/
void mbedtls_mock_socket_close( mbedtls_mock_socket* socket )
{
if( socket == NULL )
return;
if( socket->input != NULL )
{
mbedtls_test_buffer_free( socket->input );
mbedtls_free( socket->input );
}
if( socket->output != NULL )
{
mbedtls_test_buffer_free( socket->output );
mbedtls_free( socket->output );
}
if( socket->peer != NULL )
memset( socket->peer, 0, sizeof( *socket->peer ) );
memset( socket, 0, sizeof( *socket ) );
}
/*
* Establishes a connection between \p peer1 and \p peer2.
*
* \p peer1 and \p peer2 must have been previously initialized by calling
* mbedtls_mock_socket_init().
*
* The capacites of the internal buffers are set to \p bufsize. Setting this to
* the correct value allows for simulation of MTU, sanity testing the mock
* implementation and mocking TCP connections with lower memory cost.
*/
int mbedtls_mock_socket_connect( mbedtls_mock_socket* peer1,
mbedtls_mock_socket* peer2,
size_t bufsize )
{
int ret = -1;
peer1->input = peer2->output =
(mbedtls_test_buffer*) mbedtls_calloc( 1, sizeof(mbedtls_test_buffer) );
if( peer1->input == NULL )
{
ret = MBEDTLS_ERR_SSL_ALLOC_FAILED;
goto exit;
}
mbedtls_test_buffer_init( peer1->input );
if( 0 != ( ret = mbedtls_test_buffer_setup( peer1->input, bufsize ) ) )
{
goto exit;
}
peer1->output = peer2->input =
(mbedtls_test_buffer*) mbedtls_calloc( 1, sizeof(mbedtls_test_buffer) );
if( peer1->output == NULL )
{
ret = MBEDTLS_ERR_SSL_ALLOC_FAILED;
goto exit;
}
mbedtls_test_buffer_init( peer1->output );
if( 0 != ( ret = mbedtls_test_buffer_setup( peer1->output, bufsize ) ) )
{
goto exit;
}
peer1->peer = peer2;
peer2->peer = peer1;
peer1->status = peer2->status = MBEDTLS_MOCK_SOCKET_CONNECTED;
ret = 0;
exit:
if( ret != 0 )
{
mbedtls_mock_socket_close( peer1 );
mbedtls_mock_socket_close( peer2 );
}
return ret;
}
/*
* Set the blocking pattern for the socket.
*
* For every bit of \p blocking_pattern set to one the socket will simulate a
* "would block" event. The bits are processed starting with the least
* significant bit and every call to a non-blocking I/O function consumes one.
*
* The behaviour of blocking I/O functions remains unchanged.
*/
int mbedtls_mock_socket_set_block( mbedtls_mock_socket* socket,
uint32_t blocking_pattern )
{
if( socket == NULL )
return -1;
socket->blocking_pattern = blocking_pattern;
return 0;
}
/*
* Callbacks for simulating blocking I/O over connection-oriented transport.
*/
int mbedtls_mock_tcp_send_b( void *ctx, const unsigned char *buf, size_t len )
{
mbedtls_mock_socket *socket = (mbedtls_mock_socket*) ctx;
if( socket == NULL || socket->status != MBEDTLS_MOCK_SOCKET_CONNECTED )
return -1;
return mbedtls_test_buffer_put( socket->output, buf, len );
}
int mbedtls_mock_tcp_recv_b( void *ctx, unsigned char *buf, size_t len )
{
mbedtls_mock_socket *socket = (mbedtls_mock_socket*) ctx;
if( socket == NULL || socket->status != MBEDTLS_MOCK_SOCKET_CONNECTED )
return -1;
return mbedtls_test_buffer_get( socket->input, buf, len );
}
/*
* Callbacks for simulating non-blocking I/O over connection-oriented transport.
*/
int mbedtls_mock_tcp_send_nb( void *ctx, const unsigned char *buf, size_t len )
{
mbedtls_mock_socket *socket = (mbedtls_mock_socket*) ctx;
if( socket == NULL || socket->status != MBEDTLS_MOCK_SOCKET_CONNECTED )
return -1;
if( socket->blocking_pattern & 1 )
{
socket->blocking_pattern >>= 1;
return MBEDTLS_ERR_SSL_WANT_WRITE;
}
socket->blocking_pattern >>= 1;
return mbedtls_test_buffer_put( socket->output, buf, len );
}
int mbedtls_mock_tcp_recv_nb( void *ctx, unsigned char *buf, size_t len )
{
mbedtls_mock_socket *socket = (mbedtls_mock_socket*) ctx;
if( socket == NULL || socket->status != MBEDTLS_MOCK_SOCKET_CONNECTED )
return -1;
if( socket->blocking_pattern & 1 )
{
socket->blocking_pattern >>= 1;
return MBEDTLS_ERR_SSL_WANT_READ;
}
socket->blocking_pattern >>= 1;
return mbedtls_test_buffer_get( socket->input, buf, len );
}
/*
* Helper function setting up inverse record transformations
* using given cipher, hash, EtM mode, authentication tag length,
@ -361,6 +698,440 @@ static int ssl_populate_session( mbedtls_ssl_session *session,
* END_DEPENDENCIES
*/
/* BEGIN_CASE */
void test_callback_buffer_sanity()
{
enum { MSGLEN = 10 };
mbedtls_test_buffer buf;
unsigned char input[MSGLEN];
unsigned char output[MSGLEN];
memset( input, 0, sizeof(input) );
/* Make sure calling put and get on NULL buffer results in error. */
TEST_ASSERT( mbedtls_test_buffer_put( NULL, input, sizeof( input ) )
== -1 );
TEST_ASSERT( mbedtls_test_buffer_get( NULL, output, sizeof( output ) )
== -1 );
TEST_ASSERT( mbedtls_test_buffer_put( NULL, NULL, sizeof( input ) ) == -1 );
TEST_ASSERT( mbedtls_test_buffer_get( NULL, NULL, sizeof( output ) )
== -1 );
TEST_ASSERT( mbedtls_test_buffer_put( NULL, NULL, 0 ) == -1 );
TEST_ASSERT( mbedtls_test_buffer_get( NULL, NULL, 0 ) == -1 );
/* Make sure calling put and get on a buffer that hasn't been set up results
* in eror. */
mbedtls_test_buffer_init( &buf );
TEST_ASSERT( mbedtls_test_buffer_put( &buf, input, sizeof( input ) ) == -1 );
TEST_ASSERT( mbedtls_test_buffer_get( &buf, output, sizeof( output ) )
== -1 );
TEST_ASSERT( mbedtls_test_buffer_put( &buf, NULL, sizeof( input ) ) == -1 );
TEST_ASSERT( mbedtls_test_buffer_get( &buf, NULL, sizeof( output ) )
== -1 );
TEST_ASSERT( mbedtls_test_buffer_put( &buf, NULL, 0 ) == -1 );
TEST_ASSERT( mbedtls_test_buffer_get( &buf, NULL, 0 ) == -1 );
/* Make sure calling put end get on NULL input and output only results in
* error if the length is not zero. */
TEST_ASSERT( mbedtls_test_buffer_setup( &buf, sizeof( input ) ) == 0 );
TEST_ASSERT( mbedtls_test_buffer_put( &buf, NULL, sizeof( input ) ) == -1 );
TEST_ASSERT( mbedtls_test_buffer_get( &buf, NULL, sizeof( output ) )
== -1 );
TEST_ASSERT( mbedtls_test_buffer_put( &buf, NULL, 0 ) == 0 );
TEST_ASSERT( mbedtls_test_buffer_get( &buf, NULL, 0 ) == 0 );
exit:
mbedtls_test_buffer_free( &buf );
}
/* END_CASE */
/*
* Test if the implementation of `mbedtls_test_buffer` related functions is
* correct and works as expected.
*
* That is
* - If we try to put in \p put1 bytes then we can put in \p put1_ret bytes.
* - Afterwards if we try to get \p get1 bytes then we can get \get1_ret bytes.
* - Next, if we try to put in \p put1 bytes then we can put in \p put1_ret
* bytes.
* - Afterwards if we try to get \p get1 bytes then we can get \get1_ret bytes.
* - All of the bytes we got match the bytes we put in in a FIFO manner.
*/
/* BEGIN_CASE */
void test_callback_buffer( int size, int put1, int put1_ret,
int get1, int get1_ret, int put2, int put2_ret,
int get2, int get2_ret )
{
enum { ROUNDS = 2 };
size_t put[ROUNDS];
int put_ret[ROUNDS];
size_t get[ROUNDS];
int get_ret[ROUNDS];
mbedtls_test_buffer buf;
unsigned char* input = NULL;
size_t input_len;
unsigned char* output = NULL;
size_t output_len;
size_t i, j, written, read;
mbedtls_test_buffer_init( &buf );
TEST_ASSERT( mbedtls_test_buffer_setup( &buf, size ) == 0 );
/* Check the sanity of input parameters and initialise local variables. That
* is, ensure that the amount of data is not negative and that we are not
* expecting more to put or get than we actually asked for. */
TEST_ASSERT( put1 >= 0 );
put[0] = put1;
put_ret[0] = put1_ret;
TEST_ASSERT( put1_ret <= put1 );
TEST_ASSERT( put2 >= 0 );
put[1] = put2;
put_ret[1] = put2_ret;
TEST_ASSERT( put2_ret <= put2 );
TEST_ASSERT( get1 >= 0 );
get[0] = get1;
get_ret[0] = get1_ret;
TEST_ASSERT( get1_ret <= get1 );
TEST_ASSERT( get2 >= 0 );
get[1] = get2;
get_ret[1] = get2_ret;
TEST_ASSERT( get2_ret <= get2 );
input_len = 0;
/* Calculate actual input and output lengths */
for( j = 0; j < ROUNDS; j++ )
{
if( put_ret[j] > 0 )
{
input_len += put_ret[j];
}
}
/* In order to always have a valid pointer we always allocate at least 1
* byte. */
if( input_len == 0 )
input_len = 1;
ASSERT_ALLOC( input, input_len );
output_len = 0;
for( j = 0; j < ROUNDS; j++ )
{
if( get_ret[j] > 0 )
{
output_len += get_ret[j];
}
}
TEST_ASSERT( output_len <= input_len );
/* In order to always have a valid pointer we always allocate at least 1
* byte. */
if( output_len == 0 )
output_len = 1;
ASSERT_ALLOC( output, output_len );
/* Fill up the buffer with structured data so that unwanted changes
* can be detected */
for( i = 0; i < input_len; i++ )
{
input[i] = i & 0xFF;
}
written = read = 0;
for( j = 0; j < ROUNDS; j++ )
{
TEST_ASSERT( put_ret[j] == mbedtls_test_buffer_put( &buf,
input + written, put[j] ) );
written += put_ret[j];
TEST_ASSERT( get_ret[j] == mbedtls_test_buffer_get( &buf,
output + read, get[j] ) );
read += get_ret[j];
TEST_ASSERT( read <= written );
if( get_ret[j] > 0 )
{
TEST_ASSERT( memcmp( output + read - get_ret[j],
input + read - get_ret[j], get_ret[j] )
== 0 );
}
}
exit:
mbedtls_free( input );
mbedtls_free( output );
mbedtls_test_buffer_free( &buf );
}
/* END_CASE */
/*
* Test if the implementation of `mbedtls_mock_socket` related I/O functions is
* correct and works as expected on unconnected sockets.
*/
/* BEGIN_CASE */
void ssl_mock_sanity( )
{
enum { MSGLEN = 105 };
unsigned char message[MSGLEN];
unsigned char received[MSGLEN];
mbedtls_mock_socket socket;
mbedtls_mock_socket_init( &socket );
TEST_ASSERT( mbedtls_mock_tcp_send_b( &socket, message, MSGLEN ) < 0 );
mbedtls_mock_socket_close( &socket );
mbedtls_mock_socket_init( &socket );
TEST_ASSERT( mbedtls_mock_tcp_recv_b( &socket, received, MSGLEN ) < 0 );
mbedtls_mock_socket_close( &socket );
mbedtls_mock_socket_init( &socket );
TEST_ASSERT( mbedtls_mock_tcp_send_nb( &socket, message, MSGLEN ) < 0 );
mbedtls_mock_socket_close( &socket );
mbedtls_mock_socket_init( &socket );
TEST_ASSERT( mbedtls_mock_tcp_recv_nb( &socket, received, MSGLEN ) < 0 );
mbedtls_mock_socket_close( &socket );
exit:
mbedtls_mock_socket_close( &socket );
}
/* END_CASE */
/*
* Test if the implementation of `mbedtls_mock_socket` related functions can
* send a single message from the client to the server.
*/
/* BEGIN_CASE */
void ssl_mock_tcp( int blocking, int client_pattern, int server_pattern )
{
enum { MSGLEN = 105 };
unsigned char message[MSGLEN];
unsigned char received[MSGLEN];
mbedtls_mock_socket client;
mbedtls_mock_socket server;
size_t written, read;
int send_ret, recv_ret;
mbedtls_ssl_send_t *send;
mbedtls_ssl_recv_t *recv;
uint32_t client_block = client_pattern;
uint32_t server_block = server_pattern;
unsigned i;
if( blocking == 0 )
{
send = mbedtls_mock_tcp_send_nb;
recv = mbedtls_mock_tcp_recv_nb;
}
else
{
send = mbedtls_mock_tcp_send_b;
recv = mbedtls_mock_tcp_recv_b;
}
mbedtls_mock_socket_init( &client );
mbedtls_mock_socket_init( &server );
/* Fill up the buffer with structured data so that unwanted changes
* can be detected */
for( i = 0; i < MSGLEN; i++ )
{
message[i] = i & 0xFF;
}
/* Make sure that sending a message takes a few iterations. */
TEST_ASSERT( 0 == mbedtls_mock_socket_connect( &client, &server,
MSGLEN / 5 ) );
TEST_ASSERT( 0 == mbedtls_mock_socket_set_block( &client, client_block ) );
TEST_ASSERT( 0 == mbedtls_mock_socket_set_block( &server, server_block ) );
/* Send the message to the server */
send_ret = recv_ret = 1;
written = read = 0;
while( send_ret != 0 || recv_ret != 0 )
{
send_ret = send( &client, message + written, MSGLEN - written );
if( ( blocking == 0 ) && ( client_block & 1 ) )
{
TEST_ASSERT( send_ret == MBEDTLS_ERR_SSL_WANT_WRITE );
}
else
{
TEST_ASSERT( send_ret >= 0 );
written += send_ret;
}
client_block >>= 1;
recv_ret = recv( &server, received + read, MSGLEN - read );
if( ( blocking == 0 ) && ( server_block & 1 ) )
{
TEST_ASSERT( recv_ret == MBEDTLS_ERR_SSL_WANT_READ );
}
else
{
TEST_ASSERT( recv_ret >= 0 );
read += recv_ret;
}
server_block >>= 1;
}
TEST_ASSERT( memcmp( message, received, MSGLEN ) == 0 );
exit:
mbedtls_mock_socket_close( &client );
mbedtls_mock_socket_close( &server );
}
/* END_CASE */
/*
* Test if the implementation of `mbedtls_mock_socket` related functions can
* send messages in both direction at the same time (with the I/O calls
* interleaving).
*/
/* BEGIN_CASE */
void ssl_mock_tcp_interleaving( int blocking,
int client_pattern, int server_pattern )
{
enum { ROUNDS = 2 };
enum { MSGLEN = 105 };
unsigned char message[ROUNDS][MSGLEN];
unsigned char received[ROUNDS][MSGLEN];
mbedtls_mock_socket client;
mbedtls_mock_socket server;
size_t written[ROUNDS];
size_t read[ROUNDS];
int send_ret[ROUNDS];
int recv_ret[ROUNDS];
unsigned i, j, progress;
mbedtls_ssl_send_t *send;
mbedtls_ssl_recv_t *recv;
uint32_t client_block = client_pattern;
uint32_t server_block = server_pattern;
if( blocking == 0 )
{
send = mbedtls_mock_tcp_send_nb;
recv = mbedtls_mock_tcp_recv_nb;
}
else
{
send = mbedtls_mock_tcp_send_b;
recv = mbedtls_mock_tcp_recv_b;
}
mbedtls_mock_socket_init( &client );
mbedtls_mock_socket_init( &server );
/* Fill up the buffers with structured data so that unwanted changes
* can be detected */
for( i = 0; i < ROUNDS; i++ )
{
for( j = 0; j < MSGLEN; j++ )
{
message[i][j] = ( i * MSGLEN + j ) & 0xFF;
}
}
/* Make sure that sending a message takes a few iterations. */
TEST_ASSERT( 0 == mbedtls_mock_socket_connect( &client, &server,
MSGLEN / 5 ) );
TEST_ASSERT( 0 == mbedtls_mock_socket_set_block( &client, client_block ) );
TEST_ASSERT( 0 == mbedtls_mock_socket_set_block( &server, server_block ) );
/* Send the message from both sides, interleaving. */
progress = 1;
for( i = 0; i < ROUNDS; i++ )
{
written[i] = 0;
read[i] = 0;
}
/* This loop does not stop as long as there was a successful write or read
* of at least one byte on either side. */
while( progress != 0 )
{
send_ret[0] = send( &client, message[0] + written[0],
MSGLEN - written[0] );
if( ( blocking == 0 ) && ( client_block & 1 ) )
{
TEST_ASSERT( send_ret[0] == MBEDTLS_ERR_SSL_WANT_WRITE );
}
else
{
TEST_ASSERT( send_ret[0] >= 0 );
written[0] += send_ret[0];
}
client_block >>= 1;
send_ret[1] = send( &server, message[1] + written[1],
MSGLEN - written[1] );
if( ( blocking == 0 ) && ( server_block & 1 ) )
{
TEST_ASSERT( send_ret[1] == MBEDTLS_ERR_SSL_WANT_WRITE );
}
else
{
TEST_ASSERT( send_ret[1] >= 0 );
written[1] += send_ret[1];
}
server_block >>= 1;
recv_ret[0] = recv( &server, received[0] + read[0],
MSGLEN - read[0] );
if( ( blocking == 0 ) && ( server_block & 1 ) )
{
TEST_ASSERT( recv_ret[0] == MBEDTLS_ERR_SSL_WANT_READ );
}
else
{
TEST_ASSERT( recv_ret[0] >= 0 );
read[0] += recv_ret[0];
}
server_block >>= 1;
recv_ret[1] = recv( &client, received[1] + read[1],
MSGLEN - read[1] );
if( ( blocking == 0 ) && ( client_block & 1 ) )
{
TEST_ASSERT( recv_ret[1] == MBEDTLS_ERR_SSL_WANT_READ );
}
else
{
TEST_ASSERT( recv_ret[1] >= 0 );
read[1] += recv_ret[1];
}
client_block >>= 1;
progress = 0;
for( i = 0; i < ROUNDS; i++ )
{
if( ( send_ret[i] > 0 ) ||
( send_ret[i] == MBEDTLS_ERR_SSL_WANT_WRITE ) )
{
progress++;
}
if( ( recv_ret[i] > 0 ) ||
( recv_ret[i] == MBEDTLS_ERR_SSL_WANT_READ ) )
{
progress++;
}
}
}
for( i = 0; i < ROUNDS; i++ )
TEST_ASSERT( memcmp( message[i], received[i], MSGLEN ) == 0 );
exit:
mbedtls_mock_socket_close( &client );
mbedtls_mock_socket_close( &server );
}
/* END_CASE */
/* BEGIN_CASE depends_on:MBEDTLS_SSL_DTLS_ANTI_REPLAY */
void ssl_dtls_replay( data_t * prevs, data_t * new, int ret )
{