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mbedtls/tests/suites/test_suite_asn1write.function
Mykhailo Sopiha 6af7bf91f2 Add test cases for ASN.1 ENUMERATED tag 
Add test cases for writing and parsing ASN.1 ENUMERATED
tag values.

Signed-off-by: Mykhailo Sopiha <mykhailo.sopiha@linaro.org>
2019-10-31 19:17:36 +02:00

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/* BEGIN_HEADER */
#include "mbedtls/asn1write.h"
#define GUARD_LEN 4
#define GUARD_VAL 0x2a
typedef struct
{
unsigned char *output;
unsigned char *start;
unsigned char *end;
unsigned char *p;
size_t size;
} generic_write_data_t;
int generic_write_start_step( generic_write_data_t *data )
{
test_set_step( data->size );
ASSERT_ALLOC( data->output, data->size == 0 ? 1 : data->size );
data->end = data->output + data->size;
data->p = data->end;
data->start = data->end - data->size;
return( 1 );
exit:
return( 0 );
}
int generic_write_finish_step( generic_write_data_t *data,
const data_t *expected, int ret )
{
int ok = 0;
if( data->size < expected->len )
{
TEST_EQUAL( ret, MBEDTLS_ERR_ASN1_BUF_TOO_SMALL );
}
else
{
TEST_EQUAL( ret, data->end - data->p );
TEST_ASSERT( data->p >= data->start );
TEST_ASSERT( data->p <= data->end );
ASSERT_COMPARE( data->p, (size_t)( data->end - data->p ),
expected->x, expected->len );
}
ok = 1;
exit:
mbedtls_free( data->output );
data->output = NULL;
return( ok );
}
/* END_HEADER */
/* BEGIN_DEPENDENCIES
* depends_on:MBEDTLS_ASN1_WRITE_C
* END_DEPENDENCIES
*/
/* BEGIN_CASE */
void mbedtls_asn1_write_null( data_t *expected )
{
generic_write_data_t data = { NULL, NULL, NULL, NULL, 0 };
int ret;
for( data.size = 0; data.size < expected->len + 1; data.size++ )
{
if( ! generic_write_start_step( &data ) )
goto exit;
ret = mbedtls_asn1_write_null( &data.p, data.start );
if( ! generic_write_finish_step( &data, expected, ret ) )
goto exit;
}
exit:
mbedtls_free( data.output );
}
/* END_CASE */
/* BEGIN_CASE */
void mbedtls_asn1_write_bool( int val, data_t *expected )
{
generic_write_data_t data = { NULL, NULL, NULL, NULL, 0 };
int ret;
for( data.size = 0; data.size < expected->len + 1; data.size++ )
{
if( ! generic_write_start_step( &data ) )
goto exit;
ret = mbedtls_asn1_write_bool( &data.p, data.start, val );
if( ! generic_write_finish_step( &data, expected, ret ) )
goto exit;
}
exit:
mbedtls_free( data.output );
}
/* END_CASE */
/* BEGIN_CASE */
void mbedtls_asn1_write_int( int val, data_t *expected )
{
generic_write_data_t data = { NULL, NULL, NULL, NULL, 0 };
int ret;
for( data.size = 0; data.size < expected->len + 1; data.size++ )
{
if( ! generic_write_start_step( &data ) )
goto exit;
ret = mbedtls_asn1_write_int( &data.p, data.start, val );
if( ! generic_write_finish_step( &data, expected, ret ) )
goto exit;
}
exit:
mbedtls_free( data.output );
}
/* END_CASE */
/* BEGIN_CASE */
void mbedtls_asn1_write_enum( int val, data_t *expected )
{
generic_write_data_t data = { NULL, NULL, NULL, NULL, 0 };
int ret;
for( data.size = 0; data.size < expected->len + 1; data.size++ )
{
if( ! generic_write_start_step( &data ) )
goto exit;
ret = mbedtls_asn1_write_enum( &data.p, data.start, val );
if( ! generic_write_finish_step( &data, expected, ret ) )
goto exit;
}
exit:
mbedtls_free( data.output );
}
/* END_CASE */
/* BEGIN_CASE depends_on:MBEDTLS_BIGNUM_C */
void mbedtls_asn1_write_mpi( data_t *val, data_t *expected )
{
generic_write_data_t data = { NULL, NULL, NULL, NULL, 0 };
mbedtls_mpi mpi;
int ret;
mbedtls_mpi_init( &mpi );
TEST_ASSERT( mbedtls_mpi_read_binary( &mpi, val->x, val->len ) == 0 );
for( data.size = 0; data.size < expected->len + 1; data.size++ )
{
if( ! generic_write_start_step( &data ) )
goto exit;
ret = mbedtls_asn1_write_mpi( &data.p, data.start, &mpi );
if( ! generic_write_finish_step( &data, expected, ret ) )
goto exit;
if( expected->len > 10 && data.size == 8 )
data.size = expected->len - 2;
}
exit:
mbedtls_mpi_free( &mpi );
mbedtls_free( data.output );
}
/* END_CASE */
/* BEGIN_CASE */
void mbedtls_asn1_write_string( int tag, data_t *content, data_t *expected )
{
generic_write_data_t data = { NULL, NULL, NULL, NULL, 0 };
int ret;
for( data.size = 0; data.size < expected->len + 1; data.size++ )
{
if( ! generic_write_start_step( &data ) )
goto exit;
switch( tag )
{
case MBEDTLS_ASN1_OCTET_STRING:
ret = mbedtls_asn1_write_octet_string(
&data.p, data.start, content->x, content->len );
break;
case MBEDTLS_ASN1_OID:
ret = mbedtls_asn1_write_oid(
&data.p, data.start,
(const char *) content->x, content->len );
break;
case MBEDTLS_ASN1_UTF8_STRING:
ret = mbedtls_asn1_write_utf8_string(
&data.p, data.start,
(const char *) content->x, content->len );
break;
case MBEDTLS_ASN1_PRINTABLE_STRING:
ret = mbedtls_asn1_write_printable_string(
&data.p, data.start,
(const char *) content->x, content->len );
break;
case MBEDTLS_ASN1_IA5_STRING:
ret = mbedtls_asn1_write_ia5_string(
&data.p, data.start,
(const char *) content->x, content->len );
break;
default:
ret = mbedtls_asn1_write_tagged_string(
&data.p, data.start, tag,
(const char *) content->x, content->len );
}
if( ! generic_write_finish_step( &data, expected, ret ) )
goto exit;
if( expected->len > 10 && data.size == 8 )
data.size = expected->len - 2;
}
exit:
mbedtls_free( data.output );
}
/* END_CASE */
/* BEGIN_CASE */
void mbedtls_asn1_write_algorithm_identifier( data_t *oid,
int par_len,
data_t *expected )
{
generic_write_data_t data = { NULL, NULL, NULL, NULL, 0 };
int ret;
for( data.size = 0; data.size < expected->len + 1; data.size++ )
{
if( ! generic_write_start_step( &data ) )
goto exit;
ret = mbedtls_asn1_write_algorithm_identifier(
&data.p, data.start,
(const char *) oid->x, oid->len, par_len );
/* If params_len != 0, mbedtls_asn1_write_algorithm_identifier()
* assumes that the parameters are already present in the buffer
* and returns a length that accounts for this, but our test
* data omits the parameters. */
if( ret >= 0 )
ret -= par_len;
if( ! generic_write_finish_step( &data, expected, ret ) )
goto exit;
}
exit:
mbedtls_free( data.output );
}
/* END_CASE */
/* BEGIN_CASE depends_on:MBEDTLS_ASN1_PARSE_C */
void mbedtls_asn1_write_len( int len, data_t * asn1, int buf_len,
int result )
{
int ret;
unsigned char buf[150];
unsigned char *p;
size_t i;
size_t read_len;
memset( buf, GUARD_VAL, sizeof( buf ) );
p = buf + GUARD_LEN + buf_len;
ret = mbedtls_asn1_write_len( &p, buf + GUARD_LEN, (size_t) len );
TEST_ASSERT( ret == result );
/* Check for buffer overwrite on both sides */
for( i = 0; i < GUARD_LEN; i++ )
{
TEST_ASSERT( buf[i] == GUARD_VAL );
TEST_ASSERT( buf[GUARD_LEN + buf_len + i] == GUARD_VAL );
}
if( result >= 0 )
{
TEST_ASSERT( p + asn1->len == buf + GUARD_LEN + buf_len );
TEST_ASSERT( memcmp( p, asn1->x, asn1->len ) == 0 );
/* Read back with mbedtls_asn1_get_len() to check */
ret = mbedtls_asn1_get_len( &p, buf + GUARD_LEN + buf_len, &read_len );
if( len == 0 )
{
TEST_ASSERT( ret == 0 );
}
else
{
/* Return will be MBEDTLS_ERR_ASN1_OUT_OF_DATA because the rest of
* the buffer is missing
*/
TEST_ASSERT( ret == MBEDTLS_ERR_ASN1_OUT_OF_DATA );
}
TEST_ASSERT( read_len == (size_t) len );
TEST_ASSERT( p == buf + GUARD_LEN + buf_len );
}
}
/* END_CASE */
/* BEGIN_CASE */
void test_asn1_write_bitstrings( data_t *bitstring, int bits,
data_t *expected, int is_named )
{
generic_write_data_t data = { NULL, NULL, NULL, NULL, 0 };
int ret;
int ( *func )( unsigned char **p, unsigned char *start,
const unsigned char *buf, size_t bits ) =
( is_named ? mbedtls_asn1_write_named_bitstring :
mbedtls_asn1_write_bitstring );
for( data.size = 0; data.size < expected->len + 1; data.size++ )
{
if( ! generic_write_start_step( &data ) )
goto exit;
ret = ( *func )( &data.p, data.start, bitstring->x, bits );
if( ! generic_write_finish_step( &data, expected, ret ) )
goto exit;
}
exit:
mbedtls_free( data.output );
}
/* END_CASE */
/* BEGIN_CASE */
void store_named_data_find( data_t *oid0, data_t *oid1,
data_t *oid2, data_t *oid3,
data_t *needle, int from, int position )
{
data_t *oid[4] = {oid0, oid1, oid2, oid3};
mbedtls_asn1_named_data nd[] ={
{ {0x06, 0, NULL}, {0, 0, NULL}, NULL, 0 },
{ {0x06, 0, NULL}, {0, 0, NULL}, NULL, 0 },
{ {0x06, 0, NULL}, {0, 0, NULL}, NULL, 0 },
{ {0x06, 0, NULL}, {0, 0, NULL}, NULL, 0 },
};
mbedtls_asn1_named_data *pointers[ARRAY_LENGTH( nd ) + 1];
size_t i;
mbedtls_asn1_named_data *head = NULL;
mbedtls_asn1_named_data *found = NULL;
for( i = 0; i < ARRAY_LENGTH( nd ); i++ )
pointers[i] = &nd[i];
pointers[ARRAY_LENGTH( nd )] = NULL;
for( i = 0; i < ARRAY_LENGTH( nd ); i++ )
{
ASSERT_ALLOC( nd[i].oid.p, oid[i]->len );
memcpy( nd[i].oid.p, oid[i]->x, oid[i]->len );
nd[i].oid.len = oid[i]->len;
nd[i].next = pointers[i+1];
}
head = pointers[from];
found = mbedtls_asn1_store_named_data( &head,
(const char *) needle->x,
needle->len,
NULL, 0 );
/* In any case, the existing list structure must be unchanged. */
for( i = 0; i < ARRAY_LENGTH( nd ); i++ )
TEST_ASSERT( nd[i].next == pointers[i+1] );
if( position >= 0 )
{
/* position should have been found and modified. */
TEST_ASSERT( head == pointers[from] );
TEST_ASSERT( found == pointers[position] );
}
else
{
/* A new entry should have been created. */
TEST_ASSERT( found == head );
TEST_ASSERT( head->next == pointers[from] );
for( i = 0; i < ARRAY_LENGTH( nd ); i++ )
TEST_ASSERT( found != &nd[i] );
}
exit:
if( found != NULL && found == head && found != pointers[from] )
{
mbedtls_free( found->oid.p );
mbedtls_free( found );
}
for( i = 0; i < ARRAY_LENGTH( nd ); i++ )
mbedtls_free( nd[i].oid.p );
}
/* END_CASE */
/* BEGIN_CASE */
void store_named_data_val_found( int old_len, int new_len )
{
mbedtls_asn1_named_data nd =
{ {0x06, 3, (unsigned char *) "OID"}, {0, 0, NULL}, NULL, 0 };
mbedtls_asn1_named_data *head = &nd;
mbedtls_asn1_named_data *found = NULL;
unsigned char *old_val = NULL;
unsigned char *new_val = (unsigned char *) "new value";
if( old_len != 0 )
{
ASSERT_ALLOC( nd.val.p, (size_t) old_len );
old_val = nd.val.p;
nd.val.len = old_len;
memset( old_val, 'x', old_len );
}
if( new_len <= 0 )
{
new_len = - new_len;
new_val = NULL;
}
found = mbedtls_asn1_store_named_data( &head, "OID", 3,
new_val, new_len );
TEST_ASSERT( head == &nd );
TEST_ASSERT( found == head );
if( new_val != NULL)
ASSERT_COMPARE( found->val.p, found->val.len,
new_val, (size_t) new_len );
if( new_len == 0)
TEST_ASSERT( found->val.p == NULL );
else if( new_len == old_len )
TEST_ASSERT( found->val.p == old_val );
else
TEST_ASSERT( found->val.p != old_val );
exit:
mbedtls_free( nd.val.p );
}
/* END_CASE */
/* BEGIN_CASE */
void store_named_data_val_new( int new_len )
{
mbedtls_asn1_named_data *head = NULL;
mbedtls_asn1_named_data *found = NULL;
const unsigned char *oid = (unsigned char *) "OID";
size_t oid_len = strlen( (const char *) oid );
const unsigned char *new_val = (unsigned char *) "new value";
if( new_len <= 0 )
new_val = NULL;
if( new_len < 0 )
new_len = - new_len;
found = mbedtls_asn1_store_named_data( &head,
(const char *) oid, oid_len,
new_val, (size_t) new_len );
TEST_ASSERT( found != NULL );
TEST_ASSERT( found == head );
TEST_ASSERT( found->oid.p != oid );
ASSERT_COMPARE( found->oid.p, found->oid.len, oid, oid_len );
if( new_len == 0 )
TEST_ASSERT( found->val.p == NULL );
else if( new_val == NULL )
TEST_ASSERT( found->val.p != NULL );
else
{
TEST_ASSERT( found->val.p != new_val );
ASSERT_COMPARE( found->val.p, found->val.len,
new_val, (size_t) new_len );
}
exit:
if( found != NULL )
{
mbedtls_free( found->oid.p );
mbedtls_free( found->val.p );
}
mbedtls_free( found );
}
/* END_CASE */
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