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mbedtls/tests/suites/helpers.function
Gilles Peskine dfb5cff2f5 Report the first failure, not the last one 
If test_fail is called multiple times in the same test case, report
the location of the first failure, not the last one.

With this change, you no longer need to take care in tests that use
auxiliary functions not to fail in the main function if the auxiliary
function has failed.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
2020-08-31 10:11:47 +02:00

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#line 2 "suites/helpers.function"
/*----------------------------------------------------------------------------*/
/* Headers */
#include <stdlib.h>
#if defined(MBEDTLS_PLATFORM_C)
#include "mbedtls/platform.h"
#else
#include <stdio.h>
#define mbedtls_fprintf fprintf
#define mbedtls_snprintf snprintf
#define mbedtls_calloc calloc
#define mbedtls_free free
#define mbedtls_exit exit
#define mbedtls_time time
#define mbedtls_time_t time_t
#define MBEDTLS_EXIT_SUCCESS EXIT_SUCCESS
#define MBEDTLS_EXIT_FAILURE EXIT_FAILURE
#endif
#if defined(MBEDTLS_MEMORY_BUFFER_ALLOC_C)
#include "mbedtls/memory_buffer_alloc.h"
#endif
#if defined(MBEDTLS_CHECK_PARAMS)
#include "mbedtls/platform_util.h"
#include <setjmp.h>
#endif
#ifdef _MSC_VER
#include <basetsd.h>
typedef UINT8 uint8_t;
typedef INT32 int32_t;
typedef UINT32 uint32_t;
#define strncasecmp _strnicmp
#define strcasecmp _stricmp
#else
#include <stdint.h>
#endif
#include <string.h>
#if defined(__unix__) || (defined(__APPLE__) && defined(__MACH__))
#include <unistd.h>
#include <strings.h>
#endif
/* Type for Hex parameters */
typedef struct data_tag
{
uint8_t * x;
uint32_t len;
} data_t;
/*----------------------------------------------------------------------------*/
/* Status and error constants */
#define DEPENDENCY_SUPPORTED 0 /* Dependency supported by build */
#define KEY_VALUE_MAPPING_FOUND 0 /* Integer expression found */
#define DISPATCH_TEST_SUCCESS 0 /* Test dispatch successful */
#define KEY_VALUE_MAPPING_NOT_FOUND -1 /* Integer expression not found */
#define DEPENDENCY_NOT_SUPPORTED -2 /* Dependency not supported */
#define DISPATCH_TEST_FN_NOT_FOUND -3 /* Test function not found */
#define DISPATCH_INVALID_TEST_DATA -4 /* Invalid test parameter type.
Only int, string, binary data
and integer expressions are
allowed */
#define DISPATCH_UNSUPPORTED_SUITE -5 /* Test suite not supported by the
build */
typedef enum
{
PARAMFAIL_TESTSTATE_IDLE = 0, /* No parameter failure call test */
PARAMFAIL_TESTSTATE_PENDING, /* Test call to the parameter failure
* is pending */
PARAMFAIL_TESTSTATE_CALLED /* The test call to the parameter
* failure function has been made */
} paramfail_test_state_t;
/*----------------------------------------------------------------------------*/
/* Macros */
/**
* \brief This macro tests the expression passed to it as a test step or
* individual test in a test case.
*
* It allows a library function to return a value and return an error
* code that can be tested.
*
* When MBEDTLS_CHECK_PARAMS is enabled, calls to the parameter failure
* callback, MBEDTLS_PARAM_FAILED(), will be assumed to be a test
* failure.
*
* This macro is not suitable for negative parameter validation tests,
* as it assumes the test step will not create an error.
*
* \param TEST The test expression to be tested.
*/
#define TEST_ASSERT( TEST ) \
do { \
if( ! (TEST) ) \
{ \
test_fail( #TEST, __LINE__, __FILE__ ); \
goto exit; \
} \
} while( 0 )
/**
* \brief This macro tests the expression passed to it and skips the
* running test if it doesn't evaluate to 'true'.
*
* \param TEST The test expression to be tested.
*/
#define TEST_ASSUME( TEST ) \
do { \
if( ! (TEST) ) \
{ \
test_skip( #TEST, __LINE__, __FILE__ ); \
goto exit; \
} \
} while( 0 )
#if defined(MBEDTLS_CHECK_PARAMS) && !defined(MBEDTLS_PARAM_FAILED_ALT)
/**
* \brief This macro tests the statement passed to it as a test step or
* individual test in a test case. The macro assumes the test will fail
* and will generate an error.
*
* It allows a library function to return a value and tests the return
* code on return to confirm the given error code was returned.
*
* When MBEDTLS_CHECK_PARAMS is enabled, calls to the parameter failure
* callback, MBEDTLS_PARAM_FAILED(), are assumed to indicate the
* expected failure, and the test will pass.
*
* This macro is intended for negative parameter validation tests,
* where the failing function may return an error value or call
* MBEDTLS_PARAM_FAILED() to indicate the error.
*
* \param PARAM_ERROR_VALUE The expected error code.
*
* \param TEST The test expression to be tested.
*/
#define TEST_INVALID_PARAM_RET( PARAM_ERR_VALUE, TEST ) \
do { \
test_info.paramfail_test_state = PARAMFAIL_TESTSTATE_PENDING; \
if( (TEST) != (PARAM_ERR_VALUE) || \
test_info.paramfail_test_state != PARAMFAIL_TESTSTATE_CALLED ) \
{ \
test_fail( #TEST, __LINE__, __FILE__ ); \
goto exit; \
} \
} while( 0 )
/**
* \brief This macro tests the statement passed to it as a test step or
* individual test in a test case. The macro assumes the test will fail
* and will generate an error.
*
* It assumes the library function under test cannot return a value and
* assumes errors can only be indicated byt calls to
* MBEDTLS_PARAM_FAILED().
*
* When MBEDTLS_CHECK_PARAMS is enabled, calls to the parameter failure
* callback, MBEDTLS_PARAM_FAILED(), are assumed to indicate the
* expected failure. If MBEDTLS_CHECK_PARAMS is not enabled, no test
* can be made.
*
* This macro is intended for negative parameter validation tests,
* where the failing function can only return an error by calling
* MBEDTLS_PARAM_FAILED() to indicate the error.
*
* \param TEST The test expression to be tested.
*/
#define TEST_INVALID_PARAM( TEST ) \
do { \
memcpy(jmp_tmp, param_fail_jmp, sizeof(jmp_buf)); \
if( setjmp( param_fail_jmp ) == 0 ) \
{ \
TEST; \
test_fail( #TEST, __LINE__, __FILE__ ); \
goto exit; \
} \
memcpy(param_fail_jmp, jmp_tmp, sizeof(jmp_buf)); \
} while( 0 )
#endif /* MBEDTLS_CHECK_PARAMS && !MBEDTLS_PARAM_FAILED_ALT */
/**
* \brief This macro tests the statement passed to it as a test step or
* individual test in a test case. The macro assumes the test will not fail.
*
* It assumes the library function under test cannot return a value and
* assumes errors can only be indicated by calls to
* MBEDTLS_PARAM_FAILED().
*
* When MBEDTLS_CHECK_PARAMS is enabled, calls to the parameter failure
* callback, MBEDTLS_PARAM_FAILED(), are assumed to indicate the
* expected failure. If MBEDTLS_CHECK_PARAMS is not enabled, no test
* can be made.
*
* This macro is intended to test that functions returning void
* accept all of the parameter values they're supposed to accept - eg
* that they don't call MBEDTLS_PARAM_FAILED() when a parameter
* that's allowed to be NULL happens to be NULL.
*
* Note: for functions that return something other that void,
* checking that they accept all the parameters they're supposed to
* accept is best done by using TEST_ASSERT() and checking the return
* value as well.
*
* Note: this macro is available even when #MBEDTLS_CHECK_PARAMS is
* disabled, as it makes sense to check that the functions accept all
* legal values even if this option is disabled - only in that case,
* the test is more about whether the function segfaults than about
* whether it invokes MBEDTLS_PARAM_FAILED().
*
* \param TEST The test expression to be tested.
*/
#define TEST_VALID_PARAM( TEST ) \
TEST_ASSERT( ( TEST, 1 ) );
#define TEST_HELPER_ASSERT(a) if( !( a ) ) \
{ \
mbedtls_fprintf( stderr, "Assertion Failed at %s:%d - %s\n", \
__FILE__, __LINE__, #a ); \
mbedtls_exit( 1 ); \
}
#if defined(__GNUC__)
/* Test if arg and &(arg)[0] have the same type. This is true if arg is
* an array but not if it's a pointer. */
#define IS_ARRAY_NOT_POINTER( arg ) \
( ! __builtin_types_compatible_p( __typeof__( arg ), \
__typeof__( &( arg )[0] ) ) )
#else
/* On platforms where we don't know how to implement this check,
* omit it. Oh well, a non-portable check is better than nothing. */
#define IS_ARRAY_NOT_POINTER( arg ) 1
#endif
/* A compile-time constant with the value 0. If `const_expr` is not a
* compile-time constant with a nonzero value, cause a compile-time error. */
#define STATIC_ASSERT_EXPR( const_expr ) \
( 0 && sizeof( struct { unsigned int STATIC_ASSERT : 1 - 2 * ! ( const_expr ); } ) )
/* Return the scalar value `value` (possibly promoted). This is a compile-time
* constant if `value` is. `condition` must be a compile-time constant.
* If `condition` is false, arrange to cause a compile-time error. */
#define STATIC_ASSERT_THEN_RETURN( condition, value ) \
( STATIC_ASSERT_EXPR( condition ) ? 0 : ( value ) )
#define ARRAY_LENGTH_UNSAFE( array ) \
( sizeof( array ) / sizeof( *( array ) ) )
/** Return the number of elements of a static or stack array.
*
* \param array A value of array (not pointer) type.
*
* \return The number of elements of the array.
*/
#define ARRAY_LENGTH( array ) \
( STATIC_ASSERT_THEN_RETURN( IS_ARRAY_NOT_POINTER( array ), \
ARRAY_LENGTH_UNSAFE( array ) ) )
/*
* 32-bit integer manipulation macros (big endian)
*/
#ifndef GET_UINT32_BE
#define GET_UINT32_BE(n,b,i) \
{ \
(n) = ( (uint32_t) (b)[(i) ] << 24 ) \
| ( (uint32_t) (b)[(i) + 1] << 16 ) \
| ( (uint32_t) (b)[(i) + 2] << 8 ) \
| ( (uint32_t) (b)[(i) + 3] ); \
}
#endif
#ifndef PUT_UINT32_BE
#define PUT_UINT32_BE(n,b,i) \
{ \
(b)[(i) ] = (unsigned char) ( (n) >> 24 ); \
(b)[(i) + 1] = (unsigned char) ( (n) >> 16 ); \
(b)[(i) + 2] = (unsigned char) ( (n) >> 8 ); \
(b)[(i) + 3] = (unsigned char) ( (n) ); \
}
#endif
/*----------------------------------------------------------------------------*/
/* Global variables */
typedef enum
{
TEST_RESULT_SUCCESS = 0,
TEST_RESULT_FAILED,
TEST_RESULT_SKIPPED
} test_result_t;
static struct
{
paramfail_test_state_t paramfail_test_state;
test_result_t result;
const char *test;
const char *filename;
int line_no;
}
test_info;
#if defined(MBEDTLS_PLATFORM_C)
mbedtls_platform_context platform_ctx;
#endif
#if defined(MBEDTLS_CHECK_PARAMS)
jmp_buf param_fail_jmp;
jmp_buf jmp_tmp;
#endif
/*----------------------------------------------------------------------------*/
/* Helper flags for complex dependencies */
/* Indicates whether we expect mbedtls_entropy_init
* to initialize some strong entropy source. */
#if defined(MBEDTLS_TEST_NULL_ENTROPY) || \
( !defined(MBEDTLS_NO_DEFAULT_ENTROPY_SOURCES) && \
( !defined(MBEDTLS_NO_PLATFORM_ENTROPY) || \
defined(MBEDTLS_HAVEGE_C) || \
defined(MBEDTLS_ENTROPY_HARDWARE_ALT) || \
defined(ENTROPY_NV_SEED) ) )
#define ENTROPY_HAVE_STRONG
#endif
/*----------------------------------------------------------------------------*/
/* Helper Functions */
void test_fail( const char *test, int line_no, const char* filename )
{
if( test_info.result == TEST_RESULT_FAILED )
{
/* We've already recorded the test as having failed. Don't
* overwrite any previous information about the failure. */
return;
}
test_info.result = TEST_RESULT_FAILED;
test_info.test = test;
test_info.line_no = line_no;
test_info.filename = filename;
}
void test_skip( const char *test, int line_no, const char* filename )
{
test_info.result = TEST_RESULT_SKIPPED;
test_info.test = test;
test_info.line_no = line_no;
test_info.filename = filename;
}
static int platform_setup()
{
int ret = 0;
#if defined(MBEDTLS_PLATFORM_C)
ret = mbedtls_platform_setup( &platform_ctx );
#endif /* MBEDTLS_PLATFORM_C */
return( ret );
}
static void platform_teardown()
{
#if defined(MBEDTLS_PLATFORM_C)
mbedtls_platform_teardown( &platform_ctx );
#endif /* MBEDTLS_PLATFORM_C */
}
#if defined(MBEDTLS_CHECK_PARAMS)
void mbedtls_param_failed( const char *failure_condition,
const char *file,
int line )
{
/* If we are testing the callback function... */
if( test_info.paramfail_test_state == PARAMFAIL_TESTSTATE_PENDING )
{
test_info.paramfail_test_state = PARAMFAIL_TESTSTATE_CALLED;
}
else
{
/* ...else we treat this as an error */
/* Record the location of the failure, but not as a failure yet, in case
* it was part of the test */
test_fail( failure_condition, line, file );
test_info.result = TEST_RESULT_SUCCESS;
longjmp( param_fail_jmp, 1 );
}
}
#endif
#if defined(__unix__) || (defined(__APPLE__) && defined(__MACH__))
static int redirect_output( FILE* out_stream, const char* path )
{
int out_fd, dup_fd;
FILE* path_stream;
out_fd = fileno( out_stream );
dup_fd = dup( out_fd );
if( dup_fd == -1 )
{
return( -1 );
}
path_stream = fopen( path, "w" );
if( path_stream == NULL )
{
close( dup_fd );
return( -1 );
}
fflush( out_stream );
if( dup2( fileno( path_stream ), out_fd ) == -1 )
{
close( dup_fd );
fclose( path_stream );
return( -1 );
}
fclose( path_stream );
return( dup_fd );
}
static int restore_output( FILE* out_stream, int dup_fd )
{
int out_fd = fileno( out_stream );
fflush( out_stream );
if( dup2( dup_fd, out_fd ) == -1 )
{
close( out_fd );
close( dup_fd );
return( -1 );
}
close( dup_fd );
return( 0 );
}
#endif /* __unix__ || __APPLE__ __MACH__ */
int mbedtls_test_unhexify( unsigned char *obuf, const char *ibuf )
{
unsigned char c, c2;
int len = strlen( ibuf ) / 2;
TEST_HELPER_ASSERT( strlen( ibuf ) % 2 == 0 ); /* must be even number of bytes */
while( *ibuf != 0 )
{
c = *ibuf++;
if( c >= '0' && c <= '9' )
c -= '0';
else if( c >= 'a' && c <= 'f' )
c -= 'a' - 10;
else if( c >= 'A' && c <= 'F' )
c -= 'A' - 10;
else
TEST_HELPER_ASSERT( 0 );
c2 = *ibuf++;
if( c2 >= '0' && c2 <= '9' )
c2 -= '0';
else if( c2 >= 'a' && c2 <= 'f' )
c2 -= 'a' - 10;
else if( c2 >= 'A' && c2 <= 'F' )
c2 -= 'A' - 10;
else
TEST_HELPER_ASSERT( 0 );
*obuf++ = ( c << 4 ) | c2;
}
return len;
}
void mbedtls_test_hexify( unsigned char *obuf, const unsigned char *ibuf, int len )
{
unsigned char l, h;
while( len != 0 )
{
h = *ibuf / 16;
l = *ibuf % 16;
if( h < 10 )
*obuf++ = '0' + h;
else
*obuf++ = 'a' + h - 10;
if( l < 10 )
*obuf++ = '0' + l;
else
*obuf++ = 'a' + l - 10;
++ibuf;
len--;
}
}
/**
* Allocate and zeroize a buffer.
*
* If the size if zero, a pointer to a zeroized 1-byte buffer is returned.
*
* For convenience, dies if allocation fails.
*/
static unsigned char *zero_alloc( size_t len )
{
void *p;
size_t actual_len = ( len != 0 ) ? len : 1;
p = mbedtls_calloc( 1, actual_len );
TEST_HELPER_ASSERT( p != NULL );
memset( p, 0x00, actual_len );
return( p );
}
/**
* Allocate and fill a buffer from hex data.
*
* The buffer is sized exactly as needed. This allows to detect buffer
* overruns (including overreads) when running the test suite under valgrind.
*
* If the size if zero, a pointer to a zeroized 1-byte buffer is returned.
*
* For convenience, dies if allocation fails.
*/
unsigned char *unhexify_alloc( const char *ibuf, size_t *olen )
{
unsigned char *obuf;
*olen = strlen( ibuf ) / 2;
if( *olen == 0 )
return( zero_alloc( *olen ) );
obuf = mbedtls_calloc( 1, *olen );
TEST_HELPER_ASSERT( obuf != NULL );
(void) mbedtls_test_unhexify( obuf, ibuf );
return( obuf );
}
/**
* This function just returns data from rand().
* Although predictable and often similar on multiple
* runs, this does not result in identical random on
* each run. So do not use this if the results of a
* test depend on the random data that is generated.
*
* rng_state shall be NULL.
*/
static int rnd_std_rand( void *rng_state, unsigned char *output, size_t len )
{
#if !defined(__OpenBSD__) && !defined(__NetBSD__)
size_t i;
if( rng_state != NULL )
rng_state = NULL;
for( i = 0; i < len; ++i )
output[i] = rand();
#else
if( rng_state != NULL )
rng_state = NULL;
arc4random_buf( output, len );
#endif /* !OpenBSD && !NetBSD */
return( 0 );
}
/**
* This function only returns zeros
*
* rng_state shall be NULL.
*/
int rnd_zero_rand( void *rng_state, unsigned char *output, size_t len )
{
if( rng_state != NULL )
rng_state = NULL;
memset( output, 0, len );
return( 0 );
}
typedef struct
{
unsigned char *buf;
size_t length;
} rnd_buf_info;
/**
* This function returns random based on a buffer it receives.
*
* rng_state shall be a pointer to a rnd_buf_info structure.
*
* The number of bytes released from the buffer on each call to
* the random function is specified by per_call. (Can be between
* 1 and 4)
*
* After the buffer is empty it will return rand();
*/
int rnd_buffer_rand( void *rng_state, unsigned char *output, size_t len )
{
rnd_buf_info *info = (rnd_buf_info *) rng_state;
size_t use_len;
if( rng_state == NULL )
return( rnd_std_rand( NULL, output, len ) );
use_len = len;
if( len > info->length )
use_len = info->length;
if( use_len )
{
memcpy( output, info->buf, use_len );
info->buf += use_len;
info->length -= use_len;
}
if( len - use_len > 0 )
return( rnd_std_rand( NULL, output + use_len, len - use_len ) );
return( 0 );
}
/**
* Info structure for the pseudo random function
*
* Key should be set at the start to a test-unique value.
* Do not forget endianness!
* State( v0, v1 ) should be set to zero.
*/
typedef struct
{
uint32_t key[16];
uint32_t v0, v1;
} rnd_pseudo_info;
/**
* This function returns random based on a pseudo random function.
* This means the results should be identical on all systems.
* Pseudo random is based on the XTEA encryption algorithm to
* generate pseudorandom.
*
* rng_state shall be a pointer to a rnd_pseudo_info structure.
*/
int rnd_pseudo_rand( void *rng_state, unsigned char *output, size_t len )
{
rnd_pseudo_info *info = (rnd_pseudo_info *) rng_state;
uint32_t i, *k, sum, delta=0x9E3779B9;
unsigned char result[4], *out = output;
if( rng_state == NULL )
return( rnd_std_rand( NULL, output, len ) );
k = info->key;
while( len > 0 )
{
size_t use_len = ( len > 4 ) ? 4 : len;
sum = 0;
for( i = 0; i < 32; i++ )
{
info->v0 += ( ( ( info->v1 << 4 ) ^ ( info->v1 >> 5 ) )
+ info->v1 ) ^ ( sum + k[sum & 3] );
sum += delta;
info->v1 += ( ( ( info->v0 << 4 ) ^ ( info->v0 >> 5 ) )
+ info->v0 ) ^ ( sum + k[( sum>>11 ) & 3] );
}
PUT_UINT32_BE( info->v0, result, 0 );
memcpy( out, result, use_len );
len -= use_len;
out += 4;
}
return( 0 );
}
int hexcmp( uint8_t * a, uint8_t * b, uint32_t a_len, uint32_t b_len )
{
int ret = 0;
uint32_t i = 0;
if( a_len != b_len )
return( -1 );
for( i = 0; i < a_len; i++ )
{
if( a[i] != b[i] )
{
ret = -1;
break;
}
}
return ret;
}
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