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mbedtls/tests/suites/helpers.function
Ronald Cron b6d6d4c61a tests: Add helpers.c and helpers.h files 
The purpose of helpers.c file is to contain the helper
functions that have been in helpers.function so far and
that are not related to the mechanism of unit test
execution and not related to random number generation
(will be moved in a dedicated file).

The purpose of helpers.h is to contain the interface
exposed by helpers.c thus helper function prototypes.

Make the changes in the build systems (make and cmake)
to build helpers.c and link it to test executables
along with mbedtls library.

Signed-off-by: Ronald Cron <ronald.cron@arm.com>
2020-06-12 14:33:00 +02:00

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#line 2 "suites/helpers.function"
/*----------------------------------------------------------------------------*/
/* Headers */
#include <test/macros.h>
#include <test/helpers.h>
#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.
*
* Failing the test means:
* - Mark this test case as failed.
* - Print a message identifying the failure.
* - Jump to the \c exit label.
*
* This macro expands to an instruction, not an expression.
* It may jump to the \c exit label.
*
* \param TEST The test expression to be tested.
*/
#define TEST_ASSERT( TEST ) \
do { \
if( ! (TEST) ) \
{ \
test_fail( #TEST, __LINE__, __FILE__ ); \
goto exit; \
} \
} while( 0 )
/** Evaluate two expressions and fail the test case if they have different
* values.
*
* \param expr1 An expression to evaluate.
* \param expr2 The expected value of \p expr1. This can be any
* expression, but it is typically a constant.
*/
#define TEST_EQUAL( expr1, expr2 ) \
TEST_ASSERT( ( expr1 ) == ( expr2 ) )
/** 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 )
/** Allocate memory dynamically. If the allocation fails, skip the test case.
*
* This macro behaves like #ASSERT_ALLOC, except that if the allocation
* fails, it marks the test as skipped rather than failed.
*/
#define ASSERT_ALLOC_WEAK( pointer, length ) \
do \
{ \
TEST_ASSERT( ( pointer ) == NULL ); \
if( ( length ) != 0 ) \
{ \
( pointer ) = mbedtls_calloc( sizeof( *( pointer ) ), \
( length ) ); \
TEST_ASSUME( ( pointer ) != NULL ); \
} \
} \
while( 0 )
/** Compare two buffers and fail the test case if they differ.
*
* This macro expands to an instruction, not an expression.
* It may jump to the \c exit label.
*
* \param p1 Pointer to the start of the first buffer.
* \param size1 Size of the first buffer in bytes.
* This expression may be evaluated multiple times.
* \param p2 Pointer to the start of the second buffer.
* \param size2 Size of the second buffer in bytes.
* This expression may be evaluated multiple times.
*/
#define ASSERT_COMPARE( p1, size1, p2, size2 ) \
do \
{ \
TEST_ASSERT( ( size1 ) == ( size2 ) ); \
if( ( size1 ) != 0 ) \
TEST_ASSERT( memcmp( ( p1 ), ( p2 ), ( size1 ) ) == 0 ); \
} \
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 ) );
/** 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 )
/*----------------------------------------------------------------------------*/
/* Global variables */
typedef enum
{
TEST_RESULT_SUCCESS = 0,
TEST_RESULT_FAILED,
TEST_RESULT_SKIPPED
} test_result_t;
typedef struct
{
paramfail_test_state_t paramfail_test_state;
test_result_t result;
const char *test;
const char *filename;
int line_no;
unsigned long step;
}
test_info_t;
static test_info_t test_info;
#if defined(MBEDTLS_PLATFORM_C)
static 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 */
/** Set the test step number for failure reports.
*
* Call this function to display "step NNN" in addition to the line number
* and file name if a test fails. Typically the "step number" is the index
* of a for loop but it can be whatever you want.
*
* \param step The step number to report.
*/
void test_set_step( unsigned long step )
{
test_info.step = step;
}
void test_fail( const char *test, int line_no, const char* filename )
{
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;
}
int platform_setup()
{
int ret = 0;
#if defined(MBEDTLS_PLATFORM_C)
ret = mbedtls_platform_setup( &platform_ctx );
#endif /* MBEDTLS_PLATFORM_C */
return( ret );
}
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 stdout_fd = dup( fileno( *out_stream ) );
if( stdout_fd == -1 )
{
return -1;
}
fflush( *out_stream );
fclose( *out_stream );
*out_stream = fopen( path, "w" );
if( *out_stream == NULL )
{
close( stdout_fd );
return -1;
}
return stdout_fd;
}
static int restore_output( FILE** out_stream, int old_fd )
{
fflush( *out_stream );
fclose( *out_stream );
*out_stream = fdopen( old_fd, "w" );
if( *out_stream == NULL )
{
return -1;
}
return 0;
}
static void close_output( FILE* out_stream )
{
fclose( out_stream );
}
#endif /* __unix__ || __APPLE__ __MACH__ */
int 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 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.
*/
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) 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.
*/
int rnd_std_rand( void *rng_state, unsigned char *output, size_t len )
{
#if !defined(__OpenBSD__)
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 */
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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