mbedtls/tests/suites/test_suite_base64.function

/* BEGIN_HEADER */
#include "mbedtls/base64.h"
#include "constant_time_internal.h"
#include "constant_time_invasive.h"
#include <test/constant_flow.h>

#if defined(MBEDTLS_TEST_HOOKS)
static const char base64_digits[] =
    "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
#endif /* MBEDTLS_TEST_HOOKS */

/* END_HEADER */

/* BEGIN_DEPENDENCIES
 * depends_on:MBEDTLS_BASE64_C
 * END_DEPENDENCIES
 */

/* BEGIN_CASE depends_on:MBEDTLS_TEST_HOOKS */
void mask_of_range( int low_arg, int high_arg )
{
    unsigned char low = low_arg, high = high_arg;
    unsigned c;
    for( c = 0; c <= 0xff; c++ )
    {
        mbedtls_test_set_step( c );
        TEST_CF_SECRET( &c, sizeof( c ) );
        unsigned char m = mbedtls_ct_uchar_mask_of_range( low, high, c );
        TEST_CF_PUBLIC( &c, sizeof( c ) );
        TEST_CF_PUBLIC( &m, sizeof( m ) );
        if( low <= c && c <= high )
            TEST_EQUAL( m, 0xff );
        else
            TEST_EQUAL( m, 0 );
    }
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_TEST_HOOKS */
void enc_chars( )
{
    for( unsigned value = 0; value < 64; value++ )
    {
        mbedtls_test_set_step( value );
        TEST_CF_SECRET( &value, sizeof( value ) );
        unsigned char digit = mbedtls_ct_base64_enc_char( value );
        TEST_CF_PUBLIC( &value, sizeof( value ) );
        TEST_CF_PUBLIC( &digit, sizeof( digit ) );
        TEST_EQUAL( digit, base64_digits[value] );
    }
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_TEST_HOOKS */
void dec_chars( )
{
    char *p;
    signed char expected;

    for( unsigned c = 0; c <= 0xff; c++ )
    {
        mbedtls_test_set_step( c );
        /* base64_digits is 0-terminated. sizeof()-1 excludes the trailing 0. */
        p = memchr( base64_digits, c, sizeof( base64_digits ) - 1 );
        if( p == NULL )
            expected = -1;
        else
            expected = p - base64_digits;
        TEST_CF_SECRET( &c, sizeof( c ) );
        signed char actual = mbedtls_ct_base64_dec_value( c );
        TEST_CF_PUBLIC( &c, sizeof( c ) );
        TEST_CF_PUBLIC( &actual, sizeof( actual ) );
        TEST_EQUAL( actual, expected );
    }
}
/* END_CASE */

/* BEGIN_CASE */
void mbedtls_base64_encode( char * src_string, char * dst_string,
                            int dst_buf_size, int result )
{
    unsigned char src_str[1000];
    unsigned char dst_str[1000];
    size_t len, src_len;

    memset(src_str, 0x00, 1000);
    memset(dst_str, 0x00, 1000);

    strncpy( (char *) src_str, src_string, sizeof(src_str) - 1 );
    src_len = strlen( (char *) src_str );

    TEST_CF_SECRET( src_str, sizeof( src_str ) );
    TEST_ASSERT( mbedtls_base64_encode( dst_str, dst_buf_size, &len, src_str, src_len) == result );
    TEST_CF_PUBLIC( src_str, sizeof( src_str ) );

    /* dest_str will have had tainted data copied to it, prevent the TEST_ASSERT below from triggering
       CF failures by unmarking it. */
    TEST_CF_PUBLIC( dst_str, len );

    if( result == 0 )
    {
        TEST_ASSERT( strcmp( (char *) dst_str, dst_string ) == 0 );
    }
}
/* END_CASE */

/* BEGIN_CASE */
void mbedtls_base64_decode( char * src_string, char * dst_string, int result )
{
    unsigned char src_str[1000];
    unsigned char dst_str[1000];
    size_t len;
    int res;

    memset(src_str, 0x00, 1000);
    memset(dst_str, 0x00, 1000);

    strncpy( (char *) src_str, src_string, sizeof(src_str) - 1 );
    res = mbedtls_base64_decode( dst_str, sizeof( dst_str ), &len, src_str, strlen( (char *) src_str ) );
    TEST_ASSERT( res == result );
    if( result == 0 )
    {
        TEST_ASSERT( strcmp( (char *) dst_str, dst_string ) == 0 );
    }
}
/* END_CASE */

/* BEGIN_CASE */
void base64_encode_hex( data_t * src, char * dst, int dst_buf_size,
                        int result )
{
    unsigned char *res = NULL;
    size_t len;

    res = mbedtls_test_zero_alloc( dst_buf_size );

    TEST_CF_SECRET( src->x, src->len );
    TEST_ASSERT( mbedtls_base64_encode( res, dst_buf_size, &len, src->x, src->len ) == result );
    TEST_CF_PUBLIC( src->x, src->len );

    /* res will have had tainted data copied to it, prevent the TEST_ASSERT below from triggering
       CF failures by unmarking it. */
    TEST_CF_PUBLIC( res, len );

    if( result == 0 )
    {
        TEST_ASSERT( len == strlen( dst ) );
        TEST_ASSERT( memcmp( dst, res, len ) == 0 );
    }

exit:
    mbedtls_free( res );
}
/* END_CASE */

/* BEGIN_CASE */
void base64_decode_hex( char * src, data_t * dst, int dst_buf_size,
                        int result )
{
    unsigned char *res = NULL;
    size_t len;

    res = mbedtls_test_zero_alloc( dst_buf_size );

    TEST_ASSERT( mbedtls_base64_decode( res, dst_buf_size, &len, (unsigned char *) src,
                                strlen( src ) ) == result );
    if( result == 0 )
    {
        TEST_ASSERT( len == dst->len );
        TEST_ASSERT( memcmp( dst->x, res, len ) == 0 );
    }

exit:
    mbedtls_free( res );
}
/* END_CASE */

/* BEGIN_CASE */
void base64_decode_hex_src( data_t * src, char * dst_ref, int result )
{
    unsigned char dst[1000] = { 0 };
    size_t len;

    TEST_ASSERT( mbedtls_base64_decode( dst, sizeof( dst ), &len, src->x, src->len ) == result );
    if( result == 0 )
    {
        TEST_ASSERT( len == strlen( dst_ref ) );
        TEST_ASSERT( memcmp( dst, dst_ref, len ) == 0 );
    }

exit:
    ;;
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_SELF_TEST */
void base64_selftest(  )
{
    TEST_ASSERT( mbedtls_base64_self_test( 1 ) == 0 );
}
/* END_CASE */