test_suite_ccm.c

Go to the documentation of this file.

#if !defined(POLARSSL_CONFIG_FILE)
#include <polarssl/config.h>
#else
#include POLARSSL_CONFIG_FILE
#endif
 
#ifdef POLARSSL_CCM_C
 
#include <polarssl/ccm.h>
#endif /* POLARSSL_CCM_C */
 
 
#if defined(POLARSSL_MEMORY_BUFFER_ALLOC_C)
#include "polarssl/memory.h"
#endif
 
#if defined(POLARSSL_PLATFORM_C)
#include "polarssl/platform.h"
#else
#define polarssl_malloc     malloc
#define polarssl_free       free
#endif
 
#ifdef _MSC_VER
#include <basetsd.h>
typedef UINT32 uint32_t;
#else
#include <inttypes.h>
#endif
 
#include <assert.h>
#include <stdlib.h>
#include <string.h>
 
/*
 * 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
 
static int unhexify(unsigned char *obuf, const char *ibuf)
{
    unsigned char c, c2;
    int len = strlen(ibuf) / 2;
    assert(!(strlen(ibuf) %1)); // 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
            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
            assert( 0 );
 
        *obuf++ = ( c << 4 ) | c2;
    }
 
    return len;
}
 
static 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--;
    }
}
 
static unsigned char *zero_alloc( size_t len )
{
    void *p;
    size_t actual_len = len != 0 ? len : 1;
 
    p = polarssl_malloc( actual_len );
    assert( p != NULL );
 
    memset( p, 0x00, actual_len );
 
    return( p );
}
 
static 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 = polarssl_malloc( *olen );
    assert( obuf != NULL );
 
    (void) unhexify( obuf, ibuf );
 
    return( obuf );
}
 
static 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 );
}
 
static 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;
 
static 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 );
}
 
typedef struct
{
    uint32_t key[16];
    uint32_t v0, v1;
} rnd_pseudo_info;
 
static 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 );
}
 
 
#include <stdio.h>
#include <string.h>
 
#if defined(POLARSSL_PLATFORM_C)
#include "polarssl/platform.h"
#else
#define polarssl_printf     printf
#define polarssl_malloc     malloc
#define polarssl_free       free
#endif
 
static int test_errors = 0;
 
#ifdef POLARSSL_CCM_C
 
#define TEST_SUITE_ACTIVE
 
static int test_assert( int correct, const char *test )
{
    if( correct )
        return( 0 );
 
    test_errors++;
    if( test_errors == 1 )
        printf( "FAILED\n" );
    printf( "  %s\n", test );
 
    return( 1 );
}
 
#define TEST_ASSERT( TEST )                         \
        do { test_assert( (TEST) ? 1 : 0, #TEST );  \
             if( test_errors) goto exit;            \
        } while (0)
 
int verify_string( char **str )
{
    if( (*str)[0] != '"' ||
        (*str)[strlen( *str ) - 1] != '"' )
    {
        printf( "Expected string (with \"\") for parameter and got: %s\n", *str );
        return( -1 );
    }
 
    (*str)++;
    (*str)[strlen( *str ) - 1] = '\0';
 
    return( 0 );
}
 
int verify_int( char *str, int *value )
{
    size_t i;
    int minus = 0;
    int digits = 1;
    int hex = 0;
 
    for( i = 0; i < strlen( str ); i++ )
    {
        if( i == 0 && str[i] == '-' )
        {
            minus = 1;
            continue;
        }
 
        if( ( ( minus && i == 2 ) || ( !minus && i == 1 ) ) &&
            str[i - 1] == '0' && str[i] == 'x' )
        {
            hex = 1;
            continue;
        }
 
        if( ! ( ( str[i] >= '0' && str[i] <= '9' ) ||
                ( hex && ( ( str[i] >= 'a' && str[i] <= 'f' ) ||
                           ( str[i] >= 'A' && str[i] <= 'F' ) ) ) ) )
        {
            digits = 0;
            break;
        }
    }
 
    if( digits )
    {
        if( hex )
            *value = strtol( str, NULL, 16 );
        else
            *value = strtol( str, NULL, 10 );
 
        return( 0 );
    }
 
    if( strcmp( str, "POLARSSL_CIPHER_ID_CAMELLIA" ) == 0 )
    {
        *value = ( POLARSSL_CIPHER_ID_CAMELLIA );
        return( 0 );
    }
    if( strcmp( str, "POLARSSL_CIPHER_ID_BLOWFISH" ) == 0 )
    {
        *value = ( POLARSSL_CIPHER_ID_BLOWFISH );
        return( 0 );
    }
    if( strcmp( str, "POLARSSL_ERR_CCM_BAD_INPUT" ) == 0 )
    {
        *value = ( POLARSSL_ERR_CCM_BAD_INPUT );
        return( 0 );
    }
    if( strcmp( str, "POLARSSL_CIPHER_ID_AES" ) == 0 )
    {
        *value = ( POLARSSL_CIPHER_ID_AES );
        return( 0 );
    }
 
 
    printf( "Expected integer for parameter and got: %s\n", str );
    return( -1 );
}
 
#ifdef POLARSSL_SELF_TEST
#ifdef POLARSSL_AES_C
void test_suite_ccm_self_test( )
{
    TEST_ASSERT( ccm_self_test( 0 ) == 0 );
 
exit:
    return;
}
#endif /* POLARSSL_SELF_TEST */
#endif /* POLARSSL_AES_C */
 
void test_suite_ccm_init( int cipher_id, int key_size, int result )
{
    ccm_context ctx;
    unsigned char key[32];
    int ret;
 
    memset( key, 0x2A, sizeof( key ) );
    TEST_ASSERT( (unsigned) key_size <= 8 * sizeof( key ) );
 
    ret = ccm_init( &ctx, cipher_id, key, key_size );
    TEST_ASSERT( ret == result );
 
exit:
    ccm_free( &ctx );
}
 
#ifdef POLARSSL_AES_C
void test_suite_ccm_lengths( int msg_len, int iv_len, int add_len, int tag_len, int res )
{
    ccm_context ctx;
    unsigned char key[16];
    unsigned char msg[10];
    unsigned char iv[14];
    unsigned char add[10];
    unsigned char out[10];
    unsigned char tag[18];
    int decrypt_ret;
 
    memset( key, 0, sizeof( key ) );
    memset( msg, 0, sizeof( msg ) );
    memset( iv, 0, sizeof( iv ) );
    memset( add, 0, sizeof( add ) );
    memset( out, 0, sizeof( out ) );
    memset( tag, 0, sizeof( tag ) );
 
    TEST_ASSERT( ccm_init( &ctx, POLARSSL_CIPHER_ID_AES,
                                 key, 8 * sizeof( key ) ) == 0 );
 
    TEST_ASSERT( ccm_encrypt_and_tag( &ctx, msg_len, iv, iv_len, add, add_len,
                                      msg, out, tag, tag_len ) == res );
 
    decrypt_ret = ccm_auth_decrypt( &ctx, msg_len, iv, iv_len, add, add_len,
                                    msg, out, tag, tag_len );
 
    if( res == 0 )
        TEST_ASSERT( decrypt_ret == POLARSSL_ERR_CCM_AUTH_FAILED );
    else
        TEST_ASSERT( decrypt_ret == res );
 
exit:
    ccm_free( &ctx );
}
#endif /* POLARSSL_AES_C */
 
void test_suite_ccm_encrypt_and_tag( int cipher_id,
                          char *key_hex, char *msg_hex,
                          char *iv_hex, char *add_hex,
                          char *result_hex )
{
    unsigned char key[32];
    unsigned char msg[50];
    unsigned char iv[13];
    unsigned char add[32];
    unsigned char result[50];
    ccm_context ctx;
    size_t key_len, msg_len, iv_len, add_len, tag_len, result_len;
 
    memset( key, 0x00, sizeof( key ) );
    memset( msg, 0x00, sizeof( msg ) );
    memset( iv, 0x00, sizeof( iv ) );
    memset( add, 0x00, sizeof( add ) );
    memset( result, 0x00, sizeof( result ) );
 
    key_len = unhexify( key, key_hex );
    msg_len = unhexify( msg, msg_hex );
    iv_len = unhexify( iv, iv_hex );
    add_len = unhexify( add, add_hex );
    result_len = unhexify( result, result_hex );
    tag_len = result_len - msg_len;
 
    TEST_ASSERT( ccm_init( &ctx, cipher_id, key, key_len * 8 ) == 0 );
 
    /* Test with input == output */
    TEST_ASSERT( ccm_encrypt_and_tag( &ctx, msg_len, iv, iv_len, add, add_len,
                 msg, msg, msg + msg_len, tag_len ) == 0 );
 
    TEST_ASSERT( memcmp( msg, result, result_len ) == 0 );
 
    /* Check we didn't write past the end */
    TEST_ASSERT( msg[result_len] == 0 && msg[result_len + 1] == 0 );
 
exit:
    ccm_free( &ctx );
}
 
void test_suite_ccm_auth_decrypt( int cipher_id,
                       char *key_hex, char *msg_hex,
                       char *iv_hex, char *add_hex,
                       int tag_len, char *result_hex )
{
    unsigned char key[32];
    unsigned char msg[50];
    unsigned char iv[13];
    unsigned char add[32];
    unsigned char tag[16];
    unsigned char result[50];
    ccm_context ctx;
    size_t key_len, msg_len, iv_len, add_len, result_len;
    int ret;
 
    memset( key, 0x00, sizeof( key ) );
    memset( msg, 0x00, sizeof( msg ) );
    memset( iv, 0x00, sizeof( iv ) );
    memset( add, 0x00, sizeof( add ) );
    memset( tag, 0x00, sizeof( tag ) );
    memset( result, 0x00, sizeof( result ) );
 
    key_len = unhexify( key, key_hex );
    msg_len = unhexify( msg, msg_hex );
    iv_len = unhexify( iv, iv_hex );
    add_len = unhexify( add, add_hex );
    msg_len -= tag_len;
    memcpy( tag, msg + msg_len, tag_len );
 
    if( strcmp( "FAIL", result_hex ) == 0 )
    {
        ret = POLARSSL_ERR_CCM_AUTH_FAILED;
    }
    else
    {
        ret = 0;
        result_len = unhexify( result, result_hex );
    }
 
    TEST_ASSERT( ccm_init( &ctx, cipher_id, key, key_len * 8 ) == 0 );
 
    /* Test with input == output */
    TEST_ASSERT( ccm_auth_decrypt( &ctx, msg_len, iv, iv_len, add, add_len,
                 msg, msg, msg + msg_len, tag_len ) == ret );
 
    if( ret == 0 )
    {
        TEST_ASSERT( memcmp( msg, result, result_len ) == 0 );
    }
    else
    {
        size_t i;
 
        for( i = 0; i < msg_len; i++ )
            TEST_ASSERT( msg[i] == 0 );
    }
 
    /* Check we didn't write past the end (where the original tag is) */
    TEST_ASSERT( memcmp( msg + msg_len, tag, tag_len ) == 0 );
 
exit:
    ccm_free( &ctx );
}
 
 
#endif /* POLARSSL_CCM_C */
 
 
int dep_check( char *str )
{
    if( str == NULL )
        return( 1 );
 
    if( strcmp( str, "POLARSSL_AES_C" ) == 0 )
    {
#if defined(POLARSSL_AES_C)
        return( 0 );
#else
        return( 1 );
#endif
    }
    if( strcmp( str, "POLARSSL_BLOWFISH_C" ) == 0 )
    {
#if defined(POLARSSL_BLOWFISH_C)
        return( 0 );
#else
        return( 1 );
#endif
    }
    if( strcmp( str, "POLARSSL_CAMELLIA_C" ) == 0 )
    {
#if defined(POLARSSL_CAMELLIA_C)
        return( 0 );
#else
        return( 1 );
#endif
    }
 
 
    return( 1 );
}
 
int dispatch_test(int cnt, char *params[50])
{
    int ret;
    ((void) cnt);
    ((void) params);
 
#if defined(TEST_SUITE_ACTIVE)
    if( strcmp( params[0], "ccm_self_test" ) == 0 )
    {
    #ifdef POLARSSL_SELF_TEST
    #ifdef POLARSSL_AES_C
 
 
        if( cnt != 1 )
        {
            fprintf( stderr, "\nIncorrect argument count (%d != %d)\n", cnt, 1 );
            return( 2 );
        }
 
 
        test_suite_ccm_self_test(  );
        return ( 0 );
    #endif /* POLARSSL_SELF_TEST */
    #endif /* POLARSSL_AES_C */
 
        return ( 3 );
    }
    else
    if( strcmp( params[0], "ccm_init" ) == 0 )
    {
 
        int param1;
        int param2;
        int param3;
 
        if( cnt != 4 )
        {
            fprintf( stderr, "\nIncorrect argument count (%d != %d)\n", cnt, 4 );
            return( 2 );
        }
 
        if( verify_int( params[1], &param1 ) != 0 ) return( 2 );
        if( verify_int( params[2], &param2 ) != 0 ) return( 2 );
        if( verify_int( params[3], &param3 ) != 0 ) return( 2 );
 
        test_suite_ccm_init( param1, param2, param3 );
        return ( 0 );
 
        return ( 3 );
    }
    else
    if( strcmp( params[0], "ccm_lengths" ) == 0 )
    {
    #ifdef POLARSSL_AES_C
 
        int param1;
        int param2;
        int param3;
        int param4;
        int param5;
 
        if( cnt != 6 )
        {
            fprintf( stderr, "\nIncorrect argument count (%d != %d)\n", cnt, 6 );
            return( 2 );
        }
 
        if( verify_int( params[1], &param1 ) != 0 ) return( 2 );
        if( verify_int( params[2], &param2 ) != 0 ) return( 2 );
        if( verify_int( params[3], &param3 ) != 0 ) return( 2 );
        if( verify_int( params[4], &param4 ) != 0 ) return( 2 );
        if( verify_int( params[5], &param5 ) != 0 ) return( 2 );
 
        test_suite_ccm_lengths( param1, param2, param3, param4, param5 );
        return ( 0 );
    #endif /* POLARSSL_AES_C */
 
        return ( 3 );
    }
    else
    if( strcmp( params[0], "ccm_encrypt_and_tag" ) == 0 )
    {
 
        int param1;
        char *param2 = params[2];
        char *param3 = params[3];
        char *param4 = params[4];
        char *param5 = params[5];
        char *param6 = params[6];
 
        if( cnt != 7 )
        {
            fprintf( stderr, "\nIncorrect argument count (%d != %d)\n", cnt, 7 );
            return( 2 );
        }
 
        if( verify_int( params[1], &param1 ) != 0 ) return( 2 );
        if( verify_string( &param2 ) != 0 ) return( 2 );
        if( verify_string( &param3 ) != 0 ) return( 2 );
        if( verify_string( &param4 ) != 0 ) return( 2 );
        if( verify_string( &param5 ) != 0 ) return( 2 );
        if( verify_string( &param6 ) != 0 ) return( 2 );
 
        test_suite_ccm_encrypt_and_tag( param1, param2, param3, param4, param5, param6 );
        return ( 0 );
 
        return ( 3 );
    }
    else
    if( strcmp( params[0], "ccm_auth_decrypt" ) == 0 )
    {
 
        int param1;
        char *param2 = params[2];
        char *param3 = params[3];
        char *param4 = params[4];
        char *param5 = params[5];
        int param6;
        char *param7 = params[7];
 
        if( cnt != 8 )
        {
            fprintf( stderr, "\nIncorrect argument count (%d != %d)\n", cnt, 8 );
            return( 2 );
        }
 
        if( verify_int( params[1], &param1 ) != 0 ) return( 2 );
        if( verify_string( &param2 ) != 0 ) return( 2 );
        if( verify_string( &param3 ) != 0 ) return( 2 );
        if( verify_string( &param4 ) != 0 ) return( 2 );
        if( verify_string( &param5 ) != 0 ) return( 2 );
        if( verify_int( params[6], &param6 ) != 0 ) return( 2 );
        if( verify_string( &param7 ) != 0 ) return( 2 );
 
        test_suite_ccm_auth_decrypt( param1, param2, param3, param4, param5, param6, param7 );
        return ( 0 );
 
        return ( 3 );
    }
    else
 
    {
        fprintf( stdout, "FAILED\nSkipping unknown test function '%s'\n", params[0] );
        fflush( stdout );
        return( 1 );
    }
#else
    return( 3 );
#endif
    return( ret );
}
 
int get_line( FILE *f, char *buf, size_t len )
{
    char *ret;
 
    ret = fgets( buf, len, f );
    if( ret == NULL )
        return( -1 );
 
    if( strlen( buf ) && buf[strlen(buf) - 1] == '\n' )
        buf[strlen(buf) - 1] = '\0';
    if( strlen( buf ) && buf[strlen(buf) - 1] == '\r' )
        buf[strlen(buf) - 1] = '\0';
 
    return( 0 );
}
 
int parse_arguments( char *buf, size_t len, char *params[50] )
{
    int cnt = 0, i;
    char *cur = buf;
    char *p = buf, *q;
 
    params[cnt++] = cur;
 
    while( *p != '\0' && p < buf + len )
    {
        if( *p == '\\' )
        {
            p++;
            p++;
            continue;
        }
        if( *p == ':' )
        {
            if( p + 1 < buf + len )
            {
                cur = p + 1;
                params[cnt++] = cur;
            }
            *p = '\0';
        }
 
        p++;
    }
 
    // Replace newlines, question marks and colons in strings
    for( i = 0; i < cnt; i++ )
    {
        p = params[i];
        q = params[i];
 
        while( *p != '\0' )
        {
            if( *p == '\\' && *(p + 1) == 'n' )
            {
                p += 2;
                *(q++) = '\n';
            }
            else if( *p == '\\' && *(p + 1) == ':' )
            {
                p += 2;
                *(q++) = ':';
            }
            else if( *p == '\\' && *(p + 1) == '?' )
            {
                p += 2;
                *(q++) = '?';
            }
            else
                *(q++) = *(p++);
        }
        *q = '\0';
    }
 
    return( cnt );
}
 
int main()
{
    int ret, i, cnt, total_errors = 0, total_tests = 0, total_skipped = 0;
    const char *filename = "/builddir/build/BUILD/polarssl-1.3.9/tests/suites/test_suite_ccm.data";
    FILE *file;
    char buf[5000];
    char *params[50];
 
#if defined(POLARSSL_MEMORY_BUFFER_ALLOC_C)
    unsigned char alloc_buf[1000000];
    memory_buffer_alloc_init( alloc_buf, sizeof(alloc_buf) );
#endif
 
    file = fopen( filename, "r" );
    if( file == NULL )
    {
        fprintf( stderr, "Failed to open\n" );
        return( 1 );
    }
 
    while( !feof( file ) )
    {
        int skip = 0;
 
        if( ( ret = get_line( file, buf, sizeof(buf) ) ) != 0 )
            break;
        fprintf( stdout, "%s%.66s", test_errors ? "\n" : "", buf );
        fprintf( stdout, " " );
        for( i = strlen( buf ) + 1; i < 67; i++ )
            fprintf( stdout, "." );
        fprintf( stdout, " " );
        fflush( stdout );
 
        total_tests++;
 
        if( ( ret = get_line( file, buf, sizeof(buf) ) ) != 0 )
            break;
        cnt = parse_arguments( buf, strlen(buf), params );
 
        if( strcmp( params[0], "depends_on" ) == 0 )
        {
            for( i = 1; i < cnt; i++ )
                if( dep_check( params[i] ) != 0 )
                    skip = 1;
 
            if( ( ret = get_line( file, buf, sizeof(buf) ) ) != 0 )
                break;
            cnt = parse_arguments( buf, strlen(buf), params );
        }
 
        if( skip == 0 )
        {
            test_errors = 0;
            ret = dispatch_test( cnt, params );
        }
 
        if( skip == 1 || ret == 3 )
        {
            total_skipped++;
            fprintf( stdout, "----\n" );
            fflush( stdout );
        }
        else if( ret == 0 && test_errors == 0 )
        {
            fprintf( stdout, "PASS\n" );
            fflush( stdout );
        }
        else if( ret == 2 )
        {
            fprintf( stderr, "FAILED: FATAL PARSE ERROR\n" );
            fclose(file);
            exit( 2 );
        }
        else
            total_errors++;
 
        if( ( ret = get_line( file, buf, sizeof(buf) ) ) != 0 )
            break;
        if( strlen(buf) != 0 )
        {
            fprintf( stderr, "Should be empty %d\n", (int) strlen(buf) );
            return( 1 );
        }
    }
    fclose(file);
 
    fprintf( stdout, "\n----------------------------------------------------------------------------\n\n");
    if( total_errors == 0 )
        fprintf( stdout, "PASSED" );
    else
        fprintf( stdout, "FAILED" );
 
    fprintf( stdout, " (%d / %d tests (%d skipped))\n",
             total_tests - total_errors, total_tests, total_skipped );
 
#if defined(POLARSSL_MEMORY_BUFFER_ALLOC_C)
#if defined(POLARSSL_MEMORY_DEBUG)
    memory_buffer_alloc_status();
#endif
    memory_buffer_alloc_free();
#endif
 
    return( total_errors != 0 );
}