Function sha256_self_test

sha256.c:630–722

* Checkup routine */

 * Checkup routine
 */
int sha256_self_test( int verbose )
{
    int i, j, k, buflen, ret = 0;
    unsigned char buf[1024];
    unsigned char sha256sum[32];
    sha256_context ctx;

    sha256_init( &ctx );

    for( i = 0; i < 6; i++ )
    {
        j = i % 3;
        k = i < 3;

        if( verbose != 0 )
            polarssl_printf( "  SHA-%d test #%d: ", 256 - k * 32, j + 1 );

        sha256_starts( &ctx, k );

        if( j == 2 )
        {
            memset( buf, 'a', buflen = 1000 );

            for( j = 0; j < 1000; j++ )
                sha256_update( &ctx, buf, buflen );
        }
        else
            sha256_update( &ctx, sha256_test_buf[j],
                                 sha256_test_buflen[j] );

        sha256_finish( &ctx, sha256sum );

        if( memcmp( sha256sum, sha256_test_sum[i], 32 - k * 4 ) != 0 )
        {
            if( verbose != 0 )
                polarssl_printf( "failed\n" );

            ret = 1;
            goto exit;
        }

        if( verbose != 0 )
            polarssl_printf( "passed\n" );
    }

    if( verbose != 0 )
        polarssl_printf( "\n" );

    for( i = 0; i < 14; i++ )
    {
        j = i % 7;
        k = i < 7;

        if( verbose != 0 )
            polarssl_printf( "  HMAC-SHA-%d test #%d: ", 256 - k * 32, j + 1 );

        if( j == 5 || j == 6 )
        {