Generated by SassMeister.com.

SassMeister-input.scss

// ----
// Sass (v3.3.8)
// Compass (v1.0.0.alpha.19)
// SassyBitwise (v1.1.1)
// ----

@import "SassyBitwise";

// Work in progres...

// XOR cipher
// https://en.wikipedia.org/wiki/XOR_cipher


// JavaScript `toString` and `parseInt` implementation in Sass.

@function pow($num, $exp) {
  $result: 1;

  @if $exp > 0 {
    @for $i from 1 through $exp {
      $result: $result * $num;
    }
  }
  @else {
    @for $i from $exp to 0 {
      $result: $result / $num;
    }
  }

  @return $result;
}


@function chars-from-base($base: 10) {
  $chars:(
    // Binary
    2: '01',
    // Octal
    8: '01234567',
    // Decimal
    10: '0123456789',
    // Hexadecimal
    16: '0123456789abcdef',
    // Base 36
    36: '0123456789abcdefghijklmnopqrstuvwxyz',
    // Base 64
    64: 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789/='
  );

  @if not map-has-key($chars, $base) {
    @warn "There is no base `#{$base}` available.";
  }
  @return map-get($chars, $base);
}

@function to-string($num, $radix: 10) {
  $chars: chars-from-base($radix);
  $result: '';
  $sign: '';
  
  @if $num < 0 {
    $sign: '-';
    $num: abs($num);
  }
  
  @if $num >= 0 and $num < $radix {
    @return $sign + str-slice($chars, ($num + 1), ($num + 1));
  }
  
  $q: $num;
  @while $q != 0 {
    $r: $q % $radix;
    $q: floor($q / $radix);
    $result: str-slice($chars, ($r + 1), ($r + 1)) + $result;
  }
  
  @return $sign + $result;
}

@function parse-int($str, $radix: 10) {
  $chars: chars-from-base($radix);
  $result: 0;
  
  $is-negative: str-index($str, '-') == 1;
  
  @if $is-negative {
    $str: str-slice($str, 2);
  }
  
  @for $i from 1 through str-length($str) {
    $char: str-slice($str, -$i, -$i);
    $value: str-index($chars, $char) - 1;
    $result: $result + ($value * pow($radix, ($i - 1)));
  }
  
  @return if($is-negative, -$result, $result);
}


// Get char code from `$str` at `$index` in range [1-52][A-Za-z].
// ––––––––
// @param [string] $str
// @param [number] $index
// ––––––––
// @return [number]

@function char-code-at($str, $index: 1) {
  $chars: 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz';
  @return str-index($chars, str-slice($str, $index, $index));
}


// Get char at `$index` in range [1-52][A-Za-z].
// ––––––––
// @param [number] $index
// ––––––––
// @return [string]

@function from-char-code($index) {
  $chars: 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz';
  @return str-slice($chars, $index, $index);
}



@function key-char-at($key, $index) {
  @return char-code-at($key, floor($index % length($key)));
}

@function xor-encrypt($message, $key) {
  $length: str-length($message);
  $result: '';
  
  @for $i from 1 through $length {
    // $result: $result + bw(char-code-at($message, $i) '^' key-char-at($key, $i));
    $result: $result + to-string(char-code-at($message, $i), 2) + ' ';
  }
  
  @return $result;
}

@function xor-decrypt($message, $key) {
  $length: str-length($message);
  $result: '';
  
  @for $i from 1 through $length {
    $c: parse-int(str-slice($message, $i, $i));
    $result: $result + from-char-code(bw($c '^' key-char-at($key, $i)));
  }
  
  @return $result;
}



xor {
  test: xor-encrypt('A', 'berlin');
  //test: xor-decrypt('40', 'berlin');
  t: to-string(87, 2);
}

SassMeister-output.css

xor {
  test: "1 ";
  t: "1010111";
}