Scytale Encryption & Decryption

scytale.js

const column = 5

export const encrypt = (text) => {
  let token = text.split('')
  let rows = token.length / column
  let result = ''

  for (let i = 0; i < column; i++) {
    for (let j = 0; j < rows; j++) {
      if ((j * column) + i < (token.length)) {
        result = result + token[(j * column) + i]
      } else {
        result = result + '*'
      }
    }
  }
  return result
}

export const decrypt = (text) => {
  let token = text.split('')
  let rows = token.length / column
  let result = ''

  for (let j = 0; j < rows; j++) {
    for (let i = 0; i < column; i++) {
      if ((j * column) + i < (token.length)) {
        result = result + token[(i * rows) + j]
      } else {
        result = result + '*'
      }
    }
  }

  return result
}

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