Question

基本上我正在关注Jumpstart的实验室挑战加密程序，并遇到了一些问题。

这是我的代码

class Encryptor
  def cipher(rotation)
    characters = (' '..'z').to_a
    rotated_characters = characters.rotate(rotation)
    Hash[characters.zip(rotated_characters)]
  end

  def encrypt_letter(letter, rotation)
    cipher_for_rotation = cipher(rotation)
    cipher_for_rotation[letter]
  end

  def encrypt(string, rotation)
    letters = string.split("")

    results = letters.collect do |letter|
        encrypt_letter = encrypt_letter(letter, rotation)
    end

    results.join
  end

  def decrypt_letter(letter, rotation)
    cipher_for_rotation = cipher(rotation)
    reversed_cipher = cipher_for_rotation.to_a.reverse.to_h
    reversed_cipher[letter]
  end

  def decrypt(string, rotation)
    letters = string.split("")

    results = letters.collect do |letter|
        decrypt_letter = decrypt_letter(letter, rotation)
    end

    results.join
  end
end

我的解密方法遇到了困难。以下是从irb

粘贴的以下内容

2.3.0 :001 > load './encryptor.rb'
 => true
2.3.0 :002 > e = Encryptor.new
 => #<Encryptor:0x007fe93a0319b8>
2.3.0 :003 > encrypted = e.encrypt("Hello, World!", 10)
 => "Rovvy6*ay!vn+"
2.3.0 :004 > e.decrypt(encrypted, 10)
 => "\\y%%(@4k(+%x5"

正如您所看到的，在解密我的加密字符串时，它应该输出“Hello，World！”，我用它加密的内容，轮换为10.不要在这里看到我做错了什么，任何帮助将不胜感激。

Answer 1

你可以只查找哈希的密钥。

def decrypt_letter(letter, rotation)
  cipher_for_rotation = cipher(rotation)
  cipher_for_rotation.key(letter)
end

示例：

irb(main):003:0> e = Encryptor.new
=> #<Encryptor:0x007fbcea9b65c8>
irb(main):004:0> enc = e.encrypt "Hello, World!", 10
=> "Rovvy6*ay!vn+"
irb(main):005:0> e.decrypt enc, 10
=> "Hello, World!"

基于旋转的基本加密/解密问题

1 个答案: