用于压缩/加密字符串的原生ruby方法？

Question

您是否有任何本机功能（不安装其他gem，或者不从shell调用openssl）来压缩字符串或加密字符串？

有点像mysql compress。

"a very long and loose string".compress
output = "8d20\1l\201"

"8d20\1l\201".decompress
output = "a very long and loose string"?

并同样加密一些字符串？

Answer 1

来自http://ruby-doc.org/stdlib/libdoc/zlib/rdoc/classes/Zlib.html

  # aka compress
  def deflate(string, level)
    z = Zlib::Deflate.new(level)
    dst = z.deflate(string, Zlib::FINISH)
    z.close
    dst
  end

  # aka decompress
  def inflate(string)
    zstream = Zlib::Inflate.new
    buf = zstream.inflate(string)
    zstream.finish
    zstream.close
    buf
  end

http://snippets.dzone.com/posts/show/991加密

require 'openssl'
require 'digest/sha1'
c = OpenSSL::Cipher::Cipher.new("aes-256-cbc")
c.encrypt
# your pass is what is used to encrypt/decrypt
c.key = key = Digest::SHA1.hexdigest("yourpass")
c.iv = iv = c.random_iv
e = c.update("crypt this")
e << c.final
puts "encrypted: #{e}\n"
c = OpenSSL::Cipher::Cipher.new("aes-256-cbc")
c.decrypt
c.key = key
c.iv = iv
d = c.update(e)
d << c.final
puts "decrypted: #{d}\n"

Answer 2

OpenSSL和Zlib。在this question中有一个OpenSSL使用示例。