Class: Can::Crypto

Inherits:
Object
  • Object
show all
Defined in:
lib/can/crypto.rb

Constant Summary collapse

CIPHER = 
"AES-256-CBC"

Class Method Summary collapse

Class Method Details

.decrypt(content, password) ⇒ Object 



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# File 'lib/can/crypto.rb', line 26

def self.decrypt(content, password)
  digest = Digest::SHA1.hexdigest(password)
  init, encrypted = content.split("--").map do |v|
    Base64.strict_decode64(v)
  end

  cipher = OpenSSL::Cipher.new(CIPHER)
  cipher.decrypt
  cipher.key = digest[0..31]
  cipher.iv = init

  cipher.update(encrypted) + cipher.final
end

.encrypt(content, password) ⇒ Object 



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# File 'lib/can/crypto.rb', line 10

def self.encrypt(content, password)
  digest = Digest::SHA1.hexdigest(password)
  cipher = OpenSSL::Cipher.new(CIPHER)
  cipher.encrypt
  cipher.key = digest[0..31]
  cipher.iv  = iv = cipher.random_iv
  encrypted  = cipher.update(content) + cipher.final

  binit = Base64.strict_encode64(iv)
  ilen  = binit.length.to_s
  blen  = Base64.strict_encode64(ilen)
  bdata = Base64.strict_encode64(encrypted)
  # blen + "--" + binit + "--" + bdata
  binit + "--" + bdata
end