Class: RCrypto::CustomEncryptor

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

Class Method Summary collapse

Class Method Details

.decrypt(encrypted_text_with_key) ⇒ Object

Decrypts the given encrypted text using the same steps in reverse



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# File 'lib/RCrypto.rb', line 24

def self.decrypt(encrypted_text_with_key)
  encrypted_text, key = encrypted_text_with_key.split("#", 2)
  stage4 = Decode.remove_fake_token(encrypted_text)
  stage3 = Decode.caesar_cipher_decrypt(stage4, key.bytes.sum % 26)
  stage2 = Decode.base64_custom_decode(stage3)
  original_text = Decode.xor_decrypt(stage2, key[0..15])
  original_text
end

.encrypt(text) ⇒ Object

Encrypts the given text using a series of encryption steps



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# File 'lib/RCrypto.rb', line 13

def self.encrypt(text)
  key = generate_key
  stage1 = Encode.xor_encrypt(text, key[0..15])
  stage2 = Encode.base64_custom_encode(stage1)
  stage3 = Encode.caesar_cipher_encrypt(stage2, key.bytes.sum % 26)
  stage4 = Encode.add_fake_token(stage3)
  final_encrypted = stage4 + "#" + key
  final_encrypted
end

.generate_key ⇒ Object

Generates a random key using MD5 hash



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# File 'lib/RCrypto.rb', line 34

def self.generate_key
  Digest::MD5.hexdigest(SecureRandom.bytes(16))
end