Class: AesEncryption

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

Constant Summary collapse

STANDARD_BLOCK_SIZE = 
16

Class Method Summary collapse

Class Method Details

.decrypt(key, encrypted_data) ⇒ Object 



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# File 'lib/trustcaptcha/aes_encryption.rb', line 16

def self.decrypt(key, encrypted_data)
  iv = encrypted_data[0, STANDARD_BLOCK_SIZE]
  cipher_text = encrypted_data[STANDARD_BLOCK_SIZE..-1]
  decipher = OpenSSL::Cipher::AES256.new(:CBC)
  decipher.decrypt
  decipher.key = key
  decipher.iv = iv
  decrypted = decipher.update(cipher_text) + decipher.final
  decrypted.force_encoding('UTF-8')
end

.decrypt_to_string(key, encrypted_text) ⇒ Object 



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# File 'lib/trustcaptcha/aes_encryption.rb', line 11

def self.decrypt_to_string(key, encrypted_text)
  decoded = Base64.decode64(encrypted_text)
  decrypt(key, decoded)
end

.to_aes_secret_key(key_string) ⇒ Object 



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# File 'lib/trustcaptcha/aes_encryption.rb', line 7

def self.to_aes_secret_key(key_string)
  Base64.decode64(key_string)
end