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Size: 1.48 KB
Versions: 5
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Stored size: 1.48 KB
Contents
# The key, iv and encrypted data are handled in their raw form, with no encoding.
module SymmetricEncryption
class Key
attr_reader :key, :iv, :cipher_name
def initialize(key: :random, iv: :random, cipher_name: "aes-256-cbc")
@key = key == :random ? ::OpenSSL::Cipher.new(cipher_name).random_key : key
@iv = iv == :random ? ::OpenSSL::Cipher.new(cipher_name).random_iv : iv
@cipher_name = cipher_name
end
def encrypt(string)
return if string.nil?
string = string.to_s
return string if string.empty?
# Creates a new OpenSSL::Cipher with every call so that this key instance is thread-safe.
openssl_cipher = ::OpenSSL::Cipher.new(cipher_name)
openssl_cipher.encrypt
openssl_cipher.key = key
openssl_cipher.iv = iv
result = openssl_cipher.update(string)
result << openssl_cipher.final
end
def decrypt(encrypted_string)
return if encrypted_string.nil?
encrypted_string = encrypted_string.to_s
encrypted_string.force_encoding(SymmetricEncryption::BINARY_ENCODING)
return encrypted_string if encrypted_string.empty?
# Creates a new OpenSSL::Cipher with every call so that this key instance is thread-safe.
openssl_cipher = ::OpenSSL::Cipher.new(cipher_name)
openssl_cipher.decrypt
openssl_cipher.key = key
openssl_cipher.iv = iv
result = openssl_cipher.update(encrypted_string)
result << openssl_cipher.final
end
end
end
Version data entries
5 entries across 5 versions & 1 rubygems