Sha256: 84fbdecbeb512a4d56e539867a3fa14e36b22aba1ad2e939e8ce11569485edf5
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Versions: 3
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Contents
# frozen_string_literal: true
module Sequel::Plugins::AttrEncrypted::SimpleCrypt
extend self
require "base64"
SEPARATOR = "$"
def encrypt(string, key)
return unless string.is_a?(String) && !string.empty?
encryptor = new_cipher(key, &:encrypt)
iv = encryptor.random_iv
encrypted = encryptor.update(string) + encryptor.final
dump(encrypted, iv, encryptor.auth_tag)
end
def decrypt(string, key)
encrypted, iv, auth_tag = parse(string) if string.is_a?(String)
return if [encrypted, iv, auth_tag].any?(&:nil?)
decryptor = new_cipher(key, &:decrypt)
decryptor.iv = iv
decryptor.auth_tag = auth_tag
decryptor.update(encrypted) + decryptor.final
end
private
def new_cipher(key)
result = OpenSSL::Cipher::AES256.new(:gcm)
yield(result)
result.key = key
result
end
def parse(string)
string.split(SEPARATOR).map { |x| Base64.strict_decode64(x) }
end
def dump(*values)
[*values].map { |x| Base64.strict_encode64(x) }.join(SEPARATOR)
end
end
Version data entries
3 entries across 3 versions & 1 rubygems