Created
July 12, 2016 08:10
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[Ruby] A simple example of AES encryption in Ruby
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# encoding: utf-8 | |
require "openssl" | |
require "base64" | |
CIPHER_ALGO = "AES-256-CBC" | |
SALT_SIZE = 8 | |
def encrypt(data, pass) | |
salt = OpenSSL::Random.random_bytes(SALT_SIZE) | |
cipher = OpenSSL::Cipher::Cipher.new(CIPHER_ALGO) | |
cipher.encrypt | |
cipher.pkcs5_keyivgen(pass, salt, 1) | |
enc_data = cipher.update(data) + cipher.final | |
salt + enc_data | |
end | |
def decrypt(enc_data, pass) | |
enc_data = enc_data.dup | |
enc_data.force_encoding("ASCII-8BIT") | |
salt = enc_data[0, SALT_SIZE] | |
data = enc_data[SALT_SIZE..-1] | |
cipher = OpenSSL::Cipher::Cipher.new(CIPHER_ALGO) | |
cipher.decrypt | |
cipher.pkcs5_keyivgen(pass, salt, 1) | |
cipher.update(data) + cipher.final | |
end | |
pass = "foobar" | |
data = "ひみつ" | |
enc = encrypt(data, pass) | |
puts Base64.strict_encode64(enc) | |
dec = decrypt(enc, pass) | |
puts dec |
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