Basic Encrypt/Decryption

gistfile1.txt

def aes256_cbc_encrypt(key, data, iv)
  if !(key.bytesize === 32)
    key = Digest::SHA256.digest(key)
  end

  if !(iv.bytesize === 16)
    iv = Digest::MD5.digest(iv)
  end

  #padding = 16 - (data.length % 16)
  #data += (padding.chr * padding)

  cipher = OpenSSL::Cipher::AES256.new(:CBC)
  cipher.encrypt
  cipher.iv = iv
  cipher.key = key
  cipher.update(data) + cipher.final
end

def aes256_cbc_decrypt(key, data, iv)
  if !(key.bytesize === 32)
    key = Digest::SHA256.digest(key)
  end

  if !(iv.bytesize === 16)
    iv = Digest::MD5.digest(iv)
  end

  cipher = OpenSSL::Cipher::AES256.new(:CBC)
  cipher.decrypt
  cipher.iv = iv
  cipher.key = key
  cipher.update(data) + cipher.final
end