如何将此openssl命令转换为ruby？

require 'openssl'

# openssl命令：openssl enc -aes-256-cbc -salt -in input.txt -out output.txt -pass pass:password

# 输入文件路径
input_file = 'input.txt'
# 输出文件路径
output_file = 'output.txt'
# 密码
password = 'password'

# 读取输入文件内容
input_data = File.read(input_file)

# 创建AES加密器
cipher = OpenSSL::Cipher.new('AES-256-CBC')
cipher.encrypt

# 设置密码和盐值
cipher.key = OpenSSL::PKCS5.pbkdf2_hmac(password, 'salt', 2000, cipher.key_len, OpenSSL::Digest::SHA256.new)
cipher.iv = cipher.random_iv

# 加密数据
encrypted_data = cipher.update(input_data) + cipher.final

# 将加密后的数据写入输出文件
File.open(output_file, 'wb') { |file| file.write(encrypted_data) }

puts '加密完成'