Ruby OpenSSL::PKCS5.pbkdf2_hmac_sha1 をPHPで置き換えたときのメモ

def self.encrypt(data, pass, salt)
    cipher = OpenSSL::Cipher::Cipher.new("AES-256-CBC")
    key_iv = OpenSSL::PKCS5.pbkdf2_hmac_sha1(pass, salt, 1000, cipher.key_len+cipher.iv_len)
    key = key_iv[0, cipher.key_len]
    iv  = key_iv[cipher.key_len, cipher.iv_len]
    cipher.encrypt
    cipher.key = key
    cipher.iv = iv
    encryptvalue = cipher.update(data) + cipher.final
    return Base64.b64encode(encryptvalue)
end
  
def self.decrypt(data, pass, salt)
    enctyptvalue = Base64.decode64(data)
    cipher = OpenSSL::Cipher::Cipher.new("AES-256-CBC")
    key_iv = OpenSSL::PKCS5.pbkdf2_hmac_sha1(pass, salt, 1000, cipher.key_len+cipher.iv_len)
    key = key_iv[0, cipher.key_len]
    iv  = key_iv[cipher.key_len, cipher.iv_len]
    cipher.decrypt
    cipher.key = key
    cipher.iv = iv
    cipher.update(enctyptvalue) + cipher.final
end

function encrypt($data, $pass, $salt) {
	$key_iv = openssl_pbkdf2($pass, $salt, 32+16, 1000);
	$key = substr($key_iv, 0, 32);
	$iv  = substr($key_iv, 32, 16);
	$decrypted_text = openssl_encrypt($data, 'AES-256-CBC', $key, 0, $iv);
	return $decrypted_text;
}
function decrypt($data, $pass, $salt) {
	$key_iv = openssl_pbkdf2($pass, $salt, 32+16, 1000);
	$key = substr($key_iv, 0, 32);
	$iv  = substr($key_iv, 32, 16);
	$decrypted_text = openssl_decrypt($data, 'AES-256-CBC', $key, 0, $iv);
	return $decrypted_text;
}