Verified to be working with: （仅支持2019.4.40f之后的版本，不包括2019.4.40f）

​ (通过Unity Hub安装的Unity一般安装位置在C盘，执行时会遇到操作文件权限不够的情况，建议通过安装包安装)

• 2021.3.23 OSX
• 2022.2.16 Win

Process:

1. Generate keypair and cert with provided openssl.conf. Cert size in DER format must be 1267 bytes
2. Replace cert in Unity.Licensing.EntitlementResolver.dll using HEX editor or patch binary
3. Modify license.xml template to your needs
4. Generate Unity_lic.ulf signed with private key using sign binary
5. ts.go is an implementation of TimeStamp encoder/decoder just in case.

Usage:

• patch /path/to/Unity.Licensing.EntitlementResolver.dll
• sign
• cp Unity_lic.ulf /path/to/license/dir （e.g. C:\ProgramData\Unity）

Block domains in /etc/hosts

# unity
127.0.0.1 license.unity3d.com
127.0.0.1 core.cloud.unity3d.com
127.0.0.1 activation.unity3d.com
127.0.0.1 cdp.cloud.unity3d.com

# this one seems to be optional
# blocking won't allow signing into Unity ID
127.0.0.1 api.unity.com