View Jar Signing
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View jar signing info in NeoForge's mod list
Neoforge is a fork of the Minecraft Forge available for versions 1.20.1+ of Minecraft. Many Forge mods are compatible with Neoforge and vice versa.
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Description
View Jar Signing
This mod enables the ability to view JAR signing info in NeoForge built-in mod list screen.
It is highly recommended that you have some understanding of JAR signing related details, and its caveats in a modding environment.
If you have doubts about a particular signed mod, please verify it using jarsigner beforehand. This mod only exposes the result produced by NeoForge and does not perform any JAR verification.
How to read its output
Only signed mod will have signing information displayed.
Status: self-explanatory [see note]
Leaf signer fingerprint: SHA256 fingerprint for the first signer's leaf certificate.
Signer(s) Format: <CodeSignerN>.<CertificateN> [Type]: <Signer Info> (CertAlg)
CodeSigner- Signer that present in the manifest.Certificate- Certificate in signer's certificate path.Type:CA- Certificate AuthoritySelf- Self-signed.Signer Info: distinguished name information.CertAlg- algorithm name that used to create the certificate.
* will prefixed for each leaf signer's certificate, except for JAR that has only one signer certificate.
By default, only leaf certificate will be shown. Configuration is provided to enable listing of all certificate chain.
Note
This mod mixin and uses some internal NeoForge and SecureJarHandler APIs to obtain, display the signers' certificate details. Therefore, stability of this mod is not guaranteed.
- It only verifies
.classfiles, other files is ignored. - Mod can be modified in runtime and still be valid, since verification take place in actual JAR file.
- Minecraft will always show
Invalidstatus since its installation occurred during install-time.
Background
The display is mostly based on NeoForge's ModListScreen.
It is first introduced in 1.16 but disabled in mod list screen due to it not perform actual checks, shortly after implemented. https://github.com/MinecraftForge/MinecraftForge/issues/7500
In 1.17 onwards, verification of .class is performed. https://github.com/neoforged/NeoForge/blob/1.17.x/fmlloader/src/main/java/net/minecraftforge/fml/loading/moddiscovery/AbstractJarFileLocator.java#L57
In 1.21, it remains unchanged, although it has moved to a different package. https://github.com/neoforged/FancyModLoader/blob/1.21.1/loader/src/main/java/net/neoforged/fml/loading/moddiscovery/ModFile.java#L152-L153
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Default signing details -
All certificate chain With show all certificate chain option enabled
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