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Overview

The CSLOL DLL License Addendum governs the distribution and use of cslol-dll.dll, the core injection module that enables League of Legends mod installation.
Version 1.1 | Effective: 2026-01-01This policy applies to cslol-dll.dll and all derivative binaries. It takes precedence over the project’s GPL-3.0 license for the DLL specifically.

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Purpose

This policy ensures:
  1. Accountability through public-trust code signing
  2. Technical enforcement against prohibited content (“Skinhacking”)

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For Developers: Distribution Requirements

If you want to redistribute the DLL or use it in your own launcher, you must comply with these requirements:

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1. Code Signing (Mandatory)

You cannot redistribute the DLL with the original League Toolkit signature.
You must:
  • Re-sign the DLL using a publicly trusted code-signing certificate (e.g., DigiCert, Certum)
  • Include a trusted timestamp (RFC 3161) from a trusted timestamp authority
  • Use a certificate that identifies you (organization or individual)

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2. Transparency Requirements

You must publish:
  • Your certificate subject (publisher identity)
  • Certificate SHA-256 fingerprint OR the public certificate chain
  • The DLL’s SHA-256 hash for each release
  • This information should be in your “About” page, documentation, or release notes
The licensor may request the exact signed DLL release artifact to verify compliance.

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3. Anti-Skinhacking Enforcement

You must implement launcher-level blocking to prevent installation/injection of prohibited content.

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Prohibited Content

Your launcher must block: Competitive Integrity Violations:
  • Visual indicators of ability ranges
  • Hitbox visualization
  • Any modifications providing unfair gameplay advantages
Paid Content Replication:
  • Direct replication of purchasable League of Legends skins
  • Content designed to replicate paid cosmetic assets
  • Ports that functionally replicate paid content without substantial transformation

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Permitted Creative Use

Creative derivative works may be allowed when:
  • The content is substantially transformed
  • The work is original in nature
  • The intent is not to replicate purchasable content
  • Proper attribution is provided

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4. Restrictions

You must NOT:
  • Modify, reverse engineer, or patch the DLL
  • Create derivative binaries
  • Bypass or disable technical controls
  • Tamper with the DLL in any way

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Termination

Any violation immediately terminates your permission to distribute the DLL. Upon termination:
  • You must cease all distribution and use
  • You must remove hosted copies under your control

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Enforcement

The League Toolkit Organization may:
  • Submit DMCA takedown notices
  • Pursue legal claims
  • Report violations to Riot Games
  • Cooperate with Riot on enforcement actions

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No Endorsement

Distribution or use of the DLL does not imply endorsement by League Toolkit or Riot Games.No trademark rights are granted.

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Disclaimer

THE DLL IS PROVIDED “AS IS,” WITHOUT WARRANTY OF ANY KIND. The licensor is not liable for any damages arising from the DLL or this policy.

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Full Policy Text

The complete CSLOL DLL License Addendum is available at: LICENSE-CSLOL.md

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Contact

Compliance inquiries: [email protected]

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