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Fedora 18

UEFI Secure Boot Guide

Edition 18.4

Josh Boyer

Fedora Project

Kevin Fenzi

Fedora Project

Peter Jones

Red Hat Install Team

Josh Bressers

Red Hat Product Security Team

Florian Weimer

Red Hat Product Security Team

Edited by

Eric Christensen

Red Hat Product Security Team

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Abstract

Preface
1. Document Conventions
1.1. Typographic Conventions
1.2. Pull-quote Conventions
1.3. Notes and Warnings
2. We Need Feedback!
1. What is UEFI Secure Boot?
1.1. UEFI Secure Boot
1.2. Microsoft Requirements for Secure Boot
1.2.1. Implementation details
1.3. Fedora Secure Boot
1.4. What does Secure Boot protect you from?
1.5. Potential Secure Boot Risks
1.5.1. Forced removal of features in Secure Boot mode
1.5.2. System Transitions out of Secure Boot
1.5.3. No provisioning infrastructure beyond Microsoft Windows
1.5.4. Unproven Revocation Procedures
2. System Configuration
2.1. Entering the UEFI firmware
2.2. Disabling UEFI Secure Boot
2.3. Enabling Microsoft Secure Boot
2.4. Known issues
3. UEFI Secure Boot Implementation
3.1. Keys
3.2. Shim
3.3. GRUB
3.4. Kernel
3.4.1. Restrictions
4. Tools
4.1. Shim
4.2. Pesign
4.3. EFIKeyGen
4.4. sign-file
5. Using your own keys
5.1. Creating keys
5.2. Making keys for shim's build
5.3. Packages that need rebuilding
5.4. Enrolling your keys in firmware
A. Revision History
Index