This post details how I significantly enhanced the double linked list support in GNU-EFI 3.0t.
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This post demonstrates how to use both the new efivarfs filesystem and older efivars mechanism to create, read, write and delete (U)EFI variables. In this post, I dive deep into UEFI Authenticated Variables to show you how UEFI Secure Boot is implemented. I also provide the source code for a simple UEFI utility which outputs information about the X.509 certificates in the Secure Boot keys. In this post I show you how to decode a DER encoded binary X509 certificate and use it to show you the contents of the Microsoft X509 certificate used as the UEFI Secure boot KEK for Windows 8 platforms. In this post, I discuss the new Secure Boot options made available on the Lenovo T430, T430i, T530, and T530i laptops as a result of the 2.05 firmware update. |
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