Add support for PCR predictions and measured boot #33
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Add PCR-prediction nodes to allow storing expected TPM PCR values in configurations, enabling TPM policy binding where secrets sealed to expected PCR values can only be unsealed when the correct images are loaded. Use the existing signature-node structure to sign the PCR predictions for remote attestation, and document the measured boot algorithm specifying the order in which images are measured: kernel, ramdisk, loadables, fdt (with overlays), and cmdline. Co-developed-by: Claude <[email protected]> Signed-off-by: Simon Glass <[email protected]>
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Add PCR-prediction nodes to allow storing expected TPM PCR values in configurations, enabling TPM policy binding where secrets sealed to expected PCR values can only be unsealed when the correct images are loaded.
Use the existing signature-node structure to sign the PCR predictions for remote attestation, and document the measured boot algorithm specifying the order in which images are measured: kernel, ramdisk, loadables, fdt (with overlays), and cmdline.
Co-developed-by: Claude [email protected]