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Questions tagged [tpm]

A TPM (Trusted Platform Module) is a security coprocessor found on many PCs

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0answers
69 views

Is Linux able to perform any kind of Measured Boot?

Some Linux-distro's support Secure Boot. (These distro's use a 1st-stage bootloader signed by Microsoft.) Is Linux (without any additional modules) able or is there any Linux-distro out there that is ...
1
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1answer
28 views

Permanently write a value into a PCR register for TPM 1.2

I have system with TPM 1.2 installed on it. Currently, I'm using tpm-tools to initialize this TPM. With the command tpm_extendpcr -p 23 tpm-pcr.key I can write a value into a PCR which works fine. ...
1
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0answers
368 views

Booting problem - A tpm error (7) occurred attempting to read a pcr value

When I try to boot up Linux Mint, it gets stuck at initramsfs with the following error messages: [ 1.892162] tpm tpm0: A tpm error (7) occurred attempting to read a pcr value [ 2.012154] ...
1
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2answers
6k views

ACPI region does not cover the entire command/response buffer

I'm experiencing system freezes and looking in the journal I see kernel (4.14.15-1-MANJARO) errors such as: kernel: tpm_crb MSFT0101:00: [Firmware Bug]: ACPI region does not cover the entire command/...
1
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2answers
336 views

How can I execute tpm2_nvread in the initramfs image created by dracut for centOS 7?

I want to load unlock my LUKS partition (root file system) at boot time using a TPM 2.0. I've had no success using a keyscript=/path/to/script in my /etc/crypttab file, however I made progress using ...
1
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1answer
510 views

How to install tpm_tis.ko for CentOS6

I am attempting to activate and use my TPM module on CentOS6.9 running kernel 2.6.32-696.3.1.el6.x86_64. All the tutorials I've found online start with installing tpm-tools and trousers, which I've ...
7
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1answer
8k views

How to determine if computer has TPM (Trusted Platform Module) available

Wanting to play around with Trusted Platform Module stuff, I installed TrouSerS and tried to start tcsd, but I got this error: TCSD TDDL ERROR: Could not find a device to open! However, my kernel ...
0
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1answer
120 views

Installing on encrypted HDDs

I am trying to install kali linux on one SSD and linux mint on the other SSD. Both instalations are encrypted using LVM encryption. Linux mint works great and also kali linux boots up the first time ...
9
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5answers
40k views

a tpm error (7) occurred attempting to read a pcr value in centos

I'm getting this error while booting and my computer won't start. a tpm error (7) occurred attempting to read a pcr value I installed CentOS 7 on a z400 workstation computer. I was working on it ...
1
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1answer
513 views

TPM (device-id 0x0, rev-id 78)

I'd try to use tpm (trusted platform module) built in my laptop on Debian 8. Most of tpm_* programs gives back answer: root@debian:~# tpm_takeownership Enter owner password: Confirm password: ...
4
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0answers
2k views

Install Linux on Chromebook with failed TPM module?

I have a Samsung XE303C12 Chromebook which apparently has a failed TPM module. It won't boot into ChromeOS, and when I try to recover the OS, I'm told that an error has occurred. I hit Tab and the ...
4
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0answers
463 views

TPM passwordless boot

I'm trying to create device with CentOS6, encrypted disk (with LUKS), TPM module and TrustedGRUB to boot securely and without interaction. I'm following instructions from https://github.com/shpedoikal/...
14
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2answers
2k views

How do I use the TPM to seal away data on an UEFI booted system?

I would like to seal away files on my system using keys stored in the TPM. Since my system uses UEFI to boot, I can no longer use TrustedGrub as a boot loader to maintain my trust chain. Are there any ...
4
votes
2answers
1k views

Why doesn't `head -c 2 /dev/hwrng` work?

I have an Atmel 97SC3201 in my computer and set the following in the kernel: CONFIG_HW_RANDOM_TPM CONFIG_TCG_TPM CONFIG_TCG_ATMEL /dev has tpm0 and hwrng, but running this command returns the ...