Re: [PATCH 11/13] kernel: Enable support for TPM hardware

[Adolf Belka <adolf.belka@ipfire.org>]

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Hi Michael,

After a bit more searching around I don't think I have TPM capability on my systems.

Regards,

Adolf.

On 21/09/2021 13:40, Adolf Belka wrote:
> Hi Michael,
>
> On 21/09/2021 11:50, Michael Tremer wrote:
>> Hello,
>>
>>> On 18 Sep 2021, at 17:15, Peter Müller <peter.mueller(a)ipfire.org> wrote:
>>>
>>> Hello Michael,
>>> hello *,
>>>
>>> just a small comment for the records: As discussed in the last monthly telephone
>>> conference (https://wiki.ipfire.org/devel/telco/2021-09-06), we will use a TPM only
>>> for HWRNG purposes. Nothing else will depend on it, as there is nothing relevant
>>> left to be locked down in IPFire thanks to enforced kernel module signing.
>> Does anyone have any hardware at grabs to verify that this works?
>>
>> rngd —-list should list the TPM device as a potential source.
>
> On my running system I got the following response to the command:-
>
> Entropy sources that are available but disabled
> 1: TPM RNG Device (tpm)
> 4: NIST Network Entropy Beacon (nist)
> Available and enabled entropy sources:
> 2: Intel RDRAND Instruction RNG (rdrand)
> Available entropy sources that failed initalization:
> 0: Hardware RNG Device (hwrng)
>
>
> and on my VM testbed system I got the same message:-
>
> Entropy sources that are available but disabled
> 1: TPM RNG Device (tpm)
> 4: NIST Network Entropy Beacon (nist)
> Available and enabled entropy sources:
> 2: Intel RDRAND Instruction RNG (rdrand)
> Available entropy sources that failed initalization:
> 0: Hardware RNG Device (hwrng)
>
> I suspect that available but disabled means that I would need to turn it on in the bios. Is that a correct assumption?
>
> To test it I presume that I need to copy the changes into the kernel config for the architecture I am using and also need to reboot.
>
> Once I have the changers in place how do I tell if it is working?
>
> Regards,
>
> Adolf.
>
>>> So no user needs to worry about introducing TPM support coming with a lack of
>>> digital sovereignty - that is, if something like this even exits on today's hardware. :-)
>>>
>>> Acked-by: Peter Müller <peter.mueller(a)ipfire.org>
>>>
>>> Thanks, and best regards,
>>> Peter Müller
>>>
>>>
>>>> Signed-off-by: Michael Tremer <michael.tremer(a)ipfire.org>
>>>> ---
>>>>   config/kernel/kernel.config.aarch64-ipfire | 15 ++++++++++++++-
>>>>   config/kernel/kernel.config.armv6l-ipfire  | 12 +++++++++++-
>>>>   config/kernel/kernel.config.i586-ipfire    | 16 +++++++++++++++-
>>>>   config/kernel/kernel.config.x86_64-ipfire  | 17 ++++++++++++++++-
>>>>   4 files changed, 56 insertions(+), 4 deletions(-)
>>>> diff --git a/config/kernel/kernel.config.aarch64-ipfire b/config/kernel/kernel.config.aarch64-ipfire
>>>> index aa34b64db..49ee85970 100644
>>>> --- a/config/kernel/kernel.config.aarch64-ipfire
>>>> +++ b/config/kernel/kernel.config.aarch64-ipfire
>>>> @@ -3422,7 +3422,19 @@ CONFIG_DEVMEM=y
>>>>   CONFIG_RAW_DRIVER=y
>>>>   CONFIG_MAX_RAW_DEVS=8192
>>>>   CONFIG_DEVPORT=y
>>>> -# CONFIG_TCG_TPM is not set
>>>> +CONFIG_TCG_TPM=m
>>>> +CONFIG_HW_RANDOM_TPM=y
>>>> +CONFIG_TCG_TIS_CORE=m
>>>> +CONFIG_TCG_TIS=m
>>>> +CONFIG_TCG_TIS_I2C_ATMEL=m
>>>> +CONFIG_TCG_TIS_I2C_INFINEON=m
>>>> +CONFIG_TCG_TIS_I2C_NUVOTON=m
>>>> +CONFIG_TCG_ATMEL=m
>>>> +CONFIG_TCG_INFINEON=m
>>>> +CONFIG_TCG_CRB=m
>>>> +CONFIG_TCG_VTPM_PROXY=m
>>>> +CONFIG_TCG_TIS_ST33ZP24=m
>>>> +CONFIG_TCG_TIS_ST33ZP24_I2C=m
>>>>   # CONFIG_XILLYBUS is not set
>>>>   # end of Character devices
>>>>   @@ -7271,6 +7283,7 @@ CONFIG_IO_WQ=y
>>>>   CONFIG_KEYS=y
>>>>   # CONFIG_KEYS_REQUEST_CACHE is not set
>>>>   # CONFIG_PERSISTENT_KEYRINGS is not set
>>>> +# CONFIG_TRUSTED_KEYS is not set
>>>>   # CONFIG_ENCRYPTED_KEYS is not set
>>>>   # CONFIG_KEY_DH_OPERATIONS is not set
>>>>   CONFIG_SECURITY_DMESG_RESTRICT=y
>>>> diff --git a/config/kernel/kernel.config.armv6l-ipfire b/config/kernel/kernel.config.armv6l-ipfire
>>>> index 7b82e87df..b11a179e3 100644
>>>> --- a/config/kernel/kernel.config.armv6l-ipfire
>>>> +++ b/config/kernel/kernel.config.armv6l-ipfire
>>>> @@ -3463,7 +3463,16 @@ CONFIG_DEVMEM=y
>>>>   CONFIG_RAW_DRIVER=y
>>>>   CONFIG_MAX_RAW_DEVS=8192
>>>>   CONFIG_DEVPORT=y
>>>> -# CONFIG_TCG_TPM is not set
>>>> +CONFIG_TCG_TPM=m
>>>> +CONFIG_HW_RANDOM_TPM=y
>>>> +CONFIG_TCG_TIS_CORE=m
>>>> +CONFIG_TCG_TIS=m
>>>> +CONFIG_TCG_TIS_I2C_ATMEL=m
>>>> +CONFIG_TCG_TIS_I2C_INFINEON=m
>>>> +CONFIG_TCG_TIS_I2C_NUVOTON=m
>>>> +CONFIG_TCG_VTPM_PROXY=m
>>>> +CONFIG_TCG_TIS_ST33ZP24=m
>>>> +CONFIG_TCG_TIS_ST33ZP24_I2C=m
>>>>   # CONFIG_XILLYBUS is not set
>>>>   # end of Character devices
>>>>   @@ -7366,6 +7375,7 @@ CONFIG_IO_WQ=y
>>>>   CONFIG_KEYS=y
>>>>   # CONFIG_KEYS_REQUEST_CACHE is not set
>>>>   # CONFIG_PERSISTENT_KEYRINGS is not set
>>>> +# CONFIG_TRUSTED_KEYS is not set
>>>>   # CONFIG_ENCRYPTED_KEYS is not set
>>>>   # CONFIG_KEY_DH_OPERATIONS is not set
>>>>   CONFIG_SECURITY_DMESG_RESTRICT=y
>>>> diff --git a/config/kernel/kernel.config.i586-ipfire b/config/kernel/kernel.config.i586-ipfire
>>>> index 90d4ac856..2d7158c96 100644
>>>> --- a/config/kernel/kernel.config.i586-ipfire
>>>> +++ b/config/kernel/kernel.config.i586-ipfire
>>>> @@ -3449,7 +3449,21 @@ CONFIG_DEVPORT=y
>>>>   CONFIG_HPET=y
>>>>   # CONFIG_HPET_MMAP is not set
>>>>   CONFIG_HANGCHECK_TIMER=m
>>>> -# CONFIG_TCG_TPM is not set
>>>> +CONFIG_TCG_TPM=m
>>>> +CONFIG_HW_RANDOM_TPM=y
>>>> +CONFIG_TCG_TIS_CORE=m
>>>> +CONFIG_TCG_TIS=m
>>>> +CONFIG_TCG_TIS_I2C_ATMEL=m
>>>> +CONFIG_TCG_TIS_I2C_INFINEON=m
>>>> +CONFIG_TCG_TIS_I2C_NUVOTON=m
>>>> +CONFIG_TCG_NSC=m
>>>> +CONFIG_TCG_ATMEL=m
>>>> +CONFIG_TCG_INFINEON=m
>>>> +CONFIG_TCG_XEN=m
>>>> +CONFIG_TCG_CRB=m
>>>> +CONFIG_TCG_VTPM_PROXY=m
>>>> +CONFIG_TCG_TIS_ST33ZP24=m
>>>> +CONFIG_TCG_TIS_ST33ZP24_I2C=m
>>>>   # CONFIG_TELCLOCK is not set
>>>>   # CONFIG_XILLYBUS is not set
>>>>   # end of Character devices
>>>> diff --git a/config/kernel/kernel.config.x86_64-ipfire b/config/kernel/kernel.config.x86_64-ipfire
>>>> index fe93d731c..65014f41a 100644
>>>> --- a/config/kernel/kernel.config.x86_64-ipfire
>>>> +++ b/config/kernel/kernel.config.x86_64-ipfire
>>>> @@ -3413,7 +3413,21 @@ CONFIG_DEVPORT=y
>>>>   CONFIG_HPET=y
>>>>   # CONFIG_HPET_MMAP is not set
>>>>   CONFIG_HANGCHECK_TIMER=m
>>>> -# CONFIG_TCG_TPM is not set
>>>> +CONFIG_TCG_TPM=m
>>>> +CONFIG_HW_RANDOM_TPM=y
>>>> +CONFIG_TCG_TIS_CORE=m
>>>> +CONFIG_TCG_TIS=m
>>>> +CONFIG_TCG_TIS_I2C_ATMEL=m
>>>> +CONFIG_TCG_TIS_I2C_INFINEON=m
>>>> +CONFIG_TCG_TIS_I2C_NUVOTON=m
>>>> +CONFIG_TCG_NSC=m
>>>> +CONFIG_TCG_ATMEL=m
>>>> +CONFIG_TCG_INFINEON=m
>>>> +CONFIG_TCG_XEN=m
>>>> +CONFIG_TCG_CRB=m
>>>> +CONFIG_TCG_VTPM_PROXY=m
>>>> +CONFIG_TCG_TIS_ST33ZP24=m
>>>> +CONFIG_TCG_TIS_ST33ZP24_I2C=m
>>>>   # CONFIG_TELCLOCK is not set
>>>>   # CONFIG_XILLYBUS is not set
>>>>   # end of Character devices
>>>> @@ -6746,6 +6760,7 @@ CONFIG_IO_WQ=y
>>>>   CONFIG_KEYS=y
>>>>   # CONFIG_KEYS_REQUEST_CACHE is not set
>>>>   # CONFIG_PERSISTENT_KEYRINGS is not set
>>>> +# CONFIG_TRUSTED_KEYS is not set
>>>>   # CONFIG_ENCRYPTED_KEYS is not set
>>>>   # CONFIG_KEY_DH_OPERATIONS is not set
>>>>   CONFIG_SECURITY_DMESG_RESTRICT=y