[RC] tpm2-pytss 1.0.0-rc1
by Roberts, William C
Hello,
I am pleased to announce the release of the tpm2-pytss (python bindings and utilities) version 1.0.0 RC 1 with the following CHANGELOG over RC0:
## [1.0.0-rc1] - 2022-01-10
### Fixed:
- Misspellings in Code on things like RuntimeError.
- Fix documentation of ESAPI methods and exceptions.
- Double ESAPI.Close call resulting in "Esys_Finalize() Finalizing NULL context."
- type hint for verify_signature was an int, should be a str.
- Parent cdata memory being freed when no parent reference. This causes sub-field references to parent cdata to
be invalid.
- in util method unwrap, fix variable `encdupsens` does not exist, it is `decsens` instead.
### Changed:
- Renamed ESAPI.set_auth to ESAPI.tr_set_auth for consistenency.
- Use None over 0 for default auth_handle.
### Added:
- Check for bad type enum type in ESAPI.load_blob.
- Support for deprecation of `TPM2_RH_PW` in tpm2-tss with proper TPM2_RS_PW attribute.
The release can be found here:
- https://pypi.org/project/tpm2-pytss/1.0.0rc1/
Sorry for the long delay on this RC period, we wanted to make sure we got as much bugs and broken things before the
1.0 release to help minimize breaking changes in the future.
Thanks,
Bill
2 months, 2 weeks
Possible TPM uses in fprintd/libfprint
by Benjamin Berg
Hi,
I was wondering if someone has ideas about integrating the TPM with
Fingerprint readers.
Recently I started looking into supporting Secure Device Connection
Protocol (SDCP, [1]) in libfprint. The general idea is to verify that
the Fingerprint reader can be trusted, but I initially also imagined
that further use-cases like unsealing data in a TPM may be possible
(e.g. to retrieve disk encryption keys).
However, looking into it more, my current conclusion is that there is
little to no advantage to use the TPM. At least not unless one also has
a trusted (userspace) program which is capable of signing TPM
authorizations. One could easily offload the required parts into a
small helper, but that may require ensuring it runs in a trusted
execution environment.
Microsoft seems to run relevant parts as trustlets that are walled off
from the rest of the system. That seems sensible to me, but it also
means requiring all the infrastructure for execution and signing and I
doubt that is feasible currently.
Right now I'll probably go the way of not using the TPM at all. But I
am really not an expert for this. So should someone see scenarios where
a TPM is actually helpful in this context, then I would like to hear
about them.
Benjamin
PS: A quick summary of how SDCP works:
* Device has a private ECC key that signs the firmware and ephemeral
keys during boot (and is inaccessible afterwards)
* A certificate proofs that this key was provisioned in factory
* Device builds a shared secret with the host (s)
* Device sends id, HMAC_SHA256(s, "identify" || nonce || id)
when the finger "id" was presented.
* The HMAC proofs knowledge of the shared secret and authorizes the
print.
[1] https://github.com/microsoft/SecureDeviceConnectionProtocol/wiki/Secure-D...
2 months, 2 weeks
Calculating name of created AK- server side
by kuba.michal.n＠gmail.com
Hello!
I would like to know if it is possible to calculate name of AK generated by host on a remote server? I have read about remote attestation. To ensure the AK matches EK we have to make credential using name of the AK. To achieve this we have to either:
a) calculate name of the AK on server
b) receive name of the AK from host and believe it's a name for a proper AK
Am I missing something?
I have searched for explanation in docs posted on TCG's site, but I just can't find anything useful for nameAlg.
I would be thankful for any help or advice :D
3 months, 1 week
abrmd crashing - how to debug?
by Kenneth Goldman
Ubuntu focal with WSL, abrmd compiled from source
After about 5 minutes of sending commands, abrmd crashes. I originally
found it with keylime, but I can reproduce it with a simple bash loop on
pcrread.
abrmd exits, the tool output is:
** (process:21067): CRITICAL **: 17:25:10.862: failed to allocate dbus
proxy object: Could not connect: Connection refused
WARNING:tcti:src/tss2-tcti/tctildr.c:79:tcti_from_init() TCTI init for
function 0x7ff5f6dbbe10 failed with a0008
WARNING:tcti:src/tss2-tcti/tctildr.c:109:tcti_from_info() Could not
initialize TCTI named: tcti-abrmd
ERROR:tcti:src/tss2-tcti/tctildr-dl.c:154:tcti_from_file() Could not
initialize TCTI file: tabrmd
ERROR:tcti:src/tss2-tcti/tctildr.c:416:Tss2_TctiLdr_Initialize_Ex() Failed
to instantiate TCTI
ERROR: Could not load tcti, got: "tabrmd:bus_name=com.intel.tss2.Tabrmd"
How would I debug?
I would expect that nothing that a single application does should crash
abrmd.
--
Ken Goldman kgoldman(a)us.ibm.com
914-945-2415 (862-2415)
5 months, 1 week
tpm2_flushcontext stuck
by Han
Hi,
I'm using tpm2-tools 5.0 in Debian 11 Bullseye based Raspberry Pi OS. I'm
trying to run tpm2_flushcontext but the command got stuck and it's not
showing anything. Is the data in TPM corrupted? How can I check?
$ sudo tpm2_flushcontext 0x80000000
< no output at all and stuck here >
(note: the handle 0x80000000 was obtained from previous command output when
I was running previous version tpm2-tools 3.1.3 on Debian 10 Buster based
OS:
$ sudo tpm2_createprimary -H o -g sha256 -G ecc -C context.out
ObjectAttribute: 0x00030072
CreatePrimary Succeed ! Handle: 0x80000000)
5 months, 4 weeks
Re-provision TPM
by Anthony Arrascue
Hello,
I am learning about the TSS and TPM techonologies.
I have provisioned the TPM with the default settings, which means I am now using the ECC profile (P_ECCP256SHA256).
However, encryption was a requirement I needed to fulfill. I just didn't know that ECC encryption is currently not supported and now I realize RSA would be a better fit for me.
So here is my question:
* I see there is another profile in /usr/local/etc/tpm2-tss/fapi-profiles, namely P_RSA2048SHA256.json. Is there a way I can encrypt using the RSA profile instead of the ECC one? I tried to re-run tss2_provision, after setting it in fapi-config.json, but it seems this is not the way to proceed. I get the message that the TPM has been already provisioned. What is the correct way of "changing" profile? Is it even possible or do I need to reset the TPM?
Thank you for your help.
Anthony Arrascue
7 months, 1 week
[RELEASE] tpm2-pytss version 1.0.0
by Roberts, William C
Hello,
I am pleased to announce the release of tpm2-pytss version 1.0.0 with the following changelog:
## [1.0.0] - 2022-01-24
### Added
- Bindings to the Enhanced System (ESAPI) API.
- Bindings to the Feature (FAPI) API .
- Bindings to Dynamic TCTI Loading (TCTILdr) API .
- Bindings to Marshalling and Unmarshalling (MU) API.
- Bindings to rc-decode.
- tpm2-tools context file loading support.
- TSS2 PEM format support. This file format is used in OpenSSL Engine and Provider projects.
- Utility routines for: TPM Less Make Credential, sensitive wrapping and unwrapping (import and duplication helpers).
The release can be found in pypi here:
- https://pypi.org/project/tpm2-pytss/1.0.0/
The documentation can be found on "read the docs" here:
- https://tpm2-pytss.readthedocs.io/en/1.0.0/
Thanks,
Bill
8 months
[RELEASE CANDIDATE] tpm2-tss-engine 1.2.0-rc0
by Fuchs, Andreas
Hi everyone,
I just tagged tpm2-tss-engine 1.2.0-rc0 that can be found here: https://github.com/tpm2-software/tpm2-tss-engine/releases/tag/1.2.0-rc0
NOTE: I changed the tag-scheme from v1.1.0 to 1.2.0 (i.e. removed the leading v) in order to use "git describe" during configure.ac
If this breaks anything for you badly, please get in touch.
For convenience, here's the changelog:
### Changed or Fixed
- Updated minimal version of tpm2-tss to 2.4.x
- Fix encoding of emptyauth
- Fix some memory leaks
- Change parent handle to BIGNUM
### Added
- Use of restricted keys for signing
- StirRandom
- Run tests using swtpm
- The ability to import key blobs from things like the tpm2-tools project.
- Compatibility with openssl >=1.1.x
- Support for ECDH
- Fix QNX build issues.
- Only set -Werror for non-release builds.
- Additional checks on TPM responses
- CODE_OF_CONDUCT
Best regards,
Andreas
8 months, 2 weeks
Re: tpm2_nvdefine fails with inconsistent attributes...
by Kenneth Goldman
Correct. Unless you are the platform firmware, you don't typically have access to the platform hierarchy. It's reserved for use of the platform OEM.
Post-OS applications use either the storage or endorsement hierarchy.
From: Steven Clark <davolfman(a)gmail.com>
Sent: Monday, January 10, 2022 4:09 PM
To: Kenneth Goldman <kgoldman(a)us.ibm.com>
Cc: Sievert, James <james.sievert(a)bsci.com>; tpm2 <tpm2(a)lists.01.org>
Subject: [EXTERNAL] Re: [tpm2] Re: tpm2_nvdefine fails with inconsistent attributes...
might also just be attempting to use platform authorization on real hardware while not being the system firmware. UEFI tends to lock out the platform on every boot because that's what it's supposed to do? On Fri, Dec 3, 2021, 6:52 ZjQcmQRYFpfptBannerStart
It might also just be attempting to use platform authorization on real hardware while not being the system firmware. UEFI tends to lock out the platform on every boot because that's what it's supposed to do?
On Fri, Dec 3, 2021, 6:52 AM Kenneth Goldman <kgoldman(a)us.ibm.com<mailto:kgoldman@us.ibm.com>> wrote:
My guess is that you do not set the TPMA_NVA_PLATFORMCREATE attribute.
The IBM utility sets it for you when the platform hierarchy authorizes the command, since it must be set.
--
Ken Goldman kgoldman(a)us.ibm.com<mailto:kgoldman@us.ibm.com>
914-945-2415 (862-2415)
[Inactive hide details for "Sievert, James" ---12/03/2021 09:37:25 AM---Hi, I’m using tpm2-tools 4.1.1 on Ubuntu 20.04. I’m i]"Sievert, James" ---12/03/2021 09:37:25 AM---Hi, I’m using tpm2-tools 4.1.1 on Ubuntu 20.04. I’m issuing the following command which is returnin
From: "Sievert, James" <james.sievert(a)bsci.com<mailto:james.sievert@bsci.com>>
To: "tpm2(a)lists.01.org<mailto:tpm2@lists.01.org>" <tpm2(a)lists.01.org<mailto:tpm2@lists.01.org>>
Date: 12/03/2021 09:37 AM
Subject: [EXTERNAL] [tpm2] tpm2_nvdefine fails with inconsistent attributes...
________________________________
Hi, I’m using tpm2-tools 4.1.1 on Ubuntu 20.04. I’m issuing the following command which is returning an inconsistent attributes error: bsci@ip-10-132-42-225:~$ tpm2_nvdefine 0x1000025 -C p -s 1
Hi,
I’m using tpm2-tools 4.1.1 on Ubuntu 20.04. I’m issuing the following command which is returning an inconsistent attributes error:
bsci@ip-10-132-42-225:~$ tpm2_nvdefine 0x1000025 -C p -s 1
WARNING:esys:src/tss2-esys/api/Esys_NV_DefineSpace.c:333:Esys_NV_DefineSpace_Finish() Received TPM Error
ERROR:esys:src/tss2-esys/api/Esys_NV_DefineSpace.c:122:Esys_NV_DefineSpace() Esys Finish ErrorCode (0x00000182)
ERROR: Failed to define NV area at index 0x1000025
ERROR: Esys_NV_DefineSpace(0x182) - tpm:handle(1):inconsistent attributes
ERROR: Unable to run tpm2_nvdefine
and yes, I am attempting to define the index using the platform hierarchy. ? This does work using the IBM utilities.
Here are the current properties:
bsci@ip-10-132-42-225:~$ tpm2_getcap properties-variable
TPM2_PT_PERSISTENT:
ownerAuthSet: 0
endorsementAuthSet: 0
lockoutAuthSet: 0
reserved1: 0
disableClear: 0
inLockout: 0
tpmGeneratedEPS: 0
reserved2: 0
TPM2_PT_STARTUP_CLEAR:
phEnable: 1
shEnable: 1
ehEnable: 1
phEnableNV: 1
reserved1: 0
orderly: 0
TPM2_PT_HR_NV_INDEX: 0x6
TPM2_PT_HR_LOADED: 0x0
TPM2_PT_HR_LOADED_AVAIL: 0x3
TPM2_PT_HR_ACTIVE: 0x0
TPM2_PT_HR_ACTIVE_AVAIL: 0x40
TPM2_PT_HR_TRANSIENT_AVAIL: 0x3
TPM2_PT_HR_PERSISTENT: 0x0
TPM2_PT_HR_PERSISTENT_AVAIL: 0x11
TPM2_PT_NV_COUNTERS: 0x0
TPM2_PT_NV_COUNTERS_AVAIL: 0xD
TPM2_PT_ALGORITHM_SET: 0x0
TPM2_PT_LOADED_CURVES: 0x2
TPM2_PT_LOCKOUT_COUNTER: 0x0
TPM2_PT_MAX_AUTH_FAIL: 0x20
TPM2_PT_LOCKOUT_INTERVAL: 0x1C20
TPM2_PT_LOCKOUT_RECOVERY: 0x15180
TPM2_PT_AUDIT_COUNTER_0: 0x0
TPM2_PT_AUDIT_COUNTER_1: 0x0
Any insight would be appreciated.
Thanks!_______________________________________________
tpm2 mailing list -- tpm2(a)lists.01.org<mailto:tpm2@lists.01.org>
To unsubscribe send an email to tpm2-leave(a)lists.01.org<mailto:tpm2-leave@lists.01.org>
%(web_page_url)slistinfo%(cgiext)s/%(_internal_name)s
_______________________________________________
tpm2 mailing list -- tpm2(a)lists.01.org<mailto:tpm2@lists.01.org>
To unsubscribe send an email to tpm2-leave(a)lists.01.org<mailto:tpm2-leave@lists.01.org>
%(web_page_url)slistinfo%(cgiext)s/%(_internal_name)s
8 months, 2 weeks
