Thanks a TON Neo for GREAT work. I hope we will get more users attracted by this system and moreover we will get more motivation to achieve these badges.
Thanks,
R. Singh
It was your idea... so now finally your vision is coming true. Thanks for the great idea!
Just created my first prototype badge for user post count. Needs work....
PHP:
HTML (JS):
Please help me with the posts thresholds and colors for this badge!
I need to "un-hardcode" the colors and add Bootstrap color classes instead.
I have read a document which tells me the following 4 things are done by the RAM embedded on disk driver controller. But I don't know what's difference between buffer and cache. Thanks!
RAM on disk drive controllers
1 firmware
2 speed matching buffer
3 prefetching buffer
4 cache (1 Reply)
Happy New Year!
There are currently four UNIX.COM achievement awards up for grabs, as the say. Here they are, in no particular order:
The Order of the Raven
The Order of the Hippo
The Order of the Spider
The Order of the Dragon
Don't ask me what they mean, or who who will get those... (0 Replies)
Dear All,
Here is the current status of the badging system:
The Beta 1 phase of the new badging system is close to completion.
42 prototype badges have been "allocated"
6 prototype badge slots are held in reserve
The "alert you have new badges" prototype is running and is currently... (4 Replies)
Here is the current array of the short description of badges for the new prototype badging system (Beta 1) with 42 icons allocated (prototype logic written) and 6 reserved (for future use);
<?php
$badges_desc = array(
"fauser" => "Total Post Count",
"faaward" => "First Post",
... (6 Replies)
Dear All,
We have a lot of amazing moderators and other very talented unix.com members who provide tireless top quality free technical support assistance to others. As a service to those long term unix.com members, I am making a new Patreon BBCODE badge available which can be posted in forum... (8 Replies)
Another major upgrade on the new UserCP today. I have created the "My Badges" page in the new control panel, and it's looking very cool :)
If you have visited the new UserCP recently, you will more-than-likely need to close your browser (completely) and then restart it to clear out the old... (2 Replies)
Discussion started by: Neo
2 Replies
LEARN ABOUT CENTOS
tpm_quote_tools
TPM QUOTE TOOLS(8) TPM QUOTE TOOLS(8)NAME
TPM Quote Tools
PROGRAMS
tpm_mkuuid, tpm_mkaik, tpm_loadkey, tpm_unloadkey, tpm_getpcrhash, tpm_updatepcrhash, tpm_getquote, tpm_verifyquote
DESCRIPTION
TPM Quote Tools is a collection of programs that provide support for TPM based attestation using the TPM quote operation.
A TPM contains a set of Platform Configuration Registers (PCRs). In a well configured machine, some of these registers are set to known
values during the boot up process or at other times. For example, a PCR might contain the hash of a boot loader in memory before it is
run.
The TPM quote operation is used to authoritatively verify the contents of a TPM's Platform Configuration Registers (PCRs). During provi-
sioning, a composite hash of a selected set of PCRs is computed. The TPM quote operation produces a composite hash that can be compared
with the one computed while provisioning.
To use the TPM quote operation, keys must be generated. During provisioning, an Attestation Identity Key (AIK) is generated for each TPM,
and the public part of the key is made available to entities that validate quotes.
The TPM quote operation returns signed data and a signature. The data that is signed contains the PCRs selected for the operation, the
composite hash for the selected PCRs, and a nonce provided as input, and used to prevent replay attacks. At provisioning time, the data
that is signed is stored, not just the composite hash. The signature is discarded.
An entity that wishes to evaluate a machine generates a nonce, and sends it along with the set of PCR used to generate the composite PCR
hash at provisioning time. For this use of the TPM quote operation, the signed data is ignored, and the signature returned is used to val-
idate the state of the TPM's PCRs. Given the signature, the evaluating entity replaces the nonce in the signed data generated at provi-
sioning time, and checks to see if the signature is valid for the data. If so, this check ensures the selected PCRs contain values that
match the ones measured during provisioning.
A typical scenario for an enterprise using these tools follows. The tools expect AIKs to be referenced via one enterprise-wide Universally
Unique Identifier (UUID). The program tpm_mkuuid creates one.
For each machine being checked, an AIK is created using tpm_mkaik. The key blob produced is bound to the UUID on its machine using
tpm_loadkey. The public key associated with the AIK is sent to the entities that verify quotes. Finally, the expected PCR composite hash
is obtained using tpm_getpcrhash. When the expected PCR values change, a new hash can be generated with tpm_updatepcrhash.
The program to obtain a quote, and thus measure the current state of the PCRs is tpm_getquote. The program that verifies the quote
describes the same PCR composite hash as was measured initially is tpm_verifyquote.
SEE ALSO tpm_mkuuid(8), tpm_mkaik(8), tpm_loadkey(8), tpm_unloadkey(8), tpm_getpcrhash(8), tpm_updatepcrhash(8), tpm_getquote(8), tpm_verifyquote(8)
Oct 2010 TPM QUOTE TOOLS(8)