Since this site solved my problems before, I am back for more (solutions)
I down load via a script every day a file that has the same name as the file of the day before. I want to move that file to its own directory like:
/archive/jul30
How do I capture the systems date in a script an... (2 Replies)
Hi All
I was wondering what is the most efficient way to find files in the current directory(that may contain 100,000's files), that meets a certain specified file type and of a certain age.
I have experimented with the find command in unix but it also searches all sub directories. I have... (2 Replies)
Hi, I have a question, is there any way I can, when i create a directory, put the current date on it so that the directory name will be "name-current date"? just curious (3 Replies)
Hi,
Is there a way to zip the content (recursively) of a folder other then the current directory, and keep the directory structure intact?
Example:
/var/tmp/myfolder
----------------- file1
----------------- file2
----------------- folder1
------------------------ file3
Now I want... (3 Replies)
I am preparing a shell script to backup a few config files on a daily basis, with a retention of 30 days. Need some help with syntax/examples:
The shell script (running as cron) would require the following:
1. create a sub-directory within a specified (backup) directory, in the format... (3 Replies)
Hello,
I want to use the string with the current directory in my awk command.
I tried: 'pwd=system("pwd")'
but it doesn't work. can please help somebody? (2 Replies)
Hello All,
I have to write a shell script and use it in informatica. The script has to perform below actions:
The script gets executed from edw user.
Through the script, a DT folder has to be created under edw_sca user.
Is this scenario possible through a SHELL script or not.
... (2 Replies)
The awk below will create sub-directories in a directory (which is always the last line of file1, each block separated by an empty line), if the number in line 2 (always the first 6 digits in the format xx-xxxx) of file2 is found in $2 of file1. This is the current awk output.
If there is a... (0 Replies)
In the below I am trying to create a parent directory using the R_2019 line from f1 if what above it is not empty.
I then create sub-directories under each parent if there is a match between $2 of f1 and $2. Inside each sub-folder the matching paths in $3 and $4 in f2are printed. If there is no... (2 Replies)
In the below bash I am trying to ensure that all folders (represented by $folders) in a given directory are created. In the file f1 the trimmed folder will be there somewhere (will be multiple trimmed folders).
When that trimmed folder is found (represented by $S5) the the contents of $2 printed... (19 Replies)
Discussion started by: cmccabe
19 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)