06-08-2012
Quote:
Why can't you just modify your original program to send headers?
i have juste the executable so i can't modify my original program
Quote:
But, if it's not your program, how do you know it calls send() once for per data item? What if it packs ten into one send()? Then you'll have to actually process the data yourself in your fake send() call, inserting 10 headers.
i'd like to use for example a library linked to my program , if there is a send or a receive it will redirect it and attach the couple
i want to do like that (i found it in a research)
Quote:
Therefore, we have developed a library which is dynamically loaded by each job using the library interposition mechanism available on Linux
systems during job submission. This mechanism works by initializing the LD PRELOAD environment variable with the desired shared library. Once submitted, all the job are dynamically linked against this library, and all communication-related system calls are redirected. In the used library we
currently redirect all the send() and receive() requests in
order to attach/extract the couple transparently and save it .
9 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
Hi,
I want to know how to send a mail in unix using mailx or mail or sendmail to send a mail with a file attached. I have read the answers from the other threads but I still don't understand. I want to do it in the command line as well as in script.
Can anyone help? DO I need to use... (1 Reply)
Discussion started by: firebirdonfire
1 Replies
2. AIX
Can someone email me a copy of this file? Our AIX 5 cds are at our hotsite and I need a copy to try a fix on a printer.
flyingdutchman1978@gmail.com
Thanks! (0 Replies)
Discussion started by: schism25
0 Replies
3. Shell Programming and Scripting
if test.dat is the file
cat test.dat|uuencode test.dat|mailx -s "subject" mailid
can be used for attaching test.dat
how can i attach more than one file to a mail using mailx (2 Replies)
Discussion started by: anumkoshy
2 Replies
4. Programming
Hii can anyone pls tell how to limit the max no of message in a posix message queue. I have made changes in proc/sys/fs/mqueue/msg_max
But still whenever i try to read the value of max. message in the queue using attr.mq_curmsgs (where struct mq_attr attr) its giving the default value as 10.... (0 Replies)
Discussion started by: mohit3884
0 Replies
5. Shell Programming and Scripting
hi
I know this topic has been discussed a lot in the forum but still couldnt get a exact solution to problem i am facing
I have a CSV file genertaed on Unix box and want to be sent to my email .
mailx -s "TEST" "xyz@hotmail.com" < 1.csv
cat 1.csv | mailx -s "TEST" "xyz@hotmail.com"
... (10 Replies)
Discussion started by: ultimatix
10 Replies
6. Solaris
Hi All,
Can any-one explain me how update on attach works on solaris zones.
Here is the situation .
I am trying to migrate a zones xx-xxx-xxx from Global zone A to Global zone B.
Here is the error message zoneadm is displaying
zoneadm: zone 'xx-xx-xxx': ERROR: attempt to downgrade... (0 Replies)
Discussion started by: rama krishna
0 Replies
7. Programming
Hi,
Code written in C++ got compiled successfully using Sun 4.2 Compiler on Solaris 6. As part of migration, i am using same code and trying to compile using Sun 5.8 C++ compiler(Sun Studio11) on Solaris 10 and could not compile the below line,
outStr.attach(1); // here outStr is declared... (1 Reply)
Discussion started by: shafi2all
1 Replies
8. Emergency UNIX and Linux Support
Hi guys.
I'm studding XEN virtualization with 'The Book Of XEN'. in page 46 it has a statement about how to use xm block-attach command that I don't understand.
here is the command:
xm block-attach 0 tap:aio:/opt/xen/anthony.img /dev/xvda1 w 0and here is sentence:
we are attaching anthony.img... (1 Reply)
Discussion started by: majid.merkava
1 Replies
9. Solaris
Hi All,
I am having trouble with my metadevices and I hope someone can help.
when i try to attach my submirror i get the following error:
root@xxxx>metattach d31 d21
metattach: tbair1: d21: submirror too small to attach
root@xxxx>
However, There is a submirror on the other disk which is... (3 Replies)
Discussion started by: A-Train
3 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)