How to generate and send an time stamp request ?

Hi,

today the problem is how to generate and send a time stamp request to a Time Stamp Authority (TSA).

For this quick guide I use free time stamp service (limited to 5 timestamps per day and IP) available on https://tsa.safecreative.org/

Alright, cut the chatter, men. Enjoy!

First we have to create the file you will want to timestamp:

# echo "This is the content of test file." > inputfile.txt

Then generate a timestamp request that we want to sign:

# openssl ts -query -data inputfile.txt -cert -sha256 -no_nonce -out request.tsq

Then send the request to timestamp server

# curl -k  -H "Content-Type: application/timestamp-query" --data-binary @request.tsq "https://tsa.safecreative.org/" > inputfile.txt.tsr

If all it's fine the content of inputfile.txt.tsr is the response of your request.

If you want to verify the content you can do:

# curl -k  -H "Content-Type: application/timestamp-query" --data-binary @request.tsq "https://tsa.safecreative.org/" > inputfile.txt.tsr