Errors about certificates needed to start sending messages

[PedoneMatteo]

Dear Mr. Denis Filatov,

I am Matteo Pedone, an MSc student at Politecnico di Torino: major in Computer Engineering, minor in CyberSecurity.
I found your repository about the FitSec CAM/DENM message generator very interesting. I am trying to have a look and also to build and run the code. I would like to explain some issues that I faced.
To understand if I am proceeding without errors from the beginning, I list the more relevant steps I did:

• I built the fsmsggen repository and the itscertgen repository, creating a Makefile.am.libasncodec similar to that present in fsmsggen/payload and putting it into the itscertgen/certgen/asncodec path.
• I also cloned the TS.ITS repository, I redefined the path of CERTGEN in the TS.ITS/data/certificates/Makefile and I built it to generate the certificates, xer and temp folders in TS.ITS/data/certificates path.

At this point, I read in your documentation that to start sending messages I need the Root CA, AA, and at least one AT certificate. So I created the folder POOL_CAM in fsmsggen/build/x86_64-linux-gnu-d and for the first time, I filled it with all files in the certificates folder created in TS.ITS/data/certificates and for a second time I filled it with only three files of type .oer, which are three certificates respectively for RCA, AA, and AT, randomly chosen among the certificates created.
I tried to run the command ./fsmsggen -i eth0 -1 ./POOL_CAM.
For the first case, I had the error about the certificate signer unknown and certificate app permission invalid, and when sending the message starts:
1 SEND FinalizeSignedMessage: ERROR: 0x840000BF message certificate time unknown error
For the second one, I had the error about the certificate signer unknown, and when sending the message starts:
1 SEND FinalizeSignedMessage: ERROR: 0x8400000B message certificate not found
For clarity, I attach a file containing these two outputs (./POOL_CAM contains all the files, and ./three_certificates contains only the three ones). outputError_command_fsmsggen.txt
I thought that I had to create and sign manually the certificates, so I moved to /itscertgen/build/x86_64-linux-gnu-d and I ran the command ./certgen -o ./outputCertificates/ CERT_IUT_A_AA.xml CERT_IUT_A_RCA.oer, specifying an output folder, a profile for AA and an RCA certificate as a signer, but I faced to this issue:

root@LAPTOP-0J4A9HTR:~/Project_FsMsGen/itscertgen/build/x86_64-linux-gnu-d# ./certgen -o ./outputCertificates/ CERT_IUT_A_AA.xml CERT_IUT_A_RCA.oer
CERT_IUT_A_AA: failed to load at position 77
  <certificate>
        <version>3</ve

I had this failure with also different files .xml but the files are ok, so I do not understand the error.
I apologize for the long text, I hope that my explanations are complete and easy to understand.
Do not hesitate to tell me if I made some mistakes during the steps that I described before. I need some suggestions or fixes to solve these issues, run the code to start sending messages with proper certificates, without any other errors.
I look forward to hearing from you.

Kind regards,
Matteo Pedone.