Hello @ajmalmali
I could not find the CST 3.3.1 file to share, but I find there is a package in Linux that uses this CST version.
To install:
sudo apt install imx-code-signing-tool
And the directories that it will create:
/usr/bin/csf_parser
/usr/bin/cst
/usr/bin/srktool
/usr/share/doc/imx-code-signing-tool/
CST_UG.pdf.gz/usr/share/doc/imx-code-signing-tool/HAB4_API.pdf.gz
/usr/share/doc/imx-code-signing-tool/README.csf_parser
/usr/share/doc/imx-code-signing-tool/changelog.Debian.gz
/usr/share/doc/imx-code-signing-tool/copyright
/usr/share/doc/imx-code-signing-tool/ahab_signature_block_parser/README
/usr/share/doc/imx-code-signing-tool/ahab_signature_block_parser/
common.py/usr/share/doc/imx-code-signing-tool/ahab_signature_block_parser/parse_sig_blk.py
/usr/share/doc/imx-code-signing-tool/hab_srktool_scripts/README
/usr/share/doc/imx-code-signing-tool/hab_srktool_scripts/createSRKFuses
/usr/share/doc/imx-code-signing-tool/hab_srktool_scripts/createSRKTable
/usr/share/doc/imx-code-signing-tool/pki_scripts/add_key.sh
/usr/share/doc/imx-code-signing-tool/pki_scripts/ahab_pki_tree.sh
/usr/share/doc/imx-code-signing-tool/pki_scripts/hab4_pki_tree.sh
/usr/share/lintian/overrides/imx-code-signing-tool
After that, you will have the CST 3.3.1 installed in your Linux machine.
I tried with Ubuntu 22 and it works fine.
Best regards.
Salas.