I created a new python-3 bitleaker script. It worked on the Dell Inspiron 7579. This script SHOULD work for both SHA1 and SHA256 hashes. I had a machine with SHA256 hashes, but I figured you might be able to try this out and see if it works. I am using a later version of tpm2-tools. It has tpm2_send. You should be able to update to it. It might even get rid of a dependency on that particular version of TPM2.0_TSS because you can install more up to date TPM tools in ubuntu 18.04.
I created a new python-3 bitleaker script. It worked on the Dell Inspiron 7579. This script SHOULD work for both SHA1 and SHA256 hashes. I had a machine with SHA256 hashes, but I figured you might be able to try this out and see if it works. I am using a later version of tpm2-tools. It has tpm2_send. You should be able to update to it. It might even get rid of a dependency on that particular version of TPM2.0_TSS because you can install more up to date TPM tools in ubuntu 18.04.