Looking for a revision control system which allows signatures with X.509 certificates

Question

I am looking for a (distributed) revision control system which allows me to sign commits using X.509 certificates. The systems that I am aware of which allow me to apply a digital signature to a commit (like git, bazaar, mercurial) only work with GnuPG.

One more thing I would be interested in ist to use a hardware token (via a PKCS#11 library) to sign my commits.

Answer 1

Mercurial with CommitsigsExtension:

Embed GnuPG and OpenSSL signatures directly into changesets