A very small utility for making self-signed certificates and private keys using ocaml-x509 and ocaml-nocrypto for key generation. Intended as a (non-drop-in) replacement for these uses of the command-line openssl utility.

Install

certify is now available in opam, a free source-based package manager for OCaml. You can install certify via opam with opam install certify.

Outside of opam:

git clone https://github.com/yomimono/ocaml-certify
cd ocaml-certify
ocaml pkg/pkg.ml build

Binaries will be in _build/src, and you can install them wherever you like, or just use them in place.

Running

For help, try selfsign --help, sign --help, or csr --help.

• selfsign produces a private key and self-signed certificate

• sign takes a certificate signing request, and a CA (key and certificate), and produces a certificate

• csr produces a private key and a certificate signing request

Tests

Simple openssl interoperability tests are in tests/test.sh. Additional tests using american fuzzy lop to test the robustness of sign when given arbitrary data as a CSR are automatically run via bun when certify is installed with opam install -t.