mirror of https://github.com/k3s-io/k3s
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
145 lines
6.4 KiB
145 lines
6.4 KiB
# Certificate Transparency: Go Code
|
|
|
|
[](https://travis-ci.org/google/certificate-transparency-go)
|
|
[](https://goreportcard.com/report/github.com/google/certificate-transparency-go)
|
|
[](https://godoc.org/github.com/google/certificate-transparency-go)
|
|
|
|
This repository holds Go code related to
|
|
[Certificate Transparency](https://www.certificate-transparency.org/) (CT). The
|
|
repository requires Go version 1.9.
|
|
|
|
- [Repository Structure](#repository-structure)
|
|
- [Trillian CT Personality](#trillian-ct-personality)
|
|
- [Working on the Code](#working-on-the-code)
|
|
- [Rebuilding Generated Code](#rebuilding-generated-code)
|
|
- [Updating Vendor Code](#updating-vendor-code)
|
|
- [Running Codebase Checks](#running-codebase-checks)
|
|
|
|
## Repository Structure
|
|
|
|
The main parts of the repository are:
|
|
|
|
- Encoding libraries:
|
|
- `asn1/` and `x509/` are forks of the upstream Go `encoding/asn1` and
|
|
`crypto/x509` libraries. We maintain separate forks of these packages
|
|
because CT is intended to act as an observatory of certificates across the
|
|
ecosystem; as such, we need to be able to process somewhat-malformed
|
|
certificates that the stricter upstream code would (correctly) reject.
|
|
Our `x509` fork also includes code for working with the
|
|
[pre-certificates defined in RFC 6962](https://tools.ietf.org/html/rfc6962#section-3.1).
|
|
- `tls` holds a library for processing TLS-encoded data as described in
|
|
[RFC 5246](https://tools.ietf.org/html/rfc5246).
|
|
- `x509util` provides additional utilities for dealing with
|
|
`x509.Certificate`s.
|
|
- CT client libraries:
|
|
- The top-level `ct` package (in `.`) holds types and utilities for working
|
|
with CT data structures defined in
|
|
[RFC 6962](https://tools.ietf.org/html/rfc6962).
|
|
- `client/` and `jsonclient/` hold libraries that allow access to CT Logs
|
|
via entrypoints described in
|
|
[section 4 of RFC 6962](https://tools.ietf.org/html/rfc6962#section-4).
|
|
- `scanner/` holds a library for scanning the entire contents of an existing
|
|
CT Log.
|
|
- Command line tools:
|
|
- `./client/ctclient` allows interaction with a CT Log
|
|
- `./scanner/scanlog` allows an existing CT Log to be scanned for certificates
|
|
of interest; please be polite when running this tool against a Log.
|
|
- `./x509util/certcheck` allows display and verification of certificates
|
|
- `./x509util/crlcheck` allows display and verification of certificate
|
|
revocation lists (CRLs).
|
|
- CT Personality for [Trillian](https://github.com/google/trillian):
|
|
- `trillian/` holds code that allows a Certificate Transparency Log to be
|
|
run using a Trillian Log as its back-end -- see
|
|
[below](#trillian-ct-personality).
|
|
|
|
|
|
## Trillian CT Personality
|
|
|
|
The `trillian/` subdirectory holds code and scripts for running a CT Log based
|
|
on the [Trillian](https://github.com/google/trillian) general transparency Log.
|
|
|
|
The main code for the CT personality is held in `trillian/ctfe`; this code
|
|
responds to HTTP requests on the
|
|
[CT API paths](https://tools.ietf.org/html/rfc6962#section-4) and translates
|
|
them to the equivalent gRPC API requests to the Trillian Log.
|
|
|
|
This obviously relies on the gRPC API definitions at
|
|
`github.com/google/trillian`; the code also uses common libraries from the
|
|
Trillian project for:
|
|
- exposing monitoring and statistics via an `interface` and corresponding
|
|
Prometheus implementation (`github.com/google/trillian/monitoring/...`)
|
|
- dealing with cryptographic keys (`github.com/google/trillian/crypto/...`).
|
|
|
|
The `trillian/integration/` directory holds scripts and tests for running the whole
|
|
system locally. In particular:
|
|
- `trillian/integration/ct_integration_test.sh` brings up local processes
|
|
running a Trillian Log server, signer and a CT personality, and exercises the
|
|
complete set of RFC 6962 API entrypoints.
|
|
- `trillian/integration/ct_hammer_test.sh` brings up a complete system and runs
|
|
a continuous randomized test of the CT entrypoints.
|
|
|
|
These scripts require a local database instance to be configured as described
|
|
in the [Trillian instructions](https://github.com/google/trillian#mysql-setup).
|
|
|
|
|
|
## Working on the Code
|
|
|
|
Developers who want to make changes to the codebase need some additional
|
|
dependencies and tools, described in the following sections. The
|
|
[Travis configuration](.travis.yml) for the codebase is also useful reference
|
|
for the required tools and scripts, as it may be more up-to-date than this
|
|
document.
|
|
|
|
### Rebuilding Generated Code
|
|
|
|
Some of the CT Go code is autogenerated from other files:
|
|
|
|
- [Protocol buffer](https://developers.google.com/protocol-buffers/) message
|
|
definitions are converted to `.pb.go` implementations.
|
|
- A mock implementation of the Trillian gRPC API (in `trillian/mockclient`) is
|
|
created with [GoMock](https://github.com/golang/mock).
|
|
|
|
Re-generating mock or protobuffer files is only needed if you're changing
|
|
the original files; if you do, you'll need to install the prerequisites:
|
|
|
|
- `mockgen` tool from https://github.com/golang/mock
|
|
- `protoc`, [Go support for protoc](https://github.com/golang/protobuf) (see
|
|
documentation linked from the
|
|
[protobuf site](https://github.com/google/protobuf))
|
|
|
|
and run the following:
|
|
|
|
```bash
|
|
go generate -x ./... # hunts for //go:generate comments and runs them
|
|
```
|
|
|
|
### Updating Vendor Code
|
|
|
|
The codebase includes a couple of external projects under the `vendor/`
|
|
subdirectory, to ensure that builds use a fixed version (typically because the
|
|
upstream repository does not guarantee back-compatibility between the tip
|
|
`master` branch and the current stable release). See
|
|
[instructions in the Trillian repo](https://github.com/google/trillian#updating-vendor-code)
|
|
for how to update vendored subtrees.
|
|
|
|
|
|
### Running Codebase Checks
|
|
|
|
The [`scripts/presubmit.sh`](scripts/presubmit.sh) script runs various tools
|
|
and tests over the codebase.
|
|
|
|
```bash
|
|
# Install gometalinter and all linters
|
|
go get -u github.com/alecthomas/gometalinter
|
|
gometalinter --install
|
|
|
|
# Run code generation, build, test and linters
|
|
./scripts/presubmit.sh
|
|
|
|
# Run build, test and linters but skip code generation
|
|
./scripts/presubmit.sh --no-generate
|
|
|
|
# Or just run the linters alone:
|
|
gometalinter --config=gometalinter.json ./...
|
|
```
|