oidc-idp/README.md

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# CAcert OAuth2 / OpenID Connect IDP
This repository contains an implementation for an identity provider. [ORY
Hydra](https://www.ory.sh/hydra/) is used for the actual OAuth2 / OpenID
Connect operations. The implementation in this repository provides the end user
UI components that are required by Hydra to allow login and consent.
The code in this repository is licensed under the terms of the Apache License
Version 2.0.
Copyright © 2020-2023 Jan Dittberner
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## Setup
### Certificates
You need a set of certificate and private key and a PEM file with CA
certificates used to verify client certificates to run `cacert-idp`.
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An easy way to generate server certificate and key for local testing is
[`mkcert`](https://github.com/FiloSottile/mkcert/releases).
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1. Run `mkcert` to generate `idp.cacert.localhost+1.pem` and
`idp.cacert.localhost+1-key.pem`:
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```shell
mkcert -cert-file idp.cacert.localhost login.cacert.localhost
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```
2. Copy CA certificate for client certificates
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```shell
(curl -s http://www.cacert.org/certs/CAcert_Class3Root_x14E228.crt ; \
curl -s http://www.cacert.org/certs/root_X0F.crt ) > client_ca.pem
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```
### Configure IDP
The Identity Provider application (IDP) requires a strong random key for its
CSRF cookie. You can generate such a key using the following openssl command:
```
openssl rand -base64 32
```
Use this value to create `idp.toml`:
```
[security]
csrf.key = "<32 bytes of base64 encoded data>"
```
## Start
Now you can start the IDP:
```
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make
go run cmd/idp.go
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```
## Translations
This application uses [go-i18n](https://github.com/nicksnyder/go-i18n/) for
internationalization (i18n) support.
The translation workflow needs the `go18n` binary which can be installed via
```
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go install github.com/nicksnyder/go-i18n/v2/goi18n
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```
To extract new messages from the code run
```
goi18n extract .
```
Then use
```
goi18n merge active.*.toml
```
to create TOML files for translation as `translate.<locale>.toml`. After
translating the messages run
```
goi18n merge active.*.toml translate.*.toml
```
to merge the messages back into the active translation files. To add a new
language you need to add the language code to the languages configuration
option (default is defined in the configmap in cmd/idp.go).