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Single Sign On (SSO) Central Authentication Server (CAS) written in Go

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# CASGO CAS Authentication Server

## What is CASGO?

Casgo is a simple to use, simple to deploy [Single Sign On](http://en.wikipedia.org/wiki/Single_sign-on) that uses the [CAS protocol](http://en.wikipedia.org/wiki/Central_Authentication_Service) developed by Shawn Bayern of Yale University.

## CAS Spec

Casgo implements version 1.0 of the [CAS Specification](http://www.yale.edu/tp/cas/specification/CAS%202.0%20Protocol%20Specification%20v1.0.html) as defined with a few key changes:

- JSON is preferred over XML/plaintext responses
- The /validate endpoint behaves as specified in CAS 1.0 (success/failure and the username of the user)
- The /validate endpoint returns user attributes

## Getting started (deploying an instance of Casgo)

0. Install your database of choice (default is [RethinkDB](http://rethinkdb.com), version 2.0+)
1. Download the casgo binary for your operating system
2. Ensure port 443 is open (and your database instance is at the right port, 28015 by default)
3. Run the binary

## Contributing to Casgo (setting up your local development environment)

0. Install your database of choice (default is [RethinkDB](http://rethinkdb.com), version 2.0+)
1. Install [bower](http://bower.io)
2. `bower install`
3. Install [go.rice](https://github.com/GeertJohan/go.rice)
4. `go get github.com/t3hmrman/casgo`
5. `make all` (or `go install`/`go build`)
6. Ensure port 443 is open (and your database instance is at the right port, 28015 by default)
7. `casgo`

NOTE - You may have to add an exception for the included self-signed certificate

You may also find it helpful to install [Gin](https://github.com/codegangsta/gin)

## Running tests

0. (If using RethinkDB) Download the RethinkDB python driver
1. Run `load-test-fixtures.sh` to load a running RethinkDB instance with fixture data.
2. Install [ginkgo](https://github.com/onsi/ginkgo) and [agouti](https://github.com/sclevine/agouti)
3. `ginkgo -r` (from the main casgo directory)

*Note* As some tests rely on the database to be up, RethinkDB must be running.

`make test`

`cd cas && ginkgo -r`

## Options

|Option       |Description                                            |
|-------------|-------------------------------------------------------|
|-config      | Specify a (JSON) configuration file for CasGo to use. |

## Configuration

### By File

Casgo can be configured by file if you specify the `-c/--config <filename>` flag. See **Options** section for a full list of CASGO's command line options.

### By ENV

|Variable (json)          |ENV                  |default                 |description                                        |
|-------------------------|---------------------|------------------------|---------------------------------------------------|
|**host**                 |CASGO_HOST           |"0.0.0.0"               |The host on which to run casgo                     |
|**port**                 |CASGO_PORT           |"8080"                  |The port on which to run casgo                     |
|**dbHost**               |CASGO_DBHOST         |"localhost:28015"       |The hostname of database instance                  |
|**dbName**               |CASGO_DBNAME         |"casgo"                 |The database name for casgo to use                 |
|**templatesDirectory**   |CASGO_TEMPLATES      |"templates/"            |The folder in which casgo templates reside         |
|**companyName**          |CASGO_COMPNAME       |"companyABC"            |The database name for casgo to use                 |
|**authMethod**           |CASGO_DEFAULT_AUTH   |"password"              |The default (user) authentication method for casgo |
|**logLevel**             |CASGO_LOG_LVL        |"WARN|DEBUG|INFO"       |The default log level for casgo                    |
|**tlsCertFile**          |CASGO_TLS_CERT       |"fixtures/ssl/cert.pem" |The TLS cert file that casgo will use              |
|**tlsKeyFile**           |CASGO_TLS_KEY        |"fixtures/ssl/eckey.pem"|The TLS key file that casgo will use               |

### Contributing

0. Fork the repo
1. Follow the instructions for contributing to Casgo
2. Fix issues, make changes
3. Run tests, ensure make targets are functional
4. Pull Request
5. Receive thanks from the community

casgo

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