Keycloak adaptor for golang application

Question

I am going to secure my golang application using keycloak, but keycloak itself does not support go language.

There are some go adaptor as an open project in github that

Answer 1

There is also the gocloak library which provides lot's of functionality. The lib is in active development and allready in use in real world projects. So possible bugs & feature requests are being handled.

It provides administration features like "CreateUser","CreateGroup" etc. and also provides functions for Login, Token validation, etc.

For example creating a user is as easy as:

client := gocloak.NewClient("https://mycool.keycloak.instance")
token, err := client.LoginAdmin("user", "password", "realmName")
if err != nil {
    panic("Something wrong with the credentials or url")
}
user := gocloak.User{
    FirstName: "Bob",
    LastName:  "Uncle",
    EMail:     "something@really.wrong",
    Enabled:   true,
    Username:  "CoolGuy",
}
client.CreateUser(token.AccessToken, "realm", user)
if err != nil {
    panic("Oh no!, failed to create user :(")
}

It does also supports Introspecting a Requesting Party Token

client := gocloak.NewClient(hostname)
token, err := client.LoginClient(clientid, clientSecret, realm)
if err != nil {
    panic("Login failed:"+ err.Error())
}

rptResult, err := client.RetrospectToken(token.AccessToken, clientid, clientSecret, realm)
if err != nil {
    panic("Inspection failed:"+ err.Error())
}

if !rptResult.Active {
    panic("Token is not active")
}

permissions := rptResult.Permissions
//Do something with the permissions ;) 

Also to handle easy authentication & token refresh when using echo there is another lib based on gocloak called gocloak-echo. This lib provides handler & middleware to help out, but is still in a more WIP state.

The library also provides decoding of accessTokens into custom claims

Disclosure: I am the (main) author of gocloak, so it's also a little advertising, but in general it answers the question. I had the same problem as the author and i decided to create my own lib (based on the lib of someone else, as stated in the readme on github).