# Single Sign-On (SSO)

## What is Single Sign-On

If you have accounts of your users in your system - you can effectively provide this data using a JSON Web Token generated on your server to authenticate users on your public roadmap. This mechanism is called Single Sign-On.

## How to generate a token

Here are the instructions on how to generate and use a token for signing in users automatically on your public roadmap or in your widgets

### Get required parameters from your ProdCamp account

* Login to your ProdCamp account (you must be an account administrator)
* Go to the **Settings** page and then to the **Workspace** tab

<div align="center"><img src="https://3223839397-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-M9YH1onkNo4yiuWdB4j%2F-MiOJinRz37TRvTIb8Vv%2F-MiOQVTxnC50shRkopSE%2Fimage.png?alt=media&#x26;token=5154075f-89b0-4734-bda1-540c25f1e4e8" alt=""></div>

* On the **Workspace** tab, there are two important things that you will need to generate a token: **Workspace Id** and **Secret** key. You will need it a bit later in this article.

### Install library

First, you need to install a specific library for working with JWT tokens

{% tabs %}
{% tab title="Node.js" %}

```javascript
npm install --save jsonwebtoken
```

{% endtab %}

{% tab title="C#" %}

```csharp
# Read more here:
https://www.nuget.org/packages/System.IdentityModel.Tokens.Jwt/
```

{% endtab %}

{% tab title="Java" %}

```java
# Read more here:
https://mvnrepository.com/artifact/io.jsonwebtoken/jjwt/0.7.0
```

{% endtab %}

{% tab title="PHP" %}

```php
composer require firebase/php-jwt
```

{% endtab %}

{% tab title="Ruby" %}

```ruby
sudo gem install jwt
```

{% endtab %}

{% tab title="Python" %}

```python
pip install PyJWT
```

{% endtab %}

{% tab title="Go" %}

```go
go get github.com/dgrijalva/jwt-go
```

{% endtab %}
{% endtabs %}

### Generate the token

Copy and insert the **Secret** key from the **Workspace** tab to the SecretKey variable in the snippet. Fill in the user data by providing user email, first name, last name, etc., and the **Workspace Id**. Then encode this data using the secret key like it's shown below:

{% tabs %}
{% tab title="Node.js" %}

```javascript
var jwt = require('jsonwebtoken');

var SecretKey = 'your_secret_key';

function createToken() {
  var userData = {
    avatarUrl: 'user_avatar_url',
    email: 'johndoe@foo.com' // required
    firstName: 'John',
    lastName: 'Doe',
    company: JSON.stringify({
      name: 'Foo Company',
      revenue: 1000
    }),
    workspace_id: '01234567-1c34-1b34-1234-cecb45ab891f' // required
  };
  return jwt.sign(userData, SecretKey, {algorithm: 'HS256'});
}

var token = createToken();
```

{% endtab %}

{% tab title="C#" %}

```csharp
private static string SecretKey = "your_secret_key";

public static string CreateToken()
{
    var securityKey = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(SecretKey));
    var credentials = new SigningCredentials(securityKey, SecurityAlgorithms.HmacSha256Signature);
    var tokenHandler = new JwtSecurityTokenHandler();
// edited on Aug 3, 2023
//  const header = new JwtHeader(credentials);
    var header = new JwtHeader(credentials);
  
    var tokenDescriptor = new SecurityTokenDescriptor
    {
        Subject = new ClaimsIdentity(
            new List<Claim>() {
                new Claim("email", "johndoe@foo.com"), // required
                new Claim("avatarUrl", "user_avatar_url"),
                new Claim("firstName", "John"),
                new Claim("lastName", "Doe"),
                new Claim("company", 
                    // Newtonsoft.Json library usage
                    JsonConvert.SerializeObject(new {
                        Name = "Foo Company",
                        Revenue = 1000
                    })
                ),
                new Claim("workspace_id", "01234567-1c34-1b34-1234-cecb45ab891f") // required
            }
        ),
// edited on Aug 3, 2023
//      SigningCredentials = creds
        SigningCredentials = credentials
    };

    var token = tokenHandler.CreateToken(tokenDescriptor);
    return tokenHandler.WriteToken(token);
}
```

{% endtab %}

{% tab title="Java" %}

```java
import java.util.HashMap;

import io.jsonwebtoken.Jwts;
import io.jsonwebtoken.SignatureAlgorithm;

public class TokenFactory {
  private static final String SecretKey = "your_secret_key";

  public static String createToken() throws Exception {
    HashMap<String, Object> userData = new HashMap<String, Object>();
    
    // new CompanyDTO(companyName, revenue)
    CompanyDTO companyDto = new CompanyDTO("Foo Company", 1000);
    Gson gson = new Gson();
    String companyJson = gson.toJson(companyDto);

    userData.put("email", "johndoe@foo.com"); 
    userData.put("avatarUrl", "user_avatar_url");
    userData.put("firstName", "John");
    userData.put("lastName", "Doe"); 
    userData.put("company", companyJson);
    userData.put("workspace_id", "01234567-1c34-1b34-1234-cecb45ab891f"); // required
    
    return Jwts.builder()
               .setClaims(userData)
               .signWith(SignatureAlgorithm.HS256, SecretKey.getBytes("UTF-8"))
               .compact();
  }
}
```

{% endtab %}

{% tab title="PHP" %}

```php
use \Firebase\JWT\JWT;

$SecretKey = 'your_secret_key';

function createToken() {
  $companyData = [
    'name' => 'Foo Company',
    'revenue' => 1000
  ];
  
  $companyDataJson = json_encode($companyData);

  $userData = [
    'email' => 'johndoe@foo.com', // required
    'avatarUrl' => 'user_avatar_url',
    'firstName' => 'John',
    'lastName' => 'Doe',
    'company' => $companyDataJson,
    'workspace_id' => '01234567-1c34-1b34-1234-cecb45ab891f' // required
  ];
  return JWT::encode($userData, $SecretKey, 'HS256');
}
```

{% endtab %}

{% tab title="Ruby" %}

```ruby
require 'jwt'
require 'json'

SecretKey = 'your_secret_key'

def createToken()
  companyData = {
    name: 'Foo Company',
    revenue: 1000   
  }
  
  userData = {
    email: 'johndoe@foo.com' # required
    avatarUrl: 'user_avatar_url',
    firstName: 'John',
    lastName: 'Doe',
    company: companyData.to_json,
    workspace_id: '01234567-1c34-1b34-1234-cecb45ab891f' # required
  }

  JWT.encode(userData, SecretKey, 'HS256')
end
```

{% endtab %}

{% tab title="Python" %}

```python
import jwt
import json

secret_key = 'your_secret_key'

def create_token():
  company_data = {
    'name': 'Foo Company',
    'revenue': 1000
  }
  
  company_json = json.dumps(company_data)
  
  user_data = {
    'avatarUrl': 'user_avatar_url',
    'email': 'johndoe@foo.com' # required
    'firstName': 'John',
    'lastName': 'Doe',
    'company': company_json
    'workspace_id': '01234567-1c34-1b34-1234-cecb45ab891f' # required
  }
  
  return jwt.encode(user_data, secret_key, algorithm='HS256')
```

{% endtab %}

{% tab title="Go" %}

```go
import (
  "github.com/dgrijalva/jwt-go"
  "encoding/json"
)

const SecretKey = "your_secret_key"

type CompanyData struct {
  Name  string
  Revenue  int
}

func createToken() (string, error) {
  companyData = CompanyData {
    Name: "Foo Company",
    Revenue: 1000
  }
  
  token := jwt.NewWithClaims(jwt.SigningMethodHS256, jwt.MapClaims{
    "avatarUrl": "user_avatar_url",
    "email": "johndoe@foo.com" // required
    "firstName": "John",
    "lastName": "Doe",
    "company": json.Marshal(companyData),
    "workspace_id": '01234567-1c34-1b34-1234-cecb45ab891f' // required
  })
  return token.SignedString([]byte(SecretKey))
}
```

{% endtab %}
{% endtabs %}

## How to use the token to authenticate public roadmap users

After that, you can use the generated token inside the query parameter of a public roadmap URL like **`https://roadmap.prodcamp.com?token={generated_token}`** and provide this link somewhere inside your app to quickly redirect your users to your public roadmap page where they will be automatically authenticated and will have the ability to leave feedback right away.

{% hint style="info" %}
You can also use this token to secure your widgets from any unauthorized access. [Learn more here](https://help.prodcamp.com/widgets/widgets-sso).
{% endhint %}