Merge pull request #48 from auth0-samples/patch/SDK-2879-copy-for-beta

sergiught · web-flow · commit 57e3d31f9d4f · 2021-12-08T12:52:09.000+01:00
SDK-2879 Add copy for beta
diff --git a/.gitignore b/.gitignore
@@ -1,3 +1,5 @@
 .DS_Store
 01-Authorization-RS256/.env
 01-Authorization-RS256/vendor/
+01-Authorization-RS256-BETA/.env
+01-Authorization-RS256-BETA/vendor/
diff --git a/01-Authorization-RS256-BETA/.dockerignore b/01-Authorization-RS256-BETA/.dockerignore
@@ -0,0 +1,3 @@
+README.md
+exec.sh
+exec.ps1
diff --git a/01-Authorization-RS256-BETA/.env.example b/01-Authorization-RS256-BETA/.env.example
@@ -0,0 +1,2 @@
+AUTH0_DOMAIN={DOMAIN}
+AUTH0_AUDIENCE={API_IDENTIFIER}
diff --git a/01-Authorization-RS256-BETA/Dockerfile b/01-Authorization-RS256-BETA/Dockerfile
@@ -0,0 +1,23 @@
+FROM golang:1.17-alpine3.14
+
+# Install git
+RUN apk --update add \
+	git openssl \
+	&& rm /var/cache/apk/*
+
+# Define current working directory
+WORKDIR /01-Authorization-RS256
+
+# Download modules to local cache so we can skip re-
+# downloading on consecutive docker build commands
+COPY go.mod .
+COPY go.sum .
+RUN go mod download
+
+# Add sources
+COPY . .
+
+# Expose port 3010 for our api binary
+EXPOSE 3010
+
+CMD ["go", "run", "main.go"]
diff --git a/01-Authorization-RS256-BETA/README.md b/01-Authorization-RS256-BETA/README.md
@@ -0,0 +1,82 @@
+# [BETA] Golang Authorization for RS256-Signed Tokens
+
+This sample demonstrates how to protect endpoints in a Go API by verifying an incoming JWT access token signed by Auth0.
+The token must be signed with the RS256 algorithm and must be verified against your Auth0 JSON Web Key Set.
+
+Check the [Golang API Quickstart](https://auth0.com/docs/quickstart/backend/golang-beta) to understand this sample better.
+
+## Getting Started
+
+If you haven't already done so, [sign up](https://auth0.com/signup) for your free Auth0 account and create a new API client in the [dashboard](https://manage.auth0.com/).
+
+Clone the repo or download it from the Golang API quickstart page in Auth0's documentation.
+
+### Add Your Credentials
+
+Rename the `.env.example` to `.env` and you will see variables for `AUTH0_DOMAIN` and `AUTH0_API_AUDIENCE`. Update these values with your credentials and save the file.
+
+```text
+AUTH0_DOMAIN={DOMAIN}
+AUTH0_AUDIENCE={API_AUDIENCE}
+```
+
+### Install Dependencies and Start Server
+
+```bash
+# Download dependencies
+go mod vendor
+
+# Start the server
+go run main.go
+```
+
+The API will be served at `http://localhost:3010`.
+
+### Endpoints
+
+The sample includes these endpoints:
+
+**GET** /api/public
+* An unprotected endpoint which returns a message on success. Does not require a valid JWT access token.
+
+**GET** /api/private
+* A protected endpoint which returns a message on success. Requires a valid JWT access token.
+
+**GET** /api/private-scoped
+* A protected endpoint which returns a message on success. Requires a valid JWT access token with a `scope` of `read:messages`.
+
+### Running the Example With Docker
+
+In order to run the example with docker, you need to have `docker` installed.
+
+You also need to set the environment variables as explained [previously](#add-your-credentials).
+
+Execute in command line `sh exec.sh` to run the Docker in Linux, or `.\exec.ps1` to run the Docker in Windows.
+
+## What is Auth0?
+
+Auth0 helps you to:
+
+* Add authentication with [multiple authentication sources](https://docs.auth0.com/identityproviders), either social like **Google, Facebook, Microsoft Account, LinkedIn, GitHub, Twitter, Box, Salesforce, among others**, or enterprise identity systems like **Windows Azure AD, Google Apps, Active Directory, ADFS or any SAML Identity Provider**.
+* Add authentication through more traditional **[username/password databases](https://docs.auth0.com/mysql-connection-tutorial)**.
+* Add support for **[linking different user accounts](https://docs.auth0.com/link-accounts)** with the same user.
+* Support for generating signed [Json Web Tokens](https://docs.auth0.com/jwt) to call your APIs and **flow the user identity** securely.
+* Analytics of how, when and where users are logging in.
+* Pull data from other sources and add it to the user profile, through [JavaScript rules](https://docs.auth0.com/rules).
+
+## Create a free Auth0 account
+
+1. Go to [Auth0](https://auth0.com/signup) and click Sign Up.
+2. Use Google, GitHub or Microsoft Account to login.
+
+## Issue Reporting
+
+If you have found a bug or if you have a feature request, please report them at this repository issues section. Please do not report security vulnerabilities on the public GitHub issue tracker. The [Responsible Disclosure Program](https://auth0.com/whitehat) details the procedure for disclosing security issues.
+
+## Author
+
+[Auth0](https://auth0.com)
+
+## License
+
+This project is licensed under the MIT license. See the `LICENSE` file for more info.
diff --git a/01-Authorization-RS256-BETA/exec.ps1 b/01-Authorization-RS256-BETA/exec.ps1
@@ -0,0 +1,2 @@
+docker build -t auth0-golang-api .
+docker run --env-file .env -p 3010:3010 -it auth0-golang-api
diff --git a/01-Authorization-RS256-BETA/exec.sh b/01-Authorization-RS256-BETA/exec.sh
@@ -0,0 +1,3 @@
+#!/usr/bin/env bash
+docker build -t auth0-golang-api .
+docker run --env-file .env -p 3010:3010 -it auth0-golang-api
diff --git a/01-Authorization-RS256-BETA/go.mod b/01-Authorization-RS256-BETA/go.mod
@@ -0,0 +1,10 @@
+module 01-Authorization-RS256-BETA
+
+go 1.16
+
+require (
+	github.com/auth0/go-jwt-middleware/v2 v2.0.0-beta
+	github.com/gin-contrib/cors v1.3.1
+	github.com/gin-gonic/gin v1.7.4
+	github.com/joho/godotenv v1.4.0
+)
diff --git a/01-Authorization-RS256-BETA/go.sum b/01-Authorization-RS256-BETA/go.sum
@@ -0,0 +1,84 @@
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+github.com/auth0/go-jwt-middleware/v2 v2.0.0-beta/go.mod h1:dWL9pw5FgrzT1Hhmt+D0W8XmDDulGHN3yMMQl1Oq4RM=
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diff --git a/01-Authorization-RS256-BETA/main.go b/01-Authorization-RS256-BETA/main.go
@@ -0,0 +1,23 @@
+package main
+
+import (
+	"log"
+	"net/http"
+
+	"github.com/joho/godotenv"
+
+	"01-Authorization-RS256-BETA/router"
+)
+
+func main() {
+	if err := godotenv.Load(); err != nil {
+		log.Fatalf("Error loading the .env file: %v", err)
+	}
+
+	rtr := router.New()
+
+	log.Print("Server listening on http://localhost:3010")
+	if err := http.ListenAndServe("0.0.0.0:3010", rtr); err != nil {
+		log.Fatalf("There was an error with the http server: %v", err)
+	}
+}
diff --git a/01-Authorization-RS256-BETA/middleware/jwt.go b/01-Authorization-RS256-BETA/middleware/jwt.go
@@ -0,0 +1,88 @@
+package middleware
+
+import (
+	"context"
+	"log"
+	"net/http"
+	"net/url"
+	"os"
+	"strings"
+	"time"
+
+	"github.com/auth0/go-jwt-middleware/v2"
+	"github.com/auth0/go-jwt-middleware/v2/jwks"
+	"github.com/auth0/go-jwt-middleware/v2/validator"
+	"github.com/gin-gonic/gin"
+)
+
+// CustomClaims contains custom data we want from the token.
+type CustomClaims struct {
+	Scope string `json:"scope"`
+}
+
+// Validate does nothing for this example, but we need
+// it to satisfy validator.CustomClaims interface.
+func (c CustomClaims) Validate(ctx context.Context) error {
+	return nil
+}
+
+// HasScope checks whether our claims have a specific scope.
+func (c CustomClaims) HasScope(expectedScope string) bool {
+	result := strings.Split(c.Scope, " ")
+	for i := range result {
+		if result[i] == expectedScope {
+			return true
+		}
+	}
+
+	return false
+}
+
+// EnsureValidToken is a gin.HandlerFunc middleware that will check the validity of our JWT.
+func EnsureValidToken() gin.HandlerFunc {
+	issuerURL, err := url.Parse("https://" + os.Getenv("AUTH0_DOMAIN") + "/")
+	if err != nil {
+		log.Fatalf("Failed to parse the issuer url: %v", err)
+	}
+
+	provider := jwks.NewCachingProvider(issuerURL, 5*time.Minute)
+
+	jwtValidator, err := validator.New(
+		provider.KeyFunc,
+		validator.RS256,
+		issuerURL.String(),
+		[]string{os.Getenv("AUTH0_AUDIENCE")},
+		validator.WithCustomClaims(&CustomClaims{}),
+		validator.WithAllowedClockSkew(time.Minute),
+	)
+	if err != nil {
+		log.Fatalf("Failed to set up the jwt validator")
+	}
+
+	errorHandler := func(w http.ResponseWriter, r *http.Request, err error) {
+		log.Printf("Encountered error while validating JWT: %v", err)
+	}
+
+	middleware := jwtmiddleware.New(
+		jwtValidator.ValidateToken,
+		jwtmiddleware.WithErrorHandler(errorHandler),
+	)
+
+	return func(ctx *gin.Context) {
+		var encounteredError = true
+		var handler http.HandlerFunc = func(w http.ResponseWriter, r *http.Request) {
+			encounteredError = false
+			ctx.Request = r
+			ctx.Next()
+		}
+
+		middleware.CheckJWT(handler).ServeHTTP(ctx.Writer, ctx.Request)
+
+		if encounteredError {
+			ctx.AbortWithStatusJSON(
+				http.StatusUnauthorized,
+				map[string]string{"message": "Failed to validate JWT."},
+			)
+		}
+	}
+}
diff --git a/01-Authorization-RS256-BETA/router/router.go b/01-Authorization-RS256-BETA/router/router.go

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,2 @@`
	`1`	`+AUTH0_DOMAIN={DOMAIN}`
	`2`	`+AUTH0_AUDIENCE={API_IDENTIFIER}`
Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,2 @@`
	`1`	`+docker build -t auth0-golang-api .`
	`2`	`+docker run --env-file .env -p 3010:3010 -it auth0-golang-api`
Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,3 @@`
	`1`	`+#!/usr/bin/env bash`
	`2`	`+docker build -t auth0-golang-api .`
	`3`	`+docker run --env-file .env -p 3010:3010 -it auth0-golang-api`