Merge pull request #1052 from oauth2-proxy/update-linter

Update golangci-lint to latest version (v1.36.0)

.github/workflows/ci.yaml

@@ -14,7 +14,7 @@ jobs:
   build:
     env:
       COVER: true
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-20.04
     steps:
 
     - name: Check out code
@@ -28,7 +28,7 @@ jobs:
 
     - name: Get dependencies
       run: |
-        curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b $(go env GOPATH)/bin v1.24.0
+        curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b $(go env GOPATH)/bin v1.36.0
         go mod download
         curl -L https://codeclimate.com/downloads/test-reporter/test-reporter-latest-linux-amd64 > ./cc-test-reporter
         chmod +x ./cc-test-reporter
@@ -52,7 +52,7 @@ jobs:
         ./.github/workflows/test.sh
 
   docker:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-20.04
     steps:
 
     - name: Check out code

CHANGELOG.md

@@ -8,6 +8,7 @@
 
 ## Changes since v7.0.1
 
+- [#1052](https://github.com/oauth2-proxy/oauth2-proxy/pull/1052) Update golangci-lint to latest version (v1.36.0) (@JoelSpeed)
 - [#1043](https://github.com/oauth2-proxy/oauth2-proxy/pull/1043) Refactor Sign In Page rendering and capture all page rendering code in pagewriter package (@JoelSpeed)
 - [#1029](https://github.com/oauth2-proxy/oauth2-proxy/pull/1029) Refactor error page rendering and allow debug messages on error (@JoelSpeed)
 - [#1028](https://github.com/oauth2-proxy/oauth2-proxy/pull/1028) Refactor templates, update theme and provide styled error pages (@JoelSpeed)

oauthproxy.go

@@ -641,7 +641,7 @@ func (p *OAuthProxy) SignIn(rw http.ResponseWriter, req *http.Request) {
 	}
 }
 
-//UserInfo endpoint outputs session email and preferred username in JSON format
+// UserInfo endpoint outputs session email and preferred username in JSON format
 func (p *OAuthProxy) UserInfo(rw http.ResponseWriter, req *http.Request) {
 
 	session, err := p.getAuthenticatedSession(rw, req)
@@ -805,6 +805,8 @@ func (p *OAuthProxy) redeemCode(req *http.Request) (*sessionsapi.SessionState, e
 func (p *OAuthProxy) enrichSessionState(ctx context.Context, s *sessionsapi.SessionState) error {
 	var err error
 	if s.Email == "" {
+		// TODO(@NickMeves): Remove once all provider are updated to implement EnrichSession
+		// nolint:staticcheck
 		s.Email, err = p.provider.GetEmailAddress(ctx, s)
 		if err != nil && !errors.Is(err, providers.ErrNotImplemented) {
 			return err
@@ -1106,7 +1108,7 @@ func (p *OAuthProxy) getAuthenticatedSession(rw http.ResponseWriter, req *http.R
 // TODO (@NickMeves): This method is a placeholder to be extended but currently
 // fails the linter. Remove the nolint when functionality expands.
 //
-//nolint:S1008
+//nolint:gosimple
 func authOnlyAuthorize(req *http.Request, s *sessionsapi.SessionState) bool {
 	// Allow secondary group restrictions based on the `allowed_groups`
 	// querystring parameter

pkg/validation/options.go

@@ -41,10 +41,10 @@ func Validate(o *options.Options) error {
 	} else if len(o.ProviderCAFiles) > 0 {
 		pool, err := util.GetCertPool(o.ProviderCAFiles)
 		if err == nil {
-			transport := &http.Transport{
+			transport := http.DefaultTransport.(*http.Transport).Clone()
-				TLSClientConfig: &tls.Config{
+			transport.TLSClientConfig = &tls.Config{
-					RootCAs: pool,
+				RootCAs:    pool,
-				},
+				MinVersion: tls.VersionTLS12,
 			}
 
 			http.DefaultClient = &http.Client{Transport: transport}

providers/logingov.go

@@ -3,9 +3,10 @@ package providers
 import (
 	"bytes"
 	"context"
+	"crypto/rand"
 	"crypto/rsa"
 	"fmt"
-	"math/rand"
+	"math/big"
 	"net/url"
 	"time"
 
@@ -34,7 +35,13 @@ var letters = []rune("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ")
 func randSeq(n int) string {
 	b := make([]rune, n)
 	for i := range b {
-		b[i] = letters[rand.Intn(len(letters))]
+		max := big.NewInt(int64(len(letters)))
+		bigN, err := rand.Int(rand.Reader, max)
+		if err != nil {
+			// This should never happen
+			panic(err)
+		}
+		b[i] = letters[bigN.Int64()]
 	}
 	return string(b)
 }

providers/provider_default.go

@@ -94,7 +94,7 @@ func (p *ProviderData) GetLoginURL(redirectURI, state string) string {
 }
 
 // GetEmailAddress returns the Account email address
-// DEPRECATED: Migrate to EnrichSession
+// Deprecated: Migrate to EnrichSession
 func (p *ProviderData) GetEmailAddress(_ context.Context, _ *sessions.SessionState) (string, error) {
 	return "", ErrNotImplemented
 }

providers/providers.go

@@ -9,7 +9,7 @@ import (
 // Provider represents an upstream identity provider implementation
 type Provider interface {
 	Data() *ProviderData
-	// DEPRECATED: Migrate to EnrichSession
+	// Deprecated: Migrate to EnrichSession
 	GetEmailAddress(ctx context.Context, s *sessions.SessionState) (string, error)
 	Redeem(ctx context.Context, redirectURI, code string) (*sessions.SessionState, error)
 	EnrichSession(ctx context.Context, s *sessions.SessionState) error