feat(authn-oidc): allow for dynamic post-logout redirection

Dockerfile

@@ -28,7 +28,9 @@ RUN /src/dist/bouncer_linux_amd64_v1/bouncer -c '' config dump > /src/dist/bounc
     && yq -i '.redis.adresses = ["redis:6379"]' /src/dist/bouncer_linux_amd64_v1/config.yml \
     && yq -i '.redis.writeTimeout = "30s"' /src/dist/bouncer_linux_amd64_v1/config.yml \
     && yq -i '.redis.readTimeout = "30s"' /src/dist/bouncer_linux_amd64_v1/config.yml \
-    && yq -i '.redis.dialTimeout = "30s"' /src/dist/bouncer_linux_amd64_v1/config.yml
+    && yq -i '.redis.dialTimeout = "30s"' /src/dist/bouncer_linux_amd64_v1/config.yml \
+    && yq -i '.bootstrap.lockTimeout = "30s"' /src/dist/bouncer_linux_amd64_v1/config.yml \
+    && yq -i '.integrations.kubernetes.lockTimeout = "30s"' /src/dist/bouncer_linux_amd64_v1/config.yml
 
 FROM reg.cadoles.com/proxy_cache/library/alpine:3.19.1 AS RUNTIME
 
@@ -46,6 +48,7 @@ RUN ln -s /usr/share/bouncer/bin/bouncer /usr/local/bin/bouncer
 
 EXPOSE 8080
 EXPOSE 8081
+EXPOSE 8082
 
 RUN adduser -D -H bouncer
 

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+
+15. Disclaimer of Warranty.
+
+THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+16. Limitation of Liability.
+
+IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+17. Interpretation of Sections 15 and 16.
+
+If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+To do so, attach the following notices to the program. It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+If your software can interact with users remotely through a computer
+network, you should also make sure that it provides a way for users to
+get its source. For example, if your program is a web application, its
+interface could display a "Source" link that leads users to an archive
+of the code. There are many ways you could offer source, and different
+solutions will be better for different programs; see section 13 for the
+specific requirements.
+
+You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU AGPL, see
+<https://www.gnu.org/licenses/>.

go.mod

@@ -131,7 +131,7 @@ require (
 	github.com/urfave/cli/v2 v2.25.3
 	github.com/xrash/smetrics v0.0.0-20201216005158-039620a65673 // indirect
 	gitlab.com/wpetit/goweb v0.0.0-20240226160244-6b2826c79f88
-	golang.org/x/crypto v0.19.0 // indirect
+	golang.org/x/crypto v0.19.0
 	golang.org/x/mod v0.14.0 // indirect
 	golang.org/x/sys v0.17.0 // indirect
 	golang.org/x/term v0.17.0 // indirect

internal/admin/bootstrap.go

@@ -65,7 +65,7 @@ func (s *Server) bootstrapProxies(ctx context.Context) error {
 
 			for layerName, layerConfig := range proxyConfig.Layers {
 				layerType := store.LayerType(layerConfig.Type)
-				layerOptions := store.LayerOptions(layerConfig.Options)
+				layerOptions := store.LayerOptions(layerConfig.Options.Data)
 
 				if _, err := layerRepo.CreateLayer(ctx, proxyName, layerName, layerType, layerOptions); err != nil {
 					return errors.WithStack(err)
@@ -109,7 +109,7 @@ func (s *Server) validateBootstrap(ctx context.Context) error {
 			}
 
 			rawOptions := func(opts config.InterpolatedMap) map[string]any {
-				return opts
+				return opts.Data
 			}(layerConf.Options)
 
 			if err := schema.Validate(ctx, layerOptionsSchema, rawOptions); err != nil {

internal/config/environment.go

@@ -101,33 +101,66 @@ func (ib *InterpolatedBool) UnmarshalYAML(value *yaml.Node) error {
 	return nil
 }
 
-type InterpolatedMap map[string]interface{}
+type InterpolatedMap struct {
+	Data   map[string]any
+	getEnv func(string) string
+}
 
 func (im *InterpolatedMap) UnmarshalYAML(value *yaml.Node) error {
-	var data map[string]interface{}
+	var data map[string]any
 
 	if err := value.Decode(&data); err != nil {
 		return errors.Wrapf(err, "could not decode value '%v' (line '%d') into map", value.Value, value.Line)
 	}
 
-	for key, value := range data {
-		strVal, ok := value.(string)
-		if !ok {
-			continue
+	if im.getEnv == nil {
+		im.getEnv = os.Getenv
 	}
 
-		if match := reVar.FindStringSubmatch(strVal); len(match) > 0 {
-			strVal = os.Getenv(match[1])
+	interpolated, err := im.interpolateRecursive(data)
+	if err != nil {
+		return errors.WithStack(err)
 	}
 
-		data[key] = strVal
-	}
-
-	*im = data
+	im.Data = interpolated.(map[string]any)
 
 	return nil
 }
 
+func (im *InterpolatedMap) interpolateRecursive(data any) (any, error) {
+	switch typ := data.(type) {
+	case map[string]any:
+		for key, value := range typ {
+			value, err := im.interpolateRecursive(value)
+			if err != nil {
+				return nil, errors.WithStack(err)
+			}
+
+			typ[key] = value
+		}
+
+	case string:
+		value, err := envsubst.Eval(typ, im.getEnv)
+		if err != nil {
+			return nil, errors.WithStack(err)
+		}
+
+		data = value
+
+	case []any:
+		for idx := range typ {
+			value, err := im.interpolateRecursive(typ[idx])
+			if err != nil {
+				return nil, errors.WithStack(err)
+			}
+
+			typ[idx] = value
+		}
+	}
+
+	return data, nil
+}
+
 type InterpolatedStringSlice []string
 
 func (iss *InterpolatedStringSlice) UnmarshalYAML(value *yaml.Node) error {

internal/config/environment_test.go

@@ -0,0 +1,82 @@
+package config
+
+import (
+	"fmt"
+	"os"
+	"testing"
+
+	"github.com/pkg/errors"
+	"gopkg.in/yaml.v3"
+)
+
+func TestInterpolatedMap(t *testing.T) {
+	type testCase struct {
+		Path   string
+		Env    map[string]string
+		Assert func(t *testing.T, parsed InterpolatedMap)
+	}
+
+	testCases := []testCase{
+		{
+			Path: "testdata/environment/interpolated-map-1.yml",
+			Env: map[string]string{
+				"TEST_PROP1":      "foo",
+				"TEST_SUB_PROP1":  "bar",
+				"TEST_SUB2_PROP1": "baz",
+			},
+			Assert: func(t *testing.T, parsed InterpolatedMap) {
+				if e, g := "foo", parsed.Data["prop1"]; e != g {
+					t.Errorf("parsed.Data[\"prop1\"]: expected '%v', got '%v'", e, g)
+				}
+
+				if e, g := "bar", parsed.Data["sub"].(map[string]any)["subProp1"]; e != g {
+					t.Errorf("parsed.Data[\"sub\"][\"subProp1\"]: expected '%v', got '%v'", e, g)
+				}
+
+				if e, g := "baz", parsed.Data["sub2"].(map[string]any)["sub2Prop1"].([]any)[0]; e != g {
+					t.Errorf("parsed.Data[\"sub2\"][\"sub2Prop1\"][0]: expected '%v', got '%v'", e, g)
+				}
+
+				if e, g := "test", parsed.Data["sub2"].(map[string]any)["sub2Prop1"].([]any)[1]; e != g {
+					t.Errorf("parsed.Data[\"sub2\"][\"sub2Prop1\"][1]: expected '%v', got '%v'", e, g)
+				}
+			},
+		},
+		{
+			Path: "testdata/environment/interpolated-map-2.yml",
+			Env: map[string]string{
+				"BAR": "bar",
+			},
+			Assert: func(t *testing.T, parsed InterpolatedMap) {
+				if e, g := "http://bar", parsed.Data["foo"]; e != g {
+					t.Errorf("parsed.Data[\"foo\"]: expected '%v', got '%v'", e, g)
+				}
+			},
+		},
+	}
+
+	for idx, tc := range testCases {
+		t.Run(fmt.Sprintf("Case #%d", idx), func(t *testing.T) {
+			data, err := os.ReadFile(tc.Path)
+			if err != nil {
+				t.Fatalf("%+v", errors.WithStack(err))
+			}
+
+			var interpolatedMap InterpolatedMap
+
+			if tc.Env != nil {
+				interpolatedMap.getEnv = func(key string) string {
+					return tc.Env[key]
+				}
+			}
+
+			if err := yaml.Unmarshal(data, &interpolatedMap); err != nil {
+				t.Fatalf("%+v", errors.WithStack(err))
+			}
+
+			if tc.Assert != nil {
+				tc.Assert(t, interpolatedMap)
+			}
+		})
+	}
+}

internal/config/layers.go

@@ -15,6 +15,12 @@ func NewDefaultLayersConfig() LayersConfig {
 		},
 		Authn: AuthnLayerConfig{
 			TemplateDir: "./layers/authn/templates",
+			OIDC: AuthnOIDCLayerConfig{
+				HTTPClient: AuthnOIDCHTTPClientConfig{
+					TransportConfig: NewDefaultTransportConfig(),
+					Timeout:         NewInterpolatedDuration(10 * time.Second),
+				},
+			},
 		},
 	}
 }
@@ -26,4 +32,14 @@ type QueueLayerConfig struct {
 
 type AuthnLayerConfig struct {
 	TemplateDir InterpolatedString   `yaml:"templateDir"`
+	OIDC        AuthnOIDCLayerConfig `yaml:"oidc"`
+}
+
+type AuthnOIDCLayerConfig struct {
+	HTTPClient AuthnOIDCHTTPClientConfig `yaml:"httpClient"`
+}
+
+type AuthnOIDCHTTPClientConfig struct {
+	TransportConfig
+	Timeout *InterpolatedDuration `yaml:"timeout"`
 }

internal/config/metrics.go

@@ -17,9 +17,9 @@ func (c *BasicAuthConfig) CredentialsMap() map[string]string {
 		return map[string]string{}
 	}
 
-	credentials := make(map[string]string, len(*c.Credentials))
+	credentials := make(map[string]string, len(c.Credentials.Data))
 
-	for k, v := range *c.Credentials {
+	for k, v := range c.Credentials.Data {
 		credentials[k] = fmt.Sprintf("%v", v)
 	}
 

internal/config/proxy_server.go

@@ -1,6 +1,10 @@
 package config
 
-import "time"
+import (
+	"crypto/tls"
+	"net/http"
+	"time"
+)
 
 type ProxyServerConfig struct {
 	HTTP      HTTPConfig      `yaml:"http"`
@@ -25,6 +29,33 @@ type TransportConfig struct {
 	WriteBufferSize        InterpolatedInt       `yaml:"writeBufferSize"`
 	ReadBufferSize         InterpolatedInt       `yaml:"readBufferSize"`
 	MaxResponseHeaderBytes InterpolatedInt       `yaml:"maxResponseHeaderBytes"`
+	InsecureSkipVerify     InterpolatedBool      `yaml:"insecureSkipVerify"`
+}
+
+func (c TransportConfig) AsTransport() *http.Transport {
+	httpTransport := http.DefaultTransport.(*http.Transport).Clone()
+
+	httpTransport.Proxy = http.ProxyFromEnvironment
+	httpTransport.ForceAttemptHTTP2 = bool(c.ForceAttemptHTTP2)
+	httpTransport.MaxIdleConns = int(c.MaxIdleConns)
+	httpTransport.MaxIdleConnsPerHost = int(c.MaxIdleConnsPerHost)
+	httpTransport.MaxConnsPerHost = int(c.MaxConnsPerHost)
+	httpTransport.IdleConnTimeout = time.Duration(*c.IdleConnTimeout)
+	httpTransport.TLSHandshakeTimeout = time.Duration(*c.TLSHandshakeTimeout)
+	httpTransport.ExpectContinueTimeout = time.Duration(*c.ExpectContinueTimeout)
+	httpTransport.DisableKeepAlives = bool(c.DisableKeepAlives)
+	httpTransport.DisableCompression = bool(c.DisableCompression)
+	httpTransport.ResponseHeaderTimeout = time.Duration(*c.ResponseHeaderTimeout)
+	httpTransport.WriteBufferSize = int(c.WriteBufferSize)
+	httpTransport.ReadBufferSize = int(c.ReadBufferSize)
+	httpTransport.MaxResponseHeaderBytes = int64(c.MaxResponseHeaderBytes)
+
+	if httpTransport.TLSClientConfig == nil {
+		httpTransport.TLSClientConfig = &tls.Config{}
+	}
+	httpTransport.TLSClientConfig.InsecureSkipVerify = bool(c.InsecureSkipVerify)
+
+	return httpTransport
 }
 
 func NewDefaultProxyServerConfig() ProxyServerConfig {
@@ -69,5 +100,6 @@ func NewDefaultTransportConfig() TransportConfig {
 		ReadBufferSize:         4096,
 		WriteBufferSize:        4096,
 		MaxResponseHeaderBytes: 0,
+		InsecureSkipVerify:     false,
 	}
 }

internal/config/testdata/environment/interpolated-map-1.yml

@@ -0,0 +1,6 @@
+prop1: "${TEST_PROP1}"
+prop2: 1
+sub:
+  subProp1: "${TEST_SUB_PROP1}"
+sub2:
+  sub2Prop1: ["${TEST_SUB2_PROP1}", "test"]

internal/config/testdata/environment/interpolated-map-2.yml

@@ -0,0 +1 @@
+foo: http://${BAR}

internal/proxy/director/layer/authn/layer-options.json

@@ -43,5 +43,6 @@
                 }
             }
         }
-    }
+    },
+    "additionalProperties": false
 }

internal/proxy/director/layer/authn/network/authenticator.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"net"
 	"net/http"
+	"strings"
 
 	"forge.cadoles.com/cadoles/bouncer/internal/proxy/director/layer/authn"
 	"forge.cadoles.com/cadoles/bouncer/internal/store"
@@ -49,10 +50,16 @@ func (a *Authenticator) Authenticate(w http.ResponseWriter, r *http.Request, lay
 }
 
 func (a *Authenticator) matchAnyAuthorizedCIDRs(ctx context.Context, remoteHostPort string, CIDRs []string) (bool, error) {
-	remoteHost, _, err := net.SplitHostPort(remoteHostPort)
+	var remoteHost string
+	if strings.Contains(remoteHostPort, ":") {
+		var err error
+		remoteHost, _, err = net.SplitHostPort(remoteHostPort)
 		if err != nil {
 			return false, errors.WithStack(err)
 		}
+	} else {
+		remoteHost = remoteHostPort
+	}
 
 	remoteAddr := net.ParseIP(remoteHost)
 	if remoteAddr == nil {

internal/proxy/director/layer/authn/network/authenticator_test.go

@@ -0,0 +1,60 @@
+package network
+
+import (
+	"context"
+	"fmt"
+	"testing"
+
+	"github.com/pkg/errors"
+)
+
+func TestMatchAuthorizedCIDRs(t *testing.T) {
+
+	type testCase struct {
+		RemoteHostPort  string
+		AuthorizedCIDRs []string
+		ExpectedResult  bool
+		ExpectedError   error
+	}
+
+	testCases := []testCase{
+		{
+			RemoteHostPort: "192.168.1.15",
+			AuthorizedCIDRs: []string{
+				"192.168.1.0/24",
+			},
+			ExpectedResult: true,
+		},
+		{
+			RemoteHostPort: "192.168.1.15:43349",
+			AuthorizedCIDRs: []string{
+				"192.168.1.0/24",
+			},
+			ExpectedResult: true,
+		},
+		{
+			RemoteHostPort: "192.168.1.15:43349",
+			AuthorizedCIDRs: []string{
+				"192.168.1.5/32",
+			},
+			ExpectedResult: false,
+		},
+	}
+
+	auth := Authenticator{}
+	ctx := context.Background()
+
+	for idx, tc := range testCases {
+		t.Run(fmt.Sprintf("Case #%d", idx), func(t *testing.T) {
+			result, err := auth.matchAnyAuthorizedCIDRs(ctx, tc.RemoteHostPort, tc.AuthorizedCIDRs)
+
+			if g, e := result, tc.ExpectedResult; e != g {
+				t.Errorf("result: expected '%v', got '%v'", e, g)
+			}
+
+			if e, g := tc.ExpectedError, err; !errors.Is(err, tc.ExpectedError) {
+				t.Errorf("err: expected '%v', got '%v'", e, g)
+			}
+		})
+	}
+}

internal/proxy/director/layer/authn/oidc/authenticator.go

@@ -1,11 +1,18 @@
 package oidc
 
 import (
+	"bytes"
 	"context"
+	"crypto/tls"
 	"fmt"
 	"net/http"
 	"net/url"
+	"slices"
+	"strings"
+	"text/template"
+	"time"
 
+	"forge.cadoles.com/Cadoles/go-proxy/wildcard"
 	"forge.cadoles.com/cadoles/bouncer/internal/proxy/director"
 	"forge.cadoles.com/cadoles/bouncer/internal/proxy/director/layer/authn"
 	"forge.cadoles.com/cadoles/bouncer/internal/store"
@@ -18,6 +25,8 @@ import (
 
 type Authenticator struct {
 	store             sessions.Store
+	httpTransport     *http.Transport
+	httpClientTimeout time.Duration
 }
 
 func (a *Authenticator) PreAuthentication(w http.ResponseWriter, r *http.Request, layer *store.Layer) error {
@@ -38,16 +47,30 @@ func (a *Authenticator) PreAuthentication(w http.ResponseWriter, r *http.Request
 		logger.Error(ctx, "could not retrieve session", logger.E(errors.WithStack(err)))
 	}
 
-	redirectURL := a.getRedirectURL(layer.Proxy, layer.Name, originalURL, options)
-	logoutURL := a.getLogoutURL(layer.Proxy, layer.Name, originalURL, options)
-
-	client, err := a.getClient(options, redirectURL.String())
+	loginCallbackURL, err := a.getLoginCallbackURL(originalURL, layer.Proxy, layer.Name, options)
 	if err != nil {
 		return errors.WithStack(err)
 	}
 
-	switch r.URL.Path {
-	case redirectURL.Path:
+	client, err := a.getClient(options, loginCallbackURL.String())
+	if err != nil {
+		return errors.WithStack(err)
+	}
+
+	loginCallbackPathPattern, err := a.templatize(options.OIDC.MatchLoginCallbackPath, layer.Proxy, layer.Name)
+	if err != nil {
+		return errors.WithStack(err)
+	}
+
+	logoutPathPattern, err := a.templatize(options.OIDC.MatchLogoutPath, layer.Proxy, layer.Name)
+	if err != nil {
+		return errors.WithStack(err)
+	}
+
+	logger.Debug(ctx, "checking url", logger.F("loginCallbackPathPattern", loginCallbackPathPattern), logger.F("logoutPathPattern", logoutPathPattern))
+
+	switch {
+	case wildcard.Match(originalURL.Path, loginCallbackPathPattern):
 		if err := client.HandleCallback(w, r, sess); err != nil {
 			return errors.WithStack(err)
 		}
@@ -57,11 +80,24 @@ func (a *Authenticator) PreAuthentication(w http.ResponseWriter, r *http.Request
 			metricLabelProxy: string(layer.Proxy),
 		}).Add(1)
 
-	case logoutURL.Path:
-		postLogoutRedirectURL := options.OIDC.PostLogoutRedirectURL
-		if options.OIDC.PostLogoutRedirectURL == "" {
+	case wildcard.Match(originalURL.Path, logoutPathPattern):
+		postLogoutRedirectURL := r.URL.Query().Get("redirect")
+
+		if postLogoutRedirectURL != "" {
+			isAuthorized := slices.Contains(options.OIDC.PostLogoutRedirectURLs, postLogoutRedirectURL)
+			if !isAuthorized {
+				http.Error(w, "unauthorized post-logout redirect", http.StatusBadRequest)
+				return errors.WithStack(authn.ErrSkipRequest)
+			}
+		}
+
+		if postLogoutRedirectURL == "" {
+			if options.OIDC.PublicBaseURL != "" {
+				postLogoutRedirectURL = options.OIDC.PublicBaseURL
+			} else {
 				postLogoutRedirectURL = originalURL.Scheme + "://" + originalURL.Host
 			}
+		}
 
 		if err := client.HandleLogout(w, r, sess, postLogoutRedirectURL); err != nil {
 			return errors.WithStack(err)
@@ -80,11 +116,6 @@ func (a *Authenticator) PreAuthentication(w http.ResponseWriter, r *http.Request
 func (a *Authenticator) Authenticate(w http.ResponseWriter, r *http.Request, layer *store.Layer) (*authn.User, error) {
 	ctx := r.Context()
 
-	originalURL, err := director.OriginalURL(ctx)
-	if err != nil {
-		return nil, errors.WithStack(err)
-	}
-
 	options, err := fromStoreOptions(layer.Options)
 	if err != nil {
 		return nil, errors.WithStack(err)
@@ -117,14 +148,27 @@ func (a *Authenticator) Authenticate(w http.ResponseWriter, r *http.Request, lay
 		sess.Options.SameSite = http.SameSiteDefaultMode
 	}
 
-	redirectURL := a.getRedirectURL(layer.Proxy, layer.Name, originalURL, options)
-
-	client, err := a.getClient(options, redirectURL.String())
+	originalURL, err := director.OriginalURL(ctx)
 	if err != nil {
 		return nil, errors.WithStack(err)
 	}
 
-	idToken, err := client.Authenticate(w, r, sess)
+	loginCallbackURL, err := a.getLoginCallbackURL(originalURL, layer.Proxy, layer.Name, options)
+	if err != nil {
+		return nil, errors.WithStack(err)
+	}
+
+	client, err := a.getClient(options, loginCallbackURL.String())
+	if err != nil {
+		return nil, errors.WithStack(err)
+	}
+
+	postLoginRedirectURL, err := a.mergeURL(originalURL, originalURL.Path, options.OIDC.PublicBaseURL, true)
+	if err != nil {
+		return nil, errors.WithStack(err)
+	}
+
+	idToken, err := client.Authenticate(w, r, sess, postLoginRedirectURL.String())
 	if err != nil {
 		if errors.Is(err, ErrLoginRequired) {
 			metricLoginRequestsTotal.With(prometheus.Labels{
@@ -138,7 +182,7 @@ func (a *Authenticator) Authenticate(w http.ResponseWriter, r *http.Request, lay
 		return nil, errors.WithStack(err)
 	}
 
-	user, err := a.toUser(idToken, layer.Proxy, layer.Name, originalURL, options, sess)
+	user, err := a.toUser(originalURL, idToken, layer.Proxy, layer.Name, options, sess)
 	if err != nil {
 		return nil, errors.WithStack(err)
 	}
@@ -196,7 +240,7 @@ func (c claims) AsAttrs() map[string]any {
 	return attrs
 }
 
-func (a *Authenticator) toUser(idToken *oidc.IDToken, proxyName store.ProxyName, layerName store.LayerName, originalURL *url.URL, options *LayerOptions, sess *sessions.Session) (*authn.User, error) {
+func (a *Authenticator) toUser(originalURL *url.URL, idToken *oidc.IDToken, proxyName store.ProxyName, layerName store.LayerName, options *LayerOptions, sess *sessions.Session) (*authn.User, error) {
 	var claims claims
 
 	if err := idToken.Claims(&claims); err != nil {
@@ -209,7 +253,11 @@ func (a *Authenticator) toUser(idToken *oidc.IDToken, proxyName store.ProxyName,
 
 	attrs := claims.AsAttrs()
 
-	logoutURL := a.getLogoutURL(proxyName, layerName, originalURL, options)
+	logoutURL, err := a.getLogoutURL(originalURL, proxyName, layerName, options)
+	if err != nil {
+		return nil, errors.WithStack(err)
+	}
+
 	attrs["logout_url"] = logoutURL.String()
 
 	if accessToken, exists := sess.Values[sessionKeyAccessToken]; exists && accessToken != nil {
@@ -229,25 +277,109 @@ func (a *Authenticator) toUser(idToken *oidc.IDToken, proxyName store.ProxyName,
 	return user, nil
 }
 
-func (a *Authenticator) getRedirectURL(proxyName store.ProxyName, layerName store.LayerName, u *url.URL, options *LayerOptions) *url.URL {
-	return &url.URL{
-		Scheme: u.Scheme,
-		Host:   u.Host,
-		Path:   fmt.Sprintf(options.OIDC.LoginCallbackPath, fmt.Sprintf("%s/%s", proxyName, layerName)),
+func (a *Authenticator) getLoginCallbackURL(originalURL *url.URL, proxyName store.ProxyName, layerName store.LayerName, options *LayerOptions) (*url.URL, error) {
+	path, err := a.templatize(options.OIDC.LoginCallbackPath, proxyName, layerName)
+	if err != nil {
+		return nil, errors.WithStack(err)
+	}
+
+	merged, err := a.mergeURL(originalURL, path, options.OIDC.PublicBaseURL, false)
+	if err != nil {
+		return nil, errors.WithStack(err)
+	}
+
+	return merged, nil
+}
+
+func (a *Authenticator) getLogoutURL(originalURL *url.URL, proxyName store.ProxyName, layerName store.LayerName, options *LayerOptions) (*url.URL, error) {
+	path, err := a.templatize(options.OIDC.LogoutPath, proxyName, layerName)
+	if err != nil {
+		return nil, errors.WithStack(err)
+	}
+
+	merged, err := a.mergeURL(originalURL, path, options.OIDC.PublicBaseURL, true)
+	if err != nil {
+		return nil, errors.WithStack(err)
+	}
+
+	return merged, nil
+}
+
+func (a *Authenticator) mergeURL(base *url.URL, path string, overlay string, withQuery bool) (*url.URL, error) {
+	merged := &url.URL{
+		Scheme: base.Scheme,
+		Host:   base.Host,
+		Path:   path,
+	}
+
+	if withQuery {
+		merged.RawQuery = base.RawQuery
+	}
+
+	if overlay != "" {
+		overlayURL, err := url.Parse(overlay)
+		if err != nil {
+			return nil, errors.WithStack(err)
+		}
+
+		merged.Scheme = overlayURL.Scheme
+		merged.Host = overlayURL.Host
+		merged.Path = overlayURL.Path + strings.TrimPrefix(path, "/")
+
+		for key, values := range overlayURL.Query() {
+			query := merged.Query()
+			for _, v := range values {
+				query.Add(key, v)
+			}
+			merged.RawQuery = query.Encode()
 		}
 	}
 
-func (a *Authenticator) getLogoutURL(proxyName store.ProxyName, layerName store.LayerName, u *url.URL, options *LayerOptions) *url.URL {
-	return &url.URL{
-		Scheme: u.Scheme,
-		Host:   u.Host,
-		Path:   fmt.Sprintf(options.OIDC.LogoutPath, fmt.Sprintf("%s/%s", proxyName, layerName)),
+	return merged, nil
 }
+
+func (a *Authenticator) templatize(rawTemplate string, proxyName store.ProxyName, layerName store.LayerName) (string, error) {
+	tmpl, err := template.New("").Parse(rawTemplate)
+	if err != nil {
+		return "", errors.WithStack(err)
+	}
+
+	var raw bytes.Buffer
+
+	err = tmpl.Execute(&raw, struct {
+		ProxyName store.ProxyName
+		LayerName store.LayerName
+	}{
+		ProxyName: proxyName,
+		LayerName: layerName,
+	})
+	if err != nil {
+		return "", errors.WithStack(err)
+	}
+
+	return raw.String(), nil
 }
 
 func (a *Authenticator) getClient(options *LayerOptions, redirectURL string) (*Client, error) {
 	ctx := context.Background()
 
+	transport := a.httpTransport.Clone()
+
+	if options.OIDC.TLSInsecureSkipVerify {
+		if transport.TLSClientConfig == nil {
+			transport.TLSClientConfig = &tls.Config{}
+		}
+
+		transport.TLSClientConfig.InsecureSkipVerify = true
+	}
+
+	httpClient := &http.Client{
+		Timeout:   a.httpClientTimeout,
+		Transport: transport,
+	}
+
+	ctx = oidc.ClientContext(ctx, httpClient)
+
 	if options.OIDC.SkipIssuerVerification {
 		ctx = oidc.InsecureIssuerURLContext(ctx, options.OIDC.IssuerURL)
 	}
@@ -263,6 +395,7 @@ func (a *Authenticator) getClient(options *LayerOptions, redirectURL string) (*C
 		WithRedirectURL(redirectURL),
 		WithScopes(options.OIDC.Scopes...),
 		WithAuthParams(options.OIDC.AuthParams),
+		WithHTTPClient(httpClient),
 	)
 
 	return client, nil

internal/proxy/director/layer/authn/oidc/client.go

@@ -6,7 +6,6 @@ import (
 	"net/url"
 	"strings"
 
-	"forge.cadoles.com/cadoles/bouncer/internal/proxy/director"
 	"github.com/coreos/go-oidc/v3/oidc"
 	"github.com/dchest/uniuri"
 	"github.com/gorilla/sessions"
@@ -30,6 +29,7 @@ var (
 )
 
 type Client struct {
+	httpClient *http.Client
 	oauth2     *oauth2.Config
 	provider   *oidc.Provider
 	verifier   *oidc.IDTokenVerifier
@@ -44,12 +44,12 @@ func (c *Client) Provider() *oidc.Provider {
 	return c.provider
 }
 
-func (c *Client) Authenticate(w http.ResponseWriter, r *http.Request, sess *sessions.Session) (*oidc.IDToken, error) {
+func (c *Client) Authenticate(w http.ResponseWriter, r *http.Request, sess *sessions.Session, postLoginRedirectURL string) (*oidc.IDToken, error) {
 	idToken, err := c.getIDToken(r, sess)
 	if err != nil {
-		logger.Error(r.Context(), "could not retrieve idtoken", logger.E(errors.WithStack(err)))
+		logger.Warn(r.Context(), "could not retrieve idtoken", logger.E(errors.WithStack(err)))
 
-		c.login(w, r, sess)
+		c.login(w, r, sess, postLoginRedirectURL)
 
 		return nil, errors.WithStack(ErrLoginRequired)
 	}
@@ -57,23 +57,15 @@ func (c *Client) Authenticate(w http.ResponseWriter, r *http.Request, sess *sess
 	return idToken, nil
 }
 
-func (c *Client) login(w http.ResponseWriter, r *http.Request, sess *sessions.Session) {
+func (c *Client) login(w http.ResponseWriter, r *http.Request, sess *sessions.Session, postLoginRedirectURL string) {
 	ctx := r.Context()
 
 	state := uniuri.New()
 	nonce := uniuri.New()
 
-	originalURL, err := director.OriginalURL(ctx)
-	if err != nil {
-		logger.Error(ctx, "could not retrieve original url", logger.E(errors.WithStack(err)))
-		http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
-
-		return
-	}
-
 	sess.Values[sessionKeyLoginState] = state
 	sess.Values[sessionKeyLoginNonce] = nonce
-	sess.Values[sessionKeyPostLoginRedirectURL] = originalURL.String()
+	sess.Values[sessionKeyPostLoginRedirectURL] = postLoginRedirectURL
 
 	if err := sess.Save(r, w); err != nil {
 		logger.Error(ctx, "could not save session", logger.E(errors.WithStack(err)))
@@ -210,6 +202,7 @@ func (c *Client) sessionEndURL(idTokenHint, state, postLogoutRedirectURL string)
 
 func (c *Client) validate(r *http.Request, sess *sessions.Session) (*oauth2.Token, *oidc.IDToken, string, error) {
 	ctx := r.Context()
+	ctx = oidc.ClientContext(ctx, c.httpClient)
 
 	rawStoredState := sess.Values[sessionKeyLoginState]
 	receivedState := r.URL.Query().Get("state")
@@ -246,7 +239,7 @@ func (c *Client) validate(r *http.Request, sess *sessions.Session) (*oauth2.Toke
 func (c *Client) getRawIDToken(sess *sessions.Session) (string, error) {
 	rawIDToken, ok := sess.Values[sessionKeyIDToken].(string)
 	if !ok || rawIDToken == "" {
-		return "", errors.New("invalid id token")
+		return "", errors.New("id token not found")
 	}
 
 	return rawIDToken, nil
@@ -287,5 +280,6 @@ func NewClient(funcs ...ClientOptionFunc) *Client {
 		provider:   opts.Provider,
 		verifier:   verifier,
 		authParams: opts.AuthParams,
+		httpClient: opts.HTTPClient,
 	}
 }

internal/proxy/director/layer/authn/oidc/client_options.go

@@ -2,6 +2,7 @@ package oidc
 
 import (
 	"context"
+	"net/http"
 
 	"github.com/coreos/go-oidc/v3/oidc"
 )
@@ -14,6 +15,7 @@ type ClientOptions struct {
 	Scopes          []string
 	AuthParams      map[string]string
 	SkipIssuerCheck bool
+	HTTPClient      *http.Client
 }
 
 type ClientOptionFunc func(*ClientOptions)
@@ -63,9 +65,16 @@ func WithProvider(provider *oidc.Provider) ClientOptionFunc {
 	}
 }
 
+func WithHTTPClient(client *http.Client) ClientOptionFunc {
+	return func(opt *ClientOptions) {
+		opt.HTTPClient = client
+	}
+}
+
 func NewClientOptions(funcs ...ClientOptionFunc) *ClientOptions {
 	opt := &ClientOptions{
 		Scopes:     []string{oidc.ScopeOpenID, "profile"},
+		HTTPClient: http.DefaultClient,
 	}
 
 	for _, f := range funcs {

internal/proxy/director/layer/authn/oidc/layer-options.json

@@ -17,9 +17,13 @@
                     "title": "URL de base du fournisseur OpenID Connect (racine du .well-known/openid-configuration)",
                     "type": "string"
                 },
-                "postLogoutRedirectURL": {
-                    "title": "URL de redirection après déconnexion",
+                "postLogoutRedirectURLs": {
+                    "title": "URLs de redirection après déconnexion autorisées",
+                    "description": "La variable d'URL 'redirect=<url>' peut être utilisée pour spécifier une redirection après déconnexion.",
+                    "type": "array",
+                    "item": {
                         "type": "string"
+                    }
                 },
                 "scopes": {
                     "title": "Scopes associés au client OpenID Connect",
@@ -44,20 +48,43 @@
                 },
                 "loginCallbackPath": {
                     "title": "Chemin associé à l'URL de callback OpenID Connect",
-                    "default": "/.bouncer/authn/oidc/%s/callback",
-                    "description": "Le marqueur '%s' peut être utilisé pour injecter l'espace de nom '<proxy>/<layer>'.",
+                    "default": "/.bouncer/authn/oidc/{{ .ProxyName }}/{{ .LayerName }}/callback",
+                    "description": "Les marqueurs '{{ .ProxyName }}' et '{{ .LayerName }}'  peuvent être utilisés pour injecter le nom du proxy ainsi que celui du layer.",
+                    "type": "string"
+                },
+                "matchLoginCallbackPath": {
+                    "title": "Patron de correspondance du chemin interne de callback OpenID Connect",
+                    "default": "*.bouncer/authn/oidc/{{ .ProxyName }}/{{ .LayerName }}/callback",
+                    "description": "Les marqueurs '{{ .ProxyName }}' et '{{ .LayerName }}'  peuvent être utilisés pour injecter le nom du proxy ainsi que celui du layer.",
                     "type": "string"
                 },
                 "logoutPath": {
                     "title": "Chemin associé à l'URL de déconnexion",
-                    "default": "/.bouncer/authn/oidc/%s/logout",
-                    "description": "Le marqueur '%s' peut être utilisé pour injecter l'espace de nom '<proxy>/<layer>'.",
+                    "default": "/.bouncer/authn/oidc/{{ .ProxyName }}/{{ .LayerName }}/logout",
+                    "description": "Les marqueurs '{{ .ProxyName }}' et '{{ .LayerName }}'  peuvent être utilisés pour injecter le nom du proxy ainsi que celui du layer.",
+                    "type": "string"
+                },
+                "publicBaseURL": {
+                    "title": "URL publique de base associée au service distant",
+                    "default": "",
+                    "description": "Peut être utilisé par exemple si il y a discordance de nom d'hôte ou de chemin sur les URLs publiques/internes.",
+                    "type": "string"
+                },
+                "matchLogoutPath": {
+                    "title": "Patron de correspondance du chemin interne de déconnexion",
+                    "default": "*.bouncer/authn/oidc/{{ .ProxyName }}/{{ .LayerName }}/logout",
+                    "description": "Les marqueurs '{{ .ProxyName }}' et '{{ .LayerName }}'  peuvent être utilisés pour injecter le nom du proxy ainsi que celui du layer.",
                     "type": "string"
                 },
                 "skipIssuerVerification": {
                     "title": "Activer/désactiver la vérification de concordance de l'identifiant du fournisseur d'identité",
                     "default": false,
                     "type": "boolean"
+                },
+                "tlsInsecureSkipVerify": {
+                    "title": "Activer/désactiver la vérification du certificat TLS distant",
+                    "default": false,
+                    "type": "boolean"
                 }
             },
             "additionalProperties": false,

internal/proxy/director/layer/authn/oidc/layer.go

@@ -8,6 +8,11 @@ import (
 
 const LayerType store.LayerType = "authn-oidc"
 
-func NewLayer(store sessions.Store) *authn.Layer {
-	return authn.NewLayer(LayerType, &Authenticator{store: store})
+func NewLayer(store sessions.Store, funcs ...OptionFunc) *authn.Layer {
+	opts := NewOptions(funcs...)
+	return authn.NewLayer(LayerType, &Authenticator{
+		httpTransport:     opts.HTTPTransport,
+		httpClientTimeout: opts.HTTPClientTimeout,
+		store:             store,
+	})
 }

internal/proxy/director/layer/authn/oidc/layer_options.go

@@ -19,11 +19,15 @@ type LayerOptions struct {
 type OIDCOptions struct {
 	ClientID               string            `mapstructure:"clientId"`
 	ClientSecret           string            `mapstructure:"clientSecret"`
+	PublicBaseURL          string            `mapstructure:"publicBaseURL"`
 	LoginCallbackPath      string            `mapstructure:"loginCallbackPath"`
+	MatchLoginCallbackPath string            `mapstructure:"matchLoginCallbackPath"`
 	LogoutPath             string            `mapstructure:"logoutPath"`
+	MatchLogoutPath        string            `mapstructure:"matchLogoutPath"`
 	IssuerURL              string            `mapstructure:"issuerURL"`
 	SkipIssuerVerification bool              `mapstructure:"skipIssuerVerification"`
-	PostLogoutRedirectURL  string            `mapstructure:"postLogoutRedirectURL"`
+	PostLogoutRedirectURLs []string          `mapstructure:"postLogoutRedirectURLs"`
+	TLSInsecureSkipVerify  bool              `mapstructure:"tlsInsecureSkipVerify"`
 	Scopes                 []string          `mapstructure:"scopes"`
 	AuthParams             map[string]string `mapstructure:"authParams"`
 }
@@ -39,11 +43,17 @@ type CookieOptions struct {
 }
 
 func fromStoreOptions(storeOptions store.LayerOptions) (*LayerOptions, error) {
+	loginCallbackPath := ".bouncer/authn/oidc/{{ .ProxyName }}/{{ .LayerName }}/callback"
+	logoutPath := ".bouncer/authn/oidc/{{ .ProxyName }}/{{ .LayerName }}/logout"
+
 	layerOptions := LayerOptions{
 		LayerOptions: authn.DefaultLayerOptions(),
 		OIDC: OIDCOptions{
-			LoginCallbackPath: "/.bouncer/authn/oidc/%s/callback",
-			LogoutPath:        "/.bouncer/authn/oidc/%s/logout",
+			PublicBaseURL:          "",
+			LoginCallbackPath:      loginCallbackPath,
+			MatchLoginCallbackPath: "*" + loginCallbackPath,
+			LogoutPath:             logoutPath,
+			MatchLogoutPath:        "*" + logoutPath,
 			Scopes:                 []string{"openid"},
 		},
 		Cookie: CookieOptions{

internal/proxy/director/layer/authn/oidc/options.go

@@ -0,0 +1,38 @@
+package oidc
+
+import (
+	"net/http"
+	"time"
+)
+
+type Options struct {
+	HTTPTransport     *http.Transport
+	HTTPClientTimeout time.Duration
+}
+
+type OptionFunc func(opts *Options)
+
+func WithHTTPTransport(transport *http.Transport) OptionFunc {
+	return func(opts *Options) {
+		opts.HTTPTransport = transport
+	}
+}
+
+func WithHTTPClientTimeout(timeout time.Duration) OptionFunc {
+	return func(opts *Options) {
+		opts.HTTPClientTimeout = timeout
+	}
+}
+
+func NewOptions(funcs ...OptionFunc) *Options {
+	opts := &Options{
+		HTTPTransport:     http.DefaultTransport.(*http.Transport),
+		HTTPClientTimeout: 30 * time.Second,
+	}
+
+	for _, fn := range funcs {
+		fn(opts)
+	}
+
+	return opts
+}

internal/proxy/server.go

@@ -159,26 +159,10 @@ func (s *Server) createReverseProxy(ctx context.Context, target *url.URL) *httpu
 		DualStack:     bool(dialConfig.DualStack),
 	}
 
-	transportConfig := s.serverConfig.Transport
-
-	reverseProxy.Transport = &http.Transport{
-		Proxy:                  http.ProxyFromEnvironment,
-		DialContext:            dialer.DialContext,
-		ForceAttemptHTTP2:      bool(transportConfig.ForceAttemptHTTP2),
-		MaxIdleConns:           int(transportConfig.MaxIdleConns),
-		MaxIdleConnsPerHost:    int(transportConfig.MaxIdleConnsPerHost),
-		MaxConnsPerHost:        int(transportConfig.MaxConnsPerHost),
-		IdleConnTimeout:        time.Duration(*transportConfig.IdleConnTimeout),
-		TLSHandshakeTimeout:    time.Duration(*transportConfig.TLSHandshakeTimeout),
-		ExpectContinueTimeout:  time.Duration(*transportConfig.ExpectContinueTimeout),
-		DisableKeepAlives:      bool(transportConfig.DisableKeepAlives),
-		DisableCompression:     bool(transportConfig.DisableCompression),
-		ResponseHeaderTimeout:  time.Duration(*transportConfig.ResponseHeaderTimeout),
-		WriteBufferSize:        int(transportConfig.WriteBufferSize),
-		ReadBufferSize:         int(transportConfig.ReadBufferSize),
-		MaxResponseHeaderBytes: int64(transportConfig.MaxResponseHeaderBytes),
-	}
+	httpTransport := s.serverConfig.Transport.AsTransport()
+	httpTransport.DialContext = dialer.DialContext
 
+	reverseProxy.Transport = httpTransport
 	reverseProxy.ErrorHandler = s.errorHandler
 
 	return reverseProxy

internal/setup/authn_oidc_layer.go

@@ -1,6 +1,8 @@
 package setup
 
 import (
+	"time"
+
 	"forge.cadoles.com/cadoles/bouncer/internal/config"
 	"forge.cadoles.com/cadoles/bouncer/internal/proxy/director"
 	"forge.cadoles.com/cadoles/bouncer/internal/proxy/director/layer/authn"
@@ -25,5 +27,11 @@ func setupAuthnOIDCLayer(conf *config.Config) (director.Layer, error) {
 	adapter := redis.NewStoreAdapter(rdb)
 	store := session.NewStore(adapter)
 
-	return oidc.NewLayer(store), nil
+	transport := conf.Layers.Authn.OIDC.HTTPClient.AsTransport()
+
+	return oidc.NewLayer(
+		store,
+		oidc.WithHTTPTransport(transport),
+		oidc.WithHTTPClientTimeout(time.Duration(*conf.Layers.Authn.OIDC.HTTPClient.Timeout)),
+	), nil
 }