feat(oidc): hashed client secrets (#4026)

Allow use of hashed OpenID Connect client secrets.

cmd/authelia-gen/templates/docs-contributing-development-commitmsg.md.tmpl

@@ -12,6 +12,7 @@ weight: 320
 toc: true
 aliases:
   - /docs/contributing/commitmsg-guidelines.html
+  - /contributing/development/guidelines-commit-message/
 ---
 
 The reasons for these conventions are as follows:

docs/content/en/configuration/identity-providers/open-id-connect.md

@@ -118,7 +118,7 @@ identity_providers:
     clients:
       - id: myapp
         description: My Application
-        secret: this_is_a_secret
+        secret: '$plaintext$this_is_a_secret'
         sector_identifier: ''
         public: false
         authorization_policy: two_factor
@@ -352,7 +352,9 @@ A friendly description for this client shown in the UI. This defaults to the sam
 {{< confkey type="string" required="situational" >}}
 
 The shared secret between Authelia and the application consuming this client. This secret must match the secret
-configured in the application. Currently this is stored in plain text.
+configured in the application. This can either be stored in plain text (by prefixing the plain text secret with
+`$plaintext$` or can be a hashed password generated with
+[authelia crypto hash](../../reference/cli/authelia/authelia_hash-password.md).
 
 This secret must be generated by the administrator and can be done by following the
 [Generating a Random Alphanumeric String](../miscellaneous/guides.md#generating-a-random-alphanumeric-string) guide.

docs/content/en/contributing/guidelines/commit-message.md

@@ -12,6 +12,7 @@ weight: 320
 toc: true
 aliases:
   - /docs/contributing/commitmsg-guidelines.html
+  - /contributing/development/guidelines-commit-message/
 ---
 
 The reasons for these conventions are as follows:

docs/content/en/contributing/guidelines/pull-request.md

@@ -11,7 +11,7 @@ menu:
 weight: 320
 toc: true
 aliases:
-  - /contributing/development/pull-request/
+  - /contributing/development/guidelines-pull-request/
 ---
 
 [Pull Request] guidelines are in place in order to maintain consistency and clearly communicate our process for

docs/content/en/integration/openid-connect/apache-guacamole/index.md

@@ -59,7 +59,7 @@ The following YAML configuration is an example __Authelia__
 ```yaml
 - id: guacamole
   description: Apache Guacamole
-  secret: guacamole_client_secret
+  secret: '$plaintext$guacamole_client_secret'
   public: false
   authorization_policy: two_factor
   redirect_uris:

docs/content/en/integration/openid-connect/argocd/index.md

@@ -62,7 +62,7 @@ which will operate with the above example:
 ```yaml
 - id: argocd
   description: Argo CD
-  secret: argocd_client_secret
+  secret: '$plaintext$argocd_client_secret'
   public: false
   authorization_policy: two_factor
   redirect_uris:

docs/content/en/integration/openid-connect/bookstack/index.md

@@ -64,7 +64,7 @@ which will operate with the above example:
 ```yaml
 - id: bookstack
   description: BookStack
-  secret: bookstack_client_secret
+  secret: '$plaintext$bookstack_client_secret'
   public: false
   authorization_policy: two_factor
   redirect_uris:

docs/content/en/integration/openid-connect/cloudflare-zerotrust/index.md

@@ -72,7 +72,7 @@ which will operate with the above example:
 ```yaml
 - id: cloudflare
   description: Cloudflare ZeroTrust
-  secret: cloudflare_client_secret
+  secret: '$plaintext$cloudflare_client_secret'
   public: false
   authorization_policy: two_factor
   redirect_uris:

docs/content/en/integration/openid-connect/gitea/index.md

@@ -79,7 +79,7 @@ will operate with the above example:
 ```yaml
 - id: gitea
   description: Gitea
-  secret: gitea_client_secret
+  secret: '$plaintext$gitea_client_secret'
   public: false
   authorization_policy: two_factor
   redirect_uris:

docs/content/en/integration/openid-connect/gitlab/index.md

@@ -75,7 +75,7 @@ which will operate with the above example:
 ```yaml
 - id: gitlab
   description: GitLab
-  secret: gitlab_client_secret
+  secret: '$plaintext$gitlab_client_secret'
   public: false
   authorization_policy: two_factor
   redirect_uris:

docs/content/en/integration/openid-connect/grafana/index.md

@@ -93,7 +93,7 @@ which will operate with the above example:
 ```yaml
 - id: grafana
   description: Grafana
-  secret: grafana_client_secret
+  secret: '$plaintext$grafana_client_secret'
   public: false
   authorization_policy: two_factor
   redirect_uris:

docs/content/en/integration/openid-connect/harbor/index.md

@@ -66,7 +66,7 @@ which will operate with the above example:
 ```yaml
 - id: harbor
   description: Harbor
-  secret: harbor_client_secret
+  secret: '$plaintext$harbor_client_secret'
   public: false
   authorization_policy: two_factor
   redirect_uris:

docs/content/en/integration/openid-connect/hashicorp-vault/index.md

@@ -49,7 +49,7 @@ which will operate with the above example:
 ```yaml
 - id: vault
   description: HashiCorp Vault
-  secret: vault_client_secret
+  secret: '$plaintext$vault_client_secret'
   public: false
   authorization_policy: two_factor
   redirect_uris:

docs/content/en/integration/openid-connect/komga/index.md

@@ -71,7 +71,7 @@ which will operate with the above example:
 ```yaml
 - id: komga
   description: Komga
-  secret: komga_client_secret
+  secret: '$plaintext$komga_client_secret'
   public: false
   authorization_policy: two_factor
   redirect_uris:

docs/content/en/integration/openid-connect/nextcloud/index.md

@@ -87,7 +87,7 @@ which will operate with the above example:
 ```yaml
 - id: nextcloud
   description: NextCloud
-  secret: nextcloud_client_secret
+  secret: '$plaintext$nextcloud_client_secret'
   public: false
   authorization_policy: two_factor
   redirect_uris:

docs/content/en/integration/openid-connect/outline/index.md

@@ -66,7 +66,7 @@ which will operate with the above example:
 ```yaml
 - id: outline
   description: Outline
-  secret: outline_client_secret
+  secret: '$plaintext$outline_client_secret'
   public: false
   authorization_policy: two_factor
   redirect_uris:

docs/content/en/integration/openid-connect/portainer/index.md

@@ -67,7 +67,7 @@ which will operate with the above example:
 ```yaml
 - id: portainer
   description: Portainer
-  secret: portainer_client_secret
+  secret: '$plaintext$portainer_client_secret'
   public: false
   authorization_policy: two_factor
   redirect_uris:

docs/content/en/integration/openid-connect/proxmox/index.md

@@ -69,7 +69,7 @@ which will operate with the above example:
 ```yaml
 - id: proxmox
   description: Proxmox
-  secret: proxmox_client_secret
+  secret: '$plaintext$proxmox_client_secret'
   public: false
   authorization_policy: two_factor
   redirect_uris:

docs/content/en/integration/openid-connect/seafile/index.md

@@ -75,7 +75,7 @@ which will operate with the above example:
 ```yaml
 - id: seafile
   description: Seafile
-  secret: seafile_client_secret
+  secret: '$plaintext$seafile_client_secret'
   public: false
   authorization_policy: two_factor
   redirect_uris:

docs/content/en/integration/openid-connect/synapse/index.md

@@ -69,7 +69,7 @@ which will operate with the above example:
 ```yaml
 - id: synapse
   description: Synapse
-  secret: synapse_client_secret
+  secret: '$plaintext$synapse_client_secret'
   public: false
   authorization_policy: two_factor
   redirect_uris:

docs/content/en/reference/guides/rule-operators.md

@@ -2,7 +2,7 @@
 title: "Access Control Rule Guide"
 description: "A reference guide on access control rule operators"
 lead: "This section contains a reference guide on access control rule operators."
-date: 2022-09-09T15:44:23+10:00
+date: 2022-10-19T14:09:22+11:00
 draft: false
 images: []
 menu:

internal/configuration/decode_hooks.go

@@ -9,8 +9,10 @@ import (
 	"net/url"
 	"reflect"
 	"regexp"
+	"strings"
 	"time"
 
+	"github.com/go-crypt/crypt"
 	"github.com/mitchellh/mapstructure"
 
 	"github.com/authelia/authelia/v4/internal/configuration/schema"
@@ -412,3 +414,53 @@ func StringToPrivateKeyHookFunc() mapstructure.DecodeHookFuncType {
 		}
 	}
 }
+
+// StringToPasswordDigestHookFunc decodes a string into a crypt.Digest.
+func StringToPasswordDigestHookFunc(plaintext bool) mapstructure.DecodeHookFuncType {
+	return func(f reflect.Type, t reflect.Type, data interface{}) (value interface{}, err error) {
+		var ptr bool
+
+		if f.Kind() != reflect.String {
+			return data, nil
+		}
+
+		prefixType := ""
+
+		if t.Kind() == reflect.Ptr {
+			ptr = true
+			prefixType = "*"
+		}
+
+		expectedType := reflect.TypeOf(schema.PasswordDigest{})
+
+		if ptr && t.Elem() != expectedType {
+			return data, nil
+		} else if !ptr && t != expectedType {
+			return data, nil
+		}
+
+		dataStr := data.(string)
+
+		var result *schema.PasswordDigest
+
+		if !strings.HasPrefix(dataStr, "$") {
+			dataStr = fmt.Sprintf(crypt.StorageFormatSimple, crypt.AlgorithmPrefixPlainText, dataStr)
+		}
+
+		if dataStr != "" {
+			if result, err = schema.NewPasswordDigest(dataStr, plaintext); err != nil {
+				return nil, fmt.Errorf(errFmtDecodeHookCouldNotParse, dataStr, prefixType, expectedType.String(), err)
+			}
+		}
+
+		if ptr {
+			return result, nil
+		}
+
+		if result == nil {
+			return nil, fmt.Errorf(errFmtDecodeHookCouldNotParseEmptyValue, prefixType, expectedType.String(), errDecodeNonPtrMustHaveValue)
+		}
+
+		return *result, nil
+	}
+}

internal/configuration/provider.go

@@ -64,6 +64,7 @@ func unmarshal(ko *koanf.Koanf, val *schema.StructValidator, path string, o any)
 				StringToX509CertificateHookFunc(),
 				StringToX509CertificateChainHookFunc(),
 				StringToPrivateKeyHookFunc(),
+				StringToPasswordDigestHookFunc(true),
 				ToTimeDurationHookFunc(),
 			),
 			Metadata:         nil,

internal/configuration/schema/identity_providers.go

@@ -45,7 +45,7 @@ type OpenIDConnectCORSConfiguration struct {
 type OpenIDConnectClientConfiguration struct {
 	ID               string          `koanf:"id"`
 	Description      string          `koanf:"description"`
-	Secret           string  `koanf:"secret"`
+	Secret           *PasswordDigest `koanf:"secret"`
 	SectorIdentifier url.URL         `koanf:"sector_identifier"`
 	Public           bool            `koanf:"public"`
 

internal/configuration/schema/types.go

@@ -13,6 +13,8 @@ import (
 	"strconv"
 	"strings"
 	"time"
+
+	"github.com/go-crypt/crypt"
 )
 
 // NewAddressFromString returns an *Address and error depending on the ability to parse the string as an Address.
@@ -107,6 +109,29 @@ func (a Address) Listener() (net.Listener, error) {
 	return net.Listen(a.Scheme, a.HostPort())
 }
 
+// NewPasswordDigest returns a new PasswordDigest.
+func NewPasswordDigest(value string, plaintext bool) (digest *PasswordDigest, err error) {
+	var d crypt.Digest
+
+	switch {
+	case plaintext:
+		d, err = crypt.DecodeWithPlainText(value)
+	default:
+		d, err = crypt.Decode(value)
+	}
+
+	if err != nil {
+		return nil, err
+	}
+
+	return &PasswordDigest{d}, err
+}
+
+// PasswordDigest is a configuration type for the crypt.Digest.
+type PasswordDigest struct {
+	crypt.Digest
+}
+
 // NewX509CertificateChain creates a new *X509CertificateChain from a given string, parsing each PEM block one by one.
 func NewX509CertificateChain(in string) (chain *X509CertificateChain, err error) {
 	if in == "" {

internal/configuration/test_resources/config_oidc.yml

@@ -132,6 +132,6 @@ identity_providers:
         - https://example.com
     clients:
       - id: abc
-        secret: 123
+        secret: '123'
         consent_mode: explicit
 ...

internal/configuration/validator/identity_providers.go

@@ -161,11 +161,11 @@ func validateOIDCClients(config *schema.OpenIDConnectConfiguration, validator *s
 		}
 
 		if client.Public {
-			if client.Secret != "" {
+			if client.Secret != nil {
 				validator.Push(fmt.Errorf(errFmtOIDCClientPublicInvalidSecret, client.ID))
 			}
 		} else {
-			if client.Secret == "" {
+			if client.Secret == nil {
 				validator.Push(fmt.Errorf(errFmtOIDCClientInvalidSecret, client.ID))
 			}
 		}

internal/configuration/validator/identity_providers_test.go

@@ -46,7 +46,7 @@ func TestShouldNotRaiseErrorWhenCORSEndpointsValid(t *testing.T) {
 			Clients: []schema.OpenIDConnectClientConfiguration{
 				{
 					ID:     "example",
-					Secret: "example",
+					Secret: MustDecodeSecret("$plaintext$example"),
 				},
 			},
 		},
@@ -69,7 +69,7 @@ func TestShouldRaiseErrorWhenCORSEndpointsNotValid(t *testing.T) {
 			Clients: []schema.OpenIDConnectClientConfiguration{
 				{
 					ID:     "example",
-					Secret: "example",
+					Secret: MustDecodeSecret("$plaintext$example"),
 				},
 			},
 		},
@@ -114,7 +114,7 @@ func TestShouldRaiseErrorWhenOIDCCORSOriginsHasInvalidValues(t *testing.T) {
 			Clients: []schema.OpenIDConnectClientConfiguration{
 				{
 					ID:           "myclient",
-					Secret:       "jk12nb3klqwmnelqkwenm",
+					Secret:       MustDecodeSecret("$plaintext$jk12nb3klqwmnelqkwenm"),
 					Policy:       "two_factor",
 					RedirectURIs: []string{"https://example.com/oauth2_callback", "https://localhost:566/callback", "http://an.example.com/callback", "file://a/file"},
 				},
@@ -173,7 +173,7 @@ func TestShouldRaiseErrorWhenOIDCServerClientBadValues(t *testing.T) {
 			Clients: []schema.OpenIDConnectClientConfiguration{
 				{
 					ID:           "",
-					Secret:       "",
+					Secret:       nil,
 					Policy:       "",
 					RedirectURIs: []string{},
 				},
@@ -188,7 +188,7 @@ func TestShouldRaiseErrorWhenOIDCServerClientBadValues(t *testing.T) {
 			Clients: []schema.OpenIDConnectClientConfiguration{
 				{
 					ID:     "client-1",
-					Secret: "a-secret",
+					Secret: MustDecodeSecret("$plaintext$a-secret"),
 					Policy: "a-policy",
 					RedirectURIs: []string{
 						"https://google.com",
@@ -202,13 +202,13 @@ func TestShouldRaiseErrorWhenOIDCServerClientBadValues(t *testing.T) {
 			Clients: []schema.OpenIDConnectClientConfiguration{
 				{
 					ID:           "client-x",
-					Secret:       "a-secret",
+					Secret:       MustDecodeSecret("$plaintext$a-secret"),
 					Policy:       policyTwoFactor,
 					RedirectURIs: []string{},
 				},
 				{
 					ID:           "client-x",
-					Secret:       "a-secret",
+					Secret:       MustDecodeSecret("$plaintext$a-secret"),
 					Policy:       policyTwoFactor,
 					RedirectURIs: []string{},
 				},
@@ -220,7 +220,7 @@ func TestShouldRaiseErrorWhenOIDCServerClientBadValues(t *testing.T) {
 			Clients: []schema.OpenIDConnectClientConfiguration{
 				{
 					ID:     "client-check-uri-parse",
-					Secret: "a-secret",
+					Secret: MustDecodeSecret("$plaintext$a-secret"),
 					Policy: policyTwoFactor,
 					RedirectURIs: []string{
 						"http://abc@%two",
@@ -236,7 +236,7 @@ func TestShouldRaiseErrorWhenOIDCServerClientBadValues(t *testing.T) {
 			Clients: []schema.OpenIDConnectClientConfiguration{
 				{
 					ID:     "client-check-uri-abs",
-					Secret: "a-secret",
+					Secret: MustDecodeSecret("$plaintext$a-secret"),
 					Policy: policyTwoFactor,
 					RedirectURIs: []string{
 						"google.com",
@@ -252,7 +252,7 @@ func TestShouldRaiseErrorWhenOIDCServerClientBadValues(t *testing.T) {
 			Clients: []schema.OpenIDConnectClientConfiguration{
 				{
 					ID:     "client-valid-sector",
-					Secret: "a-secret",
+					Secret: MustDecodeSecret("$plaintext$a-secret"),
 					Policy: policyTwoFactor,
 					RedirectURIs: []string{
 						"https://google.com",
@@ -266,7 +266,7 @@ func TestShouldRaiseErrorWhenOIDCServerClientBadValues(t *testing.T) {
 			Clients: []schema.OpenIDConnectClientConfiguration{
 				{
 					ID:     "client-valid-sector",
-					Secret: "a-secret",
+					Secret: MustDecodeSecret("$plaintext$a-secret"),
 					Policy: policyTwoFactor,
 					RedirectURIs: []string{
 						"https://google.com",
@@ -280,7 +280,7 @@ func TestShouldRaiseErrorWhenOIDCServerClientBadValues(t *testing.T) {
 			Clients: []schema.OpenIDConnectClientConfiguration{
 				{
 					ID:     "client-invalid-sector",
-					Secret: "a-secret",
+					Secret: MustDecodeSecret("$plaintext$a-secret"),
 					Policy: policyTwoFactor,
 					RedirectURIs: []string{
 						"https://google.com",
@@ -302,7 +302,7 @@ func TestShouldRaiseErrorWhenOIDCServerClientBadValues(t *testing.T) {
 			Clients: []schema.OpenIDConnectClientConfiguration{
 				{
 					ID:     "client-invalid-sector",
-					Secret: "a-secret",
+					Secret: MustDecodeSecret("$plaintext$a-secret"),
 					Policy: policyTwoFactor,
 					RedirectURIs: []string{
 						"https://google.com",
@@ -350,7 +350,7 @@ func TestShouldRaiseErrorWhenOIDCClientConfiguredWithBadScopes(t *testing.T) {
 			Clients: []schema.OpenIDConnectClientConfiguration{
 				{
 					ID:     "good_id",
-					Secret: "good_secret",
+					Secret: MustDecodeSecret("$plaintext$good_secret"),
 					Policy: "two_factor",
 					Scopes: []string{"openid", "bad_scope"},
 					RedirectURIs: []string{
@@ -376,7 +376,7 @@ func TestShouldRaiseErrorWhenOIDCClientConfiguredWithBadGrantTypes(t *testing.T)
 			Clients: []schema.OpenIDConnectClientConfiguration{
 				{
 					ID:         "good_id",
-					Secret:     "good_secret",
+					Secret:     MustDecodeSecret("$plaintext$good_secret"),
 					Policy:     "two_factor",
 					GrantTypes: []string{"bad_grant_type"},
 					RedirectURIs: []string{
@@ -403,7 +403,7 @@ func TestShouldNotErrorOnCertificateValid(t *testing.T) {
 			Clients: []schema.OpenIDConnectClientConfiguration{
 				{
 					ID:     "good_id",
-					Secret: "good_secret",
+					Secret: MustDecodeSecret("$plaintext$good_secret"),
 					Policy: "two_factor",
 					RedirectURIs: []string{
 						"https://google.com/callback",
@@ -429,7 +429,7 @@ func TestShouldRaiseErrorOnCertificateNotValid(t *testing.T) {
 			Clients: []schema.OpenIDConnectClientConfiguration{
 				{
 					ID:     "good_id",
-					Secret: "good_secret",
+					Secret: MustDecodeSecret("$plaintext$good_secret"),
 					Policy: "two_factor",
 					RedirectURIs: []string{
 						"https://google.com/callback",
@@ -456,7 +456,7 @@ func TestShouldRaiseErrorOnKeySizeTooSmall(t *testing.T) {
 			Clients: []schema.OpenIDConnectClientConfiguration{
 				{
 					ID:     "good_id",
-					Secret: "good_secret",
+					Secret: MustDecodeSecret("$plaintext$good_secret"),
 					Policy: "two_factor",
 					RedirectURIs: []string{
 						"https://google.com/callback",
@@ -483,7 +483,7 @@ func TestShouldRaiseErrorWhenOIDCClientConfiguredWithBadResponseModes(t *testing
 			Clients: []schema.OpenIDConnectClientConfiguration{
 				{
 					ID:            "good_id",
-					Secret:        "good_secret",
+					Secret:        MustDecodeSecret("$plaintext$good_secret"),
 					Policy:        "two_factor",
 					ResponseModes: []string{"bad_responsemode"},
 					RedirectURIs: []string{
@@ -509,7 +509,7 @@ func TestShouldRaiseErrorWhenOIDCClientConfiguredWithBadUserinfoAlg(t *testing.T
 			Clients: []schema.OpenIDConnectClientConfiguration{
 				{
 					ID:                       "good_id",
-					Secret:                   "good_secret",
+					Secret:                   MustDecodeSecret("$plaintext$good_secret"),
 					Policy:                   "two_factor",
 					UserinfoSigningAlgorithm: "rs256",
 					RedirectURIs: []string{
@@ -536,7 +536,7 @@ func TestValidateIdentityProvidersShouldRaiseWarningOnSecurityIssue(t *testing.T
 			Clients: []schema.OpenIDConnectClientConfiguration{
 				{
 					ID:     "good_id",
-					Secret: "good_secret",
+					Secret: MustDecodeSecret("$plaintext$good_secret"),
 					Policy: "two_factor",
 					RedirectURIs: []string{
 						"https://google.com/callback",
@@ -563,7 +563,7 @@ func TestValidateIdentityProvidersShouldRaiseErrorsOnInvalidClientTypes(t *testi
 			Clients: []schema.OpenIDConnectClientConfiguration{
 				{
 					ID:     "client-with-invalid-secret",
-					Secret: "a-secret",
+					Secret: MustDecodeSecret("$plaintext$a-secret"),
 					Public: true,
 					Policy: "two_factor",
 					RedirectURIs: []string{
@@ -572,7 +572,7 @@ func TestValidateIdentityProvidersShouldRaiseErrorsOnInvalidClientTypes(t *testi
 				},
 				{
 					ID:     "client-with-bad-redirect-uri",
-					Secret: "a-secret",
+					Secret: MustDecodeSecret("$plaintext$a-secret"),
 					Public: false,
 					Policy: "two_factor",
 					RedirectURIs: []string{
@@ -642,7 +642,7 @@ func TestValidateIdentityProvidersShouldSetDefaultValues(t *testing.T) {
 			Clients: []schema.OpenIDConnectClientConfiguration{
 				{
 					ID:     "a-client",
-					Secret: "a-client-secret",
+					Secret: MustDecodeSecret("$plaintext$a-client-secret"),
 					RedirectURIs: []string{
 						"https://google.com",
 					},
@@ -650,7 +650,7 @@ func TestValidateIdentityProvidersShouldSetDefaultValues(t *testing.T) {
 				{
 					ID:                       "b-client",
 					Description:              "Normal Description",
-					Secret:                   "b-client-secret",
+					Secret:                   MustDecodeSecret("$plaintext$b-client-secret"),
 					Policy:                   policyOneFactor,
 					UserinfoSigningAlgorithm: "RS256",
 					RedirectURIs: []string{
@@ -775,6 +775,14 @@ func TestValidateOIDCClientRedirectURIsSupportingPrivateUseURISchemes(t *testing
 	})
 }
 
+func MustDecodeSecret(value string) *schema.PasswordDigest {
+	if secret, err := schema.NewPasswordDigest(value, true); err != nil {
+		panic(err)
+	} else {
+		return secret
+	}
+}
+
 func MustParseRSAPrivateKey(data string) *rsa.PrivateKey {
 	block, _ := pem.Decode([]byte(data))
 	if block == nil || block.Bytes == nil || len(block.Bytes) == 0 {

internal/oidc/client.go

@@ -14,7 +14,7 @@ func NewClient(config schema.OpenIDConnectClientConfiguration) (client *Client)
 	client = &Client{
 		ID:               config.ID,
 		Description:      config.Description,
-		Secret:           []byte(config.Secret),
+		Secret:           config.Secret,
 		SectorIdentifier: config.SectorIdentifier.String(),
 		Public:           config.Public,
 
@@ -76,7 +76,11 @@ func (c *Client) GetConsentResponseBody(consent *model.OAuth2ConsentSession) Con
 
 // GetHashedSecret returns the Secret.
 func (c *Client) GetHashedSecret() []byte {
-	return c.Secret
+	if c.Secret == nil {
+		return []byte(nil)
+	}
+
+	return []byte(c.Secret.Encode())
 }
 
 // GetRedirectURIs returns the RedirectURIs.

internal/oidc/client_test.go

@@ -26,7 +26,7 @@ func TestNewClient(t *testing.T) {
 		ID:            "myapp",
 		Description:   "My App",
 		Policy:        "two_factor",
-		Secret:        "abcdef",
+		Secret:        MustDecodeSecret("$plaintext$abcdef"),
 		RedirectURIs:  []string{"https://google.com/callback"},
 		Scopes:        schema.DefaultOpenIDConnectClientConfiguration.Scopes,
 		ResponseTypes: schema.DefaultOpenIDConnectClientConfiguration.ResponseTypes,
@@ -68,7 +68,7 @@ func TestIsAuthenticationLevelSufficient(t *testing.T) {
 	assert.False(t, c.IsAuthenticationLevelSufficient(authentication.TwoFactor))
 }
 
-func TestInternalClient_GetConsentResponseBody(t *testing.T) {
+func TestClient_GetConsentResponseBody(t *testing.T) {
 	c := Client{}
 
 	consentRequestBody := c.GetConsentResponseBody(nil)
@@ -95,7 +95,7 @@ func TestInternalClient_GetConsentResponseBody(t *testing.T) {
 	assert.Equal(t, expectedAudiences, consentRequestBody.Audience)
 }
 
-func TestInternalClient_GetAudience(t *testing.T) {
+func TestClient_GetAudience(t *testing.T) {
 	c := Client{}
 
 	audience := c.GetAudience()
@@ -108,7 +108,7 @@ func TestInternalClient_GetAudience(t *testing.T) {
 	assert.Equal(t, "https://example.com", audience[0])
 }
 
-func TestInternalClient_GetScopes(t *testing.T) {
+func TestClient_GetScopes(t *testing.T) {
 	c := Client{}
 
 	scopes := c.GetScopes()
@@ -121,7 +121,7 @@ func TestInternalClient_GetScopes(t *testing.T) {
 	assert.Equal(t, "openid", scopes[0])
 }
 
-func TestInternalClient_GetGrantTypes(t *testing.T) {
+func TestClient_GetGrantTypes(t *testing.T) {
 	c := Client{}
 
 	grantTypes := c.GetGrantTypes()
@@ -135,19 +135,30 @@ func TestInternalClient_GetGrantTypes(t *testing.T) {
 	assert.Equal(t, "device_code", grantTypes[0])
 }
 
-func TestInternalClient_GetHashedSecret(t *testing.T) {
+func TestClient_Hashing(t *testing.T) {
 	c := Client{}
 
 	hashedSecret := c.GetHashedSecret()
 	assert.Equal(t, []byte(nil), hashedSecret)
 
-	c.Secret = []byte("a_bad_secret")
+	c.Secret = MustDecodeSecret("$plaintext$a_bad_secret")
 
-	hashedSecret = c.GetHashedSecret()
+	assert.True(t, c.Secret.MatchBytes([]byte("a_bad_secret")))
-	assert.Equal(t, []byte("a_bad_secret"), hashedSecret)
 }
 
-func TestInternalClient_GetID(t *testing.T) {
+func TestClient_GetHashedSecret(t *testing.T) {
+	c := Client{}
+
+	hashedSecret := c.GetHashedSecret()
+	assert.Equal(t, []byte(nil), hashedSecret)
+
+	c.Secret = MustDecodeSecret("$plaintext$a_bad_secret")
+
+	hashedSecret = c.GetHashedSecret()
+	assert.Equal(t, []byte("$plaintext$a_bad_secret"), hashedSecret)
+}
+
+func TestClient_GetID(t *testing.T) {
 	c := Client{}
 
 	id := c.GetID()
@@ -159,7 +170,7 @@ func TestInternalClient_GetID(t *testing.T) {
 	assert.Equal(t, "myid", id)
 }
 
-func TestInternalClient_GetRedirectURIs(t *testing.T) {
+func TestClient_GetRedirectURIs(t *testing.T) {
 	c := Client{}
 
 	redirectURIs := c.GetRedirectURIs()
@@ -172,7 +183,7 @@ func TestInternalClient_GetRedirectURIs(t *testing.T) {
 	assert.Equal(t, "https://example.com/oauth2/callback", redirectURIs[0])
 }
 
-func TestInternalClient_GetResponseModes(t *testing.T) {
+func TestClient_GetResponseModes(t *testing.T) {
 	c := Client{}
 
 	responseModes := c.GetResponseModes()
@@ -191,7 +202,7 @@ func TestInternalClient_GetResponseModes(t *testing.T) {
 	assert.Equal(t, fosite.ResponseModeFragment, responseModes[3])
 }
 
-func TestInternalClient_GetResponseTypes(t *testing.T) {
+func TestClient_GetResponseTypes(t *testing.T) {
 	c := Client{}
 
 	responseTypes := c.GetResponseTypes()
@@ -206,7 +217,7 @@ func TestInternalClient_GetResponseTypes(t *testing.T) {
 	assert.Equal(t, "id_token", responseTypes[1])
 }
 
-func TestInternalClient_IsPublic(t *testing.T) {
+func TestClient_IsPublic(t *testing.T) {
 	c := Client{}
 
 	assert.False(t, c.IsPublic())
@@ -214,3 +225,11 @@ func TestInternalClient_IsPublic(t *testing.T) {
 	c.Public = true
 	assert.True(t, c.IsPublic())
 }
+
+func MustDecodeSecret(value string) *schema.PasswordDigest {
+	if secret, err := schema.NewPasswordDigest(value, true); err != nil {
+		panic(err)
+	} else {
+		return secret
+	}
+}

internal/oidc/hasher.go

@@ -2,19 +2,26 @@ package oidc
 
 import (
 	"context"
-	"crypto/subtle"
+
+	"github.com/go-crypt/crypt"
 )
 
 // Compare compares the hash with the data and returns an error if they don't match.
-func (h PlainTextHasher) Compare(_ context.Context, hash, data []byte) (err error) {
+func (h AdaptiveHasher) Compare(_ context.Context, hash, data []byte) (err error) {
-	if subtle.ConstantTimeCompare(hash, data) == 0 {
+	var digest crypt.Digest
-		return errPasswordsDoNotMatch
+
+	if digest, err = crypt.DecodeWithPlainText(string(hash)); err != nil {
+		return err
 	}
 
+	if digest.MatchBytes(data) {
 		return nil
 	}
 
+	return errPasswordsDoNotMatch
+}
+
 // Hash creates a new hash from data.
-func (h PlainTextHasher) Hash(_ context.Context, data []byte) (hash []byte, err error) {
+func (h AdaptiveHasher) Hash(_ context.Context, data []byte) (hash []byte, err error) {
 	return data, nil
 }

internal/oidc/hasher_test.go

@@ -8,9 +8,9 @@ import (
 )
 
 func TestShouldNotRaiseErrorOnEqualPasswordsPlainText(t *testing.T) {
-	hasher := PlainTextHasher{}
+	hasher := AdaptiveHasher{}
 
-	a := []byte("abc")
+	a := []byte("$plaintext$abc")
 	b := []byte("abc")
 
 	ctx := context.Background()
@@ -21,9 +21,9 @@ func TestShouldNotRaiseErrorOnEqualPasswordsPlainText(t *testing.T) {
 }
 
 func TestShouldRaiseErrorOnNonEqualPasswordsPlainText(t *testing.T) {
-	hasher := PlainTextHasher{}
+	hasher := AdaptiveHasher{}
 
-	a := []byte("abc")
+	a := []byte("$plaintext$abc")
 	b := []byte("abcd")
 
 	ctx := context.Background()
@@ -34,7 +34,7 @@ func TestShouldRaiseErrorOnNonEqualPasswordsPlainText(t *testing.T) {
 }
 
 func TestShouldHashPassword(t *testing.T) {
-	hasher := PlainTextHasher{}
+	hasher := AdaptiveHasher{}
 
 	data := []byte("abc")
 

internal/oidc/provider.go

@@ -69,7 +69,7 @@ func NewOpenIDConnectProvider(config *schema.OpenIDConnectConfiguration, store s
 		cconfig,
 		provider.Store,
 		strategy,
-		PlainTextHasher{},
+		AdaptiveHasher{},
 
 		/*
 			These are the OAuth2 and OpenIDConnect factories. Order is important (the OAuth2 factories at the top must

internal/oidc/provider_test.go

@@ -31,7 +31,7 @@ func TestNewOpenIDConnectProvider_ShouldEnableOptionalDiscoveryValues(t *testing
 		Clients: []schema.OpenIDConnectClientConfiguration{
 			{
 				ID:               "a-client",
-				Secret:           "a-client-secret",
+				Secret:           MustDecodeSecret("$plaintext$a-client-secret"),
 				SectorIdentifier: url.URL{Host: "google.com"},
 				Policy:           "one_factor",
 				RedirectURIs: []string{
@@ -62,7 +62,7 @@ func TestOpenIDConnectProvider_NewOpenIDConnectProvider_GoodConfiguration(t *tes
 		Clients: []schema.OpenIDConnectClientConfiguration{
 			{
 				ID:     "a-client",
-				Secret: "a-client-secret",
+				Secret: MustDecodeSecret("$plaintext$a-client-secret"),
 				Policy: "one_factor",
 				RedirectURIs: []string{
 					"https://google.com",
@@ -71,7 +71,7 @@ func TestOpenIDConnectProvider_NewOpenIDConnectProvider_GoodConfiguration(t *tes
 			{
 				ID:          "b-client",
 				Description: "Normal Description",
-				Secret:      "b-client-secret",
+				Secret:      MustDecodeSecret("$plaintext$b-client-secret"),
 				Policy:      "two_factor",
 				RedirectURIs: []string{
 					"https://google.com",
@@ -102,7 +102,7 @@ func TestOpenIDConnectProvider_NewOpenIDConnectProvider_GetOpenIDConnectWellKnow
 		Clients: []schema.OpenIDConnectClientConfiguration{
 			{
 				ID:     "a-client",
-				Secret: "a-client-secret",
+				Secret: MustDecodeSecret("$plaintext$a-client-secret"),
 				Policy: "one_factor",
 				RedirectURIs: []string{
 					"https://google.com",
@@ -192,7 +192,7 @@ func TestOpenIDConnectProvider_NewOpenIDConnectProvider_GetOAuth2WellKnownConfig
 		Clients: []schema.OpenIDConnectClientConfiguration{
 			{
 				ID:     "a-client",
-				Secret: "a-client-secret",
+				Secret: MustDecodeSecret("$plaintext$a-client-secret"),
 				Policy: "one_factor",
 				RedirectURIs: []string{
 					"https://google.com",
@@ -271,7 +271,7 @@ func TestOpenIDConnectProvider_NewOpenIDConnectProvider_GetOpenIDConnectWellKnow
 		Clients: []schema.OpenIDConnectClientConfiguration{
 			{
 				ID:     "a-client",
-				Secret: "a-client-secret",
+				Secret: MustDecodeSecret("$plaintext$a-client-secret"),
 				Policy: "one_factor",
 				RedirectURIs: []string{
 					"https://google.com",

internal/oidc/store_test.go

@@ -21,14 +21,14 @@ func TestOpenIDConnectStore_GetClientPolicy(t *testing.T) {
 				Description: "myclient desc",
 				Policy:      "one_factor",
 				Scopes:      []string{ScopeOpenID, ScopeProfile},
-				Secret:      "mysecret",
+				Secret:      MustDecodeSecret("$plaintext$mysecret"),
 			},
 			{
 				ID:          "myotherclient",
 				Description: "myclient desc",
 				Policy:      "two_factor",
 				Scopes:      []string{ScopeOpenID, ScopeProfile},
-				Secret:      "mysecret",
+				Secret:      MustDecodeSecret("$plaintext$mysecret"),
 			},
 		},
 	}, nil)
@@ -53,7 +53,7 @@ func TestOpenIDConnectStore_GetInternalClient(t *testing.T) {
 				Description: "myclient desc",
 				Policy:      "one_factor",
 				Scopes:      []string{ScopeOpenID, ScopeProfile},
-				Secret:      "mysecret",
+				Secret:      MustDecodeSecret("$plaintext$mysecret"),
 			},
 		},
 	}, nil)
@@ -74,7 +74,7 @@ func TestOpenIDConnectStore_GetInternalClient_ValidClient(t *testing.T) {
 		Description: "myclient desc",
 		Policy:      "one_factor",
 		Scopes:      []string{ScopeOpenID, ScopeProfile},
-		Secret:      "mysecret",
+		Secret:      MustDecodeSecret("$plaintext$mysecret"),
 	}
 
 	s := NewOpenIDConnectStore(&schema.OpenIDConnectConfiguration{
@@ -93,7 +93,7 @@ func TestOpenIDConnectStore_GetInternalClient_ValidClient(t *testing.T) {
 	assert.Equal(t, client.ResponseTypes, c1.ResponseTypes)
 	assert.Equal(t, client.RedirectURIs, c1.RedirectURIs)
 	assert.Equal(t, client.Policy, authorization.OneFactor)
-	assert.Equal(t, client.Secret, []byte(c1.Secret))
+	assert.Equal(t, client.Secret.Encode(), "$plaintext$mysecret")
 }
 
 func TestOpenIDConnectStore_GetInternalClient_InvalidClient(t *testing.T) {
@@ -102,7 +102,7 @@ func TestOpenIDConnectStore_GetInternalClient_InvalidClient(t *testing.T) {
 		Description: "myclient desc",
 		Policy:      "one_factor",
 		Scopes:      []string{ScopeOpenID, ScopeProfile},
-		Secret:      "mysecret",
+		Secret:      MustDecodeSecret("$plaintext$mysecret"),
 	}
 
 	s := NewOpenIDConnectStore(&schema.OpenIDConnectConfiguration{
@@ -126,7 +126,7 @@ func TestOpenIDConnectStore_IsValidClientID(t *testing.T) {
 				Description: "myclient desc",
 				Policy:      "one_factor",
 				Scopes:      []string{ScopeOpenID, ScopeProfile},
-				Secret:      "mysecret",
+				Secret:      MustDecodeSecret("$plaintext$mysecret"),
 			},
 		},
 	}, nil)

internal/oidc/types.go

@@ -4,6 +4,7 @@ import (
 	"net/url"
 	"time"
 
+	"github.com/go-crypt/crypt"
 	"github.com/ory/fosite"
 	"github.com/ory/fosite/handler/openid"
 	"github.com/ory/fosite/token/jwt"
@@ -101,7 +102,7 @@ type Store struct {
 type Client struct {
 	ID               string
 	Description      string
-	Secret           []byte
+	Secret           crypt.Digest
 	SectorIdentifier string
 	Public           bool
 
@@ -182,8 +183,8 @@ type KeyManager struct {
 	jwks *jose.JSONWebKeySet
 }
 
-// PlainTextHasher implements the fosite.Hasher interface without an actual hashing algo.
+// AdaptiveHasher implements the fosite.Hasher interface without an actual hashing algo.
-type PlainTextHasher struct{}
+type AdaptiveHasher struct{}
 
 // ConsentGetResponseBody schema of the response body of the consent GET endpoint.
 type ConsentGetResponseBody struct {