diff --git a/README.md b/README.md
index 9581761829eccf5dae313d510cb720681e9d31a7..de3d417431f485b4a129c4bd9884a1936b1ffad5 100644
--- a/README.md
+++ b/README.md
@@ -152,7 +152,6 @@ Obviously you should setup a role user for running in prodution.
- `provider` : string. Name of the oauth provider. Valid providers are currently "google", "github" and "gitlab".
- `oauth_client_id` : string. Oauth Client ID. This can be a secret stored in a [vault](https://www.vaultproject.io/) using the form `/vault/path/key` e.g. `/vault/secret/cashier/oauth_client_id`.
- `oauth_client_secret` : string. Oauth secret. This can be a secret stored in a [vault](https://www.vaultproject.io/) using the form `/vault/path/key` e.g. `/vault/secret/cashier/oauth_client_secret`.
-- `oauth_callback_url` : string. URL that the Oauth provider will redirect to after user authorisation. The path is hardcoded to `"/auth/callback"` in the source.
- `provider_opts` : object. Additional options for the provider.
- `users_whitelist` : array of strings. Optional list of whitelisted usernames. If missing, all users of your current domain/organization are allowed to authenticate against cashierd. For Google auth a user is an email address. For GitHub auth a user is a GitHub username.
@@ -210,7 +209,7 @@ The server is configured using a HCL configuration file - [example](example-serv
For the server you need the following:
- A new ssh private key. Generate one in the usual way using `ssh-keygen -f ssh_ca` - this is your CA signing key. At this time Cashier supports RSA, ECDSA and Ed25519 keys. *Important* This key should be kept safe - *ANY* ssh key signed with this key will be able to access your machines.
-- OAuth (Google or GitHub) credentials. You may also need to set the callback URL when creating these.
+- OAuth (Google, GitHub or Gitlab) credentials. Cashier's callback handler is `/auth/callback` so set the callback URL appropriately when creating the credentials.
## Using cashier
Once the server is up and running you'll need to configure your client.
diff --git a/cmd/cashierd/main.go b/cmd/cashierd/main.go
index 727777399b96b3faca41854184156983ff420372..b054606853d6c4c59cd44bb3cffec416a47a2452 100644
--- a/cmd/cashierd/main.go
+++ b/cmd/cashierd/main.go
@@ -182,7 +182,7 @@ func signHandler(a *appContext, w http.ResponseWriter, r *http.Request) (int, er
func loginHandler(a *appContext, w http.ResponseWriter, r *http.Request) (int, error) {
state := newState()
a.setAuthStateCookie(w, r, state)
- a.authsession = a.authprovider.StartSession(state)
+ a.authsession = a.authprovider.StartSession(state, r)
http.Redirect(w, r, a.authsession.AuthURL, http.StatusFound)
return http.StatusFound, nil
}
diff --git a/example-server.conf b/example-server.conf
index e0b3ea550a3f3167ce3d21968cef17753228ce07..e4484d1979be89686882e3c1e89d9766ad654b02 100644
--- a/example-server.conf
+++ b/example-server.conf
@@ -23,7 +23,6 @@ auth {
provider = "google" # Oauth provider to use
oauth_client_id = "nnnnnnnnnnnnnnnn.apps.googleusercontent.com" # Oauth client ID
oauth_client_secret = "yyyyyyyyyyyyyyyyyyyyyy" # Oauth client secret
- oauth_callback_url = "https://sshca.example.com/auth/callback" # Oauth callback url
provider_opts {
domain = "example.com" # Oauth-provider specific options
}
diff --git a/server/auth/github/github.go b/server/auth/github/github.go
index 46cf76a97665bad865de69e675824b65d924b4c8..c985eed2578e0e0403bee2c90b1537fccac3d1bf 100644
--- a/server/auth/github/github.go
+++ b/server/auth/github/github.go
@@ -40,7 +40,6 @@ func New(c *config.Auth) (*Config, error) {
config: &oauth2.Config{
ClientID: c.OauthClientID,
ClientSecret: c.OauthClientSecret,
- RedirectURL: c.OauthCallbackURL,
Endpoint: github.Endpoint,
Scopes: []string{
string(githubapi.ScopeUser),
@@ -91,7 +90,8 @@ func (c *Config) Revoke(token *oauth2.Token) error {
}
// StartSession retrieves an authentication endpoint from Github.
-func (c *Config) StartSession(state string) *auth.Session {
+func (c *Config) StartSession(state string, r *http.Request) *auth.Session {
+ c.config.RedirectURL = auth.Oauth2RedirectURL(r)
return &auth.Session{
AuthURL: c.config.AuthCodeURL(state),
}
diff --git a/server/auth/github/github_test.go b/server/auth/github/github_test.go
index 8c51f4f8f13021342f6a93eb87e56ea3c5ca2b16..d9d5f00a5b10e5a4a4ebd96225eb7e5d9b298624 100644
--- a/server/auth/github/github_test.go
+++ b/server/auth/github/github_test.go
@@ -2,6 +2,7 @@ package github
import (
"fmt"
+ "net/http"
"testing"
"github.com/nsheridan/cashier/server/config"
@@ -22,13 +23,11 @@ func TestNew(t *testing.T) {
p, _ := New(&config.Auth{
OauthClientID: oauthClientID,
OauthClientSecret: oauthClientSecret,
- OauthCallbackURL: oauthCallbackURL,
ProviderOpts: map[string]string{"organization": organization},
UsersWhitelist: users,
})
a.Equal(p.config.ClientID, oauthClientID)
a.Equal(p.config.ClientSecret, oauthClientSecret)
- a.Equal(p.config.RedirectURL, oauthCallbackURL)
a.Equal(p.organization, organization)
a.Equal(p.whitelist, map[string]bool{"user": true})
}
@@ -37,7 +36,6 @@ func TestWhitelist(t *testing.T) {
c := &config.Auth{
OauthClientID: oauthClientID,
OauthClientSecret: oauthClientSecret,
- OauthCallbackURL: oauthCallbackURL,
ProviderOpts: map[string]string{"organization": ""},
UsersWhitelist: []string{},
}
@@ -61,7 +59,10 @@ func TestStartSession(t *testing.T) {
a := assert.New(t)
p, _ := newGithub()
- s := p.StartSession("test_state")
+ r := &http.Request{
+ Host: oauthCallbackURL,
+ }
+ s := p.StartSession("test_state", r)
a.Contains(s.AuthURL, "github.com/login/oauth/authorize")
a.Contains(s.AuthURL, "state=test_state")
a.Contains(s.AuthURL, fmt.Sprintf("client_id=%s", oauthClientID))
@@ -71,7 +72,6 @@ func newGithub() (*Config, error) {
c := &config.Auth{
OauthClientID: oauthClientID,
OauthClientSecret: oauthClientSecret,
- OauthCallbackURL: oauthCallbackURL,
ProviderOpts: map[string]string{"organization": organization},
}
return New(c)
diff --git a/server/auth/gitlab/gitlab.go b/server/auth/gitlab/gitlab.go
index f76b2e8d75044265371cd2686d9c0202c57c7558..27edafa3109b64267fa6ffbee9fd3cdcde69dda7 100644
--- a/server/auth/gitlab/gitlab.go
+++ b/server/auth/gitlab/gitlab.go
@@ -2,6 +2,7 @@ package gitlab
import (
"errors"
+ "net/http"
"strconv"
"github.com/nsheridan/cashier/server/auth"
@@ -51,7 +52,6 @@ func New(c *config.Auth) (*Config, error) {
config: &oauth2.Config{
ClientID: c.OauthClientID,
ClientSecret: c.OauthClientSecret,
- RedirectURL: c.OauthCallbackURL,
Endpoint: oauth2.Endpoint{
AuthURL: siteURL + "oauth/authorize",
TokenURL: siteURL + "oauth/token",
@@ -110,7 +110,8 @@ func (c *Config) Revoke(token *oauth2.Token) error {
}
// StartSession retrieves an authentication endpoint from Gitlab.
-func (c *Config) StartSession(state string) *auth.Session {
+func (c *Config) StartSession(state string, r *http.Request) *auth.Session {
+ c.config.RedirectURL = auth.Oauth2RedirectURL(r)
return &auth.Session{
AuthURL: c.config.AuthCodeURL(state),
}
diff --git a/server/auth/gitlab/gitlab_test.go b/server/auth/gitlab/gitlab_test.go
index 39c2701245372b0775778a20e9afce28ab36706b..676cda29ecbe6596e47cc273f749c5ccf671411d 100644
--- a/server/auth/gitlab/gitlab_test.go
+++ b/server/auth/gitlab/gitlab_test.go
@@ -2,6 +2,7 @@ package gitlab
import (
"fmt"
+ "net/http"
"testing"
"github.com/nsheridan/cashier/server/auth"
@@ -25,7 +26,6 @@ func TestNew(t *testing.T) {
g := p.(*Config)
a.Equal(g.config.ClientID, oauthClientID)
a.Equal(g.config.ClientSecret, oauthClientSecret)
- a.Equal(g.config.RedirectURL, oauthCallbackURL)
}
func TestNewBrokenSiteURL(t *testing.T) {
@@ -55,7 +55,10 @@ func TestGoodAllUsers(t *testing.T) {
a := assert.New(t)
p, _ := newGitlab()
- s := p.StartSession("test_state")
+ r := &http.Request{
+ Host: oauthCallbackURL,
+ }
+ s := p.StartSession("test_state", r)
a.Contains(s.AuthURL, "exampleorg/oauth/authorize")
a.Contains(s.AuthURL, "state=test_state")
a.Contains(s.AuthURL, fmt.Sprintf("client_id=%s", oauthClientID))
@@ -77,7 +80,10 @@ func TestStartSession(t *testing.T) {
a := assert.New(t)
p, _ := newGitlab()
- s := p.StartSession("test_state")
+ r := &http.Request{
+ Host: oauthCallbackURL,
+ }
+ s := p.StartSession("test_state", r)
a.Contains(s.AuthURL, "exampleorg/oauth/authorize")
a.Contains(s.AuthURL, "state=test_state")
a.Contains(s.AuthURL, fmt.Sprintf("client_id=%s", oauthClientID))
@@ -87,7 +93,6 @@ func newGitlab() (auth.Provider, error) {
c := &config.Auth{
OauthClientID: oauthClientID,
OauthClientSecret: oauthClientSecret,
- OauthCallbackURL: oauthCallbackURL,
ProviderOpts: map[string]string{
"group": group,
"siteurl": siteurl,
diff --git a/server/auth/google/google.go b/server/auth/google/google.go
index 8c6f53bda128ff0893a2825eff70819e5b9e1f71..305b6f4133de3137038f2548c298e52274231bc9 100644
--- a/server/auth/google/google.go
+++ b/server/auth/google/google.go
@@ -43,7 +43,6 @@ func New(c *config.Auth) (*Config, error) {
config: &oauth2.Config{
ClientID: c.OauthClientID,
ClientSecret: c.OauthClientSecret,
- RedirectURL: c.OauthCallbackURL,
Endpoint: google.Endpoint,
Scopes: []string{googleapi.UserinfoEmailScope, googleapi.UserinfoProfileScope},
},
@@ -101,7 +100,8 @@ func (c *Config) Revoke(token *oauth2.Token) error {
}
// StartSession retrieves an authentication endpoint from Google.
-func (c *Config) StartSession(state string) *auth.Session {
+func (c *Config) StartSession(state string, r *http.Request) *auth.Session {
+ c.config.RedirectURL = auth.Oauth2RedirectURL(r)
return &auth.Session{
AuthURL: c.config.AuthCodeURL(state, oauth2.SetAuthURLParam("hd", c.domain)),
}
diff --git a/server/auth/google/google_test.go b/server/auth/google/google_test.go
index b3d26334a9224b79612ed3cc915e26ece47eded7..4d6191b89dbf0aef3ef4d26f21ed9359be4cfdbe 100644
--- a/server/auth/google/google_test.go
+++ b/server/auth/google/google_test.go
@@ -2,6 +2,7 @@ package google
import (
"fmt"
+ "net/http"
"testing"
"github.com/nsheridan/cashier/server/config"
@@ -22,7 +23,6 @@ func TestNew(t *testing.T) {
a.NoError(err)
a.Equal(p.config.ClientID, oauthClientID)
a.Equal(p.config.ClientSecret, oauthClientSecret)
- a.Equal(p.config.RedirectURL, oauthCallbackURL)
a.Equal(p.domain, domain)
a.Equal(p.whitelist, map[string]bool{"user": true})
}
@@ -31,7 +31,6 @@ func TestWhitelist(t *testing.T) {
c := &config.Auth{
OauthClientID: oauthClientID,
OauthClientSecret: oauthClientSecret,
- OauthCallbackURL: oauthCallbackURL,
ProviderOpts: map[string]string{"domain": ""},
UsersWhitelist: []string{},
}
@@ -56,7 +55,10 @@ func TestStartSession(t *testing.T) {
p, err := newGoogle()
a.NoError(err)
- s := p.StartSession("test_state")
+ r := &http.Request{
+ Host: oauthCallbackURL,
+ }
+ s := p.StartSession("test_state", r)
a.Contains(s.AuthURL, "accounts.google.com/o/oauth2/auth")
a.Contains(s.AuthURL, "state=test_state")
a.Contains(s.AuthURL, fmt.Sprintf("hd=%s", domain))
@@ -67,7 +69,6 @@ func newGoogle() (*Config, error) {
c := &config.Auth{
OauthClientID: oauthClientID,
OauthClientSecret: oauthClientSecret,
- OauthCallbackURL: oauthCallbackURL,
ProviderOpts: map[string]string{"domain": domain},
UsersWhitelist: users,
}
diff --git a/server/auth/provider.go b/server/auth/provider.go
index 06dc1c9a0b2111ea9f9bc4e66c1c038cb1013523..d4a8e58aef5c84bf645dee56b8fcc1e7415470a6 100644
--- a/server/auth/provider.go
+++ b/server/auth/provider.go
@@ -1,11 +1,16 @@
package auth
-import "golang.org/x/oauth2"
+import (
+ "fmt"
+ "net/http"
+
+ "golang.org/x/oauth2"
+)
// Provider is an abstraction of different auth methods.
type Provider interface {
Name() string
- StartSession(string) *Session
+ StartSession(string, *http.Request) *Session
Exchange(string) (*oauth2.Token, error)
Username(*oauth2.Token) string
Valid(*oauth2.Token) bool
@@ -28,3 +33,12 @@ func (s *Session) Authorize(provider Provider, code string) error {
s.Token = t
return nil
}
+
+// Oauth2RedirectURL returns an OAuth redirect_uri for this request.
+func Oauth2RedirectURL(r *http.Request) string {
+ protocol := "http"
+ if r.TLS != nil {
+ protocol = "https"
+ }
+ return fmt.Sprintf("%s://%s/auth/callback", protocol, r.Host)
+}
diff --git a/server/auth/provider_test.go b/server/auth/provider_test.go
new file mode 100644
index 0000000000000000000000000000000000000000..e35dcea954e626e5533679425cee9f68434fa79f
--- /dev/null
+++ b/server/auth/provider_test.go
@@ -0,0 +1,30 @@
+package auth
+
+import (
+ "crypto/tls"
+ "net/http"
+ "testing"
+)
+
+func TestHTTP(t *testing.T) {
+ want := "http://example.com/auth/callback"
+ r := &http.Request{
+ Host: "example.com",
+ }
+ ret := Oauth2RedirectURL(r)
+ if want != ret {
+ t.Errorf("Wanted %s, got %s", want, ret)
+ }
+}
+
+func TestHTTPS(t *testing.T) {
+ want := "https://example.com/auth/callback"
+ r := &http.Request{
+ Host: "example.com",
+ TLS: &tls.ConnectionState{},
+ }
+ ret := Oauth2RedirectURL(r)
+ if want != ret {
+ t.Errorf("Wanted %s, got %s", want, ret)
+ }
+}
diff --git a/server/auth/testprovider/testprovider.go b/server/auth/testprovider/testprovider.go
index e30b04aaa58e8cae689cb47b6b992ead3ebe02f4..0bc2397bf4f2044dc71ef5224d13f8f0403154e7 100644
--- a/server/auth/testprovider/testprovider.go
+++ b/server/auth/testprovider/testprovider.go
@@ -1,6 +1,7 @@
package testprovider
import (
+ "net/http"
"time"
"github.com/nsheridan/cashier/server/auth"
@@ -38,7 +39,7 @@ func (c *Config) Revoke(token *oauth2.Token) error {
}
// StartSession retrieves an authentication endpoint.
-func (c *Config) StartSession(state string) *auth.Session {
+func (c *Config) StartSession(state string, r *http.Request) *auth.Session {
return &auth.Session{
AuthURL: "https://www.example.com/auth",
}
diff --git a/server/config/config.go b/server/config/config.go
index 422a135e8d8dd71c35d63f1dc5ad417399484ebd..794ba8a710bd0300b96fd1a77ea1b7711de659c8 100644
--- a/server/config/config.go
+++ b/server/config/config.go
@@ -43,7 +43,6 @@ type Server struct {
type Auth struct {
OauthClientID string `hcl:"oauth_client_id"`
OauthClientSecret string `hcl:"oauth_client_secret"`
- OauthCallbackURL string `hcl:"oauth_callback_url"`
Provider string `hcl:"provider"`
ProviderOpts map[string]string `hcl:"provider_opts"`
UsersWhitelist []string `hcl:"users_whitelist"`
diff --git a/server/config/config_test.go b/server/config/config_test.go
index 5536a4e9eae756b0daa8e35da918fd69b8166efe..e247917e5d04f0667304e0dca1aa89f98ec8775b 100644
--- a/server/config/config_test.go
+++ b/server/config/config_test.go
@@ -23,7 +23,6 @@ var (
Auth: &Auth{
OauthClientID: "client_id",
OauthClientSecret: "secret",
- OauthCallbackURL: "https://sshca.example.com/auth/callback",
Provider: "google",
ProviderOpts: map[string]string{"domain": "example.com"},
UsersWhitelist: []string{"a_user"},
diff --git a/server/config/testdata/test.config b/server/config/testdata/test.config
index 96899e725c869f26dca4cba8a6fe6aee18bc6dc4..6584add405b7c7840f5492912fb976af99cd2c14 100644
--- a/server/config/testdata/test.config
+++ b/server/config/testdata/test.config
@@ -19,7 +19,6 @@ auth {
provider = "google"
oauth_client_id = "client_id"
oauth_client_secret = "secret"
- oauth_callback_url = "https://sshca.example.com/auth/callback"
provider_opts {
domain = "example.com"
}