Add JiraRealm type. Add Register() function to AuthRealms

Verify that PrivateKeyPEM is indeed a PEM formatted block in Register()

src/github.com/matrix-org/go-neb/api.go

@@ -98,6 +98,10 @@ func (h *configureAuthRealmHandler) OnIncomingRequest(req *http.Request) (interf
 		return nil, &errors.HTTPError{err, "Error parsing config JSON", 400}
 	}
 
+	if err := realm.Register(); err != nil {
+		return nil, &errors.HTTPError{err, "Error registering auth realm", 400}
+	}
+
 	oldRealm, err := h.db.StoreAuthRealm(realm)
 	if err != nil {
 		return nil, &errors.HTTPError{err, "Error storing realm", 500}

src/github.com/matrix-org/go-neb/goneb.go

@@ -5,6 +5,7 @@ import (
 	"github.com/matrix-org/go-neb/clients"
 	"github.com/matrix-org/go-neb/database"
 	_ "github.com/matrix-org/go-neb/realms/github"
+	_ "github.com/matrix-org/go-neb/realms/jira"
 	"github.com/matrix-org/go-neb/server"
 	_ "github.com/matrix-org/go-neb/services/echo"
 	_ "github.com/matrix-org/go-neb/services/github"

src/github.com/matrix-org/go-neb/realms/github/github.go

@@ -53,6 +53,10 @@ func (r *githubRealm) Type() string {
 	return "github"
 }
 
+func (r *githubRealm) Register() error {
+	return nil
+}
+
 func (r *githubRealm) RequestAuthSession(userID string, req json.RawMessage) interface{} {
 	state, err := randomString(10)
 	if err != nil {

src/github.com/matrix-org/go-neb/realms/jira/jira.go

@@ -0,0 +1,87 @@
+package realms
+
+import (
+	"crypto/rsa"
+	"crypto/x509"
+	"encoding/json"
+	"encoding/pem"
+	"errors"
+	log "github.com/Sirupsen/logrus"
+	"github.com/matrix-org/go-neb/types"
+	"net/http"
+)
+
+type jiraRealm struct {
+	id             string
+	ConsumerName   string
+	ConsumerKey    string
+	ConsumerSecret string
+	PrivateKeyPEM  string
+}
+
+func (r *jiraRealm) ID() string {
+	return r.id
+}
+
+func (r *jiraRealm) Type() string {
+	return "jira"
+}
+
+func (r *jiraRealm) Register() error {
+	if r.ConsumerName == "" || r.ConsumerKey == "" || r.ConsumerSecret == "" || r.PrivateKeyPEM == "" {
+		return errors.New("ConsumerName, ConsumerKey, ConsumerSecret, PrivateKeyPEM must be specified.")
+	}
+	// Make sure the private key PEM is actually a private key.
+	_, err := loadPrivateKey(r.PrivateKeyPEM)
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+func (r *jiraRealm) RequestAuthSession(userID string, req json.RawMessage) interface{} {
+	reqAuth := struct {
+		JIRAURL string
+	}{}
+	if err := json.Unmarshal(req, reqAuth); err != nil {
+		log.WithError(err).Print("Error parsing request JSON")
+		return nil
+	}
+	if reqAuth.JIRAURL == "" {
+		log.Print("Missing JIRAURL")
+		return nil
+	}
+	// TODO: Check to see if JIRA endpoint is valid and known
+	return nil
+}
+
+func (r *jiraRealm) OnReceiveRedirect(w http.ResponseWriter, req *http.Request) {
+
+}
+
+func (r *jiraRealm) AuthSession(id, userID, realmID string) types.AuthSession {
+	return nil
+}
+
+func loadPrivateKey(privKeyPEM string) (*rsa.PrivateKey, error) {
+	// Decode PEM to grab the private key type
+	block, _ := pem.Decode([]byte(privKeyPEM))
+	if block == nil {
+		return nil, errors.New("No PEM formatted block found")
+	}
+
+	// TODO: Handle passwords on private keys.
+	// decBytes, err = x509.DecryptPEMBlock(block, []byte{}) // no pass
+
+	priv, err := x509.ParsePKCS1PrivateKey(block.Bytes)
+	if err != nil {
+		return nil, err
+	}
+	return priv, nil
+}
+
+func init() {
+	types.RegisterAuthRealm(func(realmID string) types.AuthRealm {
+		return &jiraRealm{id: realmID}
+	})
+}

src/github.com/matrix-org/go-neb/types/types.go

@@ -81,6 +81,7 @@ func CreateService(serviceID, serviceType string) Service {
 type AuthRealm interface {
 	ID() string
 	Type() string
+	Register() error
 	OnReceiveRedirect(w http.ResponseWriter, req *http.Request)
 	AuthSession(id, userID, realmID string) AuthSession
 	RequestAuthSession(userID string, config json.RawMessage) interface{}