WIP: auth flow

mplexer/cmd/mgmt/acmeroutes.go

@@ -2,8 +2,9 @@ package main
 
 import (
 	"encoding/json"
+	"fmt"
 	"net/http"
-	"time"
+	"strings"
 
 	"github.com/go-acme/lego/v3/challenge"
 	"github.com/go-chi/chi"
@@ -32,32 +33,16 @@ func (p *acmeProvider) CleanUp(domain, token, keyAuth string) error {
 
 func handleDNSRoutes(r chi.Router) {
 	r.Route("/dns", func(r chi.Router) {
-		r.Use(func(next http.Handler) http.Handler {
-			return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-				ctx := r.Context()
-				valid, _ := ctx.Value(MWKey("valid")).(bool)
-
-				if !valid {
-					// misdirection
-					time.Sleep(250 * time.Millisecond)
-					w.Write([]byte("{\"success\":true}\n"))
-					//http.Error(w, `{"error":"could not verify token"}`, http.StatusBadRequest)
-					return
-				}
-				/*
-				   if nil != err2 {
-				     // a little misdirection there
-				     msg := `{"error":"internal server error"}`
-				     http.Error(w, msg, http.StatusInternalServerError)
-				     return
-				   }
-				*/
-
-				next.ServeHTTP(w, r.WithContext(ctx))
-			})
-		})
-
 		r.Post("/{domain}", func(w http.ResponseWriter, r *http.Request) {
+			domain := chi.URLParam(r, "domain")
+
+			ctx := r.Context()
+			claims, ok := ctx.Value(MWKey("claims")).(*MgmtClaims)
+			if !ok || !strings.HasPrefix(domain+".", claims.Slug) {
+				msg := `{ "error": "invalid domain" }`
+				http.Error(w, msg+"\n", http.StatusUnprocessableEntity)
+				return
+			}
 
 			ch := Challenge{}
 
@@ -70,7 +55,6 @@ func handleDNSRoutes(r chi.Router) {
 				return
 			}
 
-			domain := chi.URLParam(r, "domain")
 			//domain := chi.URLParam(r, "*")
 			ch.Domain = domain
 
@@ -80,7 +64,8 @@ func handleDNSRoutes(r chi.Router) {
 			presenters <- &ch
 			err = <-ch.error
 			if nil != err || "" == ch.Token || "" == ch.KeyAuth {
-				msg := `{"error":"expected json in the format {\"token\":\"xxx\",\"key_authorization\":\"yyy\"}"}`
+				fmt.Println("presenter err", err, ch.Token, ch.KeyAuth)
+				msg := `{"error":"ACME dns-01 error"}`
 				http.Error(w, msg, http.StatusUnprocessableEntity)
 				return
 			}
@@ -90,6 +75,7 @@ func handleDNSRoutes(r chi.Router) {
 
 		// TODO ugly Delete, but whatever
 		r.Delete("/{domain}/{token}/{keyAuth}", func(w http.ResponseWriter, r *http.Request) {
+			// TODO authenticate
 
 			ch := Challenge{
 				Domain:  chi.URLParam(r, "domain"),

mplexer/cmd/mgmt/acmeroutes.go.bak

@@ -0,0 +1,24 @@
+		r.Use(func(next http.Handler) http.Handler {
+			return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+				ctx := r.Context()
+				valid, _ := ctx.Value(MWKey("valid")).(bool)
+
+				if !valid {
+					// misdirection
+					time.Sleep(250 * time.Millisecond)
+					w.Write([]byte("{\"success\":true}\n"))
+					//http.Error(w, `{"error":"could not verify token"}`, http.StatusBadRequest)
+					return
+				}
+				/*
+				   if nil != err2 {
+				     // a little misdirection there
+				     msg := `{"error":"internal server error"}`
+				     http.Error(w, msg, http.StatusInternalServerError)
+				     return
+				   }
+				*/
+
+				next.ServeHTTP(w, r.WithContext(ctx))
+			})
+		})

mplexer/cmd/mgmt/devices.go

@@ -1,7 +1,10 @@
 package main
 
 import (
+	"crypto/rand"
+	"encoding/base64"
 	"encoding/json"
+	"fmt"
 	"log"
 	"net/http"
 	"time"
@@ -12,18 +15,29 @@ import (
 
 func handleDeviceRoutes(r chi.Router) {
 	r.Route("/devices", func(r chi.Router) {
-		// TODO needs admin auth
+		// only the admin can get past this point
-		// r.Use() // must have slug '*'
+		r.Use(func(next http.Handler) http.Handler {
+			return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+				ctx := r.Context()
+				claims, ok := ctx.Value(MWKey("claims")).(*MgmtClaims)
+				if !ok || "*" != claims.Slug {
+					msg := `{"error":"missing or invalid authorization token"}`
+					http.Error(w, msg+"\n", http.StatusUnprocessableEntity)
+					return
+				}
+
+				next.ServeHTTP(w, r.WithContext(ctx))
+			})
+		})
 
 		r.Post("/", func(w http.ResponseWriter, r *http.Request) {
-
 			auth := &authstore.Authorization{}
+
+			// Slug is mandatory, ID and MachinePPID must NOT be set
 			decoder := json.NewDecoder(r.Body)
 			err := decoder.Decode(&auth)
-			// Slug is mandatory, ID and MachinePPID must NOT be set
 			epoch := time.Time{}
-			if nil != err || "" != auth.ID || "" != auth.MachinePPID ||
+			if nil != err || "" != auth.ID || "" != auth.MachinePPID || "" == auth.Slug ||
-				"" == auth.Slug || "" == auth.SharedKey ||
 				epoch != auth.CreatedAt || epoch != auth.UpdatedAt || epoch != auth.DeletedAt {
 				result, _ := json.Marshal(&authstore.Authorization{})
 				msg, _ := json.Marshal(&struct {
@@ -35,18 +49,46 @@ func handleDeviceRoutes(r chi.Router) {
 				return
 			}
 
+			if "" == auth.SharedKey {
+				rnd := make([]byte, 16)
+				if _, err := rand.Read(rnd); nil != err {
+					panic(err)
+				}
+				auth.SharedKey = base64.RawURLEncoding.EncodeToString(rnd)
+			}
+			if len(auth.SharedKey) < 20 {
+				msg := `{"error":"shared_key must be >= 16 bytes"}`
+				http.Error(w, string(msg), http.StatusUnprocessableEntity)
+				return
+			}
+
+			pub := authstore.ToPublicKeyString(auth.SharedKey)
+			if "" == auth.PublicKey {
+				auth.PublicKey = pub
+			}
+			if len(auth.PublicKey) > 24 {
+				auth.PublicKey = auth.PublicKey[:24]
+			}
+			if pub != auth.PublicKey {
+				msg := `{"error":"public_key must be the first 24 bytes of the base64-encoded hash of the shared_key"}`
+				http.Error(w, msg+"\n", http.StatusUnprocessableEntity)
+				return
+			}
+
 			err = store.Add(auth)
 			if nil != err {
 				msg := `{"error":"not really sure what happened, but it didn't go well (check the logs)"}`
-				log.Printf("/api/devices/\n", auth.Slug)
+				if authstore.ErrExists == err {
+					msg = fmt.Sprintf(`{ "error": "%s" }`, err.Error())
+				}
+				log.Printf("/api/devices/\n")
 				log.Println(err)
 				http.Error(w, msg, http.StatusInternalServerError)
 				return
 			}
 
-			//auth.SharedKey = "[redacted]"
 			result, _ := json.Marshal(auth)
-			w.Write(result)
+			w.Write([]byte(string(result) + "\n"))
 		})
 
 		r.Get("/{slug}", func(w http.ResponseWriter, r *http.Request) {
@@ -69,7 +111,7 @@ func handleDeviceRoutes(r chi.Router) {
 				auth.SharedKey = "[redacted]"
 			}
 			result, _ := json.Marshal(auth)
-			w.Write(result)
+			w.Write([]byte(string(result) + "\n"))
 		})
 
 		r.Delete("/{slug}", func(w http.ResponseWriter, r *http.Request) {
@@ -83,7 +125,7 @@ func handleDeviceRoutes(r chi.Router) {
 				return
 			}
 
-			w.Write([]byte("{\"success\":true}\n"))
+			w.Write([]byte(`{"success":true}` + "\n"))
 		})
 	})
 

mplexer/cmd/mgmt/route.go

@@ -65,6 +65,7 @@ func routeAll() chi.Router {
 					tokenString,
 					&MgmtClaims{},
 					func(token *jwt.Token) (interface{}, error) {
+						fmt.Println("parsed jwt", token)
 						kid, ok := token.Header["kid"].(string)
 						if !ok {
 							return nil, fmt.Errorf("missing jwt header 'kid' (key id)")
@@ -101,20 +102,27 @@ func routeAll() chi.Router {
 							return []byte(auth.SharedKey), nil
 						*/
 
+						fmt.Println("ppid:", auth.MachinePPID)
+
 						return []byte(auth.MachinePPID), nil
 					},
 				)
 
-				var ctx context.Context
+				ctx := r.Context()
-				if nil != tok {
-					ctx = context.WithValue(r.Context(), MWKey("token"), tok)
-					if tok.Valid {
-						ctx = context.WithValue(r.Context(), MWKey("valid"), nil != tok)
-					}
-				}
 				if nil != err {
-					ctx = context.WithValue(r.Context(), MWKey("error"), nil != tok)
+					fmt.Println("auth err", err)
+					ctx = context.WithValue(ctx, MWKey("error"), err)
 				}
+				if nil != tok {
+					fmt.Println("any auth?", tok)
+					if tok.Valid {
+						ctx = context.WithValue(ctx, MWKey("token"), tok)
+						ctx = context.WithValue(ctx, MWKey("claims"), tok.Claims)
+						ctx = context.WithValue(ctx, MWKey("valid"), true)
+					}
+				}
+				fmt.Println("Good Auth?")
+				fmt.Println(ctx.Value(MWKey("claims")))
 
 				next.ServeHTTP(w, r.WithContext(ctx))
 			})
@@ -156,6 +164,16 @@ func routeAll() chi.Router {
 				}
 
 				// TODO hash the PPID and check against the Public Key?
+				pub := authstore.ToPublicKeyString(auth.MachinePPID)
+				if pub != auth.PublicKey {
+					msg, _ := json.Marshal(&struct {
+						Error string `json:"error"`
+					}{
+						Error: "expected `public_key` to be the first 24 bytes of the hash of the `machine_ppid`",
+					})
+					http.Error(w, string(msg), http.StatusUnprocessableEntity)
+					return
+				}
 				original.PublicKey = auth.PublicKey
 				original.MachinePPID = auth.MachinePPID
 				err = store.Set(original)
@@ -172,8 +190,30 @@ func routeAll() chi.Router {
 			})
 		})
 
+		r.Post("/ping", func(w http.ResponseWriter, r *http.Request) {
+			ctx := r.Context()
+			claims, ok := ctx.Value(MWKey("claims")).(*MgmtClaims)
+			if !ok {
+				msg := `{"error":"failure to ping: 1"}`
+				fmt.Println("touch no claims", claims)
+				http.Error(w, msg+"\n", http.StatusBadRequest)
+				return
+			}
+
+			fmt.Println("ping pong??", claims)
+			err := store.Touch(claims.Slug)
+			if nil != err {
+				msg := `{"error":"failure to ping: 2"}`
+				fmt.Println("touch err", err)
+				http.Error(w, msg+"\n", http.StatusBadRequest)
+				return
+			}
+
+			w.Write([]byte(`{ "success": true }` + "\n"))
+		})
+
 		r.Get("/", func(w http.ResponseWriter, r *http.Request) {
-			w.Write([]byte("welcome\n"))
+			w.Write([]byte("Hello\n"))
 		})
 	})
 

mplexer/cmd/signjwt/signjwt.go

@@ -1,9 +1,16 @@
 package main
 
 import (
+	"crypto/rand"
+	"encoding/base64"
+	"encoding/hex"
 	"fmt"
 	"os"
+	"time"
 
+	"git.coolaj86.com/coolaj86/go-telebitd/mplexer/mgmt/authstore"
+
+	"github.com/denisbrodbeck/machineid"
 	jwt "github.com/dgrijalva/jwt-go"
 	_ "github.com/joho/godotenv/autoload"
 )
@@ -11,7 +18,7 @@ import (
 func main() {
 	var secret string
 
-	if len(os.Args) == 2 {
+	if len(os.Args) >= 2 {
 		secret = os.Args[1]
 	}
 	if "" == secret {
@@ -23,7 +30,28 @@ func main() {
 		return
 	}
 
-	tok, err := getToken(secret, []string{})
+	if len(os.Args) >= 3 {
+		muid, err := machineid.ProtectedID("test-id|" + secret)
+		if nil != err {
+			panic(err)
+		}
+		muidBytes, _ := hex.DecodeString(muid)
+		muid = base64.RawURLEncoding.EncodeToString(muidBytes)
+		fmt.Println(
+			muid,
+			authstore.ToPublicKeyString(muid),
+		)
+		return
+	}
+
+	b := make([]byte, 16)
+	_, _ = rand.Read(b)
+	claims := &jwt.StandardClaims{
+		Id:        base64.RawURLEncoding.EncodeToString(b),
+		IssuedAt:  time.Now().Unix(),
+		ExpiresAt: time.Now().Add(5 * time.Minute).Unix(),
+	}
+	tok, err := getToken(secret, claims)
 	if nil != err {
 		fmt.Fprintf(os.Stderr, "signing error: %s", err)
 		os.Exit(1)
@@ -33,10 +61,22 @@ func main() {
 	fmt.Println(tok)
 }
 
-func getToken(secret string, domains []string) (token string, err error) {
+func getToken(secret string, tokenData *jwt.StandardClaims) (token string, err error) {
-	tokenData := jwt.MapClaims{"domains": domains}
+	keyID := authstore.ToPublicKeyString(secret)
+
+	fmt.Fprintf(os.Stderr, "secret: %s\n", secret)
+	fmt.Fprintf(os.Stderr, "kid: %s\n", keyID)
+
+	jwtToken := &jwt.Token{
+		Header: map[string]interface{}{
+			"kid": keyID,
+			"typ": "JWT",
+			"alg": jwt.SigningMethodHS256.Alg(),
+		},
+		Claims: tokenData,
+		Method: jwt.SigningMethodHS256,
+	}
 
-	jwtToken := jwt.NewWithClaims(jwt.SigningMethodHS256, tokenData)
 	if token, err = jwtToken.SignedString([]byte(secret)); err != nil {
 		return "", err
 	}

mplexer/mgmt/authstore/authstore.go

@@ -1,9 +1,14 @@
 package authstore
 
 import (
+	"crypto/sha256"
+	"encoding/base64"
+	"errors"
 	"time"
 )
 
+var ErrExists = errors.New("token already exists")
+
 type Authorization struct {
 	ID string `db:"id,omitempty" json:"-"`
 
@@ -21,9 +26,19 @@ type Store interface {
 	SetMaster(secret string) error
 	Add(auth *Authorization) error
 	Set(auth *Authorization) error
+	Touch(id string) error
 	Get(id string) (*Authorization, error)
 	GetBySlug(id string) (*Authorization, error)
 	GetByPub(id string) (*Authorization, error)
 	Delete(auth *Authorization) error
 	Close() error
 }
+
+func ToPublicKeyString(secret string) string {
+	pubBytes := sha256.Sum256([]byte(secret))
+	pub := base64.RawURLEncoding.EncodeToString(pubBytes[:])
+	if len(pub) > 24 {
+		pub = pub[:24]
+	}
+	return pub
+}

mplexer/mgmt/authstore/postgresql.go

@@ -90,6 +90,7 @@ func (s *PGStore) Add(auth *Authorization) error {
 			SELECT slug FROM authorizations WHERE deleted_at = '1970-01-01 00:00:00' AND slug = $1
 		)
 	`
+	now := time.Now()
 	res, err := tx.ExecContext(ctx, query2, auth.Slug, auth.SharedKey, auth.PublicKey)
 	if nil != err {
 		return err
@@ -97,13 +98,16 @@ func (s *PGStore) Add(auth *Authorization) error {
 
 	// PostgreSQL does support RowsAffected(), but not LastInsertId()
 	if count, _ := res.RowsAffected(); count != 1 {
-		return fmt.Errorf("record not added (probably exists)")
+		// TODO be more sure?
+		return ErrExists // fmt.Errorf("record not added (probably exists)")
 	}
 
 	if err := tx.Commit(); nil != err {
 		return err
 	}
 
+	auth.CreatedAt = now
+	auth.UpdatedAt = now
 	return nil
 }
 
@@ -112,9 +116,10 @@ func (s *PGStore) Set(auth *Authorization) error {
 	defer done()
 	query := `
 		UPDATE authorizations SET
-			machine_ppid=$1,
+			machine_ppid = $1,
-			shared_key=$2,
+			shared_key = $2,
-			public_key=$3
+			public_key = $3,
+			updated_at = 'now'
 		WHERE
 			deleted_at = '1970-01-01 00:00:00'
 				AND shared_key = $2
@@ -131,6 +136,26 @@ func (s *PGStore) Set(auth *Authorization) error {
 	return nil
 }
 
+func (s *PGStore) Touch(pub string) error {
+	ctx, done := context.WithDeadline(context.Background(), time.Now().Add(5*time.Second))
+	defer done()
+	query := `
+		UPDATE authorizations SET
+			updated_at = 'now'
+		WHERE deleted_at = '1970-01-01 00:00:00'
+			AND (public_key = $1 OR slug = $1)
+	`
+	row, err := s.dbx.ExecContext(ctx, query, pub)
+	if nil != err {
+		return err
+	}
+	// PostgreSQL does support RowsAffected()
+	if count, _ := row.RowsAffected(); count != 1 {
+		return fmt.Errorf("record was not updated")
+	}
+	return nil
+}
+
 func (s *PGStore) Get(id string) (*Authorization, error) {
 	ctx, done := context.WithDeadline(context.Background(), time.Now().Add(5*time.Second))
 	defer done()
@@ -194,7 +219,7 @@ func (s *PGStore) Delete(auth *Authorization) error {
 	}
 	// PostgreSQL does support RowsAffected()
 	if count, _ := row.RowsAffected(); count != 1 {
-		return fmt.Errorf("record exists")
+		return fmt.Errorf("record does not exist")
 	}
 	return nil
 }