support hashed credentials

pkg/auth/package_test.go

@@ -9,7 +9,8 @@ import (
 	"github.com/aler9/gortsplib/pkg/headers"
 )
 
-var casesAuth = []struct {
+func TestAuth(t *testing.T) {
+	for _, c1 := range []struct {
 		name    string
 		methods []headers.AuthMethod
 	}{
@@ -25,25 +26,55 @@ var casesAuth = []struct {
 			"both",
 			[]headers.AuthMethod{headers.AuthBasic, headers.AuthDigest},
 		},
+	} {
+		for _, conf := range []string{
+			"nofail",
+			"wronguser",
+			"wrongpass",
+			"wrongurl",
+		} {
+			if conf == "wrongurl" && c1.name == "basic" {
+				continue
 			}
 
-func TestAuthMethods(t *testing.T) {
-	for _, c := range casesAuth {
-		t.Run(c.name, func(t *testing.T) {
-			va := NewValidator("testuser", "testpass", c.methods)
+			t.Run(c1.name+"_"+conf, func(t *testing.T) {
+				va := NewValidator("testuser", "testpass", c1.methods)
 				wwwAuthenticate := va.GenerateHeader()
 
-			se, err := NewSender(wwwAuthenticate, "testuser", "testpass")
+				se, err := NewSender(wwwAuthenticate,
+					func() string {
+						if conf == "wronguser" {
+							return "test1user"
+						}
+						return "testuser"
+					}(),
+					func() string {
+						if conf == "wrongpass" {
+							return "test1pass"
+						}
+						return "testpass"
+					}())
 				require.NoError(t, err)
 				authorization := se.GenerateHeader(base.Announce,
-				base.MustParseURL("rtsp://myhost/mypath"))
+					base.MustParseURL(func() string {
+						if conf == "wrongurl" {
+							return "rtsp://myhost/my1path"
+						}
+						return "rtsp://myhost/mypath"
+					}()))
 
 				err = va.ValidateHeader(authorization, base.Announce,
 					base.MustParseURL("rtsp://myhost/mypath"))
+
+				if conf != "nofail" {
+					require.Error(t, err)
+				} else {
 					require.NoError(t, err)
+				}
 			})
 		}
 	}
+}
 
 func TestAuthVLC(t *testing.T) {
 	for _, ca := range []struct {
@@ -59,16 +90,56 @@ func TestAuthVLC(t *testing.T) {
 			"rtsp://myhost/mypath/test?testing/trackID=0",
 		},
 	} {
-		se := NewValidator("testuser", "testpass",
+		va := NewValidator("testuser", "testpass",
 			[]headers.AuthMethod{headers.AuthBasic, headers.AuthDigest})
 
-		va, err := NewSender(se.GenerateHeader(), "testuser", "testpass")
+		se, err := NewSender(va.GenerateHeader(), "testuser", "testpass")
 		require.NoError(t, err)
-		authorization := va.GenerateHeader(base.Announce,
+		authorization := se.GenerateHeader(base.Announce,
 			base.MustParseURL(ca.clientURL))
 
-		err = se.ValidateHeader(authorization, base.Announce,
+		err = va.ValidateHeader(authorization, base.Announce,
 			base.MustParseURL(ca.serverURL))
 		require.NoError(t, err)
 	}
 }
+
+func TestAuthHashed(t *testing.T) {
+	for _, conf := range []string{
+		"nofail",
+		"wronguser",
+		"wrongpass",
+	} {
+		t.Run(conf, func(t *testing.T) {
+			se := NewValidator("sha256:rl3rgi4NcZkpAEcacZnQ2VuOfJ0FxAqCRaKB/SwdZoQ=",
+				"sha256:E9JJ8stBJ7QM+nV4ZoUCeHk/gU3tPFh/5YieiJp6n2w=",
+				[]headers.AuthMethod{headers.AuthBasic, headers.AuthDigest})
+
+			va, err := NewSender(se.GenerateHeader(),
+				func() string {
+					if conf == "wronguser" {
+						return "test1user"
+					}
+					return "testuser"
+				}(),
+				func() string {
+					if conf == "wrongpass" {
+						return "test1pass"
+					}
+					return "testpass"
+				}())
+			require.NoError(t, err)
+			authorization := va.GenerateHeader(base.Announce,
+				base.MustParseURL("rtsp://myhost/mypath"))
+
+			err = se.ValidateHeader(authorization, base.Announce,
+				base.MustParseURL("rtsp://myhost/mypath"))
+
+			if conf != "nofail" {
+				require.Error(t, err)
+			} else {
+				require.NoError(t, err)
+			}
+		})
+	}
+}

pkg/auth/sender.go

@@ -9,7 +9,7 @@ import (
 	"github.com/aler9/gortsplib/pkg/headers"
 )
 
-// Sender is an object that allows a client to send credentials to a server.
+// Sender allows to generate credentials for a Validator.
 type Sender struct {
 	user   string
 	pass   string
@@ -19,7 +19,7 @@ type Sender struct {
 }
 
 // NewSender allocates a Sender with the WWW-Authenticate header provided by
-// the server and a set of credentials.
+// a Validator and a set of credentials.
 func NewSender(v base.HeaderValue, user string, pass string) (*Sender, error) {
 	// prefer digest
 	if headerAuthDigest := func() string {

pkg/auth/utils.go

@@ -2,6 +2,8 @@ package auth
 
 import (
 	"crypto/md5"
+	"crypto/sha256"
+	"encoding/base64"
 	"encoding/hex"
 )
 
@@ -10,3 +12,9 @@ func md5Hex(in string) string {
 	h.Write([]byte(in))
 	return hex.EncodeToString(h.Sum(nil))
 }
+
+func sha256Base64(in string) string {
+	h := sha256.New()
+	h.Write([]byte(in))
+	return base64.StdEncoding.EncodeToString(h.Sum(nil))
+}

pkg/auth/validator.go

@@ -11,10 +11,12 @@ import (
 	"github.com/aler9/gortsplib/pkg/headers"
 )
 
-// Validator allows a server to validate some credentials sent by a client.
+// Validator allows to validate some credentials generated by a Sender.
 type Validator struct {
 	user       string
+	userHashed bool
 	pass       string
+	passHashed bool
 	methods    []headers.AuthMethod
 	realm      string
 	nonce      string
@@ -27,13 +29,36 @@ func NewValidator(user string, pass string, methods []headers.AuthMethod) *Valid
 		methods = []headers.AuthMethod{headers.AuthBasic, headers.AuthDigest}
 	}
 
+	userHashed := false
+	if strings.HasPrefix(user, "plain:") {
+		user = strings.TrimPrefix(user, "plain:")
+	} else if strings.HasPrefix(user, "sha256:") {
+		user = strings.TrimPrefix(user, "sha256:")
+		userHashed = true
+	}
+
+	passHashed := false
+	if strings.HasPrefix(pass, "plain:") {
+		pass = strings.TrimPrefix(pass, "plain:")
+	} else if strings.HasPrefix(pass, "sha256:") {
+		pass = strings.TrimPrefix(pass, "sha256:")
+		passHashed = true
+	}
+
+	// if credentials are hashed, only basic auth is supported
+	if userHashed || passHashed {
+		methods = []headers.AuthMethod{headers.AuthBasic}
+	}
+
 	nonceByts := make([]byte, 16)
 	rand.Read(nonceByts)
 	nonce := hex.EncodeToString(nonceByts)
 
 	return &Validator{
 		user:       user,
+		userHashed: userHashed,
 		pass:       pass,
+		passHashed: passHashed,
 		methods:    methods,
 		realm:      "IPCAM",
 		nonce:      nonce,
@@ -78,11 +103,35 @@ func (va *Validator) ValidateHeader(v base.HeaderValue, method base.Method, ur *
 	if strings.HasPrefix(v0, "Basic ") {
 		inResponse := v0[len("Basic "):]
 
-		response := base64.StdEncoding.EncodeToString([]byte(va.user + ":" + va.pass))
-
-		if inResponse != response {
+		tmp, err := base64.StdEncoding.DecodeString(inResponse)
+		if err != nil {
 			return fmt.Errorf("wrong response")
 		}
+		tmp2 := strings.Split(string(tmp), ":")
+		if len(tmp2) != 2 {
+			return fmt.Errorf("wrong response")
+		}
+		user, pass := tmp2[0], tmp2[1]
+
+		if !va.userHashed {
+			if user != va.user {
+				return fmt.Errorf("wrong response")
+			}
+		} else {
+			if sha256Base64(user) != va.user {
+				return fmt.Errorf("wrong response")
+			}
+		}
+
+		if !va.passHashed {
+			if pass != va.pass {
+				return fmt.Errorf("wrong response")
+			}
+		} else {
+			if sha256Base64(pass) != va.pass {
+				return fmt.Errorf("wrong response")
+			}
+		}
 
 	} else if strings.HasPrefix(v0, "Digest ") {
 		auth, err := headers.ReadAuth(base.HeaderValue{v0})