Protocol: split client session authority

gen/go/protocol/protocol.go

@@ -14,7 +14,7 @@ import (
 	"time"
 )
 
-const SchemaSHA256 = "dea3dd210c53d5a2d37050dd6afd8b0ac5bb8edcb7ab25a02e4026489ce8a00f"
+const SchemaSHA256 = "762d009c3d25d80c3850d975e45f7a6b3fd8adf5c93c8fa7dd11dfa993f8bbb1"
 const ProtocolVersion = "1.0.0"
 const CurrentWireVersion = "2"
 const NMinus1WireVersion = "1"
@@ -97,6 +97,16 @@ type ChannelFrame struct {
 	Payload       string `json:"payload"`
 }
 
+type ClientSessionAuthority struct {
+	Version           string            `json:"version"`
+	SessionID         string            `json:"session_id"`
+	GatewayID         string            `json:"gateway_id"`
+	Audience          string            `json:"audience"`
+	ReconnectSequence int64             `json:"reconnect_sequence"`
+	ExpiresAt         string            `json:"expires_at"`
+	Capabilities      CapabilityProfile `json:"capabilities"`
+}
+
 type ClipboardPolicy struct {
 	ClientToProviderEnabled bool  `json:"client_to_provider_enabled"`
 	ProviderToClientEnabled bool  `json:"provider_to_client_enabled"`
@@ -1233,6 +1243,122 @@ func EncodeChannelFrame(value ChannelFrame) ([]byte, error) {
 	return json.Marshal(value)
 }
 
+func (v ClientSessionAuthority) Validate() error {
+	var violations []FieldViolation
+	if v.Version == "" {
+		violations = append(violations, FieldViolation{Field: "version", Code: "required"})
+	}
+	if v.Version != "1" && v.Version != "" {
+		violations = append(violations, FieldViolation{Field: "version", Code: "invalid_value"})
+	}
+	if v.SessionID == "" {
+		violations = append(violations, FieldViolation{Field: "session_id", Code: "required"})
+	}
+	if len(v.SessionID) < 1 && v.SessionID != "" {
+		violations = append(violations, FieldViolation{Field: "session_id", Code: "min_length"})
+	}
+	if len(v.SessionID) > 128 {
+		violations = append(violations, FieldViolation{Field: "session_id", Code: "max_length"})
+	}
+	if v.GatewayID == "" {
+		violations = append(violations, FieldViolation{Field: "gateway_id", Code: "required"})
+	}
+	if len(v.GatewayID) < 1 && v.GatewayID != "" {
+		violations = append(violations, FieldViolation{Field: "gateway_id", Code: "min_length"})
+	}
+	if len(v.GatewayID) > 128 {
+		violations = append(violations, FieldViolation{Field: "gateway_id", Code: "max_length"})
+	}
+	if v.Audience == "" {
+		violations = append(violations, FieldViolation{Field: "audience", Code: "required"})
+	}
+	if len(v.Audience) < 1 && v.Audience != "" {
+		violations = append(violations, FieldViolation{Field: "audience", Code: "min_length"})
+	}
+	if len(v.Audience) > 256 {
+		violations = append(violations, FieldViolation{Field: "audience", Code: "max_length"})
+	}
+	if v.ReconnectSequence != 0 && v.ReconnectSequence < 0 {
+		violations = append(violations, FieldViolation{Field: "reconnect_sequence", Code: "minimum"})
+	}
+	if v.ExpiresAt == "" {
+		violations = append(violations, FieldViolation{Field: "expires_at", Code: "required"})
+	}
+	if len(v.ExpiresAt) > 64 {
+		violations = append(violations, FieldViolation{Field: "expires_at", Code: "max_length"})
+	}
+	if v.ExpiresAt != "" {
+		if parsed, err := time.Parse(time.RFC3339Nano, v.ExpiresAt); err != nil || parsed.UTC().Format(time.RFC3339Nano) != v.ExpiresAt {
+			violations = append(violations, FieldViolation{Field: "expires_at", Code: "invalid_time"})
+		}
+	}
+	if reflect.DeepEqual(v.Capabilities, CapabilityProfile{}) {
+		violations = append(violations, FieldViolation{Field: "capabilities", Code: "required"})
+	}
+	if err := v.Capabilities.Validate(); err != nil {
+		violations = append(violations, FieldViolation{Field: "capabilities", Code: "invalid_object"})
+	}
+	if len(violations) > 0 {
+		return ValidationError{Violations: violations}
+	}
+	return nil
+}
+
+func DecodeClientSessionAuthority(data []byte) (ClientSessionAuthority, error) {
+	var value ClientSessionAuthority
+	if len(data) > 1024*1024 {
+		return value, errors.New("protocol payload exceeds limit")
+	}
+	var fields map[string]json.RawMessage
+	if err := json.Unmarshal(data, &fields); err != nil {
+		return value, err
+	}
+	if raw, ok := fields["audience"]; !ok || bytes.Equal(bytes.TrimSpace(raw), []byte("null")) {
+		return value, ValidationError{Violations: []FieldViolation{{Field: "audience", Code: "required"}}}
+	}
+	if raw, ok := fields["capabilities"]; !ok || bytes.Equal(bytes.TrimSpace(raw), []byte("null")) {
+		return value, ValidationError{Violations: []FieldViolation{{Field: "capabilities", Code: "required"}}}
+	}
+	if raw, ok := fields["expires_at"]; !ok || bytes.Equal(bytes.TrimSpace(raw), []byte("null")) {
+		return value, ValidationError{Violations: []FieldViolation{{Field: "expires_at", Code: "required"}}}
+	}
+	if raw, ok := fields["gateway_id"]; !ok || bytes.Equal(bytes.TrimSpace(raw), []byte("null")) {
+		return value, ValidationError{Violations: []FieldViolation{{Field: "gateway_id", Code: "required"}}}
+	}
+	if raw, ok := fields["reconnect_sequence"]; !ok || bytes.Equal(bytes.TrimSpace(raw), []byte("null")) {
+		return value, ValidationError{Violations: []FieldViolation{{Field: "reconnect_sequence", Code: "required"}}}
+	}
+	if raw, ok := fields["session_id"]; !ok || bytes.Equal(bytes.TrimSpace(raw), []byte("null")) {
+		return value, ValidationError{Violations: []FieldViolation{{Field: "session_id", Code: "required"}}}
+	}
+	if raw, ok := fields["version"]; !ok || bytes.Equal(bytes.TrimSpace(raw), []byte("null")) {
+		return value, ValidationError{Violations: []FieldViolation{{Field: "version", Code: "required"}}}
+	}
+	decoder := json.NewDecoder(bytes.NewReader(data))
+	decoder.DisallowUnknownFields()
+	if err := decoder.Decode(&value); err != nil {
+		return value, err
+	}
+	var trailing any
+	if err := decoder.Decode(&trailing); err != io.EOF {
+		if err == nil {
+			return value, errors.New("trailing JSON value")
+		}
+		return value, err
+	}
+	if err := value.Validate(); err != nil {
+		return value, err
+	}
+	return value, nil
+}
+
+func EncodeClientSessionAuthority(value ClientSessionAuthority) ([]byte, error) {
+	if err := value.Validate(); err != nil {
+		return nil, err
+	}
+	return json.Marshal(value)
+}
+
 func (v ClipboardPolicy) Validate() error {
 	var violations []FieldViolation
 	if v.MaxTextBytes == 0 {