package pgproto3 import ( "encoding/binary" "encoding/json" "errors" "github.com/jackc/pgx/v5/internal/pgio" ) type AuthenticationGSS struct{} func (a *AuthenticationGSS) Backend() {} func (a *AuthenticationGSS) AuthenticationResponse() {} func (a *AuthenticationGSS) Decode(src []byte) error { if len(src) < 4 { return errors.New("authentication message too short") } authType := binary.BigEndian.Uint32(src) if authType != AuthTypeGSS { return errors.New("bad auth type") } return nil } func (a *AuthenticationGSS) Encode(dst []byte) []byte { dst = append(dst, 'R') dst = pgio.AppendInt32(dst, 4) dst = pgio.AppendUint32(dst, AuthTypeGSS) return dst } func (a *AuthenticationGSS) MarshalJSON() ([]byte, error) { return json.Marshal(struct { Type string Data []byte }{ Type: "AuthenticationGSS", }) } func (a *AuthenticationGSS) UnmarshalJSON(data []byte) error { // Ignore null, like in the main JSON package. if string(data) == "null" { return nil } var msg struct { Type string } if err := json.Unmarshal(data, &msg); err != nil { return err } return nil }