authentication_sasl_final.go

package pgproto3

import (
	"encoding/binary"
	"errors"

	"github.com/jackc/pgio"
)

// AuthenticationSASLFinal is a message sent from the backend indicating a SASL authentication has completed.
type AuthenticationSASLFinal struct {
	Data []byte `json:"data" yaml:"data"`
}

// Backend identifies this message as sendable by the PostgreSQL backend.
func (*AuthenticationSASLFinal) Backend() {}

// Backend identifies this message as an authentication response.
func (*AuthenticationSASLFinal) AuthenticationResponse() {}

// Decode decodes src into dst. src must contain the complete message with the exception of the initial 1 byte message
// type identifier and 4 byte message length.
func (dst *AuthenticationSASLFinal) Decode(src []byte) error {
	//println("AuthenticationSASLFinal.Decode")
	if len(src) < 4 {
		return errors.New("authentication message too short")
	}

	authType := binary.BigEndian.Uint32(src)

	if authType != AuthTypeSASLFinal {
		return errors.New("bad auth type")
	}

	dst.Data = src[4:]

	return nil
}

// Encode encodes src into dst. dst will include the 1 byte message type identifier and the 4 byte message length.
func (src *AuthenticationSASLFinal) Encode(dst []byte) []byte {
	//println("AuthenticationSASLFinal.Encode")
	dst = append(dst, 'R')
	sp := len(dst)
	dst = pgio.AppendInt32(dst, -1)
	dst = pgio.AppendUint32(dst, AuthTypeSASLFinal)

	dst = append(dst, src.Data...)

	pgio.SetInt32(dst[sp:], int32(len(dst[sp:])))

	return dst
}

// MarshalJSON implements encoding/json.Unmarshaler.
// func (src AuthenticationSASLFinal) MarshalJSON() ([]byte, error) {
// 	return json.Marshal(struct {
// 		Type string
// 		Data string
// 	}{
// 		Type: "AuthenticationSASLFinal",
// 		Data: string(src.Data),
// 	})
// }

// // UnmarshalJSON implements encoding/json.Unmarshaler.
// func (dst *AuthenticationSASLFinal) UnmarshalJSON(data []byte) error {
// 	// Ignore null, like in the main JSON package.
// 	if string(data) == "null" {
// 		return nil
// 	}

// 	var msg struct {
// 		Data string
// 	}
// 	if err := json.Unmarshal(data, &msg); err != nil {
// 		return err
// 	}

// 	dst.Data = []byte(msg.Data)
// 	return nil
// }