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package pgproto3
import (
"encoding/binary"
"encoding/json"
"errors"
"github.com/jackc/pgx/v5/internal/pgio"
)
// AuthenticationSASLContinue is a message sent from the backend containing a SASL challenge.
type AuthenticationSASLContinue struct {
Data []byte
}
// Backend identifies this message as sendable by the PostgreSQL backend.
func (*AuthenticationSASLContinue) Backend() {}
// Backend identifies this message as an authentication response.
func (*AuthenticationSASLContinue) 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 *AuthenticationSASLContinue) Decode(src []byte) error {
if len(src) < 4 {
return errors.New("authentication message too short")
}
authType := binary.BigEndian.Uint32(src)
if authType != AuthTypeSASLContinue {
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 *AuthenticationSASLContinue) Encode(dst []byte) ([]byte, error) {
dst, sp := beginMessage(dst, 'R')
dst = pgio.AppendUint32(dst, AuthTypeSASLContinue)
dst = append(dst, src.Data...)
return finishMessage(dst, sp)
}
// MarshalJSON implements encoding/json.Marshaler.
func (src AuthenticationSASLContinue) MarshalJSON() ([]byte, error) {
return json.Marshal(struct {
Type string
Data string
}{
Type: "AuthenticationSASLContinue",
Data: string(src.Data),
})
}
// UnmarshalJSON implements encoding/json.Unmarshaler.
func (dst *AuthenticationSASLContinue) 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
}
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