github.com/jackc/pgx/v5@v5.5.5/pgproto3/authentication_gss.go (about)

     1  package pgproto3
     2  
     3  import (
     4  	"encoding/binary"
     5  	"encoding/json"
     6  	"errors"
     7  
     8  	"github.com/jackc/pgx/v5/internal/pgio"
     9  )
    10  
    11  type AuthenticationGSS struct{}
    12  
    13  func (a *AuthenticationGSS) Backend() {}
    14  
    15  func (a *AuthenticationGSS) AuthenticationResponse() {}
    16  
    17  func (a *AuthenticationGSS) Decode(src []byte) error {
    18  	if len(src) < 4 {
    19  		return errors.New("authentication message too short")
    20  	}
    21  
    22  	authType := binary.BigEndian.Uint32(src)
    23  
    24  	if authType != AuthTypeGSS {
    25  		return errors.New("bad auth type")
    26  	}
    27  	return nil
    28  }
    29  
    30  func (a *AuthenticationGSS) Encode(dst []byte) ([]byte, error) {
    31  	dst, sp := beginMessage(dst, 'R')
    32  	dst = pgio.AppendUint32(dst, AuthTypeGSS)
    33  	return finishMessage(dst, sp)
    34  }
    35  
    36  func (a *AuthenticationGSS) MarshalJSON() ([]byte, error) {
    37  	return json.Marshal(struct {
    38  		Type string
    39  		Data []byte
    40  	}{
    41  		Type: "AuthenticationGSS",
    42  	})
    43  }
    44  
    45  func (a *AuthenticationGSS) UnmarshalJSON(data []byte) error {
    46  	// Ignore null, like in the main JSON package.
    47  	if string(data) == "null" {
    48  		return nil
    49  	}
    50  
    51  	var msg struct {
    52  		Type string
    53  	}
    54  	if err := json.Unmarshal(data, &msg); err != nil {
    55  		return err
    56  	}
    57  	return nil
    58  }