77 lines
2.0 KiB
Go
77 lines
2.0 KiB
Go
package pgproto3
|
|
|
|
import (
|
|
"bytes"
|
|
"encoding/binary"
|
|
"encoding/json"
|
|
"errors"
|
|
|
|
"github.com/jackc/pgx/v5/internal/pgio"
|
|
)
|
|
|
|
// AuthenticationSASL is a message sent from the backend indicating that SASL authentication is required.
|
|
type AuthenticationSASL struct {
|
|
AuthMechanisms []string
|
|
}
|
|
|
|
// Backend identifies this message as sendable by the PostgreSQL backend.
|
|
func (*AuthenticationSASL) Backend() {}
|
|
|
|
// Backend identifies this message as an authentication response.
|
|
func (*AuthenticationSASL) 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 *AuthenticationSASL) Decode(src []byte) error {
|
|
if len(src) < 4 {
|
|
return errors.New("authentication message too short")
|
|
}
|
|
|
|
authType := binary.BigEndian.Uint32(src)
|
|
|
|
if authType != AuthTypeSASL {
|
|
return errors.New("bad auth type")
|
|
}
|
|
|
|
authMechanisms := src[4:]
|
|
for len(authMechanisms) > 1 {
|
|
idx := bytes.IndexByte(authMechanisms, 0)
|
|
if idx == -1 {
|
|
return &invalidMessageFormatErr{messageType: "AuthenticationSASL", details: "unterminated string"}
|
|
}
|
|
dst.AuthMechanisms = append(dst.AuthMechanisms, string(authMechanisms[:idx]))
|
|
authMechanisms = authMechanisms[idx+1:]
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// Encode encodes src into dst. dst will include the 1 byte message type identifier and the 4 byte message length.
|
|
func (src *AuthenticationSASL) Encode(dst []byte) []byte {
|
|
dst = append(dst, 'R')
|
|
sp := len(dst)
|
|
dst = pgio.AppendInt32(dst, -1)
|
|
dst = pgio.AppendUint32(dst, AuthTypeSASL)
|
|
|
|
for _, s := range src.AuthMechanisms {
|
|
dst = append(dst, []byte(s)...)
|
|
dst = append(dst, 0)
|
|
}
|
|
dst = append(dst, 0)
|
|
|
|
pgio.SetInt32(dst[sp:], int32(len(dst[sp:])))
|
|
|
|
return dst
|
|
}
|
|
|
|
// MarshalJSON implements encoding/json.Marshaler.
|
|
func (src AuthenticationSASL) MarshalJSON() ([]byte, error) {
|
|
return json.Marshal(struct {
|
|
Type string
|
|
AuthMechanisms []string
|
|
}{
|
|
Type: "AuthenticationSASL",
|
|
AuthMechanisms: src.AuthMechanisms,
|
|
})
|
|
}
|