55 lines
987 B
Go
55 lines
987 B
Go
package pgproto3
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import (
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"encoding/binary"
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"github.com/jackc/pgx/pgio"
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"github.com/pkg/errors"
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)
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const (
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AuthTypeOk = 0
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AuthTypeCleartextPassword = 3
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AuthTypeMD5Password = 5
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)
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type Authentication struct {
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Type uint32
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// MD5Password fields
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Salt [4]byte
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}
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func (*Authentication) Backend() {}
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func (dst *Authentication) Decode(src []byte) error {
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*dst = Authentication{Type: binary.BigEndian.Uint32(src[:4])}
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switch dst.Type {
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case AuthTypeOk:
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case AuthTypeCleartextPassword:
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case AuthTypeMD5Password:
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copy(dst.Salt[:], src[4:8])
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default:
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return errors.Errorf("unknown authentication type: %d", dst.Type)
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}
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return nil
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}
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func (src *Authentication) Encode(dst []byte) []byte {
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dst = append(dst, 'R')
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sp := len(dst)
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dst = pgio.AppendInt32(dst, -1)
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dst = pgio.AppendUint32(dst, src.Type)
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switch src.Type {
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case AuthTypeMD5Password:
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dst = append(dst, src.Salt[:]...)
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}
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pgio.SetInt32(dst[sp:], int32(len(dst[sp:])))
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return dst
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}
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