mirror of
https://github.com/jackc/pgx.git
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eff55451cf
Altered chunkreader to never reuse memory. Altered pgproto3 to to copy memory when decoding. Renamed UnmarshalBinary to Decode because of changed semantics.
55 lines
1003 B
Go
55 lines
1003 B
Go
package pgproto3
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import (
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"bytes"
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"encoding/binary"
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"fmt"
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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 fmt.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) MarshalBinary() ([]byte, error) {
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var bigEndian BigEndianBuf
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buf := &bytes.Buffer{}
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buf.WriteByte('R')
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buf.Write(bigEndian.Uint32(0))
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buf.Write(bigEndian.Uint32(src.Type))
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switch src.Type {
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case AuthTypeMD5Password:
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buf.Write(src.Salt[:])
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}
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binary.BigEndian.PutUint32(buf.Bytes()[1:5], uint32(buf.Len()-1))
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return buf.Bytes(), nil
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}
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