forked from TrueCloudLab/restic
898 lines
21 KiB
Go
898 lines
21 KiB
Go
package sftp
|
|
|
|
import (
|
|
"bytes"
|
|
"encoding"
|
|
"encoding/binary"
|
|
"fmt"
|
|
"io"
|
|
"os"
|
|
"reflect"
|
|
|
|
"github.com/pkg/errors"
|
|
)
|
|
|
|
var (
|
|
errShortPacket = errors.New("packet too short")
|
|
errUnknownExtendedPacket = errors.New("unknown extended packet")
|
|
)
|
|
|
|
const (
|
|
debugDumpTxPacket = false
|
|
debugDumpRxPacket = false
|
|
debugDumpTxPacketBytes = false
|
|
debugDumpRxPacketBytes = false
|
|
)
|
|
|
|
func marshalUint32(b []byte, v uint32) []byte {
|
|
return append(b, byte(v>>24), byte(v>>16), byte(v>>8), byte(v))
|
|
}
|
|
|
|
func marshalUint64(b []byte, v uint64) []byte {
|
|
return marshalUint32(marshalUint32(b, uint32(v>>32)), uint32(v))
|
|
}
|
|
|
|
func marshalString(b []byte, v string) []byte {
|
|
return append(marshalUint32(b, uint32(len(v))), v...)
|
|
}
|
|
|
|
func marshal(b []byte, v interface{}) []byte {
|
|
if v == nil {
|
|
return b
|
|
}
|
|
switch v := v.(type) {
|
|
case uint8:
|
|
return append(b, v)
|
|
case uint32:
|
|
return marshalUint32(b, v)
|
|
case uint64:
|
|
return marshalUint64(b, v)
|
|
case string:
|
|
return marshalString(b, v)
|
|
case os.FileInfo:
|
|
return marshalFileInfo(b, v)
|
|
default:
|
|
switch d := reflect.ValueOf(v); d.Kind() {
|
|
case reflect.Struct:
|
|
for i, n := 0, d.NumField(); i < n; i++ {
|
|
b = append(marshal(b, d.Field(i).Interface()))
|
|
}
|
|
return b
|
|
case reflect.Slice:
|
|
for i, n := 0, d.Len(); i < n; i++ {
|
|
b = append(marshal(b, d.Index(i).Interface()))
|
|
}
|
|
return b
|
|
default:
|
|
panic(fmt.Sprintf("marshal(%#v): cannot handle type %T", v, v))
|
|
}
|
|
}
|
|
}
|
|
|
|
func unmarshalUint32(b []byte) (uint32, []byte) {
|
|
v := uint32(b[3]) | uint32(b[2])<<8 | uint32(b[1])<<16 | uint32(b[0])<<24
|
|
return v, b[4:]
|
|
}
|
|
|
|
func unmarshalUint32Safe(b []byte) (uint32, []byte, error) {
|
|
var v uint32
|
|
if len(b) < 4 {
|
|
return 0, nil, errShortPacket
|
|
}
|
|
v, b = unmarshalUint32(b)
|
|
return v, b, nil
|
|
}
|
|
|
|
func unmarshalUint64(b []byte) (uint64, []byte) {
|
|
h, b := unmarshalUint32(b)
|
|
l, b := unmarshalUint32(b)
|
|
return uint64(h)<<32 | uint64(l), b
|
|
}
|
|
|
|
func unmarshalUint64Safe(b []byte) (uint64, []byte, error) {
|
|
var v uint64
|
|
if len(b) < 8 {
|
|
return 0, nil, errShortPacket
|
|
}
|
|
v, b = unmarshalUint64(b)
|
|
return v, b, nil
|
|
}
|
|
|
|
func unmarshalString(b []byte) (string, []byte) {
|
|
n, b := unmarshalUint32(b)
|
|
return string(b[:n]), b[n:]
|
|
}
|
|
|
|
func unmarshalStringSafe(b []byte) (string, []byte, error) {
|
|
n, b, err := unmarshalUint32Safe(b)
|
|
if err != nil {
|
|
return "", nil, err
|
|
}
|
|
if int64(n) > int64(len(b)) {
|
|
return "", nil, errShortPacket
|
|
}
|
|
return string(b[:n]), b[n:], nil
|
|
}
|
|
|
|
// sendPacket marshals p according to RFC 4234.
|
|
func sendPacket(w io.Writer, m encoding.BinaryMarshaler) error {
|
|
bb, err := m.MarshalBinary()
|
|
if err != nil {
|
|
return errors.Errorf("binary marshaller failed: %v", err)
|
|
}
|
|
if debugDumpTxPacketBytes {
|
|
debug("send packet: %s %d bytes %x", fxp(bb[0]), len(bb), bb[1:])
|
|
} else if debugDumpTxPacket {
|
|
debug("send packet: %s %d bytes", fxp(bb[0]), len(bb))
|
|
}
|
|
l := uint32(len(bb))
|
|
hdr := []byte{byte(l >> 24), byte(l >> 16), byte(l >> 8), byte(l)}
|
|
_, err = w.Write(hdr)
|
|
if err != nil {
|
|
return errors.Errorf("failed to send packet header: %v", err)
|
|
}
|
|
_, err = w.Write(bb)
|
|
if err != nil {
|
|
return errors.Errorf("failed to send packet body: %v", err)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func recvPacket(r io.Reader) (uint8, []byte, error) {
|
|
var b = []byte{0, 0, 0, 0}
|
|
if _, err := io.ReadFull(r, b); err != nil {
|
|
return 0, nil, err
|
|
}
|
|
l, _ := unmarshalUint32(b)
|
|
b = make([]byte, l)
|
|
if _, err := io.ReadFull(r, b); err != nil {
|
|
debug("recv packet %d bytes: err %v", l, err)
|
|
return 0, nil, err
|
|
}
|
|
if debugDumpRxPacketBytes {
|
|
debug("recv packet: %s %d bytes %x", fxp(b[0]), l, b[1:])
|
|
} else if debugDumpRxPacket {
|
|
debug("recv packet: %s %d bytes", fxp(b[0]), l)
|
|
}
|
|
return b[0], b[1:], nil
|
|
}
|
|
|
|
type extensionPair struct {
|
|
Name string
|
|
Data string
|
|
}
|
|
|
|
func unmarshalExtensionPair(b []byte) (extensionPair, []byte, error) {
|
|
var ep extensionPair
|
|
var err error
|
|
ep.Name, b, err = unmarshalStringSafe(b)
|
|
if err != nil {
|
|
return ep, b, err
|
|
}
|
|
ep.Data, b, err = unmarshalStringSafe(b)
|
|
return ep, b, err
|
|
}
|
|
|
|
// Here starts the definition of packets along with their MarshalBinary
|
|
// implementations.
|
|
// Manually writing the marshalling logic wins us a lot of time and
|
|
// allocation.
|
|
|
|
type sshFxInitPacket struct {
|
|
Version uint32
|
|
Extensions []extensionPair
|
|
}
|
|
|
|
func (p sshFxInitPacket) MarshalBinary() ([]byte, error) {
|
|
l := 1 + 4 // byte + uint32
|
|
for _, e := range p.Extensions {
|
|
l += 4 + len(e.Name) + 4 + len(e.Data)
|
|
}
|
|
|
|
b := make([]byte, 0, l)
|
|
b = append(b, ssh_FXP_INIT)
|
|
b = marshalUint32(b, p.Version)
|
|
for _, e := range p.Extensions {
|
|
b = marshalString(b, e.Name)
|
|
b = marshalString(b, e.Data)
|
|
}
|
|
return b, nil
|
|
}
|
|
|
|
func (p *sshFxInitPacket) UnmarshalBinary(b []byte) error {
|
|
var err error
|
|
if p.Version, b, err = unmarshalUint32Safe(b); err != nil {
|
|
return err
|
|
}
|
|
for len(b) > 0 {
|
|
var ep extensionPair
|
|
ep, b, err = unmarshalExtensionPair(b)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
p.Extensions = append(p.Extensions, ep)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
type sshFxVersionPacket struct {
|
|
Version uint32
|
|
Extensions []struct {
|
|
Name, Data string
|
|
}
|
|
}
|
|
|
|
func (p sshFxVersionPacket) MarshalBinary() ([]byte, error) {
|
|
l := 1 + 4 // byte + uint32
|
|
for _, e := range p.Extensions {
|
|
l += 4 + len(e.Name) + 4 + len(e.Data)
|
|
}
|
|
|
|
b := make([]byte, 0, l)
|
|
b = append(b, ssh_FXP_VERSION)
|
|
b = marshalUint32(b, p.Version)
|
|
for _, e := range p.Extensions {
|
|
b = marshalString(b, e.Name)
|
|
b = marshalString(b, e.Data)
|
|
}
|
|
return b, nil
|
|
}
|
|
|
|
func marshalIDString(packetType byte, id uint32, str string) ([]byte, error) {
|
|
l := 1 + 4 + // type(byte) + uint32
|
|
4 + len(str)
|
|
|
|
b := make([]byte, 0, l)
|
|
b = append(b, packetType)
|
|
b = marshalUint32(b, id)
|
|
b = marshalString(b, str)
|
|
return b, nil
|
|
}
|
|
|
|
func unmarshalIDString(b []byte, id *uint32, str *string) error {
|
|
var err error
|
|
*id, b, err = unmarshalUint32Safe(b)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
*str, b, err = unmarshalStringSafe(b)
|
|
return err
|
|
}
|
|
|
|
type sshFxpReaddirPacket struct {
|
|
ID uint32
|
|
Handle string
|
|
}
|
|
|
|
func (p sshFxpReaddirPacket) id() uint32 { return p.ID }
|
|
|
|
func (p sshFxpReaddirPacket) MarshalBinary() ([]byte, error) {
|
|
return marshalIDString(ssh_FXP_READDIR, p.ID, p.Handle)
|
|
}
|
|
|
|
func (p *sshFxpReaddirPacket) UnmarshalBinary(b []byte) error {
|
|
return unmarshalIDString(b, &p.ID, &p.Handle)
|
|
}
|
|
|
|
type sshFxpOpendirPacket struct {
|
|
ID uint32
|
|
Path string
|
|
}
|
|
|
|
func (p sshFxpOpendirPacket) id() uint32 { return p.ID }
|
|
|
|
func (p sshFxpOpendirPacket) MarshalBinary() ([]byte, error) {
|
|
return marshalIDString(ssh_FXP_OPENDIR, p.ID, p.Path)
|
|
}
|
|
|
|
func (p *sshFxpOpendirPacket) UnmarshalBinary(b []byte) error {
|
|
return unmarshalIDString(b, &p.ID, &p.Path)
|
|
}
|
|
|
|
type sshFxpLstatPacket struct {
|
|
ID uint32
|
|
Path string
|
|
}
|
|
|
|
func (p sshFxpLstatPacket) id() uint32 { return p.ID }
|
|
|
|
func (p sshFxpLstatPacket) MarshalBinary() ([]byte, error) {
|
|
return marshalIDString(ssh_FXP_LSTAT, p.ID, p.Path)
|
|
}
|
|
|
|
func (p *sshFxpLstatPacket) UnmarshalBinary(b []byte) error {
|
|
return unmarshalIDString(b, &p.ID, &p.Path)
|
|
}
|
|
|
|
type sshFxpStatPacket struct {
|
|
ID uint32
|
|
Path string
|
|
}
|
|
|
|
func (p sshFxpStatPacket) id() uint32 { return p.ID }
|
|
|
|
func (p sshFxpStatPacket) MarshalBinary() ([]byte, error) {
|
|
return marshalIDString(ssh_FXP_STAT, p.ID, p.Path)
|
|
}
|
|
|
|
func (p *sshFxpStatPacket) UnmarshalBinary(b []byte) error {
|
|
return unmarshalIDString(b, &p.ID, &p.Path)
|
|
}
|
|
|
|
type sshFxpFstatPacket struct {
|
|
ID uint32
|
|
Handle string
|
|
}
|
|
|
|
func (p sshFxpFstatPacket) id() uint32 { return p.ID }
|
|
|
|
func (p sshFxpFstatPacket) MarshalBinary() ([]byte, error) {
|
|
return marshalIDString(ssh_FXP_FSTAT, p.ID, p.Handle)
|
|
}
|
|
|
|
func (p *sshFxpFstatPacket) UnmarshalBinary(b []byte) error {
|
|
return unmarshalIDString(b, &p.ID, &p.Handle)
|
|
}
|
|
|
|
type sshFxpClosePacket struct {
|
|
ID uint32
|
|
Handle string
|
|
}
|
|
|
|
func (p sshFxpClosePacket) id() uint32 { return p.ID }
|
|
|
|
func (p sshFxpClosePacket) MarshalBinary() ([]byte, error) {
|
|
return marshalIDString(ssh_FXP_CLOSE, p.ID, p.Handle)
|
|
}
|
|
|
|
func (p *sshFxpClosePacket) UnmarshalBinary(b []byte) error {
|
|
return unmarshalIDString(b, &p.ID, &p.Handle)
|
|
}
|
|
|
|
type sshFxpRemovePacket struct {
|
|
ID uint32
|
|
Filename string
|
|
}
|
|
|
|
func (p sshFxpRemovePacket) id() uint32 { return p.ID }
|
|
|
|
func (p sshFxpRemovePacket) MarshalBinary() ([]byte, error) {
|
|
return marshalIDString(ssh_FXP_REMOVE, p.ID, p.Filename)
|
|
}
|
|
|
|
func (p *sshFxpRemovePacket) UnmarshalBinary(b []byte) error {
|
|
return unmarshalIDString(b, &p.ID, &p.Filename)
|
|
}
|
|
|
|
type sshFxpRmdirPacket struct {
|
|
ID uint32
|
|
Path string
|
|
}
|
|
|
|
func (p sshFxpRmdirPacket) id() uint32 { return p.ID }
|
|
|
|
func (p sshFxpRmdirPacket) MarshalBinary() ([]byte, error) {
|
|
return marshalIDString(ssh_FXP_RMDIR, p.ID, p.Path)
|
|
}
|
|
|
|
func (p *sshFxpRmdirPacket) UnmarshalBinary(b []byte) error {
|
|
return unmarshalIDString(b, &p.ID, &p.Path)
|
|
}
|
|
|
|
type sshFxpSymlinkPacket struct {
|
|
ID uint32
|
|
Targetpath string
|
|
Linkpath string
|
|
}
|
|
|
|
func (p sshFxpSymlinkPacket) id() uint32 { return p.ID }
|
|
|
|
func (p sshFxpSymlinkPacket) MarshalBinary() ([]byte, error) {
|
|
l := 1 + 4 + // type(byte) + uint32
|
|
4 + len(p.Targetpath) +
|
|
4 + len(p.Linkpath)
|
|
|
|
b := make([]byte, 0, l)
|
|
b = append(b, ssh_FXP_SYMLINK)
|
|
b = marshalUint32(b, p.ID)
|
|
b = marshalString(b, p.Targetpath)
|
|
b = marshalString(b, p.Linkpath)
|
|
return b, nil
|
|
}
|
|
|
|
func (p *sshFxpSymlinkPacket) UnmarshalBinary(b []byte) error {
|
|
var err error
|
|
if p.ID, b, err = unmarshalUint32Safe(b); err != nil {
|
|
return err
|
|
} else if p.Targetpath, b, err = unmarshalStringSafe(b); err != nil {
|
|
return err
|
|
} else if p.Linkpath, b, err = unmarshalStringSafe(b); err != nil {
|
|
return err
|
|
}
|
|
return nil
|
|
}
|
|
|
|
type sshFxpReadlinkPacket struct {
|
|
ID uint32
|
|
Path string
|
|
}
|
|
|
|
func (p sshFxpReadlinkPacket) id() uint32 { return p.ID }
|
|
|
|
func (p sshFxpReadlinkPacket) MarshalBinary() ([]byte, error) {
|
|
return marshalIDString(ssh_FXP_READLINK, p.ID, p.Path)
|
|
}
|
|
|
|
func (p *sshFxpReadlinkPacket) UnmarshalBinary(b []byte) error {
|
|
return unmarshalIDString(b, &p.ID, &p.Path)
|
|
}
|
|
|
|
type sshFxpRealpathPacket struct {
|
|
ID uint32
|
|
Path string
|
|
}
|
|
|
|
func (p sshFxpRealpathPacket) id() uint32 { return p.ID }
|
|
|
|
func (p sshFxpRealpathPacket) MarshalBinary() ([]byte, error) {
|
|
return marshalIDString(ssh_FXP_REALPATH, p.ID, p.Path)
|
|
}
|
|
|
|
func (p *sshFxpRealpathPacket) UnmarshalBinary(b []byte) error {
|
|
return unmarshalIDString(b, &p.ID, &p.Path)
|
|
}
|
|
|
|
type sshFxpNameAttr struct {
|
|
Name string
|
|
LongName string
|
|
Attrs []interface{}
|
|
}
|
|
|
|
func (p sshFxpNameAttr) MarshalBinary() ([]byte, error) {
|
|
b := []byte{}
|
|
b = marshalString(b, p.Name)
|
|
b = marshalString(b, p.LongName)
|
|
for _, attr := range p.Attrs {
|
|
b = marshal(b, attr)
|
|
}
|
|
return b, nil
|
|
}
|
|
|
|
type sshFxpNamePacket struct {
|
|
ID uint32
|
|
NameAttrs []sshFxpNameAttr
|
|
}
|
|
|
|
func (p sshFxpNamePacket) MarshalBinary() ([]byte, error) {
|
|
b := []byte{}
|
|
b = append(b, ssh_FXP_NAME)
|
|
b = marshalUint32(b, p.ID)
|
|
b = marshalUint32(b, uint32(len(p.NameAttrs)))
|
|
for _, na := range p.NameAttrs {
|
|
ab, err := na.MarshalBinary()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
b = append(b, ab...)
|
|
}
|
|
return b, nil
|
|
}
|
|
|
|
type sshFxpOpenPacket struct {
|
|
ID uint32
|
|
Path string
|
|
Pflags uint32
|
|
Flags uint32 // ignored
|
|
}
|
|
|
|
func (p sshFxpOpenPacket) id() uint32 { return p.ID }
|
|
|
|
func (p sshFxpOpenPacket) MarshalBinary() ([]byte, error) {
|
|
l := 1 + 4 +
|
|
4 + len(p.Path) +
|
|
4 + 4
|
|
|
|
b := make([]byte, 0, l)
|
|
b = append(b, ssh_FXP_OPEN)
|
|
b = marshalUint32(b, p.ID)
|
|
b = marshalString(b, p.Path)
|
|
b = marshalUint32(b, p.Pflags)
|
|
b = marshalUint32(b, p.Flags)
|
|
return b, nil
|
|
}
|
|
|
|
func (p *sshFxpOpenPacket) UnmarshalBinary(b []byte) error {
|
|
var err error
|
|
if p.ID, b, err = unmarshalUint32Safe(b); err != nil {
|
|
return err
|
|
} else if p.Path, b, err = unmarshalStringSafe(b); err != nil {
|
|
return err
|
|
} else if p.Pflags, b, err = unmarshalUint32Safe(b); err != nil {
|
|
return err
|
|
} else if p.Flags, b, err = unmarshalUint32Safe(b); err != nil {
|
|
return err
|
|
}
|
|
return nil
|
|
}
|
|
|
|
type sshFxpReadPacket struct {
|
|
ID uint32
|
|
Handle string
|
|
Offset uint64
|
|
Len uint32
|
|
}
|
|
|
|
func (p sshFxpReadPacket) id() uint32 { return p.ID }
|
|
|
|
func (p sshFxpReadPacket) MarshalBinary() ([]byte, error) {
|
|
l := 1 + 4 + // type(byte) + uint32
|
|
4 + len(p.Handle) +
|
|
8 + 4 // uint64 + uint32
|
|
|
|
b := make([]byte, 0, l)
|
|
b = append(b, ssh_FXP_READ)
|
|
b = marshalUint32(b, p.ID)
|
|
b = marshalString(b, p.Handle)
|
|
b = marshalUint64(b, p.Offset)
|
|
b = marshalUint32(b, p.Len)
|
|
return b, nil
|
|
}
|
|
|
|
func (p *sshFxpReadPacket) UnmarshalBinary(b []byte) error {
|
|
var err error
|
|
if p.ID, b, err = unmarshalUint32Safe(b); err != nil {
|
|
return err
|
|
} else if p.Handle, b, err = unmarshalStringSafe(b); err != nil {
|
|
return err
|
|
} else if p.Offset, b, err = unmarshalUint64Safe(b); err != nil {
|
|
return err
|
|
} else if p.Len, b, err = unmarshalUint32Safe(b); err != nil {
|
|
return err
|
|
}
|
|
return nil
|
|
}
|
|
|
|
type sshFxpRenamePacket struct {
|
|
ID uint32
|
|
Oldpath string
|
|
Newpath string
|
|
}
|
|
|
|
func (p sshFxpRenamePacket) id() uint32 { return p.ID }
|
|
|
|
func (p sshFxpRenamePacket) MarshalBinary() ([]byte, error) {
|
|
l := 1 + 4 + // type(byte) + uint32
|
|
4 + len(p.Oldpath) +
|
|
4 + len(p.Newpath)
|
|
|
|
b := make([]byte, 0, l)
|
|
b = append(b, ssh_FXP_RENAME)
|
|
b = marshalUint32(b, p.ID)
|
|
b = marshalString(b, p.Oldpath)
|
|
b = marshalString(b, p.Newpath)
|
|
return b, nil
|
|
}
|
|
|
|
func (p *sshFxpRenamePacket) UnmarshalBinary(b []byte) error {
|
|
var err error
|
|
if p.ID, b, err = unmarshalUint32Safe(b); err != nil {
|
|
return err
|
|
} else if p.Oldpath, b, err = unmarshalStringSafe(b); err != nil {
|
|
return err
|
|
} else if p.Newpath, b, err = unmarshalStringSafe(b); err != nil {
|
|
return err
|
|
}
|
|
return nil
|
|
}
|
|
|
|
type sshFxpWritePacket struct {
|
|
ID uint32
|
|
Handle string
|
|
Offset uint64
|
|
Length uint32
|
|
Data []byte
|
|
}
|
|
|
|
func (p sshFxpWritePacket) id() uint32 { return p.ID }
|
|
|
|
func (p sshFxpWritePacket) MarshalBinary() ([]byte, error) {
|
|
l := 1 + 4 + // type(byte) + uint32
|
|
4 + len(p.Handle) +
|
|
8 + 4 + // uint64 + uint32
|
|
len(p.Data)
|
|
|
|
b := make([]byte, 0, l)
|
|
b = append(b, ssh_FXP_WRITE)
|
|
b = marshalUint32(b, p.ID)
|
|
b = marshalString(b, p.Handle)
|
|
b = marshalUint64(b, p.Offset)
|
|
b = marshalUint32(b, p.Length)
|
|
b = append(b, p.Data...)
|
|
return b, nil
|
|
}
|
|
|
|
func (p *sshFxpWritePacket) UnmarshalBinary(b []byte) error {
|
|
var err error
|
|
if p.ID, b, err = unmarshalUint32Safe(b); err != nil {
|
|
return err
|
|
} else if p.Handle, b, err = unmarshalStringSafe(b); err != nil {
|
|
return err
|
|
} else if p.Offset, b, err = unmarshalUint64Safe(b); err != nil {
|
|
return err
|
|
} else if p.Length, b, err = unmarshalUint32Safe(b); err != nil {
|
|
return err
|
|
} else if uint32(len(b)) < p.Length {
|
|
return errShortPacket
|
|
}
|
|
|
|
p.Data = append([]byte{}, b[:p.Length]...)
|
|
return nil
|
|
}
|
|
|
|
type sshFxpMkdirPacket struct {
|
|
ID uint32
|
|
Path string
|
|
Flags uint32 // ignored
|
|
}
|
|
|
|
func (p sshFxpMkdirPacket) id() uint32 { return p.ID }
|
|
|
|
func (p sshFxpMkdirPacket) MarshalBinary() ([]byte, error) {
|
|
l := 1 + 4 + // type(byte) + uint32
|
|
4 + len(p.Path) +
|
|
4 // uint32
|
|
|
|
b := make([]byte, 0, l)
|
|
b = append(b, ssh_FXP_MKDIR)
|
|
b = marshalUint32(b, p.ID)
|
|
b = marshalString(b, p.Path)
|
|
b = marshalUint32(b, p.Flags)
|
|
return b, nil
|
|
}
|
|
|
|
func (p *sshFxpMkdirPacket) UnmarshalBinary(b []byte) error {
|
|
var err error
|
|
if p.ID, b, err = unmarshalUint32Safe(b); err != nil {
|
|
return err
|
|
} else if p.Path, b, err = unmarshalStringSafe(b); err != nil {
|
|
return err
|
|
} else if p.Flags, b, err = unmarshalUint32Safe(b); err != nil {
|
|
return err
|
|
}
|
|
return nil
|
|
}
|
|
|
|
type sshFxpSetstatPacket struct {
|
|
ID uint32
|
|
Path string
|
|
Flags uint32
|
|
Attrs interface{}
|
|
}
|
|
|
|
type sshFxpFsetstatPacket struct {
|
|
ID uint32
|
|
Handle string
|
|
Flags uint32
|
|
Attrs interface{}
|
|
}
|
|
|
|
func (p sshFxpSetstatPacket) id() uint32 { return p.ID }
|
|
func (p sshFxpFsetstatPacket) id() uint32 { return p.ID }
|
|
|
|
func (p sshFxpSetstatPacket) MarshalBinary() ([]byte, error) {
|
|
l := 1 + 4 + // type(byte) + uint32
|
|
4 + len(p.Path) +
|
|
4 // uint32 + uint64
|
|
|
|
b := make([]byte, 0, l)
|
|
b = append(b, ssh_FXP_SETSTAT)
|
|
b = marshalUint32(b, p.ID)
|
|
b = marshalString(b, p.Path)
|
|
b = marshalUint32(b, p.Flags)
|
|
b = marshal(b, p.Attrs)
|
|
return b, nil
|
|
}
|
|
|
|
func (p sshFxpFsetstatPacket) MarshalBinary() ([]byte, error) {
|
|
l := 1 + 4 + // type(byte) + uint32
|
|
4 + len(p.Handle) +
|
|
4 // uint32 + uint64
|
|
|
|
b := make([]byte, 0, l)
|
|
b = append(b, ssh_FXP_FSETSTAT)
|
|
b = marshalUint32(b, p.ID)
|
|
b = marshalString(b, p.Handle)
|
|
b = marshalUint32(b, p.Flags)
|
|
b = marshal(b, p.Attrs)
|
|
return b, nil
|
|
}
|
|
|
|
func (p *sshFxpSetstatPacket) UnmarshalBinary(b []byte) error {
|
|
var err error
|
|
if p.ID, b, err = unmarshalUint32Safe(b); err != nil {
|
|
return err
|
|
} else if p.Path, b, err = unmarshalStringSafe(b); err != nil {
|
|
return err
|
|
} else if p.Flags, b, err = unmarshalUint32Safe(b); err != nil {
|
|
return err
|
|
}
|
|
p.Attrs = b
|
|
return nil
|
|
}
|
|
|
|
func (p *sshFxpFsetstatPacket) UnmarshalBinary(b []byte) error {
|
|
var err error
|
|
if p.ID, b, err = unmarshalUint32Safe(b); err != nil {
|
|
return err
|
|
} else if p.Handle, b, err = unmarshalStringSafe(b); err != nil {
|
|
return err
|
|
} else if p.Flags, b, err = unmarshalUint32Safe(b); err != nil {
|
|
return err
|
|
}
|
|
p.Attrs = b
|
|
return nil
|
|
}
|
|
|
|
type sshFxpHandlePacket struct {
|
|
ID uint32
|
|
Handle string
|
|
}
|
|
|
|
func (p sshFxpHandlePacket) MarshalBinary() ([]byte, error) {
|
|
b := []byte{ssh_FXP_HANDLE}
|
|
b = marshalUint32(b, p.ID)
|
|
b = marshalString(b, p.Handle)
|
|
return b, nil
|
|
}
|
|
|
|
type sshFxpStatusPacket struct {
|
|
ID uint32
|
|
StatusError
|
|
}
|
|
|
|
func (p sshFxpStatusPacket) MarshalBinary() ([]byte, error) {
|
|
b := []byte{ssh_FXP_STATUS}
|
|
b = marshalUint32(b, p.ID)
|
|
b = marshalStatus(b, p.StatusError)
|
|
return b, nil
|
|
}
|
|
|
|
type sshFxpDataPacket struct {
|
|
ID uint32
|
|
Length uint32
|
|
Data []byte
|
|
}
|
|
|
|
func (p sshFxpDataPacket) MarshalBinary() ([]byte, error) {
|
|
b := []byte{ssh_FXP_DATA}
|
|
b = marshalUint32(b, p.ID)
|
|
b = marshalUint32(b, p.Length)
|
|
b = append(b, p.Data[:p.Length]...)
|
|
return b, nil
|
|
}
|
|
|
|
func (p *sshFxpDataPacket) UnmarshalBinary(b []byte) error {
|
|
var err error
|
|
if p.ID, b, err = unmarshalUint32Safe(b); err != nil {
|
|
return err
|
|
} else if p.Length, b, err = unmarshalUint32Safe(b); err != nil {
|
|
return err
|
|
} else if uint32(len(b)) < p.Length {
|
|
return errors.New("truncated packet")
|
|
}
|
|
|
|
p.Data = make([]byte, p.Length)
|
|
copy(p.Data, b)
|
|
return nil
|
|
}
|
|
|
|
type sshFxpStatvfsPacket struct {
|
|
ID uint32
|
|
Path string
|
|
}
|
|
|
|
func (p sshFxpStatvfsPacket) id() uint32 { return p.ID }
|
|
|
|
func (p sshFxpStatvfsPacket) MarshalBinary() ([]byte, error) {
|
|
l := 1 + 4 + // type(byte) + uint32
|
|
len(p.Path) +
|
|
len("statvfs@openssh.com")
|
|
|
|
b := make([]byte, 0, l)
|
|
b = append(b, ssh_FXP_EXTENDED)
|
|
b = marshalUint32(b, p.ID)
|
|
b = marshalString(b, "statvfs@openssh.com")
|
|
b = marshalString(b, p.Path)
|
|
return b, nil
|
|
}
|
|
|
|
// A StatVFS contains statistics about a filesystem.
|
|
type StatVFS struct {
|
|
ID uint32
|
|
Bsize uint64 /* file system block size */
|
|
Frsize uint64 /* fundamental fs block size */
|
|
Blocks uint64 /* number of blocks (unit f_frsize) */
|
|
Bfree uint64 /* free blocks in file system */
|
|
Bavail uint64 /* free blocks for non-root */
|
|
Files uint64 /* total file inodes */
|
|
Ffree uint64 /* free file inodes */
|
|
Favail uint64 /* free file inodes for to non-root */
|
|
Fsid uint64 /* file system id */
|
|
Flag uint64 /* bit mask of f_flag values */
|
|
Namemax uint64 /* maximum filename length */
|
|
}
|
|
|
|
// TotalSpace calculates the amount of total space in a filesystem.
|
|
func (p *StatVFS) TotalSpace() uint64 {
|
|
return p.Frsize * p.Blocks
|
|
}
|
|
|
|
// FreeSpace calculates the amount of free space in a filesystem.
|
|
func (p *StatVFS) FreeSpace() uint64 {
|
|
return p.Frsize * p.Bfree
|
|
}
|
|
|
|
// Convert to ssh_FXP_EXTENDED_REPLY packet binary format
|
|
func (p *StatVFS) MarshalBinary() ([]byte, error) {
|
|
var buf bytes.Buffer
|
|
buf.Write([]byte{ssh_FXP_EXTENDED_REPLY})
|
|
err := binary.Write(&buf, binary.BigEndian, p)
|
|
return buf.Bytes(), err
|
|
}
|
|
|
|
type sshFxpExtendedPacket struct {
|
|
ID uint32
|
|
ExtendedRequest string
|
|
SpecificPacket interface {
|
|
serverRespondablePacket
|
|
readonly() bool
|
|
}
|
|
}
|
|
|
|
func (p sshFxpExtendedPacket) id() uint32 { return p.ID }
|
|
func (p sshFxpExtendedPacket) readonly() bool { return p.SpecificPacket.readonly() }
|
|
|
|
func (p sshFxpExtendedPacket) respond(svr *Server) error {
|
|
return p.SpecificPacket.respond(svr)
|
|
}
|
|
|
|
func (p *sshFxpExtendedPacket) UnmarshalBinary(b []byte) error {
|
|
var err error
|
|
bOrig := b
|
|
if p.ID, b, err = unmarshalUint32Safe(b); err != nil {
|
|
return err
|
|
} else if p.ExtendedRequest, b, err = unmarshalStringSafe(b); err != nil {
|
|
return err
|
|
}
|
|
|
|
// specific unmarshalling
|
|
switch p.ExtendedRequest {
|
|
case "statvfs@openssh.com":
|
|
p.SpecificPacket = &sshFxpExtendedPacketStatVFS{}
|
|
default:
|
|
return errUnknownExtendedPacket
|
|
}
|
|
|
|
return p.SpecificPacket.UnmarshalBinary(bOrig)
|
|
}
|
|
|
|
type sshFxpExtendedPacketStatVFS struct {
|
|
ID uint32
|
|
ExtendedRequest string
|
|
Path string
|
|
}
|
|
|
|
func (p sshFxpExtendedPacketStatVFS) id() uint32 { return p.ID }
|
|
func (p sshFxpExtendedPacketStatVFS) readonly() bool { return true }
|
|
func (p *sshFxpExtendedPacketStatVFS) UnmarshalBinary(b []byte) error {
|
|
var err error
|
|
if p.ID, b, err = unmarshalUint32Safe(b); err != nil {
|
|
return err
|
|
} else if p.ExtendedRequest, b, err = unmarshalStringSafe(b); err != nil {
|
|
return err
|
|
} else if p.Path, b, err = unmarshalStringSafe(b); err != nil {
|
|
return err
|
|
}
|
|
return nil
|
|
}
|