mirror of
https://github.com/go-gitea/gitea
synced 2024-12-25 01:54:26 +00:00
684b7a999f
* Dump: Use mholt/archive/v3 to support tar including many compressions Signed-off-by: Philipp Homann <homann.philipp@googlemail.com> * Dump: Allow dump output to stdout Signed-off-by: Philipp Homann <homann.philipp@googlemail.com> * Dump: Fixed bug present since #6677 where SessionConfig.Provider is never "file" Signed-off-by: Philipp Homann <homann.philipp@googlemail.com> * Dump: never pack RepoRootPath, LFS.ContentPath and LogRootPath when they are below AppDataPath Signed-off-by: Philipp Homann <homann.philipp@googlemail.com> * Dump: also dump LFS (fixes #10058) Signed-off-by: Philipp Homann <homann.philipp@googlemail.com> * Dump: never dump CustomPath if CustomPath is a subdir of or equal to AppDataPath (fixes #10365) Signed-off-by: Philipp Homann <homann.philipp@googlemail.com> * Use log.Info instead of fmt.Fprintf Signed-off-by: Philipp Homann <homann.philipp@googlemail.com> * import ordering * make fmt Co-authored-by: zeripath <art27@cantab.net> Co-authored-by: techknowlogick <techknowlogick@gitea.io> Co-authored-by: Matti R <matti@mdranta.net>
168 lines
3.7 KiB
Go
Vendored
168 lines
3.7 KiB
Go
Vendored
// Copyright 2014-2017 Ulrich Kunitz. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
package lzma
|
|
|
|
import (
|
|
"errors"
|
|
"fmt"
|
|
)
|
|
|
|
// uint32LE reads an uint32 integer from a byte slice
|
|
func uint32LE(b []byte) uint32 {
|
|
x := uint32(b[3]) << 24
|
|
x |= uint32(b[2]) << 16
|
|
x |= uint32(b[1]) << 8
|
|
x |= uint32(b[0])
|
|
return x
|
|
}
|
|
|
|
// uint64LE converts the uint64 value stored as little endian to an uint64
|
|
// value.
|
|
func uint64LE(b []byte) uint64 {
|
|
x := uint64(b[7]) << 56
|
|
x |= uint64(b[6]) << 48
|
|
x |= uint64(b[5]) << 40
|
|
x |= uint64(b[4]) << 32
|
|
x |= uint64(b[3]) << 24
|
|
x |= uint64(b[2]) << 16
|
|
x |= uint64(b[1]) << 8
|
|
x |= uint64(b[0])
|
|
return x
|
|
}
|
|
|
|
// putUint32LE puts an uint32 integer into a byte slice that must have at least
|
|
// a length of 4 bytes.
|
|
func putUint32LE(b []byte, x uint32) {
|
|
b[0] = byte(x)
|
|
b[1] = byte(x >> 8)
|
|
b[2] = byte(x >> 16)
|
|
b[3] = byte(x >> 24)
|
|
}
|
|
|
|
// putUint64LE puts the uint64 value into the byte slice as little endian
|
|
// value. The byte slice b must have at least place for 8 bytes.
|
|
func putUint64LE(b []byte, x uint64) {
|
|
b[0] = byte(x)
|
|
b[1] = byte(x >> 8)
|
|
b[2] = byte(x >> 16)
|
|
b[3] = byte(x >> 24)
|
|
b[4] = byte(x >> 32)
|
|
b[5] = byte(x >> 40)
|
|
b[6] = byte(x >> 48)
|
|
b[7] = byte(x >> 56)
|
|
}
|
|
|
|
// noHeaderSize defines the value of the length field in the LZMA header.
|
|
const noHeaderSize uint64 = 1<<64 - 1
|
|
|
|
// HeaderLen provides the length of the LZMA file header.
|
|
const HeaderLen = 13
|
|
|
|
// header represents the header of an LZMA file.
|
|
type header struct {
|
|
properties Properties
|
|
dictCap int
|
|
// uncompressed size; negative value if no size is given
|
|
size int64
|
|
}
|
|
|
|
// marshalBinary marshals the header.
|
|
func (h *header) marshalBinary() (data []byte, err error) {
|
|
if err = h.properties.verify(); err != nil {
|
|
return nil, err
|
|
}
|
|
if !(0 <= h.dictCap && int64(h.dictCap) <= MaxDictCap) {
|
|
return nil, fmt.Errorf("lzma: DictCap %d out of range",
|
|
h.dictCap)
|
|
}
|
|
|
|
data = make([]byte, 13)
|
|
|
|
// property byte
|
|
data[0] = h.properties.Code()
|
|
|
|
// dictionary capacity
|
|
putUint32LE(data[1:5], uint32(h.dictCap))
|
|
|
|
// uncompressed size
|
|
var s uint64
|
|
if h.size > 0 {
|
|
s = uint64(h.size)
|
|
} else {
|
|
s = noHeaderSize
|
|
}
|
|
putUint64LE(data[5:], s)
|
|
|
|
return data, nil
|
|
}
|
|
|
|
// unmarshalBinary unmarshals the header.
|
|
func (h *header) unmarshalBinary(data []byte) error {
|
|
if len(data) != HeaderLen {
|
|
return errors.New("lzma.unmarshalBinary: data has wrong length")
|
|
}
|
|
|
|
// properties
|
|
var err error
|
|
if h.properties, err = PropertiesForCode(data[0]); err != nil {
|
|
return err
|
|
}
|
|
|
|
// dictionary capacity
|
|
h.dictCap = int(uint32LE(data[1:]))
|
|
if h.dictCap < 0 {
|
|
return errors.New(
|
|
"LZMA header: dictionary capacity exceeds maximum " +
|
|
"integer")
|
|
}
|
|
|
|
// uncompressed size
|
|
s := uint64LE(data[5:])
|
|
if s == noHeaderSize {
|
|
h.size = -1
|
|
} else {
|
|
h.size = int64(s)
|
|
if h.size < 0 {
|
|
return errors.New(
|
|
"LZMA header: uncompressed size " +
|
|
"out of int64 range")
|
|
}
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// validDictCap checks whether the dictionary capacity is correct. This
|
|
// is used to weed out wrong file headers.
|
|
func validDictCap(dictcap int) bool {
|
|
if int64(dictcap) == MaxDictCap {
|
|
return true
|
|
}
|
|
for n := uint(10); n < 32; n++ {
|
|
if dictcap == 1<<n {
|
|
return true
|
|
}
|
|
if dictcap == 1<<n+1<<(n-1) {
|
|
return true
|
|
}
|
|
}
|
|
return false
|
|
}
|
|
|
|
// ValidHeader checks for a valid LZMA file header. It allows only
|
|
// dictionary sizes of 2^n or 2^n+2^(n-1) with n >= 10 or 2^32-1. If
|
|
// there is an explicit size it must not exceed 256 GiB. The length of
|
|
// the data argument must be HeaderLen.
|
|
func ValidHeader(data []byte) bool {
|
|
var h header
|
|
if err := h.unmarshalBinary(data); err != nil {
|
|
return false
|
|
}
|
|
if !validDictCap(h.dictCap) {
|
|
return false
|
|
}
|
|
return h.size < 0 || h.size <= 1<<38
|
|
}
|