golang 获取exe、dll、apk 版本号

//golang实现读取exedllapk版本号
packagemain

import(
"flag"
"fmt"
"log"
"os"
"path/filepath"
)

import(
"github.com/lunny/axmlParser"
)

var(
filefileInfo
)

const(
MZ="MZ"
PE="PE"
RSRC=".rsrc"
TYPET=16
PEOFFSET=64
MACHINE=332
DEFAULT=`C:WindowsSystem32cmd.exe`
)

typefileInfostruct{
FilePathstring
Versionstring
Debugbool
}

func(f*fileInfo)checkError(errerror){
iferr!=nil{
log.Fatalln(err)
}
}

//获取exedll版本
func(f*fileInfo)GetExeVersion()(errerror){
file,err:=os.Open(f.FilePath)
f.checkError(err)

//第一次读取64byte
buffer:=make([]byte,64)
_,err=file.Read(buffer)
f.checkError(err)
deferfile.Close()

str:=string(buffer[0])+string(buffer[1])
ifstr!=MZ{
log.Fatalln("读取exe错误,找不到MZ.",f.FilePath)
}

peOffset:=f.unpack([]byte{buffer[60],buffer[61],buffer[62],buffer[63]})
ifpeOffset<PEOFFSET{
log.Fatalln("peOffset读取错误.",f.FilePath)
}

//读取从文件开头移位到peOffset，第二次读取24byte
_,err=file.Seek(int64(peOffset),0)
buffer=make([]byte,24)
_,err=file.Read(buffer)
f.checkError(err)

str=string(buffer[0])+string(buffer[1])
ifstr!=PE{
log.Fatalln("读取exe错误,找不到PE.",f.FilePath)
}

machine:=f.unpack([]byte{buffer[4],buffer[5]})
ifmachine!=MACHINE{
log.Fatalln("machine读取错误.",f.FilePath)
}

noSections:=f.unpack([]byte{buffer[6],buffer[7]})
optHdrSize:=f.unpack([]byte{buffer[20],buffer[21]})

//读取从当前位置移位到optHdrSize，第三次读取40byte
file.Seek(int64(optHdrSize),1)
resFound:=false
fori:=0;i<int(noSections);i++{
buffer=make([]byte,40)
file.Read(buffer)
str=string(buffer[0])+string(buffer[1])+string(buffer[2])+string(buffer[3])+string(buffer[4])
ifstr==RSRC{
resFound=true
break
}
}
if!resFound{
log.Fatalln("读取exe错误,找不到.rsrc.",f.FilePath)
}

infoVirt:=f.unpack([]byte{buffer[12],buffer[13],buffer[14],buffer[15]})
infoSize:=f.unpack([]byte{buffer[16],buffer[17],buffer[18],buffer[19]})
infoOff:=f.unpack([]byte{buffer[20],buffer[21],buffer[22],buffer[23]})

//读取从文件开头位置移位到infoOff，第四次读取infoSizebyte
file.Seek(int64(infoOff),infoSize)
_,err=file.Read(buffer)
f.checkError(err)

nameEntries:=f.unpack([]byte{buffer[12],buffer[13]})
idEntries:=f.unpack([]byte{buffer[14],buffer[15]})

varinfoFoundbool
varsubOff,iint64
fori=0;i<(nameEntries+idEntries);i++{
typeT:=f.unpack([]byte{buffer[i*8+16],buffer[i*8+17],buffer[i*8+18],buffer[i*8+19]})
iftypeT==TYPET{
infoFound=true
subOff=int64(f.unpack([]byte{buffer[i*8+20],buffer[i*8+21],buffer[i*8+22],buffer[i*8+23]}))
break
}
}
if!infoFound{
log.Fatalln("读取exe错误,找不到typeT==16.",f.FilePath)
}

subOff=subOff&0x7fffffff
infoOff=f.unpack([]byte{buffer[subOff+20],buffer[subOff+21],buffer[subOff+22],buffer[subOff+23]})//offsetoffirstFILEINFO
infoOff=infoOff&0x7fffffff
infoOff=f.unpack([]byte{buffer[infoOff+20],buffer[infoOff+21],buffer[infoOff+22],buffer[infoOff+23]})//offsettodata
dataOff:=f.unpack([]byte{buffer[infoOff],buffer[infoOff+1],buffer[infoOff+2],buffer[infoOff+3]})
dataOff=dataOff-infoVirt

version1:=f.unpack([]byte{buffer[dataOff+48],buffer[dataOff+48+1]})
version2:=f.unpack([]byte{buffer[dataOff+48+2],buffer[dataOff+48+3]})
version3:=f.unpack([]byte{buffer[dataOff+48+4],buffer[dataOff+48+5]})
version4:=f.unpack([]byte{buffer[dataOff+48+6],buffer[dataOff+48+7]})

version:=fmt.Sprintf("%d.%d.%d.%d",version2,version1,version4,version3)
f.Version=version

returnnil
}

func(f*fileInfo)unpack(b[]byte)(numint64){
fori:=0;i<len(b);i++{
num=256*num+int64((b[len(b)-1-i]&0xff))
}
return
}

//获取apk版本
func(f*fileInfo)GetApkVersion()(errerror){
listener:=new(axmlParser.AppNameListener)
_,err=axmlParser.ParseApk(f.FilePath,listener)
f.checkError(err)

f.Version=listener.VersionName
returnnil
}

funcinit(){
flag.StringVar(&file.FilePath,"path",DEFAULT,"Getexeordllorapkversioninformation.")
flag.BoolVar(&file.Debug,"d",false,"iftrueprintexeordllfilename.")
}

funcmain(){
flag.Parse()

suffix:=filepath.Ext(file.FilePath)
switchsuffix{
case".exe",".dll":
file.GetExeVersion()
case".apk":
file.GetApkVersion()
default:
log.Fatalln("仅能获取exe、dll、apk版本号,请重新输入程序路径.",file.FilePath)
}

switch{
casefile.Debug:
fmt.Printf("%s的版本号为:",file.FilePath)
casefile.FilePath==DEFAULT:
flag.PrintDefaults()
fmt.Printf("%s的版本号为:",file.FilePath)
}

fmt.Printf("%s",file.Version)
}

（编辑：李大同）

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