/
parsemsg.go
272 lines (247 loc) · 6.82 KB
/
parsemsg.go
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package parse
import (
"bytes"
"encoding/binary"
"fmt"
"io/ioutil"
"log"
"os"
"strconv"
"strings"
"time"
"github.com/oucema001/OutlookMessageParser-go/models"
"github.com/richardlehane/mscfb"
"golang.org/x/net/html/charset"
)
const PropsKey = "__properties_version1.0"
// PropertyStreamPrefix is the prefix used for a property stream in the msg binary
const PropertyStreamPrefix = "__substg1.0_"
// ReplyToRegExp is a regex to extract the reply to header
const ReplyToRegExp = "^Reply-To:\\s*(?:<?(?<nameOrAddress>.*?)>?)?\\s*(?:<(?<address>.*?)>)?$"
//AnalyzeMsgFile analyzes the msg file and sets the properties
func AnalyzeMsgFile(file string) (res *models.Message, err error) {
res = &models.Message{}
f, err := os.Open(file)
if err != nil {
return nil, err
}
doc, err := mscfb.New(f)
if err != nil {
return nil, err
}
err = checkEntries(doc, res)
//fmt.Println(res)
if err != nil {
return nil, err
}
return res, nil
}
func checkEntries(doc *mscfb.Reader, res *models.Message) error {
var err error
for entry, err := doc.Next(); err == nil; entry, err = doc.Next() {
if strings.HasPrefix(entry.Name, PropertyStreamPrefix) {
msg := outlookMessageProperty(entry)
res.SetProperties(msg)
}
}
return err
}
func outlookMessageProperty(entry *mscfb.File) models.MessageProperty {
analysis := analyzeEntry(entry)
data := getData(entry, analysis)
messageProperty := models.MessageProperty{
Class: analysis.Class,
Mapi: analysis.Mapi,
Data: data,
}
return messageProperty
}
func getData(entry *mscfb.File, info models.OutlookMessageInformation) interface{} {
if info.Class == "" {
return "class null"
}
mapi := info.Mapi
switch mapi {
case -1:
return "-1"
case 0x1e:
bytes2 := make([]byte, entry.Size)
entry.Read(bytes2)
read, _ := charset.NewReader(bytes.NewReader(bytes2), "ISO-8859-1")
if read != nil {
resu, _ := ioutil.ReadAll(read)
_ = resu
return string(resu)
}
//return "type : : : 0X1E"
case 0x1f:
bytes2 := make([]byte, entry.Size)
entry.Read(bytes2)
//fmt.Println("++++++++++++++++++++", string(bytes2))
// read, _ := charset.NewReader(bytes.NewReader(bytes2), "utf-16")
runes := make([]rune, len(bytes2)/2)
c := 0
for i := 0; i < len(bytes2)-1; i = i + 2 {
ch := (int)(bytes2[i+1])
cl := (int)(bytes2[i]) & 0xff
runes[c] = (rune)((ch << 8) + cl)
c++
}
return string(runes)
case 0x102:
return "type : : : 0x102"
case 0x40:
bytes := make([]byte, entry.Size)
entry.Read(bytes)
buf := make([]byte, 8, 8)
if len(bytes) > 0 {
buf = bytes[0 : len(bytes)-1]
a := binary.BigEndian.Uint64(buf)
a /= 10000
a -= 11644473600000
//return time.Date(a).String()
return "type : : : 0x40" + time.Unix(0, int64(a)).String()
}
return "type : : : 0x40"
default:
return "default mapi : " + string(mapi)
}
return ""
}
//getEntriesFromDoc get properties from directory entry embedded TODO and TOCOMPLETE
func getEntriesFromDoc(entry *mscfb.File) []mscfb.File {
result := make([]mscfb.File, 2)
headerLength := 4
flagsLength := 4
bufHeader := make([]byte, headerLength)
//bufHeader = buf[0:headerLength]
var header strings.Builder
//fmt.Println("hello")
for k, err := entry.Read(bufHeader); err == nil && k > 0 && len(bufHeader) == headerLength; k, err = entry.Read(bufHeader) {
//fmt.Println(err)
//fmt.Println("hello")
b, _ := entry.Seek(4, 1)
_ = b
header.Reset()
//j := 0
for i := len(bufHeader) - 1; i >= 0; i-- {
header.WriteString(bytesToHex(bufHeader[i]))
//fmt.Println("byte : ", bufHeader[j])
//j++
}
class := header.String()[0:4]
typeEntry := header.String()[4:]
if typeEntry != "" {
typeNumber, err := strconv.ParseInt(typeEntry, 16, 32)
if err != nil {
log.Print("Parse Error")
}
//fmt.Println("type number : ", typeNumber)
if class != "0000" {
bytes2 := make([]byte, flagsLength)
entry.Read(bytes2)
entry.Seek((int64)(len(bytes2)), 1)
var k strings.Builder
for _, b := range bytes2 {
k.WriteString(bytesToHex(b))
}
//fmt.Println("flags : ", k.String())
if typeNumber == 0x48 || typeNumber == 0x1e || typeNumber == 0x1f || typeNumber == 0xd || typeNumber == 0x102 {
//bytes1 := make([]byte, 4)
//bytes2 = nil
//fmt.Println("x")
bytes2 = make([]byte, 4, 4)
entry.Seek((int64)(cap(bytes2)), 1)
} else if typeNumber == 0x3 || typeNumber == 0x4 || typeNumber == 0xa || typeNumber == 0xb || typeNumber == 0x2 {
//SHORT
// 4 bytes
//bytes2 = nil
//fmt.Println("y")
bytes2 = make([]byte, 8, 8)
entry.Read(bytes2[:4])
entry.Seek((int64)(len(bytes2)), 1)
entry.Read(bytes2[:8])
entry.Seek((int64)(len(bytes2)), 1)
//entry.Read(bytes2)
//entry.Seek((int64)(len(bytes2)), 1)
} else if typeNumber == 0x5 || typeNumber == 0x7 || typeNumber == 0x6 || typeNumber == 0x14 || typeNumber == 0x40 {
// 8 bytes
//bytes2 = nil
//buf := make([]byte, 8, 8)
bytes2 = make([]byte, 8, 8)
entry.Read(bytes2)
entry.Seek((int64)(cap(bytes2)), 1)
//fmt.Println("8 bytes : ", len(bytes2))
//fmt.Println("value : ", string(bytes2))
//fmt.Println("number : ", typeNumber)
//fmt.Println("buf size : ", len(buf))
var SEC_TO_UNIX_EPOCH int64
SEC_TO_UNIX_EPOCH = 11644473600
var WINDOWS_TICK int64
WINDOWS_TICK = 10000000
a := int64(binary.BigEndian.Uint64(bytes2))
fmt.Println("first : ", int64(a))
a = (a / WINDOWS_TICK) - SEC_TO_UNIX_EPOCH
b := a / 10000
b = b - 11644473600000
fmt.Println("milli : ", b)
fmt.Println(time.Unix(a, 0).String())
}
if bytes2 != nil {
name := "__substg1.0_" + header.String()
var initial uint16
initial = 95
//var r io.Reade
//a := smd.New()
smd := new(mscfb.File)
smd = &mscfb.File{
Name: name,
Initial: initial,
Path: []string{header.String()},
Size: 10000,
//i: 0,
// i : 0,
//r: &r,
}
//s,error:= mscfb.New()
leng := (int64)(len("__substg1.0_"))
_ = leng
_ = smd
if bytes2 != nil {
fmt.Println(string(bytes2))
}
}
bytes2 = nil
bufHeader = nil
bufHeader = make([]byte, headerLength)
header.Reset()
}
}
}
return result
}
func analyzeEntry(entry *mscfb.File) models.OutlookMessageInformation {
name := entry.Name
res := models.OutlookMessageInformation{}
if strings.HasPrefix(name, PropertyStreamPrefix) {
var class string
var typeEntry string
var mapi int64
val := name[len(PropertyStreamPrefix):]
class = val[0:4]
typeEntry = val[4:8]
mapi, err := strconv.ParseInt(typeEntry, 16, 64)
if err != nil {
log.Println(err)
}
res = models.OutlookMessageInformation{
Class: class,
Mapi: mapi,
}
}
return res
}
func bytesToHex(bytes byte) string {
//fmt.Printf("%02x", bytes&0xff)
return fmt.Sprintf("%02x", bytes&0xff)
}