package main
import (
"fmt"
"io/ioutil"
"log"
"os"
"strings"
)
func main() {
path := os.Args[1]
rd, err := ioutil.ReadDir(path)
if err != nil {
fmt.Println("open file path error:", err.Error())
}
for _, fi := range rd {
fullName := path + "/" +fi.Name()
fmt.Println("Converting " + fullName)
convert(fullName)
fmt.Println("Done.")
}
}
func encrypt(offset int, buf []byte, len int) int {
if offset < 0 {
return -1
}
for i := 0; i < len; i++ {
buf[i] ^= mapL(offset + i)
}
return 0
}
func mapL(v int) byte {
key := []byte{
0x77, 0x48, 0x32, 0x73, 0xDE, 0xF2, 0xC0, 0xC8, 0x95, 0xEC, 0x30, 0xB2,
0x51, 0xC3, 0xE1, 0xA0, 0x9E, 0xE6, 0x9D, 0xCF, 0xFA, 0x7F, 0x14, 0xD1,
0xCE, 0xB8, 0xDC, 0xC3, 0x4A, 0x67, 0x93, 0xD6, 0x28, 0xC2, 0x91, 0x70,
0xCA, 0x8D, 0xA2, 0xA4, 0xF0, 0x08, 0x61, 0x90, 0x7E, 0x6F, 0xA2, 0xE0,
0xEB, 0xAE, 0x3E, 0xB6, 0x67, 0xC7, 0x92, 0xF4, 0x91, 0xB5, 0xF6, 0x6C,
0x5E, 0x84, 0x40, 0xF7, 0xF3, 0x1B, 0x02, 0x7F, 0xD5, 0xAB, 0x41, 0x89,
0x28, 0xF4, 0x25, 0xCC, 0x52, 0x11, 0xAD, 0x43, 0x68, 0xA6, 0x41, 0x8B,
0x84, 0xB5, 0xFF, 0x2C, 0x92, 0x4A, 0x26, 0xD8, 0x47, 0x6A, 0x7C, 0x95,
0x61, 0xCC, 0xE6, 0xCB, 0xBB, 0x3F, 0x47, 0x58, 0x89, 0x75, 0xC3, 0x75,
0xA1, 0xD9, 0xAF, 0xCC, 0x08, 0x73, 0x17, 0xDC, 0xAA, 0x9A, 0xA2, 0x16,
0x41, 0xD8, 0xA2, 0x06, 0xC6, 0x8B, 0xFC, 0x66, 0x34, 0x9F, 0xCF, 0x18,
0x23, 0xA0, 0x0A, 0x74, 0xE7, 0x2B, 0x27, 0x70, 0x92, 0xE9, 0xAF, 0x37,
0xE6, 0x8C, 0xA7, 0xBC, 0x62, 0x65, 0x9C, 0xC2, 0x08, 0xC9, 0x88, 0xB3,
0xF3, 0x43, 0xAC, 0x74, 0x2C, 0x0F, 0xD4, 0xAF, 0xA1, 0xC3, 0x01, 0x64,
0x95, 0x4E, 0x48, 0x9F, 0xF4, 0x35, 0x78, 0x95, 0x7A, 0x39, 0xD6, 0x6A,
0xA0, 0x6D, 0x40, 0xE8, 0x4F, 0xA8, 0xEF, 0x11, 0x1D, 0xF3, 0x1B, 0x3F,
0x3F, 0x07, 0xDD, 0x6F, 0x5B, 0x19, 0x30, 0x19, 0xFB, 0xEF, 0x0E, 0x37,
0xF0, 0x0E, 0xCD, 0x16, 0x49, 0xFE, 0x53, 0x47, 0x13, 0x1A, 0xBD, 0xA4,
0xF1, 0x40, 0x19, 0x60, 0x0E, 0xED, 0x68, 0x09, 0x06, 0x5F, 0x4D, 0xCF,
0x3D, 0x1A, 0xFE, 0x20, 0x77, 0xE4, 0xD9, 0xDA, 0xF9, 0xA4, 0x2B, 0x76,
0x1C, 0x71, 0xDB, 0x00, 0xBC, 0xFD, 0xC, 0x6C, 0xA5, 0x47, 0xF7, 0xF6,
0x00, 0x79, 0x4A, 0x11}
if v >= 0 {
if v > 0x7FFF {
v %= 0x7FFF
}
} else {
v = 0
}
return key[(v*v+80923)%256]
}
func convert(in string) bool {
rindex:=strings.LastIndex(in,".")
name:=in[:rindex]
e:=in[rindex+1:]
ext:=""
if e=="qmcflac" || e=="mflac"{
ext="flac"
} else if e=="qmc0" || e=="qmc3"{
ext="mp3"
}
fin,err:=os.Open(in)
if err!=nil{
log.Fatal("cannot open "+in)
return false
}
fout,err:=os.Create(name+"."+ext)
if err!=nil{
log.Fatal("cannot create new file.")
return false
}
defer fin.Close()
defer fout.Close()
stat,_:=fin.Stat()
buf:=make([]byte,stat.Size())
fin.Read(buf)
encrypt(0,buf,len(buf))
fout.Write(buf)
return true
}