mirror of
https://github.com/Mrs4s/MiraiGo.git
synced 2025-05-04 11:07:40 +08:00
58 lines
1.0 KiB
Go
58 lines
1.0 KiB
Go
package auth
|
|
|
|
import (
|
|
"bytes"
|
|
"crypto/sha256"
|
|
"math/big"
|
|
"time"
|
|
|
|
"github.com/Mrs4s/MiraiGo/binary"
|
|
)
|
|
|
|
func CalcPow(data []byte) []byte {
|
|
r := binary.NewReader(data)
|
|
a := r.ReadByte()
|
|
typ := r.ReadByte()
|
|
c := r.ReadByte()
|
|
ok := r.ReadByte() != 0
|
|
e := r.ReadUInt16()
|
|
f := r.ReadUInt16()
|
|
src := r.ReadBytesShort()
|
|
tgt := r.ReadBytesShort()
|
|
cpy := r.ReadBytesShort()
|
|
|
|
var dst []byte
|
|
var elp, cnt uint32
|
|
if typ == 2 && len(tgt) == 32 {
|
|
start := time.Now()
|
|
tmp := new(big.Int).SetBytes(src)
|
|
hash := sha256.Sum256(tmp.Bytes())
|
|
one := big.NewInt(1)
|
|
for !bytes.Equal(hash[:], tgt) {
|
|
tmp = tmp.Add(tmp, one)
|
|
hash = sha256.Sum256(tmp.Bytes())
|
|
cnt++
|
|
}
|
|
ok = true
|
|
dst = tmp.Bytes()
|
|
elp = uint32(time.Since(start).Milliseconds())
|
|
}
|
|
|
|
w := binary.SelectWriter()
|
|
w.WriteByte(a)
|
|
w.WriteByte(typ)
|
|
w.WriteByte(c)
|
|
w.WriteBool(ok)
|
|
w.WriteUInt16(e)
|
|
w.WriteUInt16(f)
|
|
w.WriteBytesShort(src)
|
|
w.WriteBytesShort(tgt)
|
|
w.WriteBytesShort(cpy)
|
|
if ok {
|
|
w.WriteBytesShort(dst)
|
|
w.WriteUInt32(elp)
|
|
w.WriteUInt32(cnt)
|
|
}
|
|
return w.Bytes()
|
|
}
|