mirror of
https://github.com/Mrs4s/MiraiGo.git
synced 2025-05-05 03:23:50 +08:00
58 lines
1.0 KiB
Go
58 lines
1.0 KiB
Go
package auth
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import (
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"bytes"
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"crypto/sha256"
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"math/big"
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"time"
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"github.com/Mrs4s/MiraiGo/binary"
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)
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func CalcPow(data []byte) []byte {
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r := binary.NewReader(data)
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a := r.ReadByte()
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typ := r.ReadByte()
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c := r.ReadByte()
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ok := r.ReadByte() != 0
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e := r.ReadUInt16()
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f := r.ReadUInt16()
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src := r.ReadBytesShort()
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tgt := r.ReadBytesShort()
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cpy := r.ReadBytesShort()
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var dst []byte
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var elp, cnt uint32
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if typ == 2 && len(tgt) == 32 {
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start := time.Now()
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tmp := new(big.Int).SetBytes(src)
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hash := sha256.Sum256(tmp.Bytes())
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one := big.NewInt(1)
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for !bytes.Equal(hash[:], tgt) {
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tmp = tmp.Add(tmp, one)
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hash = sha256.Sum256(tmp.Bytes())
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cnt++
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}
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ok = true
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dst = tmp.Bytes()
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elp = uint32(time.Since(start).Milliseconds())
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}
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w := binary.SelectWriter()
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w.WriteByte(a)
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w.WriteByte(typ)
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w.WriteByte(c)
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w.WriteBool(ok)
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w.WriteUInt16(e)
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w.WriteUInt16(f)
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w.WriteBytesShort(src)
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w.WriteBytesShort(tgt)
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w.WriteBytesShort(cpy)
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if ok {
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w.WriteBytesShort(dst)
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w.WriteUInt32(elp)
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w.WriteUInt32(cnt)
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}
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return w.Bytes()
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}
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