uniugm/admin/lib/cdkey/cdkey.go

package cdkey

/*
 * 奖励码模块，从神魔大陆java代码移植过来的
 */

func GenerateAll(batch int, totalCount int) []string {
	keyList := make([]string, 0, totalCount)
	for i := 0; i < totalCount; i++ {
		codeKey := GenerateOne(batch, totalCount, i)
		keyList = append(keyList, codeKey)
	}
	return keyList
}

func GenerateOne(batch int, totalCount int, curNo int) string {
	base := MAXNUM / totalCount
	numId := curNo
	num := base + numId*base
	mainKeyBitSet := newBitmap(MAIN_KEY_LENGTH, 0)
	numKeyIndex := int((num + batch) % NUM_KEY_LENGTH_BINARY)
	temp := newEncode(int64(num), numKeyIndex)
	for i := 0; i < MAIN_KEY_NUM_LENGTH; i++ {
		mainKeyBitSet.Set(i, (temp&1) == 1)
		temp >>= 1
	}
	for i := 0; i < NUM_KEY_LENGTH; i++ {
		mainKeyBitSet.Set(i+MAIN_KEY_NUM_LENGTH, toNumBitSet[numKeyIndex].Get(i))
	}

	var beCheckNum int64
	if mainKeyBitSet.toInt64() > 0 {
		beCheckNum = mainKeyBitSet.toInt64()
	} else {
		beCheckNum = -mainKeyBitSet.toInt64()
	}
	checkNum := int32(beCheckNum % 32)
	checkNumBitSet := toBitSet32[checkNum]
	for i := 0; i < CHECK_LENGTH; i++ {
		mainKeyBitSet.Set(i+MAIN_KEY_NUM_LENGTH+NUM_KEY_LENGTH, checkNumBitSet.Get(i))
	}
	batchBitSet := newBitmap(BATCH_LENGTH, 0)
	temp = int64(batch)
	for i := 0; i < BATCH_LENGTH; i++ {
		batchBitSet.Set(i, (temp&1) == 1)
		temp >>= 1
	}
	batchKeyIndex := (num + batch) % BATCH_KEY_LENGTH_BINARY
	batchStr := base32Encode(fakeRC4Encode(batchBitSet, batchKey[batchKeyIndex]))
	temp1 := fakeRC4Encode(mainKeyBitSet, getMainKey(batchBitSet))
	mainKeyStr := base32Encode(temp1)

	cdKeyType := 1
	typeIndex := (num + cdKeyType) % TYPE_LENGTH_BINARY

	codeKey := mainKeyStr + batchStr + string(toBase32[batchKeyIndex]) + string(toBase32[typeIndex])
	return shuffleCDKey(codeKey, batchKeyIndex)
}

type CDKeyInfo struct {
	Batch int
	Num   int64
}

func DecodeCDKey(cdKey string) (*CDKeyInfo, bool) {
	if len(cdKey) != CDKEY_LENGTH {
		return nil, false
	}
	index := toBase32CToI[rune(cdKey[SHUFFLE_INDEX])]
	cdKey1 := recoverCDKey(cdKey[0:SHUFFLE_INDEX], index)
	if cdKey1 == "" {
		return nil, false
	}
	typeCheck, find := toBase32CToI[rune(cdKey1[TYPE_INDEX])]
	if !find {
		return nil, false
	}
	batchKeyIndex, find := toBase32CToI[rune(cdKey1[BATCH_NUM_BEGIN])]
	if !find {
		return nil, false
	}
	if !(batchKeyIndex == index) {
		return nil, false
	}
	batch := base32Decode(cdKey1[BATCH_BEGIN:BATCH_END])
	if batch == nil {
		return nil, false
	}
	batchBitSet := fakeRC4Encode(batch, batchKey[batchKeyIndex])
	if batchBitSet == nil {
		return nil, false
	}
	mainKey := base32Decode(cdKey1[MAIN_KEY_BEGIN:MAIN_KEY_END])
	if mainKey == nil {
		return nil, false
	}
	mainKey2 := getMainKey(batchBitSet)
	if mainKey2 == nil {
		return nil, false
	}
	mainKeyBitSet := fakeRC4Encode(mainKey, mainKey2)
	if mainKeyBitSet == nil {
		return nil, false
	}
	if !(check(mainKeyBitSet)) {
		return nil, false
	}
	numKeyIndex := getNumKeyIndex(mainKeyBitSet)
	numInt := numEncode(mainKeyBitSet.toInt64()&intFormat, numKeyIndex)
	batchInt := int(batchBitSet.toInt64() & intFormat)
	if !(checkIndex(numInt, batchInt, batchKeyIndex, numKeyIndex)) {
		return nil, false
	}

	cdkeyInfo := &CDKeyInfo{
		Batch: batchInt,
		Num:   numInt,
		// Type: typeCheck,
	}
	if typeCheck > 0 {

	}
	return cdkeyInfo, true
}