XinYeYouKu/app/utils/encrypt/encrypt.go

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package encrypt
import (
"math/rand"
"unsafe"
)
const lettersString = "0123456789abcdefghijkmnpqrstuvwxyzABCDEFGHJKLMNPQRSTUVWXYZ"
// 字符串长度
const number = 16
/*
16位码前15位随机字符串最后一位通过前15位字符串计算校验生成
*/
func LotteryEncryptEncode() string {
b := make([]byte, number)
var sum byte
for i := 0; i < number-1; i++ {
b[i] = lettersString[rand.Int63()%int64(len(lettersString))]
sum += b[i]
}
b[number-1] = lettersString[sum%byte(len(lettersString))]
return *(*string)(unsafe.Pointer(&b))
}
func LotteryEncryptDecode(str string) bool {
var sum byte
for i := 0; i < len(str)-1; i++ {
sum += str[i]
}
if lettersString[sum%byte(len(lettersString))] != str[len(str)-1] {
return false
}
return true
}