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generatePassword.go
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generatePassword.go
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package genPasswd
import (
"fmt"
"math/rand"
"time"
)
const (
numStr = "0123456789"
lowerCharStr = "abcdefghijklmnopqrstuvwxyz"
upperCharStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
specCharStr = "+=-@#~,.[]()!%^*$"
)
const (
FlagNumber = 0b1
FlagLowerChar = 0b10
FlagUpperChar = 0b100
FlagSpecialChar = 0b1000
)
func GeneratePasswd(pwLen int, pwType int) string {
//初始化密码切片
var passwd []byte = make([]byte, pwLen, pwLen)
//根据密码字符类型合成字符源
sourceNum := ""
if pwType&FlagNumber != 0 {
sourceNum = numStr
}
sourceLowerChar := ""
if pwType&FlagLowerChar != 0 {
sourceLowerChar = lowerCharStr
}
sourceUpperChar := ""
if pwType&FlagUpperChar != 0 {
sourceUpperChar = upperCharStr
}
sourceSpecialChar := ""
if pwType&FlagSpecialChar != 0 {
sourceSpecialChar = specCharStr
}
sourceStr := fmt.Sprintf("%s%s%s%s", sourceNum, sourceLowerChar, sourceUpperChar, sourceSpecialChar)
//遍历,生成一个随机index索引,
for i := 0; i < pwLen; i++ {
index := rand.Intn(len(sourceStr))
passwd[i] = sourceStr[index]
}
return string(passwd)
}
func RandomSeed() {
//随机种子
rand.Seed(time.Now().UnixNano())
}