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password.go
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password.go
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package utils
import (
"math/rand"
"strings"
"time"
)
var (
lowerCharSet = "abcdedfghijklmnopqrst"
upperCharSet = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
specialCharSet = "!@#$%&*"
numberSet = "0123456789"
allCharSet = lowerCharSet + upperCharSet + specialCharSet + numberSet
)
// GeneratePassword will generate a password on the minimum length
func GeneratePassword(passwordLength, minSpecialChar, minNum, minUpperCase int) string {
rand.Seed(time.Now().UTC().UnixNano())
var password strings.Builder
//Set special character
for i := 0; i < minSpecialChar; i++ {
random := rand.Intn(len(specialCharSet))
password.WriteString(string(specialCharSet[random]))
}
//Set numeric
for i := 0; i < minNum; i++ {
random := rand.Intn(len(numberSet))
password.WriteString(string(numberSet[random]))
}
//Set uppercase
for i := 0; i < minUpperCase; i++ {
random := rand.Intn(len(upperCharSet))
password.WriteString(string(upperCharSet[random]))
}
remainingLength := passwordLength - minSpecialChar - minNum - minUpperCase
for i := 0; i < remainingLength; i++ {
random := rand.Intn(len(allCharSet))
password.WriteString(string(allCharSet[random]))
}
inRune := []rune(password.String())
rand.Shuffle(len(inRune), func(i, j int) {
inRune[i], inRune[j] = inRune[j], inRune[i]
})
return string(inRune)
}