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50 lines
844 B
50 lines
844 B
2 years ago
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package toolm
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import (
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"crypto/hmac"
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"crypto/sha256"
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"fmt"
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"math/rand"
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"time"
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)
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const (
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CharsAll = 1 << iota
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Digit
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LowerCase
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UpperCase
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)
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const (
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digit = "0123456789"
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lowercase = "abcdefghijklmnopqrstuvwxyz"
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uppercase = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
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//octal = "01234567"
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//hex = "0123456789abcdefg"
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)
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func RandString(l, chars int) string {
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charset := ""
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if chars&CharsAll > 0 {
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charset = digit + lowercase + uppercase
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}
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charsetLen := len(charset)
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seededRand := rand.New(rand.NewSource(time.Now().UnixNano()))
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b := make([]byte, l)
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for i := range b {
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b[i] = charset[seededRand.Intn(charsetLen)]
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}
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return string(b)
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}
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func Sha256HMacString(message, key string) string {
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mac := hmac.New(sha256.New, []byte(key))
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mac.Write([]byte(message))
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expectedMAC := mac.Sum(nil)
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return fmt.Sprintf("%X", expectedMAC)
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}
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