mirror of
https://github.com/jsiebens/ionscale.git
synced 2026-03-31 15:07:49 +01:00
Johan Siebens
37 lines
633 B
Go
37 lines
633 B
Go
package util
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import (
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"math/rand"
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"time"
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)
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var entropy *rand.Rand
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func init() {
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seed := time.Now().UnixNano()
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source := rand.NewSource(seed)
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entropy = rand.New(source)
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}
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const letterBytes = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
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func RandStringBytes(n int) string {
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b := make([]byte, n)
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for i := range b {
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b[i] = letterBytes[rand.Intn(len(letterBytes))]
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}
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return string(b)
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}
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func RandUint64(n uint64) uint64 {
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return entropy.Uint64() % n
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}
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func RandomBytes(size int) ([]byte, error) {
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buf := make([]byte, size)
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if _, err := entropy.Read(buf); err != nil {
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return nil, err
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}
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return buf, nil
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}
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