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32 lines
898 B
Go
32 lines
898 B
Go
package mqtt
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import (
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"crypto/rand"
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"github.com/sirupsen/logrus"
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"encoding/base64"
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)
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// https://elithrar.github.io/article/generating-secure-random-numbers-crypto-rand/
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// GenerateRandomBytes returns securely generated random bytes.
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// It will fail with a fatal log if the system's secure random
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// number generator fails to function correctly
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func GenerateRandomBytes(n int) []byte {
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b := make([]byte, n)
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if _, err := rand.Read(b); err != nil {
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// Note that err == nil only if we read len(b) bytes.
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logrus.Fatal("Could not read random bytes")
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}
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return b
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}
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// GenerateRandomString returns a URL-safe, base64 encoded
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// securely generated random string.
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// It will fail with a fatal log if the system's secure random
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// number generator fails to function correctly
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func GenerateRandomString(s int) string {
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b := GenerateRandomBytes(s)
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return base64.URLEncoding.EncodeToString(b)
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}
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