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package protocol
import (
"crypto/rand"
)
// ChallengeLength - Length of bytes to generate for a challenge.
const ChallengeLength = 32
// CreateChallenge creates a new challenge that should be signed and returned by the authenticator. The spec recommends
// using at least 16 bytes with 100 bits of entropy. We use 32 bytes.
func CreateChallenge() (challenge URLEncodedBase64, err error) {
challenge = make([]byte, ChallengeLength)
if _, err = rand.Read(challenge); err != nil {
return nil, err
}
return challenge, nil
}
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