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