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// Copyright (c) Tailscale Inc & AUTHORS
// SPDX-License-Identifier: BSD-3-Clause
package key
import (
"bytes"
"testing"
)
func TestRand(t *testing.T) {
var bs [32]byte
rand(bs[:])
if bs == [32]byte{} {
t.Fatal("rand didn't provide randomness")
}
var bs2 [32]byte
rand(bs2[:])
if bytes.Equal(bs[:], bs2[:]) {
t.Fatal("rand returned the same data twice")
}
}
func TestClamp25519Private(t *testing.T) {
for range 100 {
var k [32]byte
rand(k[:])
clamp25519Private(k[:])
if k[0]&0b111 != 0 {
t.Fatalf("Bogus clamping in first byte: %#08b", k[0])
return
}
if k[31]>>6 != 1 {
t.Fatalf("Bogus clamping in last byte: %#08b", k[0])
}
}
}
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