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45 lines
1.2 KiB
Go
45 lines
1.2 KiB
Go
package rosenpass
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import (
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"strings"
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"testing"
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"github.com/stretchr/testify/require"
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)
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func TestDeterministicSeedKey_SameForBothSides(t *testing.T) {
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// Peer A and peer B must derive the same PSK regardless of which side
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// computes it: the function orders inputs internally.
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a := strings.Repeat("a", 32)
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b := strings.Repeat("b", 32)
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keyAB, err := DeterministicSeedKey(a, b)
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require.NoError(t, err)
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keyBA, err := DeterministicSeedKey(b, a)
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require.NoError(t, err)
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require.Equal(t, keyAB.String(), keyBA.String(), "swapping arguments must yield identical key")
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}
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func TestDeterministicSeedKey_ChangesWithKeys(t *testing.T) {
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a := strings.Repeat("a", 32)
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b := strings.Repeat("b", 32)
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c := strings.Repeat("c", 32)
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keyAB, err := DeterministicSeedKey(a, b)
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require.NoError(t, err)
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keyAC, err := DeterministicSeedKey(a, c)
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require.NoError(t, err)
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require.NotEqual(t, keyAB.String(), keyAC.String(), "different peer pair must yield different key")
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}
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func TestDeterministicSeedKey_TooShortKey_ReturnsError(t *testing.T) {
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short := "short" // < 16 bytes
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long := strings.Repeat("x", 32)
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_, err := DeterministicSeedKey(short, long)
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require.Error(t, err)
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_, err = DeterministicSeedKey(long, short)
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require.Error(t, err)
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}
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