29 lines
801 B
Go
29 lines
801 B
Go
package pathiv
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import (
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"bytes"
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"encoding/hex"
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"testing"
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)
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// TestBlockIV makes sure we don't change the block iv derivation algorithm "BlockIV()"
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// inadvertedly.
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func TestBlockIV(t *testing.T) {
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b0 := make([]byte, 16)
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b0x := BlockIV(b0, 0)
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if !bytes.Equal(b0, b0x) {
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t.Errorf("b0x should be equal to b0")
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}
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b27 := BlockIV(b0, 0x27)
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expected, _ := hex.DecodeString("00000000000000000000000000000027")
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if !bytes.Equal(b27, expected) {
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t.Errorf("\nhave=%s\nwant=%s", hex.EncodeToString(b27), hex.EncodeToString(expected))
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}
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bff := bytes.Repeat([]byte{0xff}, 16)
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b28 := BlockIV(bff, 0x28)
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expected, _ = hex.DecodeString("ffffffffffffffff0000000000000027")
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if !bytes.Equal(b28, expected) {
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t.Errorf("\nhave=%s\nwant=%s", hex.EncodeToString(b28), hex.EncodeToString(expected))
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}
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}
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