47 lines
1.4 KiB
Go
47 lines
1.4 KiB
Go
package cryptocore
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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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type hkdfTestCase struct {
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masterkey []byte
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info string
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out []byte
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}
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// TestHkdfDerive verifies that we get the expected values from hkdfDerive. They
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// must not change because this would change the on-disk format.
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func TestHkdfDerive(t *testing.T) {
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master0 := bytes.Repeat([]byte{0x00}, 32)
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master1 := bytes.Repeat([]byte{0x01}, 32)
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out1, _ := hex.DecodeString("9ba3cddd48c6339c6e56ebe85f0281d6e9051be4104176e65cb0f8a6f77ae6b4")
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out2, _ := hex.DecodeString("e8a2499f48700b954f31de732efd04abce822f5c948e7fbc0896607be0d36d12")
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out3, _ := hex.DecodeString("9137f2e67a842484137f3c458f357f204c30d7458f94f432fa989be96854a649")
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out4, _ := hex.DecodeString("0bfa5da7d9724d4753269940d36898e2c0f3717c0fee86ada58b5fd6c08cc26c")
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testCases := []hkdfTestCase{
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{master0, "EME filename encryption", out1},
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{master0, hkdfInfoEMENames, out1},
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{master1, "EME filename encryption", out2},
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{master1, hkdfInfoEMENames, out2},
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{master1, "AES-GCM file content encryption", out3},
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{master1, hkdfInfoGCMContent, out3},
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{master1, "AES-SIV file content encryption", out4},
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{master1, hkdfInfoSIVContent, out4},
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}
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for i, v := range testCases {
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out := hkdfDerive(v.masterkey, v.info, 32)
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if !bytes.Equal(out, v.out) {
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want := hex.EncodeToString(v.out)
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have := hex.EncodeToString(out)
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t.Errorf("testcase %d error:\n"+
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"want=%s\n"+
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"have=%s", i, want, have)
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}
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}
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}
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