76 lines
1.9 KiB
Go
76 lines
1.9 KiB
Go
package kdf
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import (
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"bytes"
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"testing"
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)
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func TestCounterMode(t *testing.T) {
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key := []byte{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16}
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context := []byte("the quick brown fox")
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prf := HMACSHA256PRF
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prfLen := HMACSHA256PRFLen
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// Expect256 was generated in python with
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// import hashlib, hmac
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// hash = hashlib.sha256
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// context = "the quick brown fox"
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// key = "".join([chr(x) for x in range(1, 17)])
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// inp = "\x00\x00\x00\x00"+context+"\x00\x00\x01\x00"
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// digest = hmac.HMAC(key, inp, hash).digest()
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// print [ord(x) for x in digest]
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expect256 := []byte{
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219, 25, 238, 6, 185, 236, 180, 64, 248, 152, 251,
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153, 79, 5, 141, 222, 66, 200, 66, 143, 40, 3, 101, 221, 206, 163, 102,
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80, 88, 234, 87, 157,
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}
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for _, l := range []uint32{128, 256, 384, 1024} {
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out, err := CounterMode(prf, prfLen, key, context, l)
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if err != nil {
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t.Fatalf("err: %v", err)
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}
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if uint32(len(out)*8) != l {
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t.Fatalf("bad length: %#v", out)
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}
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if bytes.Contains(out, key) {
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t.Fatalf("output contains key")
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}
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if l == 256 && !bytes.Equal(out, expect256) {
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t.Fatalf("mis-match")
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}
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}
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}
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func TestHMACSHA256PRF(t *testing.T) {
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key := []byte{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16}
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data := []byte("foobarbaz")
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out, err := HMACSHA256PRF(key, data)
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if err != nil {
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t.Fatalf("err: %v", err)
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}
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if uint32(len(out)*8) != HMACSHA256PRFLen {
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t.Fatalf("Bad len")
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}
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// Expect was generated in python with:
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// import hashlib, hmac
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// hash = hashlib.sha256
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// msg = "foobarbaz"
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// key = "".join([chr(x) for x in range(1, 17)])
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// hm = hmac.HMAC(key, msg, hash)
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// print [ord(x) for x in hm.digest()]
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expect := []byte{
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9, 50, 146, 8, 188, 130, 150, 107, 205, 147, 82, 170,
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253, 183, 26, 38, 167, 194, 220, 111, 56, 118, 219, 209, 31, 52, 137,
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90, 246, 133, 191, 124,
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}
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if !bytes.Equal(expect, out) {
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t.Fatalf("mis-matched output")
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}
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}
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