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Added enforcement of min/max vals for chaff freq, bytesize

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Made HerraduraKEx 512 default KEx (was HerraduraKEx 256)

Signed-off-by: Russ Magee <rmagee@gmail.com>
This commit is contained in:
Russ Magee 2019-07-03 09:50:37 -07:00
parent 3a720cfb8e
commit 825429003b
2 changed files with 23 additions and 1 deletions
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13
hkexsh/hkexsh.go
View file

@ -620,7 +620,7 @@ func main() {
flag.BoolVar(&dbg, "d", false, "debug logging")
flag.StringVar(&cipherAlg, "c", "C_AES_256", "`cipher` [\"C_AES_256\" | \"C_TWOFISH_128\" | \"C_BLOWFISH_64\" | \"C_CRYPTMT1\"]")
flag.StringVar(&hmacAlg, "m", "H_SHA256", "`hmac` [\"H_SHA256\" | \"H_SHA512\"]")
flag.StringVar(&kexAlg, "k", "KEX_HERRADURA256", "`kex` [\"KEX_HERRADURA{256/512/1024/2048}\" | \"KEX_KYBER{512/768/1024}\" | \"KEX_NEWHOPE\" | \"KEX_NEWHOPE_SIMPLE\"]")
flag.StringVar(&kexAlg, "k", "KEX_HERRADURA512", "`kex` [\"KEX_HERRADURA{256/512/1024/2048}\" | \"KEX_KYBER{512/768/1024}\" | \"KEX_NEWHOPE\" | \"KEX_NEWHOPE_SIMPLE\"]")
flag.UintVar(&port, "p", 2000, "`port`")
//flag.StringVar(&authCookie, "a", "", "auth cookie")
flag.BoolVar(&chaffEnabled, "e", true, "enable chaff pkts")
@ -764,6 +764,17 @@ func main() {
}
}
// Enforce some sane min/max vals on chaff flags
if chaffFreqMin < 2 {
chaffFreqMin = 2
}
if chaffFreqMax == 0 {
chaffFreqMax = chaffFreqMin + 1
}
if chaffBytesMax == 0 || chaffBytesMax > 4096 {
chaffBytesMax = 64
}
if shellMode {
// We must make the decision about interactivity before Dial()
// as it affects chaffing behaviour. 20180805

11
hkexshd/hkexshd.go
View file

@ -406,6 +406,17 @@ func main() {
}
}
// Enforce some sane min/max vals on chaff flags
if chaffFreqMin < 2 {
chaffFreqMin = 2
}
if chaffFreqMax == 0 {
chaffFreqMax = chaffFreqMin + 1
}
if chaffBytesMax == 0 || chaffBytesMax > 4096 {
chaffBytesMax = 64
}
Log, _ = logger.New(logger.LOG_DAEMON|logger.LOG_DEBUG|logger.LOG_NOTICE|logger.LOG_ERR, "hkexshd") // nolint: gosec
hkexnet.Init(dbg, "hkexshd", logger.LOG_DAEMON|logger.LOG_DEBUG|logger.LOG_NOTICE|logger.LOG_ERR)
if dbg {