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Added support for cryptMTv1

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Signed-off-by: Russ Magee <rmagee@gmail.com>
This commit is contained in:
Russ Magee 2018-10-24 00:15:33 -07:00
parent 97791544ab
commit 4cb535fcc9
4 changed files with 14 additions and 1 deletions
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1
hkexnet/consts.go
View file

@ -61,6 +61,7 @@ const (
CAlgAES256 = iota
CAlgTwofish128 // golang.org/x/crypto/twofish
CAlgBlowfish64 // golang.org/x/crypto/blowfish
CAlgCryptMT1 //cryptmt using mtwist64
CAlgNoneDisallowed
)

8
hkexnet/hkexchan.go
View file

@ -22,6 +22,7 @@ import (
"golang.org/x/crypto/blowfish"
"golang.org/x/crypto/twofish"
"blitter.com/go/cryptmt"
// hash algos must be manually imported thusly:
// (Would be nice if the golang pkg docs were more clear
// on this...)
@ -34,6 +35,9 @@ import (
// This is occasionally necessary for smaller modes of KEX algorithms
// (eg., KEX_HERRADURA256); perhaps an indication these should be
// avoided in favour of larger modes.
//
// This is used for block ciphers; stream ciphers should do their
// own key expansion.
func expandKeyMat(keymat []byte, blocksize int) []byte {
if len(keymat) < 2*blocksize {
halg := crypto.SHA256
@ -99,6 +103,10 @@ func (hc Conn) getStream(keymat []byte) (rc cipher.Stream, mc hash.Hash, err err
rc = cipher.NewOFB(block, iv)
log.Printf("[cipher BLOWFISH_64 (%d)]\n", copts)
break
case CAlgCryptMT1:
rc = cryptmt.NewCipher(keymat)
log.Printf("[cipher CRYPTMT1 (%d)]\n", copts)
break
default:
log.Printf("[invalid cipher (%d)]\n", copts)
fmt.Printf("DOOFUS SET A VALID CIPHER ALG (%d)\n", copts)

4
hkexnet/hkexnet.go
View file

@ -230,6 +230,10 @@ func (hc *Conn) applyConnExtensions(extensions ...string) {
log.Println("[extension arg = C_BLOWFISH_64]")
hc.cipheropts &= (0xFFFFFF00)
hc.cipheropts |= CAlgBlowfish64
case "C_CRYPTMT1":
log.Println("[extension arg = C_CRYPTMT1]")
hc.cipheropts &= (0xFFFFFF00)
hc.cipheropts |= CAlgCryptMT1
case "H_SHA256":
log.Println("[extension arg = H_SHA256]")
hc.cipheropts &= (0xFFFF00FF)

2
hkexsh/hkexsh.go
View file

@ -372,7 +372,7 @@ func main() {
flag.BoolVar(&vopt, "v", false, "show version")
flag.BoolVar(&dbg, "d", false, "debug logging")
flag.StringVar(&cAlg, "c", "C_AES_256", "`cipher` [\"C_AES_256\" | \"C_TWOFISH_128\" | \"C_BLOWFISH_64\"]")
flag.StringVar(&cAlg, "c", "C_AES_256", "`cipher` [\"C_AES_256\" | \"C_TWOFISH_128\" | \"C_BLOWFISH_64\" | \"C_CRYPTMT1\"]")
flag.StringVar(&hAlg, "m", "H_SHA256", "`hmac` [\"H_SHA256\"]")
flag.StringVar(&kAlg, "k", "KEX_HERRADURA256", "`kex` [\"KEX_HERRADURA{256/512/1024/2048}\" | \"KEX_KYBER{512/768/1024}\"]")
flag.UintVar(&port, "p", 2000, "`port`")