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elliptic curve stuff

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This commit is contained in:
Miek Gieben 2012-04-11 14:32:44 +02:00
parent 1083e5542e
commit a55014ff8a
2 changed files with 24 additions and 10 deletions
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20
dnssec.go
View File

@ -58,6 +58,7 @@ const (
SHA256 // RFC 4509 SHA256 // RFC 4509
GOST94 // RFC 5933 GOST94 // RFC 5933
SHA384 // Experimental SHA384 // Experimental
SHA512 // Experimental
) )
// DNSKEY flag values. // DNSKEY flag values.
@ -439,19 +440,17 @@ func (k *RR_DNSKEY) pubKeyCurve() *ecdsa.PublicKey {
if err != nil { if err != nil {
return nil return nil
} }
var c elliptic.Curve pubkey := new(ecdsa.PublicKey)
switch k.Algorithm { switch k.Algorithm {
case ECDSAP256SHA256Y: case ECDSAP256SHA256Y:
c = elliptic.P256() pubkey.Curve = elliptic.P256()
case ECDSAP384SHA384Y: case ECDSAP384SHA384Y:
c = elliptic.P384() pubkey.Curve = elliptic.P384()
} }
// This does not work, we need to split the buffer in two pubkey.X = big.NewInt(0)
x, y := elliptic.Unmarshal(c, keybuf) pubkey.X.SetBytes(keybuf[:len(keybuf)/2])
pubkey := new(ecdsa.PublicKey) pubkey.Y = big.NewInt(0)
pubkey.X = x pubkey.Y.SetBytes(keybuf[len(keybuf)/2:]) // +1?
pubkey.Y = y
pubkey.Curve = c
return pubkey return pubkey
} }
@ -494,7 +493,8 @@ func exponentToBuf(_E int) []byte {
return buf return buf
} }
// Set the public key for X and Y for Curve. Experiment. // Set the public key for X and Y for Curve. The two
// values are just concatenated.
func curveToBuf(_X, _Y *big.Int) []byte { func curveToBuf(_X, _Y *big.Int) []byte {
buf := _X.Bytes() buf := _X.Bytes()
buf = append(buf, _Y.Bytes()...) buf = append(buf, _Y.Bytes()...)

14
dnssec_test.go
View File

@ -31,6 +31,20 @@ func getSoa() *RR_SOA {
return soa return soa
} }
func TestGenerateEC(t *testing.T) {
key := new(RR_DNSKEY)
key.Hdr.Rrtype = TypeDNSKEY
key.Hdr.Name = "miek.nl."
key.Hdr.Class = ClassINET
key.Hdr.Ttl = 14400
key.Flags = 256
key.Protocol = 3
key.Algorithm = ECDSAP256SHA256Y
privkey, _ := key.Generate(256)
t.Logf("%s\n", key.String())
t.Logf("%s\n", key.PrivateKeyString(privkey))
}
func TestSecure(t *testing.T) { func TestSecure(t *testing.T) {
soa := getSoa() soa := getSoa()