first commit

clientsdk/cecdh/cecdh.go

@@ -0,0 +1,60 @@
+package cecdh
+
+//import "C"
+import (
+	"crypto/elliptic"
+	"crypto/md5"
+	"crypto/rand"
+)
+
+/*//GenerateEccKey GenerateEccKey2
+func GenerateEccKey() ([]byte, []byte) {
+	pubKeyBuf := make([]byte, 57)
+	priKeyBuf := make([]byte, 106)
+	cPubKeyBuf := getCharPointer(pubKeyBuf)
+	cPriKeyBuf := getCharPointer(priKeyBuf)
+	//https://tools.ietf.org/html/rfc5480 Sect409k1.nid = 731
+	C.GenerateECKey(713, cPubKeyBuf, cPriKeyBuf)
+	return pubKeyBuf, priKeyBuf
+}
+
+//ComputerECCKeyMD5 ComputerECCKeyMD52
+func ComputerECCKeyMD5(ecPubKey []byte, ecPriKey []byte) []byte {
+	cEcPubKey := getCharPointer(ecPubKey)
+	cEcPriKey := getCharPointer(ecPriKey)
+	outAesKey := make([]byte, 16)
+	cOutAesKey := getCharPointer(outAesKey)
+	cPubKeyLen := C.int(len(ecPubKey))
+	cPriKeyLen := C.int(len(ecPriKey))
+	C.ComputerECCKeyMD5(cEcPubKey, cPubKeyLen, cEcPriKey, cPriKeyLen, cOutAesKey)
+
+	return outAesKey
+}
+*/
+
+// GenerateEccKey GenerateEccKey2
+func GenerateEccKey() ([]byte, []byte) {
+	newEllipticECDH := NewEllipticECDH(elliptic.P224())
+	priKeyBuf, pubKeyBuf, err := newEllipticECDH.GenerateKey(rand.Reader)
+	if err != nil {
+		return []byte{}, []byte{}
+	}
+
+	return pubKeyBuf, priKeyBuf
+}
+
+// ComputerECCKeyMD5 ComputerECCKeyMD52
+func ComputerECCKeyMD5(ecPubKey []byte, ecPriKey []byte) []byte {
+	e := NewEllipticECDH(elliptic.P224())
+	srvPubKey, ok := e.Unmarshal(ecPubKey)
+	if !ok {
+		return []byte{}
+	}
+	pwd, err := e.GenerateSharedSecret(ecPriKey, srvPubKey)
+	if err != nil {
+		return []byte{}
+	}
+	ctx := md5.New()
+	_, _ = ctx.Write(pwd)
+	return ctx.Sum(nil)
+}