fixed broken XAUTH authentication

src/pluto/crypto.c

@@ -258,6 +258,26 @@ pseudo_random_function_t oakley_to_prf(int alg)
 	}
 }
 
+/**
+ * Maps IKEv1 authentication method to IKEv2 signature scheme
+ */
+signature_scheme_t oakley_to_signature_scheme(int method)
+{
+	switch (method)
+	{
+		case OAKLEY_RSA_SIG:
+		case XAUTHInitRSA:
+		case XAUTHRespRSA:
+			return SIGN_RSA_EMSA_PKCS1_NULL;
+		case OAKLEY_ECDSA_256:
+		case OAKLEY_ECDSA_384:
+		case OAKLEY_ECDSA_512:
+			return SIGN_ECDSA_WITH_NULL;
+		default:
+			return SIGN_UNKNOWN;
+	}
+}
+
 /**
  * Converts IKEv2 encryption to IKEv1 encryption algorithm
  */