Merge pull request #445 from RUB-NDS/more_weak_ciphers

Added isNull(), isWeak() to CipherSuite class.

Author: ic0ns

TLS-Core/src/main/java/de/rub/nds/tlsattacker/core/constants/CipherSuite.java

@@ -952,4 +952,13 @@ public boolean isSHA256() {
     public boolean isAnon() {
         return this.name().contains("anon");
     }
+
+    public boolean isNull() {
+        return this.name().toLowerCase().contains("null");
+    }
+
+    // Note: We don't consider DES as weak for these purposes.
+    public boolean isWeak() {
+        return this.isExport() || this.isExportSymmetricCipher() || this.isAnon() || this.isNull();
+    }
 }