#358 Create encryption method supertypes, add new methods

src/main/java/fr/xephi/authme/security/crypts/HexSaltedMethod.java

@@ -0,0 +1,46 @@
+package fr.xephi.authme.security.crypts;
+
+import fr.xephi.authme.security.RandomString;
+import fr.xephi.authme.security.crypts.description.HasSalt;
+import fr.xephi.authme.security.crypts.description.Recommendation;
+import fr.xephi.authme.security.crypts.description.SaltType;
+import fr.xephi.authme.security.crypts.description.Usage;
+
+/**
+ * Common type for encryption methods which use a random String of hexadecimal characters
+ * and store the salt with the hash itself.
+ */
+@Recommendation(Usage.ACCEPTABLE)
+@HasSalt(SaltType.TEXT) // See saltLength() for length
+public abstract class HexSaltedMethod implements NewEncrMethod {
+
+    public abstract int getSaltLength();
+
+    @Override
+    public abstract String computeHash(String password, String salt, String name);
+
+    @Override
+    public HashResult computeHash(String password, String name) {
+        String salt = generateSalt();
+        return new HashResult(computeHash(password, salt, null));
+    }
+
+    @Override
+    public abstract boolean comparePassword(String hash, String password, String salt, String name);
+
+    @Override
+    @Deprecated
+    public boolean comparePassword(String hash, String password, String playerName) {
+        return false;
+    }
+
+    @Override
+    public String generateSalt() {
+        return RandomString.generateHex(getSaltLength());
+    }
+
+    @Override
+    public boolean hasSeparateSalt() {
+        return false;
+    }
+}