Rename some stuff for clarity.

src/main/java/com/velocitypowered/proxy/util/EncryptionUtils.java

@@ -17,7 +17,7 @@ public enum EncryptionUtils {
         }
     }
 
-    public static String twosComplementSha1Digest(byte[] digest) {
+    public static String twosComplementHexdigest(byte[] digest) {
         return new BigInteger(digest).toString(16);
     }
 
@@ -32,7 +32,7 @@ public enum EncryptionUtils {
             MessageDigest digest = MessageDigest.getInstance("SHA-1");
             digest.update(sharedSecret);
             digest.update(key.getEncoded());
-            return twosComplementSha1Digest(digest.digest());
+            return twosComplementHexdigest(digest.digest());
         } catch (NoSuchAlgorithmException e) {
             throw new AssertionError(e);
         }

src/test/java/com/velocitypowered/proxy/util/EncryptionUtilsTest.java

@@ -9,18 +9,18 @@ import static org.junit.jupiter.api.Assertions.assertEquals;
 
 class EncryptionUtilsTest {
     @Test
-    void twosComplementSha1Digest() throws Exception {
+    void twosComplementHexdigest() throws Exception {
-        String notchHash = hexDigest("Notch");
+        String notchHash = mojangLoginSha1("Notch");
         assertEquals("4ed1f46bbe04bc756bcb17c0c7ce3e4632f06a48", notchHash);
 
-        String jebHash = hexDigest("jeb_");
+        String jebHash = mojangLoginSha1("jeb_");
         assertEquals("-7c9d5b0044c130109a5d7b5fb5c317c02b4e28c1", jebHash);
     }
 
-    private String hexDigest(String str) throws Exception {
+    private String mojangLoginSha1(String str) throws Exception {
         MessageDigest digest = MessageDigest.getInstance("SHA-1");
         digest.update(str.getBytes(StandardCharsets.UTF_8));
         byte[] digested = digest.digest();
-        return EncryptionUtils.twosComplementSha1Digest(digested);
+        return EncryptionUtils.twosComplementHexdigest(digested);
     }
 }