Implement statistics

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

1 files changed, 19 insertions, 0 deletions

diff --git a/app/src/main/java/com/wireguard/crypto/Key.java b/app/src/main/java/com/wireguard/crypto/Key.java
index f743ddd2..6648a5f3 100644
--- a/app/src/main/java/com/wireguard/crypto/Key.java
+++ b/app/src/main/java/com/wireguard/crypto/Key.java
@@ -7,6 +7,7 @@ package com.wireguard.crypto;
 
 import com.wireguard.crypto.KeyFormatException.Type;
 
+import java.security.MessageDigest;
 import java.security.SecureRandom;
 import java.util.Arrays;
 
@@ -247,6 +248,24 @@ public final class Key {
         return new String(output);
     }
 
+    @Override
+    public int hashCode() {
+        int ret = 0;
+        for (int i = 0; i < key.length / 4; ++i)
+            ret ^= (key[i * 4 + 0] >> 0) + (key[i * 4 + 1] >> 8) + (key[i * 4 + 2] >> 16) + (key[i * 4 + 3] >> 24);
+        return ret;
+    }
+
+    @Override
+    public boolean equals(final Object obj) {
+        if (obj == this)
+            return true;
+        if (obj == null || obj.getClass() != getClass())
+            return false;
+        final Key other = (Key) obj;
+        return MessageDigest.isEqual(key, other.key);
+    }
+
     /**
      * The supported formats for encoding a WireGuard key.
      */