From 8569ef57ce56c1eb3d1ceaf8eaca53651d27110a Mon Sep 17 00:00:00 2001
From: Hellblazer <hellblazer@me.com>
Date: Sun, 26 Nov 2023 17:47:20 -0800
Subject: [PATCH] Digest.toLong()

---
 .../com/salesforce/apollo/cryptography/Digest.java  |  4 ++++
 .../apollo/cryptography/DigestAlgorithm.java        | 13 +++++++++++--
 2 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/cryptography/src/main/java/com/salesforce/apollo/cryptography/Digest.java b/cryptography/src/main/java/com/salesforce/apollo/cryptography/Digest.java
index dad1c34b2..3bc5c7a37 100644
--- a/cryptography/src/main/java/com/salesforce/apollo/cryptography/Digest.java
+++ b/cryptography/src/main/java/com/salesforce/apollo/cryptography/Digest.java
@@ -285,6 +285,10 @@ public Digeste toDigeste() {
         return builder.build();
     }
 
+    public long toLong() {
+        return algorithm.toLong(hash);
+    }
+
     @Override
     public String toString() {
         String hexString = Hex.hex(getBytes());
diff --git a/cryptography/src/main/java/com/salesforce/apollo/cryptography/DigestAlgorithm.java b/cryptography/src/main/java/com/salesforce/apollo/cryptography/DigestAlgorithm.java
index bfece121a..e06fa97d7 100644
--- a/cryptography/src/main/java/com/salesforce/apollo/cryptography/DigestAlgorithm.java
+++ b/cryptography/src/main/java/com/salesforce/apollo/cryptography/DigestAlgorithm.java
@@ -440,11 +440,20 @@ public Digest random(Random random) {
         return new Digest(digestCode(), hash);
     }
 
+    public long toLong(long[] hash) {
+        assert hash != null;
+        long l = 0;
+        for (var h : hash) {
+            l ^= h;
+        }
+        return l;
+    }
+
     public UUID toUUID(long[] hash) {
         assert hash != null;
         return switch (hash.length) {
-            case 4 -> new UUID(hash[0] ^ hash[2], hash[1] ^ hash[3]);
-            case 8 -> toUUID(new long[] { hash[0] ^ hash[2], hash[1] ^ hash[3], hash[4] ^ hash[6], hash[5] ^ hash[7] });
+            case 4 -> new UUID(hash[0] ^ hash[1], hash[2] ^ hash[3]);
+            case 8 -> toUUID(new long[] { hash[0] ^ hash[1], hash[2] ^ hash[3], hash[4] ^ hash[5], hash[6] ^ hash[7] });
             default -> throw new IllegalArgumentException("invalid hash array size: " + hash.length);
         };
     }