Digest.toLong()

salesforce · Nov 27, 2023 · 8569ef5 · 8569ef5
1 parent 4a10f0e
commit 8569ef5
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Showing 2 changed files with 15 additions and 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
@@ -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
@@ -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);
         };
     }