Add key id to sym keys

snowblossomcoin · Aug 20, 2020 · f1bc54c · f1bc54c
1 parent f39f6c1
commit f1bc54c
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diff --git a/lib/src/CipherUtil.java b/lib/src/CipherUtil.java
@@ -95,6 +95,14 @@ public static SymmetricKey generageSymmetricKey()
     byte[] key_data = new byte[SYM_BLOCK_SIZE_0];
     rnd.nextBytes(key_data);
     key.setKey( ByteString.copyFrom(key_data) );
+
+    // Probably overly paranoid, but as the key_id will be shared
+    // using a new low security rnd to not give away any state information
+    // from the secure rnd
+    Random rnd_low = new Random();
+    byte[] key_id_data = new byte[8];
+    rnd_low.nextBytes(key_id_data);
+    key.setKeyId( HexUtil.getHexString( key_id_data ) );
     return key.build(); 
 
   }

diff --git a/protolib/util.proto b/protolib/util.proto
@@ -72,5 +72,6 @@ message SymmetricKey {
   // See snowblossom.lib.CipherUtil
   int32 algo_set = 1; 
   bytes key = 2;
+  string key_id = 3; // Randomly generated key id
 }