Initial from bip32.github.io

2024-08-21 09:55:33 +02:00
commit 73bc8bbfea
26 changed files with 5011 additions and 0 deletions
--- a/js/hash_worker.js
+++ b/js/hash_worker.js
@@ -0,0 +1,66 @@
+importScripts("crypto-min.js");
+importScripts("sha256.js");
+
+(function() {
+    var state = 'stopped';
+    var bip32_source_passphrase = null;
+    var last = null;
+    var index = 0;
+    var COUNT = 50000;
+    var STEP  = 500;
+    
+    function message_handler(e) {
+        var m = e.data;
+    
+        switch (m.cmd) {
+        case 'start':
+            last = Crypto.util.hexToBytes("0000000000000000000000000000000000000000000000000000000000000000"); // 256-bit 0
+            bip32_source_passphrase = m.bip32_source_passphrase;
+            state = 'start';
+            break;
+        case 'stop':
+            state = 'stopped';
+            break;
+        default:
+            break;
+        };
+    }
+    
+    self.addEventListener('message', message_handler, false);
+    
+    function main() {
+        var loop = 0;
+        for(var loop = 0; loop < 100; loop++) {
+            switch(state) {
+            case 'stopped':
+                setTimeout(main, 1000);
+                return;
+            case 'start':
+                self.postMessage({'cmd': 'progress', 'progress': 0});
+                index = 0;
+                state = 'hashing';
+                // fall through
+            case 'hashing':
+                var hasher = new jsSHA(Crypto.util.bytesToHex(last), 'HEX');   
+                last = Crypto.util.hexToBytes(hasher.getHMAC(bip32_source_passphrase, "TEXT", "SHA-256", "HEX"));
+                index += 1;
+
+                if( index >= COUNT ) {
+                    self.postMessage({'cmd': 'done', 'result': Crypto.util.bytesToHex(last)});
+                    state = 'stopped';
+                } else if( (index % STEP) == 0 ) {
+                    self.postMessage({'cmd': 'progress', 'progress': Math.floor((100 * index / COUNT) + 0.5)});
+                }
+                break;
+            default:
+                break;
+            }
+        }
+
+        // we use this style of run-some, wait-some to allow the browser to parse messages,
+        // allowing us to restart/stop mid-hash
+        setTimeout(main, 0);
+    }
+    
+    main();
+})();