Use HMAC SHA-256 with configurable amount of rounds to generate seed for HD wallet, also show the generated seed in WIF format.

index.html

@@ -582,12 +582,27 @@
 							</span>
 						</div>
 
+						<label>Seed (WIF)</label>
+						<div class="input-group">
+							<input id="newHDseed" type="text" class="form-control" value="" readonly>
+							<span class="input-group-btn">
+								<button class="deriveHDbtn btn btn-default" type="button"><span title="Derive from key" class="glyphicon glyphicon-chevron-right"></span></button>
+							</span>
+						</div>
+
 						<h3>Address Options</h3>
 						<p>You can use the advanced options below to generate different kinds of master addresses.</p>
 						
 						<div class="checkbox">
 							<label><input type="checkbox" id="newHDBrainwallet" class="checkbox-inline"> Custom Seed or Brain Wallet</label>
-							<input type="text" class="form-control hidden" id="HDBrainwallet">
+							<div class="hidden" id="HDBrainwalletInput">
+								<input type="text" class="form-control" id="HDBrainwallet">
+								<span class="text-muted">
+									Number of HMAC SHA-256 iterations for seed generation, higher value mean's also longer calculation
+									(use value 0 to calculate just SHA-256, like in previous coinb.in versions):
+									<input type="text" class="form-control" id="HDBrainwalletIters" value="50000" size="10">
+								</span>
+							</div>
 						</div>
 
 						<input type="button" class="btn btn-primary" value="Generate" id="newHDKeysBtn">
@@ -597,7 +612,7 @@
 						<h2>Transaction <small>Create a new transaction</small></h2>
 						<p>Use this page to create a raw transaction</p>
 
-						<b>Address, WIF key or Redeem Script</b>:
+						<b>Address, WIF key, Redeem Script or Transaction ID</b>:
 						<div class="input-group">
 							<span class="input-group-btn">
 								<button class="btn btn-info qrcodeScanner" type="button" data-toggle="modal" data-target="#modalQrcodeScanner" forward-result="#redeemFrom"><span class="glyphicon glyphicon-camera"></span></button>

js/coin.js

@@ -608,6 +608,7 @@
 				r.parent_fingerprint = bytes.slice(5, 9);
 				r.child_index = coinjs.uint(bytes.slice(9, 13), 4);
  				r.chain_code = bytes.slice(13, 45);
+				r.seed_wif = '';
 				r.key_bytes = bytes.slice(45, 78);
 
 				var c = coinjs.compressed; // get current default
@@ -742,8 +743,23 @@
 		}
 
 		// make a master hd xprv/xpub
-		r.master = function(pass) {
-			var seed = (pass) ? Crypto.SHA256(pass) : coinjs.newPrivkey();
+		r.master = function(pass, iters) {
+			if (pass) {
+				var seed_iters = (iters) ? Math.abs(iters * 1) : 0;
+				if (seed_iters == 0) {
+					var seed = Crypto.SHA256(pass);
+				} else {
+					var seed = Crypto.util.hexToBytes("0000000000000000000000000000000000000000000000000000000000000000");
+					for (var i = 0; i < seed_iters; i++) {
+						seed = Crypto.HMAC(Crypto.SHA256, seed, pass, { asBytes: true });
+					}
+					seed = Crypto.util.bytesToHex(seed);
+				}
+			} else {
+				var seed = coinjs.newPrivkey();
+			}
+
+			var seed_wif = coinjs.privkey2wif(seed);
 			var hasher = new jsSHA(seed, 'HEX');
 			var I = hasher.getHMAC("Bitcoin seed", "TEXT", "SHA-512", "HEX");
 
@@ -755,6 +771,7 @@
 				'parent_fingerprint':[0,0,0,0],
 				'child_index':0,
 				'chain_code':chain,
+				'seed_wif':seed_wif,
 				'privkey':I.slice(0, 64),
 				'pubkey':coinjs.newPubkey(I.slice(0, 64))});
 		}
@@ -799,6 +816,8 @@
 				var ret = pub.concat(checksum);
 				o.pubkey = coinjs.base58encode(ret);
 			}
+
+			o.seed_wif = data.seed_wif;
 			return o;
 		}
 
@@ -1092,32 +1111,37 @@
 
 				var unspent = xmlDoc.getElementsByTagName("unspent")[0];
 
-				for(i=1;i<=unspent.childElementCount;i++){
-					var u = xmlDoc.getElementsByTagName("unspent_"+i)[0]
-					var txhash = (u.getElementsByTagName("tx_hash")[0].childNodes[0].nodeValue).match(/.{1,2}/g).reverse().join("")+'';
-					var n = u.getElementsByTagName("tx_output_n")[0].childNodes[0].nodeValue;
-					var scr = script || u.getElementsByTagName("script")[0].childNodes[0].nodeValue;
+				if(unspent){ 
+					for(i=1;i<=unspent.childElementCount;i++){
+						var u = xmlDoc.getElementsByTagName("unspent_"+i)[0]
+						var txhash = (u.getElementsByTagName("tx_hash")[0].childNodes[0].nodeValue).match(/.{1,2}/g).reverse().join("")+'';
+						var n = u.getElementsByTagName("tx_output_n")[0].childNodes[0].nodeValue;
+						var scr = script || u.getElementsByTagName("script")[0].childNodes[0].nodeValue;
 
-					if(segwit){
-						/* this is a small hack to include the value with the redeemscript to make the signing procedure smoother. 
-						It is not standard and removed during the signing procedure. */
+						if(segwit){
+							/* this is a small hack to include the value with the redeemscript to make the signing procedure smoother. 
+							It is not standard and removed during the signing procedure. */
 
-						s = coinjs.script();
-						s.writeBytes(Crypto.util.hexToBytes(script));
-						s.writeOp(0);
-						s.writeBytes(coinjs.numToBytes(u.getElementsByTagName("value")[0].childNodes[0].nodeValue*1, 8));
-						scr = Crypto.util.bytesToHex(s.buffer);
+							s = coinjs.script();
+							s.writeBytes(Crypto.util.hexToBytes(script));
+							s.writeOp(0);
+							s.writeBytes(coinjs.numToBytes(u.getElementsByTagName("value")[0].childNodes[0].nodeValue*1, 8));
+							scr = Crypto.util.bytesToHex(s.buffer);
+						}
+
+						var seq = sequence || false;
+						self.addinput(txhash, n, scr, seq);
+						value += u.getElementsByTagName("value")[0].childNodes[0].nodeValue*1;
+						total++;
 					}
-
-					var seq = sequence || false;
-					self.addinput(txhash, n, scr, seq);
-					value += u.getElementsByTagName("value")[0].childNodes[0].nodeValue*1;
-					total++;
 				}
 
-				x.unspent = $(xmlDoc).find("unspent");
+				x.result = xmlDoc.getElementsByTagName("result")[0].childNodes[0].nodeValue;
+				x.unspent = unspent;
 				x.value = value;
 				x.total = total;
+				x.response = xmlDoc.getElementsByTagName("response")[0].childNodes[0].nodeValue;
+
 				return callback(x);
 			});
 		}

js/coinbin.js

@@ -570,18 +570,20 @@ $(document).ready(function() {
 	$("#newHDKeysBtn").click(function(){
 		coinjs.compressed = true;
 		var s = ($("#newHDBrainwallet").is(":checked")) ? $("#HDBrainwallet").val() : null;
+		var siters = ($("#newHDBrainwallet").is(":checked")) ? $("#HDBrainwalletIters").val()*1 : null;
 		var hd = coinjs.hd();
-		var pair = hd.master(s);
+		var pair = hd.master(s, siters);
 		$("#newHDxpub").val(pair.pubkey);
 		$("#newHDxprv").val(pair.privkey);
+		$("#newHDseed").val(pair.seed_wif);
 
 	});
 
 	$("#newHDBrainwallet").click(function(){
 		if($(this).is(":checked")){
-			$("#HDBrainwallet").removeClass("hidden");
+			$("#HDBrainwalletInput").removeClass("hidden");
 		} else {
-			$("#HDBrainwallet").addClass("hidden");
+			$("#HDBrainwalletInput").addClass("hidden");
 		}
 	});
 
@@ -1076,9 +1078,7 @@ $(document).ready(function() {
 					var n = $(o).find("output_no").text();
 					var amount = (($(o).find("value").text()*1)).toFixed(8);
 
-					var script = coinjs.script();
-					var s = script.spendToScript($(o).find("address").text());
-					var scr = Crypto.util.bytesToHex(s.buffer);
+					var scr = $(o).find("script").text();
 
 					addOutput(tx, n, scr, amount);
 
@@ -1683,6 +1683,7 @@ $(document).ready(function() {
 			if(hex == hex_cmp_prv || hex == hex_cmp_pub){
 				var hd = coinjs.hd(s);
 				$("#verifyHDaddress .hdKey").html(s);
+				$("#verifyHDaddress .seed_wif").val(hd.seed_wif);
 				$("#verifyHDaddress .chain_code").val(Crypto.util.bytesToHex(hd.chain_code));
 				$("#verifyHDaddress .depth").val(hd.depth);
 				$("#verifyHDaddress .version").val('0x'+(hd.version).toString(16));

sha1sum

@@ -1,9 +1,9 @@
----- Version 1.6 2020.07.06 ----
+---- Version 1.6 2020.10.02 ----
 77e4519962e2f6a9fc93342137dbb31c33b76b04  ./js/aes.js
 3a09a8fc0cfe828b57fc798d668234d0490ee1a6  ./js/bootstrap-datetimepicker.min.js
 253711c6d825de55a8360552573be950da180614  ./js/bootstrap.min.js
-7dd75e07389808d57261bca630a5bab55ce9faef  ./js/coinbin.js
-228cdcf29d33a5eadd360e85a6220e4853ee4590  ./js/coin.js
+cb5717166bf1c99abbd75a06013067c4a5897d5a  ./js/coinbin.js
+911fb7bdba24269029f27659e4040cd991b2307c  ./js/coin.js
 988565bc2cb402d63ed5c5fd7ff47c4278efc2c5  ./js/collapse.js
 9ba5ede3d7f9d4c8fd623395f196adfdcf7e970f  ./js/crypto-min.js
 f7c09f2f5a721371e7d478050119f7e2d58e3ef9  ./js/crypto-sha256-hmac.js
@@ -31,5 +31,5 @@ de51a8494180a6db074af2dee2383f0a363c5b08  ./fonts/glyphicons-halflings-regular.s
 278e49a86e634da6f2a02f3b47dd9d2a8f26210f  ./fonts/glyphicons-halflings-regular.woff
 44bc1850f570972267b169ae18f1cb06b611ffa2  ./fonts/glyphicons-halflings-regular.ttf
 ee481606d8d48f402d152fa632ba9e5f9da7f169  ./README.md
-5054e03cff2cfcd1ce5296fe2659ca2d46d64fe4  ./index.html
+a706e95f6436ee4a31dc26b17a9ac8ab1f0d3750  ./index.html
 7130b64e3ef4cf6f2f1550e902f081c58dc053de  ./test.html