67 lines
2.1 KiB
JavaScript
67 lines
2.1 KiB
JavaScript
importScripts("crypto-min.js");
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importScripts("sha256.js");
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(function() {
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var state = 'stopped';
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var bip32_source_passphrase = null;
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var last = null;
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var index = 0;
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var COUNT = 50000;
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var STEP = 500;
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function message_handler(e) {
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var m = e.data;
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switch (m.cmd) {
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case 'start':
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last = Crypto.util.hexToBytes("0000000000000000000000000000000000000000000000000000000000000000"); // 256-bit 0
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bip32_source_passphrase = m.bip32_source_passphrase;
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state = 'start';
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break;
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case 'stop':
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state = 'stopped';
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break;
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default:
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break;
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};
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}
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self.addEventListener('message', message_handler, false);
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function main() {
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var loop = 0;
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for(var loop = 0; loop < 100; loop++) {
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switch(state) {
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case 'stopped':
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setTimeout(main, 1000);
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return;
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case 'start':
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self.postMessage({'cmd': 'progress', 'progress': 0});
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index = 0;
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state = 'hashing';
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// fall through
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case 'hashing':
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var hasher = new jsSHA(Crypto.util.bytesToHex(last), 'HEX');
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last = Crypto.util.hexToBytes(hasher.getHMAC(bip32_source_passphrase, "TEXT", "SHA-256", "HEX"));
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index += 1;
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if( index >= COUNT ) {
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self.postMessage({'cmd': 'done', 'result': Crypto.util.bytesToHex(last)});
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state = 'stopped';
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} else if( (index % STEP) == 0 ) {
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self.postMessage({'cmd': 'progress', 'progress': Math.floor((100 * index / COUNT) + 0.5)});
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}
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break;
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default:
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break;
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}
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}
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// we use this style of run-some, wait-some to allow the browser to parse messages,
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// allowing us to restart/stop mid-hash
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setTimeout(main, 0);
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}
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main();
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})();
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