lapo.it
JavaScript generic ASN.1 parser (mirror)
Use Base64 in URL, instead of longer hex. Move example data to a button, so that by default it is clean to paste. Avoid JavaScript in HTML, activate it from existing script.
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+4
-19
index.html
+4
-19
index.html
···
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<div id="tree"></div>
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</div>
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<form>
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<textarea id="area" style="width: 100%;" rows="8">
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MIAGCSqGSIb3DQEHAqCAMIACAQExCzAJBgUrDgMCGgUAMIAGCSqGSIb3DQEHAQAAoIAwggHvMIIB
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WKADAgECAhAvoXazbunwSfREtACZZhlFMA0GCSqGSIb3DQEBBQUAMAwxCjAIBgNVBAMMAWEwHhcN
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MDgxMDE1MTUwMzQxWhcNMDkxMDE1MTUwMzQxWjAMMQowCAYDVQQDDAFhMIGfMA0GCSqGSIb3DQEB
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AQUAA4GNADCBiQKBgQCJUwlwhu5hR8X01f+vG0mKPRHsVRjpZNxSEmsmFPdDiD9kylE3ertTDf0g
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RkpIvWfNJ+eymuxoXF0Qgl5gXAVuSrjupGD6J+VapixJiwLXJHokmDihLs3zfGARz08O3qnO5ofB
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-
y0pRxq5isu/bAAcjoByZ1sI/g0iAuotC1UFObwIDAQABo1IwUDAOBgNVHQ8BAf8EBAMCBPAwHQYD
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VR0OBBYEFEIGXQB4h+04Z3y/n7Nv94+CqPitMB8GA1UdIwQYMBaAFEIGXQB4h+04Z3y/n7Nv94+C
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qPitMA0GCSqGSIb3DQEBBQUAA4GBAE0G7tAiaacJxvP3fhEj+yP9VDxL0omrRRAEaMXwWaBf/Ggk
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1T/u+8/CDAdjuGNCiF6ctooKc8u8KpnZJsGqnpGQ4n6L2KjTtRUDh+hija0eJRBFdirPQe2HAebQ
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GFnmOk6Mn7KiQfBIsOzXim/bFqaBSbf06bLTQNwFouSO+jwOAAAxggElMIIBIQIBATAgMAwxCjAI
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BgNVBAMMAWECEC+hdrNu6fBJ9ES0AJlmGUUwCQYFKw4DAhoFAKBdMBgGCSqGSIb3DQEJAzELBgkq
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hkiG9w0BBwEwHAYJKoZIhvcNAQkFMQ8XDTA4MTAxNTE1MDM0M1owIwYJKoZIhvcNAQkEMRYEFAAA
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AAAAAAAAAAAAAAAAAAAAAAAAMA0GCSqGSIb3DQEBAQUABIGAdB7ShyMGf5lVdZtvwKlnYLHMUqJW
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uBnFk7aQwHAmg3JnH6OcgId2F+xfg6twXm8hhUBkhHPlHGoWa5kQtN9n8rz3NorzvcM/1Xv9+0Ea
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l7NYSn2Hb0C0DMj2XNIYH2C6CLIHkmy1egzUvzsomZPTkx5nGDWm+8WHCjWb9A6lyrMAAAAAAAA=
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</textarea>
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<textarea id="area" style="width: 100%;" rows="8"></textarea>
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<br>
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<label title="can be slow with big files"><input type="checkbox" id="wantHex" checked="checked"> with hex dump</label>
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<input type="button" value="decode" onclick="decodeArea();">
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<input type="button" value="clear" onclick="clearAll();">
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<input id="butDecode" type="button" value="decode">
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<input id="butClear" type="button" value="clear">
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<input id="butExample" type="button" value="example">
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<input type="file" id="file">
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</form>
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<div id="help">
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-11
index.js
+16
-11
index.js
···
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tree.appendChild(asn1.toDOM());
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if (wantHex.checked)
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dump.appendChild(asn1.toHexDOM());
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var hex = (der.length < maxLength) ? asn1.toHexString() : '';
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if (area.value === '')
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area.value = hex;
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var b64 = (der.length < maxLength) ? asn1.toB64String() : '';
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if (area.value === '')
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area.value = Base64.pretty(b64);
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try {
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window.location.hash = hash = '#' + hex;
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window.location.hash = hash = '#' + b64;
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} catch (e) { // fails with "Access Denied" on IE with URLs longer than ~2048 chars
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window.location.hash = hash = '#';
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}
···
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text(tree, e);
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}
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}
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function decodeArea() {
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function decodeText(val) {
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try {
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var val = area.value,
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der = reHex.test(val) ? Hex.decode(val) : Base64.unarmor(val);
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var der = reHex.test(val) ? Hex.decode(val) : Base64.unarmor(val);
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decode(der);
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} catch (e) {
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text(tree, e);
···
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dump.innerHTML = '';
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}
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}
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function clearAll() {
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// set up buttons
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id('butDecode').onclick = function () { decodeText(area.value); };
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id('butClear').onclick = function () {
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area.value = '';
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tree.innerHTML = '';
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dump.innerHTML = '';
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hash = window.location.hash = '';
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}
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id('butExample').onclick = function () {
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var demo = 'MIAGCSqGSIb3DQEHAqCAMIACAQExCzAJBgUrDgMCGgUAMIAGCSqGSIb3DQEHAQAAoIAwggHvMIIBWKADAgECAhAvoXazbunwSfREtACZZhlFMA0GCSqGSIb3DQEBBQUAMAwxCjAIBgNVBAMMAWEwHhcNMDgxMDE1MTUwMzQxWhcNMDkxMDE1MTUwMzQxWjAMMQowCAYDVQQDDAFhMIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCJUwlwhu5hR8X01f-vG0mKPRHsVRjpZNxSEmsmFPdDiD9kylE3ertTDf0gRkpIvWfNJ-eymuxoXF0Qgl5gXAVuSrjupGD6J-VapixJiwLXJHokmDihLs3zfGARz08O3qnO5ofBy0pRxq5isu_bAAcjoByZ1sI_g0iAuotC1UFObwIDAQABo1IwUDAOBgNVHQ8BAf8EBAMCBPAwHQYDVR0OBBYEFEIGXQB4h-04Z3y_n7Nv94-CqPitMB8GA1UdIwQYMBaAFEIGXQB4h-04Z3y_n7Nv94-CqPitMA0GCSqGSIb3DQEBBQUAA4GBAE0G7tAiaacJxvP3fhEj-yP9VDxL0omrRRAEaMXwWaBf_Ggk1T_u-8_CDAdjuGNCiF6ctooKc8u8KpnZJsGqnpGQ4n6L2KjTtRUDh-hija0eJRBFdirPQe2HAebQGFnmOk6Mn7KiQfBIsOzXim_bFqaBSbf06bLTQNwFouSO-jwOAAAxggElMIIBIQIBATAgMAwxCjAIBgNVBAMMAWECEC-hdrNu6fBJ9ES0AJlmGUUwCQYFKw4DAhoFAKBdMBgGCSqGSIb3DQEJAzELBgkqhkiG9w0BBwEwHAYJKoZIhvcNAQkFMQ8XDTA4MTAxNTE1MDM0M1owIwYJKoZIhvcNAQkEMRYEFAAAAAAAAAAAAAAAAAAAAAAAAAAAMA0GCSqGSIb3DQEBAQUABIGAdB7ShyMGf5lVdZtvwKlnYLHMUqJWuBnFk7aQwHAmg3JnH6OcgId2F-xfg6twXm8hhUBkhHPlHGoWa5kQtN9n8rz3NorzvcM_1Xv9-0Eal7NYSn2Hb0C0DMj2XNIYH2C6CLIHkmy1egzUvzsomZPTkx5nGDWm-8WHCjWb9A6lyrMAAAAAAAA';
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decodeText(demo);
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};
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// this is only used if window.FileReader
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function read(f) {
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area.value = ''; // clear text area, will get hex content
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area.value = ''; // clear text area, will get b64 content
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var r = new FileReader();
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r.onloadend = function () {
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if (r.error)
···
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// Firefox is not consistent with other browsers and return an
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// already-decoded hash string so we risk double-decoding here,
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// but since % is not allowed in base64 nor hexadecimal, it's ok
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area.value = decodeURIComponent(hash.substr(1));
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decodeArea();
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var val = decodeURIComponent(hash.substr(1));
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decodeText(val);
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}
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}
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function stop(e) {