96 lines
No EOL
2.7 KiB
JavaScript
96 lines
No EOL
2.7 KiB
JavaScript
function download() {
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var xhr = new XMLHttpRequest();
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xhr.open("get", "/assets" + location.pathname.slice(0, -1), true);
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xhr.responseType = "blob";
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xhr.addEventListener("progress", updateProgress);
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xhr.onload = function(e) {
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if (this.status == 200) {
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let self = this;
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var blob = new Blob([this.response]);
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var arrayBuffer;
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var fileReader = new FileReader();
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fileReader.onload = function() {
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arrayBuffer = this.result;
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var array = new Uint8Array(arrayBuffer);
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salt = strToIv(location.pathname.slice(10, -1));
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window.crypto.subtle.importKey(
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"jwk",
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{
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kty: "oct",
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k: location.hash.slice(1),
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alg: "A128CBC",
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ext: true,
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},
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{
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name: "AES-CBC",
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},
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true,
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["encrypt", "decrypt"])
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.then(function(key){
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window.crypto.subtle.decrypt(
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{
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name: "AES-CBC",
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iv: salt,
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},
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key,
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array)
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.then(function(decrypted){
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var dataView = new DataView(decrypted);
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var blob = new Blob([dataView]);
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var downloadUrl = URL.createObjectURL(blob);
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var a = document.createElement("a");
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a.href = downloadUrl;
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a.download = xhr.getResponseHeader("Content-Disposition").match(/filename="(.+)"/)[1];
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console.log(xhr.getResponseHeader("Content-Disposition"));
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document.body.appendChild(a);
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a.click();
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})
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.catch(function(err){
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alert("This link is either invalid or has expired, or the uploader has deleted the file.");
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console.error(err);
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});
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})
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.catch(function(err){
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console.error(err);
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});
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};
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fileReader.readAsArrayBuffer(blob);
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} else {
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alert("This link is either invalid or has expired, or the uploader has deleted the file.")
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}
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};
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xhr.send();
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}
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function ivToStr(iv) {
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let hexStr = "";
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for (var i in iv) {
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if (iv[i] < 16) {
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hexStr += "0" + iv[i].toString(16);
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} else {
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hexStr += iv[i].toString(16);
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}
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}
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window.hexStr = hexStr;
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return hexStr;
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}
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function strToIv(str) {
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var iv = new Uint8Array(16);
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for (var i = 0; i < str.length; i += 2) {
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iv[i/2] = parseInt((str.charAt(i) + str.charAt(i + 1)), 16);
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}
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return iv;
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}
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function updateProgress(e) {
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if (e.lengthComputable) {
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var percentComplete = Math.floor((e.loaded / e.total) * 100);
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document.getElementById("downloadProgress").innerHTML = "Progress: " + percentComplete + "%";
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}
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} |