Tyler
93 lines
2.8 KiB
JavaScript
93 lines
2.8 KiB
JavaScript
// fileops.js
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import { encryptAdvanced, decryptAdvanced } from './encryption.js';
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/**
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* Encrypts the selected file and triggers download of the encrypted version.
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* @param {HTMLInputElement} fileInput - The input element of type 'file'.
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* @param {string} password - Password for encryption.
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*/
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export function encryptFile(fileInput, password) {
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if (!fileInput.files.length) {
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alert("Please select a file!");
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return;
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}
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const file = fileInput.files[0];
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const reader = new FileReader();
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reader.onload = async (e) => {
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const rawBytes = new Uint8Array(e.target.result);
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const base64 = btoa(String.fromCharCode(...rawBytes));
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const encrypted = await encryptAdvanced(base64, password);
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downloadFile(encrypted, file.name + ".enc");
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};
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reader.readAsArrayBuffer(file);
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}
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/**
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* Decrypts the selected encrypted file and triggers download of the original.
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* @param {HTMLInputElement} fileInput - The input element of type 'file'.
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* @param {string} password - Password for decryption.
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*/
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export function decryptFile(fileInput, password) {
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if (!fileInput.files.length) {
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alert("Please select a file!");
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return;
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}
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const file = fileInput.files[0];
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const reader = new FileReader();
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reader.onload = async (e) => {
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try {
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const encryptedText = e.target.result;
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const base64Decrypted = await decryptAdvanced(encryptedText, password);
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const byteArray = new Uint8Array(
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[...atob(base64Decrypted)].map(c => c.charCodeAt(0))
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);
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downloadFileBinary(byteArray, file.name.replace(/\.enc$/, ''));
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} catch (err) {
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console.error("[Decryption Error]", err);
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alert("Decryption failed: wrong password or corrupted file.");
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}
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};
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reader.readAsText(file);
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}
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/**
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* Downloads a text-based file (encrypted string).
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* @param {string} content - The file content to download.
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* @param {string} filename - Desired name for the downloaded file.
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*/
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function downloadFile(content, filename) {
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const blob = new Blob([content], { type: "application/octet-stream" });
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const url = URL.createObjectURL(blob);
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const a = document.createElement("a");
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a.href = url;
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a.download = filename;
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a.click();
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URL.revokeObjectURL(url);
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}
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/**
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* Downloads a binary file (Uint8Array).
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* @param {Uint8Array} byteArray - The binary content.
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* @param {string} filename - Desired name for the downloaded file.
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*/
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function downloadFileBinary(byteArray, filename) {
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const blob = new Blob([byteArray], { type: "application/octet-stream" });
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const url = URL.createObjectURL(blob);
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const a = document.createElement("a");
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a.href = url;
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a.download = filename;
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a.click();
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URL.revokeObjectURL(url);
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}
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