127 lines
4.2 KiB
Rust
127 lines
4.2 KiB
Rust
// OmegaUpload Web Frontend
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// Copyright (C) 2021 Edward Shen
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <https://www.gnu.org/licenses/>.
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use std::io::Cursor;
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use std::sync::Arc;
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use gloo_console::log;
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use js_sys::{Array, Uint8Array};
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use omegaupload_common::crypto::{open_in_place, Error, Key};
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use omegaupload_common::secrecy::{Secret, SecretVec};
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use serde::Serialize;
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use wasm_bindgen::JsCast;
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use web_sys::{Blob, BlobPropertyBag};
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#[derive(Clone, Serialize)]
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pub struct ArchiveMeta {
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name: String,
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file_size: u64,
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}
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#[derive(Clone)]
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pub enum DecryptedData {
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String(Arc<String>),
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Blob(Arc<Blob>),
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Image(Arc<Blob>, usize),
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Audio(Arc<Blob>),
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Video(Arc<Blob>),
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Archive(Arc<Blob>, Vec<ArchiveMeta>),
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}
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fn now() -> f64 {
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web_sys::window()
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.expect("should have a Window")
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.performance()
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.expect("should have a Performance")
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.now()
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}
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pub fn decrypt(
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mut container: Vec<u8>,
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key: &Secret<Key>,
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maybe_password: Option<SecretVec<u8>>,
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) -> Result<DecryptedData, Error> {
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open_in_place(&mut container, key, maybe_password)?;
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let mime_type = tree_magic_mini::from_u8(&container);
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log!("Mimetype: ", mime_type);
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log!("Blob conversion started.");
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let start = now();
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let blob_chunks = Array::new_with_length(container.chunks(65536).len().try_into().unwrap());
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for (i, chunk) in container.chunks(65536).enumerate() {
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let array = Uint8Array::new_with_length(chunk.len().try_into().unwrap());
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array.copy_from(chunk);
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blob_chunks.set(i.try_into().unwrap(), array.dyn_into().unwrap());
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}
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let mut blob_props = BlobPropertyBag::new();
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blob_props.type_(mime_type);
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let blob = Arc::new(
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Blob::new_with_u8_array_sequence_and_options(blob_chunks.dyn_ref().unwrap(), &blob_props)
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.unwrap(),
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);
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log!(format!("Blob conversion completed in {}ms", now() - start));
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if mime_type.starts_with("text/") {
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if let Ok(string) = String::from_utf8(container) {
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Ok(DecryptedData::String(Arc::new(string)))
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} else {
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Ok(DecryptedData::Blob(blob))
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}
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} else if mime_type.starts_with("image/")
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// application/x-riff is WebP
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|| mime_type == "application/x-riff"
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{
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Ok(DecryptedData::Image(blob, container.len()))
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} else if mime_type.starts_with("audio/") {
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Ok(DecryptedData::Audio(blob))
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} else if mime_type.starts_with("video/")
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// application/x-matroska is mkv
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|| mime_type == "application/x-matroska"
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{
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Ok(DecryptedData::Video(blob))
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} else if mime_type == "application/zip" {
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let mut entries = vec![];
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let cursor = Cursor::new(container);
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if let Ok(mut zip) = zip::ZipArchive::new(cursor) {
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for i in 0..zip.len() {
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match zip.by_index(i) {
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Ok(file) => entries.push(ArchiveMeta {
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name: file.name().to_string(),
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file_size: file.size(),
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}),
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Err(err) => match err {
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zip::result::ZipError::UnsupportedArchive(s) => {
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log!("Unsupported: ", s.to_string());
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}
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_ => {
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log!(format!("Error: {}", err));
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}
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},
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}
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}
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}
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entries.sort_by(|a, b| a.name.cmp(&b.name));
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Ok(DecryptedData::Archive(blob, entries))
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} else if mime_type == "application/gzip" {
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Ok(DecryptedData::Archive(blob, vec![]))
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} else {
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Ok(DecryptedData::Blob(blob))
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}
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}
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