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fix: chunked processing (partly)

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This commit is contained in:
Samuel 2024-12-24 12:16:15 +01:00
parent a581e2326b
commit b3e3eb7270
10 changed files with 758 additions and 108 deletions
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11
Cargo.lock generated
View file

@ -77,6 +77,16 @@ dependencies = [
"inout",
]
[[package]]
name = "console_error_panic_hook"
version = "0.1.7"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "a06aeb73f470f66dcdbf7223caeebb85984942f22f1adb2a088cf9668146bbbc"
dependencies = [
"cfg-if",
"wasm-bindgen",
]
[[package]]
name = "cpufeatures"
version = "0.2.16"
@ -483,6 +493,7 @@ version = "0.1.0"
dependencies = [
"aes",
"base64",
"console_error_panic_hook",
"ctr",
"hkdf",
"hmac",

1
Cargo.toml
View file

@ -21,6 +21,7 @@ serde_json = "1.0"
prost = "0.11"
prost-types = "0.11"
serde_bytes = "0.11.15"
console_error_panic_hook = "0.1.7"
[build-dependencies]
prost-build = "0.11"

472
src/lib.rs
View file

@ -25,19 +25,27 @@ use ctr::cipher::{KeyIvInit, StreamCipher};
use ctr::Ctr32BE;
use hkdf::Hkdf;
use hmac::{Hmac, Mac};
use js_sys::Function;
use prost::Message;
use sha2::{Digest, Sha256, Sha512};
use std::collections::HashMap;
use std::io::{self, Read};
use wasm_bindgen::prelude::*;
extern crate console_error_panic_hook;
type HmacSha256 = Hmac<Sha256>;
pub mod signal {
include!(concat!(env!("OUT_DIR"), "/signal.rs"));
}
#[derive(Debug)]
enum AttachmentType {
Attachment,
Sticker,
Avatar,
}
#[wasm_bindgen]
pub struct DecryptionResult {
database_bytes: Vec<u8>,
@ -63,6 +71,7 @@ impl DecryptionResult {
}
}
// Add position field to ByteReader
struct ByteReader {
data: Vec<u8>,
position: usize,
@ -76,6 +85,32 @@ impl ByteReader {
fn remaining_data(&self) -> &[u8] {
&self.data[self.position..]
}
fn remaining_length(&self) -> usize {
self.remaining_data().len()
}
fn get_position(&self) -> usize {
self.position
}
fn set_position(&mut self, position: usize) {
self.position = position;
}
fn read_exact(&mut self, buf: &mut [u8]) -> io::Result<()> {
let available = self.remaining_data();
if available.len() < buf.len() {
return Err(io::Error::new(
io::ErrorKind::UnexpectedEof,
"unexpected end of file",
));
}
buf.copy_from_slice(&available[..buf.len()]);
self.position += buf.len();
Ok(())
}
}
impl Read for ByteReader {
@ -164,6 +199,10 @@ fn read_backup_header(reader: &mut ByteReader) -> Result<HeaderData, JsValue> {
})
}
fn io_err_to_js(e: io::Error) -> JsValue {
JsValue::from_str(&format!("IO Error: {}", e))
}
fn decrypt_frame(
reader: &mut ByteReader,
hmac_key: &[u8],
@ -172,7 +211,16 @@ fn decrypt_frame(
header_version: Option<u32>,
ciphertext_buf: &mut Vec<u8>,
plaintext_buf: &mut Vec<u8>,
) -> Result<signal::BackupFrame, JsValue> {
should_update_hmac: bool,
) -> Result<Option<signal::BackupFrame>, JsValue> {
if reader.remaining_length() < 4 {
web_sys::console::log_1(&"too less data to decrypt frame length".into());
return Ok(None); // Not enough data to read the frame length
}
let initial_position = reader.get_position();
let mut hmac = <HmacSha256 as Mac>::new_from_slice(hmac_key)
.map_err(|_| JsValue::from_str("Invalid HMAC key"))?;
@ -183,53 +231,156 @@ fn decrypt_frame(
let length = match header_version {
None => {
let mut length_bytes = [0u8; 4];
reader
.read_exact(&mut length_bytes)
.map_err(|e| JsValue::from_str(&format!("Failed to read length: {}", e)))?;
u32::from_be_bytes(length_bytes)
reader.read_exact(&mut length_bytes).map_err(io_err_to_js)?;
let len = u32::from_be_bytes(length_bytes);
len
}
Some(1) => {
let mut encrypted_length = [0u8; 4];
reader.read_exact(&mut encrypted_length).map_err(|e| {
JsValue::from_str(&format!("Failed to read encrypted length: {}", e))
})?;
Mac::update(&mut hmac, &encrypted_length);
reader
.read_exact(&mut encrypted_length)
.map_err(io_err_to_js)?;
// web_sys::console::log_1(
// &format!("encrypted length bytes: {:02x?}", encrypted_length).into(),
// );
if should_update_hmac == true {
// web_sys::console::log_1(&"updating hmac".into());
Mac::update(&mut hmac, &encrypted_length);
}
let mut decrypted_length = encrypted_length;
ctr.apply_keystream(&mut decrypted_length);
u32::from_be_bytes(decrypted_length)
// web_sys::console::log_1(
// &format!("decrypted length bytes: {:02x?}", decrypted_length).into(),
// );
let len = u32::from_be_bytes(decrypted_length);
// web_sys::console::log_1(&format!("length: {}", len).into());
len
}
Some(v) => return Err(JsValue::from_str(&format!("Unsupported version: {}", v))),
};
if length < 10 {
return Err(JsValue::from_str("Frame too short"));
if reader.remaining_length() < length as usize {
// web_sys::console::log_1(&"remaining data is too less".into());
// reset the buffer for the next iteration
reader.set_position(initial_position);
return Ok(None); // Not =enough data to read the frame
}
ciphertext_buf.clear();
ciphertext_buf.resize((length - 10) as usize, 0);
reader
.read_exact(ciphertext_buf)
.map_err(|e| JsValue::from_str(&format!("Failed to read ciphertext: {}", e)))?;
reader.read_exact(ciphertext_buf).map_err(io_err_to_js)?;
let mut their_mac = [0u8; 10];
reader
.read_exact(&mut their_mac)
.map_err(|e| JsValue::from_str(&format!("Failed to read MAC: {}", e)))?;
reader.read_exact(&mut their_mac).map_err(io_err_to_js)?;
Mac::update(&mut hmac, ciphertext_buf);
let our_mac = hmac.finalize().into_bytes();
if their_mac != our_mac[..10] {
return Err(JsValue::from_str("MAC verification failed"));
return Err(JsValue::from_str(&format!(
"MAC verification failed. Their MAC: {:02x?}, Our MAC: {:02x?}",
their_mac,
&our_mac[..10]
)));
}
plaintext_buf.clear();
plaintext_buf.extend_from_slice(ciphertext_buf);
ctr.apply_keystream(plaintext_buf);
signal::BackupFrame::decode(&plaintext_buf[..])
.map_err(|e| JsValue::from_str(&format!("Failed to decode frame: {}", e)))
// Attempt to decode the frame
let backup_frame = signal::BackupFrame::decode(&plaintext_buf[..])
.map_err(|e| JsValue::from_str(&format!("Failed to decode frame: {}", e)))?;
// web_sys::console::log_1(&format!("position: {}", reader.get_position()).into());
// if reader.remaining_length() >= 10 {
// web_sys::console::log_1(
// &format!("remaining data: {:02x?}", &reader.remaining_data()[..10]).into(),
// );
// }
Ok(Some(backup_frame))
}
// this decrypts attachments, stickers and avatars in chunks
fn decrypt_frame_payload(
reader: &mut ByteReader,
length: usize,
hmac_key: &[u8],
cipher_key: &[u8],
initialisation_vector: &[u8],
chunk_size: usize,
) -> Result<Option<Vec<u8>>, JsValue> {
if reader.remaining_length() < length {
// web_sys::console::log_1(&"too little data to decrypt attachment".into());
// web_sys::console::log_1(
// &format!(
// "payload: too little remaining data: {:02x?}",
// &reader.remaining_data()[..10]
// )
// .into(),
// );
return Ok(None);
} else {
// web_sys::console::log_1(
// &format!(
// "payload: enough remaining data: {:02x?}",
// &reader.remaining_data()[..10]
// )
// .into(),
// );
}
let mut hmac = <HmacSha256 as Mac>::new_from_slice(hmac_key)
.map_err(|_| JsValue::from_str("Invalid HMAC key"))?;
Mac::update(&mut hmac, initialisation_vector);
let mut ctr =
<Ctr32BE<Aes256> as KeyIvInit>::new_from_slices(cipher_key, initialisation_vector)
.map_err(|_| JsValue::from_str("Invalid CTR parameters"))?;
let mut decrypted_data = Vec::new();
let mut remaining_length = length;
while remaining_length > 0 {
let this_chunk_length = remaining_length.min(chunk_size);
remaining_length -= this_chunk_length;
let mut ciphertext = vec![0u8; this_chunk_length];
reader
.read_exact(&mut ciphertext)
.map_err(|e| JsValue::from_str(&format!("Failed to read chunk: {}", e)))?;
Mac::update(&mut hmac, &ciphertext);
let mut decrypted_chunk = ciphertext;
ctr.apply_keystream(&mut decrypted_chunk);
decrypted_data.extend(decrypted_chunk);
}
let mut their_mac = [0u8; 10];
reader
.read_exact(&mut their_mac)
.map_err(|e| JsValue::from_str(&format!("Failed to read MAC: {}", e)))?;
let our_mac = hmac.finalize().into_bytes();
if &their_mac != &our_mac[..10] {
return Err(JsValue::from_str(&format!(
"payload: MAC verification failed. Their MAC: {:02x?}, Our MAC: {:02x?}",
their_mac,
&our_mac[..10]
)));
}
Ok(Some(decrypted_data))
}
#[wasm_bindgen]
@ -241,16 +392,22 @@ pub struct BackupDecryptor {
database_bytes: Vec<u8>,
preferences: HashMap<String, HashMap<String, HashMap<String, serde_json::Value>>>,
key_values: HashMap<String, HashMap<String, serde_json::Value>>,
attachments: HashMap<String, Vec<u8>>,
stickers: HashMap<String, Vec<u8>>,
avatars: HashMap<String, Vec<u8>>,
ciphertext_buf: Vec<u8>,
plaintext_buf: Vec<u8>,
total_bytes_processed: usize,
total_bytes_received: usize,
is_initialized: bool,
should_update_hmac_next_run: bool,
current_backup_frame: Option<signal::BackupFrame>,
}
#[wasm_bindgen]
impl BackupDecryptor {
#[wasm_bindgen(constructor)]
pub fn new() -> Self {
console_error_panic_hook::set_once();
Self {
reader: ByteReader::new(Vec::new()),
keys: None,
@ -259,50 +416,126 @@ impl BackupDecryptor {
database_bytes: Vec::new(),
preferences: HashMap::new(),
key_values: HashMap::new(),
ciphertext_buf: Vec::with_capacity(1024 * 1024),
plaintext_buf: Vec::with_capacity(1024 * 1024),
total_bytes_processed: 0,
attachments: HashMap::new(),
stickers: HashMap::new(),
avatars: HashMap::new(),
ciphertext_buf: Vec::new(),
plaintext_buf: Vec::new(),
total_bytes_received: 0,
is_initialized: false,
should_update_hmac_next_run: true,
current_backup_frame: None,
}
}
#[wasm_bindgen]
pub fn feed_data(&mut self, chunk: &[u8]) {
let mut new_data = self.reader.remaining_data().to_vec();
// web_sys::console::log_1(
// &format!("feeding: position: {}", self.reader.get_position()).into(),
// );
// if self.reader.remaining_length() >= 10 {
// web_sys::console::log_1(
// &format!(
// "feeding: remaining data: {:02x?}",
// &self.reader.remaining_data()[..10]
// )
// .into(),
// );
// }
let current_size = self.reader.remaining_data().len();
let mut new_data = Vec::with_capacity(current_size + chunk.len());
new_data.extend_from_slice(self.reader.remaining_data());
new_data.extend_from_slice(chunk);
self.total_bytes_processed += chunk.len();
self.total_bytes_received += chunk.len();
self.reader = ByteReader::new(new_data);
}
#[wasm_bindgen]
pub fn process_chunk(
&mut self,
passphrase: &str,
progress_callback: &Function,
) -> Result<bool, JsValue> {
pub fn process_chunk(&mut self, passphrase: &str) -> Result<bool, JsValue> {
if !self.is_initialized {
// Initialize on first chunk
self.header_data = Some(read_backup_header(&mut self.reader)?);
let header_data = self.header_data.as_ref().unwrap();
self.keys = Some(derive_keys(passphrase, &header_data.salt)?);
self.initialisation_vector = Some(header_data.initialisation_vector.clone());
self.is_initialized = true;
return Ok(false);
}
// Calculate progress based on current position
let current_position = self.reader.position;
let percentage =
((current_position as f64 / self.total_bytes_processed as f64) * 100.0) as u32;
// Report progress
progress_callback
.call1(&JsValue::NULL, &JsValue::from_f64(percentage as f64))
.map_err(|e| JsValue::from_str(&format!("Failed to report progress: {:?}", e)))?;
let keys = self.keys.as_ref().unwrap();
let header_data = self.header_data.as_ref().unwrap();
let iv = self.initialisation_vector.as_ref().unwrap();
// this case happens when we had to load a new chunk because there wasn't enough data to fully decrypt the attachment
if self.current_backup_frame.is_some() {
// web_sys::console::log_1(
// &"going direct to payload decryption after loading new chunk".into(),
// );
let backup_frame_cloned = self.current_backup_frame.clone().unwrap();
let (filename, length, attachment_type) =
if let Some(attachment) = backup_frame_cloned.attachment {
(
format!("{}.bin", attachment.row_id.unwrap_or(0)),
attachment.length.unwrap_or(0),
AttachmentType::Attachment,
)
} else if let Some(sticker) = backup_frame_cloned.sticker {
(
format!("{}.bin", sticker.row_id.unwrap_or(0)),
sticker.length.unwrap_or(0),
AttachmentType::Sticker,
)
} else if let Some(avatar) = backup_frame_cloned.avatar {
(
format!("{}.bin", avatar.recipient_id.unwrap_or_default()),
avatar.length.unwrap_or(0),
AttachmentType::Avatar,
)
} else {
return Err(JsValue::from_str("Invalid field type found"));
};
match decrypt_frame_payload(
&mut self.reader,
length as usize,
&keys.hmac_key,
&keys.cipher_key,
// have to use new_iv!
iv.as_ref(),
8 * 1024,
) {
Ok(None) => {
// no need to assign newly here, can stay the same as we need to load even more data
return Ok(true);
}
Ok(Some(payload)) => {
self.current_backup_frame = None;
// match attachment_type {
// AttachmentType::Attachment => {
// self.attachments.insert(filename, payload);
// }
// AttachmentType::Sticker => {
// self.stickers.insert(filename, payload);
// }
// AttachmentType::Avatar => {
// self.avatars.insert(filename, payload);
// }
// }
// after attachments, we have to increment again
self.initialisation_vector = Some(increment_initialisation_vector(iv));
}
Err(e) => return Err(e),
}
return Ok(false);
}
// if we got to an attachment, but there we demand more data, it will be faulty, because we try to decrypt the frame although we would need
// to decrypt the attachment
match decrypt_frame(
&mut self.reader,
&keys.hmac_key,
@ -311,22 +544,31 @@ impl BackupDecryptor {
header_data.version,
&mut self.ciphertext_buf,
&mut self.plaintext_buf,
self.should_update_hmac_next_run,
) {
Ok(backup_frame) => {
self.initialisation_vector = Some(increment_initialisation_vector(iv));
Ok(None) => {
self.should_update_hmac_next_run = false;
return Ok(true);
}
Ok(Some(backup_frame)) => {
self.should_update_hmac_next_run = true;
// can not assign right here because of borrowing issues
let mut new_iv = increment_initialisation_vector(iv);
if backup_frame.end.unwrap_or(false) {
// Report 100% completion when done
progress_callback
.call1(&JsValue::NULL, &JsValue::from_f64(100.0))
.map_err(|e| {
JsValue::from_str(&format!("Failed to report final progress: {:?}", e))
})?;
self.initialisation_vector = Some(new_iv);
return Ok(true);
}
// Process frame contents
if let Some(statement) = backup_frame.statement {
// Handle all frame types
if let Some(version) = backup_frame.version {
if let Some(ver_num) = version.version {
let pragma_sql = format!("PRAGMA user_version = {}", ver_num);
self.database_bytes.extend_from_slice(pragma_sql.as_bytes());
self.database_bytes.push(b';');
}
} else if let Some(statement) = backup_frame.statement {
if let Some(sql) = statement.statement {
if !sql.to_lowercase().starts_with("create table sqlite_")
&& !sql.contains("sms_fts_")
@ -366,8 +608,10 @@ impl BackupDecryptor {
);
}
} else if let Some(key_value) = backup_frame.key_value {
let key = key_value.key.clone().unwrap_or_default();
let value_dict = self.key_values.entry(key).or_default();
let value_dict = self
.key_values
.entry(key_value.key.unwrap_or_default())
.or_default();
if let Some(boolean_value) = key_value.boolean_value {
value_dict.insert(
@ -410,14 +654,76 @@ impl BackupDecryptor {
)),
);
}
} else {
let backup_frame_cloned = backup_frame.clone();
let (filename, length, attachment_type) =
if let Some(attachment) = backup_frame_cloned.attachment {
(
format!("{}.bin", attachment.row_id.unwrap_or(0)),
attachment.length.unwrap_or(0),
AttachmentType::Attachment,
)
} else if let Some(sticker) = backup_frame_cloned.sticker {
(
format!("{}.bin", sticker.row_id.unwrap_or(0)),
sticker.length.unwrap_or(0),
AttachmentType::Sticker,
)
} else if let Some(avatar) = backup_frame_cloned.avatar {
(
format!("{}.bin", avatar.recipient_id.unwrap_or_default()),
avatar.length.unwrap_or(0),
AttachmentType::Avatar,
)
} else {
return Err(JsValue::from_str("Invalid field type found"));
};
match decrypt_frame_payload(
&mut self.reader,
length as usize,
&keys.hmac_key,
&keys.cipher_key,
// have to use new_iv!
new_iv.as_ref(),
8 * 1024,
) {
Ok(None) => {
// important: we need to apply the first new_iv here, else it won't be correct when resuming payload decryption
// as we return, we don't get to the final assignment below
self.initialisation_vector = Some(new_iv);
self.current_backup_frame = Some(backup_frame.clone());
return Ok(true);
}
Ok(Some(payload)) => {
// match attachment_type {
// AttachmentType::Attachment => {
// self.attachments.insert(filename, payload);
// }
// AttachmentType::Sticker => {
// self.stickers.insert(filename, payload);
// }
// AttachmentType::Avatar => {
// self.avatars.insert(filename, payload);
// }
// }
// after attachments, we have to increment again
new_iv = increment_initialisation_vector(&new_iv);
}
Err(e) => return Err(e),
}
}
// here we can finally assign
self.initialisation_vector = Some(new_iv);
Ok(false)
}
Err(e) => {
if e.as_string()
.unwrap_or_default()
.contains("unexpected end of file")
.map_or(false, |s| s.contains("unexpected end of file"))
{
Ok(false)
} else {
@ -440,53 +746,3 @@ impl BackupDecryptor {
})
}
}
// this would be used for attachments, stickers, avatars, which we might need later
// fn decrypt_frame_payload(
// reader: &mut ByteReader,
// length: usize,
// hmac_key: &[u8],
// cipher_key: &[u8],
// initialisation_vector: &[u8],
// chunk_size: usize,
// ) -> Result<Vec<u8>, JsValue> {
// let mut hmac = <HmacSha256 as Mac>::new_from_slice(hmac_key)
// .map_err(|_| JsValue::from_str("Invalid HMAC key"))?;
// Mac::update(&mut hmac, initialisation_vector);
// let mut ctr =
// <Ctr32BE<Aes256> as KeyIvInit>::new_from_slices(cipher_key, initialisation_vector)
// .map_err(|_| JsValue::from_str("Invalid CTR parameters"))?;
// let mut decrypted_data = Vec::new();
// let mut remaining_length = length;
// while remaining_length > 0 {
// let this_chunk_length = remaining_length.min(chunk_size);
// remaining_length -= this_chunk_length;
// let mut ciphertext = vec![0u8; this_chunk_length];
// reader
// .read_exact(&mut ciphertext)
// .map_err(|e| JsValue::from_str(&format!("Failed to read chunk: {}", e)))?;
// Mac::update(&mut hmac, &ciphertext);
// let mut decrypted_chunk = ciphertext;
// ctr.apply_keystream(&mut decrypted_chunk);
// decrypted_data.extend(decrypted_chunk);
// }
// let mut their_mac = [0u8; 10];
// reader
// .read_exact(&mut their_mac)
// .map_err(|e| JsValue::from_str(&format!("Failed to read MAC: {}", e)))?;
// let our_mac = hmac.finalize().into_bytes();
// if &their_mac != &our_mac[..10] {
// return Err(JsValue::from_str(
// "Bad MAC found. Passphrase may be incorrect or file corrupted or incompatible.",
// ));
// }
// Ok(decrypted_data)
// }

175
test/.gitignore vendored Normal file
View file

@ -0,0 +1,175 @@
# Based on https://raw.githubusercontent.com/github/gitignore/main/Node.gitignore
# Logs
logs
_.log
npm-debug.log_
yarn-debug.log*
yarn-error.log*
lerna-debug.log*
.pnpm-debug.log*
# Caches
.cache
# Diagnostic reports (https://nodejs.org/api/report.html)
report.[0-9]_.[0-9]_.[0-9]_.[0-9]_.json
# Runtime data
pids
_.pid
_.seed
*.pid.lock
# Directory for instrumented libs generated by jscoverage/JSCover
lib-cov
# Coverage directory used by tools like istanbul
coverage
*.lcov
# nyc test coverage
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.grunt
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bower_components
# node-waf configuration
.lock-wscript
# Compiled binary addons (https://nodejs.org/api/addons.html)
build/Release
# Dependency directories
node_modules/
jspm_packages/
# Snowpack dependency directory (https://snowpack.dev/)
web_modules/
# TypeScript cache
*.tsbuildinfo
# Optional npm cache directory
.npm
# Optional eslint cache
.eslintcache
# Optional stylelint cache
.stylelintcache
# Microbundle cache
.rpt2_cache/
.rts2_cache_cjs/
.rts2_cache_es/
.rts2_cache_umd/
# Optional REPL history
.node_repl_history
# Output of 'npm pack'
*.tgz
# Yarn Integrity file
.yarn-integrity
# dotenv environment variable files
.env
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.env.local
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out
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# vuepress v2.x temp and cache directory
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.DS_Store

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# test
To install dependencies:
```bash
bun install
```
To run:
```bash
bun run index.js
```
This project was created using `bun init` in bun v1.1.20. [Bun](https://bun.sh) is a fast all-in-one JavaScript runtime.

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<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
<meta name="theme-color" content="#000000" />
<!-- <link rel="shortcut icon" type="image/ico" href="/src/assets/favicon.ico" /> -->
</head>
<body>
<noscript>You need to enable JavaScript to run this app.</noscript>
<div id="root">
<form id="test-form">
<input type="password" id="passphrase-input" />
<input type="file" id="backup-input" />
</form>
</div>
<script src="./index.js" type="module"></script>
</body>
</html>

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import init, { BackupDecryptor } from "../pkg/signal_decrypt_backup_wasm.js";
let isInitialized = false;
async function initialize() {
if (!isInitialized) {
await init().catch((err) =>
console.error("Failed to initialize WASM module: ", err),
);
isInitialized = true;
}
}
export async function decryptBackup(file, passphrase, progressCallback) {
await initialize();
console.log("Starting decryption of file size:", file.size);
const decryptor = new BackupDecryptor();
const chunkSize = 1024 * 1024 * 40; // 40MB chunks
let offset = 0;
let percent;
try {
while (offset < file.size) {
const newPercent = Math.round((100 / file.size) * offset);
if (newPercent !== percent) {
percent = newPercent;
console.info(`${percent}% done`);
}
console.log(`Processing chunk at offset ${offset}`);
const chunk = file.slice(offset, offset + chunkSize);
const arrayBuffer = await chunk.arrayBuffer();
const uint8Array = new Uint8Array(arrayBuffer);
decryptor.feed_data(uint8Array);
let done = false;
while (!done) {
try {
done = await decryptor.process_chunk(passphrase, progressCallback);
} catch (e) {
console.error("Error processing chunk:", e);
throw e;
}
}
offset += chunkSize;
console.log(`Completed chunk, new offset: ${offset}`);
if (performance.memory) {
const memoryInfo = performance.memory;
console.log(`Total JS Heap Size: ${memoryInfo.totalJSHeapSize} bytes`);
console.log(`Used JS Heap Size: ${memoryInfo.usedJSHeapSize} bytes`);
console.log(`JS Heap Size Limit: ${memoryInfo.jsHeapSizeLimit} bytes`);
} else {
console.log("Memory information is not available in this environment.");
}
}
console.log("All chunks processed, finishing up");
console.log(window.performance.measureUserAgentSpecificMemory());
return decryptor.finish();
} catch (e) {
console.error("Decryption failed:", e);
throw e;
}
}
async function decrypt(file, passphrase) {
try {
const result = await decryptBackup(file, passphrase);
console.log("Database bytes length:", result.databaseBytes.length);
console.log("Preferences:", result.preferences);
console.log("Key values:", result.keyValues);
// Example: Convert database bytes to SQL statements
const sqlStatements = new TextDecoder().decode(result.databaseBytes);
console.log("SQL statements:", sqlStatements);
} catch (error) {
console.error("Decryption failed:", error);
}
}
/**
* @type {HTMLInputElement}
*/
const passphraseInput = document.querySelector("#passphrase-input");
/**
* @type {HTMLInputElement}
*/
const backupInput = document.querySelector("#backup-input");
backupInput.addEventListener("change", (event) => {
const file = event.currentTarget.files[0];
decrypt(file, passphraseInput.value);
});

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const server = Bun.serve({
static: {
"/": new Response(await Bun.file("./dist/index.html").bytes(), {
headers: {
"Content-Type": "text/html",
},
}),
"/index.js": new Response(await Bun.file("./dist/index.js").bytes(), {
headers: {
"Content-Type": "text/javascript",
},
}),
"/pkg/signal_decrypt_backup_wasm.js": new Response(
await Bun.file("../pkg/signal_decrypt_backup_wasm.js").bytes(),
{
headers: {
"Content-Type": "text/javascript",
},
},
),
"/pkg/signal_decrypt_backup_wasm_bg.wasm": new Response(
await Bun.file("../pkg/signal_decrypt_backup_wasm_bg.wasm").bytes(),
{
headers: {
"Content-Type": "application/wasm",
},
},
),
},
fetch(req) {
console.log(req);
return new Response("404!");
},
});

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{
"compilerOptions": {
// Enable latest features
"lib": ["ESNext", "DOM"],
"target": "ESNext",
"module": "ESNext",
"moduleDetection": "force",
"jsx": "react-jsx",
"allowJs": true,
// Bundler mode
"moduleResolution": "bundler",
"allowImportingTsExtensions": true,
"verbatimModuleSyntax": true,
"noEmit": true,
// Best practices
"strict": true,
"skipLibCheck": true,
"noFallthroughCasesInSwitch": true,
// Some stricter flags (disabled by default)
"noUnusedLocals": false,
"noUnusedParameters": false,
"noPropertyAccessFromIndexSignature": false
}
}

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{
"name": "test",
"module": "index.js",
"type": "module",
"devDependencies": {
"@types/bun": "latest"
},
"peerDependencies": {
"typescript": "^5.0.0"
}
}