Initial commit
This commit is contained in:
Samuel
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checksum = "2b15c43186be67a4fd63bee50d0303afffcef381492ebe2c5d87f324e1b8815c"
|
||||
|
||||
[[package]]
|
||||
name = "rustix"
|
||||
version = "0.38.42"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "f93dc38ecbab2eb790ff964bb77fa94faf256fd3e73285fd7ba0903b76bedb85"
|
||||
dependencies = [
|
||||
"bitflags",
|
||||
"errno",
|
||||
"libc",
|
||||
"linux-raw-sys",
|
||||
"windows-sys",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "ryu"
|
||||
version = "1.0.18"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "f3cb5ba0dc43242ce17de99c180e96db90b235b8a9fdc9543c96d2209116bd9f"
|
||||
|
||||
[[package]]
|
||||
name = "serde"
|
||||
version = "1.0.216"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "0b9781016e935a97e8beecf0c933758c97a5520d32930e460142b4cd80c6338e"
|
||||
dependencies = [
|
||||
"serde_derive",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "serde_bytes"
|
||||
version = "0.11.15"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "387cc504cb06bb40a96c8e04e951fe01854cf6bc921053c954e4a606d9675c6a"
|
||||
dependencies = [
|
||||
"serde",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "serde_derive"
|
||||
version = "1.0.216"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "46f859dbbf73865c6627ed570e78961cd3ac92407a2d117204c49232485da55e"
|
||||
dependencies = [
|
||||
"proc-macro2",
|
||||
"quote",
|
||||
"syn 2.0.90",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "serde_json"
|
||||
version = "1.0.133"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "c7fceb2473b9166b2294ef05efcb65a3db80803f0b03ef86a5fc88a2b85ee377"
|
||||
dependencies = [
|
||||
"itoa",
|
||||
"memchr",
|
||||
"ryu",
|
||||
"serde",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "sha2"
|
||||
version = "0.10.8"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "793db75ad2bcafc3ffa7c68b215fee268f537982cd901d132f89c6343f3a3dc8"
|
||||
dependencies = [
|
||||
"cfg-if",
|
||||
"cpufeatures",
|
||||
"digest",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "signal-decrypt-backup-wasm"
|
||||
version = "0.1.0"
|
||||
dependencies = [
|
||||
"aes",
|
||||
"base64",
|
||||
"ctr",
|
||||
"hkdf",
|
||||
"hmac",
|
||||
"js-sys",
|
||||
"prost",
|
||||
"prost-build",
|
||||
"prost-types",
|
||||
"serde",
|
||||
"serde_bytes",
|
||||
"serde_json",
|
||||
"sha2",
|
||||
"wasm-bindgen",
|
||||
"web-sys",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "subtle"
|
||||
version = "2.6.1"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "13c2bddecc57b384dee18652358fb23172facb8a2c51ccc10d74c157bdea3292"
|
||||
|
||||
[[package]]
|
||||
name = "syn"
|
||||
version = "1.0.109"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "72b64191b275b66ffe2469e8af2c1cfe3bafa67b529ead792a6d0160888b4237"
|
||||
dependencies = [
|
||||
"proc-macro2",
|
||||
"quote",
|
||||
"unicode-ident",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "syn"
|
||||
version = "2.0.90"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "919d3b74a5dd0ccd15aeb8f93e7006bd9e14c295087c9896a110f490752bcf31"
|
||||
dependencies = [
|
||||
"proc-macro2",
|
||||
"quote",
|
||||
"unicode-ident",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "tempfile"
|
||||
version = "3.14.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "28cce251fcbc87fac86a866eeb0d6c2d536fc16d06f184bb61aeae11aa4cee0c"
|
||||
dependencies = [
|
||||
"cfg-if",
|
||||
"fastrand",
|
||||
"once_cell",
|
||||
"rustix",
|
||||
"windows-sys",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "typenum"
|
||||
version = "1.17.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "42ff0bf0c66b8238c6f3b578df37d0b7848e55df8577b3f74f92a69acceeb825"
|
||||
|
||||
[[package]]
|
||||
name = "unicode-ident"
|
||||
version = "1.0.14"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "adb9e6ca4f869e1180728b7950e35922a7fc6397f7b641499e8f3ef06e50dc83"
|
||||
|
||||
[[package]]
|
||||
name = "version_check"
|
||||
version = "0.9.5"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "0b928f33d975fc6ad9f86c8f283853ad26bdd5b10b7f1542aa2fa15e2289105a"
|
||||
|
||||
[[package]]
|
||||
name = "wasm-bindgen"
|
||||
version = "0.2.99"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "a474f6281d1d70c17ae7aa6a613c87fce69a127e2624002df63dcb39d6cf6396"
|
||||
dependencies = [
|
||||
"cfg-if",
|
||||
"once_cell",
|
||||
"wasm-bindgen-macro",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "wasm-bindgen-backend"
|
||||
version = "0.2.99"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "5f89bb38646b4f81674e8f5c3fb81b562be1fd936d84320f3264486418519c79"
|
||||
dependencies = [
|
||||
"bumpalo",
|
||||
"log",
|
||||
"proc-macro2",
|
||||
"quote",
|
||||
"syn 2.0.90",
|
||||
"wasm-bindgen-shared",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "wasm-bindgen-macro"
|
||||
version = "0.2.99"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "2cc6181fd9a7492eef6fef1f33961e3695e4579b9872a6f7c83aee556666d4fe"
|
||||
dependencies = [
|
||||
"quote",
|
||||
"wasm-bindgen-macro-support",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "wasm-bindgen-macro-support"
|
||||
version = "0.2.99"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "30d7a95b763d3c45903ed6c81f156801839e5ee968bb07e534c44df0fcd330c2"
|
||||
dependencies = [
|
||||
"proc-macro2",
|
||||
"quote",
|
||||
"syn 2.0.90",
|
||||
"wasm-bindgen-backend",
|
||||
"wasm-bindgen-shared",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "wasm-bindgen-shared"
|
||||
version = "0.2.99"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "943aab3fdaaa029a6e0271b35ea10b72b943135afe9bffca82384098ad0e06a6"
|
||||
|
||||
[[package]]
|
||||
name = "web-sys"
|
||||
version = "0.3.76"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "04dd7223427d52553d3702c004d3b2fe07c148165faa56313cb00211e31c12bc"
|
||||
dependencies = [
|
||||
"js-sys",
|
||||
"wasm-bindgen",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "which"
|
||||
version = "4.4.2"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "87ba24419a2078cd2b0f2ede2691b6c66d8e47836da3b6db8265ebad47afbfc7"
|
||||
dependencies = [
|
||||
"either",
|
||||
"home",
|
||||
"once_cell",
|
||||
"rustix",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "windows-sys"
|
||||
version = "0.59.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "1e38bc4d79ed67fd075bcc251a1c39b32a1776bbe92e5bef1f0bf1f8c531853b"
|
||||
dependencies = [
|
||||
"windows-targets",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "windows-targets"
|
||||
version = "0.52.6"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "9b724f72796e036ab90c1021d4780d4d3d648aca59e491e6b98e725b84e99973"
|
||||
dependencies = [
|
||||
"windows_aarch64_gnullvm",
|
||||
"windows_aarch64_msvc",
|
||||
"windows_i686_gnu",
|
||||
"windows_i686_gnullvm",
|
||||
"windows_i686_msvc",
|
||||
"windows_x86_64_gnu",
|
||||
"windows_x86_64_gnullvm",
|
||||
"windows_x86_64_msvc",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "windows_aarch64_gnullvm"
|
||||
version = "0.52.6"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "32a4622180e7a0ec044bb555404c800bc9fd9ec262ec147edd5989ccd0c02cd3"
|
||||
|
||||
[[package]]
|
||||
name = "windows_aarch64_msvc"
|
||||
version = "0.52.6"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "09ec2a7bb152e2252b53fa7803150007879548bc709c039df7627cabbd05d469"
|
||||
|
||||
[[package]]
|
||||
name = "windows_i686_gnu"
|
||||
version = "0.52.6"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "8e9b5ad5ab802e97eb8e295ac6720e509ee4c243f69d781394014ebfe8bbfa0b"
|
||||
|
||||
[[package]]
|
||||
name = "windows_i686_gnullvm"
|
||||
version = "0.52.6"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "0eee52d38c090b3caa76c563b86c3a4bd71ef1a819287c19d586d7334ae8ed66"
|
||||
|
||||
[[package]]
|
||||
name = "windows_i686_msvc"
|
||||
version = "0.52.6"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "240948bc05c5e7c6dabba28bf89d89ffce3e303022809e73deaefe4f6ec56c66"
|
||||
|
||||
[[package]]
|
||||
name = "windows_x86_64_gnu"
|
||||
version = "0.52.6"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "147a5c80aabfbf0c7d901cb5895d1de30ef2907eb21fbbab29ca94c5b08b1a78"
|
||||
|
||||
[[package]]
|
||||
name = "windows_x86_64_gnullvm"
|
||||
version = "0.52.6"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "24d5b23dc417412679681396f2b49f3de8c1473deb516bd34410872eff51ed0d"
|
||||
|
||||
[[package]]
|
||||
name = "windows_x86_64_msvc"
|
||||
version = "0.52.6"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "589f6da84c646204747d1270a2a5661ea66ed1cced2631d546fdfb155959f9ec"
|
||||
26
Cargo.toml
Normal file
26
Cargo.toml
Normal file
|
|
@ -0,0 +1,26 @@
|
|||
[package]
|
||||
name = "signal-decrypt-backup-wasm"
|
||||
version = "0.1.0"
|
||||
edition = "2021"
|
||||
|
||||
[lib]
|
||||
crate-type = ["cdylib", "rlib"]
|
||||
|
||||
[dependencies]
|
||||
wasm-bindgen = "0.2"
|
||||
js-sys = "0.3"
|
||||
web-sys = { version = "0.3", features = ["console"] }
|
||||
aes = "0.8"
|
||||
ctr = "0.9"
|
||||
hkdf = "0.12"
|
||||
hmac = "0.12"
|
||||
sha2 = "0.10"
|
||||
base64 = "0.21"
|
||||
serde = { version = "1.0", features = ["derive"] }
|
||||
serde_json = "1.0"
|
||||
prost = "0.11"
|
||||
prost-types = "0.11"
|
||||
serde_bytes = "0.11.15"
|
||||
|
||||
[build-dependencies]
|
||||
prost-build = "0.11"
|
||||
27
build.rs
Normal file
27
build.rs
Normal file
|
|
@ -0,0 +1,27 @@
|
|||
fn main() {
|
||||
let mut config = prost_build::Config::new();
|
||||
config.bytes(&["."]);
|
||||
config.type_attribute(".", "#[derive(::serde::Serialize, ::serde::Deserialize)]");
|
||||
|
||||
// For bytes fields, use with = "crate::bytes_serde"
|
||||
config.field_attribute(
|
||||
".signal.SqlStatement.SqlParameter.blobParameter",
|
||||
"#[serde(with = \"crate::bytes_serde\")]",
|
||||
);
|
||||
config.field_attribute(
|
||||
".signal.Header.iv",
|
||||
"#[serde(with = \"crate::bytes_serde\")]",
|
||||
);
|
||||
config.field_attribute(
|
||||
".signal.Header.salt",
|
||||
"#[serde(with = \"crate::bytes_serde\")]",
|
||||
);
|
||||
config.field_attribute(
|
||||
".signal.KeyValue.blobValue",
|
||||
"#[serde(with = \"crate::bytes_serde\")]",
|
||||
);
|
||||
|
||||
config
|
||||
.compile_protos(&["src/signal.proto"], &["src/"])
|
||||
.unwrap();
|
||||
}
|
||||
440
src/lib.rs
Normal file
440
src/lib.rs
Normal file
|
|
@ -0,0 +1,440 @@
|
|||
pub(crate) mod bytes_serde {
|
||||
use prost::bytes::Bytes;
|
||||
use serde::{Deserialize, Deserializer, Serializer};
|
||||
|
||||
pub fn serialize<S>(bytes: &Option<Bytes>, serializer: S) -> Result<S::Ok, S::Error>
|
||||
where
|
||||
S: Serializer,
|
||||
{
|
||||
match bytes {
|
||||
Some(b) => serializer.serialize_bytes(b),
|
||||
None => serializer.serialize_none(),
|
||||
}
|
||||
}
|
||||
|
||||
pub fn deserialize<'de, D>(deserializer: D) -> Result<Option<Bytes>, D::Error>
|
||||
where
|
||||
D: Deserializer<'de>,
|
||||
{
|
||||
Option::<Vec<u8>>::deserialize(deserializer).map(|opt| opt.map(|vec| Bytes::from(vec)))
|
||||
}
|
||||
}
|
||||
|
||||
use aes::Aes256;
|
||||
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::io::{self, Read};
|
||||
use wasm_bindgen::prelude::*;
|
||||
|
||||
type HmacSha256 = Hmac<Sha256>;
|
||||
|
||||
// Keep the original protobuf module
|
||||
pub mod signal {
|
||||
include!(concat!(env!("OUT_DIR"), "/signal.rs"));
|
||||
}
|
||||
|
||||
#[wasm_bindgen]
|
||||
pub struct DecryptionResult {
|
||||
database_bytes: Vec<u8>,
|
||||
preferences: String,
|
||||
key_values: String,
|
||||
}
|
||||
|
||||
#[wasm_bindgen]
|
||||
impl DecryptionResult {
|
||||
#[wasm_bindgen(getter)]
|
||||
pub fn database_bytes(&self) -> Vec<u8> {
|
||||
self.database_bytes.clone()
|
||||
}
|
||||
|
||||
#[wasm_bindgen(getter)]
|
||||
pub fn preferences(&self) -> String {
|
||||
self.preferences.clone()
|
||||
}
|
||||
|
||||
#[wasm_bindgen(getter)]
|
||||
pub fn key_values(&self) -> String {
|
||||
self.key_values.clone()
|
||||
}
|
||||
}
|
||||
|
||||
// Helper struct to read from byte slice
|
||||
struct ByteReader<'a> {
|
||||
data: &'a [u8],
|
||||
position: usize,
|
||||
}
|
||||
|
||||
impl<'a> ByteReader<'a> {
|
||||
fn new(data: &'a [u8]) -> Self {
|
||||
ByteReader { data, position: 0 }
|
||||
}
|
||||
}
|
||||
|
||||
impl<'a> Read for ByteReader<'a> {
|
||||
fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
|
||||
let available = self.data.len() - self.position;
|
||||
let amount = buf.len().min(available);
|
||||
|
||||
if amount == 0 {
|
||||
return Ok(0);
|
||||
}
|
||||
|
||||
buf[..amount].copy_from_slice(&self.data[self.position..self.position + amount]);
|
||||
self.position += amount;
|
||||
Ok(amount)
|
||||
}
|
||||
}
|
||||
|
||||
// Keep the original structs but without Debug derive
|
||||
struct HeaderData {
|
||||
initialisation_vector: Vec<u8>,
|
||||
salt: Vec<u8>,
|
||||
version: Option<u32>,
|
||||
}
|
||||
|
||||
struct Keys {
|
||||
cipher_key: Vec<u8>,
|
||||
hmac_key: Vec<u8>,
|
||||
}
|
||||
|
||||
fn derive_keys(passphrase: &str, salt: &[u8]) -> Result<Keys, JsValue> {
|
||||
let passphrase_bytes = passphrase.replace(" ", "").as_bytes().to_vec();
|
||||
|
||||
let mut hash = passphrase_bytes.clone();
|
||||
let mut sha512 = Sha512::new();
|
||||
|
||||
Digest::update(&mut sha512, salt);
|
||||
|
||||
for _ in 0..250000 {
|
||||
Digest::update(&mut sha512, &hash);
|
||||
Digest::update(&mut sha512, &passphrase_bytes);
|
||||
hash = sha512.finalize_reset().to_vec();
|
||||
}
|
||||
|
||||
let hkdf = Hkdf::<Sha256>::new(Some(b""), &hash[..32]);
|
||||
let mut keys = vec![0u8; 64];
|
||||
hkdf.expand(b"Backup Export", &mut keys)
|
||||
.map_err(|_| JsValue::from_str("HKDF expand failed"))?;
|
||||
|
||||
Ok(Keys {
|
||||
cipher_key: keys[..32].to_vec(),
|
||||
hmac_key: keys[32..].to_vec(),
|
||||
})
|
||||
}
|
||||
|
||||
fn increment_initialisation_vector(initialisation_vector: &[u8]) -> Vec<u8> {
|
||||
let mut counter = u32::from_be_bytes(initialisation_vector[..4].try_into().unwrap());
|
||||
counter = (counter + 1) & 0xFFFFFFFF;
|
||||
let mut new_iv = counter.to_be_bytes().to_vec();
|
||||
new_iv.extend_from_slice(&initialisation_vector[4..]);
|
||||
new_iv
|
||||
}
|
||||
|
||||
fn read_backup_header(reader: &mut ByteReader) -> Result<HeaderData, JsValue> {
|
||||
let mut length_bytes = [0u8; 4];
|
||||
reader
|
||||
.read_exact(&mut length_bytes)
|
||||
.map_err(|e| JsValue::from_str(&format!("Failed to read header length: {}", e)))?;
|
||||
|
||||
let length = u32::from_be_bytes(length_bytes);
|
||||
|
||||
let mut backup_frame_bytes = vec![0u8; length as usize];
|
||||
reader
|
||||
.read_exact(&mut backup_frame_bytes)
|
||||
.map_err(|e| JsValue::from_str(&format!("Failed to read backup frame: {}", e)))?;
|
||||
|
||||
let backup_frame = signal::BackupFrame::decode(&backup_frame_bytes[..])
|
||||
.map_err(|e| JsValue::from_str(&format!("Failed to decode backup frame: {}", e)))?;
|
||||
|
||||
let header = backup_frame
|
||||
.header
|
||||
.ok_or_else(|| JsValue::from_str("Missing header"))?;
|
||||
|
||||
Ok(HeaderData {
|
||||
initialisation_vector: header.iv.unwrap().to_vec(),
|
||||
salt: header.salt.unwrap().to_vec(),
|
||||
version: header.version,
|
||||
})
|
||||
}
|
||||
|
||||
fn decrypt_frame(
|
||||
reader: &mut ByteReader,
|
||||
hmac_key: &[u8],
|
||||
cipher_key: &[u8],
|
||||
initialisation_vector: &[u8],
|
||||
header_version: Option<u32>,
|
||||
ciphertext_buf: &mut Vec<u8>,
|
||||
plaintext_buf: &mut Vec<u8>,
|
||||
) -> Result<signal::BackupFrame, JsValue> {
|
||||
let mut hmac = <HmacSha256 as Mac>::new_from_slice(hmac_key)
|
||||
.map_err(|_| JsValue::from_str("Invalid HMAC key"))?;
|
||||
|
||||
let mut ctr =
|
||||
<Ctr32BE<Aes256> as KeyIvInit>::new_from_slices(cipher_key, initialisation_vector)
|
||||
.map_err(|_| JsValue::from_str("Invalid CTR parameters"))?;
|
||||
|
||||
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)
|
||||
}
|
||||
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);
|
||||
|
||||
let mut decrypted_length = encrypted_length;
|
||||
ctr.apply_keystream(&mut decrypted_length);
|
||||
u32::from_be_bytes(decrypted_length)
|
||||
}
|
||||
Some(v) => return Err(JsValue::from_str(&format!("Unsupported version: {}", v))),
|
||||
};
|
||||
|
||||
if length < 10 {
|
||||
return Err(JsValue::from_str("Frame too short"));
|
||||
}
|
||||
|
||||
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)))?;
|
||||
|
||||
let mut their_mac = [0u8; 10];
|
||||
reader
|
||||
.read_exact(&mut their_mac)
|
||||
.map_err(|e| JsValue::from_str(&format!("Failed to read MAC: {}", e)))?;
|
||||
|
||||
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"));
|
||||
}
|
||||
|
||||
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)))
|
||||
}
|
||||
|
||||
// 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)
|
||||
}
|
||||
|
||||
#[wasm_bindgen]
|
||||
pub fn decrypt_backup(
|
||||
backup_data: &[u8],
|
||||
passphrase: &str,
|
||||
progress_callback: &Function,
|
||||
) -> Result<DecryptionResult, JsValue> {
|
||||
let mut reader = ByteReader::new(backup_data);
|
||||
let total_size = backup_data.len();
|
||||
let mut last_percentage = 0;
|
||||
|
||||
// Set up collections for results
|
||||
let mut database_bytes = Vec::new();
|
||||
let mut preferences: std::collections::HashMap<
|
||||
String,
|
||||
std::collections::HashMap<String, std::collections::HashMap<String, serde_json::Value>>,
|
||||
> = std::collections::HashMap::new();
|
||||
let mut key_values: std::collections::HashMap<
|
||||
String,
|
||||
std::collections::HashMap<String, serde_json::Value>,
|
||||
> = std::collections::HashMap::new();
|
||||
|
||||
// Read header and derive keys
|
||||
let header_data = read_backup_header(&mut reader)?;
|
||||
let keys = derive_keys(passphrase, &header_data.salt)?;
|
||||
let mut initialisation_vector = header_data.initialisation_vector.clone();
|
||||
|
||||
// Pre-allocate buffers for frame decryption
|
||||
let mut ciphertext: Vec<u8> = Vec::with_capacity(1024 * 1024);
|
||||
let mut plaintext: Vec<u8> = Vec::with_capacity(1024 * 1024);
|
||||
|
||||
// Main decryption loop
|
||||
loop {
|
||||
// Update progress
|
||||
let current_position = reader.position;
|
||||
let percentage = ((current_position as f64 / total_size as f64) * 100.0) as u32;
|
||||
if percentage != last_percentage {
|
||||
progress_callback
|
||||
.call1(&JsValue::NULL, &JsValue::from_f64(percentage as f64))
|
||||
.map_err(|e| JsValue::from_str(&format!("Failed to report progress: {:?}", e)))?;
|
||||
last_percentage = percentage;
|
||||
}
|
||||
|
||||
let backup_frame = decrypt_frame(
|
||||
&mut reader,
|
||||
&keys.hmac_key,
|
||||
&keys.cipher_key,
|
||||
&initialisation_vector,
|
||||
header_data.version,
|
||||
&mut ciphertext,
|
||||
&mut plaintext,
|
||||
)?;
|
||||
|
||||
initialisation_vector = increment_initialisation_vector(&initialisation_vector);
|
||||
|
||||
if backup_frame.end.unwrap_or(false) {
|
||||
break;
|
||||
} 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_")
|
||||
&& !sql.contains("mms_fts_")
|
||||
{
|
||||
// Store SQL statements and parameters for database reconstruction
|
||||
database_bytes.extend_from_slice(sql.as_bytes());
|
||||
database_bytes.push(b';');
|
||||
}
|
||||
}
|
||||
} else if let Some(preference) = backup_frame.preference {
|
||||
let value_dict = preferences
|
||||
.entry(preference.file.unwrap_or_default())
|
||||
.or_default()
|
||||
.entry(preference.key.unwrap_or_default())
|
||||
.or_default();
|
||||
|
||||
if let Some(value) = preference.value {
|
||||
value_dict.insert("value".to_string(), serde_json::Value::String(value));
|
||||
}
|
||||
if let Some(boolean_value) = preference.boolean_value {
|
||||
value_dict.insert(
|
||||
"booleanValue".to_string(),
|
||||
serde_json::Value::Bool(boolean_value),
|
||||
);
|
||||
}
|
||||
if preference.is_string_set_value.unwrap_or(false) {
|
||||
value_dict.insert(
|
||||
"stringSetValue".to_string(),
|
||||
serde_json::Value::Array(
|
||||
preference
|
||||
.string_set_value
|
||||
.into_iter()
|
||||
.map(serde_json::Value::String)
|
||||
.collect(),
|
||||
),
|
||||
);
|
||||
}
|
||||
} else if let Some(key_value) = backup_frame.key_value {
|
||||
let value_dict = key_values
|
||||
.entry(key_value.key.unwrap_or_default())
|
||||
.or_default();
|
||||
|
||||
if let Some(boolean_value) = key_value.boolean_value {
|
||||
value_dict.insert(
|
||||
"booleanValue".to_string(),
|
||||
serde_json::Value::Bool(boolean_value),
|
||||
);
|
||||
}
|
||||
if let Some(float_value) = key_value.float_value {
|
||||
value_dict.insert(
|
||||
"floatValue".to_string(),
|
||||
serde_json::Value::Number(
|
||||
serde_json::Number::from_f64(float_value.into()).unwrap(),
|
||||
),
|
||||
);
|
||||
}
|
||||
if let Some(integer_value) = key_value.integer_value {
|
||||
value_dict.insert(
|
||||
"integerValue".to_string(),
|
||||
serde_json::Value::Number(integer_value.into()),
|
||||
);
|
||||
}
|
||||
if let Some(long_value) = key_value.long_value {
|
||||
value_dict.insert(
|
||||
"longValue".to_string(),
|
||||
serde_json::Value::Number(long_value.into()),
|
||||
);
|
||||
}
|
||||
if let Some(string_value) = key_value.string_value {
|
||||
value_dict.insert(
|
||||
"stringValue".to_string(),
|
||||
serde_json::Value::String(string_value),
|
||||
);
|
||||
}
|
||||
if let Some(blob_value) = key_value.blob_value {
|
||||
value_dict.insert(
|
||||
"blobValueBase64".to_string(),
|
||||
serde_json::Value::String(base64::Engine::encode(
|
||||
&base64::engine::general_purpose::STANDARD,
|
||||
&blob_value,
|
||||
)),
|
||||
);
|
||||
}
|
||||
}
|
||||
// Note: We're skipping attachments, stickers, and avatars for now
|
||||
}
|
||||
|
||||
// Final progress update
|
||||
progress_callback
|
||||
.call1(&JsValue::NULL, &JsValue::from_f64(100.0))
|
||||
.map_err(|e| JsValue::from_str(&format!("Failed to report final progress: {:?}", e)))?;
|
||||
|
||||
Ok(DecryptionResult {
|
||||
database_bytes,
|
||||
preferences: serde_json::to_string(&preferences)
|
||||
.map_err(|e| JsValue::from_str(&format!("Failed to serialize preferences: {}", e)))?,
|
||||
key_values: serde_json::to_string(&key_values)
|
||||
.map_err(|e| JsValue::from_str(&format!("Failed to serialize key_values: {}", e)))?,
|
||||
})
|
||||
}
|
||||
82
src/signal.proto
Normal file
82
src/signal.proto
Normal file
|
|
@ -0,0 +1,82 @@
|
|||
/**
|
||||
* Copyright (C) 2018 Open Whisper Systems
|
||||
*
|
||||
* Licensed according to the LICENSE file in this repository.
|
||||
*/
|
||||
|
||||
syntax = "proto2";
|
||||
|
||||
package signal;
|
||||
|
||||
option java_package = "org.thoughtcrime.securesms.backup.proto";
|
||||
|
||||
message SqlStatement {
|
||||
message SqlParameter {
|
||||
optional string stringParamter = 1;
|
||||
optional uint64 integerParameter = 2;
|
||||
optional double doubleParameter = 3;
|
||||
optional bytes blobParameter = 4;
|
||||
optional bool nullparameter = 5;
|
||||
}
|
||||
|
||||
optional string statement = 1;
|
||||
repeated SqlParameter parameters = 2;
|
||||
}
|
||||
|
||||
message SharedPreference {
|
||||
optional string file = 1;
|
||||
optional string key = 2;
|
||||
optional string value = 3;
|
||||
optional bool booleanValue = 4;
|
||||
repeated string stringSetValue = 5;
|
||||
optional bool isStringSetValue = 6;
|
||||
}
|
||||
|
||||
message Attachment {
|
||||
optional uint64 rowId = 1;
|
||||
optional uint64 attachmentId = 2;
|
||||
optional uint32 length = 3;
|
||||
}
|
||||
|
||||
message Sticker {
|
||||
optional uint64 rowId = 1;
|
||||
optional uint32 length = 2;
|
||||
}
|
||||
|
||||
message Avatar {
|
||||
optional string name = 1;
|
||||
optional string recipientId = 3;
|
||||
optional uint32 length = 2;
|
||||
}
|
||||
|
||||
message DatabaseVersion {
|
||||
optional uint32 version = 1;
|
||||
}
|
||||
|
||||
message Header {
|
||||
optional bytes iv = 1;
|
||||
optional bytes salt = 2;
|
||||
optional uint32 version = 3;
|
||||
}
|
||||
|
||||
message KeyValue {
|
||||
optional string key = 1;
|
||||
optional bytes blobValue = 2;
|
||||
optional bool booleanValue = 3;
|
||||
optional float floatValue = 4;
|
||||
optional int32 integerValue = 5;
|
||||
optional int64 longValue = 6;
|
||||
optional string stringValue = 7;
|
||||
}
|
||||
|
||||
message BackupFrame {
|
||||
optional Header header = 1;
|
||||
optional SqlStatement statement = 2;
|
||||
optional SharedPreference preference = 3;
|
||||
optional Attachment attachment = 4;
|
||||
optional DatabaseVersion version = 5;
|
||||
optional bool end = 6;
|
||||
optional Avatar avatar = 7;
|
||||
optional Sticker sticker = 8;
|
||||
optional KeyValue keyValue = 9;
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue