This repository contains a small programm to decode a backup produced by Signal Android.
Rust v1.41 or higher is required. Install rust first and then execute the following command in a terminal:
cargo install signal-backup-decode
On Debian/Ubuntu you will need the following packages:
sudo apt install libsqlite3-dev libssl-dev pkg-config
This tool is run as signal-backup-decode. See signal-backup-decode --help:
signal-backup-decode 0.2.1
pajowu <[email protected]>
A simple tool to decode signal backups
USAGE:
signal-backup-decode [FLAGS] [OPTIONS] <INPUT> <--password <PASSWORD>|--password-file <FILE>|--password-command <COMMAND>>
FLAGS:
-f, --force Overwrite existing output files
-h, --help Prints help information
--no-in-memory-db Do not use in memory sqlite database. Database is immediately created on disk (only
considered with output type RAW).
--no-verify-mac Do not verify the HMAC of each frame in the backup
-V, --version Prints version information
OPTIONS:
-v, --verbosity <LEVEL> Verbosity level, either DEBUG, INFO, WARN, or ERROR
-o, --output-path <FOLDER> Directory to save output to. If not given, input file directory is used
-t, --output-type <TYPE> Output type, either RAW, CSV or NONE
--password-command <COMMAND> Read backup password from stdout from COMMAND
--password-file <FILE> File to read the backup password from
-p, --password <PASSWORD> Backup password (30 digits, with or without spaces)
ARGS:
<INPUT> Sets the input file to use
If you want to overwrite an existing backup, use the -f flag. Output type
NONE can be useful to check the backup file for corrupted frames but no
output is written to disk. Only the first line is read from
--password-command and --password-file.
This tool depends on parsed protoc files. A pre-generated version is included with in this repo, they can be regenerated using the feature flag rebuild-protobuf.
For regenerating the protobuf-files this tool, protoc has to be installed.
- Debian:
apt install protobuf-compiler - Arch:
pacman -S protobuf
Once protoc is installed, this tool can be installed using cargo:
cargo install --features "rebuild-protobuf" signal-backup-decode
This repository is under the GPLv3 License.
The proto/Backups.proto file is taken and derived from the Signal Android Source Code with the following copyright notice:
/**
* Copyright (C) 2018 Open Whisper Systems
*
* Licensed according to the LICENSE file in this repository.
*/