Implement experimental file-based encrypted private chat

Add fixed-suite Rust/WASI identity files, signed challenge authentication, ciphertext-only SQLite storage, a minimal LibreJS-compatible interface, and consistent backup snapshots. Keep production unchanged and document the local workflow, limits, source distribution, and browser recovery tests.

1 files changed, 46 insertions, 0 deletions

diff --git a/crates/chat-server/Cargo.toml b/crates/chat-server/Cargo.toml
new file mode 100644
index 0000000..eecebf6
--- /dev/null
+++ b/crates/chat-server/Cargo.toml
@@ -0,0 +1,46 @@
+# Copyright (C) 2026 Doan Luu Duc Tai <doan@luuduct.ai>
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as
+# published by the Free Software Foundation, either version 3 of the
+# License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+[package]
+name = "stack-chat-server"
+version = "0.1.0"
+edition = "2024"
+license = "AGPL-3.0-or-later"
+authors = ["Doan Luu Duc Tai <doan@luuduct.ai>"]
+description = "Encrypted private chat storage and authenticated access."
+repository = "https://git.doan.luuduct.ai/stack"
+readme = "README.txt"
+keywords = ["chat", "openpgp", "privacy"]
+categories = ["web-programming"]
+publish = false
+
+[dependencies]
+anyhow = "1"
+axum = { version = "0.8", default-features = false, features = ["http1", "tokio", "json"] }
+base64 = "0.22"
+clap = { version = "4.6", features = ["derive"] }
+dotenvy = "0.15"
+hex = "0.4"
+openssl = "0.10"
+rusqlite = { version = "0.41", default-features = false, features = ["bundled", "backup"] }
+serde_json = "1"
+stack-chat-crypto = { path = "../chat-crypto", version = "0.1.0" }
+tokio = { version = "1", features = ["rt-multi-thread", "net", "macros", "signal", "sync", "fs"] }
+
+[dev-dependencies]
+tempfile = "3"
+
+[lints]
+workspace = true