commit 0bdaa94dd581b7b093fc2fe0064e2d2bf78e1ecb
Author: Sarah Jamie Lewis <sarah@openprivacy.ca>
Date:   Wed Feb 10 19:37:16 2021 -0800

    Initial Commit

diff --git a/.gitignore b/.gitignore
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index 0000000..8c68b38
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diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..b2645c7
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,2 @@
+[workspace]
+members=["./niwl", "niwl-client","niwl-server"]
\ No newline at end of file
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..5316ac7
--- /dev/null
+++ b/README.md
@@ -0,0 +1,35 @@
+# niwl - a prototype system for metadata resistant notifications
+
+**niwl** (_/nɪu̯l/_) - fog, mist or haze (Welsh).
+
+Privacy preserving applications often require a mechanism for providing notifications to parties that an
+event has happened e.g. a new group message, a payment etc.  
+
+**niwl** provides a set of libraries, clients and servers to provide this in a metadata resistant, bandwidth
+efficient way based on [fuzzytags](https://crates.io/crates/fuzzytags).
+
+# Overview
+
+**niwl-server** provides a web server with a json API for posting new tags and querying the tags database.
+
+**niwl-client** provides a command-line application for managing secrets, tagging keys of parties and posting / querying
+for new tags.
+
+For a more detailed overview please check out each individual crate.
+
+# Example
+
+
+    niwl-client alice.profile generate "alice"
+    Tagging Key: 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
+    niwl-client bob.profile generate "bob"
+    Tagging Key: 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
+
+    niwl-client alice.profile import-tagging-key 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
+    Got: bob: 4211f14667b425649390eee099c4e84bf758a1a4e6375e23b50c6de347c25654
+
+    niwl-client alice.profile tag-and-send bob 
+    Tag for bob 7e441275a5c3f88606c34c3451a44eaeaa025680cfcb3d9db53992501cc22134 4f7a7f961bc19297fee98da5f8601aa8373429b80b10c55dbe8116aa8c497a0e 71d8da
+
+    niwl-client bob.profile detect 10
+    7e441275a5c3f88606c34c3451a44eaeaa025680cfcb3d9db53992501cc22134 4f7a7f961bc19297fee98da5f8601aa8373429b80b10c55dbe8116aa8c497a0e 71d8da
\ No newline at end of file
diff --git a/niwl-client/Cargo.toml b/niwl-client/Cargo.toml
new file mode 100644
index 0000000..cf03c4c
--- /dev/null
+++ b/niwl-client/Cargo.toml
@@ -0,0 +1,19 @@
+[package]
+name = "niwl-client"
+version = "0.1.0"
+authors = ["Sarah Jamie Lewis <sarah@openprivacy.ca>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+niwl = {path="../niwl"}
+fuzzytags = {path="../../fuzzymetatag"}
+clap = "3.0.0-beta.2"
+serde = {version="1.0.123", features=["derive"]}
+serde_json = "1.0.61"
+bincode = "1.3.1"
+hex = "0.4.2"
+base32 = "0.4.0"
+reqwest = {version="0.11.0", features=["json"]}
+tokio = "1.2.0"
\ No newline at end of file
diff --git a/niwl-client/src/main.rs b/niwl-client/src/main.rs
new file mode 100644
index 0000000..40da673
--- /dev/null
+++ b/niwl-client/src/main.rs
@@ -0,0 +1,114 @@
+use clap::Clap;
+use std::fs;
+use niwl::{Profile};
+
+#[derive(Clap)]
+#[clap(version = "1.0", author = "Sarah Jamie Lewis <sarah@openprivacy.ca>")]
+struct Opts {
+
+    #[clap(default_value = "niwl.profile")]
+    profile_filename: String,
+
+    #[clap(default_value = "http://localhost:8000")]
+    niwl_server: String,
+
+    #[clap(subcommand)]
+    subcmd: SubCommand,
+}
+
+#[derive(Clap)]
+enum SubCommand {
+    Generate(Generate),
+    ImportTaggingKey(ImportTaggingKey),
+    TagAndSend(TagAndSend),
+    Detect(Detect)
+}
+
+/// Generate a new niwl.profile file
+#[derive(Clap)]
+struct Generate {
+    name: String
+}
+
+/// Import a friends tagging key into this profile so you can send messages to them
+#[derive(Clap)]
+struct ImportTaggingKey {
+    key: String
+}
+
+/// Connect to a server and check for new notifications
+#[derive(Clap)]
+struct Detect {
+    #[clap(default_value = "2")]
+    length: u8
+}
+
+/// Send a message to a friend tagged with their niwl key
+#[derive(Clap)]
+struct TagAndSend {
+    /// the id of the friend e.g. "alice"
+    id: String,
+    /// the message you want to send.
+    message: String,
+}
+
+fn get_profile(profile_filename: &String) -> Profile {
+     match fs::read_to_string(profile_filename) {
+        Ok(json) => serde_json::from_str(json.as_str()).unwrap(),
+        Err(why) => {
+            panic!("couldn't read orb.profile : {}", why);
+        }
+    }
+}
+
+
+
+fn main() {
+    let opts: Opts = Opts::parse();
+    match opts.subcmd {
+        SubCommand::Generate(g) => {
+            let profile = Profile::new(g.name.clone());
+            let hotk = profile.human_readable_tagging_key();
+            println!("Tagging Key: {}", base32::encode(base32::Alphabet::RFC4648{padding:false} ,bincode::serialize(&hotk).unwrap().as_slice()).to_ascii_lowercase());
+            profile.save(&opts.profile_filename);
+        }
+        SubCommand::ImportTaggingKey(cmd) => {
+            let mut profile = get_profile(&opts.profile_filename);
+            profile.import_tagging_key(&cmd.key);
+            profile.save(&opts.profile_filename);
+        },
+        SubCommand::TagAndSend(cmd) => {
+            let mut profile = get_profile(&opts.profile_filename);
+            let server = opts.niwl_server.clone();
+            let contact = cmd.id.clone();
+            tokio::runtime::Builder::new_current_thread()
+                .enable_all()
+                .build()
+                .unwrap()
+                .block_on(async {
+                    let result = profile.tag_and_send(server, contact).await;
+                    println!("{}", result.unwrap().text().await.unwrap());
+                });
+        },
+        SubCommand::Detect(cmd) => {
+            let mut profile = get_profile(&opts.profile_filename);
+            let server = opts.niwl_server.clone();
+            tokio::runtime::Builder::new_current_thread()
+                .enable_all()
+                .build()
+                .unwrap()
+                .block_on(async {
+                    match profile.detect_tags(server).await {
+                        Ok(detected_tags) => {
+                            for tag in detected_tags.detected_tags {
+                                println!("{}", tag);
+                            }
+                        },
+                        Err(err) => {
+                            println!("Error: {}", err)
+                        }
+                    }
+                });
+        }
+    }
+}
diff --git a/niwl-server/Cargo.toml b/niwl-server/Cargo.toml
new file mode 100644
index 0000000..3bae9bf
--- /dev/null
+++ b/niwl-server/Cargo.toml
@@ -0,0 +1,13 @@
+[package]
+name = "niwl-server"
+version = "0.1.0"
+authors = ["Sarah Jamie Lewis <sarah@openprivacy.ca>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+fuzzytags = {path="../../fuzzymetatag"}
+rocket = "0.4.6"
+rocket_contrib = {version="0.4.6", features=["sqlite_pool"]}
+chrono = "0.4.19"
\ No newline at end of file
diff --git a/niwl-server/README.md b/niwl-server/README.md
new file mode 100644
index 0000000..795cbdd
--- /dev/null
+++ b/niwl-server/README.md
@@ -0,0 +1,13 @@
+
+## Building
+
+Requires `libsqlite3`
+    
+    sudo apt install libsqlite3-dev
+    
+## Running
+
+First setup the database:
+
+    cat sql/create.sql | sqlite3 tags.sqlite
+ 
\ No newline at end of file
diff --git a/niwl-server/Rocket.toml b/niwl-server/Rocket.toml
new file mode 100644
index 0000000..ce477b9
--- /dev/null
+++ b/niwl-server/Rocket.toml
@@ -0,0 +1,2 @@
+[global.databases]
+tags = { url = "./tags.sqlite", pool_size = 20 }
\ No newline at end of file
diff --git a/niwl-server/sql/create.sql b/niwl-server/sql/create.sql
new file mode 100644
index 0000000..67b6d0b
--- /dev/null
+++ b/niwl-server/sql/create.sql
@@ -0,0 +1,4 @@
+create table if not exists tags (
+              id text primary key,
+              tag blob not null unique
+          )
\ No newline at end of file
diff --git a/niwl-server/src/main.rs b/niwl-server/src/main.rs
new file mode 100644
index 0000000..6c37c59
--- /dev/null
+++ b/niwl-server/src/main.rs
@@ -0,0 +1,55 @@
+#![feature(proc_macro_hygiene, decl_macro)]
+
+#[macro_use] extern crate rocket;
+#[macro_use] extern crate rocket_contrib;
+
+use rocket_contrib::json;
+use fuzzytags::{DetectionKey, Tag};
+use rocket_contrib::json::{Json, JsonValue};
+use rocket_contrib::databases::rusqlite;
+use rocket_contrib::databases::rusqlite::types::ToSql;
+use chrono::{Utc, Duration};
+use std::ops::Sub;
+
+#[database("tags")]
+struct TagsDbConn(rusqlite::Connection);
+
+#[post("/new", format = "application/json", data = "<tag>")]
+fn new(conn:TagsDbConn, tag: Json<Tag<24>>) -> JsonValue {
+    conn.0.execute(
+        "INSERT INTO tags (id, tag) VALUES (strftime('%Y-%m-%d %H:%M:%S:%f', 'now'), ?1)",
+        &[&tag.0.compress() as &dyn ToSql],
+    ).unwrap();
+    json!({"tag" : tag.to_string()})
+}
+
+#[post("/tags", format = "application/json", data = "<detection_key>")]
+fn tags(conn:TagsDbConn, detection_key: Json<DetectionKey<24>>) -> JsonValue {
+
+    let mut stmt = conn.0.prepare(
+        "SELECT tag FROM tags WHERE id > (?1) AND id < (?2)",
+    ).unwrap();
+
+    let now = Utc::now();
+    let after = now.sub(Duration::days(1)).format("%Y-%m-%d %H:%M:%S:%f").to_string();
+    let before = now.format("%Y-%m-%d %H:%M:%S:%f").to_string();
+    let selected_tags = stmt.query_map(&[&after, &before], |row| {
+        let tag_bytes : Vec<u8> = row.get(0);
+        let tag = Tag::<24>::decompress(tag_bytes.as_slice()).unwrap();
+        tag
+    }).unwrap();
+
+    let mut detected_tags : Vec<Tag<24>> = vec![];
+    for tag in selected_tags {
+        let tag : Tag<24> = tag.unwrap();
+        if detection_key.0.test_tag(&tag) {
+            detected_tags.push(tag);
+        }
+    }
+
+    json!({"detected_tags" : detected_tags})
+}
+
+fn main() {
+    rocket::ignite().attach(TagsDbConn::fairing()).mount("/", routes![tags, new]).launch();
+}
diff --git a/niwl/Cargo.toml b/niwl/Cargo.toml
new file mode 100644
index 0000000..d962810
--- /dev/null
+++ b/niwl/Cargo.toml
@@ -0,0 +1,16 @@
+[package]
+name = "niwl"
+version = "0.1.0"
+authors = ["Sarah Jamie Lewis <sarah@openprivacy.ca>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+fuzzytags = {path="../../fuzzymetatag"}
+serde = {version="1.0.123", features=["derive"]}
+serde_json = "1.0.61"
+bincode = "1.3.1"
+hex = "0.4.2"
+base32 = "0.4.0"
+reqwest = {version="0.11.0", features=["json"]}
\ No newline at end of file
diff --git a/niwl/src/lib.rs b/niwl/src/lib.rs
new file mode 100644
index 0000000..58d37a8
--- /dev/null
+++ b/niwl/src/lib.rs
@@ -0,0 +1,121 @@
+#![feature(into_future)]
+use fuzzytags::{RootSecret, TaggingKey, Tag};
+use std::fs::File;
+use std::io::Write;
+use serde::{Deserialize, Serialize};
+use std::collections::HashMap;
+use reqwest::{Response, Error};
+use std::future::{Future, IntoFuture};
+
+#[derive(Debug)]
+pub enum NiwlError {
+    NoKnownContactError(String),
+    RemoteServerError(String)
+}
+
+#[derive(Serialize,Deserialize)]
+pub struct Profile {
+    profile_name: String,
+    root_secret: RootSecret<24>,
+    tagging_keys: HashMap<String, TaggingKey<24>>,
+}
+
+#[derive(Serialize,Deserialize)]
+pub struct HumanOrientedTaggingKey {
+    profile_name: String,
+    tagging_key: TaggingKey<24>,
+}
+
+#[derive(Deserialize)]
+pub struct DetectedTags {
+    pub detected_tags: Vec<Tag<24>>,
+}
+
+impl Profile {
+    pub fn new(profile_name: String) -> Profile {
+        let root_secret = RootSecret::<24>::generate();
+        Profile {
+            profile_name,
+            root_secret,
+            tagging_keys: Default::default()
+        }
+    }
+
+    pub fn human_readable_tagging_key(&self) -> HumanOrientedTaggingKey {
+        let tagging_key = self.root_secret.tagging_key();
+        HumanOrientedTaggingKey {
+            profile_name: self.profile_name.clone(),
+            tagging_key
+        }
+    }
+
+    pub fn save(&self, profile_filename: &String) -> std::io::Result<()> {
+        let j = serde_json::to_string(&self);
+        let mut file = match File::create(profile_filename) {
+            Err(why) => panic!("couldn't create : {}", why),
+            Ok(file) => file,
+        };
+        file.write_all(j.unwrap().as_bytes())
+    }
+
+    pub fn generate_tag(&self, id: &String) -> Result<Tag<24>, NiwlError> {
+        if self.tagging_keys.contains_key(id) {
+            let tag = self.tagging_keys[id].generate_tag();
+            println!("Tag for {} {}", id, tag.to_string());
+            return Ok(tag)
+        }
+        Err(NiwlError::NoKnownContactError(format!("No known friend {}. Perhaps you need to import-tagging-key first?", id)))
+    }
+
+    pub fn import_tagging_key(&mut self, key: &String) {
+        match base32::decode(base32::Alphabet::RFC4648 { padding: false }, key.as_str()) {
+            Some(data) => {
+                let tagging_key_result: Result<HumanOrientedTaggingKey, bincode::Error> = bincode::deserialize(&data);
+                match tagging_key_result {
+                    Ok(hotk) => {
+                        println!("Got: {}: {}", hotk.profile_name, hotk.tagging_key.id());
+                        if self.tagging_keys.contains_key(&hotk.profile_name) == false {
+                            self.tagging_keys.insert(hotk.profile_name, hotk.tagging_key);
+                        } else {
+                            println!("There is already an entry for {}", hotk.profile_name)
+                        }
+                        return
+                    }
+                    Err(err) => {
+                        println!("Error: {}", err.to_string());
+                    }
+                }
+            },
+            _ => {}
+        };
+        println!("Error Reporting Tagging Key")
+    }
+
+    pub async fn tag_and_send(&self, server: String, contact: String) -> Result<Response, NiwlError> {
+        let client = reqwest::Client::new();
+        match self.generate_tag(&contact) {
+            Ok(tag) => {
+                let result = client.
+                    post(&String::from(server + "/new"))
+                    .json(&tag)
+                    .send().await;
+                match result {
+                    Ok(response) => Ok(response),
+                    Err(err) => Err(NiwlError::RemoteServerError(err.to_string()))
+                }
+            }
+            Err(err) => {
+                Err(err)
+            }
+        }
+    }
+
+    pub async fn detect_tags(&mut self, server: String) -> Result<DetectedTags, Error> {
+        let client = reqwest::Client::new();
+        let detection_key = self.root_secret.extract_detection_key(1);
+        let result = client.post(&String::from(server + "/tags"))
+            .json(&detection_key)
+            .send().await;
+        result.unwrap().json().await
+    }
+}
\ No newline at end of file