From b2766622c8274e9944b023660cfd83d44520face Mon Sep 17 00:00:00 2001
From: TymanWasTaken <tbeckman530@gmail.com>
Date: Sun, 25 Jun 2023 22:35:50 -0600
Subject: [PATCH] Initial commit with key generation, key import from
base64-encoded private ES256 keys, profile generation, and profile parsing
---
.gitignore | 2 +
Cargo.lock | 678 +++++++++++++++++++++++++++++++++++++++++++++++++
Cargo.toml | 17 ++
rustfmt.toml | 1 +
src/main.rs | 249 ++++++++++++++++++
src/structs.rs | 31 +++
6 files changed, 978 insertions(+)
create mode 100644 .gitignore
create mode 100644 Cargo.lock
create mode 100644 Cargo.toml
create mode 100644 rustfmt.toml
create mode 100644 src/main.rs
create mode 100644 src/structs.rs
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..46f02c1
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
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+*.jw[tk]
\ No newline at end of file
diff --git a/Cargo.lock b/Cargo.lock
new file mode 100644
index 0000000..6d788b1
--- /dev/null
+++ b/Cargo.lock
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diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..68be0f9
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,17 @@
+[package]
+name = "ariadne-signature-profile-proto"
+authors = ["Ty"]
+description = "A prototype implementation of the ariadne signature profile specification"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+clap = { version = "4.3.8", features = ["derive"] }
+data-encoding = "2.4.0"
+indoc = "2.0.1"
+josekit = "0.8.3"
+serde = { version = "1.0.164", features = ["derive"] }
+serde_json = "1.0.99"
+sha2 = "0.10.7"
diff --git a/rustfmt.toml b/rustfmt.toml
new file mode 100644
index 0000000..218e203
--- /dev/null
+++ b/rustfmt.toml
@@ -0,0 +1 @@
+hard_tabs = true
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..baeb073
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,249 @@
+mod structs;
+
+use std::{
+ fs::File,
+ io::{Read, Write},
+};
+
+use clap::{Parser, Subcommand};
+use data_encoding::{BASE32_NOPAD, BASE64URL_NOPAD, BASE64_NOPAD};
+use indoc::printdoc;
+use josekit::{
+ jwk::{alg::ec::EcCurve, Jwk},
+ jws::{JwsHeader, ES256},
+ jwt::{self, JwtPayload},
+};
+use sha2::{Digest, Sha512};
+use structs::JwkExt;
+
+use crate::structs::{AspClaims, AspType};
+
+// Prototype implementation of ASPs
+#[derive(Parser)]
+#[command(author, version, about, long_about = None)]
+#[command(propagate_version = true)]
+struct Cli {
+ #[command(subcommand)]
+ command: Commands,
+}
+
+#[derive(Subcommand)]
+enum Commands {
+ /// Creates a new JWK (EC, p-256)
+ CreateKey {
+ /// The file to output to (or - for stdout)
+ #[arg(short, long)]
+ file: String
+ },
+ /// Converts a pkcs8 private key to a JWK (Ec, p-256)
+ ConvertPkcs8 {
+ /// The pkcs8-encoded private key
+ data: String,
+ /// The file to output to (or - for stdout)
+ #[arg(short, long)]
+ file: String
+ },
+ /// Creates a profile with the specified claims
+ CreateProfile {
+ /// The path of the key file (stored in JSON JWK format) to be used when signing the profile, or - to parse a JWK from stdin. This can be generated with the `create-key` subcommand.
+ #[arg(short, long)]
+ key: String,
+ /// The claims to use on the profile
+ #[arg(short, long)]
+ claim: Vec<String>,
+ /// The name to use for the profile
+ #[arg(short, long)]
+ name: String,
+ /// The description to use for the profile
+ #[arg(short, long)]
+ description: Option<String>,
+ /// The url for the avatar of this profile
+ #[arg(short, long)]
+ avatar_url: Option<String>,
+ /// The email to use for this profile
+ #[arg(short, long)]
+ email: Option<String>,
+ /// The color to use for this profile
+ #[arg(long)]
+ color: Option<String>,
+ },
+ /// Parses and displays nicely a profile JWT
+ ParseProfile {
+ /// The file (or "-") that contains the JWT
+ profile: String,
+ },
+}
+
+impl JwkExt for Jwk {
+ fn fingerprint(&self) -> String {
+ let fingerprint = self
+ .parameter("x")
+ .expect("jwk did not contain an \"x\" value");
+ let fingerprint = BASE64URL_NOPAD
+ .decode(fingerprint.as_str().unwrap().as_bytes())
+ .expect("unable to base64 decode JWK \"x\" value");
+ let fingerprint: Vec<u8> = {
+ let mut hash = Sha512::new();
+ hash.update(fingerprint);
+ hash.finalize().to_vec()
+ };
+ let fingerprint = &fingerprint[0..16];
+ let fingerprint = BASE32_NOPAD.encode(fingerprint);
+ fingerprint
+ }
+}
+
+fn main() {
+ let args = Cli::parse();
+
+ match &args.command {
+ Commands::CreateKey { file } => {
+ let key = Jwk::generate_ec_key(EcCurve::P256).expect("Unable to generate EC256 JWK");
+ if file != "-" {
+ let mut file = File::create("key.jwk").unwrap();
+ file.write_all(key.to_string().as_bytes()).expect("unable to write key to file");
+ } else {
+ std::io::stdout().write_all(key.to_string().as_bytes()).expect("unable to write key to stdout");
+ };
+ },
+ Commands::ConvertPkcs8 { data, file } => {
+ let keypair = ES256.key_pair_from_der(
+ BASE64_NOPAD.decode(data.as_bytes()).expect("unable to base64 decode input private key")
+ ).expect("unable to parse private key into an ES256 key pair");
+ let jwk = keypair.to_jwk_key_pair();
+
+ if file != "-" {
+ let mut file = File::create("key.jwk").unwrap();
+ file.write_all(jwk.to_string().as_bytes()).expect("unable to write key to file");
+ } else {
+ std::io::stdout().write_all(jwk.to_string().as_bytes()).expect("unable to write key to stdout");
+ };
+ }
+ Commands::CreateProfile {
+ key,
+ claim,
+ name,
+ description,
+ avatar_url,
+ email,
+ color,
+ } => {
+ let mut jwk_bytes = Vec::new();
+ if key == "-" {
+ std::io::stdin()
+ .read_to_end(&mut jwk_bytes)
+ .expect("unable to read from stdin");
+ } else {
+ File::open(key)
+ .expect("unable to open keyfile")
+ .read_to_end(&mut jwk_bytes)
+ .expect("unable to read keyfile");
+ };
+
+ let jwk = Jwk::from_bytes(jwk_bytes).expect("unable to parse jwk");
+
+ // Derive the key fingerprint from the JWT
+ let fingerprint = jwk.fingerprint();
+
+ // Construct the JWT header
+ let mut header = JwsHeader::new();
+ header.set_token_type("JWT");
+ header.set_algorithm("ES256");
+ header.set_jwk(
+ jwk.to_public_key()
+ .expect("unable to convert jwk to public key"),
+ );
+ header.set_key_id(fingerprint);
+
+ // Construct the JWT payload
+ let payload = JwtPayload::from_map(
+ serde_json::to_value(AspClaims {
+ name: name.clone(),
+ version: 0,
+ r#type: AspType::Profile,
+ claims: claim.clone(),
+ description: description.clone(),
+ avatar_url: avatar_url.clone(),
+ email: email.clone(),
+ color: color.clone(),
+ })
+ .unwrap()
+ .as_object()
+ .unwrap()
+ .clone(),
+ )
+ .expect("unable to create payload from map of claims");
+
+ // Construct the JWT itself
+ let signer = ES256
+ .signer_from_jwk(&jwk)
+ .expect("unable to convert jwk to jwt signer");
+ let jwt = jwt::encode_with_signer(&payload, &header, &signer)
+ .expect("unable to create and sign jwt");
+ println!("{jwt}");
+ }
+ Commands::ParseProfile { profile } => {
+ // Get the profile JWT
+ let mut jwt_bytes = Vec::new();
+ if profile == "-" {
+ std::io::stdin()
+ .read_to_end(&mut jwt_bytes)
+ .expect("unable to read from stdin");
+ } else {
+ File::open(profile)
+ .expect("unable to open jwt file")
+ .read_to_end(&mut jwt_bytes)
+ .expect("unable to read jwt file");
+ };
+ // Strip newlines
+ let jwt_bytes = jwt_bytes.strip_suffix(&[10]).unwrap_or(&jwt_bytes[..]);
+
+ // Parse the header of the JWT in order to fetch the JWK from it
+ let header = jwt::decode_header(jwt_bytes).expect("unable to decode header");
+ let jwk = Jwk::from_map(
+ header
+ .claim("jwk")
+ .expect("jwt does not have key embedded")
+ .as_object()
+ .expect("embedded jwk is not object type")
+ .clone(),
+ )
+ .expect("unable to parse embedded jwk");
+
+ // Parse and verify the JWT
+ let verifier = ES256
+ .verifier_from_jwk(&jwk)
+ .expect("unable to create verifier from jwk");
+ let (payload, _) = jwt::decode_with_verifier(&jwt_bytes, &verifier)
+ .expect("unable to parse and verify jwt");
+
+ let claims: AspClaims =
+ serde_json::from_value(serde_json::Value::Object(payload.claims_set().clone()))
+ .expect("unable to deserialize jwt payload claims");
+
+ printdoc! {
+ "
+ Profile fingerprint: {fingerprint}
+ Profile version: {version}
+
+ Name: {name}
+ Email: {email}
+ Avatar url: {avatar_url}
+ Description:
+ | {description}
+ Color: {color}
+ Claims:
+ {claims_formatted}
+ ",
+ fingerprint = jwk.fingerprint(),
+ version = claims.version,
+ name = claims.name,
+ description = claims.description.unwrap_or("N/A".to_string()),
+ email = claims.email.unwrap_or("N/A".to_string()),
+ avatar_url = claims.avatar_url.unwrap_or("N/A".to_string()),
+ color = claims.color.unwrap_or("N/A".to_string()),
+ claims_formatted = claims.claims.iter().map(|claim| format!("- {claim}")).collect::<Vec<String>>().join("\n")
+ }
+ }
+ }
+}
diff --git a/src/structs.rs b/src/structs.rs
new file mode 100644
index 0000000..b6ba2f4
--- /dev/null
+++ b/src/structs.rs
@@ -0,0 +1,31 @@
+use serde::{Deserialize, Serialize};
+
+#[derive(Serialize, Deserialize, Debug)]
+#[serde(rename_all = "camelCase")]
+pub enum AspType {
+ Profile,
+}
+
+#[derive(Serialize, Deserialize, Debug)]
+pub struct AspClaims {
+ #[serde(rename = "http://ariadne.id/version")]
+ pub version: u8,
+ #[serde(rename = "http://ariadne.id/type")]
+ pub r#type: AspType,
+ #[serde(rename = "http://ariadne.id/name")]
+ pub name: String,
+ #[serde(rename = "http://ariadne.id/claims")]
+ pub claims: Vec<String>,
+ #[serde(rename = "http://ariadne.id/description")]
+ pub description: Option<String>,
+ #[serde(rename = "http://ariadne.id/avatar_url")]
+ pub avatar_url: Option<String>,
+ #[serde(rename = "http://ariadne.id/email")]
+ pub email: Option<String>,
+ #[serde(rename = "http://ariadne.id/color")]
+ pub color: Option<String>,
+}
+
+pub trait JwkExt {
+ fn fingerprint(&self) -> String;
+}