did:ion (Sidetree) resolver and client

Cargo.toml

@@ -13,8 +13,8 @@ exclude = ["json-ld-api/*", "json-ld-normalization/*"]
 
 [features]
 default = ["ring"]
-http-did = ["hyper", "hyper-tls", "http", "percent-encoding", "tokio"]
-libsecp256k1 = ["secp256k1"]                                           # backward compatibility
+http-did = ["http", "percent-encoding"]
+libsecp256k1 = ["secp256k1"] # backward compatibility
 secp256k1 = ["k256", "rand", "k256/keccak256"]
 secp256r1 = ["p256", "rand"]
 aleosig = ["rand", "blake2", "snarkvm-dpc", "snarkvm-algorithms", "snarkvm-curves", "snarkvm-utilities", "snarkvm-parameters"]
@@ -57,13 +57,6 @@ lazy_static = "1.4"
 combination = "0.1"
 sha2 = { version = "0.9", optional = true }
 sha2_old = { package = "sha2", version = "0.8" }
-hyper = { version = "0.14", optional = true, features = [
-  "server",
-  "client",
-  "http1",
-  "stream",
-] }
-hyper-tls = { version = "0.5", optional = true }
 http = { version = "0.2", optional = true }
 hex = "0.4"
 serde_urlencoded = "0.7"
@@ -87,6 +80,7 @@ flate2 = "1.0"
 bitvec = "0.20"
 clear_on_drop = "0.2.4"
 url = { version = "2.2", features = ["serde"] }
+anyhow = "1.0"
 rand_xorshift = "0.3"
 bech32 = "0.8"
 snarkvm-dpc = { version = "0.7.9", optional = true }
@@ -112,6 +106,7 @@ members = [
   "did-sol",
   "did-pkh",
   "did-onion",
+  "did-ion",
   "did-webkey",
   "vc-test",
   "did-test",
@@ -123,6 +118,7 @@ uuid = { version = "0.8", features = ["v4", "serde"] }
 difference = "2.0"
 did-method-key = { path = "./did-key" }
 tokio = { version = "1.0", features = ["macros"] }
+hyper = { version = "0.14", features = ["server", "http1", "stream"] }
 
 [package.metadata.docs.rs]
 features = ["secp256r1", "secp256k1", "ripemd-160", "http-did"]

did-ion/Cargo.toml

@@ -0,0 +1,34 @@
+[package]
+name = "did-ion"
+version = "0.1.0"
+authors = ["Spruce Systems, Inc."]
+edition = "2021"
+license = "Apache-2.0"
+keywords = ["ssi", "did"]
+categories = ["web-programming::http-client"]
+description = "did:ion DID method implementation, using the ssi crate and ION/Sidetree REST API"
+repository = "https://github.com/spruceid/ssi/"
+homepage = "https://github.com/spruceid/ssi/tree/main/did-ion/"
+documentation = "https://docs.rs/did-ion/"
+
+[features]
+
+[dependencies]
+ssi = { version = "0.3", path = "../", default-features = false, features = ["http-did", "secp256k1"] }
+async-trait = "0.1"
+serde = { version = "1.0", features = ["derive"] }
+serde_json = "1.0"
+serde_jcs = "0.1"
+anyhow = "1.0"
+thiserror = "1.0"
+base64 = "0.12"
+sha2 = "0.10"
+json-patch = "0.2.6"
+reqwest = { version = "0.11", features = ["json"] }
+
+[target.'cfg(target_os = "android")'.dependencies.reqwest]
+version = "0.11"
+features = ["json", "native-tls-vendored"]
+
+[dev-dependencies]
+lazy_static = "1.4"

did-ion/README.md

@@ -0,0 +1,17 @@
+# did-ion
+
+Rust implementation of the [did:ion][] [DID Method][], based on the [ssi][] library.
+
+## Requirements
+
+An ION node is needed, that is a [Sidetree REST API][] provider. The URL for
+the ION/Sidetree node is to be stored in config TBD.
+
+## License
+
+[Apache License, Version 2.0](http://www.apache.org/licenses/)
+
+[did:ion]: https://identity.foundation/ion/
+[DID Method]: https://www.w3.org/TR/did-core/#methods
+[ssi]: https://github.com/spruceid/ssi/
+[Sidetree REST API]: https://identity.foundation/sidetree/api/

did-ion/src/lib.rs

@@ -0,0 +1,29 @@
+use anyhow::{anyhow, Context, Result};
+use ssi::jwk::{Algorithm, JWK};
+
+pub mod sidetree;
+
+use sidetree::{is_secp256k1, Sidetree, SidetreeClient, SidetreeError};
+
+pub struct ION;
+
+/// did:ion Method
+pub type DIDION = SidetreeClient<ION>;
+
+impl Sidetree for ION {
+    fn generate_key() -> Result<JWK, SidetreeError> {
+        let key = JWK::generate_secp256k1().context("Generate secp256k1 key")?;
+        Ok(key)
+    }
+
+    fn validate_key(key: &JWK) -> Result<(), SidetreeError> {
+        if !is_secp256k1(&key) {
+            return Err(anyhow!("Key must be Secp256k1").into());
+        }
+        Ok(())
+    }
+
+    const SIGNATURE_ALGORITHM: Algorithm = Algorithm::ES256K;
+    const METHOD: &'static str = "ion";
+    const NETWORK: Option<&'static str> = Some("test");
+}