Merge pull request #6 from Akanoa/add-generate-public-key-from-private

Expose Public Key derivation

.gitignore

@@ -1 +1,2 @@
 /target
+.idea

Cargo.toml

@@ -11,7 +11,7 @@ crate-type = ["cdylib", "rlib"]
 
 [dependencies]
 wasm-bindgen = { version = "0.2.67", features = ["serde-serialize"] }
-biscuit-auth = { git = "https://github.com/biscuit-auth/biscuit-rust", branch = "master", features = ["wasm", "serde-error"] }
+biscuit-auth = { git = "https://github.com/biscuit-auth/biscuit-rust", branch = "main", features = ["wasm", "serde-error"] }
 biscuit-parser= { git = "https://github.com/biscuit-auth/biscuit-rust", branch = "master", features = ["serde-error"] }
 rand = "0.7"
 log = "0.4"

src/execute_serialized.rs

@@ -71,7 +71,7 @@ pub fn execute_inner(query: BiscuitQuery) -> Result<BiscuitResult, ExecuteErrors
 
     let deser: Result<Biscuit, error::Token> = public_key
         .clone()
-        .and_then(|pk| Biscuit::from_base64(&query.token, |_| pk));
+        .and_then(|pk| Biscuit::from_base64(&query.token, pk));
 
     let authorizer = parse_authorizer(&query.authorizer_code);
 

src/generate_token.rs

@@ -20,6 +20,7 @@ pub struct GenerateToken {
 pub enum GenerateTokenError {
     Parse(ParseErrors),
     Biscuit(error::Token),
+    KeyPairError(error::Format),
 }
 
 #[derive(Default, Debug, Clone, Serialize, Deserialize)]
@@ -39,6 +40,14 @@ pub fn generate_keypair() -> JsValue {
     .unwrap()
 }
 
+#[wasm_bindgen]
+pub fn get_public_key(private_key: String) -> Result<String, JsValue> {
+    let private = PrivateKey::from_bytes_hex(private_key.as_str())
+        .map_err(|err| JsValue::from_serde(&GenerateTokenError::KeyPairError(err)).unwrap())?;
+    let public = private.public();
+    Ok(public.to_bytes_hex())
+}
+
 #[wasm_bindgen]
 pub fn generate_token(query: &JsValue) -> Result<String, JsValue> {
     let query: GenerateToken = query.into_serde().unwrap();