Implement TryFrom &Jwk for DecodingKey

Author: tottoto

examples/auth0.rs

@@ -21,8 +21,6 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
         return Err("No matching JWK found for the given kid".into());
     };
 
-    let decoding_key = DecodingKey::from_jwk(jwk)?;
-
     let validation = {
         let mut validation = Validation::new(header.alg);
         validation.set_audience(&["https://dev-duzyayk4.eu.auth0.com/api/v2/"]);
@@ -31,7 +29,7 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
     };
 
     let decoded_token =
-        decode::<HashMap<String, serde_json::Value>>(TOKEN, &decoding_key, &validation)?;
+        decode::<HashMap<String, serde_json::Value>>(TOKEN, &jwk.try_into()?, &validation)?;
 
     println!("{:#?}", decoded_token);
 

src/decoding.rs

@@ -251,6 +251,14 @@ impl DecodingKey {
     }
 }
 
+impl TryFrom<&Jwk> for DecodingKey {
+    type Error = crate::errors::Error;
+
+    fn try_from(jwk: &Jwk) -> Result<Self> {
+        Self::from_jwk(jwk)
+    }
+}
+
 /// Decode and validate a JWT
 ///
 /// If the token or its signature is invalid or the claims fail validation, it will return an error.