fix: algorithm transformation & decode header fn

Author: tada5hi

packages/jsonwebtoken/src/algorithm.rs

@@ -48,6 +48,26 @@ impl From<Algorithm> for jsonwebtoken::Algorithm {
   }
 }
 
+impl From<jsonwebtoken::Algorithm> for Algorithm {
+  #[inline]
+  fn from(value: jsonwebtoken::Algorithm) -> Self {
+    match value {
+      jsonwebtoken::Algorithm::ES256 => Algorithm::ES256,
+      jsonwebtoken::Algorithm::ES384 => Algorithm::ES384,
+      jsonwebtoken::Algorithm::EdDSA => Algorithm::EdDSA,
+      jsonwebtoken::Algorithm::HS256 => Algorithm::HS256,
+      jsonwebtoken::Algorithm::HS384  => Algorithm::HS384,
+      jsonwebtoken::Algorithm::HS512 => Algorithm::HS512,
+      jsonwebtoken::Algorithm::PS256 => Algorithm::PS256,
+      jsonwebtoken::Algorithm::PS384 => Algorithm::PS384,
+      jsonwebtoken::Algorithm::PS512 => Algorithm::PS512,
+      jsonwebtoken::Algorithm::RS256 => Algorithm::RS256,
+      jsonwebtoken::Algorithm::RS384 => Algorithm::RS384,
+      jsonwebtoken::Algorithm::RS512 => Algorithm::RS512,
+    }
+  }
+}
+
 impl Default for Algorithm {
   fn default() -> Self {
     Self::HS256

packages/jsonwebtoken/src/decode.rs

@@ -3,8 +3,9 @@ use napi_derive::napi;
 use crate::header::Header;
 
 #[napi]
-pub fn decode_header(token: &str) -> Header {
+pub fn decode_header(token: String) -> Header {
   let result = jsonwebtoken::decode_header(&token);
 
-  let header = Header::from(result.unwrap());
+  let header = result.unwrap().into();
+  return header;
 }

packages/jsonwebtoken/src/header.rs

@@ -73,11 +73,11 @@ impl From<&Header> for jsonwebtoken::Header {
   }
 }
 
-impl From<&jsonwebtoken::Header> for Header {
+impl From<jsonwebtoken::Header> for Header {
   #[inline]
-  fn from(value: &jsonwebtoken::Header) -> Header {
+  fn from(value: jsonwebtoken::Header) -> Header {
     Header {
-      algorithm: value.alg.clone(),
+      algorithm: Algorithm::from(value.alg.clone()).into(),
       content_type: value.cty.clone(),
       json_key_url: value.jku.clone(),
       key_id: value.kid.clone(),