Update src/cryptojwt/jwk/hmac.py

Co-authored-by: Giuseppe De Marco <demarcog83@gmail.com>

Author: jschlyter

src/cryptojwt/jwk/hmac.py

@@ -62,8 +62,10 @@ def __init__(
         elif self.key and not self.k:
             self.k = b64e(self.key)
 
-        if self.k and self.key and self.k != b64e(self.key):
-            raise JWKException("k and key don't match")
+        if self.k and self.key:
+            _k_bytes = self.k.encode("utf-8") if isinstance(self.k, str) else self.k
+            if _k_bytes != b64e(self.key):
+                raise JWKException("k and key don't match")
 
         if len(self.key) < 16:
             raise UnsupportedAlgorithm("client_secret too short, it should be at least 16 digits")