From f6c27bf55dd9dd551e110055244582367d16c05c Mon Sep 17 00:00:00 2001
From: Kareem <kareem@wolfssl.com>
Date: Wed, 22 Apr 2026 16:19:41 -0700
Subject: [PATCH] Wrap _delete/_copy class attrs in staticmethod so self isn't
 bound as an extra arg.

Fixes #108.
---
 wolfcrypt/ciphers.py | 10 +++++-----
 wolfcrypt/hashes.py  | 18 +++++++++---------
 wolfcrypt/random.py  |  2 +-
 3 files changed, 15 insertions(+), 15 deletions(-)

diff --git a/wolfcrypt/ciphers.py b/wolfcrypt/ciphers.py
index 77ea987..4027065 100644
--- a/wolfcrypt/ciphers.py
+++ b/wolfcrypt/ciphers.py
@@ -397,7 +397,7 @@ if _lib.AESGCM_STREAM_ENABLED:
         _key_sizes = [16, 24, 32]
         _native_type = "Aes *"
         # making sure _lib.wc_AesFree outlives Aes instances
-        _delete = _lib.wc_AesFree
+        _delete = staticmethod(_lib.wc_AesFree)
 
         def __init__(self, key, IV, tag_bytes=16):
             """
@@ -698,7 +698,7 @@ if _lib.RSA_ENABLED:
                     raise WolfCryptError("Key initialization error (%d)" % ret)
 
         # making sure _lib.wc_FreeRsaKey outlives RsaKey instances
-        _delete = _lib.wc_FreeRsaKey
+        _delete = staticmethod(_lib.wc_FreeRsaKey)
 
         def __del__(self):
             if self.native_object:
@@ -1057,7 +1057,7 @@ if _lib.ECC_ENABLED:
                 raise WolfCryptError("Invalid key error (%d)" % ret)
 
         # making sure _lib.wc_ecc_free outlives ecc_key instances
-        _delete = _lib.wc_ecc_free
+        _delete = staticmethod(_lib.wc_ecc_free)
 
         def __del__(self):
             if self.native_object:
@@ -1423,7 +1423,7 @@ if _lib.ED25519_ENABLED:
                 raise WolfCryptError("Invalid key error (%d)" % ret)
 
         # making sure _lib.wc_ed25519_free outlives ed25519_key instances
-        _delete = _lib.wc_ed25519_free
+        _delete = staticmethod(_lib.wc_ed25519_free)
 
         def __del__(self):
             if self.native_object:
@@ -1623,7 +1623,7 @@ if _lib.ED448_ENABLED:
                 raise WolfCryptError("Invalid key error (%d)" % ret)
 
         # making sure _lib.wc_ed448_free outlives ed448_key instances
-        _delete = _lib.wc_ed448_free
+        _delete = staticmethod(_lib.wc_ed448_free)
 
         def __del__(self):
             if self.native_object:
diff --git a/wolfcrypt/hashes.py b/wolfcrypt/hashes.py
index 92adac3..d4a3d19 100644
--- a/wolfcrypt/hashes.py
+++ b/wolfcrypt/hashes.py
@@ -157,8 +157,8 @@ if _lib.SHA_ENABLED:
         digest_size = 20
         _native_type = "wc_Sha *"
         _native_size = _ffi.sizeof("wc_Sha")
-        _delete = _lib.wc_ShaFree
-        _copy = _lib.wc_ShaCopy
+        _delete = staticmethod(_lib.wc_ShaFree)
+        _copy = staticmethod(_lib.wc_ShaCopy)
 
         def __del__(self):
             if hasattr(self, '_native_object') and not getattr(self, '_shallow_copy', False):
@@ -185,8 +185,8 @@ if _lib.SHA256_ENABLED:
         digest_size = 32
         _native_type = "wc_Sha256 *"
         _native_size = _ffi.sizeof("wc_Sha256")
-        _delete = _lib.wc_Sha256Free
-        _copy = _lib.wc_Sha256Copy
+        _delete = staticmethod(_lib.wc_Sha256Free)
+        _copy = staticmethod(_lib.wc_Sha256Copy)
 
         def __del__(self):
             if hasattr(self, '_native_object') and not getattr(self, '_shallow_copy', False):
@@ -213,8 +213,8 @@ if _lib.SHA384_ENABLED:
         digest_size = 48
         _native_type = "wc_Sha384 *"
         _native_size = _ffi.sizeof("wc_Sha384")
-        _delete = _lib.wc_Sha384Free
-        _copy = _lib.wc_Sha384Copy
+        _delete = staticmethod(_lib.wc_Sha384Free)
+        _copy = staticmethod(_lib.wc_Sha384Copy)
 
         def __del__(self):
             if hasattr(self, '_native_object') and not getattr(self, '_shallow_copy', False):
@@ -241,8 +241,8 @@ if _lib.SHA512_ENABLED:
         digest_size = 64
         _native_type = "wc_Sha512 *"
         _native_size = _ffi.sizeof("wc_Sha512")
-        _delete = _lib.wc_Sha512Free
-        _copy = _lib.wc_Sha512Copy
+        _delete = staticmethod(_lib.wc_Sha512Free)
+        _copy = staticmethod(_lib.wc_Sha512Copy)
 
         def __del__(self):
             if hasattr(self, '_native_object') and not getattr(self, '_shallow_copy', False):
@@ -403,7 +403,7 @@ if _lib.HMAC_ENABLED:
         digest_size = None
         _native_type = "Hmac *"
         _native_size = _ffi.sizeof("Hmac")
-        _delete = _lib.wc_HmacFree
+        _delete = staticmethod(_lib.wc_HmacFree)
 
         def __del__(self):
             if hasattr(self, '_native_object') and not getattr(self, '_shallow_copy', False):
diff --git a/wolfcrypt/random.py b/wolfcrypt/random.py
index 17d3ae7..7525eae 100644
--- a/wolfcrypt/random.py
+++ b/wolfcrypt/random.py
@@ -44,7 +44,7 @@ class Random:
             raise WolfCryptError("RNG init error (%d)" % ret)
 
     # making sure _lib.wc_FreeRng outlives WC_RNG instances
-    _delete = _lib.wc_FreeRng
+    _delete = staticmethod(_lib.wc_FreeRng)
 
     def __del__(self):
         if self.native_object: