-# define DECLARE_AES_EVP(ksize,lmode,umode) \
-static const EVP_CIPHER padlock_aes_##ksize##_##lmode = { \
- NID_aes_##ksize##_##lmode, \
- EVP_CIPHER_block_size_##umode, \
- AES_KEY_SIZE_##ksize, \
- AES_BLOCK_SIZE, \
- 0 | EVP_CIPH_##umode##_MODE, \
- padlock_aes_init_key, \
- padlock_##lmode##_cipher, \
- NULL, \
- sizeof(struct padlock_cipher_data) + 16, \
- EVP_CIPHER_set_asn1_iv, \
- EVP_CIPHER_get_asn1_iv, \
- NULL, \
- NULL \
+# define DECLARE_AES_EVP(ksize,lmode,umode) \
+static EVP_CIPHER *_hidden_aes_##ksize##_##lmode = NULL; \
+static const EVP_CIPHER *padlock_aes_##ksize##_##lmode(void) \
+{ \
+ if (_hidden_aes_##ksize##_##lmode == NULL \
+ && ((_hidden_aes_##ksize##_##lmode = \
+ EVP_CIPHER_meth_new(NID_aes_##ksize##_##lmode, \
+ EVP_CIPHER_block_size_##umode, \
+ AES_KEY_SIZE_##ksize)) == NULL \
+ || !EVP_CIPHER_meth_set_iv_length(_hidden_aes_##ksize##_##lmode, \
+ AES_BLOCK_SIZE) \
+ || !EVP_CIPHER_meth_set_flags(_hidden_aes_##ksize##_##lmode, \
+ 0 | EVP_CIPH_##umode##_MODE) \
+ || !EVP_CIPHER_meth_set_init(_hidden_aes_##ksize##_##lmode, \
+ padlock_aes_init_key) \
+ || !EVP_CIPHER_meth_set_do_cipher(_hidden_aes_##ksize##_##lmode, \
+ padlock_##lmode##_cipher) \
+ || !EVP_CIPHER_meth_set_impl_ctx_size(_hidden_aes_##ksize##_##lmode, \
+ sizeof(struct padlock_cipher_data) + 16) \
+ || !EVP_CIPHER_meth_set_set_asn1_params(_hidden_aes_##ksize##_##lmode, \
+ EVP_CIPHER_set_asn1_iv) \
+ || !EVP_CIPHER_meth_set_get_asn1_params(_hidden_aes_##ksize##_##lmode, \
+ EVP_CIPHER_get_asn1_iv))) { \
+ EVP_CIPHER_meth_free(_hidden_aes_##ksize##_##lmode); \
+ _hidden_aes_##ksize##_##lmode = NULL; \
+ } \
+ return _hidden_aes_##ksize##_##lmode; \