# define EVP_CTRL_SSL3_MASTER_SECRET 0x1d
+/* EVP_CTRL_SET_SBOX takes the char * specifying S-boxes */
+# define EVP_CTRL_SET_SBOX 0x1d
+/*
+ * EVP_CTRL_SBOX_USED takes a 'size_t' and 'char *', pointing at a
+ * pre-allocated buffer with specified size
+ */
+# define EVP_CTRL_SBOX_USED 0x1e
+/* EVP_CTRL_KEY_MESH takes 'size_t' number of bytes to mesh the key after,
+ * 0 switches meshing off
+ */
+# define EVP_CTRL_KEY_MESH 0x1f
+/* EVP_CTRL_BLOCK_PADDING_MODE takes the padding mode */
+# define EVP_CTRL_BLOCK_PADDING_MODE 0x20
+
+/* Padding modes */
+#define EVP_PADDING_PKCS7 1
+#define EVP_PADDING_ISO7816_4 2
+#define EVP_PADDING_ANSI923 3
+#define EVP_PADDING_ISO10126 4
+#define EVP_PADDING_ZERO 5
+
/* RFC 5246 defines additional data to be 13 bytes in length */
# define EVP_AEAD_TLS1_AAD_LEN 13