pub unsafe extern "C" fn PK11_UnwrapSymKey(
wrappingKey: *mut PK11SymKey,
wrapType: CK_MECHANISM_TYPE,
param: *mut SECItem,
wrappedKey: *mut SECItem,
target: CK_MECHANISM_TYPE,
operation: CK_ATTRIBUTE_TYPE,
keySize: c_int,
) -> *mut PK11SymKey