/* * cc_clear.c * corecrypto * * Created on 05/21/2014 * * Copyright (c) 2014,2015 Apple Inc. All rights reserved. * * * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in * compliance with the License. The rights granted to you under the License * may not be used to create, or enable the creation or redistribution of, * unlawful or unlicensed copies of an Apple operating system, or to * circumvent, violate, or enable the circumvention or violation of, any * terms of an Apple operating system software license agreement. * * Please obtain a copy of the License at * http://www.opensource.apple.com/apsl/ and read it before using this file. * * The Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. * * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ */ #include <corecrypto/cc.h> #include "corecrypto/fipspost_trace.h" #if (CC_HAS_MEMSET_S == 1) && (defined(__STDC_WANT_LIB_EXT1__) && (__STDC_WANT_LIB_EXT1__ == 1)) void cc_clear(size_t len, void *dst) { FIPSPOST_TRACE_EVENT; memset_s(dst, len, 0, len); } #elif defined(_WIN32) && !defined(__clang__) //Clang with Microsoft CodeGen, doesn't support SecureZeroMemory #include <windows.h> static void cc_clear(size_t len, void *dst) { SecureZeroMemory(dst, len); } #else void cc_clear(size_t len, void *dst) { FIPSPOST_TRACE_EVENT; volatile char *vptr = (volatile char *)dst; while (len--) { *vptr++ = '\0'; } } #endif