projects / apple / xnu.git / blame
| Commit | Line | Data |
|---|---|---|
| 3e170ce0 A |
1 | /* |
| 2 | * cc_clear.c | |
| 3 | * corecrypto | |
| 4 | * | |
| 5 | * Created on 05/21/2014 | |
| 6 | * | |
| 7 | * Copyright (c) 2014,2015 Apple Inc. All rights reserved. | |
| 8 | * | |
| 5ba3f43e A |
9 | * |
| 10 | * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ | |
| 11 | * | |
| 12 | * This file contains Original Code and/or Modifications of Original Code | |
| 13 | * as defined in and that are subject to the Apple Public Source License | |
| 14 | * Version 2.0 (the 'License'). You may not use this file except in | |
| 15 | * compliance with the License. The rights granted to you under the License | |
| 16 | * may not be used to create, or enable the creation or redistribution of, | |
| 17 | * unlawful or unlicensed copies of an Apple operating system, or to | |
| 18 | * circumvent, violate, or enable the circumvention or violation of, any | |
| 19 | * terms of an Apple operating system software license agreement. | |
| 20 | * | |
| 21 | * Please obtain a copy of the License at | |
| 22 | * http://www.opensource.apple.com/apsl/ and read it before using this file. | |
| 23 | * | |
| 24 | * The Original Code and all software distributed under the License are | |
| 25 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER | |
| 26 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, | |
| 27 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, | |
| 28 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. | |
| 29 | * Please see the License for the specific language governing rights and | |
| 30 | * limitations under the License. | |
| 31 | * | |
| 32 | * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ | |
| 3e170ce0 A |
33 | */ |
| 34 | ||
| 35 | #include <corecrypto/cc.h> | |
| 5ba3f43e | 36 | #include "corecrypto/fipspost_trace.h" |
| 3e170ce0 | 37 | |
| 39037602 A |
38 | //rdar://problem/26986552 |
| 39 | ||
| 0a7de745 A |
40 | #if (CC_HAS_MEMSET_S == 1) && (defined(__STDC_WANT_LIB_EXT1__) && (__STDC_WANT_LIB_EXT1__ == 1)) |
| 41 | void | |
| 42 | cc_clear(size_t len, void *dst) | |
| 3e170ce0 | 43 | { |
| 0a7de745 A |
44 | FIPSPOST_TRACE_EVENT; |
| 45 | memset_s(dst, len, 0, len); | |
| 39037602 A |
46 | } |
| 47 | #elif defined(_WIN32) && !defined(__clang__) //Clang with Microsoft CodeGen, doesn't support SecureZeroMemory | |
| 48 | #include <windows.h> | |
| 0a7de745 A |
49 | static void |
| 50 | cc_clear(size_t len, void *dst) | |
| 39037602 | 51 | { |
| 0a7de745 | 52 | SecureZeroMemory(dst, len); |
| 39037602 | 53 | } |
| 3e170ce0 | 54 | #else |
| 0a7de745 A |
55 | void |
| 56 | cc_clear(size_t len, void *dst) | |
| 39037602 | 57 | { |
| 0a7de745 A |
58 | FIPSPOST_TRACE_EVENT; |
| 59 | volatile char *vptr = (volatile char *)dst; | |
| 60 | while (len--) { | |
| 61 | *vptr++ = '\0'; | |
| 62 | } | |
| 3e170ce0 | 63 | } |
| 39037602 | 64 | #endif |
| 3e170ce0 | 65 | |
| 39037602 | 66 | /* This is an altarnative for clang that should work |
| 0a7de745 A |
67 | * void cc_clear(size_t len, void *dst) __attribute__ ((optnone)) |
| 68 | * { | |
| cb323159 | 69 | * cc_clear(len,dst); |
| 0a7de745 A |
70 | * } |
| 71 | */ |