|
1 /* crypto/mem_clr.c -*- mode:C; c-file-style: "eay" -*- */ |
|
2 /* Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL |
|
3 * project 2002. |
|
4 */ |
|
5 /* ==================================================================== |
|
6 * Copyright (c) 2001 The OpenSSL Project. All rights reserved. |
|
7 * |
|
8 * Redistribution and use in source and binary forms, with or without |
|
9 * modification, are permitted provided that the following conditions |
|
10 * are met: |
|
11 * |
|
12 * 1. Redistributions of source code must retain the above copyright |
|
13 * notice, this list of conditions and the following disclaimer. |
|
14 * |
|
15 * 2. Redistributions in binary form must reproduce the above copyright |
|
16 * notice, this list of conditions and the following disclaimer in |
|
17 * the documentation and/or other materials provided with the |
|
18 * distribution. |
|
19 * |
|
20 * 3. All advertising materials mentioning features or use of this |
|
21 * software must display the following acknowledgment: |
|
22 * "This product includes software developed by the OpenSSL Project |
|
23 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" |
|
24 * |
|
25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to |
|
26 * endorse or promote products derived from this software without |
|
27 * prior written permission. For written permission, please contact |
|
28 * openssl-core@openssl.org. |
|
29 * |
|
30 * 5. Products derived from this software may not be called "OpenSSL" |
|
31 * nor may "OpenSSL" appear in their names without prior written |
|
32 * permission of the OpenSSL Project. |
|
33 * |
|
34 * 6. Redistributions of any form whatsoever must retain the following |
|
35 * acknowledgment: |
|
36 * "This product includes software developed by the OpenSSL Project |
|
37 * for use in the OpenSSL Toolkit (http://www.openssl.org/)" |
|
38 * |
|
39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY |
|
40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
|
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
|
42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR |
|
43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
|
44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
|
45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
|
46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
|
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
|
48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
|
49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
|
50 * OF THE POSSIBILITY OF SUCH DAMAGE. |
|
51 * ==================================================================== |
|
52 * |
|
53 * This product includes cryptographic software written by Eric Young |
|
54 * (eay@cryptsoft.com). This product includes software written by Tim |
|
55 * Hudson (tjh@cryptsoft.com). |
|
56 * |
|
57 */ |
|
58 /* |
|
59 © Portions copyright (c) 2006 Nokia Corporation. All rights reserved. |
|
60 */ |
|
61 |
|
62 |
|
63 #include <string.h> |
|
64 #include <openssl/crypto.h> |
|
65 #if (defined(SYMBIAN) && (defined(__WINSCW__) || defined(__WINS__))) |
|
66 #include "libcrypto_wsd_macros.h" |
|
67 #include "libcrypto_wsd.h" |
|
68 #endif |
|
69 |
|
70 #ifndef EMULATOR |
|
71 unsigned char cleanse_ctr = 0; |
|
72 #else |
|
73 GET_GLOBAL_VAR_FROM_TLS(cleanse_ctr,mem_clr, unsigned char) |
|
74 #define cleanse_ctr (*GET_WSD_VAR_NAME(cleanse_ctr,mem_clr, g)()) |
|
75 #endif |
|
76 |
|
77 EXPORT_C void OPENSSL_cleanse(void *ptr, size_t len) |
|
78 { |
|
79 unsigned char *p = ptr; |
|
80 size_t loop = len, ctr = cleanse_ctr; |
|
81 while(loop--) |
|
82 { |
|
83 *(p++) = (unsigned char)ctr; |
|
84 ctr += (17 + ((size_t)p & 0xF)); |
|
85 } |
|
86 p=memchr(ptr, (unsigned char)ctr, len); |
|
87 if(p) |
|
88 ctr += (63 + (size_t)p); |
|
89 cleanse_ctr = (unsigned char)ctr; |
|
90 } |