1 /*
2 * Copyright 2012 The Android Open Source Project
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
15 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
16 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY
17 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
18 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
19 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
20 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
22 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
23 *
24 */
25
26 #include <openssl/engine.h>
27
28 #include <string.h>
29
30 /**
31 * Makes sure the ex_data for the keyhandle is initially set to NULL.
32 */
keyhandle_new(void *,void *,CRYPTO_EX_DATA * ad,int idx,long,void *)33 int keyhandle_new(void*, void*, CRYPTO_EX_DATA* ad, int idx, long, void*) {
34 return CRYPTO_set_ex_data(ad, idx, NULL);
35 }
36
37 /**
38 * Frees a previously allocated keyhandle stored in ex_data.
39 */
keyhandle_free(void *,void * ptr,CRYPTO_EX_DATA *,int,long,void *)40 void keyhandle_free(void *, void *ptr, CRYPTO_EX_DATA*, int, long, void*) {
41 char* keyhandle = reinterpret_cast<char*>(ptr);
42 if (keyhandle != NULL) {
43 free(keyhandle);
44 }
45 }
46
47 /**
48 * Duplicates a keyhandle stored in ex_data in case we copy a key.
49 */
keyhandle_dup(CRYPTO_EX_DATA * to,CRYPTO_EX_DATA *,void * ptrRef,int idx,long,void *)50 int keyhandle_dup(CRYPTO_EX_DATA* to, CRYPTO_EX_DATA*, void *ptrRef, int idx, long, void *) {
51 // This appears to be a bug in OpenSSL.
52 void** ptr = reinterpret_cast<void**>(ptrRef);
53 char* keyhandle = reinterpret_cast<char*>(*ptr);
54 if (keyhandle != NULL) {
55 char* keyhandle_copy = strdup(keyhandle);
56 *ptr = keyhandle_copy;
57
58 // Call this in case OpenSSL is fixed in the future.
59 (void) CRYPTO_set_ex_data(to, idx, keyhandle_copy);
60 }
61 return 1;
62 }
63
ex_data_dup(void * data)64 void *ex_data_dup(void *data) {
65 char* keyhandle = reinterpret_cast<char*>(data);
66 return strdup(keyhandle);
67 }
68
ex_data_free(void * data)69 void ex_data_free(void *data) {
70 char* keyhandle = reinterpret_cast<char*>(data);
71 free(keyhandle);
72 }
73
ex_data_clear_free(void * data)74 void ex_data_clear_free(void *data) {
75 char* keyhandle = reinterpret_cast<char*>(data);
76 memset(data, '\0', strlen(keyhandle));
77 free(keyhandle);
78 }
79