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/**
29 * Makes sure the ex_data for the keyhandle is initially set to NULL.
30 */
31int keyhandle_new(void*, void*, CRYPTO_EX_DATA* ad, int idx, long, void*) {
32    return CRYPTO_set_ex_data(ad, idx, NULL);
33}
34
35/**
36 * Frees a previously allocated keyhandle stored in ex_data.
37 */
38void keyhandle_free(void *, void *ptr, CRYPTO_EX_DATA*, int, long, void*) {
39    char* keyhandle = reinterpret_cast<char*>(ptr);
40    if (keyhandle != NULL) {
41        free(keyhandle);
42    }
43}
44
45/**
46 * Duplicates a keyhandle stored in ex_data in case we copy a key.
47 */
48int keyhandle_dup(CRYPTO_EX_DATA* to, CRYPTO_EX_DATA*, void *ptrRef, int idx, long, void *) {
49    // This appears to be a bug in OpenSSL.
50    void** ptr = reinterpret_cast<void**>(ptrRef);
51    char* keyhandle = reinterpret_cast<char*>(*ptr);
52    if (keyhandle != NULL) {
53        char* keyhandle_copy = strdup(keyhandle);
54        *ptr = keyhandle_copy;
55
56        // Call this in case OpenSSL is fixed in the future.
57        (void) CRYPTO_set_ex_data(to, idx, keyhandle_copy);
58    }
59    return 1;
60}
61
62void *ex_data_dup(void *data) {
63    char* keyhandle = reinterpret_cast<char*>(data);
64    return strdup(keyhandle);
65}
66
67void ex_data_free(void *data) {
68    char* keyhandle = reinterpret_cast<char*>(data);
69    free(keyhandle);
70}
71
72void ex_data_clear_free(void *data) {
73    char* keyhandle = reinterpret_cast<char*>(data);
74    memset(data, '\0', strlen(keyhandle));
75    free(keyhandle);
76}
77