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 */ 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 */ 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 */ 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 64 void *ex_data_dup(void *data) { 65 char* keyhandle = reinterpret_cast<char*>(data); 66 return strdup(keyhandle); 67 } 68 69 void ex_data_free(void *data) { 70 char* keyhandle = reinterpret_cast<char*>(data); 71 free(keyhandle); 72 } 73 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
