1/* 2 * Copyright (c) 2000-2001,2011-2012,2014 Apple Inc. All Rights Reserved. 3 * 4 * The contents of this file constitute Original Code as defined in and are 5 * subject to the Apple Public Source License Version 1.2 (the 'License'). 6 * You may not use this file except in compliance with the License. Please obtain 7 * a copy of the License at http://www.apple.com/publicsource and read it before 8 * using this file. 9 * 10 * This Original Code and all software distributed under the License are 11 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS 12 * OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, INCLUDING WITHOUT 13 * LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR 14 * PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. Please see the License for the 15 * specific language governing rights and limitations under the License. 16 */ 17 18 19/* crypto/buffer/buffer.c */ 20/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 21 * All rights reserved. 22 * 23 * This package is an SSL implementation written 24 * by Eric Young (eay@cryptsoft.com). 25 * The implementation was written so as to conform with Netscapes SSL. 26 * 27 * This library is free for commercial and non-commercial use as long as 28 * the following conditions are aheared to. The following conditions 29 * apply to all code found in this distribution, be it the RC4, RSA, 30 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 31 * included with this distribution is covered by the same copyright terms 32 * except that the holder is Tim Hudson (tjh@cryptsoft.com). 33 * 34 * Copyright remains Eric Young's, and as such any Copyright notices in 35 * the code are not to be removed. 36 * If this package is used in a product, Eric Young should be given attribution 37 * as the author of the parts of the library used. 38 * This can be in the form of a textual message at program startup or 39 * in documentation (online or textual) provided with the package. 40 * 41 * Redistribution and use in source and binary forms, with or without 42 * modification, are permitted provided that the following conditions 43 * are met: 44 * 1. Redistributions of source code must retain the copyright 45 * notice, this list of conditions and the following disclaimer. 46 * 2. Redistributions in binary form must reproduce the above copyright 47 * notice, this list of conditions and the following disclaimer in the 48 * documentation and/or other materials provided with the distribution. 49 * 3. All advertising materials mentioning features or use of this software 50 * must display the following acknowledgement: 51 * "This product includes cryptographic software written by 52 * Eric Young (eay@cryptsoft.com)" 53 * The word 'cryptographic' can be left out if the rouines from the library 54 * being used are not cryptographic related :-). 55 * 4. If you include any Windows specific code (or a derivative thereof) from 56 * the apps directory (application code) you must include an acknowledgement: 57 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 58 * 59 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 60 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 61 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 62 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 63 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 64 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 65 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 66 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 67 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 68 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 69 * SUCH DAMAGE. 70 * 71 * The licence and distribution terms for any publically available version or 72 * derivative of this code cannot be changed. i.e. this code cannot simply be 73 * copied and put under another distribution licence 74 * [including the GNU Public Licence.] 75 */ 76 77#include <stdio.h> 78#include "cryptlib.h" 79#include <openssl/buffer.h> 80 81BUF_MEM *BUF_MEM_new(void) 82 { 83 BUF_MEM *ret; 84 85 ret=Malloc(sizeof(BUF_MEM)); 86 if (ret == NULL) 87 { 88 BUFerr(BUF_F_BUF_MEM_NEW,ERR_R_MALLOC_FAILURE); 89 return(NULL); 90 } 91 ret->length=0; 92 ret->max=0; 93 ret->data=NULL; 94 return(ret); 95 } 96 97void BUF_MEM_free(BUF_MEM *a) 98 { 99 if(a == NULL) 100 return; 101 102 if (a->data != NULL) 103 { 104 memset(a->data,0,(unsigned int)a->max); 105 Free(a->data); 106 } 107 Free(a); 108 } 109 110int BUF_MEM_grow(BUF_MEM *str, int len) 111 { 112 char *ret; 113 unsigned int n; 114 115 if (str->length >= len) 116 { 117 str->length=len; 118 return(len); 119 } 120 if (str->max >= len) 121 { 122 memset(&str->data[str->length],0,len-str->length); 123 str->length=len; 124 return(len); 125 } 126 n=(len+3)/3*4; 127 if (str->data == NULL) 128 ret=Malloc(n); 129 else 130 ret=Realloc(str->data,n); 131 if (ret == NULL) 132 { 133 BUFerr(BUF_F_BUF_MEM_GROW,ERR_R_MALLOC_FAILURE); 134 len=0; 135 } 136 else 137 { 138 str->data=ret; 139 str->length=len; 140 str->max=n; 141 } 142 return(len); 143 } 144 145char *BUF_strdup(const char *str) 146 { 147 char *ret; 148 size_t n; 149 150 if (str == NULL) return(NULL); 151 152 n=strlen(str); 153 ret=Malloc(n+1); 154 if (ret == NULL) 155 { 156 BUFerr(BUF_F_BUF_STRDUP,ERR_R_MALLOC_FAILURE); 157 return(NULL); 158 } 159 memcpy(ret,str,n+1); 160 return(ret); 161 } 162 163