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