1*0Sstevel@tonic-gate /* crypto/buffer/buffer.c */
2*0Sstevel@tonic-gate /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3*0Sstevel@tonic-gate  * All rights reserved.
4*0Sstevel@tonic-gate  *
5*0Sstevel@tonic-gate  * This package is an SSL implementation written
6*0Sstevel@tonic-gate  * by Eric Young (eay@cryptsoft.com).
7*0Sstevel@tonic-gate  * The implementation was written so as to conform with Netscapes SSL.
8*0Sstevel@tonic-gate  *
9*0Sstevel@tonic-gate  * This library is free for commercial and non-commercial use as long as
10*0Sstevel@tonic-gate  * the following conditions are aheared to.  The following conditions
11*0Sstevel@tonic-gate  * apply to all code found in this distribution, be it the RC4, RSA,
12*0Sstevel@tonic-gate  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
13*0Sstevel@tonic-gate  * included with this distribution is covered by the same copyright terms
14*0Sstevel@tonic-gate  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15*0Sstevel@tonic-gate  *
16*0Sstevel@tonic-gate  * Copyright remains Eric Young's, and as such any Copyright notices in
17*0Sstevel@tonic-gate  * the code are not to be removed.
18*0Sstevel@tonic-gate  * If this package is used in a product, Eric Young should be given attribution
19*0Sstevel@tonic-gate  * as the author of the parts of the library used.
20*0Sstevel@tonic-gate  * This can be in the form of a textual message at program startup or
21*0Sstevel@tonic-gate  * in documentation (online or textual) provided with the package.
22*0Sstevel@tonic-gate  *
23*0Sstevel@tonic-gate  * Redistribution and use in source and binary forms, with or without
24*0Sstevel@tonic-gate  * modification, are permitted provided that the following conditions
25*0Sstevel@tonic-gate  * are met:
26*0Sstevel@tonic-gate  * 1. Redistributions of source code must retain the copyright
27*0Sstevel@tonic-gate  *    notice, this list of conditions and the following disclaimer.
28*0Sstevel@tonic-gate  * 2. Redistributions in binary form must reproduce the above copyright
29*0Sstevel@tonic-gate  *    notice, this list of conditions and the following disclaimer in the
30*0Sstevel@tonic-gate  *    documentation and/or other materials provided with the distribution.
31*0Sstevel@tonic-gate  * 3. All advertising materials mentioning features or use of this software
32*0Sstevel@tonic-gate  *    must display the following acknowledgement:
33*0Sstevel@tonic-gate  *    "This product includes cryptographic software written by
34*0Sstevel@tonic-gate  *     Eric Young (eay@cryptsoft.com)"
35*0Sstevel@tonic-gate  *    The word 'cryptographic' can be left out if the rouines from the library
36*0Sstevel@tonic-gate  *    being used are not cryptographic related :-).
37*0Sstevel@tonic-gate  * 4. If you include any Windows specific code (or a derivative thereof) from
38*0Sstevel@tonic-gate  *    the apps directory (application code) you must include an acknowledgement:
39*0Sstevel@tonic-gate  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40*0Sstevel@tonic-gate  *
41*0Sstevel@tonic-gate  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42*0Sstevel@tonic-gate  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43*0Sstevel@tonic-gate  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44*0Sstevel@tonic-gate  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45*0Sstevel@tonic-gate  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46*0Sstevel@tonic-gate  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47*0Sstevel@tonic-gate  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48*0Sstevel@tonic-gate  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49*0Sstevel@tonic-gate  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50*0Sstevel@tonic-gate  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51*0Sstevel@tonic-gate  * SUCH DAMAGE.
52*0Sstevel@tonic-gate  *
53*0Sstevel@tonic-gate  * The licence and distribution terms for any publically available version or
54*0Sstevel@tonic-gate  * derivative of this code cannot be changed.  i.e. this code cannot simply be
55*0Sstevel@tonic-gate  * copied and put under another distribution licence
56*0Sstevel@tonic-gate  * [including the GNU Public Licence.]
57*0Sstevel@tonic-gate  */
58*0Sstevel@tonic-gate 
59*0Sstevel@tonic-gate #include <stdio.h>
60*0Sstevel@tonic-gate #include "cryptlib.h"
61*0Sstevel@tonic-gate #include <openssl/buffer.h>
62*0Sstevel@tonic-gate 
63*0Sstevel@tonic-gate BUF_MEM *BUF_MEM_new(void)
64*0Sstevel@tonic-gate 	{
65*0Sstevel@tonic-gate 	BUF_MEM *ret;
66*0Sstevel@tonic-gate 
67*0Sstevel@tonic-gate 	ret=OPENSSL_malloc(sizeof(BUF_MEM));
68*0Sstevel@tonic-gate 	if (ret == NULL)
69*0Sstevel@tonic-gate 		{
70*0Sstevel@tonic-gate 		BUFerr(BUF_F_BUF_MEM_NEW,ERR_R_MALLOC_FAILURE);
71*0Sstevel@tonic-gate 		return(NULL);
72*0Sstevel@tonic-gate 		}
73*0Sstevel@tonic-gate 	ret->length=0;
74*0Sstevel@tonic-gate 	ret->max=0;
75*0Sstevel@tonic-gate 	ret->data=NULL;
76*0Sstevel@tonic-gate 	return(ret);
77*0Sstevel@tonic-gate 	}
78*0Sstevel@tonic-gate 
79*0Sstevel@tonic-gate void BUF_MEM_free(BUF_MEM *a)
80*0Sstevel@tonic-gate 	{
81*0Sstevel@tonic-gate 	if(a == NULL)
82*0Sstevel@tonic-gate 	    return;
83*0Sstevel@tonic-gate 
84*0Sstevel@tonic-gate 	if (a->data != NULL)
85*0Sstevel@tonic-gate 		{
86*0Sstevel@tonic-gate 		memset(a->data,0,(unsigned int)a->max);
87*0Sstevel@tonic-gate 		OPENSSL_free(a->data);
88*0Sstevel@tonic-gate 		}
89*0Sstevel@tonic-gate 	OPENSSL_free(a);
90*0Sstevel@tonic-gate 	}
91*0Sstevel@tonic-gate 
92*0Sstevel@tonic-gate int BUF_MEM_grow(BUF_MEM *str, int len)
93*0Sstevel@tonic-gate 	{
94*0Sstevel@tonic-gate 	char *ret;
95*0Sstevel@tonic-gate 	unsigned int n;
96*0Sstevel@tonic-gate 
97*0Sstevel@tonic-gate 	if (str->length >= len)
98*0Sstevel@tonic-gate 		{
99*0Sstevel@tonic-gate 		str->length=len;
100*0Sstevel@tonic-gate 		return(len);
101*0Sstevel@tonic-gate 		}
102*0Sstevel@tonic-gate 	if (str->max >= len)
103*0Sstevel@tonic-gate 		{
104*0Sstevel@tonic-gate 		memset(&str->data[str->length],0,len-str->length);
105*0Sstevel@tonic-gate 		str->length=len;
106*0Sstevel@tonic-gate 		return(len);
107*0Sstevel@tonic-gate 		}
108*0Sstevel@tonic-gate 	n=(len+3)/3*4;
109*0Sstevel@tonic-gate 	if (str->data == NULL)
110*0Sstevel@tonic-gate 		ret=OPENSSL_malloc(n);
111*0Sstevel@tonic-gate 	else
112*0Sstevel@tonic-gate 		ret=OPENSSL_realloc(str->data,n);
113*0Sstevel@tonic-gate 	if (ret == NULL)
114*0Sstevel@tonic-gate 		{
115*0Sstevel@tonic-gate 		BUFerr(BUF_F_BUF_MEM_GROW,ERR_R_MALLOC_FAILURE);
116*0Sstevel@tonic-gate 		len=0;
117*0Sstevel@tonic-gate 		}
118*0Sstevel@tonic-gate 	else
119*0Sstevel@tonic-gate 		{
120*0Sstevel@tonic-gate 		str->data=ret;
121*0Sstevel@tonic-gate 		str->max=n;
122*0Sstevel@tonic-gate 		memset(&str->data[str->length],0,len-str->length);
123*0Sstevel@tonic-gate 		str->length=len;
124*0Sstevel@tonic-gate 		}
125*0Sstevel@tonic-gate 	return(len);
126*0Sstevel@tonic-gate 	}
127*0Sstevel@tonic-gate 
128*0Sstevel@tonic-gate int BUF_MEM_grow_clean(BUF_MEM *str, int len)
129*0Sstevel@tonic-gate 	{
130*0Sstevel@tonic-gate 	char *ret;
131*0Sstevel@tonic-gate 	unsigned int n;
132*0Sstevel@tonic-gate 
133*0Sstevel@tonic-gate 	if (str->length >= len)
134*0Sstevel@tonic-gate 		{
135*0Sstevel@tonic-gate 		memset(&str->data[len],0,str->length-len);
136*0Sstevel@tonic-gate 		str->length=len;
137*0Sstevel@tonic-gate 		return(len);
138*0Sstevel@tonic-gate 		}
139*0Sstevel@tonic-gate 	if (str->max >= len)
140*0Sstevel@tonic-gate 		{
141*0Sstevel@tonic-gate 		memset(&str->data[str->length],0,len-str->length);
142*0Sstevel@tonic-gate 		str->length=len;
143*0Sstevel@tonic-gate 		return(len);
144*0Sstevel@tonic-gate 		}
145*0Sstevel@tonic-gate 	n=(len+3)/3*4;
146*0Sstevel@tonic-gate 	if (str->data == NULL)
147*0Sstevel@tonic-gate 		ret=OPENSSL_malloc(n);
148*0Sstevel@tonic-gate 	else
149*0Sstevel@tonic-gate 		ret=OPENSSL_realloc_clean(str->data,str->max,n);
150*0Sstevel@tonic-gate 	if (ret == NULL)
151*0Sstevel@tonic-gate 		{
152*0Sstevel@tonic-gate 		BUFerr(BUF_F_BUF_MEM_GROW,ERR_R_MALLOC_FAILURE);
153*0Sstevel@tonic-gate 		len=0;
154*0Sstevel@tonic-gate 		}
155*0Sstevel@tonic-gate 	else
156*0Sstevel@tonic-gate 		{
157*0Sstevel@tonic-gate 		str->data=ret;
158*0Sstevel@tonic-gate 		str->max=n;
159*0Sstevel@tonic-gate 		memset(&str->data[str->length],0,len-str->length);
160*0Sstevel@tonic-gate 		str->length=len;
161*0Sstevel@tonic-gate 		}
162*0Sstevel@tonic-gate 	return(len);
163*0Sstevel@tonic-gate 	}
164*0Sstevel@tonic-gate 
165*0Sstevel@tonic-gate char *BUF_strdup(const char *str)
166*0Sstevel@tonic-gate 	{
167*0Sstevel@tonic-gate 	char *ret;
168*0Sstevel@tonic-gate 	int n;
169*0Sstevel@tonic-gate 
170*0Sstevel@tonic-gate 	if (str == NULL) return(NULL);
171*0Sstevel@tonic-gate 
172*0Sstevel@tonic-gate 	n=strlen(str);
173*0Sstevel@tonic-gate 	ret=OPENSSL_malloc(n+1);
174*0Sstevel@tonic-gate 	if (ret == NULL)
175*0Sstevel@tonic-gate 		{
176*0Sstevel@tonic-gate 		BUFerr(BUF_F_BUF_STRDUP,ERR_R_MALLOC_FAILURE);
177*0Sstevel@tonic-gate 		return(NULL);
178*0Sstevel@tonic-gate 		}
179*0Sstevel@tonic-gate 	memcpy(ret,str,n+1);
180*0Sstevel@tonic-gate 	return(ret);
181*0Sstevel@tonic-gate 	}
182*0Sstevel@tonic-gate 
183*0Sstevel@tonic-gate size_t BUF_strlcpy(char *dst, const char *src, size_t size)
184*0Sstevel@tonic-gate 	{
185*0Sstevel@tonic-gate 	size_t l = 0;
186*0Sstevel@tonic-gate 	for(; size > 1 && *src; size--)
187*0Sstevel@tonic-gate 		{
188*0Sstevel@tonic-gate 		*dst++ = *src++;
189*0Sstevel@tonic-gate 		l++;
190*0Sstevel@tonic-gate 		}
191*0Sstevel@tonic-gate 	if (size)
192*0Sstevel@tonic-gate 		*dst = '\0';
193*0Sstevel@tonic-gate 	return l + strlen(src);
194*0Sstevel@tonic-gate 	}
195*0Sstevel@tonic-gate 
196*0Sstevel@tonic-gate size_t BUF_strlcat(char *dst, const char *src, size_t size)
197*0Sstevel@tonic-gate 	{
198*0Sstevel@tonic-gate 	size_t l = 0;
199*0Sstevel@tonic-gate 	for(; size > 0 && *dst; size--, dst++)
200*0Sstevel@tonic-gate 		l++;
201*0Sstevel@tonic-gate 	return l + BUF_strlcpy(dst, src, size);
202*0Sstevel@tonic-gate 	}
203