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d02b48c6 | 1 | /* crypto/buffer/buffer.c */ |
58964a49 | 2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
d02b48c6 RE |
3 | * All rights reserved. |
4 | * | |
5 | * This package is an SSL implementation written | |
6 | * by Eric Young (eay@cryptsoft.com). | |
7 | * The implementation was written so as to conform with Netscapes SSL. | |
8 | * | |
9 | * This library is free for commercial and non-commercial use as long as | |
10 | * the following conditions are aheared to. The following conditions | |
11 | * apply to all code found in this distribution, be it the RC4, RSA, | |
12 | * lhash, DES, etc., code; not just the SSL code. The SSL documentation | |
13 | * included with this distribution is covered by the same copyright terms | |
14 | * except that the holder is Tim Hudson (tjh@cryptsoft.com). | |
15 | * | |
16 | * Copyright remains Eric Young's, and as such any Copyright notices in | |
17 | * the code are not to be removed. | |
18 | * If this package is used in a product, Eric Young should be given attribution | |
19 | * as the author of the parts of the library used. | |
20 | * This can be in the form of a textual message at program startup or | |
21 | * in documentation (online or textual) provided with the package. | |
22 | * | |
23 | * Redistribution and use in source and binary forms, with or without | |
24 | * modification, are permitted provided that the following conditions | |
25 | * are met: | |
26 | * 1. Redistributions of source code must retain the copyright | |
27 | * notice, this list of conditions and the following disclaimer. | |
28 | * 2. Redistributions in binary form must reproduce the above copyright | |
29 | * notice, this list of conditions and the following disclaimer in the | |
30 | * documentation and/or other materials provided with the distribution. | |
31 | * 3. All advertising materials mentioning features or use of this software | |
32 | * must display the following acknowledgement: | |
33 | * "This product includes cryptographic software written by | |
34 | * Eric Young (eay@cryptsoft.com)" | |
35 | * The word 'cryptographic' can be left out if the rouines from the library | |
36 | * being used are not cryptographic related :-). | |
37 | * 4. If you include any Windows specific code (or a derivative thereof) from | |
38 | * the apps directory (application code) you must include an acknowledgement: | |
39 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
40 | * | |
41 | * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND | |
42 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
43 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
44 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE | |
45 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
46 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
47 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
48 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
49 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
50 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
51 | * SUCH DAMAGE. | |
52 | * | |
53 | * The licence and distribution terms for any publically available version or | |
54 | * derivative of this code cannot be changed. i.e. this code cannot simply be | |
55 | * copied and put under another distribution licence | |
56 | * [including the GNU Public Licence.] | |
57 | */ | |
58 | ||
59 | #include <stdio.h> | |
60 | #include "cryptlib.h" | |
ec577822 | 61 | #include <openssl/buffer.h> |
d02b48c6 | 62 | |
6b691a5c | 63 | BUF_MEM *BUF_MEM_new(void) |
d02b48c6 RE |
64 | { |
65 | BUF_MEM *ret; | |
66 | ||
26a3a48d | 67 | ret=OPENSSL_malloc(sizeof(BUF_MEM)); |
d02b48c6 RE |
68 | if (ret == NULL) |
69 | { | |
70 | BUFerr(BUF_F_BUF_MEM_NEW,ERR_R_MALLOC_FAILURE); | |
71 | return(NULL); | |
72 | } | |
73 | ret->length=0; | |
74 | ret->max=0; | |
75 | ret->data=NULL; | |
76 | return(ret); | |
77 | } | |
78 | ||
6b691a5c | 79 | void BUF_MEM_free(BUF_MEM *a) |
d02b48c6 | 80 | { |
e03ddfae BL |
81 | if(a == NULL) |
82 | return; | |
83 | ||
d02b48c6 RE |
84 | if (a->data != NULL) |
85 | { | |
86 | memset(a->data,0,(unsigned int)a->max); | |
26a3a48d | 87 | OPENSSL_free(a->data); |
d02b48c6 | 88 | } |
26a3a48d | 89 | OPENSSL_free(a); |
d02b48c6 RE |
90 | } |
91 | ||
6b691a5c | 92 | int BUF_MEM_grow(BUF_MEM *str, int len) |
d02b48c6 RE |
93 | { |
94 | char *ret; | |
95 | unsigned int n; | |
96 | ||
58964a49 RE |
97 | if (str->length >= len) |
98 | { | |
99 | str->length=len; | |
100 | return(len); | |
101 | } | |
d02b48c6 RE |
102 | if (str->max >= len) |
103 | { | |
61f5b6f3 | 104 | memset(&str->data[str->length],0,len-str->length); |
d02b48c6 RE |
105 | str->length=len; |
106 | return(len); | |
107 | } | |
108 | n=(len+3)/3*4; | |
109 | if (str->data == NULL) | |
26a3a48d | 110 | ret=OPENSSL_malloc(n); |
d02b48c6 | 111 | else |
26a3a48d | 112 | ret=OPENSSL_realloc(str->data,n); |
d02b48c6 RE |
113 | if (ret == NULL) |
114 | { | |
115 | BUFerr(BUF_F_BUF_MEM_GROW,ERR_R_MALLOC_FAILURE); | |
116 | len=0; | |
117 | } | |
118 | else | |
119 | { | |
120 | str->data=ret; | |
d02b48c6 | 121 | str->max=n; |
b693f941 BM |
122 | memset(&str->data[str->length],0,len-str->length); |
123 | str->length=len; | |
d02b48c6 RE |
124 | } |
125 | return(len); | |
126 | } | |
127 | ||
54a656ef BL |
128 | int BUF_MEM_grow_clean(BUF_MEM *str, int len) |
129 | { | |
130 | char *ret; | |
131 | unsigned int n; | |
132 | ||
133 | if (str->length >= len) | |
134 | { | |
135 | memset(&str->data[len],0,str->length-len); | |
136 | str->length=len; | |
137 | return(len); | |
138 | } | |
139 | if (str->max >= len) | |
140 | { | |
141 | memset(&str->data[str->length],0,len-str->length); | |
142 | str->length=len; | |
143 | return(len); | |
144 | } | |
145 | n=(len+3)/3*4; | |
146 | if (str->data == NULL) | |
147 | ret=OPENSSL_malloc(n); | |
148 | else | |
149 | ret=OPENSSL_realloc_clean(str->data,str->max,n); | |
150 | if (ret == NULL) | |
151 | { | |
aa4ce731 | 152 | BUFerr(BUF_F_BUF_MEM_GROW_CLEAN,ERR_R_MALLOC_FAILURE); |
54a656ef BL |
153 | len=0; |
154 | } | |
155 | else | |
156 | { | |
157 | str->data=ret; | |
158 | str->max=n; | |
159 | memset(&str->data[str->length],0,len-str->length); | |
160 | str->length=len; | |
161 | } | |
162 | return(len); | |
163 | } | |
164 | ||
6b691a5c | 165 | char *BUF_strdup(const char *str) |
1ae0a83b RL |
166 | { |
167 | if (str == NULL) return(NULL); | |
168 | return BUF_strndup(str, strlen(str)); | |
169 | } | |
170 | ||
171 | char *BUF_strndup(const char *str, size_t siz) | |
d02b48c6 RE |
172 | { |
173 | char *ret; | |
d02b48c6 | 174 | |
58964a49 RE |
175 | if (str == NULL) return(NULL); |
176 | ||
1ae0a83b | 177 | ret=OPENSSL_malloc(siz+1); |
d02b48c6 RE |
178 | if (ret == NULL) |
179 | { | |
1ae0a83b | 180 | BUFerr(BUF_F_BUF_STRNDUP,ERR_R_MALLOC_FAILURE); |
d02b48c6 RE |
181 | return(NULL); |
182 | } | |
1ae0a83b | 183 | BUF_strlcpy(ret,str,siz+1); |
d02b48c6 RE |
184 | return(ret); |
185 | } | |
186 | ||
1ae0a83b RL |
187 | void *BUF_memdup(const void *data, size_t siz) |
188 | { | |
189 | void *ret; | |
190 | ||
191 | if (data == NULL) return(NULL); | |
192 | ||
193 | ret=OPENSSL_malloc(siz); | |
194 | if (ret == NULL) | |
195 | { | |
196 | BUFerr(BUF_F_BUF_MEMDUP,ERR_R_MALLOC_FAILURE); | |
197 | return(NULL); | |
198 | } | |
199 | return memcpy(ret, data, siz); | |
200 | } | |
201 | ||
54a656ef BL |
202 | size_t BUF_strlcpy(char *dst, const char *src, size_t size) |
203 | { | |
204 | size_t l = 0; | |
205 | for(; size > 1 && *src; size--) | |
206 | { | |
207 | *dst++ = *src++; | |
208 | l++; | |
209 | } | |
210 | if (size) | |
211 | *dst = '\0'; | |
212 | return l + strlen(src); | |
213 | } | |
214 | ||
215 | size_t BUF_strlcat(char *dst, const char *src, size_t size) | |
216 | { | |
217 | size_t l = 0; | |
218 | for(; size > 0 && *dst; size--, dst++) | |
219 | l++; | |
220 | return l + BUF_strlcpy(dst, src, size); | |
221 | } |