1 /* crypto/buffer/buffer.c */ 2 /* Copyright (C) 1995-1998 Eric Young (eay (at) cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay (at) 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 (at) 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 (at) 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 (at) 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" 61 #include <openssl/buffer.h> 62 63 BUF_MEM *BUF_MEM_new(void) 64 { 65 BUF_MEM *ret; 66 67 ret=OPENSSL_malloc(sizeof(BUF_MEM)); 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 79 void BUF_MEM_free(BUF_MEM *a) 80 { 81 if(a == NULL) 82 return; 83 84 if (a->data != NULL) 85 { 86 memset(a->data,0,(unsigned int)a->max); 87 OPENSSL_free(a->data); 88 } 89 OPENSSL_free(a); 90 } 91 92 int BUF_MEM_grow(BUF_MEM *str, size_t len) 93 { 94 char *ret; 95 size_t n; 96 97 if (str->length >= len) 98 { 99 str->length=len; 100 return(len); 101 } 102 if (str->max >= len) 103 { 104 memset(&str->data[str->length],0,len-str->length); 105 str->length=len; 106 return(len); 107 } 108 n=(len+3)/3*4; 109 if (str->data == NULL) 110 ret=OPENSSL_malloc(n); 111 else 112 ret=OPENSSL_realloc(str->data,n); 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; 121 str->max=n; 122 memset(&str->data[str->length],0,len-str->length); 123 str->length=len; 124 } 125 return(len); 126 } 127 128 int BUF_MEM_grow_clean(BUF_MEM *str, size_t len) 129 { 130 char *ret; 131 size_t 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 { 152 BUFerr(BUF_F_BUF_MEM_GROW_CLEAN,ERR_R_MALLOC_FAILURE); 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 } 164 165 char *BUF_strdup(const char *str) 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) 172 { 173 char *ret; 174 175 if (str == NULL) return(NULL); 176 177 ret=OPENSSL_malloc(siz+1); 178 if (ret == NULL) 179 { 180 BUFerr(BUF_F_BUF_STRNDUP,ERR_R_MALLOC_FAILURE); 181 return(NULL); 182 } 183 BUF_strlcpy(ret,str,siz+1); 184 return(ret); 185 } 186 187 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 } 201 202 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 } 222 223 void BUF_reverse(unsigned char *out, unsigned char *in, size_t size) 224 { 225 size_t i; 226 if (in) 227 { 228 out += size - 1; 229 for (i = 0; i < size; i++) 230 *in++ = *out--; 231 } 232 else 233 { 234 unsigned char *q; 235 char c; 236 q = out + size - 1; 237 for (i = 0; i < size/2; i++) 238 { 239 c = *q; 240 *q-- = *out; 241 *out++ = c; 242 } 243 } 244 } 245
