1 /* crypto/buffer/buffer.c */
   2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   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"
  61 #include <openssl/buffer.h>
  62 
  63 char *BUF_strdup(const char *str)
  64         {
  65         if (str == NULL) return(NULL);
  66         return BUF_strndup(str, strlen(str));
  67         }
  68 
  69 char *BUF_strndup(const char *str, size_t siz)
  70         {
  71         char *ret;
  72 
  73         if (str == NULL) return(NULL);
  74 
  75         ret=OPENSSL_malloc(siz+1);
  76         if (ret == NULL)
  77                 {
  78                 BUFerr(BUF_F_BUF_STRNDUP,ERR_R_MALLOC_FAILURE);
  79                 return(NULL);
  80                 }
  81         BUF_strlcpy(ret,str,siz+1);
  82         return(ret);
  83         }
  84 
  85 void *BUF_memdup(const void *data, size_t siz)
  86         {
  87         void *ret;
  88 
  89         if (data == NULL) return(NULL);
  90 
  91         ret=OPENSSL_malloc(siz);
  92         if (ret == NULL)
  93                 {
  94                 BUFerr(BUF_F_BUF_MEMDUP,ERR_R_MALLOC_FAILURE);
  95                 return(NULL);
  96                 }
  97         return memcpy(ret, data, siz);
  98         }
  99 
 100 size_t BUF_strlcpy(char *dst, const char *src, size_t size)
 101         {
 102         size_t l = 0;
 103         for(; size > 1 && *src; size--)
 104                 {
 105                 *dst++ = *src++;
 106                 l++;
 107                 }
 108         if (size)
 109                 *dst = '\0';
 110         return l + strlen(src);
 111         }
 112 
 113 size_t BUF_strlcat(char *dst, const char *src, size_t size)
 114         {
 115         size_t l = 0;
 116         for(; size > 0 && *dst; size--, dst++)
 117                 l++;
 118         return l + BUF_strlcpy(dst, src, size);
 119         }