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/*
* SSLsplit - transparent SSL/TLS interception
* Copyright (c) 2009-2016, Daniel Roethlisberger <daniel@roe.ch>
* All rights reserved.
* http://www.roe.ch/SSLsplit
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "dynbuf.h"
#include <string.h>
#include <stdio.h>
/*
* Simple dynamic buffer, consisting of internal buffer ptr plus length.
* Dynbuf always owns the internal allocated buffer.
*/
/*
* Allocate new dynbuf; will allocate sz bytes of memory in ->buf.
*/
dynbuf_t *
dynbuf_new_alloc(size_t sz)
{
dynbuf_t *db;
if (!(db = malloc(sizeof(dynbuf_t))))
return NULL;
if (!(db->buf = malloc(sz))) {
free(db);
return NULL;
}
db->sz = sz;
return db;
}
/*
* Create new dynbuf from provided buffer, which is copied.
*/
dynbuf_t *
dynbuf_new_copy(const unsigned char *buf, const size_t sz)
{
dynbuf_t *db;
if (!(db = malloc(sizeof(dynbuf_t))))
return NULL;
if (!(db->buf = malloc(sz))) {
free(db);
return NULL;
}
memcpy(db->buf, buf, sz);
db->sz = sz;
return db;
}
/*
* Create new dynbuf by loading a file into a newly allocated internal buffer.
* The provided buffer will be freed by dynbuf_free().
*/
dynbuf_t *
dynbuf_new_file(const char *filename)
{
dynbuf_t *db;
FILE *f;
if (!(db = malloc(sizeof(dynbuf_t))))
return NULL;
f = fopen(filename, "rb");
if (!f) {
free(db);
return NULL;
}
fseek(f, 0, SEEK_END);
db->sz = ftell(f);
fseek(f, 0, SEEK_SET);
if (!(db->buf = malloc(db->sz))) {
free(db);
fclose(f);
return NULL;
}
if (fread(db->buf, db->sz, 1, f) != 1) {
free(db->buf);
free(db);
fclose(f);
return NULL;
}
fclose(f);
return db;
}
/*
* Create new dynbuf from provided, pre-allocated buffer.
* The provided buffer will be freed by dynbuf_free().
*/
dynbuf_t *
dynbuf_new(unsigned char *buf, size_t sz)
{
dynbuf_t *db;
if (!(db = malloc(sizeof(dynbuf_t))))
return NULL;
db->buf = buf;
db->sz = sz;
return db;
}
/*
* Free dynbuf including internal buffer.
*/
void
dynbuf_free(dynbuf_t *db)
{
free(db->buf);
free(db);
}
/* vim: set noet ft=c: */
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