mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-25 11:37:56 +00:00
264 lines
7.2 KiB
C
264 lines
7.2 KiB
C
/* $OpenBSD: deflate.c,v 1.3 2001/08/20 02:45:22 hugh Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 2001 Jean-Jacques Bernard-Gundol (jj@wabbitt.org)
|
|
*
|
|
* 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.
|
|
* 3. The name of the author may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
/*
|
|
* This file contains a wrapper around the deflate algo compression
|
|
* functions using the zlib library (see net/zlib.{c,h})
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/param.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/param.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/sdt.h>
|
|
#include <sys/systm.h>
|
|
#include <net/zlib.h>
|
|
|
|
#include <opencrypto/cryptodev.h>
|
|
#include <opencrypto/deflate.h>
|
|
|
|
SDT_PROVIDER_DECLARE(opencrypto);
|
|
SDT_PROBE_DEFINE2(opencrypto, deflate, deflate_global, entry,
|
|
"int", "u_int32_t");
|
|
SDT_PROBE_DEFINE5(opencrypto, deflate, deflate_global, bad,
|
|
"int", "int", "int", "int", "int");
|
|
SDT_PROBE_DEFINE5(opencrypto, deflate, deflate_global, iter,
|
|
"int", "int", "int", "int", "int");
|
|
SDT_PROBE_DEFINE2(opencrypto, deflate, deflate_global, return,
|
|
"int", "u_int32_t");
|
|
|
|
int window_inflate = -1 * MAX_WBITS;
|
|
int window_deflate = -12;
|
|
|
|
/*
|
|
* This function takes a block of data and (de)compress it using the deflate
|
|
* algorithm
|
|
*/
|
|
|
|
u_int32_t
|
|
deflate_global(data, size, decomp, out)
|
|
u_int8_t *data;
|
|
u_int32_t size;
|
|
int decomp;
|
|
u_int8_t **out;
|
|
{
|
|
/* decomp indicates whether we compress (0) or decompress (1) */
|
|
|
|
z_stream zbuf;
|
|
u_int8_t *output;
|
|
u_int32_t count, result;
|
|
int error, i;
|
|
struct deflate_buf *bufh, *bufp;
|
|
|
|
SDT_PROBE2(opencrypto, deflate, deflate_global, entry, decomp, size);
|
|
|
|
bufh = bufp = NULL;
|
|
if (!decomp) {
|
|
i = 1;
|
|
} else {
|
|
/*
|
|
* Choose a buffer with 4x the size of the input buffer
|
|
* for the size of the output buffer in the case of
|
|
* decompression. If it's not sufficient, it will need to be
|
|
* updated while the decompression is going on.
|
|
*/
|
|
i = 4;
|
|
}
|
|
/*
|
|
* Make sure we do have enough output space. Repeated calls to
|
|
* deflate need at least 6 bytes of output buffer space to avoid
|
|
* repeated markers. We will always provide at least 16 bytes.
|
|
*/
|
|
while ((size * i) < 16)
|
|
i++;
|
|
|
|
bufh = bufp = malloc(sizeof(*bufp) + (size_t)(size * i),
|
|
M_CRYPTO_DATA, M_NOWAIT);
|
|
if (bufp == NULL) {
|
|
SDT_PROBE3(opencrypto, deflate, deflate_global, bad,
|
|
decomp, 0, __LINE__);
|
|
goto bad2;
|
|
}
|
|
bufp->next = NULL;
|
|
bufp->size = size * i;
|
|
|
|
bzero(&zbuf, sizeof(z_stream));
|
|
zbuf.zalloc = z_alloc;
|
|
zbuf.zfree = z_free;
|
|
zbuf.opaque = Z_NULL;
|
|
zbuf.next_in = data; /* Data that is going to be processed. */
|
|
zbuf.avail_in = size; /* Total length of data to be processed. */
|
|
zbuf.next_out = bufp->data;
|
|
zbuf.avail_out = bufp->size;
|
|
|
|
error = decomp ? inflateInit2(&zbuf, window_inflate) :
|
|
deflateInit2(&zbuf, Z_DEFAULT_COMPRESSION, Z_METHOD,
|
|
window_deflate, Z_MEMLEVEL, Z_DEFAULT_STRATEGY);
|
|
if (error != Z_OK) {
|
|
SDT_PROBE3(opencrypto, deflate, deflate_global, bad,
|
|
decomp, error, __LINE__);
|
|
goto bad;
|
|
}
|
|
|
|
for (;;) {
|
|
error = decomp ? inflate(&zbuf, Z_SYNC_FLUSH) :
|
|
deflate(&zbuf, Z_FINISH);
|
|
if (error != Z_OK && error != Z_STREAM_END) {
|
|
/*
|
|
* Unfortunately we are limited to 5 arguments,
|
|
* thus use two probes.
|
|
*/
|
|
SDT_PROBE5(opencrypto, deflate, deflate_global, bad,
|
|
decomp, error, __LINE__,
|
|
zbuf.avail_in, zbuf.avail_out);
|
|
SDT_PROBE5(opencrypto, deflate, deflate_global, bad,
|
|
decomp, error, __LINE__,
|
|
zbuf.state->dummy, zbuf.total_out);
|
|
goto bad;
|
|
}
|
|
SDT_PROBE5(opencrypto, deflate, deflate_global, iter,
|
|
decomp, error, __LINE__,
|
|
zbuf.avail_in, zbuf.avail_out);
|
|
SDT_PROBE5(opencrypto, deflate, deflate_global, iter,
|
|
decomp, error, __LINE__,
|
|
zbuf.state->dummy, zbuf.total_out);
|
|
if (decomp && zbuf.avail_in == 0 && error == Z_STREAM_END) {
|
|
/* Done. */
|
|
break;
|
|
} else if (!decomp && error == Z_STREAM_END) {
|
|
/* Done. */
|
|
break;
|
|
} else if (zbuf.avail_out == 0) {
|
|
struct deflate_buf *p;
|
|
|
|
/* We need more output space for another iteration. */
|
|
p = malloc(sizeof(*p) + (size_t)(size * i),
|
|
M_CRYPTO_DATA, M_NOWAIT);
|
|
if (p == NULL) {
|
|
SDT_PROBE3(opencrypto, deflate, deflate_global,
|
|
bad, decomp, 0, __LINE__);
|
|
goto bad;
|
|
}
|
|
p->next = NULL;
|
|
p->size = size * i;
|
|
bufp->next = p;
|
|
bufp = p;
|
|
zbuf.next_out = bufp->data;
|
|
zbuf.avail_out = bufp->size;
|
|
} else {
|
|
/* Unexpect result. */
|
|
/*
|
|
* Unfortunately we are limited to 5 arguments,
|
|
* thus, again, use two probes.
|
|
*/
|
|
SDT_PROBE5(opencrypto, deflate, deflate_global, bad,
|
|
decomp, error, __LINE__,
|
|
zbuf.avail_in, zbuf.avail_out);
|
|
SDT_PROBE5(opencrypto, deflate, deflate_global, bad,
|
|
decomp, error, __LINE__,
|
|
zbuf.state->dummy, zbuf.total_out);
|
|
goto bad;
|
|
}
|
|
}
|
|
|
|
result = count = zbuf.total_out;
|
|
|
|
*out = malloc(result, M_CRYPTO_DATA, M_NOWAIT);
|
|
if (*out == NULL) {
|
|
SDT_PROBE3(opencrypto, deflate, deflate_global, bad,
|
|
decomp, 0, __LINE__);
|
|
goto bad;
|
|
}
|
|
if (decomp)
|
|
inflateEnd(&zbuf);
|
|
else
|
|
deflateEnd(&zbuf);
|
|
output = *out;
|
|
for (bufp = bufh; bufp != NULL; ) {
|
|
if (count > bufp->size) {
|
|
struct deflate_buf *p;
|
|
|
|
bcopy(bufp->data, *out, bufp->size);
|
|
*out += bufp->size;
|
|
count -= bufp->size;
|
|
p = bufp;
|
|
bufp = bufp->next;
|
|
free(p, M_CRYPTO_DATA);
|
|
} else {
|
|
/* It should be the last buffer. */
|
|
bcopy(bufp->data, *out, count);
|
|
*out += count;
|
|
free(bufp, M_CRYPTO_DATA);
|
|
bufp = NULL;
|
|
count = 0;
|
|
}
|
|
}
|
|
*out = output;
|
|
SDT_PROBE2(opencrypto, deflate, deflate_global, return, decomp, result);
|
|
return result;
|
|
|
|
bad:
|
|
if (decomp)
|
|
inflateEnd(&zbuf);
|
|
else
|
|
deflateEnd(&zbuf);
|
|
for (bufp = bufh; bufp != NULL; ) {
|
|
struct deflate_buf *p;
|
|
|
|
p = bufp;
|
|
bufp = bufp->next;
|
|
free(p, M_CRYPTO_DATA);
|
|
}
|
|
bad2:
|
|
*out = NULL;
|
|
return 0;
|
|
}
|
|
|
|
void *
|
|
z_alloc(nil, type, size)
|
|
void *nil;
|
|
u_int type, size;
|
|
{
|
|
void *ptr;
|
|
|
|
ptr = malloc(type *size, M_CRYPTO_DATA, M_NOWAIT);
|
|
return ptr;
|
|
}
|
|
|
|
void
|
|
z_free(nil, ptr)
|
|
void *nil, *ptr;
|
|
{
|
|
free(ptr, M_CRYPTO_DATA);
|
|
}
|