archive_read_support_compression_xz.c [plain text]
#include "archive_platform.h"
__FBSDID("$FreeBSD: head/lib/libarchive/archive_read_support_compression_xz.c 201167 2009-12-29 06:06:20Z kientzle $");
#ifdef HAVE_ERRNO_H
#include <errno.h>
#endif
#include <stdio.h>
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#if HAVE_LZMA_H
#include <lzma.h>
#elif HAVE_LZMADEC_H
#include <lzmadec.h>
#endif
#include "archive.h"
#include "archive_endian.h"
#include "archive_private.h"
#include "archive_read_private.h"
#if HAVE_LZMA_H && HAVE_LIBLZMA
struct private_data {
lzma_stream stream;
unsigned char *out_block;
size_t out_block_size;
int64_t total_out;
char eof;
};
static ssize_t xz_filter_read(struct archive_read_filter *, const void **);
static int xz_filter_close(struct archive_read_filter *);
static int xz_lzma_bidder_init(struct archive_read_filter *);
#elif HAVE_LZMADEC_H && HAVE_LIBLZMADEC
struct private_data {
lzmadec_stream stream;
unsigned char *out_block;
size_t out_block_size;
int64_t total_out;
char eof;
};
static ssize_t lzma_filter_read(struct archive_read_filter *, const void **);
static int lzma_filter_close(struct archive_read_filter *);
#endif
static int xz_bidder_bid(struct archive_read_filter_bidder *,
struct archive_read_filter *);
static int xz_bidder_init(struct archive_read_filter *);
static int lzma_bidder_bid(struct archive_read_filter_bidder *,
struct archive_read_filter *);
static int lzma_bidder_init(struct archive_read_filter *);
int
archive_read_support_compression_xz(struct archive *_a)
{
struct archive_read *a = (struct archive_read *)_a;
struct archive_read_filter_bidder *bidder = __archive_read_get_bidder(a);
archive_clear_error(_a);
if (bidder == NULL)
return (ARCHIVE_FATAL);
bidder->data = NULL;
bidder->bid = xz_bidder_bid;
bidder->init = xz_bidder_init;
bidder->options = NULL;
bidder->free = NULL;
#if HAVE_LZMA_H && HAVE_LIBLZMA
return (ARCHIVE_OK);
#else
archive_set_error(_a, ARCHIVE_ERRNO_MISC,
"Using external unxz program for xz decompression");
return (ARCHIVE_WARN);
#endif
}
int
archive_read_support_compression_lzma(struct archive *_a)
{
struct archive_read *a = (struct archive_read *)_a;
struct archive_read_filter_bidder *bidder = __archive_read_get_bidder(a);
archive_clear_error(_a);
if (bidder == NULL)
return (ARCHIVE_FATAL);
bidder->data = NULL;
bidder->bid = lzma_bidder_bid;
bidder->init = lzma_bidder_init;
bidder->options = NULL;
bidder->free = NULL;
#if HAVE_LZMA_H && HAVE_LIBLZMA
return (ARCHIVE_OK);
#elif HAVE_LZMADEC_H && HAVE_LIBLZMADEC
return (ARCHIVE_OK);
#else
archive_set_error(_a, ARCHIVE_ERRNO_MISC,
"Using external unlzma program for lzma decompression");
return (ARCHIVE_WARN);
#endif
}
static int
xz_bidder_bid(struct archive_read_filter_bidder *self,
struct archive_read_filter *filter)
{
const unsigned char *buffer;
ssize_t avail;
int bits_checked;
(void)self;
buffer = __archive_read_filter_ahead(filter, 6, &avail);
if (buffer == NULL)
return (0);
bits_checked = 0;
if (buffer[0] != 0xFD)
return (0);
bits_checked += 8;
if (buffer[1] != 0x37)
return (0);
bits_checked += 8;
if (buffer[2] != 0x7A)
return (0);
bits_checked += 8;
if (buffer[3] != 0x58)
return (0);
bits_checked += 8;
if (buffer[4] != 0x5A)
return (0);
bits_checked += 8;
if (buffer[5] != 0x00)
return (0);
bits_checked += 8;
return (bits_checked);
}
static int
lzma_bidder_bid(struct archive_read_filter_bidder *self,
struct archive_read_filter *filter)
{
const unsigned char *buffer;
ssize_t avail;
uint32_t dicsize;
uint64_t uncompressed_size;
int bits_checked;
(void)self;
buffer = __archive_read_filter_ahead(filter, 14, &avail);
if (buffer == NULL)
return (0);
bits_checked = 0;
if (buffer[0] > (4 * 5 + 4) * 9 + 8)
return (0);
if (buffer[0] == 0x5d || buffer[0] == 0x5e)
bits_checked += 8;
uncompressed_size = archive_le64dec(buffer+5);
if (uncompressed_size == (uint64_t)ARCHIVE_LITERAL_LL(-1))
bits_checked += 64;
dicsize = archive_le32dec(buffer+1);
switch (dicsize) {
case 0x00001000:
case 0x00002000:
case 0x00004000:
case 0x00008000:
case 0x00010000:
case 0x00020000:
case 0x00040000:
case 0x00080000:
case 0x00100000:
case 0x00200000:
case 0x00400000:
case 0x00800000:
case 0x01000000:
case 0x02000000:
case 0x04000000:
case 0x08000000:
bits_checked += 32;
break;
default:
if (dicsize <= 0x03F00000 && dicsize >= 0x00300000 &&
(dicsize & ((1 << 20)-1)) == 0 &&
bits_checked == 8 + 64) {
bits_checked += 32;
break;
}
return (0);
}
return (bits_checked);
}
#if HAVE_LZMA_H && HAVE_LIBLZMA
static int
xz_bidder_init(struct archive_read_filter *self)
{
self->code = ARCHIVE_COMPRESSION_XZ;
self->name = "xz";
return (xz_lzma_bidder_init(self));
}
static int
lzma_bidder_init(struct archive_read_filter *self)
{
self->code = ARCHIVE_COMPRESSION_LZMA;
self->name = "lzma";
return (xz_lzma_bidder_init(self));
}
static int
xz_lzma_bidder_init(struct archive_read_filter *self)
{
static const size_t out_block_size = 64 * 1024;
void *out_block;
struct private_data *state;
int ret;
state = (struct private_data *)calloc(sizeof(*state), 1);
out_block = (unsigned char *)malloc(out_block_size);
if (state == NULL || out_block == NULL) {
archive_set_error(&self->archive->archive, ENOMEM,
"Can't allocate data for xz decompression");
free(out_block);
free(state);
return (ARCHIVE_FATAL);
}
self->data = state;
state->out_block_size = out_block_size;
state->out_block = out_block;
self->read = xz_filter_read;
self->skip = NULL;
self->close = xz_filter_close;
state->stream.avail_in = 0;
state->stream.next_out = state->out_block;
state->stream.avail_out = state->out_block_size;
if (self->code == ARCHIVE_COMPRESSION_XZ)
ret = lzma_stream_decoder(&(state->stream),
(1U << 30),
LZMA_CONCATENATED);
else
ret = lzma_alone_decoder(&(state->stream),
(1U << 30));
if (ret == LZMA_OK)
return (ARCHIVE_OK);
switch (ret) {
case LZMA_MEM_ERROR:
archive_set_error(&self->archive->archive, ENOMEM,
"Internal error initializing compression library: "
"Cannot allocate memory");
break;
case LZMA_OPTIONS_ERROR:
archive_set_error(&self->archive->archive,
ARCHIVE_ERRNO_MISC,
"Internal error initializing compression library: "
"Invalid or unsupported options");
break;
default:
archive_set_error(&self->archive->archive, ARCHIVE_ERRNO_MISC,
"Internal error initializing lzma library");
break;
}
free(state->out_block);
free(state);
self->data = NULL;
return (ARCHIVE_FATAL);
}
static ssize_t
xz_filter_read(struct archive_read_filter *self, const void **p)
{
struct private_data *state;
size_t decompressed;
ssize_t avail_in;
int ret;
state = (struct private_data *)self->data;
state->stream.next_out = state->out_block;
state->stream.avail_out = state->out_block_size;
while (state->stream.avail_out > 0 && !state->eof) {
state->stream.next_in =
__archive_read_filter_ahead(self->upstream, 1, &avail_in);
if (state->stream.next_in == NULL && avail_in < 0)
return (ARCHIVE_FATAL);
state->stream.avail_in = avail_in;
ret = lzma_code(&(state->stream),
(state->stream.avail_in == 0)? LZMA_FINISH: LZMA_RUN);
switch (ret) {
case LZMA_STREAM_END:
state->eof = 1;
case LZMA_OK:
__archive_read_filter_consume(self->upstream,
avail_in - state->stream.avail_in);
break;
case LZMA_MEM_ERROR:
archive_set_error(&self->archive->archive, ENOMEM,
"Lzma library error: Cannot allocate memory");
return (ARCHIVE_FATAL);
case LZMA_MEMLIMIT_ERROR:
archive_set_error(&self->archive->archive, ENOMEM,
"Lzma library error: Out of memory");
return (ARCHIVE_FATAL);
case LZMA_FORMAT_ERROR:
archive_set_error(&self->archive->archive,
ARCHIVE_ERRNO_MISC,
"Lzma library error: format not recognized");
return (ARCHIVE_FATAL);
case LZMA_OPTIONS_ERROR:
archive_set_error(&self->archive->archive,
ARCHIVE_ERRNO_MISC,
"Lzma library error: Invalid options");
return (ARCHIVE_FATAL);
case LZMA_DATA_ERROR:
archive_set_error(&self->archive->archive,
ARCHIVE_ERRNO_MISC,
"Lzma library error: Corrupted input data");
return (ARCHIVE_FATAL);
case LZMA_BUF_ERROR:
archive_set_error(&self->archive->archive,
ARCHIVE_ERRNO_MISC,
"Lzma library error: No progress is possible");
return (ARCHIVE_FATAL);
default:
archive_set_error(&self->archive->archive,
ARCHIVE_ERRNO_MISC,
"Lzma decompression failed: Unknown error");
return (ARCHIVE_FATAL);
}
}
decompressed = state->stream.next_out - state->out_block;
state->total_out += decompressed;
if (decompressed == 0)
*p = NULL;
else
*p = state->out_block;
return (decompressed);
}
static int
xz_filter_close(struct archive_read_filter *self)
{
struct private_data *state;
state = (struct private_data *)self->data;
lzma_end(&(state->stream));
free(state->out_block);
free(state);
return (ARCHIVE_OK);
}
#else
#if HAVE_LZMADEC_H && HAVE_LIBLZMADEC
static int
lzma_bidder_init(struct archive_read_filter *self)
{
static const size_t out_block_size = 64 * 1024;
void *out_block;
struct private_data *state;
ssize_t ret, avail_in;
self->code = ARCHIVE_COMPRESSION_LZMA;
self->name = "lzma";
state = (struct private_data *)calloc(sizeof(*state), 1);
out_block = (unsigned char *)malloc(out_block_size);
if (state == NULL || out_block == NULL) {
archive_set_error(&self->archive->archive, ENOMEM,
"Can't allocate data for lzma decompression");
free(out_block);
free(state);
return (ARCHIVE_FATAL);
}
self->data = state;
state->out_block_size = out_block_size;
state->out_block = out_block;
self->read = lzma_filter_read;
self->skip = NULL;
self->close = lzma_filter_close;
state->stream.next_in = (unsigned char *)(uintptr_t)
__archive_read_filter_ahead(self->upstream, 18, &avail_in);
if (state->stream.next_in == NULL)
return (ARCHIVE_FATAL);
state->stream.avail_in = avail_in;
state->stream.next_out = state->out_block;
state->stream.avail_out = state->out_block_size;
ret = lzmadec_init(&(state->stream));
__archive_read_filter_consume(self->upstream,
avail_in - state->stream.avail_in);
if (ret == LZMADEC_OK)
return (ARCHIVE_OK);
archive_set_error(&self->archive->archive, ARCHIVE_ERRNO_MISC,
"Internal error initializing lzma library");
switch (ret) {
case LZMADEC_HEADER_ERROR:
archive_set_error(&self->archive->archive,
ARCHIVE_ERRNO_MISC,
"Internal error initializing compression library: "
"invalid header");
break;
case LZMADEC_MEM_ERROR:
archive_set_error(&self->archive->archive, ENOMEM,
"Internal error initializing compression library: "
"out of memory");
break;
}
free(state->out_block);
free(state);
self->data = NULL;
return (ARCHIVE_FATAL);
}
static ssize_t
lzma_filter_read(struct archive_read_filter *self, const void **p)
{
struct private_data *state;
size_t decompressed;
ssize_t avail_in, ret;
state = (struct private_data *)self->data;
state->stream.next_out = state->out_block;
state->stream.avail_out = state->out_block_size;
while (state->stream.avail_out > 0 && !state->eof) {
state->stream.next_in = (unsigned char *)(uintptr_t)
__archive_read_filter_ahead(self->upstream, 1, &avail_in);
if (state->stream.next_in == NULL && avail_in < 0)
return (ARCHIVE_FATAL);
state->stream.avail_in = avail_in;
ret = lzmadec_decode(&(state->stream), avail_in == 0);
switch (ret) {
case LZMADEC_STREAM_END:
state->eof = 1;
case LZMADEC_OK:
__archive_read_filter_consume(self->upstream,
avail_in - state->stream.avail_in);
break;
case LZMADEC_BUF_ERROR:
archive_set_error(&self->archive->archive,
ARCHIVE_ERRNO_MISC,
"Insufficient compressed data");
return (ARCHIVE_FATAL);
default:
archive_set_error(&self->archive->archive,
ARCHIVE_ERRNO_MISC,
"Lzma decompression failed");
return (ARCHIVE_FATAL);
}
}
decompressed = state->stream.next_out - state->out_block;
state->total_out += decompressed;
if (decompressed == 0)
*p = NULL;
else
*p = state->out_block;
return (decompressed);
}
static int
lzma_filter_close(struct archive_read_filter *self)
{
struct private_data *state;
int ret;
state = (struct private_data *)self->data;
ret = ARCHIVE_OK;
switch (lzmadec_end(&(state->stream))) {
case LZMADEC_OK:
break;
default:
archive_set_error(&(self->archive->archive),
ARCHIVE_ERRNO_MISC,
"Failed to clean up %s compressor",
self->archive->archive.compression_name);
ret = ARCHIVE_FATAL;
}
free(state->out_block);
free(state);
return (ret);
}
#else
static int
lzma_bidder_init(struct archive_read_filter *self)
{
int r;
r = __archive_read_program(self, "unlzma");
self->code = ARCHIVE_COMPRESSION_LZMA;
self->name = "lzma";
return (r);
}
#endif
static int
xz_bidder_init(struct archive_read_filter *self)
{
int r;
r = __archive_read_program(self, "unxz");
self->code = ARCHIVE_COMPRESSION_XZ;
self->name = "xz";
return (r);
}
#endif