diff options
Diffstat (limited to 'lib/libarchive/archive_read_support_compression_xz.c')
| -rw-r--r-- | lib/libarchive/archive_read_support_compression_xz.c | 708 |
1 files changed, 0 insertions, 708 deletions
diff --git a/lib/libarchive/archive_read_support_compression_xz.c b/lib/libarchive/archive_read_support_compression_xz.c deleted file mode 100644 index 1554d99..0000000 --- a/lib/libarchive/archive_read_support_compression_xz.c +++ /dev/null @@ -1,708 +0,0 @@ -/*- - * Copyright (c) 2009 Michihiro NAKAJIMA - * Copyright (c) 2003-2008 Tim Kientzle and Miklos Vajna - * All rights reserved. - * - * 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(S) ``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(S) 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 "archive_platform.h" - -__FBSDID("$FreeBSD$"); - -#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; /* True = found end of compressed data. */ -}; - -/* Combined lzma/xz filter */ -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; /* True = found end of compressed data. */ -}; - -/* Lzma-only filter */ -static ssize_t lzma_filter_read(struct archive_read_filter *, const void **); -static int lzma_filter_close(struct archive_read_filter *); -#endif - -/* - * Note that we can detect xz and lzma compressed files even if we - * can't decompress them. (In fact, we like detecting them because we - * can give better error messages.) So the bid framework here gets - * compiled even if no lzma library is available. - */ -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 -} - -/* - * Test whether we can handle this data. - */ -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; /* UNUSED */ - - buffer = __archive_read_filter_ahead(filter, 6, &avail); - if (buffer == NULL) - return (0); - - /* - * Verify Header Magic Bytes : FD 37 7A 58 5A 00 - */ - 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); -} - -/* - * Test whether we can handle this data. - * - * <sigh> LZMA has a rather poor file signature. Zeros do not - * make good signature bytes as a rule, and the only non-zero byte - * here is an ASCII character. For example, an uncompressed tar - * archive whose first file is ']' would satisfy this check. It may - * be necessary to exclude LZMA from compression_all() because of - * this. Clients of libarchive would then have to explicitly enable - * LZMA checking instead of (or in addition to) compression_all() when - * they have other evidence (file name, command-line option) to go on. - */ -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; /* UNUSED */ - - buffer = __archive_read_filter_ahead(filter, 14, &avail); - if (buffer == NULL) - return (0); - - /* First byte of raw LZMA stream is commonly 0x5d. - * The first byte is a special number, which consists of - * three parameters of LZMA compression, a number of literal - * context bits(which is from 0 to 8, default is 3), a number - * of literal pos bits(which is from 0 to 4, default is 0), - * a number of pos bits(which is from 0 to 4, default is 2). - * The first byte is made by - * (pos bits * 5 + literal pos bit) * 9 + * literal contest bit, - * and so the default value in this field is - * (2 * 5 + 0) * 9 + 3 = 0x5d. - * lzma of LZMA SDK has options to change those parameters. - * It means a range of this field is from 0 to 224. And lzma of - * XZ Utils with option -e records 0x5e in this field. */ - /* NOTE: If this checking of the first byte increases false - * recognition, we should allow only 0x5d and 0x5e for the first - * byte of LZMA stream. */ - bits_checked = 0; - if (buffer[0] > (4 * 5 + 4) * 9 + 8) - return (0); - /* Most likely value in the first byte of LZMA stream. */ - if (buffer[0] == 0x5d || buffer[0] == 0x5e) - bits_checked += 8; - - /* Sixth through fourteenth bytes are uncompressed size, - * stored in little-endian order. `-1' means uncompressed - * size is unknown and lzma of XZ Utils always records `-1' - * in this field. */ - uncompressed_size = archive_le64dec(buffer+5); - if (uncompressed_size == (uint64_t)ARCHIVE_LITERAL_LL(-1)) - bits_checked += 64; - - /* Second through fifth bytes are dictionary size, stored in - * little-endian order. The minimum dictionary size is - * 1 << 12(4KiB) which the lzma of LZMA SDK uses with option - * -d12 and the maxinam dictionary size is 1 << 27(128MiB) - * which the one uses with option -d27. - * NOTE: A comment of LZMA SDK source code says this dictionary - * range is from 1 << 12 to 1 << 30. */ - dicsize = archive_le32dec(buffer+1); - switch (dicsize) { - case 0x00001000:/* lzma of LZMA SDK option -d12. */ - case 0x00002000:/* lzma of LZMA SDK option -d13. */ - case 0x00004000:/* lzma of LZMA SDK option -d14. */ - case 0x00008000:/* lzma of LZMA SDK option -d15. */ - case 0x00010000:/* lzma of XZ Utils option -0 and -1. - * lzma of LZMA SDK option -d16. */ - case 0x00020000:/* lzma of LZMA SDK option -d17. */ - case 0x00040000:/* lzma of LZMA SDK option -d18. */ - case 0x00080000:/* lzma of XZ Utils option -2. - * lzma of LZMA SDK option -d19. */ - case 0x00100000:/* lzma of XZ Utils option -3. - * lzma of LZMA SDK option -d20. */ - case 0x00200000:/* lzma of XZ Utils option -4. - * lzma of LZMA SDK option -d21. */ - case 0x00400000:/* lzma of XZ Utils option -5. - * lzma of LZMA SDK option -d22. */ - case 0x00800000:/* lzma of XZ Utils option -6. - * lzma of LZMA SDK option -d23. */ - case 0x01000000:/* lzma of XZ Utils option -7. - * lzma of LZMA SDK option -d24. */ - case 0x02000000:/* lzma of XZ Utils option -8. - * lzma of LZMA SDK option -d25. */ - case 0x04000000:/* lzma of XZ Utils option -9. - * lzma of LZMA SDK option -d26. */ - case 0x08000000:/* lzma of LZMA SDK option -d27. */ - bits_checked += 32; - break; - default: - /* If a memory usage for encoding was not enough on - * the platform where LZMA stream was made, lzma of - * XZ Utils automatically decreased the dictionary - * size to enough memory for encoding by 1Mi bytes - * (1 << 20).*/ - if (dicsize <= 0x03F00000 && dicsize >= 0x00300000 && - (dicsize & ((1 << 20)-1)) == 0 && - bits_checked == 8 + 64) { - bits_checked += 32; - break; - } - /* Otherwise dictionary size is unlikely. But it is - * possible that someone makes lzma stream with - * liblzma/LZMA SDK in one's dictionary size. */ - return (0); - } - - /* TODO: The above test is still very weak. It would be - * good to do better. */ - - return (bits_checked); -} - -#if HAVE_LZMA_H && HAVE_LIBLZMA - -/* - * liblzma 4.999.7 and later support both lzma and xz streams. - */ -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)); -} - -/* - * Setup the callbacks. - */ -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; /* not supported */ - 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; - - /* Initialize compression library. - * TODO: I don't know what value is best for memlimit. - * maybe, it needs to check memory size which - * running system has. - */ - if (self->code == ARCHIVE_COMPRESSION_XZ) - ret = lzma_stream_decoder(&(state->stream), - (1U << 30),/* memlimit */ - LZMA_CONCATENATED); - else - ret = lzma_alone_decoder(&(state->stream), - (1U << 30));/* memlimit */ - - if (ret == LZMA_OK) - return (ARCHIVE_OK); - - /* Library setup failed: Choose an error message and clean up. */ - 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); -} - -/* - * Return the next block of decompressed data. - */ -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; - - /* Empty our output buffer. */ - state->stream.next_out = state->out_block; - state->stream.avail_out = state->out_block_size; - - /* Try to fill the output buffer. */ - 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; - - /* Decompress as much as we can in one pass. */ - ret = lzma_code(&(state->stream), - (state->stream.avail_in == 0)? LZMA_FINISH: LZMA_RUN); - switch (ret) { - case LZMA_STREAM_END: /* Found end of stream. */ - state->eof = 1; - /* FALL THROUGH */ - case LZMA_OK: /* Decompressor made some progress. */ - __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: - /* Return an error. */ - 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); -} - -/* - * Clean up the decompressor. - */ -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 - -/* - * If we have the older liblzmadec library, then we can handle - * LZMA streams but not XZ streams. - */ - -/* - * Setup the callbacks. - */ -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; /* not supported */ - self->close = lzma_filter_close; - - /* Prime the lzma library with 18 bytes of input. */ - 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; - - /* Initialize compression library. */ - ret = lzmadec_init(&(state->stream)); - __archive_read_filter_consume(self->upstream, - avail_in - state->stream.avail_in); - if (ret == LZMADEC_OK) - return (ARCHIVE_OK); - - /* Library setup failed: Clean up. */ - archive_set_error(&self->archive->archive, ARCHIVE_ERRNO_MISC, - "Internal error initializing lzma library"); - - /* Override the error message if we know what really went wrong. */ - 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); -} - -/* - * Return the next block of decompressed data. - */ -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; - - /* Empty our output buffer. */ - state->stream.next_out = state->out_block; - state->stream.avail_out = state->out_block_size; - - /* Try to fill the output buffer. */ - 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; - - /* Decompress as much as we can in one pass. */ - ret = lzmadec_decode(&(state->stream), avail_in == 0); - switch (ret) { - case LZMADEC_STREAM_END: /* Found end of stream. */ - state->eof = 1; - /* FALL THROUGH */ - case LZMADEC_OK: /* Decompressor made some progress. */ - __archive_read_filter_consume(self->upstream, - avail_in - state->stream.avail_in); - break; - case LZMADEC_BUF_ERROR: /* Insufficient input data? */ - archive_set_error(&self->archive->archive, - ARCHIVE_ERRNO_MISC, - "Insufficient compressed data"); - return (ARCHIVE_FATAL); - default: - /* Return an error. */ - 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); -} - -/* - * Clean up the decompressor. - */ -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 - -/* - * - * If we have no suitable library on this system, we can't actually do - * the decompression. We can, however, still detect compressed - * archives and emit a useful message. - * - */ -static int -lzma_bidder_init(struct archive_read_filter *self) -{ - int r; - - r = __archive_read_program(self, "unlzma"); - /* Note: We set the format here even if __archive_read_program() - * above fails. We do, after all, know what the format is - * even if we weren't able to read it. */ - self->code = ARCHIVE_COMPRESSION_LZMA; - self->name = "lzma"; - return (r); -} - -#endif /* HAVE_LZMADEC_H */ - - -static int -xz_bidder_init(struct archive_read_filter *self) -{ - int r; - - r = __archive_read_program(self, "unxz"); - /* Note: We set the format here even if __archive_read_program() - * above fails. We do, after all, know what the format is - * even if we weren't able to read it. */ - self->code = ARCHIVE_COMPRESSION_XZ; - self->name = "xz"; - return (r); -} - - -#endif /* HAVE_LZMA_H */ |
