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-rw-r--r--archival/libarchive/decompress_bunzip2.c18
-rw-r--r--archival/libarchive/decompress_gunzip.c27
-rw-r--r--archival/libarchive/decompress_uncompress.c5
-rw-r--r--archival/libarchive/decompress_unlzma.c2
-rw-r--r--archival/libarchive/decompress_unxz.c12
-rw-r--r--archival/libarchive/get_header_tar.c35
-rw-r--r--archival/libarchive/get_header_tar_bz2.c2
-rw-r--r--archival/libarchive/get_header_tar_gz.c17
-rw-r--r--archival/libarchive/get_header_tar_lzma.c2
-rw-r--r--archival/libarchive/open_transformer.c113
10 files changed, 95 insertions, 138 deletions
diff --git a/archival/libarchive/decompress_bunzip2.c b/archival/libarchive/decompress_bunzip2.c
index c4640d489..dc252bb82 100644
--- a/archival/libarchive/decompress_bunzip2.c
+++ b/archival/libarchive/decompress_bunzip2.c
@@ -721,7 +721,7 @@ void FAST_FUNC dealloc_bunzip(bunzip_data *bd)
/* Decompress src_fd to dst_fd. Stops at end of bzip data, not end of file. */
IF_DESKTOP(long long) int FAST_FUNC
-unpack_bz2_stream(int src_fd, int dst_fd)
+unpack_bz2_stream(transformer_aux_data_t *aux, int src_fd, int dst_fd)
{
IF_DESKTOP(long long total_written = 0;)
bunzip_data *bd;
@@ -729,6 +729,9 @@ unpack_bz2_stream(int src_fd, int dst_fd)
int i;
unsigned len;
+ if (check_signature16(aux, src_fd, BZIP2_MAGIC))
+ return -1;
+
outbuf = xmalloc(IOBUF_SIZE);
len = 0;
while (1) { /* "Process one BZ... stream" loop */
@@ -794,17 +797,6 @@ unpack_bz2_stream(int src_fd, int dst_fd)
return i ? i : IF_DESKTOP(total_written) + 0;
}
-IF_DESKTOP(long long) int FAST_FUNC
-unpack_bz2_stream_prime(int src_fd, int dst_fd)
-{
- uint16_t magic2;
- xread(src_fd, &magic2, 2);
- if (magic2 != BZIP2_MAGIC) {
- bb_error_msg_and_die("invalid magic");
- }
- return unpack_bz2_stream(src_fd, dst_fd);
-}
-
#ifdef TESTING
static char *const bunzip_errors[] = {
@@ -819,7 +811,7 @@ int main(int argc, char **argv)
int i;
char c;
- int i = unpack_bz2_stream_prime(0, 1);
+ int i = unpack_bz2_stream(0, 1);
if (i < 0)
fprintf(stderr, "%s\n", bunzip_errors[-i]);
else if (read(STDIN_FILENO, &c, 1))
diff --git a/archival/libarchive/decompress_gunzip.c b/archival/libarchive/decompress_gunzip.c
index 50873e3f6..f1c9a79e5 100644
--- a/archival/libarchive/decompress_gunzip.c
+++ b/archival/libarchive/decompress_gunzip.c
@@ -1034,22 +1034,22 @@ inflate_unzip_internal(STATE_PARAM int in, int out)
/* For unzip */
IF_DESKTOP(long long) int FAST_FUNC
-inflate_unzip(inflate_unzip_result *res, off_t compr_size, int in, int out)
+inflate_unzip(transformer_aux_data_t *aux, int in, int out)
{
IF_DESKTOP(long long) int n;
DECLARE_STATE;
ALLOC_STATE;
- to_read = compr_size;
+ to_read = aux->bytes_in;
// bytebuffer_max = 0x8000;
bytebuffer_offset = 4;
bytebuffer = xmalloc(bytebuffer_max);
n = inflate_unzip_internal(PASS_STATE in, out);
free(bytebuffer);
- res->crc = gunzip_crc;
- res->bytes_out = gunzip_bytes_out;
+ aux->crc32 = gunzip_crc;
+ aux->bytes_out = gunzip_bytes_out;
DEALLOC_STATE;
return n;
}
@@ -1107,7 +1107,7 @@ static uint32_t buffer_read_le_u32(STATE_PARAM_ONLY)
return res;
}
-static int check_header_gzip(STATE_PARAM unpack_info_t *info)
+static int check_header_gzip(STATE_PARAM transformer_aux_data_t *aux)
{
union {
unsigned char raw[8];
@@ -1169,8 +1169,8 @@ static int check_header_gzip(STATE_PARAM unpack_info_t *info)
}
}
- if (info)
- info->mtime = SWAP_LE32(header.formatted.mtime);
+ if (aux)
+ aux->mtime = SWAP_LE32(header.formatted.mtime);
/* Read the header checksum */
if (header.formatted.flags & 0x02) {
@@ -1182,12 +1182,15 @@ static int check_header_gzip(STATE_PARAM unpack_info_t *info)
}
IF_DESKTOP(long long) int FAST_FUNC
-unpack_gz_stream_with_info(int src_fd, int dst_fd, unpack_info_t *info)
+unpack_gz_stream(transformer_aux_data_t *aux, int src_fd, int dst_fd)
{
uint32_t v32;
IF_DESKTOP(long long) int total, n;
DECLARE_STATE;
+ if (check_signature16(aux, src_fd, GZIP_MAGIC))
+ return -1;
+
total = 0;
ALLOC_STATE;
@@ -1197,7 +1200,7 @@ unpack_gz_stream_with_info(int src_fd, int dst_fd, unpack_info_t *info)
gunzip_src_fd = src_fd;
again:
- if (!check_header_gzip(PASS_STATE info)) {
+ if (!check_header_gzip(PASS_STATE aux)) {
bb_error_msg("corrupted data");
total = -1;
goto ret;
@@ -1248,9 +1251,3 @@ unpack_gz_stream_with_info(int src_fd, int dst_fd, unpack_info_t *info)
DEALLOC_STATE;
return total;
}
-
-IF_DESKTOP(long long) int FAST_FUNC
-unpack_gz_stream(int in, int out)
-{
- return unpack_gz_stream_with_info(in, out, NULL);
-}
diff --git a/archival/libarchive/decompress_uncompress.c b/archival/libarchive/decompress_uncompress.c
index 289f9e233..e9bbfb9bd 100644
--- a/archival/libarchive/decompress_uncompress.c
+++ b/archival/libarchive/decompress_uncompress.c
@@ -73,7 +73,7 @@
*/
IF_DESKTOP(long long) int FAST_FUNC
-unpack_Z_stream(int src_fd, int dst_fd)
+unpack_Z_stream(transformer_aux_data_t *aux, int src_fd, int dst_fd)
{
IF_DESKTOP(long long total_written = 0;)
IF_DESKTOP(long long) int retval = -1;
@@ -103,6 +103,9 @@ unpack_Z_stream(int src_fd, int dst_fd)
/* block compress mode -C compatible with 2.0 */
int block_mode; /* = BLOCK_MODE; */
+ if (check_signature16(aux, src_fd, COMPRESS_MAGIC))
+ return -1;
+
inbuf = xzalloc(IBUFSIZ + 64);
outbuf = xzalloc(OBUFSIZ + 2048);
htab = xzalloc(HSIZE); /* wasn't zeroed out before, maybe can xmalloc? */
diff --git a/archival/libarchive/decompress_unlzma.c b/archival/libarchive/decompress_unlzma.c
index 3631b50cc..cfde8ea56 100644
--- a/archival/libarchive/decompress_unlzma.c
+++ b/archival/libarchive/decompress_unlzma.c
@@ -213,7 +213,7 @@ enum {
IF_DESKTOP(long long) int FAST_FUNC
-unpack_lzma_stream(int src_fd, int dst_fd)
+unpack_lzma_stream(transformer_aux_data_t *aux UNUSED_PARAM, int src_fd, int dst_fd)
{
IF_DESKTOP(long long total_written = 0;)
lzma_header_t header;
diff --git a/archival/libarchive/decompress_unxz.c b/archival/libarchive/decompress_unxz.c
index 3e5d4edca..79b48a152 100644
--- a/archival/libarchive/decompress_unxz.c
+++ b/archival/libarchive/decompress_unxz.c
@@ -38,7 +38,7 @@ static uint32_t xz_crc32(const uint8_t *buf, size_t size, uint32_t crc)
#include "unxz/xz_dec_stream.c"
IF_DESKTOP(long long) int FAST_FUNC
-unpack_xz_stream(int src_fd, int dst_fd)
+unpack_xz_stream(transformer_aux_data_t *aux, int src_fd, int dst_fd)
{
struct xz_buf iobuf;
struct xz_dec *state;
@@ -49,13 +49,17 @@ unpack_xz_stream(int src_fd, int dst_fd)
global_crc32_table = crc32_filltable(NULL, /*endian:*/ 0);
memset(&iobuf, 0, sizeof(iobuf));
- /* Preload XZ file signature */
- membuf = (void*) strcpy(xmalloc(2 * BUFSIZ), HEADER_MAGIC);
+ membuf = xmalloc(2 * BUFSIZ);
iobuf.in = membuf;
- iobuf.in_size = HEADER_MAGIC_SIZE;
iobuf.out = membuf + BUFSIZ;
iobuf.out_size = BUFSIZ;
+ if (!aux || aux->check_signature == 0) {
+ /* Preload XZ file signature */
+ strcpy((char*)membuf, HEADER_MAGIC);
+ iobuf.in_size = HEADER_MAGIC_SIZE;
+ } /* else: let xz code read & check it */
+
/* Limit memory usage to about 64 MiB. */
state = xz_dec_init(XZ_DYNALLOC, 64*1024*1024);
diff --git a/archival/libarchive/get_header_tar.c b/archival/libarchive/get_header_tar.c
index 8c699754b..80a709144 100644
--- a/archival/libarchive/get_header_tar.c
+++ b/archival/libarchive/get_header_tar.c
@@ -235,43 +235,18 @@ char FAST_FUNC get_header_tar(archive_handle_t *archive_handle)
|| memcmp(tar.magic, "\0\0\0\0", 5) != 0)
) {
#if ENABLE_FEATURE_TAR_AUTODETECT
- char FAST_FUNC (*get_header_ptr)(archive_handle_t *);
- uint16_t magic2;
-
autodetect:
- magic2 = *(bb__aliased_uint16_t*)tar.name;
- /* tar gz/bz autodetect: check for gz/bz2 magic.
- * If we see the magic, and it is the very first block,
- * we can switch to get_header_tar_gz/bz2/lzma().
- * Needs seekable fd. I wish recv(MSG_PEEK) works
- * on any fd... */
-# if ENABLE_FEATURE_SEAMLESS_GZ
- if (magic2 == GZIP_MAGIC) {
- get_header_ptr = get_header_tar_gz;
- } else
-# endif
-# if ENABLE_FEATURE_SEAMLESS_BZ2
- if (magic2 == BZIP2_MAGIC
- && tar.name[2] == 'h' && isdigit(tar.name[3])
- ) { /* bzip2 */
- get_header_ptr = get_header_tar_bz2;
- } else
-# endif
-# if ENABLE_FEATURE_SEAMLESS_XZ
- //TODO: if (magic2 == XZ_MAGIC1)...
- //else
-# endif
- goto err;
/* Two different causes for lseek() != 0:
* unseekable fd (would like to support that too, but...),
* or not first block (false positive, it's not .gz/.bz2!) */
if (lseek(archive_handle->src_fd, -i, SEEK_CUR) != 0)
goto err;
- while (get_header_ptr(archive_handle) == EXIT_SUCCESS)
- continue;
- return EXIT_FAILURE;
+ if (setup_unzip_on_fd(archive_handle->src_fd, /*fail_if_not_detected:*/ 0) != 0)
err:
-#endif /* FEATURE_TAR_AUTODETECT */
+ bb_error_msg_and_die("invalid tar magic");
+ archive_handle->offset = 0;
+ goto again_after_align;
+#endif
bb_error_msg_and_die("invalid tar magic");
}
diff --git a/archival/libarchive/get_header_tar_bz2.c b/archival/libarchive/get_header_tar_bz2.c
index e012dec3b..0ee00df53 100644
--- a/archival/libarchive/get_header_tar_bz2.c
+++ b/archival/libarchive/get_header_tar_bz2.c
@@ -11,7 +11,7 @@ char FAST_FUNC get_header_tar_bz2(archive_handle_t *archive_handle)
/* Can't lseek over pipes */
archive_handle->seek = seek_by_read;
- open_transformer(archive_handle->src_fd, unpack_bz2_stream_prime, "bunzip2");
+ open_transformer_with_sig(archive_handle->src_fd, unpack_bz2_stream, "bunzip2");
archive_handle->offset = 0;
while (get_header_tar(archive_handle) == EXIT_SUCCESS)
continue;
diff --git a/archival/libarchive/get_header_tar_gz.c b/archival/libarchive/get_header_tar_gz.c
index b9679b0bd..03284342b 100644
--- a/archival/libarchive/get_header_tar_gz.c
+++ b/archival/libarchive/get_header_tar_gz.c
@@ -8,25 +8,10 @@
char FAST_FUNC get_header_tar_gz(archive_handle_t *archive_handle)
{
-#if BB_MMU
- uint16_t magic;
-#endif
-
/* Can't lseek over pipes */
archive_handle->seek = seek_by_read;
- /* Check gzip magic only if open_transformer will invoke unpack_gz_stream (MMU case).
- * Otherwise, it will invoke an external helper "gunzip -cf" (NOMMU case) which will
- * need the header. */
-#if BB_MMU
- xread(archive_handle->src_fd, &magic, 2);
- /* Can skip this check, but error message will be less clear */
- if (magic != GZIP_MAGIC) {
- bb_error_msg_and_die("invalid gzip magic");
- }
-#endif
-
- open_transformer(archive_handle->src_fd, unpack_gz_stream, "gunzip");
+ open_transformer_with_sig(archive_handle->src_fd, unpack_gz_stream, "gunzip");
archive_handle->offset = 0;
while (get_header_tar(archive_handle) == EXIT_SUCCESS)
continue;
diff --git a/archival/libarchive/get_header_tar_lzma.c b/archival/libarchive/get_header_tar_lzma.c
index 666700729..d565a217d 100644
--- a/archival/libarchive/get_header_tar_lzma.c
+++ b/archival/libarchive/get_header_tar_lzma.c
@@ -14,7 +14,7 @@ char FAST_FUNC get_header_tar_lzma(archive_handle_t *archive_handle)
/* Can't lseek over pipes */
archive_handle->seek = seek_by_read;
- open_transformer(archive_handle->src_fd, unpack_lzma_stream, "unlzma");
+ open_transformer_with_sig(archive_handle->src_fd, unpack_lzma_stream, "unlzma");
archive_handle->offset = 0;
while (get_header_tar(archive_handle) == EXIT_SUCCESS)
continue;
diff --git a/archival/libarchive/open_transformer.c b/archival/libarchive/open_transformer.c
index 743ffee02..693ae9995 100644
--- a/archival/libarchive/open_transformer.c
+++ b/archival/libarchive/open_transformer.c
@@ -6,24 +6,36 @@
#include "libbb.h"
#include "bb_archive.h"
-#define ZIPPED (ENABLE_FEATURE_SEAMLESS_LZMA \
- || ENABLE_FEATURE_SEAMLESS_BZ2 \
- || ENABLE_FEATURE_SEAMLESS_GZ \
- /* || ENABLE_FEATURE_SEAMLESS_Z */ \
-)
+void FAST_FUNC init_transformer_aux_data(transformer_aux_data_t *aux)
+{
+ memset(aux, 0, sizeof(*aux));
+}
-#if ZIPPED
-# include "bb_archive.h"
+int FAST_FUNC check_signature16(transformer_aux_data_t *aux, int src_fd, unsigned magic16)
+{
+ if (aux && aux->check_signature) {
+ uint16_t magic2;
+ if (full_read(src_fd, &magic2, 2) != 2 || magic2 != magic16) {
+ bb_error_msg("invalid magic");
+#if 0 /* possible future extension */
+ if (aux->check_signature > 1)
+ xfunc_die();
#endif
+ return -1;
+ }
+ }
+ return 0;
+}
/* transformer(), more than meets the eye */
-/*
- * On MMU machine, the transform_prog is removed by macro magic
- * in include/archive.h. On NOMMU, transformer is removed.
- */
+#if BB_MMU
void FAST_FUNC open_transformer(int fd,
- IF_DESKTOP(long long) int FAST_FUNC (*transformer)(int src_fd, int dst_fd),
- const char *transform_prog)
+ int check_signature,
+ IF_DESKTOP(long long) int FAST_FUNC (*transformer)(transformer_aux_data_t *aux, int src_fd, int dst_fd)
+)
+#else
+void FAST_FUNC open_transformer(int fd, const char *transform_prog)
+#endif
{
struct fd_pair fd_pipe;
int pid;
@@ -35,13 +47,18 @@ void FAST_FUNC open_transformer(int fd,
close(fd_pipe.rd); /* we don't want to read from the parent */
// FIXME: error check?
#if BB_MMU
- transformer(fd, fd_pipe.wr);
- if (ENABLE_FEATURE_CLEAN_UP) {
- close(fd_pipe.wr); /* send EOF */
- close(fd);
+ {
+ transformer_aux_data_t aux;
+ init_transformer_aux_data(&aux);
+ aux.check_signature = check_signature;
+ transformer(&aux, fd, fd_pipe.wr);
+ if (ENABLE_FEATURE_CLEAN_UP) {
+ close(fd_pipe.wr); /* send EOF */
+ close(fd);
+ }
+ /* must be _exit! bug was actually seen here */
+ _exit(EXIT_SUCCESS);
}
- /* must be _exit! bug was actually seen here */
- _exit(EXIT_SUCCESS);
#else
{
char *argv[4];
@@ -64,26 +81,21 @@ void FAST_FUNC open_transformer(int fd,
}
+#if SEAMLESS_COMPRESSION
+
/* Used by e.g. rpm which gives us a fd without filename,
* thus we can't guess the format from filename's extension.
*/
-#if ZIPPED
-void FAST_FUNC setup_unzip_on_fd(int fd /*, int fail_if_not_detected*/)
+int FAST_FUNC setup_unzip_on_fd(int fd, int fail_if_not_detected)
{
- const int fail_if_not_detected = 1;
union {
uint8_t b[4];
uint16_t b16[2];
uint32_t b32[1];
} magic;
int offset = -2;
-# if BB_MMU
- IF_DESKTOP(long long) int FAST_FUNC (*xformer)(int src_fd, int dst_fd);
- enum { xformer_prog = 0 };
-# else
- enum { xformer = 0 };
- const char *xformer_prog;
-# endif
+ USE_FOR_MMU(IF_DESKTOP(long long) int FAST_FUNC (*xformer)(transformer_aux_data_t *aux, int src_fd, int dst_fd);)
+ USE_FOR_NOMMU(const char *xformer_prog;)
/* .gz and .bz2 both have 2-byte signature, and their
* unpack_XXX_stream wants this header skipped. */
@@ -91,21 +103,15 @@ void FAST_FUNC setup_unzip_on_fd(int fd /*, int fail_if_not_detected*/)
if (ENABLE_FEATURE_SEAMLESS_GZ
&& magic.b16[0] == GZIP_MAGIC
) {
-# if BB_MMU
- xformer = unpack_gz_stream;
-# else
- xformer_prog = "gunzip";
-# endif
+ USE_FOR_MMU(xformer = unpack_gz_stream;)
+ USE_FOR_NOMMU(xformer_prog = "gunzip";)
goto found_magic;
}
if (ENABLE_FEATURE_SEAMLESS_BZ2
&& magic.b16[0] == BZIP2_MAGIC
) {
-# if BB_MMU
- xformer = unpack_bz2_stream;
-# else
- xformer_prog = "bunzip2";
-# endif
+ USE_FOR_MMU(xformer = unpack_bz2_stream;)
+ USE_FOR_NOMMU(xformer_prog = "bunzip2";)
goto found_magic;
}
if (ENABLE_FEATURE_SEAMLESS_XZ
@@ -114,13 +120,8 @@ void FAST_FUNC setup_unzip_on_fd(int fd /*, int fail_if_not_detected*/)
offset = -6;
xread(fd, magic.b32, sizeof(magic.b32[0]));
if (magic.b32[0] == XZ_MAGIC2) {
-# if BB_MMU
- xformer = unpack_xz_stream;
- /* unpack_xz_stream wants fd at position 6, no need to seek */
- //xlseek(fd, offset, SEEK_CUR);
-# else
- xformer_prog = "unxz";
-# endif
+ USE_FOR_MMU(xformer = unpack_xz_stream;)
+ USE_FOR_NOMMU(xformer_prog = "unxz";)
goto found_magic;
}
}
@@ -132,24 +133,23 @@ void FAST_FUNC setup_unzip_on_fd(int fd /*, int fail_if_not_detected*/)
IF_FEATURE_SEAMLESS_XZ("/xz")
" magic");
xlseek(fd, offset, SEEK_CUR);
- return;
+ return 1;
found_magic:
-# if !BB_MMU
+# if BB_MMU
+ open_transformer_with_no_sig(fd, xformer);
+# else
/* NOMMU version of open_transformer execs
* an external unzipper that wants
* file position at the start of the file */
xlseek(fd, offset, SEEK_CUR);
+ open_transformer_with_sig(fd, xformer, xformer_prog);
# endif
- open_transformer(fd, xformer, xformer_prog);
+ return 0;
}
-#endif /* ZIPPED */
int FAST_FUNC open_zipped(const char *fname)
{
-#if !ZIPPED
- return open(fname, O_RDONLY);
-#else
char *sfx;
int fd;
@@ -162,20 +162,21 @@ int FAST_FUNC open_zipped(const char *fname)
sfx++;
if (ENABLE_FEATURE_SEAMLESS_LZMA && strcmp(sfx, "lzma") == 0)
/* .lzma has no header/signature, just trust it */
- open_transformer(fd, unpack_lzma_stream, "unlzma");
+ open_transformer_with_sig(fd, unpack_lzma_stream, "unlzma");
else
if ((ENABLE_FEATURE_SEAMLESS_GZ && strcmp(sfx, "gz") == 0)
|| (ENABLE_FEATURE_SEAMLESS_BZ2 && strcmp(sfx, "bz2") == 0)
|| (ENABLE_FEATURE_SEAMLESS_XZ && strcmp(sfx, "xz") == 0)
) {
- setup_unzip_on_fd(fd /*, fail_if_not_detected: 1*/);
+ setup_unzip_on_fd(fd, /*fail_if_not_detected:*/ 1);
}
}
return fd;
-#endif
}
+#endif /* SEAMLESS_COMPRESSION */
+
void* FAST_FUNC xmalloc_open_zipped_read_close(const char *fname, size_t *maxsz_p)
{
int fd;
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-02 14:12:09 +0000