diff options
| -rw-r--r-- | archive-zip.c | 215 | ||||
| -rwxr-xr-x | t/t5004-archive-corner-cases.sh | 50 | ||||
| -rw-r--r-- | t/t5004/big-pack.zip | bin | 0 -> 7373 bytes |
3 files changed, 181 insertions, 84 deletions
diff --git a/archive-zip.c b/archive-zip.c index b429a8d974..e81c5ac15a 100644 --- a/archive-zip.c +++ b/archive-zip.c @@ -11,16 +11,14 @@ static int zip_date; static int zip_time; -static unsigned char *zip_dir; -static unsigned int zip_dir_size; +/* We only care about the "buf" part here. */ +static struct strbuf zip_dir; -static unsigned int zip_offset; -static unsigned int zip_dir_offset; +static uintmax_t zip_offset; static uint64_t zip_dir_entries; static unsigned int max_creator_version; -#define ZIP_DIRECTORY_MIN_SIZE (1024 * 1024) #define ZIP_STREAM (1 << 3) #define ZIP_UTF8 (1 << 11) @@ -47,24 +45,11 @@ struct zip_data_desc { unsigned char _end[1]; }; -struct zip_dir_header { +struct zip64_data_desc { unsigned char magic[4]; - unsigned char creator_version[2]; - unsigned char version[2]; - unsigned char flags[2]; - unsigned char compression_method[2]; - unsigned char mtime[2]; - unsigned char mdate[2]; unsigned char crc32[4]; - unsigned char compressed_size[4]; - unsigned char size[4]; - unsigned char filename_length[2]; - unsigned char extra_length[2]; - unsigned char comment_length[2]; - unsigned char disk[2]; - unsigned char attr1[2]; - unsigned char attr2[4]; - unsigned char offset[4]; + unsigned char compressed_size[8]; + unsigned char size[8]; unsigned char _end[1]; }; @@ -88,6 +73,14 @@ struct zip_extra_mtime { unsigned char _end[1]; }; +struct zip64_extra { + unsigned char magic[2]; + unsigned char extra_size[2]; + unsigned char size[8]; + unsigned char compressed_size[8]; + unsigned char _end[1]; +}; + struct zip64_dir_trailer { unsigned char magic[4]; unsigned char record_size[8]; @@ -117,11 +110,15 @@ struct zip64_dir_trailer_locator { */ #define ZIP_LOCAL_HEADER_SIZE offsetof(struct zip_local_header, _end) #define ZIP_DATA_DESC_SIZE offsetof(struct zip_data_desc, _end) +#define ZIP64_DATA_DESC_SIZE offsetof(struct zip64_data_desc, _end) #define ZIP_DIR_HEADER_SIZE offsetof(struct zip_dir_header, _end) #define ZIP_DIR_TRAILER_SIZE offsetof(struct zip_dir_trailer, _end) #define ZIP_EXTRA_MTIME_SIZE offsetof(struct zip_extra_mtime, _end) #define ZIP_EXTRA_MTIME_PAYLOAD_SIZE \ (ZIP_EXTRA_MTIME_SIZE - offsetof(struct zip_extra_mtime, flags)) +#define ZIP64_EXTRA_SIZE offsetof(struct zip64_extra, _end) +#define ZIP64_EXTRA_PAYLOAD_SIZE \ + (ZIP64_EXTRA_SIZE - offsetof(struct zip64_extra, size)) #define ZIP64_DIR_TRAILER_SIZE offsetof(struct zip64_dir_trailer, _end) #define ZIP64_DIR_TRAILER_RECORD_SIZE \ (ZIP64_DIR_TRAILER_SIZE - \ @@ -168,6 +165,26 @@ static void copy_le16_clamp(unsigned char *dest, uint64_t n, int *clamped) copy_le16(dest, clamp_max(n, 0xffff, clamped)); } +static void copy_le32_clamp(unsigned char *dest, uint64_t n, int *clamped) +{ + copy_le32(dest, clamp_max(n, 0xffffffff, clamped)); +} + +static int strbuf_add_le(struct strbuf *sb, size_t size, uintmax_t n) +{ + while (size-- > 0) { + strbuf_addch(sb, n & 0xff); + n >>= 8; + } + return -!!n; +} + +static uint32_t clamp32(uintmax_t n) +{ + const uintmax_t max = 0xffffffff; + return (n < max) ? n : max; +} + static void *zlib_deflate_raw(void *data, unsigned long size, int compression_level, unsigned long *compressed_size) @@ -205,23 +222,23 @@ static void write_zip_data_desc(unsigned long size, unsigned long compressed_size, unsigned long crc) { - struct zip_data_desc trailer; - - copy_le32(trailer.magic, 0x08074b50); - copy_le32(trailer.crc32, crc); - copy_le32(trailer.compressed_size, compressed_size); - copy_le32(trailer.size, size); - write_or_die(1, &trailer, ZIP_DATA_DESC_SIZE); -} - -static void set_zip_dir_data_desc(struct zip_dir_header *header, - unsigned long size, - unsigned long compressed_size, - unsigned long crc) -{ - copy_le32(header->crc32, crc); - copy_le32(header->compressed_size, compressed_size); - copy_le32(header->size, size); + if (size >= 0xffffffff || compressed_size >= 0xffffffff) { + struct zip64_data_desc trailer; + copy_le32(trailer.magic, 0x08074b50); + copy_le32(trailer.crc32, crc); + copy_le64(trailer.compressed_size, compressed_size); + copy_le64(trailer.size, size); + write_or_die(1, &trailer, ZIP64_DATA_DESC_SIZE); + zip_offset += ZIP64_DATA_DESC_SIZE; + } else { + struct zip_data_desc trailer; + copy_le32(trailer.magic, 0x08074b50); + copy_le32(trailer.crc32, crc); + copy_le32(trailer.compressed_size, compressed_size); + copy_le32(trailer.size, size); + write_or_die(1, &trailer, ZIP_DATA_DESC_SIZE); + zip_offset += ZIP_DATA_DESC_SIZE; + } } static void set_zip_header_data_desc(struct zip_local_header *header, @@ -263,12 +280,14 @@ static int write_zip_entry(struct archiver_args *args, unsigned int mode) { struct zip_local_header header; - struct zip_dir_header dirent; + uintmax_t offset = zip_offset; struct zip_extra_mtime extra; + struct zip64_extra extra64; + size_t header_extra_size = ZIP_EXTRA_MTIME_SIZE; + int need_zip64_extra = 0; unsigned long attr2; unsigned long compressed_size; unsigned long crc; - unsigned long direntsize; int method; unsigned char *out; void *deflated = NULL; @@ -279,6 +298,9 @@ static int write_zip_entry(struct archiver_args *args, int is_binary = -1; const char *path_without_prefix = path + args->baselen; unsigned int creator_version = 0; + unsigned int version_needed = 10; + size_t zip_dir_extra_size = ZIP_EXTRA_MTIME_SIZE; + size_t zip64_dir_extra_payload_size = 0; crc = crc32(0, NULL, 0); @@ -356,43 +378,43 @@ static int write_zip_entry(struct archiver_args *args, extra.flags[0] = 1; /* just mtime */ copy_le32(extra.mtime, args->time); - /* make sure we have enough free space in the dictionary */ - direntsize = ZIP_DIR_HEADER_SIZE + pathlen + ZIP_EXTRA_MTIME_SIZE; - while (zip_dir_size < zip_dir_offset + direntsize) { - zip_dir_size += ZIP_DIRECTORY_MIN_SIZE; - zip_dir = xrealloc(zip_dir, zip_dir_size); - } + if (size > 0xffffffff || compressed_size > 0xffffffff) + need_zip64_extra = 1; + if (stream && size > 0x7fffffff) + need_zip64_extra = 1; - copy_le32(dirent.magic, 0x02014b50); - copy_le16(dirent.creator_version, creator_version); - copy_le16(dirent.version, 10); - copy_le16(dirent.flags, flags); - copy_le16(dirent.compression_method, method); - copy_le16(dirent.mtime, zip_time); - copy_le16(dirent.mdate, zip_date); - set_zip_dir_data_desc(&dirent, size, compressed_size, crc); - copy_le16(dirent.filename_length, pathlen); - copy_le16(dirent.extra_length, ZIP_EXTRA_MTIME_SIZE); - copy_le16(dirent.comment_length, 0); - copy_le16(dirent.disk, 0); - copy_le32(dirent.attr2, attr2); - copy_le32(dirent.offset, zip_offset); + if (need_zip64_extra) + version_needed = 45; copy_le32(header.magic, 0x04034b50); - copy_le16(header.version, 10); + copy_le16(header.version, version_needed); copy_le16(header.flags, flags); copy_le16(header.compression_method, method); copy_le16(header.mtime, zip_time); copy_le16(header.mdate, zip_date); - set_zip_header_data_desc(&header, size, compressed_size, crc); + if (need_zip64_extra) { + set_zip_header_data_desc(&header, 0xffffffff, 0xffffffff, crc); + header_extra_size += ZIP64_EXTRA_SIZE; + } else { + set_zip_header_data_desc(&header, size, compressed_size, crc); + } copy_le16(header.filename_length, pathlen); - copy_le16(header.extra_length, ZIP_EXTRA_MTIME_SIZE); + copy_le16(header.extra_length, header_extra_size); write_or_die(1, &header, ZIP_LOCAL_HEADER_SIZE); zip_offset += ZIP_LOCAL_HEADER_SIZE; write_or_die(1, path, pathlen); zip_offset += pathlen; write_or_die(1, &extra, ZIP_EXTRA_MTIME_SIZE); zip_offset += ZIP_EXTRA_MTIME_SIZE; + if (need_zip64_extra) { + copy_le16(extra64.magic, 0x0001); + copy_le16(extra64.extra_size, ZIP64_EXTRA_PAYLOAD_SIZE); + copy_le64(extra64.size, size); + copy_le64(extra64.compressed_size, compressed_size); + write_or_die(1, &extra64, ZIP64_EXTRA_SIZE); + zip_offset += ZIP64_EXTRA_SIZE; + } + if (stream && method == 0) { unsigned char buf[STREAM_BUFFER_SIZE]; ssize_t readlen; @@ -415,9 +437,6 @@ static int write_zip_entry(struct archiver_args *args, zip_offset += compressed_size; write_zip_data_desc(size, compressed_size, crc); - zip_offset += ZIP_DATA_DESC_SIZE; - - set_zip_dir_data_desc(&dirent, size, compressed_size, crc); } else if (stream && method == 8) { unsigned char buf[STREAM_BUFFER_SIZE]; ssize_t readlen; @@ -473,9 +492,6 @@ static int write_zip_entry(struct archiver_args *args, zip_offset += compressed_size; write_zip_data_desc(size, compressed_size, crc); - zip_offset += ZIP_DATA_DESC_SIZE; - - set_zip_dir_data_desc(&dirent, size, compressed_size, crc); } else if (compressed_size > 0) { write_or_die(1, out, compressed_size); zip_offset += compressed_size; @@ -484,14 +500,46 @@ static int write_zip_entry(struct archiver_args *args, free(deflated); free(buffer); - copy_le16(dirent.attr1, !is_binary); + if (compressed_size > 0xffffffff || size > 0xffffffff || + offset > 0xffffffff) { + if (compressed_size >= 0xffffffff) + zip64_dir_extra_payload_size += 8; + if (size >= 0xffffffff) + zip64_dir_extra_payload_size += 8; + if (offset >= 0xffffffff) + zip64_dir_extra_payload_size += 8; + zip_dir_extra_size += 2 + 2 + zip64_dir_extra_payload_size; + } - memcpy(zip_dir + zip_dir_offset, &dirent, ZIP_DIR_HEADER_SIZE); - zip_dir_offset += ZIP_DIR_HEADER_SIZE; - memcpy(zip_dir + zip_dir_offset, path, pathlen); - zip_dir_offset += pathlen; - memcpy(zip_dir + zip_dir_offset, &extra, ZIP_EXTRA_MTIME_SIZE); - zip_dir_offset += ZIP_EXTRA_MTIME_SIZE; + strbuf_add_le(&zip_dir, 4, 0x02014b50); /* magic */ + strbuf_add_le(&zip_dir, 2, creator_version); + strbuf_add_le(&zip_dir, 2, version_needed); + strbuf_add_le(&zip_dir, 2, flags); + strbuf_add_le(&zip_dir, 2, method); + strbuf_add_le(&zip_dir, 2, zip_time); + strbuf_add_le(&zip_dir, 2, zip_date); + strbuf_add_le(&zip_dir, 4, crc); + strbuf_add_le(&zip_dir, 4, clamp32(compressed_size)); + strbuf_add_le(&zip_dir, 4, clamp32(size)); + strbuf_add_le(&zip_dir, 2, pathlen); + strbuf_add_le(&zip_dir, 2, zip_dir_extra_size); + strbuf_add_le(&zip_dir, 2, 0); /* comment length */ + strbuf_add_le(&zip_dir, 2, 0); /* disk */ + strbuf_add_le(&zip_dir, 2, !is_binary); + strbuf_add_le(&zip_dir, 4, attr2); + strbuf_add_le(&zip_dir, 4, clamp32(offset)); + strbuf_add(&zip_dir, path, pathlen); + strbuf_add(&zip_dir, &extra, ZIP_EXTRA_MTIME_SIZE); + if (zip64_dir_extra_payload_size) { + strbuf_add_le(&zip_dir, 2, 0x0001); /* magic */ + strbuf_add_le(&zip_dir, 2, zip64_dir_extra_payload_size); + if (size >= 0xffffffff) + strbuf_add_le(&zip_dir, 8, size); + if (compressed_size >= 0xffffffff) + strbuf_add_le(&zip_dir, 8, compressed_size); + if (offset >= 0xffffffff) + strbuf_add_le(&zip_dir, 8, offset); + } zip_dir_entries++; return 0; @@ -510,12 +558,12 @@ static void write_zip64_trailer(void) copy_le32(trailer64.directory_start_disk, 0); copy_le64(trailer64.entries_on_this_disk, zip_dir_entries); copy_le64(trailer64.entries, zip_dir_entries); - copy_le64(trailer64.size, zip_dir_offset); + copy_le64(trailer64.size, zip_dir.len); copy_le64(trailer64.offset, zip_offset); copy_le32(locator64.magic, 0x07064b50); copy_le32(locator64.disk, 0); - copy_le64(locator64.offset, zip_offset + zip_dir_offset); + copy_le64(locator64.offset, zip_offset + zip_dir.len); copy_le32(locator64.number_of_disks, 1); write_or_die(1, &trailer64, ZIP64_DIR_TRAILER_SIZE); @@ -533,11 +581,11 @@ static void write_zip_trailer(const unsigned char *sha1) copy_le16_clamp(trailer.entries_on_this_disk, zip_dir_entries, &clamped); copy_le16_clamp(trailer.entries, zip_dir_entries, &clamped); - copy_le32(trailer.size, zip_dir_offset); - copy_le32(trailer.offset, zip_offset); + copy_le32(trailer.size, zip_dir.len); + copy_le32_clamp(trailer.offset, zip_offset, &clamped); copy_le16(trailer.comment_length, sha1 ? GIT_SHA1_HEXSZ : 0); - write_or_die(1, zip_dir, zip_dir_offset); + write_or_die(1, zip_dir.buf, zip_dir.len); if (clamped) write_zip64_trailer(); write_or_die(1, &trailer, ZIP_DIR_TRAILER_SIZE); @@ -568,14 +616,13 @@ static int write_zip_archive(const struct archiver *ar, dos_time(&args->time, &zip_date, &zip_time); - zip_dir = xmalloc(ZIP_DIRECTORY_MIN_SIZE); - zip_dir_size = ZIP_DIRECTORY_MIN_SIZE; + strbuf_init(&zip_dir, 0); err = write_archive_entries(args, write_zip_entry); if (!err) write_zip_trailer(args->commit_sha1); - free(zip_dir); + strbuf_release(&zip_dir); return err; } diff --git a/t/t5004-archive-corner-cases.sh b/t/t5004-archive-corner-cases.sh index cca23383c5..f6207f42b5 100755 --- a/t/t5004-archive-corner-cases.sh +++ b/t/t5004-archive-corner-cases.sh @@ -27,6 +27,9 @@ check_dir() { test_cmp expect actual } +test_lazy_prereq UNZIP_ZIP64_SUPPORT ' + "$GIT_UNZIP" -v | grep ZIP64_SUPPORT +' # bsdtar/libarchive versions before 3.1.3 consider a tar file with a # global pax header that is not followed by a file record as corrupt. @@ -155,4 +158,51 @@ test_expect_success ZIPINFO 'zip archive with many entries' ' test_cmp expect actual ' +test_expect_success EXPENSIVE,UNZIP,UNZIP_ZIP64_SUPPORT \ + 'zip archive bigger than 4GB' ' + # build string containing 65536 characters + s=0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef && + s=$s$s$s$s$s$s$s$s$s$s$s$s$s$s$s$s$s$s$s$s$s$s$s$s$s$s$s$s$s$s$s$s && + s=$s$s$s$s$s$s$s$s$s$s$s$s$s$s$s$s$s$s$s$s$s$s$s$s$s$s$s$s$s$s$s$s && + + # create blob with a length of 65536 + 1 bytes + blob=$(echo $s | git hash-object -w --stdin) && + + # create tree containing 65500 entries of that blob + for i in $(test_seq 1 65500) + do + echo "100644 blob $blob $i" + done >tree && + tree=$(git mktree <tree) && + + # zip it, creating an archive a bit bigger than 4GB + git archive -0 -o many-big.zip $tree && + + "$GIT_UNZIP" -t many-big.zip 9999 65500 && + "$GIT_UNZIP" -t many-big.zip +' + +test_expect_success EXPENSIVE,LONG_IS_64BIT,UNZIP,UNZIP_ZIP64_SUPPORT,ZIPINFO \ + 'zip archive with files bigger than 4GB' ' + # Pack created with: + # dd if=/dev/zero of=file bs=1M count=4100 && git hash-object -w file + mkdir -p .git/objects/pack && + ( + cd .git/objects/pack && + "$GIT_UNZIP" "$TEST_DIRECTORY"/t5004/big-pack.zip + ) && + blob=754a93d6fada4c6873360e6cb4b209132271ab0e && + size=$(expr 4100 "*" 1024 "*" 1024) && + + # create a tree containing the file + tree=$(echo "100644 blob $blob big-file" | git mktree) && + + # zip it, creating an archive with a file bigger than 4GB + git archive -o big.zip $tree && + + "$GIT_UNZIP" -t big.zip && + "$ZIPINFO" big.zip >big.lst && + grep $size big.lst +' + test_done diff --git a/t/t5004/big-pack.zip b/t/t5004/big-pack.zip Binary files differnew file mode 100644 index 0000000000..caaf614eee --- /dev/null +++ b/t/t5004/big-pack.zip |