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Only write zip64 disk_offset in central directory record.

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Change posix mz_stream_os_open to w+b because when we update the zip64 sizes we read/write.

Co-authored-by: Vlad Lipskiy <eswcvlad@yahoo.com>
This commit is contained in:
Nathan Moinvaziri 2020-12-23 11:14:59 -08:00
parent 50150e0ea3
commit 3d83acda02
2 changed files with 24 additions and 16 deletions
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2
mz_strm_os_posix.c
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@ -79,7 +79,7 @@ int32_t mz_stream_os_open(void *stream, const char *path, int32_t mode) {
else if (mode & MZ_OPEN_MODE_APPEND)
mode_fopen = "r+b";
else if (mode & MZ_OPEN_MODE_CREATE)
mode_fopen = "wb";
mode_fopen = "w+b";
else
return MZ_OPEN_ERROR;

38
mz_zip.c
View File

@ -614,7 +614,9 @@ static int32_t mz_zip_entry_write_header(void *stream, uint8_t local, mz_zip_fil
/* Start calculating extra field sizes */
if (zip64) {
field_length_zip64 = 8 + 8 + 8;
field_length_zip64 = 8 + 8;
if ((!local) && (file_info->disk_offset >= UINT32_MAX))
field_length_zip64 += 8;
extrafield_size += 4;
extrafield_size += field_length_zip64;
@ -756,7 +758,7 @@ static int32_t mz_zip_entry_write_header(void *stream, uint8_t local, mz_zip_fil
if (err == MZ_OK)
err = mz_stream_write_uint32(stream, file_info->external_fa);
if (err == MZ_OK) {
if (zip64)
if (file_info->disk_offset >= UINT32_MAX)
err = mz_stream_write_uint32(stream, UINT32_MAX);
else
err = mz_stream_write_uint32(stream, (uint32_t)file_info->disk_offset);
@ -809,7 +811,7 @@ static int32_t mz_zip_entry_write_header(void *stream, uint8_t local, mz_zip_fil
}
if (err == MZ_OK)
err = mz_stream_write_int64(stream, file_info->compressed_size);
if (err == MZ_OK)
if ((err == MZ_OK) && (!local) && (file_info->disk_offset >= UINT32_MAX))
err = mz_stream_write_int64(stream, file_info->disk_offset);
}
/* Write NTFS extra field */
@ -2153,24 +2155,30 @@ int32_t mz_zip_entry_write_close(void *handle, uint32_t crc32, int64_t compresse
err = mz_zip_entry_write_crc_sizes(zip->stream, zip64, 0, &zip->file_info);
/* Seek to and update zip64 extension sizes */
if ((err == MZ_OK) && (zip64) && (zip->file_info.extrafield_size > 0)) {
if ((err == MZ_OK) && (zip64)) {
uint16_t length = 0;
uint64_t filename_size = zip->file_info.filename_size;
uint16_t filename_size = 0;
uint16_t extrafield_size = 0;
if (filename_size == 0 && zip->file_info.filename != NULL)
filename_size = strlen(zip->file_info.filename);
/* Read extrafield sizes and seek ahead to extrafield */
err = mz_stream_read_uint16(zip->stream, &filename_size);
if (err == MZ_OK)
err = mz_stream_read_uint16(zip->stream, &extrafield_size);
if ((err == MZ_OK) && (extrafield_size > 0)) {
err = mz_stream_seek(zip->stream, filename_size, MZ_SEEK_CUR);
err = mz_stream_seek(zip->stream, 2 + 2 + filename_size, MZ_SEEK_CUR);
if ((err == MZ_OK) && (mz_zip_extrafield_find(zip->stream, MZ_ZIP_EXTENSION_ZIP64, &length) == MZ_OK)) {
if (length >= 8)
err = mz_stream_write_uint64(zip->stream, zip->file_info.compressed_size);
if ((err == MZ_OK) && (length >= 16))
err = mz_stream_write_uint64(zip->stream, zip->file_info.uncompressed_size);
/* Find zip64 extrafield and update compressed and uncompressed sizes */
if (err == MZ_OK)
err = mz_zip_extrafield_find(zip->stream, MZ_ZIP_EXTENSION_ZIP64, &length);
if (err == MZ_OK) {
if (length >= 8)
err = mz_stream_write_uint64(zip->stream, zip->file_info.compressed_size);
if ((err == MZ_OK) && (length >= 16))
err = mz_stream_write_uint64(zip->stream, zip->file_info.uncompressed_size);
}
}
}
mz_stream_set_prop_int64(zip->stream, MZ_STREAM_PROP_DISK_NUMBER, end_disk_number);
mz_stream_seek(zip->stream, end_pos, MZ_SEEK_SET);
}