diff options
Diffstat (limited to 'libarchive/archive_read_support_format_7zip.c')
| -rw-r--r-- | libarchive/archive_read_support_format_7zip.c | 83 |
1 files changed, 80 insertions, 3 deletions
diff --git a/libarchive/archive_read_support_format_7zip.c b/libarchive/archive_read_support_format_7zip.c index b171bea01a2f..92495e628f9a 100644 --- a/libarchive/archive_read_support_format_7zip.c +++ b/libarchive/archive_read_support_format_7zip.c @@ -24,7 +24,6 @@ */ #include "archive_platform.h" -__FBSDID("$FreeBSD$"); #ifdef HAVE_ERRNO_H #include <errno.h> @@ -116,6 +115,30 @@ __FBSDID("$FreeBSD$"); #define kEncodedHeader 0x17 #define kDummy 0x19 +// Check that some windows file attribute constants are defined. +// Reference: https://learn.microsoft.com/en-us/windows/win32/fileio/file-attribute-constants +#ifndef FILE_ATTRIBUTE_READONLY +#define FILE_ATTRIBUTE_READONLY 0x00000001 +#endif + +#ifndef FILE_ATTRIBUTE_HIDDEN +#define FILE_ATTRIBUTE_HIDDEN 0x00000002 +#endif + +#ifndef FILE_ATTRIBUTE_SYSTEM +#define FILE_ATTRIBUTE_SYSTEM 0x00000004 +#endif + +#ifndef FILE_ATTRIBUTE_DIRECTORY +#define FILE_ATTRIBUTE_DIRECTORY 0x00000010 +#endif + +// This value is defined in 7zip with the comment "trick for Unix". +// +// 7z archives created on unix have this bit set in the high 16 bits of +// the attr field along with the unix permissions. +#define FILE_ATTRIBUTE_UNIX_EXTENSION 0x8000 + struct _7z_digests { unsigned char *defineds; uint32_t *digests; @@ -739,6 +762,37 @@ archive_read_format_7zip_read_header(struct archive_read *a, archive_entry_set_size(entry, 0); } + // These attributes are supported by the windows implementation of archive_write_disk. + const int supported_attrs = FILE_ATTRIBUTE_READONLY | FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM; + + if (zip_entry->attr & supported_attrs) { + char *fflags_text, *ptr; + /* allocate for "rdonly,hidden,system," */ + fflags_text = malloc(22 * sizeof(char)); + if (fflags_text != NULL) { + ptr = fflags_text; + if (zip_entry->attr & FILE_ATTRIBUTE_READONLY) { + strcpy(ptr, "rdonly,"); + ptr = ptr + 7; + } + if (zip_entry->attr & FILE_ATTRIBUTE_HIDDEN) { + strcpy(ptr, "hidden,"); + ptr = ptr + 7; + } + if (zip_entry->attr & FILE_ATTRIBUTE_SYSTEM) { + strcpy(ptr, "system,"); + ptr = ptr + 7; + } + if (ptr > fflags_text) { + /* Delete trailing comma */ + *(ptr - 1) = '\0'; + archive_entry_copy_fflags_text(entry, + fflags_text); + } + free(fflags_text); + } + } + /* If there's no body, force read_data() to return EOF immediately. */ if (zip->entry_bytes_remaining < 1) zip->end_of_entry = 1; @@ -1333,6 +1387,7 @@ init_decompression(struct archive_read *a, struct _7zip *zip, case _7Z_IA64: case _7Z_ARM: case _7Z_ARMTHUMB: + case _7Z_ARM64: case _7Z_SPARC: case _7Z_DELTA: archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, @@ -2666,6 +2721,28 @@ read_Header(struct archive_read *a, struct _7z_header_info *h, entries[i].flg |= HAS_STREAM; /* The high 16 bits of attributes is a posix file mode. */ entries[i].mode = entries[i].attr >> 16; + + if (!(entries[i].attr & FILE_ATTRIBUTE_UNIX_EXTENSION)) { + // Only windows permissions specified for this entry. Translate to + // reasonable corresponding unix permissions. + + if (entries[i].attr & FILE_ATTRIBUTE_DIRECTORY) { + if (entries[i].attr & FILE_ATTRIBUTE_READONLY) { + // Read-only directory. + entries[i].mode = AE_IFDIR | 0555; + } else { + // Read-write directory. + entries[i].mode = AE_IFDIR | 0755; + } + } else if (entries[i].attr & FILE_ATTRIBUTE_READONLY) { + // Readonly file. + entries[i].mode = AE_IFREG | 0444; + } else { + // Assume read-write file. + entries[i].mode = AE_IFREG | 0644; + } + } + if (entries[i].flg & HAS_STREAM) { if ((size_t)sindex >= si->ss.unpack_streams) return (-1); @@ -2706,7 +2783,7 @@ read_Header(struct archive_read *a, struct _7z_header_info *h, } entries[i].ssIndex = -1; } - if (entries[i].attr & 0x01) + if (entries[i].attr & FILE_ATTRIBUTE_READONLY) entries[i].mode &= ~0222;/* Read only. */ if ((entries[i].flg & HAS_STREAM) == 0 && indexInFolder == 0) { @@ -2973,8 +3050,8 @@ slurp_central_directory(struct archive_read *a, struct _7zip *zip, /* Check the EncodedHeader CRC.*/ if (r == 0 && zip->header_crc32 != next_header_crc) { - archive_set_error(&a->archive, -1, #ifndef DONT_FAIL_ON_CRC_ERROR + archive_set_error(&a->archive, -1, "Damaged 7-Zip archive"); r = -1; #endif |