diff options
Diffstat (limited to 'Utilities/cmlibarchive/libarchive/archive_read_support_format_zip.c')
| -rw-r--r-- | Utilities/cmlibarchive/libarchive/archive_read_support_format_zip.c | 71 |
1 files changed, 51 insertions, 20 deletions
diff --git a/Utilities/cmlibarchive/libarchive/archive_read_support_format_zip.c b/Utilities/cmlibarchive/libarchive/archive_read_support_format_zip.c index e56bd63ac..7e99b1275 100644 --- a/Utilities/cmlibarchive/libarchive/archive_read_support_format_zip.c +++ b/Utilities/cmlibarchive/libarchive/archive_read_support_format_zip.c @@ -347,7 +347,7 @@ fake_crc32(unsigned long crc, const void *buff, size_t len) return 0; } -static struct { +static const struct { int id; const char * name; } compression_methods[] = { @@ -511,7 +511,13 @@ process_extra(struct archive_read *a, const char *p, size_t extra_length, struct case 0x5455: { /* Extended time field "UT". */ - int flags = p[offset]; + int flags; + if (datasize == 0) { + archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT, + "Incomplete extended time field"); + return ARCHIVE_FAILED; + } + flags = p[offset]; offset++; datasize--; /* Flag bits indicate which dates are present. */ @@ -723,6 +729,11 @@ process_extra(struct archive_read *a, const char *p, size_t extra_length, struct } case 0x9901: /* WinZip AES extra data field. */ + if (datasize < 6) { + archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT, + "Incomplete AES field"); + return ARCHIVE_FAILED; + } if (p[offset + 2] == 'A' && p[offset + 3] == 'E') { /* Vendor version. */ zip_entry->aes_extra.vendor = @@ -881,6 +892,24 @@ zip_read_local_file_header(struct archive_read *a, struct archive_entry *entry, zip_entry->mode |= 0664; } + /* Windows archivers sometimes use backslash as the directory separator. + Normalize to slash. */ + if (zip_entry->system == 0 && + (wp = archive_entry_pathname_w(entry)) != NULL) { + if (wcschr(wp, L'/') == NULL && wcschr(wp, L'\\') != NULL) { + size_t i; + struct archive_wstring s; + archive_string_init(&s); + archive_wstrcpy(&s, wp); + for (i = 0; i < archive_strlen(&s); i++) { + if (s.s[i] == '\\') + s.s[i] = '/'; + } + archive_entry_copy_pathname_w(entry, s.s); + archive_wstring_free(&s); + } + } + /* Make sure that entries with a trailing '/' are marked as directories * even if the External File Attributes contains bogus values. If this * is not a directory and there is no type, assume regularfile. */ @@ -1056,6 +1085,7 @@ zip_read_local_file_header(struct archive_read *a, struct archive_entry *entry, zip->end_of_entry = 1; /* Set up a more descriptive format name. */ + archive_string_empty(&zip->format_name); archive_string_sprintf(&zip->format_name, "ZIP %d.%d (%s)", version / 10, version % 10, compression_name(zip->entry->compression)); @@ -2407,7 +2437,7 @@ read_eocd(struct zip *zip, const char *p, int64_t current_offset) * Examine Zip64 EOCD locator: If it's valid, store the information * from it. */ -static void +static int read_zip64_eocd(struct archive_read *a, struct zip *zip, const char *p) { int64_t eocd64_offset; @@ -2417,35 +2447,37 @@ read_zip64_eocd(struct archive_read *a, struct zip *zip, const char *p) /* Central dir must be on first volume. */ if (archive_le32dec(p + 4) != 0) - return; + return 0; /* Must be only a single volume. */ if (archive_le32dec(p + 16) != 1) - return; + return 0; /* Find the Zip64 EOCD record. */ eocd64_offset = archive_le64dec(p + 8); if (__archive_read_seek(a, eocd64_offset, SEEK_SET) < 0) - return; + return 0; if ((p = __archive_read_ahead(a, 56, NULL)) == NULL) - return; + return 0; /* Make sure we can read all of it. */ eocd64_size = archive_le64dec(p + 4) + 12; if (eocd64_size < 56 || eocd64_size > 16384) - return; + return 0; if ((p = __archive_read_ahead(a, (size_t)eocd64_size, NULL)) == NULL) - return; + return 0; /* Sanity-check the EOCD64 */ if (archive_le32dec(p + 16) != 0) /* Must be disk #0 */ - return; + return 0; if (archive_le32dec(p + 20) != 0) /* CD must be on disk #0 */ - return; + return 0; /* CD can't be split. */ if (archive_le64dec(p + 24) != archive_le64dec(p + 32)) - return; + return 0; /* Save the central directory offset for later use. */ zip->central_directory_offset = archive_le64dec(p + 48); + + return 32; } static int @@ -2483,15 +2515,14 @@ archive_read_format_zip_seekable_bid(struct archive_read *a, int best_bid) if (memcmp(p + i, "PK\005\006", 4) == 0) { int ret = read_eocd(zip, p + i, current_offset + i); - if (ret > 0) { - /* Zip64 EOCD locator precedes - * regular EOCD if present. */ - if (i >= 20 - && memcmp(p + i - 20, "PK\006\007", 4) == 0) { - read_zip64_eocd(a, zip, p + i - 20); - } - return (ret); + /* Zip64 EOCD locator precedes + * regular EOCD if present. */ + if (i >= 20 && memcmp(p + i - 20, "PK\006\007", 4) == 0) { + int ret_zip64 = read_zip64_eocd(a, zip, p + i - 20); + if (ret_zip64 > ret) + ret = ret_zip64; } + return (ret); } i -= 4; break; |