diff options
Diffstat (limited to 'libarchive/archive_read_support_format_zip.c')
| -rw-r--r-- | libarchive/archive_read_support_format_zip.c | 37 |
1 files changed, 19 insertions, 18 deletions
diff --git a/libarchive/archive_read_support_format_zip.c b/libarchive/archive_read_support_format_zip.c index 08bcf1f537cc..e62f99c8b9e8 100644 --- a/libarchive/archive_read_support_format_zip.c +++ b/libarchive/archive_read_support_format_zip.c @@ -2407,7 +2407,7 @@ 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 +2417,37 @@ 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 +2485,14 @@ 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; |