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Diffstat (limited to 'archive-zip.c')
-rw-r--r--archive-zip.c24
1 files changed, 18 insertions, 6 deletions
diff --git a/archive-zip.c b/archive-zip.c
index ae5572a..36e922a 100644
--- a/archive-zip.c
+++ b/archive-zip.c
@@ -35,6 +35,7 @@ struct zip_local_header {
unsigned char size[4];
unsigned char filename_length[2];
unsigned char extra_length[2];
+ unsigned char _end[1];
};
struct zip_dir_header {
@@ -55,6 +56,7 @@ struct zip_dir_header {
unsigned char attr1[2];
unsigned char attr2[4];
unsigned char offset[4];
+ unsigned char _end[1];
};
struct zip_dir_trailer {
@@ -66,8 +68,18 @@ struct zip_dir_trailer {
unsigned char size[4];
unsigned char offset[4];
unsigned char comment_length[2];
+ unsigned char _end[1];
};
+/*
+ * On ARM, padding is added at the end of the struct, so a simple
+ * sizeof(struct ...) reports two bytes more than the payload size
+ * we're interested in.
+ */
+#define ZIP_LOCAL_HEADER_SIZE offsetof(struct zip_local_header, _end)
+#define ZIP_DIR_HEADER_SIZE offsetof(struct zip_dir_header, _end)
+#define ZIP_DIR_TRAILER_SIZE offsetof(struct zip_dir_trailer, _end)
+
static void copy_le16(unsigned char *dest, unsigned int n)
{
dest[0] = 0xff & n;
@@ -211,7 +223,7 @@ static int write_zip_entry(const unsigned char *sha1,
}
/* make sure we have enough free space in the dictionary */
- direntsize = sizeof(struct zip_dir_header) + pathlen;
+ direntsize = ZIP_DIR_HEADER_SIZE + pathlen;
while (zip_dir_size < zip_dir_offset + direntsize) {
zip_dir_size += ZIP_DIRECTORY_MIN_SIZE;
zip_dir = xrealloc(zip_dir, zip_dir_size);
@@ -234,8 +246,8 @@ static int write_zip_entry(const unsigned char *sha1,
copy_le16(dirent.attr1, 0);
copy_le32(dirent.attr2, attr2);
copy_le32(dirent.offset, zip_offset);
- memcpy(zip_dir + zip_dir_offset, &dirent, sizeof(struct zip_dir_header));
- zip_dir_offset += sizeof(struct zip_dir_header);
+ 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;
zip_dir_entries++;
@@ -251,8 +263,8 @@ static int write_zip_entry(const unsigned char *sha1,
copy_le32(header.size, uncompressed_size);
copy_le16(header.filename_length, pathlen);
copy_le16(header.extra_length, 0);
- write_or_die(1, &header, sizeof(struct zip_local_header));
- zip_offset += sizeof(struct zip_local_header);
+ write_or_die(1, &header, ZIP_LOCAL_HEADER_SIZE);
+ zip_offset += ZIP_LOCAL_HEADER_SIZE;
write_or_die(1, path, pathlen);
zip_offset += pathlen;
if (compressed_size > 0) {
@@ -282,7 +294,7 @@ static void write_zip_trailer(const unsigned char *sha1)
copy_le16(trailer.comment_length, sha1 ? 40 : 0);
write_or_die(1, zip_dir, zip_dir_offset);
- write_or_die(1, &trailer, sizeof(struct zip_dir_trailer));
+ write_or_die(1, &trailer, ZIP_DIR_TRAILER_SIZE);
if (sha1)
write_or_die(1, sha1_to_hex(sha1), 40);
}