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| author | Nicolas Pitre <nico@cam.org> | 2007-03-20 21:07:48 (GMT) |
|---|---|---|
| committer | Junio C Hamano <junkio@cox.net> | 2007-03-21 05:09:59 (GMT) |
| commit | 9096c660a85c4a3d30f8885c766c34ce0766e869 (patch) | |
| tree | 6e4f7b7b59ddd13684b044754278211a9f62e2e1 | |
| parent | ce9fbf16e0000ecca92870a90e4b30afcb3917b7 (diff) | |
| download | git-9096c660a85c4a3d30f8885c766c34ce0766e869.zip git-9096c660a85c4a3d30f8885c766c34ce0766e869.tar.gz git-9096c660a85c4a3d30f8885c766c34ce0766e869.tar.bz2 | |
index-pack: more validation checks and cleanups
When appending objects to a pack, make sure the appended data is really
what we expect instead of simply loading potentially corrupted objects
and legitimating them by computing a SHA1 of that corrupt data.
With this the sha1_object() can lose its test_for_collision parameter
which is now redundent.
Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>
| -rw-r--r-- | index-pack.c | 18 |
1 files changed, 9 insertions, 9 deletions
diff --git a/index-pack.c b/index-pack.c index f314937..61eb20e 100644 --- a/index-pack.c +++ b/index-pack.c @@ -345,12 +345,10 @@ static int find_delta_children(const union delta_base *base, } static void sha1_object(const void *data, unsigned long size, - enum object_type type, unsigned char *sha1, - int test_for_collision) + enum object_type type, unsigned char *sha1) { hash_sha1_file(data, size, typename(type), sha1); - - if (test_for_collision && has_sha1_file(sha1)) { + if (has_sha1_file(sha1)) { void *has_data; enum object_type has_type; unsigned long has_size; @@ -381,7 +379,7 @@ static void resolve_delta(struct object_entry *delta_obj, void *base_data, free(delta_data); if (!result) bad_object(delta_obj->offset, "failed to apply delta"); - sha1_object(result, result_size, type, delta_obj->sha1, 1); + sha1_object(result, result_size, type, delta_obj->sha1); nr_resolved_deltas++; hashcpy(delta_base.sha1, delta_obj->sha1); @@ -438,7 +436,7 @@ static void parse_pack_objects(unsigned char *sha1) delta->obj_no = i; delta++; } else - sha1_object(data, obj->size, obj->type, obj->sha1, 1); + sha1_object(data, obj->size, obj->type, obj->sha1); free(data); if (verbose) percent = display_progress(i+1, nr_objects, percent); @@ -541,7 +539,7 @@ static int write_compressed(int fd, void *in, unsigned int size) return size; } -static void append_obj_to_pack(void *buf, +static void append_obj_to_pack(const unsigned char *sha1, void *buf, unsigned long size, enum object_type type) { struct object_entry *obj = &objects[nr_objects++]; @@ -559,7 +557,7 @@ static void append_obj_to_pack(void *buf, write_or_die(output_fd, header, n); obj[1].offset = obj[0].offset + n; obj[1].offset += write_compressed(output_fd, buf, size); - sha1_object(buf, size, type, obj->sha1, 0); + hashcpy(obj->sha1, sha1); } static int delta_pos_compare(const void *_a, const void *_b) @@ -612,7 +610,9 @@ static void fix_unresolved_deltas(int nr_unresolved) resolve_delta(child, data, size, type); } - append_obj_to_pack(data, size, type); + if (check_sha1_signature(d->base.sha1, data, size, typename(type))) + die("local object %s is corrupt", sha1_to_hex(d->base.sha1)); + append_obj_to_pack(d->base.sha1, data, size, type); free(data); if (verbose) percent = display_progress(nr_resolved_deltas, |