From f9221e2cf5049805d9151b3db6a5eef07b1cc92e Mon Sep 17 00:00:00 2001 From: Taylor Blau Date: Wed, 23 Jun 2021 14:39:07 -0400 Subject: csum-file: introduce checksum_valid() Introduce a new function which checks the validity of a file's trailing checksum. This is similar to hashfd_check(), but different since it is intended to be used by callers who aren't writing the same data (like `git index-pack --verify`), but who instead want to validate the integrity of data that they are reading. Rewrite the first of two callers which could benefit from this new function in pack-check.c. Subsequent callers will be added in the following patches. Helped-by: Jeff King Signed-off-by: Jeff King Signed-off-by: Taylor Blau Signed-off-by: Junio C Hamano --- pack-check.c | 11 +---------- 1 file changed, 1 insertion(+), 10 deletions(-) (limited to 'pack-check.c') diff --git a/pack-check.c b/pack-check.c index 4b089fe8ec..c8e560d71a 100644 --- a/pack-check.c +++ b/pack-check.c @@ -164,22 +164,13 @@ static int verify_packfile(struct repository *r, int verify_pack_index(struct packed_git *p) { - size_t len; - const unsigned char *index_base; - git_hash_ctx ctx; - unsigned char hash[GIT_MAX_RAWSZ]; int err = 0; if (open_pack_index(p)) return error("packfile %s index not opened", p->pack_name); - index_base = p->index_data; - len = p->index_size - the_hash_algo->rawsz; /* Verify SHA1 sum of the index file */ - the_hash_algo->init_fn(&ctx); - the_hash_algo->update_fn(&ctx, index_base, len); - the_hash_algo->final_fn(hash, &ctx); - if (!hasheq(hash, index_base + len)) + if (!hashfile_checksum_valid(p->index_data, p->index_size)) err = error("Packfile index for %s hash mismatch", p->pack_name); return err; -- cgit v1.2.3