[PATCH 2/2] hex: drop sha1_to_hex()
- From
Jeff King <peff@peff.net>
- Date
- Nov 11, 2019, 09:04 UTC
- Message-ID
- <20191111090418.GB12545@sigill.intra.peff.net>
- In-Reply-To
- <20191111090332.GA2275@sigill.intra.peff.net>
There's only a single caller left of sha1_to_hex(), since everybody now uses oid_to_hex() instead. This case is in the sha1dc wrapper, where we print a hex sha1 when we find a collision. This one will always be sha1, regardless of the current hash algorithm, so we can't use oid_to_hex() here. In practice we'd probably not be running sha1 at all if it isn't the current algorithm, but it's possible we might still occasionally need to compute a sha1 in a post-sha256 world.
Since sha1_to_hex() is just a wrapper for hash_to_hex_algop(), let's call that ourselves. There's value in getting rid of the sha1-specific wrapper to de-clutter the global namespace, and to make sure nobody uses it (and as with sha1_to_hex_r() in the previous patch, we'll drop the coccinelle transformations, too).
The sha1_to_hex() function is mentioned in a comment; we can easily swap that out for oid_to_hex() to give a better example. It's also mentioned in some test vectors in t4100, but that's not runnable code, so there's no point in trying to clean it up.
Signed-off-by: Jeff King <peff@peff.net> --- cache.h | 3 +-- contrib/coccinelle/object_id.cocci | 15 --------------- hex.c | 5 ----- sha1dc_git.c | 2 +- 4 files changed, 2 insertions(+), 23 deletions(-)
diff --git a/cache.h b/cache.h index 6a4eb221b3..a2ab10503f 100644 --- a/cache.h +++ b/cache.h @@ -1459,12 +1459,11 @@ int hex_to_bytes(unsigned char *binary, const char *hex, size_t len); * The non-`_r` variant returns a static buffer, but uses a ring of 4 * buffers, making it safe to make multiple calls for a single statement, like: * - * printf("%s -> %s", sha1_to_hex(one), sha1_to_hex(two)); + * printf("%s -> %s", oid_to_hex(one), oid_to_hex(two)); */ char *hash_to_hex_algop_r(char *buffer, const unsigned char *hash, const struct git_hash_algo *); char *oid_to_hex_r(char *out, const struct object_id *oid); char *hash_to_hex_algop(const unsigned char *hash, const struct git_hash_algo *); /* static buffer result! */ -char *sha1_to_hex(const unsigned char *sha1); /* same static buffer */ char *hash_to_hex(const unsigned char *hash); /* same static buffer */ char *oid_to_hex(const struct object_id *oid); /* same static buffer */ diff --git a/contrib/coccinelle/object_id.cocci b/contrib/coccinelle/object_id.cocci index 6c0d21d8e2..ddf4f22bd7 100644 --- a/contrib/coccinelle/object_id.cocci +++ b/contrib/coccinelle/object_id.cocci @@ -10,21 +10,6 @@ struct object_id *OIDPTR; - is_null_sha1(OIDPTR->hash) + is_null_oid(OIDPTR) -@@ -struct object_id OID; -@@ -- sha1_to_hex(OID.hash) -+ oid_to_hex(&OID) - -@@ -identifier f != oid_to_hex; -struct object_id *OIDPTR; -@@ - f(...) {<... -- sha1_to_hex(OIDPTR->hash) -+ oid_to_hex(OIDPTR) - ...>} - @@ struct object_id OID; @@ diff --git a/hex.c b/hex.c index 8c3f06a192..fd7f00c43f 100644 --- a/hex.c +++ b/hex.c @@ -103,11 +103,6 @@ char *hash_to_hex_algop(const unsigned char *hash, const struct git_hash_algo *a return hash_to_hex_algop_r(hexbuffer[bufno], hash, algop); } -char *sha1_to_hex(const unsigned char *sha1) -{ - return hash_to_hex_algop(sha1, &hash_algos[GIT_HASH_SHA1]); -} - char *hash_to_hex(const unsigned char *hash) { return hash_to_hex_algop(hash, the_hash_algo); diff --git a/sha1dc_git.c b/sha1dc_git.c index e0cc9d988c..5c300e812e 100644 --- a/sha1dc_git.c +++ b/sha1dc_git.c @@ -19,7 +19,7 @@ void git_SHA1DCFinal(unsigned char hash[20], SHA1_CTX *ctx) if (!SHA1DCFinal(hash, ctx)) return; die("SHA-1 appears to be part of a collision attack: %s", - sha1_to_hex(hash)); + hash_to_hex_algop(hash, &hash_algos[GIT_HASH_SHA1])); } /*
-- 2.24.0.739.gb5632e4929