There is one place we need the hash algorithm block size: the HMAC code
for push certs. Expose this constant in struct git_hash_algo and expose
values for SHA-1 and for the largest value of any hash.
Signed-off-by: brian m. carlson <sandals@xxxxxxxxxxxxxxxxxxxx>
---
cache.h | 4 ++++
hash.h | 3 +++
sha1-file.c | 2 ++
3 files changed, 9 insertions(+)
diff --git a/cache.h b/cache.h
index bab8e8964f..9e5d1dd85a 100644
--- a/cache.h
+++ b/cache.h
@@ -45,10 +45,14 @@ unsigned long git_deflate_bound(git_zstream *, unsigned long);
/* The length in bytes and in hex digits of an object name (SHA-1 value). */
#define GIT_SHA1_RAWSZ 20
#define GIT_SHA1_HEXSZ (2 * GIT_SHA1_RAWSZ)
+/* The block size of SHA-1. */
+#define GIT_SHA1_BLKSZ 64
/* The length in byte and in hex digits of the largest possible hash value. */
#define GIT_MAX_RAWSZ GIT_SHA1_RAWSZ
#define GIT_MAX_HEXSZ GIT_SHA1_HEXSZ
+/* The largest possible block size for any supported hash. */
+#define GIT_MAX_BLKSZ GIT_SHA1_BLKSZ
struct object_id {
unsigned char hash[GIT_MAX_RAWSZ];
diff --git a/hash.h b/hash.h
index 80881eea47..1bcf7ab6fd 100644
--- a/hash.h
+++ b/hash.h
@@ -81,6 +81,9 @@ struct git_hash_algo {
/* The length of the hash in hex characters. */
size_t hexsz;
+ /* The block size of the hash. */
+ size_t blksz;
+
/* The hash initialization function. */
git_hash_init_fn init_fn;
diff --git a/sha1-file.c b/sha1-file.c
index 7e9dedc744..9bdd04ea45 100644
--- a/sha1-file.c
+++ b/sha1-file.c
@@ -90,6 +90,7 @@ const struct git_hash_algo hash_algos[GIT_HASH_NALGOS] = {
0x00000000,
0,
0,
+ 0,
git_hash_unknown_init,
git_hash_unknown_update,
git_hash_unknown_final,
@@ -102,6 +103,7 @@ const struct git_hash_algo hash_algos[GIT_HASH_NALGOS] = {
0x73686131,
GIT_SHA1_RAWSZ,
GIT_SHA1_HEXSZ,
+ GIT_SHA1_BLKSZ,
git_hash_sha1_init,
git_hash_sha1_update,
git_hash_sha1_final,
