sha1-file: add a constant for hash block size
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@crustytoothpaste.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
brian m. carlson committed
Nov 14, 2018 at 04:09 UTC
a2ce0a752600a44979da94b19aa1b367c6850bd7
3 files changed
+9
cache.h
+4
@@ -45,10 +45,14 @@ unsigned long git_deflate_bound(git_zstream *, unsigned long);
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/* The length in bytes and in hex digits of an object name (SHA-1 value). */
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#define GIT_SHA1_RAWSZ 20
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#define GIT_SHA1_HEXSZ (2 * GIT_SHA1_RAWSZ)
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+/* The block size of SHA-1. */
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+#define GIT_SHA1_BLKSZ 64
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/* The length in byte and in hex digits of the largest possible hash value. */
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#define GIT_MAX_RAWSZ GIT_SHA1_RAWSZ
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#define GIT_MAX_HEXSZ GIT_SHA1_HEXSZ
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+/* The largest possible block size for any supported hash. */
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+#define GIT_MAX_BLKSZ GIT_SHA1_BLKSZ
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struct object_id {
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unsigned char hash[GIT_MAX_RAWSZ];
hash.h
+3
@@ -81,6 +81,9 @@ struct git_hash_algo {
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/* The length of the hash in hex characters. */
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size_t hexsz;
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+ /* The block size of the hash. */
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+ size_t blksz;
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+
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/* The hash initialization function. */
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git_hash_init_fn init_fn;
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sha1-file.c
+2
@@ -90,6 +90,7 @@ const struct git_hash_algo hash_algos[GIT_HASH_NALGOS] = {
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0x00000000,
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0,
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0,
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+ 0,
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git_hash_unknown_init,
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git_hash_unknown_update,
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git_hash_unknown_final,
@@ -102,6 +103,7 @@ const struct git_hash_algo hash_algos[GIT_HASH_NALGOS] = {
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0x73686131,
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GIT_SHA1_RAWSZ,
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GIT_SHA1_HEXSZ,
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+ GIT_SHA1_BLKSZ,
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git_hash_sha1_init,
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git_hash_sha1_update,
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git_hash_sha1_final,