Use hash transform function return type for passing burn stack depth

* cipher/gostr4311-94.c (transform): Return stack burn depth.
* cipher/hash-common.c (_gcry_md_block_write): Use stack burn depth
returned by 'hd->bwrite'.
* cipher/hash-common.h (_gcry_md_block_write_t): Change return type to
'unsigned int'.
(gry_md_block_ctx_t): Remove 'stack_burn'.
* cipher/md4.c (transform): Return stack burn depth.
(md4_final): Use stack burn depth from transform.
* cipher/md5.c (transform): Return stack burn depth.
(md5_final): Use stack burn depth from transform.
* cipher/rmd160.c (transform): Return stack burn depth.
(rmd160_final): Use stack burn depth from transform.
* cipher/sha1.c (transform): Return stack burn depth.
(sha1_final): Use stack burn depth from transform.
* cipher/sha256.c (transform): Return stack burn depth.
(sha256_final): Use stack burn depth from transform.
* cipher/sha512.c (__transform, transform): Return stack burn depth.
(sha512_final): Use stack burn depth from transform.
* cipher/stribog.c (transform64): Return stack burn depth.
* cipher/tiger.c (transform): Return stack burn depth.
(tiger_final): Use stack burn depth from transform.
--

Transform function might want different depth of stack burn depending on
detected CPU features (like in SHA-512 on ARM with NEON). So return
stack burn depth from transform functions as a request or a hint to
calling function.

Signed-off-by: Jussi Kivilinna <jussi.kivilinna@iki.fi>

1 files changed, 4 insertions, 3 deletions

diff --git a/cipher/stribog.c b/cipher/stribog.c
index 234a17e8..1f798823 100644
--- a/cipher/stribog.c
+++ b/cipher/stribog.c
@@ -1274,7 +1274,7 @@ static void g (u64 *h, u64 *m, u64 *N)
 }
 
 
-static void
+static unsigned int
 transform64 (void *context, const unsigned char *inbuf_arg);
 
 
@@ -1287,7 +1287,6 @@ stribog_init_512 (void *context)
 
   hd->bctx.blocksize = 64;
   hd->bctx.bwrite = transform64;
-  hd->bctx.stack_burn = 768;
 }
 
 static void
@@ -1346,12 +1345,14 @@ transform (STRIBOG_CONTEXT *hd, const unsigned char *data, unsigned count)
       hd->Sigma[i] += M[i];
 }
 
-static void
+static unsigned int
 transform64 (void *context, const unsigned char *inbuf_arg)
 {
   STRIBOG_CONTEXT *hd = context;
 
   transform (hd, inbuf_arg, 64 * 8);
+
+  return /* burn_stack */ 768;
 }
 
 /*