From 0d062ee2bb66b40112877eac38a7390f44c8de0a Mon Sep 17 00:00:00 2001
From: phk <phk@d4fa192b-c00b-0410-8231-f00ffab90ce4>
Date: Mon, 12 Jan 2009 13:09:51 +0000
Subject: [PATCH] Make SHA256 digest standard and use it in hash_classic.c

git-svn-id: svn+ssh://projects.linpro.no/svn/varnish/trunk@3504 d4fa192b-c00b-0410-8231-f00ffab90ce4
---
 varnish-cache/bin/varnishd/cache_hash.c   | 14 ++++----------
 varnish-cache/bin/varnishd/hash_classic.c | 10 ++--------
 varnish-cache/bin/varnishd/hash_critbit.c |  2 --
 varnish-cache/bin/varnishd/heritage.h     |  3 ---
 varnish-cache/bin/varnishd/mgt_param.c    |  4 ----
 5 files changed, 6 insertions(+), 27 deletions(-)

diff --git a/varnish-cache/bin/varnishd/cache_hash.c b/varnish-cache/bin/varnishd/cache_hash.c
index 9f49c465..e8b28b4b 100644
--- a/varnish-cache/bin/varnishd/cache_hash.c
+++ b/varnish-cache/bin/varnishd/cache_hash.c
@@ -214,8 +214,7 @@ HSH_Prepare(struct sess *sp, unsigned nhashcount)
 	if (u)
 		p += sizeof(const char *) - u;
 	sp->hashptr = (void*)p;
-	if (params->hash_sha256)
-		SHA256_Init(sp->wrk->sha256ctx);
+	SHA256_Init(sp->wrk->sha256ctx);
 }
 
 void
@@ -238,10 +237,8 @@ HSH_AddString(struct sess *sp, const char *str)
 	sp->hashptr[sp->ihashptr + 1] = str + l;
 	sp->ihashptr += 2;
 	sp->lhashptr += l + 1;
-	if (params->hash_sha256) {
-		SHA256_Update(sp->wrk->sha256ctx, str, l);
-		SHA256_Update(sp->wrk->sha256ctx, "#", 1);
-	}
+	SHA256_Update(sp->wrk->sha256ctx, str, l);
+	SHA256_Update(sp->wrk->sha256ctx, "#", 1);
 }
 
 struct object *
@@ -260,10 +257,7 @@ HSH_Lookup(struct sess *sp)
 	h = sp->http;
 
 	HSH_Prealloc(sp);
-	if (params->hash_sha256) {
-		SHA256_Final(sp->wrk->nobjhead->digest, sp->wrk->sha256ctx);
-		/* WSP(sp, SLT_Debug, "SHA256: <%.32s>", sha256); */
-	}
+	SHA256_Final(sp->wrk->nobjhead->digest, sp->wrk->sha256ctx);
 	
 	if (sp->objhead != NULL) {
 		CHECK_OBJ_NOTNULL(sp->objhead, OBJHEAD_MAGIC);
diff --git a/varnish-cache/bin/varnishd/hash_classic.c b/varnish-cache/bin/varnishd/hash_classic.c
index f7f109c3..9f2ee04a 100644
--- a/varnish-cache/bin/varnishd/hash_classic.c
+++ b/varnish-cache/bin/varnishd/hash_classic.c
@@ -120,19 +120,13 @@ hcl_lookup(const struct sess *sp, struct objhead *noh)
 	struct objhead *oh;
 	struct hcl_hd *hp;
 	unsigned u1, digest;
-	unsigned u, v;
 	int i;
 
 	CHECK_OBJ_NOTNULL(sp, SESS_MAGIC);
 	CHECK_OBJ_NOTNULL(noh, OBJHEAD_MAGIC);
 
-	digest = ~0U;
-	for (u = 0; u < sp->ihashptr; u += 2) {
-		v = pdiff(sp->hashptr[u], sp->hashptr[u + 1]);
-		digest = crc32(digest, sp->hashptr[u], v);
-	}
-	digest ^= ~0U;
-
+	assert(sizeof noh->digest > sizeof digest);
+	memcpy(&digest, noh->digest, sizeof digest);
 	u1 = digest % hcl_nhash;
 	hp = &hcl_head[u1];
 
diff --git a/varnish-cache/bin/varnishd/hash_critbit.c b/varnish-cache/bin/varnishd/hash_critbit.c
index cce96c90..e37efcca 100644
--- a/varnish-cache/bin/varnishd/hash_critbit.c
+++ b/varnish-cache/bin/varnishd/hash_critbit.c
@@ -367,7 +367,6 @@ hcb_start(void)
 
 	(void)oh;
 	AZ(pthread_create(&tp, NULL, hcb_cleaner, NULL));
-	assert(params->hash_sha256);
 	assert(sizeof(struct hcb_y) <= sizeof(oh->u));
 	memset(&hcb_root, 0, sizeof hcb_root);
 	hcb_build_bittbl();
@@ -402,7 +401,6 @@ hcb_lookup(const struct sess *sp, struct objhead *noh)
 	struct objhead *oh;
 	unsigned u;
 	
-	assert(params->hash_sha256);
 	oh =  hcb_insert(&hcb_root, noh, 0);
 	if (oh != NULL) {
 		/* Assert that we didn't muck with the tree without lock */
diff --git a/varnish-cache/bin/varnishd/heritage.h b/varnish-cache/bin/varnishd/heritage.h
index 7a7c2193..8be6f7af 100644
--- a/varnish-cache/bin/varnishd/heritage.h
+++ b/varnish-cache/bin/varnishd/heritage.h
@@ -174,9 +174,6 @@ struct params {
 	/* Default grace period */
 	unsigned		default_grace;
 
-	/* Use sha256 hasing */
-	unsigned		hash_sha256;
-
 	/* Log hash string to shm */
 	unsigned		log_hash;
 
diff --git a/varnish-cache/bin/varnishd/mgt_param.c b/varnish-cache/bin/varnishd/mgt_param.c
index 6b6bc41f..56c434da 100644
--- a/varnish-cache/bin/varnishd/mgt_param.c
+++ b/varnish-cache/bin/varnishd/mgt_param.c
@@ -710,10 +710,6 @@ static const struct parspec input_parspec[] = {
 		"NB: Must be specified with -p to have effect.\n",
 		0,
 		"8192", "bytes" },
-	{ "hash_sha256", tweak_bool, &master.hash_sha256, 0, 0,
-		"Use SHA256 compression of hash-strings",
-		0,
-		"on", "bool" },
 	{ "log_hashstring", tweak_bool, &master.log_hash, 0, 0,
 		"Log the hash string to shared memory log.\n",
 		0,
-- 
2.39.5