From: Andy Polyakov <appro@openssl.org>
Date: Wed, 20 Jun 2007 17:36:39 +0000 (+0000)
Subject: Optimize OPENSSL_cleanse.
X-Git-Tag: OpenSSL_0_9_8k^2~789
X-Git-Url: https://git.openssl.org/?p=openssl.git;a=commitdiff_plain;h=c943ca5404a9297cbe57aecb538b17fb06d98969

Optimize OPENSSL_cleanse.
---

diff --git a/crypto/mem_clr.c b/crypto/mem_clr.c
index 75cbfb374e..00dfcff0cf 100644
--- a/crypto/mem_clr.c
+++ b/crypto/mem_clr.c
@@ -64,12 +64,13 @@ unsigned char cleanse_ctr = 0;
 void OPENSSL_cleanse(void *ptr, size_t len)
 	{
 	unsigned char *p = ptr;
-	size_t loop = len;
+	size_t loop = len, ctr = cleanse_ctr;
 	while(loop--)
 		{
-		*(p++) = cleanse_ctr;
-		cleanse_ctr += (17 + (unsigned char)((unsigned long)p & 0xF));
+		*(p++) = (unsigned char)ctr;
+		ctr += (17 + ((size_t)p & 0xF));
 		}
-	if(memchr(ptr, cleanse_ctr, len))
-		cleanse_ctr += 63;
+	if(p=memchr(ptr, (unsigned char)ctr, len))
+		ctr += (63 + (size_t)p);
+	cleanse_ctr = (unsigned char)ctr;
 	}