use timingsafe_bcmp and get rid of now unused safe.c

6 files changed, 13 insertions, 86 deletions

diff --git a/usr.bin/dig/lib/dns/dst_api.c b/usr.bin/dig/lib/dns/dst_api.c
index be9154041d0..fcce2293afd 100644
--- a/usr.bin/dig/lib/dns/dst_api.c
+++ b/usr.bin/dig/lib/dns/dst_api.c
@@ -33,16 +33,15 @@
 
 /*
  * Principal Author: Brian Wellington
- * $Id: dst_api.c,v 1.14 2020/02/25 17:06:08 deraadt Exp $
+ * $Id: dst_api.c,v 1.15 2020/02/25 18:10:17 florian Exp $
  */
 
 /*! \file */
 #include <stdlib.h>
+#include <string.h>
 
 #include <isc/buffer.h>
 #include <isc/refcount.h>
-#include <isc/safe.h>
-#include <string.h>
 #include <isc/util.h>
 
 #include <dns/keyvalues.h>
diff --git a/usr.bin/dig/lib/dns/hmac_link.c b/usr.bin/dig/lib/dns/hmac_link.c
index 76ef776957a..56c886b9e2f 100644
--- a/usr.bin/dig/lib/dns/hmac_link.c
+++ b/usr.bin/dig/lib/dns/hmac_link.c
@@ -33,7 +33,7 @@
 
 /*
  * Principal Author: Brian Wellington
- * $Id: hmac_link.c,v 1.8 2020/02/25 17:06:08 deraadt Exp $
+ * $Id: hmac_link.c,v 1.9 2020/02/25 18:10:17 florian Exp $
  */
 
 #include <string.h>
@@ -41,7 +41,6 @@
 #include <isc/buffer.h>
 #include <isc/hmacsha.h>
 #include <isc/sha1.h>
-#include <isc/safe.h>
 #include <isc/util.h>
 
 #include <dst/result.h>
diff --git a/usr.bin/dig/lib/isc/Makefile.inc b/usr.bin/dig/lib/isc/Makefile.inc
index f2c78e7ce26..41240e1a80d 100644
--- a/usr.bin/dig/lib/isc/Makefile.inc
+++ b/usr.bin/dig/lib/isc/Makefile.inc
@@ -1,4 +1,4 @@
-#	$OpenBSD: Makefile.inc,v 1.5 2020/02/24 15:09:14 jsg Exp $
+#	$OpenBSD: Makefile.inc,v 1.6 2020/02/25 18:10:17 florian Exp $
 
 .PATH: ${.CURDIR}/lib/isc
 
@@ -6,6 +6,6 @@ SRCS+=	assertions.c base32.c base64.c netaddr.c buffer.c bufferlist.c
 SRCS+=	error.c event.c hash.c heap.c hex.c hmacsha.c
 SRCS+=	lex.c log.c regex.c sockaddr.c
 SRCS+=	task.c result.c parseint.c refcount.c timer.c
-SRCS+=	safe.c serial.c sha1.c sha2.c symtab.c
+SRCS+=	serial.c sha1.c sha2.c symtab.c
 
 
diff --git a/usr.bin/dig/lib/isc/hmacsha.c b/usr.bin/dig/lib/isc/hmacsha.c
index 2548675b7e6..0229c4d2278 100644
--- a/usr.bin/dig/lib/isc/hmacsha.c
+++ b/usr.bin/dig/lib/isc/hmacsha.c
@@ -14,7 +14,7 @@
  * PERFORMANCE OF THIS SOFTWARE.
  */
 
-/* $Id: hmacsha.c,v 1.5 2020/02/25 16:54:24 deraadt Exp $ */
+/* $Id: hmacsha.c,v 1.6 2020/02/25 18:10:17 florian Exp $ */
 
 /*
  * This code implements the HMAC-SHA1, HMAC-SHA224, HMAC-SHA256, HMAC-SHA384
@@ -22,12 +22,11 @@
  * draft-ietf-dnsext-tsig-sha-01.txt.
  */
 
-#include <isc/hmacsha.h>
+#include <string.h>
 
-#include <isc/safe.h>
+#include <isc/hmacsha.h>
 #include <isc/sha1.h>
 #include <isc/sha2.h>
-#include <string.h>
 #include <isc/util.h>
 
 void
@@ -230,7 +229,7 @@ isc_hmacsha1_verify(isc_hmacsha1_t *ctx, unsigned char *digest, size_t len) {
 
 	REQUIRE(len <= ISC_SHA1_DIGESTLENGTH);
 	isc_hmacsha1_sign(ctx, newdigest, ISC_SHA1_DIGESTLENGTH);
-	return (isc_safe_memequal(digest, newdigest, len));
+	return (ISC_TF(timingsafe_bcmp(digest, newdigest, len) == 0));
 }
 
 /*
@@ -243,7 +242,7 @@ isc_hmacsha224_verify(isc_hmacsha224_t *ctx, unsigned char *digest, size_t len)
 
 	REQUIRE(len <= ISC_SHA224_DIGESTLENGTH);
 	isc_hmacsha224_sign(ctx, newdigest, ISC_SHA224_DIGESTLENGTH);
-	return (isc_safe_memequal(digest, newdigest, len));
+	return (ISC_TF(timingsafe_bcmp(digest, newdigest, len) == 0));
 }
 
 /*
@@ -256,7 +255,7 @@ isc_hmacsha256_verify(isc_hmacsha256_t *ctx, unsigned char *digest, size_t len)
 
 	REQUIRE(len <= ISC_SHA256_DIGESTLENGTH);
 	isc_hmacsha256_sign(ctx, newdigest, ISC_SHA256_DIGESTLENGTH);
-	return (isc_safe_memequal(digest, newdigest, len));
+	return (ISC_TF(timingsafe_bcmp(digest, newdigest, len) == 0));
 }
 
 /*
@@ -269,7 +268,7 @@ isc_hmacsha384_verify(isc_hmacsha384_t *ctx, unsigned char *digest, size_t len)
 
 	REQUIRE(len <= ISC_SHA384_DIGESTLENGTH);
 	isc_hmacsha384_sign(ctx, newdigest, ISC_SHA384_DIGESTLENGTH);
-	return (isc_safe_memequal(digest, newdigest, len));
+	return (ISC_TF(timingsafe_bcmp(digest, newdigest, len) == 0));
 }
 
 /*
@@ -282,5 +281,5 @@ isc_hmacsha512_verify(isc_hmacsha512_t *ctx, unsigned char *digest, size_t len)
 
 	REQUIRE(len <= ISC_SHA512_DIGESTLENGTH);
 	isc_hmacsha512_sign(ctx, newdigest, ISC_SHA512_DIGESTLENGTH);
-	return (isc_safe_memequal(digest, newdigest, len));
+	return (ISC_TF(timingsafe_bcmp(digest, newdigest, len) == 0));
 }
diff --git a/usr.bin/dig/lib/isc/include/isc/safe.h b/usr.bin/dig/lib/isc/include/isc/safe.h
deleted file mode 100644
index 516036d22d3..00000000000
--- a/usr.bin/dig/lib/isc/include/isc/safe.h
+++ /dev/null
@@ -1,35 +0,0 @@
-/*
- * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
- *
- * Permission to use, copy, modify, and/or distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
- * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
- * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
- * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
- * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
- * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
- * PERFORMANCE OF THIS SOFTWARE.
- */
-
-/* $Id: safe.h,v 1.4 2020/02/25 16:54:24 deraadt Exp $ */
-
-#ifndef ISC_SAFE_H
-#define ISC_SAFE_H 1
-
-/*! \file isc/safe.h */
-
-#include <isc/types.h>
-#include <stdlib.h>
-
-isc_boolean_t
-isc_safe_memequal(const void *s1, const void *s2, size_t n);
-/*%<
- * Returns ISC_TRUE iff. two blocks of memory are equal, otherwise
- * ISC_FALSE.
- *
- */
-
-#endif /* ISC_SAFE_H */
diff --git a/usr.bin/dig/lib/isc/safe.c b/usr.bin/dig/lib/isc/safe.c
deleted file mode 100644
index 496d1fa496d..00000000000
--- a/usr.bin/dig/lib/isc/safe.c
+++ /dev/null
@@ -1,35 +0,0 @@
-/*
- * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
- *
- * Permission to use, copy, modify, and/or distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
- * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
- * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
- * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
- * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
- * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
- * PERFORMANCE OF THIS SOFTWARE.
- */
-
-/*! \file */
-
-#include <string.h>
-
-#include <isc/safe.h>
-
-isc_boolean_t
-isc_safe_memequal(const void *s1, const void *s2, size_t n) {
-	uint8_t acc = 0;
-
-	if (n != 0U) {
-		const uint8_t *p1 = s1, *p2 = s2;
-
-		do {
-			acc |= *p1++ ^ *p2++;
-		} while (--n != 0U);
-	}
-	return (ISC_TF(acc == 0));
-}