diff --git a/desCode.h b/desCode.h
index e8ae4bb1dbcda5484fdc8eedbe95bc78465ac2f9..2334628f09dacb3863386ad73ab22df87e4963d0 100644
--- a/desCode.h
+++ b/desCode.h
@@ -1,11 +1,12 @@
-/*
- *	des - fast & portable DES encryption & decryption.
+/* desCode.h
+ *
+ * $Id$ */
+
+/*	des - fast & portable DES encryption & decryption.
  *	Copyright (C) 1992  Dana L. How
- *	Please see the file `README' for the complete copyright notice.
+ *	Please see the file `descore.README' for the complete copyright notice.
  */
 
-
-
 #include "des.h"
 
 #include "RCSID.h"
@@ -344,7 +345,7 @@ extern UINT32 des_keymap[], des_bigmap[];
 						\
 void						\
 NAME(REGISTER BYTE *D,				\
-     REGISTER UINT32 *r,			\
+     REGISTER const UINT32 *r,			\
      REGISTER const UINT8 *s)			\
 {						\
 	register UINT32 x, y, z;		\
@@ -380,7 +381,7 @@ NAME(REGISTER BYTE *D,				\
 						\
 void						\
 NAME(REGISTER BYTE *D,				\
-     REGISTER UINT32 *r,			\
+     REGISTER const UINT32 *r,			\
      REGISTER const UINT8 *s)			\
 {						\
 	register UINT32 x, y, z;		\
diff --git a/desKerb.c b/desKerb.c
index eaf2ec03e3be483e0632b3aa7d847c905627e06c..f66c6dcd3f1b296120cf8901cdc03fe8d3630dce 100644
--- a/desKerb.c
+++ b/desKerb.c
@@ -1,7 +1,7 @@
 /*
  *	des - fast & portable DES encryption & decryption.
  *	Copyright (C) 1992  Dana L. How
- *	Please see the file `README' for the complete copyright notice.
+ *	Please see the file `descore.README' for the complete copyright notice.
  */
 
 #include "des.h"
@@ -16,7 +16,7 @@ DesFunc *DesCryptFuncs[2] = { DesSmallFipsDecrypt, DesSmallFipsEncrypt };
 /* kerberos-compatible key schedule function */
 
 int
-des_key_sched(UINT8 *k, UINT32 *s)
+des_key_sched(const UINT8 *k, UINT32 *s)
 {
 	return DesMethod(s, k);
 }
@@ -24,7 +24,7 @@ des_key_sched(UINT8 *k, UINT32 *s)
 /* kerberos-compatible des coding function */
 
 int
-des_ecb_encrypt(UINT8 *s, UINT8 *d, UINT32 *r, int e)
+des_ecb_encrypt(const UINT8 *s, UINT8 *d, const UINT32 *r, int e)
 {
 	(*DesCryptFuncs[e])(d, r, s);
 	return 0;
diff --git a/desTest.c b/desTest.c
index 31b9ca6f87e977381297072c7b38ca600bb15811..2f8e29cdef2e78e05960c78b0456308b8abf2add 100644
--- a/desTest.c
+++ b/desTest.c
@@ -1,9 +1,12 @@
-/*
- *	des - fast & portable DES encryption & decryption.
- *	Copyright (C) 1992  Dana L. How
- *	Please see the file `README' for the complete copyright notice.
+/* desTest.c
+ *
+ * Exercise the DES routines and collect performance statistics.
  *
- *	Exercise the DES routines and collect performance statistics.
+ * $ID:$ */
+
+/*	des - fast & portable DES encryption & decryption.
+ *	Copyright (C) 1992  Dana L. How
+ *	Please see the file `descore.README' for the complete copyright notice.
  */
 
 #ifndef	lint
@@ -15,15 +18,16 @@ char desTest_cRcs[] = "$Id$";
 
 /* define now(w) to be the elapsed time in hundredths of a second */
 
+#if 1
+/* FIXME: Let autoconf look for getrusage */
+#define now(w) 0;
+#else /* false */
+
 #ifndef __NT__
 #include	<sys/time.h>
 #include	<sys/resource.h>
 #include	<unistd.h>
 
-#if 1
-/* FIXME: Let autoconf look for getrusage */
-#define now(w) 0;
-#else /* false */
 /* extern getrusage(); */
 static struct rusage usage;
 #define	now(w)	(						\
@@ -59,9 +63,7 @@ UINT8 cipher[8], output[8];
 
 /* noisy interfaces to the routines under test */
 
-static void
-method(key)
-UINT8 *key;
+static void method(const UINT8 *key)
 {
 	int j;
 
@@ -74,8 +76,7 @@ UINT8 *key;
 }
 
 static void
-encode(src, dst)
-UINT8 *src, *dst;
+encode(const UINT8 *src, UINT8 *dst)
 {
 	int j;
 
@@ -92,8 +93,7 @@ UINT8 *src, *dst;
 }
 
 static void
-decode(src, dst, check)
-UINT8 *src, *dst, *check;
+decode(const UINT8 *src, UINT8 *dst, const UINT8 *check)
 {
 	int j;
 
@@ -116,9 +116,11 @@ UINT8 *src, *dst, *check;
 /* run the tests */
 
 int
-main(int argc, char **argv)
+main(int argc UNUSED, char **argv UNUSED)
 {
 	int j, m, e, n;
+
+	/* FIXME: Don't use this untyped function pointer. */ 
 	void (*f)();
 	static char * expect[] = {
 		"57 99 F7 2A D2 3F AE 4C", "9C C6 2D F4 3B 6E ED 74",
@@ -126,14 +128,15 @@ main(int argc, char **argv)
 		"43 5C FF C5 68 B3 70 1D", "25 DD AC 3E 96 17 64 67",
 		"80 B5 07 E1 E6 A7 47 3D", "3F A4 0E 8A 98 4D 48 15",
 	};
-	static void (*funcs[])() = {
-		DesQuickCoreEncrypt, DesQuickFipsEncrypt,
-		DesSmallCoreEncrypt, DesSmallFipsEncrypt,
-		DesQuickCoreDecrypt, DesQuickFipsDecrypt,
-		DesSmallCoreDecrypt, DesSmallFipsDecrypt };
+	/* static void (*funcs[])() = { */
+	static DesFunc *funcs[] = {
+	  DesQuickCoreEncrypt, DesQuickFipsEncrypt,
+	  DesSmallCoreEncrypt, DesSmallFipsEncrypt,
+	  DesQuickCoreDecrypt, DesQuickFipsDecrypt,
+	  DesSmallCoreDecrypt, DesSmallFipsDecrypt };
 	static char * names[] = {
-		"QuickCore", "QuickFips",
-		"SmallCore", "SmallFips" };
+	  "QuickCore", "QuickFips",
+	  "SmallCore", "SmallFips" };
 
 	n = 0;
 	DesQuickInit();
diff --git a/desUtil.c b/desUtil.c
index f359dd0e4870d04b377b3a799faf2707372cec4b..abc164183c13c9803f05031590d6595389033a9f 100644
--- a/desUtil.c
+++ b/desUtil.c
@@ -1,7 +1,10 @@
-/*
- *	des - fast & portable DES encryption & decryption.
+/* desUtil.c
+ *
+ * $id:$ */
+
+/*	des - fast & portable DES encryption & decryption.
  *	Copyright (C) 1992  Dana L. How
- *	Please see the file `README' for the complete copyright notice.
+ *	Please see the file `descore.README' for the complete copyright notice.
  */
 
 #include	"desCode.h"
@@ -28,7 +31,7 @@ RCSID2(ego, "\n\nFast DES Library Copyright (c) 1991 Dana L. How\n\n");
 /* set up the method list from the key */
 
 int
-DesMethod(UINT32 *method, UINT8 *k)
+DesMethod(UINT32 *method, const UINT8 *k)
 {
 	register UINT32 n, w;
 	register char * b0, * b1;