* libmisc/obscure.c, libmisc/salt.c, src/passwd.c: Match DES, MD5,

SHA256, and SHA512 exactly (not only the first 3/6 chars).
* libmisc/salt.c (SHA_salt_rounds): Set rounds to the specified
  prefered_rounds value, if specified.
* src/gpasswd.c, libmisc/salt.c: Fix compilation warnings (use
  size_t for lengths).
* src/chpasswd.c, src/chgpasswd.c: Add missing parenthesis.

src/chgpasswd.c

@@ -185,7 +185,7 @@ int main (int argc, char **argv)
 		usage ();
 	}
 	if ((eflg && (md5flg || cflg)) ||
-	    md5flg && cflg) {
+	    (md5flg && cflg)) {
 		fprintf (stderr,
 			 _("%s: the -c, -e, and -m flags are exclusive\n"),
 			 Prog);

src/chpasswd.c

@@ -179,7 +179,7 @@ int main (int argc, char **argv)
 		usage ();
 	}
 	if ((eflg && (md5flg || cflg)) ||
-	    md5flg && cflg) {
+	    (md5flg && cflg)) {
 		fprintf (stderr,
 			 _("%s: the -c, -e, and -m flags are exclusive\n"),
 			 Prog);

src/gpasswd.c

@@ -121,7 +121,7 @@ static int check_list (const char *users)
 	const char *start, *end;
 	char username[32];
 	int errors = 0;
-	int len;
+	size_t len;
 
 	for (start = users; start && *start; start = end) {
 		if ((end = strchr (start, ','))) {

src/passwd.c

@@ -251,9 +251,9 @@ static int new_password (const struct passwd *pw)
 			pass_max_len = getdef_num ("PASS_MAX_LEN", 8);
 #ifdef ENCRYPTMETHOD_SELECT
 	} else {
-		if (!strncmp (method, "MD5"   , 3) ||
-		    !strncmp (method, "SHA256", 6) ||
-		    !strncmp (method, "SHA512", 6))
+		if (!strcmp (method, "MD5") ||
+		    !strcmp (method, "SHA256") ||
+		    !strcmp (method, "SHA512"))
 			pass_max_len = -1;
 		else
 			pass_max_len = getdef_num ("PASS_MAX_LEN", 8);