Make the second arg to the sudo auth verify function const.

This may be either a plaintext password or a password prompt.
Either way it should not be modified by the verify function.

plugins/sudoers/auth/secureware.c

@@ -71,7 +71,7 @@ sudo_secureware_init(struct passwd *pw, sudo_auth *auth)
 }
 
 int
-sudo_secureware_verify(struct passwd *pw, char *pass, sudo_auth *auth, struct sudo_conv_callback *callback)
+sudo_secureware_verify(struct passwd *pw, const char *pass, sudo_auth *auth, struct sudo_conv_callback *callback)
 {
     char *pw_epasswd = auth->data;
     char *epass = NULL;