PEM_def_callback(), EVP_read_pw_string() and EVP_read_pw_string_min())
all use the default B<UI_METHOD>.
+=head1 RETURN VALUES
+
+UI_UTIL_read_pw_string() and UI_UTIL_read_pw() return 0 on success or a negative
+value on error.
+
+UI_UTIL_wrap_read_pem_callback() returns a valid B<UI_METHOD> structure or NULL
+if an error occurred.
+
=head1 SEE ALSO
L<UI_get_default_method(3)>
=head1 COPYRIGHT
-Copyright 2001-2016 The OpenSSL Project Authors. All Rights Reserved.
+Copyright 2001-2018 The OpenSSL Project Authors. All Rights Reserved.
Licensed under the OpenSSL license (the "License"). You may not use
this file except in compliance with the License. You can obtain a copy