krb5int_c_padding_length
unsigned int krb5int_c_padding_length(const struct krb5_keytypes *ktp,
pad_length = krb5int_c_padding_length(ktp, data_length);
*pad_length = krb5int_c_padding_length(ktp, data_length);
padding_len = krb5int_c_padding_length(ktp, input->length);
padding_len = krb5int_c_padding_length(ktp, inputlen);