feat: updates

src/cmd_hmac_encrypt.rs

@@ -2,7 +2,7 @@ use clap::{App, Arg, ArgMatches, SubCommand};
 use rust_util::util_clap::{Command, CommandError};
 use std::collections::BTreeMap;
 
-use crate::{cmdutil, hmacutil};
+use crate::{cmdutil, hmacutil, util};
 
 pub struct CommandImpl;
 
@@ -32,10 +32,8 @@ impl Command for CommandImpl {
         if json_output {
             let mut json = BTreeMap::<&'_ str, String>::new();
             json.insert("ciphertext", hmac_encrypt_ciphertext);
-            println!(
-                "{}",
-                serde_json::to_string_pretty(&json).expect("Convert to JSON failed!")
-            );
+
+            util::print_pretty_json(&json);
         } else {
             success!("HMAC encrypt ciphertext: {}", hmac_encrypt_ciphertext);
         }