diff --git a/justfile b/justfile
index 43dabec..7764956 100644
--- a/justfile
+++ b/justfile
@@ -11,7 +11,7 @@ build-simple:
 
 # install without default features
 install-simple:
-  cargo install --no-default-features
+  cargo install --no-default-features --path .
 
 # run --help
 help:
diff --git a/src/cmd_pivecsign.rs b/src/cmd_pivecsign.rs
index 9a121b7..fabff4d 100644
--- a/src/cmd_pivecsign.rs
+++ b/src/cmd_pivecsign.rs
@@ -8,7 +8,7 @@ use yubikey::piv::{metadata, sign_data, AlgorithmId, ManagementAlgorithmId};
 use yubikey::YubiKey;
 
 use crate::util::base64_encode;
-use crate::{argsutil, pinutil, pivutil};
+use crate::{argsutil, pivutil};
 
 pub struct CommandImpl;
 
@@ -33,8 +33,6 @@ impl Command for CommandImpl {
 
         let mut json = BTreeMap::<&'_ str, String>::new();
 
-        let pin_opt = pinutil::read_pin(sub_arg_matches);
-
         let slot = opt_value_result!(sub_arg_matches.value_of("slot"), "--slot must assigned, e.g. 82, 83 ... 95, 9a, 9c, 9d, 9e");
         let hash_bytes = argsutil::get_sha256_digest_or_hash(sub_arg_matches)?;
         let (algorithm, algorithm_str) = match sub_arg_matches.value_of("algorithm") {
@@ -45,6 +43,7 @@ impl Command for CommandImpl {
 
         let mut yk = opt_result!(YubiKey::open(), "YubiKey not found: {}");
         let slot_id = pivutil::get_slot_id(slot)?;
+        let pin_opt = pivutil::check_read_pin(&mut yk, slot_id, sub_arg_matches);
 
         if let Some(pin) = &pin_opt {
             opt_result!(yk.verify_pin(pin.as_bytes()), "YubiKey verify pin failed: {}");
diff --git a/src/cmd_signjwt.rs b/src/cmd_signjwt.rs
index 3a93ac1..a654677 100644
--- a/src/cmd_signjwt.rs
+++ b/src/cmd_signjwt.rs
@@ -8,9 +8,9 @@ use rust_util::{util_msg, util_time, XResult};
 use rust_util::util_clap::{Command, CommandError};
 use serde_json::{Map, Number, Value};
 use yubikey::{Certificate, YubiKey};
-use yubikey::piv::{AlgorithmId, sign_data};
+use yubikey::piv::{AlgorithmId, sign_data, SlotId};
 
-use crate::{digest, pinutil, pivutil, rsautil, util};
+use crate::{digest, pivutil, rsautil, util};
 
 const SEPARATOR: &str = ".";
 
@@ -38,7 +38,6 @@ impl Command for CommandImpl {
 
         let mut json = BTreeMap::<&'_ str, String>::new();
 
-        let pin_opt = pinutil::read_pin(sub_arg_matches);
         let slot = opt_value_result!(
             sub_arg_matches.value_of("slot"), "--slot must assigned, e.g. 82, 83 ... 95, 9a, 9c, 9d, 9e");
 
@@ -97,7 +96,11 @@ impl Command for CommandImpl {
             }
         }
 
-        let token_string = sign_jwt(slot, &pin_opt, header, &payload, &jwt_claims)?;
+        let mut yk = opt_result!(YubiKey::open(), "Find YubiKey failed: {}");
+        let slot_id = opt_result!(pivutil::get_slot_id(slot), "Get slot id failed: {}");
+        let pin_opt = pivutil::check_read_pin(&mut yk, slot_id, sub_arg_matches);
+
+        let token_string = sign_jwt(&mut yk, slot_id, &pin_opt, header, &payload, &jwt_claims)?;
         success!("Singed JWT: {}", token_string);
         if json_output { json.insert("token", token_string.clone()); }
 
@@ -109,15 +112,11 @@ impl Command for CommandImpl {
 }
 
 
-fn sign_jwt(slot: &str, pin_opt: &Option<String>, mut header: Header, payload: &Option<&str>, claims: &Map<String, Value>) -> XResult<String> {
-    let mut yk = opt_result!(YubiKey::open(), "Find YubiKey failed: {}");
-    let slot_id = opt_result!(pivutil::get_slot_id(slot), "Get slot id failed: {}");
-
+fn sign_jwt(yk: &mut YubiKey, slot_id: SlotId, pin_opt: &Option<String>, mut header: Header, payload: &Option<&str>, claims: &Map<String, Value>) -> XResult<String> {
     if let Some(pin) = pin_opt {
         opt_result!(yk.verify_pin(pin.as_bytes()), "YubiKey verify pin failed: {}");
     }
-
-    let cert = match Certificate::read(&mut yk, slot_id) {
+    let cert = match Certificate::read(yk, slot_id) {
         Ok(c) => c,
         Err(e) => return simple_error!("Read YubiKey certificate failed: {}", e),
     };
@@ -153,7 +152,7 @@ fn sign_jwt(slot: &str, pin_opt: &Option<String>, mut header: Header, payload: &
     };
 
     let signed_data = opt_result!(
-        sign_data(&mut yk, &raw_in, yk_algorithm, slot_id), "Sign YubiKey failed: {}");
+        sign_data(yk, &raw_in, yk_algorithm, slot_id), "Sign YubiKey failed: {}");
 
     let signature = util::base64_encode_url_safe_no_pad(signed_data);
 
diff --git a/src/pivutil.rs b/src/pivutil.rs
index ad3b366..40750f3 100644
--- a/src/pivutil.rs
+++ b/src/pivutil.rs
@@ -1,11 +1,13 @@
+use clap::ArgMatches;
 use rust_util::XResult;
 use spki::{ObjectIdentifier, SubjectPublicKeyInfoOwned};
 use spki::der::{Decode, Encode};
 use x509_parser::prelude::FromDer;
 use x509_parser::public_key::RSAPublicKey;
-use yubikey::{Certificate, PinPolicy, TouchPolicy};
-use yubikey::piv::{AlgorithmId, ManagementAlgorithmId, ManagementSlotId, Origin, RetiredSlotId};
+use yubikey::{Certificate, PinPolicy, TouchPolicy, YubiKey};
+use yubikey::piv::{metadata, AlgorithmId, ManagementAlgorithmId, ManagementSlotId, Origin, RetiredSlotId};
 use yubikey::piv::SlotId;
+use crate::pinutil;
 
 const RSA: ObjectIdentifier = ObjectIdentifier::new_unwrap("1.2.840.113549.1.1.1");
 const ECC: ObjectIdentifier = ObjectIdentifier::new_unwrap("1.2.840.10045.2.1");
@@ -189,4 +191,27 @@ pub fn get_slot_id(slot: &str) -> XResult<SlotId> {
         "r20" | "95" => SlotId::Retired(RetiredSlotId::R20),
         _ => return simple_error!("Unknown slot: {}", slot),
     })
-}
\ No newline at end of file
+}
+
+pub fn check_read_pin(yk: &mut YubiKey, slot_id: SlotId, sub_arg_matches: &ArgMatches) -> Option<String> {
+    if never_use_pin(yk, slot_id) {
+        None
+    } else {
+        pinutil::read_pin(sub_arg_matches)
+    }
+}
+
+pub fn never_use_pin(yk: &mut YubiKey, slot_id: SlotId) -> bool {
+    match get(yk, slot_id) {
+        None => false,
+        Some((pin_policy, _)) => pin_policy == PinPolicy::Never,
+    }
+}
+
+pub fn get(yk: &mut YubiKey, slot_id: SlotId) -> Option<(PinPolicy, TouchPolicy)> {
+    let slot_metadata = match metadata(yk, slot_id){
+        Ok(meta) => meta,
+        Err(_) => return None,
+    };
+    slot_metadata.policy
+}