aboutsummaryrefslogtreecommitdiff
path: root/src/args.rs
blob: 0c8feb32b84a27d0ac1b28cc7d502543ae387e83 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
// args.rs

// *************************************************************************
// * Copyright (C) 2018-2020 Daniel Mueller (deso@posteo.net)              *
// *                                                                       *
// * This program is free software: you can redistribute it and/or modify  *
// * it under the terms of the GNU General Public License as published by  *
// * the Free Software Foundation, either version 3 of the License, or     *
// * (at your option) any later version.                                   *
// *                                                                       *
// * This program is distributed in the hope that it will be useful,       *
// * but WITHOUT ANY WARRANTY; without even the implied warranty of        *
// * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
// * GNU General Public License for more details.                          *
// *                                                                       *
// * You should have received a copy of the GNU General Public License     *
// * along with this program.  If not, see <http://www.gnu.org/licenses/>. *
// *************************************************************************

use std::ffi;
use std::io;
use std::result;
use std::str;

use crate::commands;
use crate::error::Error;
use crate::pinentry;
use crate::RunCtx;

type Result<T> = result::Result<T, Error>;

/// Wraps a writer and buffers its output.
///
/// This implementation is similar to `io::BufWriter`, but:
/// - The inner writer is only written to if `flush` is called.
/// - The buffer may grow infinitely large.
struct BufWriter<'w, W: io::Write + ?Sized> {
  buf: Vec<u8>,
  inner: &'w mut W,
}

impl<'w, W: io::Write + ?Sized> BufWriter<'w, W> {
  pub fn new(inner: &'w mut W) -> Self {
    BufWriter {
      buf: Vec::with_capacity(128),
      inner,
    }
  }
}

impl<'w, W: io::Write + ?Sized> io::Write for BufWriter<'w, W> {
  fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
    self.buf.extend_from_slice(buf);
    Ok(buf.len())
  }

  fn flush(&mut self) -> io::Result<()> {
    self.inner.write_all(&self.buf)?;
    self.buf.clear();
    self.inner.flush()
  }
}

trait Stdio {
  fn stdio(&mut self) -> (&mut dyn io::Write, &mut dyn io::Write);
}

impl<'io> Stdio for RunCtx<'io> {
  fn stdio(&mut self) -> (&mut dyn io::Write, &mut dyn io::Write) {
    (self.stdout, self.stderr)
  }
}

impl<W> Stdio for (&mut W, &mut W)
where
  W: io::Write,
{
  fn stdio(&mut self) -> (&mut dyn io::Write, &mut dyn io::Write) {
    (self.0, self.1)
  }
}

/// A command execution context that captures additional data pertaining
/// the command execution.
pub struct ExecCtx<'io> {
  pub model: Option<DeviceModel>,
  pub stdout: &'io mut dyn io::Write,
  pub stderr: &'io mut dyn io::Write,
  pub admin_pin: Option<ffi::OsString>,
  pub user_pin: Option<ffi::OsString>,
  pub new_admin_pin: Option<ffi::OsString>,
  pub new_user_pin: Option<ffi::OsString>,
  pub password: Option<ffi::OsString>,
  pub no_cache: bool,
  pub verbosity: u64,
}

impl<'io> Stdio for ExecCtx<'io> {
  fn stdio(&mut self) -> (&mut dyn io::Write, &mut dyn io::Write) {
    (self.stdout, self.stderr)
  }
}

/// The available Nitrokey models.
#[allow(unused_doc_comments)]
Enum! {DeviceModel, [
  Pro => "pro",
  Storage => "storage",
]}

impl DeviceModel {
  pub fn as_user_facing_str(&self) -> &str {
    match self {
      DeviceModel::Pro => "Pro",
      DeviceModel::Storage => "Storage",
    }
  }
}

impl From<DeviceModel> for nitrokey::Model {
  fn from(model: DeviceModel) -> nitrokey::Model {
    match model {
      DeviceModel::Pro => nitrokey::Model::Pro,
      DeviceModel::Storage => nitrokey::Model::Storage,
    }
  }
}

/// A top-level command for nitrocli.
#[allow(unused_doc_comments)]
Command! {Command, [
  Config => ("config", config),
  Encrypted => ("encrypted", encrypted),
  Hidden => ("hidden", hidden),
  Lock => ("lock", lock),
  Otp => ("otp", otp),
  Pin => ("pin", pin),
  Pws => ("pws", pws),
  Reset => ("reset", reset),
  Status => ("status", status),
  Unencrypted => ("unencrypted", unencrypted),
]}

Command! {ConfigCommand, [
  Get => ("get", config_get),
  Set => ("set", config_set),
]}

#[derive(Clone, Copy, Debug)]
pub enum ConfigOption<T> {
  Enable(T),
  Disable,
  Ignore,
}

impl<T> ConfigOption<T> {
  fn try_from(disable: bool, value: Option<T>, name: &'static str) -> Result<Self> {
    if disable {
      if value.is_some() {
        Err(Error::Error(format!(
          "--{name} and --no-{name} are mutually exclusive",
          name = name
        )))
      } else {
        Ok(ConfigOption::Disable)
      }
    } else {
      match value {
        Some(value) => Ok(ConfigOption::Enable(value)),
        None => Ok(ConfigOption::Ignore),
      }
    }
  }

  pub fn or(self, default: Option<T>) -> Option<T> {
    match self {
      ConfigOption::Enable(value) => Some(value),
      ConfigOption::Disable => None,
      ConfigOption::Ignore => default,
    }
  }
}

Command! {OtpCommand, [
  Clear => ("clear", otp_clear),
  Get => ("get", otp_get),
  Set => ("set", otp_set),
  Status => ("status", otp_status),
]}

Enum! {OtpAlgorithm, [
  Hotp => "hotp",
  Totp => "totp",
]}

Enum! {OtpMode, [
  SixDigits => "6",
  EightDigits => "8",
]}

impl From<OtpMode> for nitrokey::OtpMode {
  fn from(mode: OtpMode) -> Self {
    match mode {
      OtpMode::SixDigits => nitrokey::OtpMode::SixDigits,
      OtpMode::EightDigits => nitrokey::OtpMode::EightDigits,
    }
  }
}

Enum! {OtpSecretFormat, [
  Ascii => "ascii",
  Base32 => "base32",
  Hex => "hex",
]}

Command! {PinCommand, [
  Clear => ("clear", pin_clear),
  Set => ("set", pin_set),
  Unblock => ("unblock", pin_unblock),
]}

Command! {PwsCommand, [
  Clear => ("clear", pws_clear),
  Get => ("get", pws_get),
  Set => ("set", pws_set),
  Status => ("status", pws_status),
]}

fn parse(
  ctx: &mut impl Stdio,
  parser: argparse::ArgumentParser<'_>,
  args: Vec<String>,
) -> Result<()> {
  let (stdout, stderr) = ctx.stdio();
  let result = parser
    .parse(args, stdout, stderr)
    .map_err(Error::ArgparseError);
  drop(parser);
  result
}

/// Inquire the status of the Nitrokey.
fn status(ctx: &mut ExecCtx<'_>, args: Vec<String>) -> Result<()> {
  let mut parser = argparse::ArgumentParser::new();
  parser.set_description("Prints the status of the connected Nitrokey device");
  parse(ctx, parser, args)?;

  commands::status(ctx)
}

/// Perform a factory reset.
fn reset(ctx: &mut ExecCtx<'_>, args: Vec<String>) -> Result<()> {
  let mut parser = argparse::ArgumentParser::new();
  parser.set_description("Performs a factory reset");
  parse(ctx, parser, args)?;

  commands::reset(ctx)
}

Command! {UnencryptedCommand, [
  Set => ("set", unencrypted_set),
]}

Enum! {UnencryptedVolumeMode, [
  ReadWrite => "read-write",
  ReadOnly => "read-only",
]}

/// Execute an unencrypted subcommand.
fn unencrypted(ctx: &mut ExecCtx<'_>, args: Vec<String>) -> Result<()> {
  let mut subcommand = UnencryptedCommand::Set;
  let help = cmd_help!(subcommand);
  let mut subargs = vec![];
  let mut parser = argparse::ArgumentParser::new();
  parser.set_description("Interacts with the device's unencrypted volume");
  let _ =
    parser
      .refer(&mut subcommand)
      .required()
      .add_argument("subcommand", argparse::Store, &help);
  let _ = parser.refer(&mut subargs).add_argument(
    "arguments",
    argparse::List,
    "The arguments for the subcommand",
  );
  parser.stop_on_first_argument(true);
  parse(ctx, parser, args)?;

  subargs.insert(
    0,
    format!(
      "{} {} {}",
      crate::NITROCLI,
      Command::Unencrypted,
      subcommand,
    ),
  );
  subcommand.execute(ctx, subargs)
}

/// Change the configuration of the unencrypted volume.
fn unencrypted_set(ctx: &mut ExecCtx<'_>, args: Vec<String>) -> Result<()> {
  let mut mode = UnencryptedVolumeMode::ReadWrite;
  let help = format!("The mode to change to ({})", fmt_enum!(mode));
  let mut parser = argparse::ArgumentParser::new();
  parser
    .set_description("Changes the configuration of the unencrypted volume on a Nitrokey Storage");
  let _ = parser
    .refer(&mut mode)
    .required()
    .add_argument("type", argparse::Store, &help);
  parse(ctx, parser, args)?;

  commands::unencrypted_set(ctx, mode)
}

Command! {EncryptedCommand, [
  Close => ("close", encrypted_close),
  Open => ("open", encrypted_open),
]}

/// Execute an encrypted subcommand.
fn encrypted(ctx: &mut ExecCtx<'_>, args: Vec<String>) -> Result<()> {
  let mut subcommand = EncryptedCommand::Open;
  let help = cmd_help!(subcommand);
  let mut subargs = vec![];
  let mut parser = argparse::ArgumentParser::new();
  parser.set_description("Interacts with the device's encrypted volume");
  let _ =
    parser
      .refer(&mut subcommand)
      .required()
      .add_argument("subcommand", argparse::Store, &help);
  let _ = parser.refer(&mut subargs).add_argument(
    "arguments",
    argparse::List,
    "The arguments for the subcommand",
  );
  parser.stop_on_first_argument(true);
  parse(ctx, parser, args)?;

  subargs.insert(
    0,
    format!("{} {} {}", crate::NITROCLI, Command::Encrypted, subcommand),
  );
  subcommand.execute(ctx, subargs)
}

/// Open the encrypted volume on the Nitrokey.
fn encrypted_open(ctx: &mut ExecCtx<'_>, args: Vec<String>) -> Result<()> {
  let mut parser = argparse::ArgumentParser::new();
  parser.set_description("Opens the encrypted volume on a Nitrokey Storage");
  parse(ctx, parser, args)?;

  commands::encrypted_open(ctx)
}

/// Close the previously opened encrypted volume.
fn encrypted_close(ctx: &mut ExecCtx<'_>, args: Vec<String>) -> Result<()> {
  let mut parser = argparse::ArgumentParser::new();
  parser.set_description("Closes the encrypted volume on a Nitrokey Storage");
  parse(ctx, parser, args)?;

  commands::encrypted_close(ctx)
}

Command! {HiddenCommand, [
  Close => ("close", hidden_close),
  Create => ("create", hidden_create),
  Open => ("open", hidden_open),
]}

/// Execute a hidden subcommand.
fn hidden(ctx: &mut ExecCtx<'_>, args: Vec<String>) -> Result<()> {
  let mut subcommand = HiddenCommand::Open;
  let help = cmd_help!(subcommand);
  let mut subargs = vec![];
  let mut parser = argparse::ArgumentParser::new();
  parser.set_description("Interacts with the device's hidden volume");
  let _ =
    parser
      .refer(&mut subcommand)
      .required()
      .add_argument("subcommand", argparse::Store, &help);
  let _ = parser.refer(&mut subargs).add_argument(
    "arguments",
    argparse::List,
    "The arguments for the subcommand",
  );
  parser.stop_on_first_argument(true);
  parse(ctx, parser, args)?;

  subargs.insert(
    0,
    format!("{} {} {}", crate::NITROCLI, Command::Hidden, subcommand),
  );
  subcommand.execute(ctx, subargs)
}

fn hidden_create(ctx: &mut ExecCtx<'_>, args: Vec<String>) -> Result<()> {
  let mut slot: u8 = 0;
  let mut start: u8 = 0;
  let mut end: u8 = 0;
  let mut parser = argparse::ArgumentParser::new();
  parser.set_description("Creates a hidden volume on a Nitrokey Storage");
  let _ = parser.refer(&mut slot).required().add_argument(
    "slot",
    argparse::Store,
    "The hidden volume slot to use",
  );
  let _ = parser.refer(&mut start).required().add_argument(
    "start",
    argparse::Store,
    "The start location of the hidden volume as percentage of the \
     encrypted volume's size (0-99)",
  );
  let _ = parser.refer(&mut end).required().add_argument(
    "end",
    argparse::Store,
    "The end location of the hidden volume as percentage of the \
     encrypted volume's size (1-100)",
  );
  parse(ctx, parser, args)?;

  commands::hidden_create(ctx, slot, start, end)
}

fn hidden_open(ctx: &mut ExecCtx<'_>, args: Vec<String>) -> Result<()> {
  let mut parser = argparse::ArgumentParser::new();
  parser.set_description("Opens a hidden volume on a Nitrokey Storage");
  parse(ctx, parser, args)?;

  commands::hidden_open(ctx)
}

fn hidden_close(ctx: &mut ExecCtx<'_>, args: Vec<String>) -> Result<()> {
  let mut parser = argparse::ArgumentParser::new();
  parser.set_description("Closes the hidden volume on a Nitrokey Storage");
  parse(ctx, parser, args)?;

  commands::hidden_close(ctx)
}

/// Execute a config subcommand.
fn config(ctx: &mut ExecCtx<'_>, args: Vec<String>) -> Result<()> {
  let mut subcommand = ConfigCommand::Get;
  let help = cmd_help!(subcommand);
  let mut subargs = vec![];
  let mut parser = argparse::ArgumentParser::new();
  parser.set_description("Reads or writes the device configuration");
  let _ =
    parser
      .refer(&mut subcommand)
      .required()
      .add_argument("subcommand", argparse::Store, &help);
  let _ = parser.refer(&mut subargs).add_argument(
    "arguments",
    argparse::List,
    "The arguments for the subcommand",
  );
  parser.stop_on_first_argument(true);
  parse(ctx, parser, args)?;

  subargs.insert(
    0,
    format!("{} {} {}", crate::NITROCLI, Command::Config, subcommand),
  );
  subcommand.execute(ctx, subargs)
}

/// Read the Nitrokey configuration.
fn config_get(ctx: &mut ExecCtx<'_>, args: Vec<String>) -> Result<()> {
  let mut parser = argparse::ArgumentParser::new();
  parser.set_description("Prints the Nitrokey configuration");
  parse(ctx, parser, args)?;

  commands::config_get(ctx)
}

/// Write the Nitrokey configuration.
fn config_set(ctx: &mut ExecCtx<'_>, args: Vec<String>) -> Result<()> {
  let mut numlock = None;
  let mut no_numlock = false;
  let mut capslock = None;
  let mut no_capslock = false;
  let mut scrollock = None;
  let mut no_scrollock = false;
  let mut otp_pin = false;
  let mut no_otp_pin = false;
  let mut parser = argparse::ArgumentParser::new();
  parser.set_description("Changes the Nitrokey configuration");
  let _ = parser.refer(&mut numlock).add_option(
    &["-n", "--numlock"],
    argparse::StoreOption,
    "Set the numlock option to the given HOTP slot",
  );
  let _ = parser.refer(&mut no_numlock).add_option(
    &["-N", "--no-numlock"],
    argparse::StoreTrue,
    "Unset the numlock option",
  );
  let _ = parser.refer(&mut capslock).add_option(
    &["-c", "--capslock"],
    argparse::StoreOption,
    "Set the capslock option to the given HOTP slot",
  );
  let _ = parser.refer(&mut no_capslock).add_option(
    &["-C", "--no-capslock"],
    argparse::StoreTrue,
    "Unset the capslock option",
  );
  let _ = parser.refer(&mut scrollock).add_option(
    &["-s", "--scrollock"],
    argparse::StoreOption,
    "Set the scrollock option to the given HOTP slot",
  );
  let _ = parser.refer(&mut no_scrollock).add_option(
    &["-S", "--no-scrollock"],
    argparse::StoreTrue,
    "Unset the scrollock option",
  );
  let _ = parser.refer(&mut otp_pin).add_option(
    &["-o", "--otp-pin"],
    argparse::StoreTrue,
    "Require the user PIN to generate one-time passwords",
  );
  let _ = parser.refer(&mut no_otp_pin).add_option(
    &["-O", "--no-otp-pin"],
    argparse::StoreTrue,
    "Allow one-time password generation without PIN",
  );
  parse(ctx, parser, args)?;

  let numlock = ConfigOption::try_from(no_numlock, numlock, "numlock")?;
  let capslock = ConfigOption::try_from(no_capslock, capslock, "capslock")?;
  let scrollock = ConfigOption::try_from(no_scrollock, scrollock, "scrollock")?;
  let otp_pin = if otp_pin {
    Some(true)
  } else if no_otp_pin {
    Some(false)
  } else {
    None
  };
  commands::config_set(ctx, numlock, capslock, scrollock, otp_pin)
}

/// Lock the Nitrokey.
fn lock(ctx: &mut ExecCtx<'_>, args: Vec<String>) -> Result<()> {
  let mut parser = argparse::ArgumentParser::new();
  parser.set_description("Locks the connected Nitrokey device");
  parse(ctx, parser, args)?;

  commands::lock(ctx)
}

/// Execute an OTP subcommand.
fn otp(ctx: &mut ExecCtx<'_>, args: Vec<String>) -> Result<()> {
  let mut subcommand = OtpCommand::Get;
  let help = cmd_help!(subcommand);
  let mut subargs = vec![];
  let mut parser = argparse::ArgumentParser::new();
  parser.set_description("Accesses one-time passwords");
  let _ =
    parser
      .refer(&mut subcommand)
      .required()
      .add_argument("subcommand", argparse::Store, &help);
  let _ = parser.refer(&mut subargs).add_argument(
    "arguments",
    argparse::List,
    "The arguments for the subcommand",
  );
  parser.stop_on_first_argument(true);
  parse(ctx, parser, args)?;

  subargs.insert(
    0,
    format!("{} {} {}", crate::NITROCLI, Command::Otp, subcommand),
  );
  subcommand.execute(ctx, subargs)
}

/// Generate a one-time password on the Nitrokey device.
fn otp_get(ctx: &mut ExecCtx<'_>, args: Vec<String>) -> Result<()> {
  let mut slot: u8 = 0;
  let mut algorithm = OtpAlgorithm::Totp;
  let help = format!(
    "The OTP algorithm to use ({}, default: {})",
    fmt_enum!(algorithm),
    algorithm
  );
  let mut time: Option<u64> = None;
  let mut parser = argparse::ArgumentParser::new();
  parser.set_description("Generates a one-time password");
  let _ =
    parser
      .refer(&mut slot)
      .required()
      .add_argument("slot", argparse::Store, "The OTP slot to use");
  let _ = parser
    .refer(&mut algorithm)
    .add_option(&["-a", "--algorithm"], argparse::Store, &help);
  let _ = parser.refer(&mut time).add_option(
    &["-t", "--time"],
    argparse::StoreOption,
    "The time to use for TOTP generation (Unix timestamp, default: system time)",
  );
  parse(ctx, parser, args)?;

  commands::otp_get(ctx, slot, algorithm, time)
}

/// Configure a one-time password slot on the Nitrokey device.
pub fn otp_set(ctx: &mut ExecCtx<'_>, args: Vec<String>) -> Result<()> {
  let mut slot: u8 = 0;
  let mut algorithm = OtpAlgorithm::Totp;
  let algo_help = format!(
    "The OTP algorithm to use ({}, default: {})",
    fmt_enum!(algorithm),
    algorithm
  );
  let mut name = "".to_owned();
  let mut secret = "".to_owned();
  let mut digits = OtpMode::SixDigits;
  let mut counter: u64 = 0;
  let mut time_window: u16 = 30;
  let mut secret_format = OtpSecretFormat::Hex;
  let fmt_help = format!(
    "The format of the secret ({}, default: {})",
    fmt_enum!(OtpSecretFormat::all_variants()),
    secret_format,
  );
  let mut parser = argparse::ArgumentParser::new();
  parser.set_description("Configures a one-time password slot");
  let _ =
    parser
      .refer(&mut slot)
      .required()
      .add_argument("slot", argparse::Store, "The OTP slot to use");
  let _ =
    parser
      .refer(&mut algorithm)
      .add_option(&["-a", "--algorithm"], argparse::Store, &algo_help);
  let _ = parser.refer(&mut name).required().add_argument(
    "name",
    argparse::Store,
    "The name of the slot",
  );
  let _ = parser.refer(&mut secret).required().add_argument(
    "secret",
    argparse::Store,
    "The secret to store on the slot as a hexadecimal string (unless overwritten by --format)",
  );
  let _ = parser.refer(&mut digits).add_option(
    &["-d", "--digits"],
    argparse::Store,
    "The number of digits to use for the one-time password (6 or 8, default: 6)",
  );
  let _ = parser.refer(&mut counter).add_option(
    &["-c", "--counter"],
    argparse::Store,
    "The counter value for HOTP (default: 0)",
  );
  let _ = parser.refer(&mut time_window).add_option(
    &["-t", "--time-window"],
    argparse::Store,
    "The time window for TOTP (default: 30)",
  );
  let _ =
    parser
      .refer(&mut secret_format)
      .add_option(&["-f", "--format"], argparse::Store, &fmt_help);
  parse(ctx, parser, args)?;

  let data = nitrokey::OtpSlotData {
    number: slot,
    name,
    secret,
    mode: nitrokey::OtpMode::from(digits),
    use_enter: false,
    token_id: None,
  };
  commands::otp_set(ctx, data, algorithm, counter, time_window, secret_format)
}

/// Clear an OTP slot.
fn otp_clear(ctx: &mut ExecCtx<'_>, args: Vec<String>) -> Result<()> {
  let mut slot: u8 = 0;
  let mut algorithm = OtpAlgorithm::Totp;
  let help = format!(
    "The OTP algorithm to use ({}, default: {})",
    fmt_enum!(algorithm),
    algorithm
  );
  let mut parser = argparse::ArgumentParser::new();
  parser.set_description("Clears a one-time password slot");
  let _ = parser.refer(&mut slot).required().add_argument(
    "slot",
    argparse::Store,
    "The OTP slot to clear",
  );
  let _ = parser
    .refer(&mut algorithm)
    .add_option(&["-a", "--algorithm"], argparse::Store, &help);
  parse(ctx, parser, args)?;

  commands::otp_clear(ctx, slot, algorithm)
}

/// Print the status of the OTP slots.
fn otp_status(ctx: &mut ExecCtx<'_>, args: Vec<String>) -> Result<()> {
  let mut all = false;
  let mut parser = argparse::ArgumentParser::new();
  parser.set_description("Prints the status of the OTP slots");
  let _ = parser.refer(&mut all).add_option(
    &["-a", "--all"],
    argparse::StoreTrue,
    "Show slots that are not programmed",
  );
  parse(ctx, parser, args)?;

  commands::otp_status(ctx, all)
}

/// Execute a PIN subcommand.
fn pin(ctx: &mut ExecCtx<'_>, args: Vec<String>) -> Result<()> {
  let mut subcommand = PinCommand::Clear;
  let help = cmd_help!(subcommand);
  let mut subargs = vec![];
  let mut parser = argparse::ArgumentParser::new();
  parser.set_description("Manages the Nitrokey PINs");
  let _ =
    parser
      .refer(&mut subcommand)
      .required()
      .add_argument("subcommand", argparse::Store, &help);
  let _ = parser.refer(&mut subargs).add_argument(
    "arguments",
    argparse::List,
    "The arguments for the subcommand",
  );
  parser.stop_on_first_argument(true);
  parse(ctx, parser, args)?;

  subargs.insert(
    0,
    format!("{} {} {}", crate::NITROCLI, Command::Pin, subcommand),
  );
  subcommand.execute(ctx, subargs)
}

/// Clear the PIN as cached by various other commands.
fn pin_clear(ctx: &mut ExecCtx<'_>, args: Vec<String>) -> Result<()> {
  let mut parser = argparse::ArgumentParser::new();
  parser.set_description("Clears the cached PINs");
  parse(ctx, parser, args)?;

  commands::pin_clear(ctx)
}

/// Change a PIN.
fn pin_set(ctx: &mut ExecCtx<'_>, args: Vec<String>) -> Result<()> {
  let mut pintype = pinentry::PinType::User;
  let help = format!("The PIN type to change ({})", fmt_enum!(pintype));
  let mut parser = argparse::ArgumentParser::new();
  parser.set_description("Changes a PIN");
  let _ = parser
    .refer(&mut pintype)
    .required()
    .add_argument("type", argparse::Store, &help);
  parse(ctx, parser, args)?;

  commands::pin_set(ctx, pintype)
}

/// Unblock and reset the user PIN.
fn pin_unblock(ctx: &mut ExecCtx<'_>, args: Vec<String>) -> Result<()> {
  let mut parser = argparse::ArgumentParser::new();
  parser.set_description("Unblocks and resets the user PIN");
  parse(ctx, parser, args)?;

  commands::pin_unblock(ctx)
}

/// Execute a PWS subcommand.
fn pws(ctx: &mut ExecCtx<'_>, args: Vec<String>) -> Result<()> {
  let mut subcommand = PwsCommand::Get;
  let mut subargs = vec![];
  let help = cmd_help!(subcommand);
  let mut parser = argparse::ArgumentParser::new();
  parser.set_description("Accesses the password safe");
  let _ =
    parser
      .refer(&mut subcommand)
      .required()
      .add_argument("subcommand", argparse::Store, &help);
  let _ = parser.refer(&mut subargs).add_argument(
    "arguments",
    argparse::List,
    "The arguments for the subcommand",
  );
  parser.stop_on_first_argument(true);
  parse(ctx, parser, args)?;

  subargs.insert(
    0,
    format!("{} {} {}", crate::NITROCLI, Command::Pws, subcommand),
  );
  subcommand.execute(ctx, subargs)
}

/// Access a slot of the password safe on the Nitrokey.
fn pws_get(ctx: &mut ExecCtx<'_>, args: Vec<String>) -> Result<()> {
  let mut slot: u8 = 0;
  let mut name = false;
  let mut login = false;
  let mut password = false;
  let mut quiet = false;
  let mut parser = argparse::ArgumentParser::new();
  parser.set_description("Reads a password safe slot");
  let _ = parser.refer(&mut slot).required().add_argument(
    "slot",
    argparse::Store,
    "The PWS slot to read",
  );
  let _ = parser.refer(&mut name).add_option(
    &["-n", "--name"],
    argparse::StoreTrue,
    "Show the name stored on the slot",
  );
  let _ = parser.refer(&mut login).add_option(
    &["-l", "--login"],
    argparse::StoreTrue,
    "Show the login stored on the slot",
  );
  let _ = parser.refer(&mut password).add_option(
    &["-p", "--password"],
    argparse::StoreTrue,
    "Show the password stored on the slot",
  );
  let _ = parser.refer(&mut quiet).add_option(
    &["-q", "--quiet"],
    argparse::StoreTrue,
    "Print the stored data without description",
  );
  parse(ctx, parser, args)?;

  commands::pws_get(ctx, slot, name, login, password, quiet)
}

/// Set a slot of the password safe on the Nitrokey.
fn pws_set(ctx: &mut ExecCtx<'_>, args: Vec<String>) -> Result<()> {
  let mut slot: u8 = 0;
  let mut name = String::new();
  let mut login = String::new();
  let mut password = String::new();
  let mut parser = argparse::ArgumentParser::new();
  parser.set_description("Writes a password safe slot");
  let _ = parser.refer(&mut slot).required().add_argument(
    "slot",
    argparse::Store,
    "The PWS slot to write",
  );
  let _ = parser.refer(&mut name).required().add_argument(
    "name",
    argparse::Store,
    "The name to store on the slot",
  );
  let _ = parser.refer(&mut login).required().add_argument(
    "login",
    argparse::Store,
    "The login to store on the slot",
  );
  let _ = parser.refer(&mut password).required().add_argument(
    "password",
    argparse::Store,
    "The password to store on the slot",
  );
  parse(ctx, parser, args)?;

  commands::pws_set(ctx, slot, &name, &login, &password)
}

/// Clear a PWS slot.
fn pws_clear(ctx: &mut ExecCtx<'_>, args: Vec<String>) -> Result<()> {
  let mut slot: u8 = 0;
  let mut parser = argparse::ArgumentParser::new();
  parser.set_description("Clears a password safe slot");
  let _ = parser.refer(&mut slot).required().add_argument(
    "slot",
    argparse::Store,
    "The PWS slot to clear",
  );
  parse(ctx, parser, args)?;

  commands::pws_clear(ctx, slot)
}

/// Print the status of the PWS slots.
fn pws_status(ctx: &mut ExecCtx<'_>, args: Vec<String>) -> Result<()> {
  let mut all = false;
  let mut parser = argparse::ArgumentParser::new();
  parser.set_description("Prints the status of the PWS slots");
  let _ = parser.refer(&mut all).add_option(
    &["-a", "--all"],
    argparse::StoreTrue,
    "Show slots that are not programmed",
  );
  parse(ctx, parser, args)?;

  commands::pws_status(ctx, all)
}

/// Parse the command-line arguments and execute the selected command.
pub(crate) fn handle_arguments(ctx: &mut RunCtx<'_>, args: Vec<String>) -> Result<()> {
  use std::io::Write;

  let mut version = false;
  let mut model: Option<DeviceModel> = None;
  let model_help = format!(
    "Select the device model to connect to ({})",
    fmt_enum!(DeviceModel::all_variants())
  );
  let mut verbosity = 0;
  let mut command = Command::Status;
  let cmd_help = cmd_help!(command);
  let mut subargs = vec![];
  let mut parser = argparse::ArgumentParser::new();
  let _ = parser.refer(&mut version).add_option(
    &["-V", "--version"],
    argparse::StoreTrue,
    "Print version information and exit",
  );
  let _ = parser.refer(&mut verbosity).add_option(
    &["-v", "--verbose"],
    argparse::IncrBy::<u64>(1),
    "Increase the log level (can be supplied multiple times)",
  );
  let _ =
    parser
      .refer(&mut model)
      .add_option(&["-m", "--model"], argparse::StoreOption, &model_help);
  parser.set_description("Provides access to a Nitrokey device");
  let _ = parser
    .refer(&mut command)
    .required()
    .add_argument("command", argparse::Store, &cmd_help);
  let _ = parser.refer(&mut subargs).add_argument(
    "arguments",
    argparse::List,
    "The arguments for the command",
  );
  parser.stop_on_first_argument(true);

  let mut stdout_buf = BufWriter::new(ctx.stdout);
  let mut stderr_buf = BufWriter::new(ctx.stderr);
  let mut stdio_buf = (&mut stdout_buf, &mut stderr_buf);
  let result = parse(&mut stdio_buf, parser, args);

  if version {
    println!(ctx, "{} {}", crate::NITROCLI, env!("CARGO_PKG_VERSION"))?;
    Ok(())
  } else {
    stdout_buf.flush()?;
    stderr_buf.flush()?;

    result?;
    subargs.insert(0, format!("{} {}", crate::NITROCLI, command));

    let mut ctx = ExecCtx {
      model,
      stdout: ctx.stdout,
      stderr: ctx.stderr,
      admin_pin: ctx.admin_pin.take(),
      user_pin: ctx.user_pin.take(),
      new_admin_pin: ctx.new_admin_pin.take(),
      new_user_pin: ctx.new_user_pin.take(),
      password: ctx.password.take(),
      no_cache: ctx.no_cache,
      verbosity,
    };
    command.execute(&mut ctx, subargs)
  }
}