derivepassphrase.git

1) # SPDX-FileCopyrightText: 2024 Marco Ricci <software@the13thletter.info>

2) #
3) # SPDX-License-Identifier: MIT
4) 

5) """Command-line interface for derivepassphrase."""

6) 
7) from __future__ import annotations
8) 

9) import base64
10) import collections
11) import contextlib

12) import copy

13) import enum

14) import importlib

15) import inspect
16) import json

17) import logging

18) import os
19) import socket

20) import unicodedata

21) from typing import (
22)     TYPE_CHECKING,

23)     Literal,

24)     NoReturn,

25)     TextIO,
26)     cast,

27) )

28) 
29) import click

30) from typing_extensions import (
31)     Any,
32)     assert_never,
33) )
34) 

35) import derivepassphrase as dpp

36) from derivepassphrase import _types, exporter, ssh_agent, vault

37) 
38) if TYPE_CHECKING:
39)     import pathlib

40)     import types

41)     from collections.abc import (
42)         Iterator,
43)         Sequence,
44)     )

45) 
46) __author__ = dpp.__author__
47) __version__ = dpp.__version__
48) 
49) __all__ = ('derivepassphrase',)
50) 

51) PROG_NAME = 'derivepassphrase'
52) KEY_DISPLAY_LENGTH = 30
53) 
54) # Error messages
55) _INVALID_VAULT_CONFIG = 'Invalid vault config'
56) _AGENT_COMMUNICATION_ERROR = 'Error communicating with the SSH agent'
57) _NO_USABLE_KEYS = 'No usable SSH keys were found'
58) _EMPTY_SELECTION = 'Empty selection'

59) 
60) 

61) # Top-level
62) # =========
63) 
64) 
65) @click.command(
66)     context_settings={
67)         'help_option_names': ['-h', '--help'],
68)         'ignore_unknown_options': True,
69)         'allow_interspersed_args': False,
70)     },
71)     epilog=r"""
72)         Configuration is stored in a directory according to the
73)         DERIVEPASSPHRASE_PATH variable, which defaults to
74)         `~/.derivepassphrase` on UNIX-like systems and
75)         `C:\Users\<user>\AppData\Roaming\Derivepassphrase` on Windows.

76)     """,

77) )
78) @click.version_option(version=dpp.__version__, prog_name=PROG_NAME)
79) @click.argument('subcommand_args', nargs=-1, type=click.UNPROCESSED)
80) def derivepassphrase(
81)     *,
82)     subcommand_args: list[str],
83) ) -> None:
84)     """Derive a strong passphrase, deterministically, from a master secret.
85) 
86)     Using a master secret, derive a passphrase for a named service,
87)     subject to constraints e.g. on passphrase length, allowed
88)     characters, etc.  The exact derivation depends on the selected
89)     derivation scheme.  For each scheme, it is computationally
90)     infeasible to discern the master secret from the derived passphrase.
91)     The derivations are also deterministic, given the same inputs, thus
92)     the resulting passphrases need not be stored explicitly.  The
93)     service name and constraints themselves also generally need not be
94)     kept secret, depending on the scheme.
95) 
96)     The currently implemented subcommands are "vault" (for the scheme
97)     used by vault) and "export" (for exporting foreign configuration
98)     data).  See the respective `--help` output for instructions.  If no
99)     subcommand is given, we default to "vault".
100) 
101)     Deprecation notice: Defaulting to "vault" is deprecated.  Starting
102)     in v1.0, the subcommand must be specified explicitly.\f
103) 
104)     This is a [`click`][CLICK]-powered command-line interface function,
105)     and not intended for programmatic use.  Call with arguments
106)     `['--help']` to see full documentation of the interface.  (See also
107)     [`click.testing.CliRunner`][] for controlled, programmatic
108)     invocation.)
109) 

110)     [CLICK]: https://pypi.org/package/click/

111) 
112)     """  # noqa: D301
113)     if subcommand_args and subcommand_args[0] == 'export':
114)         return derivepassphrase_export.main(
115)             args=subcommand_args[1:],
116)             prog_name=f'{PROG_NAME} export',
117)             standalone_mode=False,
118)         )
119)     if not (subcommand_args and subcommand_args[0] == 'vault'):
120)         click.echo(
121)             (
122)                 f'{PROG_NAME}: Deprecation warning: A subcommand will be '
123)                 f'required in v1.0. See --help for available subcommands.'
124)             ),
125)             err=True,
126)         )
127)         click.echo(
128)             f'{PROG_NAME}: Warning: Defaulting to subcommand "vault".',
129)             err=True,
130)         )
131)     else:
132)         subcommand_args = subcommand_args[1:]
133)     return derivepassphrase_vault.main(
134)         args=subcommand_args,
135)         prog_name=f'{PROG_NAME} vault',
136)         standalone_mode=False,
137)     )
138) 
139) 
140) # Exporter
141) # ========
142) 
143) 
144) @click.command(
145)     context_settings={
146)         'help_option_names': ['-h', '--help'],
147)         'ignore_unknown_options': True,
148)         'allow_interspersed_args': False,
149)     }
150) )
151) @click.version_option(version=dpp.__version__, prog_name=PROG_NAME)
152) @click.argument('subcommand_args', nargs=-1, type=click.UNPROCESSED)
153) def derivepassphrase_export(
154)     *,
155)     subcommand_args: list[str],
156) ) -> None:
157)     """Export a foreign configuration to standard output.
158) 
159)     Read a foreign system configuration, extract all information from
160)     it, and export the resulting configuration to standard output.
161) 
162)     The only available subcommand is "vault", which implements the
163)     vault-native configuration scheme.  If no subcommand is given, we
164)     default to "vault".
165) 
166)     Deprecation notice: Defaulting to "vault" is deprecated.  Starting
167)     in v1.0, the subcommand must be specified explicitly.\f
168) 
169)     This is a [`click`][CLICK]-powered command-line interface function,
170)     and not intended for programmatic use.  Call with arguments
171)     `['--help']` to see full documentation of the interface.  (See also
172)     [`click.testing.CliRunner`][] for controlled, programmatic
173)     invocation.)
174) 

175)     [CLICK]: https://pypi.org/package/click/

176) 
177)     """  # noqa: D301
178)     if not (subcommand_args and subcommand_args[0] == 'vault'):
179)         click.echo(
180)             (
181)                 f'{PROG_NAME}: Deprecation warning: A subcommand will be '
182)                 f'required in v1.0. See --help for available subcommands.'
183)             ),
184)             err=True,
185)         )
186)         click.echo(
187)             f'{PROG_NAME}: Warning: Defaulting to subcommand "vault".',
188)             err=True,
189)         )
190)     else:
191)         subcommand_args = subcommand_args[1:]
192)     return derivepassphrase_export_vault.main(
193)         args=subcommand_args,
194)         prog_name=f'{PROG_NAME} export vault',
195)         standalone_mode=False,
196)     )
197) 
198) 
199) def _load_data(
200)     fmt: Literal['v0.2', 'v0.3', 'storeroom'],
201)     path: str | bytes | os.PathLike[str],
202)     key: bytes,
203) ) -> Any:  # noqa: ANN401
204)     contents: bytes
205)     module: types.ModuleType

206)     # Use match/case here once Python 3.9 becomes unsupported.
207)     if fmt == 'v0.2':
208)         module = importlib.import_module(
209)             'derivepassphrase.exporter.vault_native'
210)         )
211)         if module.STUBBED:
212)             raise ModuleNotFoundError
213)         with open(path, 'rb') as infile:
214)             contents = base64.standard_b64decode(infile.read())
215)         return module.export_vault_native_data(
216)             contents, key, try_formats=['v0.2']
217)         )
218)     elif fmt == 'v0.3':  # noqa: RET505
219)         module = importlib.import_module(
220)             'derivepassphrase.exporter.vault_native'
221)         )
222)         if module.STUBBED:
223)             raise ModuleNotFoundError
224)         with open(path, 'rb') as infile:
225)             contents = base64.standard_b64decode(infile.read())
226)         return module.export_vault_native_data(
227)             contents, key, try_formats=['v0.3']
228)         )
229)     elif fmt == 'storeroom':
230)         module = importlib.import_module('derivepassphrase.exporter.storeroom')
231)         if module.STUBBED:
232)             raise ModuleNotFoundError
233)         return module.export_storeroom_data(path, key)
234)     else:  # pragma: no cover
235)         assert_never(fmt)

236) 
237) 
238) @click.command(
239)     context_settings={'help_option_names': ['-h', '--help']},
240) )
241) @click.option(
242)     '-f',
243)     '--format',
244)     'formats',
245)     metavar='FMT',
246)     multiple=True,
247)     default=('v0.3', 'v0.2', 'storeroom'),
248)     type=click.Choice(['v0.2', 'v0.3', 'storeroom']),
249)     help='try the following storage formats, in order (default: v0.3, v0.2)',
250) )
251) @click.option(
252)     '-k',
253)     '--key',
254)     metavar='K',
255)     help=(
256)         'use K as the storage master key '
257)         '(default: check the `VAULT_KEY`, `LOGNAME`, `USER` or '
258)         '`USERNAME` environment variables)'
259)     ),
260) )
261) @click.argument('path', metavar='PATH', required=True)
262) @click.pass_context
263) def derivepassphrase_export_vault(
264)     ctx: click.Context,
265)     /,
266)     *,
267)     path: str | bytes | os.PathLike[str],
268)     formats: Sequence[Literal['v0.2', 'v0.3', 'storeroom']] = (),
269)     key: str | bytes | None = None,
270) ) -> None:
271)     """Export a vault-native configuration to standard output.
272) 
273)     Read the vault-native configuration at PATH, extract all information
274)     from it, and export the resulting configuration to standard output.
275)     Depending on the configuration format, PATH may either be a file or
276)     a directory.  Supports the vault "v0.2", "v0.3" and "storeroom"
277)     formats.
278) 
279)     If PATH is explicitly given as `VAULT_PATH`, then use the
280)     `VAULT_PATH` environment variable to determine the correct path.
281)     (Use `./VAULT_PATH` or similar to indicate a file/directory actually
282)     named `VAULT_PATH`.)
283) 
284)     """
285)     logging.basicConfig()
286)     if path in {'VAULT_PATH', b'VAULT_PATH'}:
287)         path = exporter.get_vault_path()
288)     if key is None:
289)         key = exporter.get_vault_key()
290)     elif isinstance(key, str):  # pragma: no branch
291)         key = key.encode('utf-8')
292)     for fmt in formats:
293)         try:
294)             config = _load_data(fmt, path, key)
295)         except (
296)             IsADirectoryError,
297)             NotADirectoryError,
298)             ValueError,
299)             RuntimeError,
300)         ):
301)             logging.info('Cannot load as %s: %s', fmt, path)
302)             continue
303)         except OSError as exc:
304)             click.echo(
305)                 (
306)                     f'{PROG_NAME}: ERROR: Cannot parse {path!r} as '
307)                     f'a valid config: {exc.strerror}: {exc.filename!r}'
308)                 ),
309)                 err=True,
310)             )
311)             ctx.exit(1)
312)         except ModuleNotFoundError:
313)             # TODO(the-13th-letter): Use backslash continuation.
314)             # https://github.com/nedbat/coveragepy/issues/1836
315)             msg = f"""
316) {PROG_NAME}: ERROR: Cannot load the required Python module "cryptography".
317) {PROG_NAME}: INFO: pip users: see the "export" extra.
318) """.lstrip('\n')
319)             click.echo(msg, nl=False, err=True)
320)             ctx.exit(1)
321)         else:
322)             if not _types.is_vault_config(config):
323)                 click.echo(
324)                     f'{PROG_NAME}: ERROR: Invalid vault config: {config!r}',
325)                     err=True,
326)                 )
327)                 ctx.exit(1)
328)             click.echo(json.dumps(config, indent=2, sort_keys=True))
329)             break
330)     else:
331)         click.echo(
332)             f'{PROG_NAME}: ERROR: Cannot parse {path!r} as a valid config.',
333)             err=True,
334)         )
335)         ctx.exit(1)
336) 
337) 
338) # Vault
339) # =====
340) 
341) 

342) def _config_filename(
343)     subsystem: str | None = 'settings',
344) ) -> str | bytes | pathlib.Path:
345)     """Return the filename of the configuration file for the subsystem.
346) 
347)     The (implicit default) file is currently named `settings.json`,
348)     located within the configuration directory as determined by the
349)     `DERIVEPASSPHRASE_PATH` environment variable, or by
350)     [`click.get_app_dir`][] in POSIX mode.  Depending on the requested
351)     subsystem, this will usually be a different file within that
352)     directory.

353) 

354)     Args:
355)         subsystem:
356)             Name of the configuration subsystem whose configuration
357)             filename to return.  If not given, return the old filename
358)             from before the subcommand migration.  If `None`, return the
359)             configuration directory instead.
360) 
361)     Raises:
362)         AssertionError:
363)             An unknown subsystem was passed.
364) 
365)     Deprecated:
366)         Since v0.2.0: The implicit default subsystem and the old
367)         configuration filename are deprecated, and will be removed in v1.0.
368)         The subsystem will be mandatory to specify.

369) 
370)     """
371)     path: str | bytes | pathlib.Path

372)     path = os.getenv(PROG_NAME.upper() + '_PATH') or click.get_app_dir(
373)         PROG_NAME, force_posix=True
374)     )

375)     # Use match/case here once Python 3.9 becomes unsupported.
376)     if subsystem is None:
377)         return path
378)     elif subsystem in {'vault', 'settings'}:  # noqa: RET505
379)         filename = f'{subsystem}.json'
380)     else:  # pragma: no cover
381)         msg = f'Unknown configuration subsystem: {subsystem!r}'
382)         raise AssertionError(msg)

383)     return os.path.join(path, filename)

384) 
385) 

386) def _load_config() -> _types.VaultConfig:

387)     """Load a vault(1)-compatible config from the application directory.
388) 

389)     The filename is obtained via [`_config_filename`][].  This must be
390)     an unencrypted JSON file.

391) 
392)     Returns:

393)         The vault settings.  See [`_types.VaultConfig`][] for details.

394) 
395)     Raises:
396)         OSError:
397)             There was an OS error accessing the file.
398)         ValueError:
399)             The data loaded from the file is not a vault(1)-compatible
400)             config.
401) 
402)     """

403)     filename = _config_filename(subsystem='vault')

404)     with open(filename, 'rb') as fileobj:
405)         data = json.load(fileobj)

406)     if not _types.is_vault_config(data):

407)         raise ValueError(_INVALID_VAULT_CONFIG)

408)     return data
409) 
410) 

411) def _migrate_and_load_old_config() -> (
412)     tuple[_types.VaultConfig, OSError | None]
413) ):
414)     """Load and migrate a vault(1)-compatible config.
415) 

416)     The (old) filename is obtained via [`_config_filename`][].  This
417)     must be an unencrypted JSON file.  After loading, the file is
418)     migrated to the new standard filename.

419) 
420)     Returns:
421)         The vault settings, and an optional exception encountered during

422)         migration.  See [`_types.VaultConfig`][] for details on the
423)         former.

424) 
425)     Raises:
426)         OSError:
427)             There was an OS error accessing the old file.
428)         ValueError:
429)             The data loaded from the file is not a vault(1)-compatible
430)             config.
431) 
432)     """
433)     new_filename = _config_filename(subsystem='vault')
434)     old_filename = _config_filename()
435)     with open(old_filename, 'rb') as fileobj:
436)         data = json.load(fileobj)
437)     if not _types.is_vault_config(data):
438)         raise ValueError(_INVALID_VAULT_CONFIG)
439)     try:
440)         os.replace(old_filename, new_filename)
441)     except OSError as exc:
442)         return data, exc
443)     else:
444)         return data, None
445) 
446) 

447) def _save_config(config: _types.VaultConfig, /) -> None:

448)     """Save a vault(1)-compatible config to the application directory.

449) 

450)     The filename is obtained via [`_config_filename`][].  The config
451)     will be stored as an unencrypted JSON file.

452) 
453)     Args:
454)         config:
455)             vault configuration to save.
456) 
457)     Raises:
458)         OSError:
459)             There was an OS error accessing or writing the file.
460)         ValueError:
461)             The data cannot be stored as a vault(1)-compatible config.
462) 
463)     """

464)     if not _types.is_vault_config(config):

465)         raise ValueError(_INVALID_VAULT_CONFIG)

466)     filename = _config_filename(subsystem='vault')

467)     filedir = os.path.dirname(os.path.abspath(filename))
468)     try:
469)         os.makedirs(filedir, exist_ok=False)
470)     except FileExistsError:
471)         if not os.path.isdir(filedir):

472)             raise  # noqa: DOC501

473)     with open(filename, 'w', encoding='UTF-8') as fileobj:

474)         json.dump(config, fileobj)
475) 
476) 

477) def _get_suitable_ssh_keys(

478)     conn: ssh_agent.SSHAgentClient | socket.socket | None = None, /

479) ) -> Iterator[_types.KeyCommentPair]:

480)     """Yield all SSH keys suitable for passphrase derivation.
481) 
482)     Suitable SSH keys are queried from the running SSH agent (see

483)     [`ssh_agent.SSHAgentClient.list_keys`][]).

484) 
485)     Args:
486)         conn:
487)             An optional connection hint to the SSH agent; specifically,
488)             an SSH agent client, or a socket connected to an SSH agent.
489) 
490)             If an existing SSH agent client, then this client will be
491)             queried for the SSH keys, and otherwise left intact.
492) 
493)             If a socket, then a one-shot client will be constructed
494)             based on the socket to query the agent, and deconstructed
495)             afterwards.
496) 
497)             If neither are given, then the agent's socket location is
498)             looked up in the `SSH_AUTH_SOCK` environment variable, and
499)             used to construct/deconstruct a one-shot client, as in the

500)             previous case.  This requires the [`socket.AF_UNIX`][]
501)             symbol to exist.

502) 
503)     Yields:

504)         Every SSH key from the SSH agent that is suitable for passphrase
505)         derivation.

506) 
507)     Raises:

508)         KeyError:
509)             `conn` was `None`, and the `SSH_AUTH_SOCK` environment
510)             variable was not found.

511)         NotImplementedError:
512)             `conn` was `None`, and this Python does not support
513)             [`socket.AF_UNIX`][], so the SSH agent client cannot be
514)             automatically set up.

515)         OSError:
516)             `conn` was a socket or `None`, and there was an error
517)             setting up a socket connection to the agent.

518)         LookupError:

519)             No keys usable for passphrase derivation are loaded into the
520)             SSH agent.

521)         RuntimeError:
522)             There was an error communicating with the SSH agent.

523)         ssh_agent.SSHAgentFailedError:

524)             The agent failed to supply a list of loaded keys.

525) 
526)     """

527)     client: ssh_agent.SSHAgentClient

528)     client_context: contextlib.AbstractContextManager[Any]

529)     # Use match/case here once Python 3.9 becomes unsupported.
530)     if isinstance(conn, ssh_agent.SSHAgentClient):
531)         client = conn
532)         client_context = contextlib.nullcontext()
533)     elif isinstance(conn, socket.socket) or conn is None:
534)         client = ssh_agent.SSHAgentClient(socket=conn)
535)         client_context = client
536)     else:  # pragma: no cover
537)         assert_never(conn)
538)         msg = f'invalid connection hint: {conn!r}'
539)         raise TypeError(msg)  # noqa: DOC501

540)     with client_context:
541)         try:
542)             all_key_comment_pairs = list(client.list_keys())
543)         except EOFError as e:  # pragma: no cover

544)             raise RuntimeError(_AGENT_COMMUNICATION_ERROR) from e
545)     suitable_keys = copy.copy(all_key_comment_pairs)

546)     for pair in all_key_comment_pairs:

547)         key, _comment = pair

548)         if vault.Vault._is_suitable_ssh_key(key):  # noqa: SLF001

549)             yield pair
550)     if not suitable_keys:  # pragma: no cover

551)         raise LookupError(_NO_USABLE_KEYS)

552) 
553) 
554) def _prompt_for_selection(

555)     items: Sequence[str | bytes],
556)     heading: str = 'Possible choices:',

557)     single_choice_prompt: str = 'Confirm this choice?',
558) ) -> int:
559)     """Prompt user for a choice among the given items.
560) 
561)     Print the heading, if any, then present the items to the user.  If
562)     there are multiple items, prompt the user for a selection, validate
563)     the choice, then return the list index of the selected item.  If
564)     there is only a single item, request confirmation for that item
565)     instead, and return the correct index.
566) 
567)     Args:

568)         items:
569)             The list of items to choose from.

570)         heading:
571)             A heading for the list of items, to print immediately
572)             before.  Defaults to a reasonable standard heading.  If
573)             explicitly empty, print no heading.
574)         single_choice_prompt:
575)             The confirmation prompt if there is only a single possible
576)             choice.  Defaults to a reasonable standard prompt.
577) 
578)     Returns:
579)         An index into the items sequence, indicating the user's
580)         selection.
581) 
582)     Raises:
583)         IndexError:
584)             The user made an invalid or empty selection, or requested an
585)             abort.
586) 
587)     """
588)     n = len(items)
589)     if heading:
590)         click.echo(click.style(heading, bold=True))
591)     for i, x in enumerate(items, start=1):
592)         click.echo(click.style(f'[{i}]', bold=True), nl=False)
593)         click.echo(' ', nl=False)
594)         click.echo(x)
595)     if n > 1:
596)         choices = click.Choice([''] + [str(i) for i in range(1, n + 1)])
597)         choice = click.prompt(
598)             f'Your selection? (1-{n}, leave empty to abort)',

599)             err=True,
600)             type=choices,
601)             show_choices=False,
602)             show_default=False,
603)             default='',
604)         )

605)         if not choice:

606)             raise IndexError(_EMPTY_SELECTION)

607)         return int(choice) - 1

608)     prompt_suffix = (
609)         ' ' if single_choice_prompt.endswith(tuple('?.!')) else ': '
610)     )

611)     try:

612)         click.confirm(
613)             single_choice_prompt,
614)             prompt_suffix=prompt_suffix,
615)             err=True,
616)             abort=True,
617)             default=False,
618)             show_default=False,
619)         )

620)     except click.Abort:
621)         raise IndexError(_EMPTY_SELECTION) from None
622)     return 0

623) 
624) 
625) def _select_ssh_key(

626)     conn: ssh_agent.SSHAgentClient | socket.socket | None = None, /

627) ) -> bytes | bytearray:
628)     """Interactively select an SSH key for passphrase derivation.
629) 
630)     Suitable SSH keys are queried from the running SSH agent (see

631)     [`ssh_agent.SSHAgentClient.list_keys`][]), then the user is prompted
632)     interactively (see [`click.prompt`][]) for a selection.

633) 
634)     Args:
635)         conn:
636)             An optional connection hint to the SSH agent; specifically,
637)             an SSH agent client, or a socket connected to an SSH agent.
638) 
639)             If an existing SSH agent client, then this client will be
640)             queried for the SSH keys, and otherwise left intact.
641) 
642)             If a socket, then a one-shot client will be constructed
643)             based on the socket to query the agent, and deconstructed
644)             afterwards.
645) 
646)             If neither are given, then the agent's socket location is
647)             looked up in the `SSH_AUTH_SOCK` environment variable, and
648)             used to construct/deconstruct a one-shot client, as in the

649)             previous case.  This requires the [`socket.AF_UNIX`][]
650)             symbol to exist.

651) 
652)     Returns:
653)         The selected SSH key.
654) 
655)     Raises:

656)         KeyError:
657)             `conn` was `None`, and the `SSH_AUTH_SOCK` environment
658)             variable was not found.

659)         NotImplementedError:
660)             `conn` was `None`, and this Python does not support
661)             [`socket.AF_UNIX`][], so the SSH agent client cannot be
662)             automatically set up.

663)         OSError:
664)             `conn` was a socket or `None`, and there was an error
665)             setting up a socket connection to the agent.

666)         IndexError:
667)             The user made an invalid or empty selection, or requested an
668)             abort.

669)         LookupError:

670)             No keys usable for passphrase derivation are loaded into the
671)             SSH agent.

672)         RuntimeError:
673)             There was an error communicating with the SSH agent.

674)         SSHAgentFailedError:
675)             The agent failed to supply a list of loaded keys.

676)     """
677)     suitable_keys = list(_get_suitable_ssh_keys(conn))
678)     key_listing: list[str] = []

679)     unstring_prefix = ssh_agent.SSHAgentClient.unstring_prefix

680)     for key, comment in suitable_keys:
681)         keytype = unstring_prefix(key)[0].decode('ASCII')
682)         key_str = base64.standard_b64encode(key).decode('ASCII')

683)         key_prefix = (
684)             key_str
685)             if len(key_str) < KEY_DISPLAY_LENGTH + len('...')
686)             else key_str[:KEY_DISPLAY_LENGTH] + '...'
687)         )

688)         comment_str = comment.decode('UTF-8', errors='replace')
689)         key_listing.append(f'{keytype} {key_prefix} {comment_str}')
690)     choice = _prompt_for_selection(

691)         key_listing,
692)         heading='Suitable SSH keys:',
693)         single_choice_prompt='Use this key?',
694)     )

695)     return suitable_keys[choice].key
696) 
697) 
698) def _prompt_for_passphrase() -> str:
699)     """Interactively prompt for the passphrase.
700) 
701)     Calls [`click.prompt`][] internally.  Moved into a separate function
702)     mainly for testing/mocking purposes.
703) 
704)     Returns:
705)         The user input.
706) 
707)     """

708)     return cast(
709)         str,
710)         click.prompt(
711)             'Passphrase',
712)             default='',
713)             hide_input=True,
714)             show_default=False,
715)             err=True,
716)         ),

717)     )

718) 
719) 

720) class _ORIGIN(enum.Enum):
721)     INTERACTIVE: str = 'interactive'
722) 
723) 

724) def _check_for_misleading_passphrase(

725)     key: tuple[str, ...] | _ORIGIN,

726)     value: dict[str, Any],
727)     *,
728)     form: Literal['NFC', 'NFD', 'NFKC', 'NFKD'] = 'NFC',
729) ) -> None:
730)     if 'phrase' in value:
731)         phrase = value['phrase']
732)         if not unicodedata.is_normalized(form, phrase):

733)             formatted_key = (
734)                 key.value
735)                 if isinstance(key, _ORIGIN)
736)                 else _types.json_path(key)

737)             )
738)             click.echo(
739)                 (

740)                     f'{PROG_NAME}: Warning: the {formatted_key} '
741)                     f'passphrase is not {form}-normalized. Make sure to '
742)                     f'double-check this is really the passphrase you want.'

743)                 ),
744)                 err=True,
745)             )
746) 
747) 

748) class OptionGroupOption(click.Option):

749)     """A [`click.Option`][] with an associated group name and group epilog.
750) 

751)     Used by [`CommandWithHelpGroups`][] to print help sections.  Each
752)     subclass contains its own group name and epilog.

753) 
754)     Attributes:
755)         option_group_name:
756)             The name of the option group.  Used as a heading on the help
757)             text for options in this section.
758)         epilog:
759)             An epilog to print after listing the options in this
760)             section.
761) 
762)     """

763) 

764)     option_group_name: str = ''

765)     """"""

766)     epilog: str = ''

767)     """"""

768) 

769)     def __init__(self, *args: Any, **kwargs: Any) -> None:  # noqa: ANN401

770)         if self.__class__ == __class__:  # type: ignore[name-defined]

771)             raise NotImplementedError
772)         super().__init__(*args, **kwargs)

773) 

774) 
775) class CommandWithHelpGroups(click.Command):

776)     """A [`click.Command`][] with support for help/option groups.
777) 
778)     Inspired by [a comment on `pallets/click#373`][CLICK_ISSUE], and
779)     further modified to support group epilogs.
780) 
781)     [CLICK_ISSUE]: https://github.com/pallets/click/issues/373#issuecomment-515293746
782) 
783)     """
784) 

785)     def format_options(

786)         self,
787)         ctx: click.Context,
788)         formatter: click.HelpFormatter,

789)     ) -> None:

790)         r"""Format options on the help listing, grouped into sections.
791) 

792)         This is a callback for [`click.Command.get_help`][] that
793)         implements the `--help` listing, by calling appropriate methods
794)         of the `formatter`.  We list all options (like the base
795)         implementation), but grouped into sections according to the
796)         concrete [`click.Option`][] subclass being used.  If the option

797)         is an instance of some subclass of [`OptionGroupOption`][], then
798)         the section heading and the epilog are taken from the
799)         [`option_group_name`] [OptionGroupOption.option_group_name] and
800)         [`epilog`] [OptionGroupOption.epilog] attributes; otherwise, the
801)         section heading is "Options" (or "Other options" if there are
802)         other option groups) and the epilog is empty.

803) 
804)         Args:
805)             ctx:
806)                 The click context.
807)             formatter:
808)                 The formatter for the `--help` listing.
809) 
810)         """

811)         help_records: dict[str, list[tuple[str, str]]] = {}
812)         epilogs: dict[str, str] = {}
813)         params = self.params[:]

814)         if (  # pragma: no branch
815)             (help_opt := self.get_help_option(ctx)) is not None
816)             and help_opt not in params
817)         ):

818)             params.append(help_opt)
819)         for param in params:
820)             rec = param.get_help_record(ctx)
821)             if rec is not None:
822)                 if isinstance(param, OptionGroupOption):
823)                     group_name = param.option_group_name
824)                     epilogs.setdefault(group_name, param.epilog)
825)                 else:
826)                     group_name = ''
827)                 help_records.setdefault(group_name, []).append(rec)
828)         default_group = help_records.pop('')

829)         default_group_name = (
830)             'Other Options' if len(default_group) > 1 else 'Options'
831)         )

832)         help_records[default_group_name] = default_group
833)         for group_name, records in help_records.items():
834)             with formatter.section(group_name):
835)                 formatter.write_dl(records)
836)             epilog = inspect.cleandoc(epilogs.get(group_name, ''))
837)             if epilog:
838)                 formatter.write_paragraph()
839)                 with formatter.indentation():
840)                     formatter.write_text(epilog)
841) 

842) 

843) # Concrete option groups used by this command-line interface.
844) class PasswordGenerationOption(OptionGroupOption):

845)     """Password generation options for the CLI."""

846) 

847)     option_group_name = 'Password generation'

848)     epilog = """

849)         Use NUMBER=0, e.g. "--symbol 0", to exclude a character type
850)         from the output.

851)     """

852) 

853) 
854) class ConfigurationOption(OptionGroupOption):

855)     """Configuration options for the CLI."""

856) 

857)     option_group_name = 'Configuration'

858)     epilog = """

859)         Use $VISUAL or $EDITOR to configure the spawned editor.

860)     """

861) 

862) 
863) class StorageManagementOption(OptionGroupOption):

864)     """Storage management options for the CLI."""

865) 

866)     option_group_name = 'Storage management'

867)     epilog = """

868)         Using "-" as PATH for standard input/standard output is
869)         supported.

870)     """
871) 

872) 

873) def _validate_occurrence_constraint(

874)     ctx: click.Context,
875)     param: click.Parameter,

876)     value: Any,  # noqa: ANN401

877) ) -> int | None:

878)     """Check that the occurrence constraint is valid (int, 0 or larger).
879) 
880)     Args:
881)         ctx: The `click` context.
882)         param: The current command-line parameter.
883)         value: The parameter value to be checked.
884) 
885)     Returns:
886)         The parsed parameter value.
887) 
888)     Raises:
889)         click.BadParameter: The parameter value is invalid.
890) 
891)     """

892)     del ctx  # Unused.

893)     del param  # Unused.

894)     if value is None:
895)         return value
896)     if isinstance(value, int):
897)         int_value = value
898)     else:
899)         try:
900)             int_value = int(value, 10)
901)         except ValueError as e:

902)             msg = 'not an integer'
903)             raise click.BadParameter(msg) from e

904)     if int_value < 0:

905)         msg = 'not a non-negative integer'
906)         raise click.BadParameter(msg)

907)     return int_value
908) 

909) 
910) def _validate_length(

911)     ctx: click.Context,
912)     param: click.Parameter,

913)     value: Any,  # noqa: ANN401

914) ) -> int | None:

915)     """Check that the length is valid (int, 1 or larger).
916) 
917)     Args:
918)         ctx: The `click` context.
919)         param: The current command-line parameter.
920)         value: The parameter value to be checked.
921) 
922)     Returns:
923)         The parsed parameter value.
924) 
925)     Raises:
926)         click.BadParameter: The parameter value is invalid.
927) 
928)     """

929)     del ctx  # Unused.

930)     del param  # Unused.

931)     if value is None:
932)         return value
933)     if isinstance(value, int):
934)         int_value = value
935)     else:
936)         try:
937)             int_value = int(value, 10)
938)         except ValueError as e:

939)             msg = 'not an integer'
940)             raise click.BadParameter(msg) from e

941)     if int_value < 1:

942)         msg = 'not a positive integer'
943)         raise click.BadParameter(msg)

944)     return int_value
945) 

946) 
947) DEFAULT_NOTES_TEMPLATE = """\

948) # Enter notes below the line with the cut mark (ASCII scissors and
949) # dashes).  Lines above the cut mark (such as this one) will be ignored.
950) #
951) # If you wish to clear the notes, leave everything beyond the cut mark
952) # blank.  However, if you leave the *entire* file blank, also removing
953) # the cut mark, then the edit is aborted, and the old notes contents are
954) # retained.
955) #
956) # - - - - - >8 - - - - - >8 - - - - - >8 - - - - - >8 - - - - -

957) """

958) DEFAULT_NOTES_MARKER = '# - - - - - >8 - - - - -'
959) 
960) 

961) @click.command(

962)     # 'vault',
963)     # help="derivation scheme compatible with James Coglan's vault(1)",

964)     context_settings={'help_option_names': ['-h', '--help']},

965)     cls=CommandWithHelpGroups,

966)     epilog=r"""

967)         WARNING: There is NO WAY to retrieve the generated passphrases
968)         if the master passphrase, the SSH key, or the exact passphrase
969)         settings are lost, short of trying out all possible
970)         combinations.  You are STRONGLY advised to keep independent
971)         backups of the settings and the SSH key, if any.

972) 
973)         The configuration is NOT encrypted, and you are STRONGLY
974)         discouraged from using a stored passphrase.

975)     """,
976) )
977) @click.option(
978)     '-p',
979)     '--phrase',
980)     'use_phrase',
981)     is_flag=True,
982)     help='prompts you for your passphrase',
983)     cls=PasswordGenerationOption,
984) )
985) @click.option(
986)     '-k',
987)     '--key',
988)     'use_key',
989)     is_flag=True,
990)     help='uses your SSH private key to generate passwords',
991)     cls=PasswordGenerationOption,
992) )
993) @click.option(
994)     '-l',
995)     '--length',
996)     metavar='NUMBER',
997)     callback=_validate_length,
998)     help='emits password of length NUMBER',
999)     cls=PasswordGenerationOption,
1000) )
1001) @click.option(
1002)     '-r',
1003)     '--repeat',
1004)     metavar='NUMBER',
1005)     callback=_validate_occurrence_constraint,
1006)     help='allows maximum of NUMBER repeated adjacent chars',
1007)     cls=PasswordGenerationOption,
1008) )
1009) @click.option(
1010)     '--lower',
1011)     metavar='NUMBER',
1012)     callback=_validate_occurrence_constraint,
1013)     help='includes at least NUMBER lowercase letters',
1014)     cls=PasswordGenerationOption,
1015) )
1016) @click.option(
1017)     '--upper',
1018)     metavar='NUMBER',
1019)     callback=_validate_occurrence_constraint,
1020)     help='includes at least NUMBER uppercase letters',
1021)     cls=PasswordGenerationOption,
1022) )
1023) @click.option(
1024)     '--number',
1025)     metavar='NUMBER',
1026)     callback=_validate_occurrence_constraint,
1027)     help='includes at least NUMBER digits',
1028)     cls=PasswordGenerationOption,
1029) )
1030) @click.option(
1031)     '--space',
1032)     metavar='NUMBER',
1033)     callback=_validate_occurrence_constraint,
1034)     help='includes at least NUMBER spaces',
1035)     cls=PasswordGenerationOption,
1036) )
1037) @click.option(
1038)     '--dash',
1039)     metavar='NUMBER',
1040)     callback=_validate_occurrence_constraint,
1041)     help='includes at least NUMBER "-" or "_"',
1042)     cls=PasswordGenerationOption,
1043) )
1044) @click.option(
1045)     '--symbol',
1046)     metavar='NUMBER',
1047)     callback=_validate_occurrence_constraint,
1048)     help='includes at least NUMBER symbol chars',
1049)     cls=PasswordGenerationOption,
1050) )
1051) @click.option(
1052)     '-n',
1053)     '--notes',
1054)     'edit_notes',
1055)     is_flag=True,
1056)     help='spawn an editor to edit notes for SERVICE',
1057)     cls=ConfigurationOption,
1058) )
1059) @click.option(
1060)     '-c',
1061)     '--config',
1062)     'store_config_only',
1063)     is_flag=True,
1064)     help='saves the given settings for SERVICE or global',
1065)     cls=ConfigurationOption,
1066) )
1067) @click.option(
1068)     '-x',
1069)     '--delete',
1070)     'delete_service_settings',
1071)     is_flag=True,
1072)     help='deletes settings for SERVICE',
1073)     cls=ConfigurationOption,
1074) )
1075) @click.option(
1076)     '--delete-globals',
1077)     is_flag=True,
1078)     help='deletes the global shared settings',
1079)     cls=ConfigurationOption,
1080) )
1081) @click.option(
1082)     '-X',
1083)     '--clear',
1084)     'clear_all_settings',
1085)     is_flag=True,
1086)     help='deletes all settings',
1087)     cls=ConfigurationOption,
1088) )
1089) @click.option(
1090)     '-e',
1091)     '--export',
1092)     'export_settings',
1093)     metavar='PATH',
1094)     help='export all saved settings into file PATH',
1095)     cls=StorageManagementOption,
1096) )
1097) @click.option(
1098)     '-i',
1099)     '--import',
1100)     'import_settings',
1101)     metavar='PATH',
1102)     help='import saved settings from file PATH',
1103)     cls=StorageManagementOption,

1104) )

1105) @click.version_option(version=dpp.__version__, prog_name=PROG_NAME)

1106) @click.argument('service', required=False)
1107) @click.pass_context

1108) def derivepassphrase_vault(  # noqa: C901,PLR0912,PLR0913,PLR0914,PLR0915

1109)     ctx: click.Context,
1110)     /,
1111)     *,

1112)     service: str | None = None,
1113)     use_phrase: bool = False,
1114)     use_key: bool = False,
1115)     length: int | None = None,
1116)     repeat: int | None = None,
1117)     lower: int | None = None,
1118)     upper: int | None = None,
1119)     number: int | None = None,
1120)     space: int | None = None,
1121)     dash: int | None = None,
1122)     symbol: int | None = None,
1123)     edit_notes: bool = False,
1124)     store_config_only: bool = False,
1125)     delete_service_settings: bool = False,
1126)     delete_globals: bool = False,
1127)     clear_all_settings: bool = False,
1128)     export_settings: TextIO | pathlib.Path | os.PathLike[str] | None = None,
1129)     import_settings: TextIO | pathlib.Path | os.PathLike[str] | None = None,

1130) ) -> None:

1131)     """Derive a passphrase using the vault(1) derivation scheme.

1132) 

1133)     Using a master passphrase or a master SSH key, derive a passphrase
1134)     for SERVICE, subject to length, character and character repetition
1135)     constraints.  The derivation is cryptographically strong, meaning
1136)     that even if a single passphrase is compromised, guessing the master
1137)     passphrase or a different service's passphrase is computationally
1138)     infeasible.  The derivation is also deterministic, given the same
1139)     inputs, thus the resulting passphrase need not be stored explicitly.
1140)     The service name and constraints themselves also need not be kept
1141)     secret; the latter are usually stored in a world-readable file.

1142) 
1143)     If operating on global settings, or importing/exporting settings,
1144)     then SERVICE must be omitted.  Otherwise it is required.\f
1145) 
1146)     This is a [`click`][CLICK]-powered command-line interface function,
1147)     and not intended for programmatic use.  Call with arguments

1148)     `['--help']` to see full documentation of the interface.  (See also
1149)     [`click.testing.CliRunner`][] for controlled, programmatic
1150)     invocation.)

1151) 

1152)     [CLICK]: https://pypi.org/package/click/

1153) 
1154)     Parameters:
1155)         ctx (click.Context):
1156)             The `click` context.
1157) 
1158)     Other Parameters:

1159)         service:

1160)             A service name.  Required, unless operating on global
1161)             settings or importing/exporting settings.

1162)         use_phrase:

1163)             Command-line argument `-p`/`--phrase`.  If given, query the
1164)             user for a passphrase instead of an SSH key.

1165)         use_key:

1166)             Command-line argument `-k`/`--key`.  If given, query the
1167)             user for an SSH key instead of a passphrase.

1168)         length:

1169)             Command-line argument `-l`/`--length`.  Override the default
1170)             length of the generated passphrase.

1171)         repeat:

1172)             Command-line argument `-r`/`--repeat`.  Override the default
1173)             repetition limit if positive, or disable the repetition
1174)             limit if 0.

1175)         lower:

1176)             Command-line argument `--lower`.  Require a given amount of
1177)             ASCII lowercase characters if positive, else forbid ASCII
1178)             lowercase characters if 0.

1179)         upper:

1180)             Command-line argument `--upper`.  Same as `lower`, but for
1181)             ASCII uppercase characters.

1182)         number:

1183)             Command-line argument `--number`.  Same as `lower`, but for
1184)             ASCII digits.

1185)         space:

1186)             Command-line argument `--space`.  Same as `lower`, but for

1187)             the space character.

1188)         dash:

1189)             Command-line argument `--dash`.  Same as `lower`, but for

1190)             the hyphen-minus and underscore characters.

1191)         symbol:

1192)             Command-line argument `--symbol`.  Same as `lower`, but for

1193)             all other ASCII printable characters (except backquote).

1194)         edit_notes:

1195)             Command-line argument `-n`/`--notes`.  If given, spawn an
1196)             editor to edit notes for `service`.

1197)         store_config_only:

1198)             Command-line argument `-c`/`--config`.  If given, saves the
1199)             other given settings (`--key`, ..., `--symbol`) to the
1200)             configuration file, either specifically for `service` or as
1201)             global settings.

1202)         delete_service_settings:

1203)             Command-line argument `-x`/`--delete`.  If given, removes
1204)             the settings for `service` from the configuration file.

1205)         delete_globals:

1206)             Command-line argument `--delete-globals`.  If given, removes
1207)             the global settings from the configuration file.

1208)         clear_all_settings:

1209)             Command-line argument `-X`/`--clear`.  If given, removes all
1210)             settings from the configuration file.

1211)         export_settings:
1212)             Command-line argument `-e`/`--export`.  If a file object,
1213)             then it must be open for writing and accept `str` inputs.
1214)             Otherwise, a filename to open for writing.  Using `-` for
1215)             standard output is supported.
1216)         import_settings:
1217)             Command-line argument `-i`/`--import`.  If a file object, it
1218)             must be open for reading and yield `str` values.  Otherwise,
1219)             a filename to open for reading.  Using `-` for standard
1220)             input is supported.

1221) 

1222)     """  # noqa: D301

1223)     options_in_group: dict[type[click.Option], list[click.Option]] = {}
1224)     params_by_str: dict[str, click.Parameter] = {}

1225)     for param in ctx.command.params:
1226)         if isinstance(param, click.Option):
1227)             group: type[click.Option]

1228)             # Use match/case here once Python 3.9 becomes unsupported.
1229)             if isinstance(param, PasswordGenerationOption):
1230)                 group = PasswordGenerationOption
1231)             elif isinstance(param, ConfigurationOption):
1232)                 group = ConfigurationOption
1233)             elif isinstance(param, StorageManagementOption):
1234)                 group = StorageManagementOption
1235)             elif isinstance(param, OptionGroupOption):
1236)                 raise AssertionError(  # noqa: DOC501,TRY003,TRY004
1237)                     f'Unknown option group for {param!r}'  # noqa: EM102
1238)                 )
1239)             else:
1240)                 group = click.Option

1241)             options_in_group.setdefault(group, []).append(param)
1242)         params_by_str[param.human_readable_name] = param
1243)         for name in param.opts + param.secondary_opts:
1244)             params_by_str[name] = param
1245) 

1246)     def is_param_set(param: click.Parameter) -> bool:

1247)         return bool(ctx.params.get(param.human_readable_name))
1248) 

1249)     def check_incompatible_options(

1250)         param: click.Parameter | str,
1251)         *incompatible: click.Parameter | str,

1252)     ) -> None:

1253)         if isinstance(param, str):
1254)             param = params_by_str[param]
1255)         assert isinstance(param, click.Parameter)
1256)         if not is_param_set(param):

1257)             return
1258)         for other in incompatible:

1259)             if isinstance(other, str):

1260)                 other = params_by_str[other]  # noqa: PLW2901

1261)             assert isinstance(other, click.Parameter)
1262)             if other != param and is_param_set(other):
1263)                 opt_str = param.opts[0]
1264)                 other_str = other.opts[0]
1265)                 raise click.BadOptionUsage(

1266)                     opt_str, f'mutually exclusive with {other_str}', ctx=ctx
1267)                 )

1268) 

1269)     def err(msg: str) -> NoReturn:
1270)         click.echo(f'{PROG_NAME}: {msg}', err=True)
1271)         ctx.exit(1)
1272) 

1273)     def get_config() -> _types.VaultConfig:

1274)         try:
1275)             return _load_config()
1276)         except FileNotFoundError:

1277)             try:
1278)                 backup_config, exc = _migrate_and_load_old_config()
1279)             except FileNotFoundError:
1280)                 return {'services': {}}
1281)             old_name = os.path.basename(_config_filename())
1282)             new_name = os.path.basename(_config_filename(subsystem='vault'))
1283)             click.echo(
1284)                 (
1285)                     f'{PROG_NAME}: Using deprecated v0.1-style config file '
1286)                     f'{old_name!r}, instead of v0.2-style {new_name!r}.  '
1287)                     f'Support for v0.1-style config filenames will be '
1288)                     f'removed in v1.0.'
1289)                 ),
1290)                 err=True,
1291)             )
1292)             if isinstance(exc, OSError):
1293)                 click.echo(
1294)                     (
1295)                         f'{PROG_NAME}: Warning: Failed to migrate to '
1296)                         f'{new_name!r}: {exc.strerror}: {exc.filename!r}'
1297)                     ),
1298)                     err=True,
1299)                 )
1300)             else:
1301)                 click.echo(
1302)                     f'{PROG_NAME}: Successfully migrated to {new_name!r}.',
1303)                     err=True,
1304)                 )
1305)             return backup_config

1306)         except OSError as e:
1307)             err(f'Cannot load config: {e.strerror}: {e.filename!r}')

1308)         except Exception as e:  # noqa: BLE001

1309)             err(f'Cannot load config: {e}')
1310) 
1311)     def put_config(config: _types.VaultConfig, /) -> None:
1312)         try:
1313)             _save_config(config)

1314)         except OSError as exc:
1315)             err(f'Cannot store config: {exc.strerror}: {exc.filename!r}')

1316)         except Exception as exc:  # noqa: BLE001
1317)             err(f'Cannot store config: {exc}')

1318) 

1319)     configuration: _types.VaultConfig

1320) 
1321)     check_incompatible_options('--phrase', '--key')

1322)     for group in (ConfigurationOption, StorageManagementOption):

1323)         for opt in options_in_group[group]:
1324)             if opt != params_by_str['--config']:
1325)                 check_incompatible_options(

1326)                     opt, *options_in_group[PasswordGenerationOption]
1327)                 )

1328) 

1329)     for group in (ConfigurationOption, StorageManagementOption):

1330)         for opt in options_in_group[group]:
1331)             check_incompatible_options(

1332)                 opt,
1333)                 *options_in_group[ConfigurationOption],
1334)                 *options_in_group[StorageManagementOption],
1335)             )

1336)     sv_or_global_options = options_in_group[PasswordGenerationOption]
1337)     for param in sv_or_global_options:

1338)         if is_param_set(param) and not (
1339)             service or is_param_set(params_by_str['--config'])

1340)         ):
1341)             opt_str = param.opts[0]

1342)             msg = f'{opt_str} requires a SERVICE or --config'

1343)             raise click.UsageError(msg)  # noqa: DOC501
1344)     sv_options = [params_by_str['--notes'], params_by_str['--delete']]
1345)     for param in sv_options:
1346)         if is_param_set(param) and not service:
1347)             opt_str = param.opts[0]
1348)             msg = f'{opt_str} requires a SERVICE'

1349)             raise click.UsageError(msg)

1350)     no_sv_options = [
1351)         params_by_str['--delete-globals'],
1352)         params_by_str['--clear'],
1353)         *options_in_group[StorageManagementOption],
1354)     ]

1355)     for param in no_sv_options:
1356)         if is_param_set(param) and service:
1357)             opt_str = param.opts[0]

1358)             msg = f'{opt_str} does not take a SERVICE argument'
1359)             raise click.UsageError(msg)

1360) 
1361)     if edit_notes:
1362)         assert service is not None
1363)         configuration = get_config()

1364)         text = DEFAULT_NOTES_TEMPLATE + configuration['services'].get(

1365)             service, cast(_types.VaultConfigServicesSettings, {})

1366)         ).get('notes', '')

1367)         notes_value = click.edit(text=text)
1368)         if notes_value is not None:

1369)             notes_lines = collections.deque(notes_value.splitlines(True))  # noqa: FBT003

1370)             while notes_lines:
1371)                 line = notes_lines.popleft()
1372)                 if line.startswith(DEFAULT_NOTES_MARKER):
1373)                     notes_value = ''.join(notes_lines)
1374)                     break
1375)             else:
1376)                 if not notes_value.strip():

1377)                     err('Not saving new notes: user aborted request')

1378)             configuration['services'].setdefault(service, {})['notes'] = (

1379)                 notes_value.strip('\n')
1380)             )

1381)             put_config(configuration)

1382)     elif delete_service_settings:
1383)         assert service is not None
1384)         configuration = get_config()
1385)         if service in configuration['services']:
1386)             del configuration['services'][service]

1387)             put_config(configuration)

1388)     elif delete_globals:
1389)         configuration = get_config()
1390)         if 'global' in configuration:
1391)             del configuration['global']

1392)             put_config(configuration)

1393)     elif clear_all_settings:

1394)         put_config({'services': {}})

1395)     elif import_settings:
1396)         try:

1397)             # TODO(the-13th-letter): keep track of auto-close; try
1398)             # os.dup if feasible

1399)             infile = (
1400)                 cast(TextIO, import_settings)
1401)                 if hasattr(import_settings, 'close')
1402)                 else click.open_file(os.fspath(import_settings), 'rt')
1403)             )

1404)             with infile:
1405)                 maybe_config = json.load(infile)
1406)         except json.JSONDecodeError as e:

1407)             err(f'Cannot load config: cannot decode JSON: {e}')

1408)         except OSError as e:

1409)             err(f'Cannot load config: {e.strerror}: {e.filename!r}')

1410)         cleaned = _types.clean_up_falsy_vault_config_values(maybe_config)
1411)         if not _types.is_vault_config(maybe_config):
1412)             err(f'Cannot load config: {_INVALID_VAULT_CONFIG}')
1413)         assert cleaned is not None
1414)         for step in cleaned:
1415)             # These are never fatal errors, because the semantics of
1416)             # vault upon encountering these settings are ill-specified,
1417)             # but not ill-defined.
1418)             if step.action == 'replace':
1419)                 err_msg = (
1420)                     f'{PROG_NAME}: Warning: Replacing invalid value '
1421)                     f'{json.dumps(step.old_value)} for key '
1422)                     f'{_types.json_path(step.path)} with '
1423)                     f'{json.dumps(step.new_value)}.'
1424)                 )
1425)             else:
1426)                 err_msg = (
1427)                     f'{PROG_NAME}: Warning: Removing ineffective setting '
1428)                     f'{_types.json_path(step.path)} = '
1429)                     f'{json.dumps(step.old_value)}.'
1430)                 )
1431)             click.echo(err_msg, err=True)
1432)         form = cast(
1433)             Literal['NFC', 'NFD', 'NFKC', 'NFKD'],
1434)             maybe_config.get('global', {}).get(
1435)                 'unicode_normalization_form', 'NFC'
1436)             ),
1437)         )
1438)         assert form in {'NFC', 'NFD', 'NFKC', 'NFKD'}
1439)         _check_for_misleading_passphrase(
1440)             ('global',),
1441)             cast(dict[str, Any], maybe_config.get('global', {})),
1442)             form=form,
1443)         )
1444)         for key, value in maybe_config['services'].items():

1445)             _check_for_misleading_passphrase(

1446)                 ('services', key),
1447)                 cast(dict[str, Any], value),

1448)                 form=form,
1449)             )

1450)         configuration = get_config()
1451)         merged_config: collections.ChainMap[str, Any] = collections.ChainMap(
1452)             {
1453)                 'services': collections.ChainMap(
1454)                     maybe_config['services'],
1455)                     configuration['services'],
1456)                 ),
1457)             },
1458)             {'global': maybe_config['global']}
1459)             if 'global' in maybe_config
1460)             else {},
1461)             {'global': configuration['global']}
1462)             if 'global' in configuration
1463)             else {},
1464)         )
1465)         new_config = {
1466)             k: dict(v) if isinstance(v, collections.ChainMap) else v
1467)             for k, v in sorted(merged_config.items())
1468)         }
1469)         assert _types.is_vault_config(new_config)
1470)         put_config(new_config)

1471)     elif export_settings:
1472)         configuration = get_config()
1473)         try:

1474)             # TODO(the-13th-letter): keep track of auto-close; try
1475)             # os.dup if feasible

1476)             outfile = (
1477)                 cast(TextIO, export_settings)
1478)                 if hasattr(export_settings, 'close')
1479)                 else click.open_file(os.fspath(export_settings), 'wt')
1480)             )

1481)             with outfile:
1482)                 json.dump(configuration, outfile)
1483)         except OSError as e:

1484)             err(f'Cannot store config: {e.strerror}: {e.filename!r}')

1485)     else:
1486)         configuration = get_config()
1487)         # This block could be type checked more stringently, but this
1488)         # would probably involve a lot of code repetition.  Since we
1489)         # have a type guarding function anyway, assert that we didn't
1490)         # make any mistakes at the end instead.
1491)         global_keys = {'key', 'phrase'}

1492)         service_keys = {
1493)             'key',
1494)             'phrase',
1495)             'length',
1496)             'repeat',
1497)             'lower',
1498)             'upper',
1499)             'number',
1500)             'space',
1501)             'dash',
1502)             'symbol',
1503)         }

1504)         settings: collections.ChainMap[str, Any] = collections.ChainMap(

1505)             {
1506)                 k: v
1507)                 for k, v in locals().items()
1508)                 if k in service_keys and v is not None
1509)             },
1510)             cast(
1511)                 dict[str, Any],
1512)                 configuration['services'].get(service or '', {}),
1513)             ),
1514)             cast(dict[str, Any], configuration.get('global', {})),

1515)         )
1516)         if use_key:
1517)             try:

1518)                 key = base64.standard_b64encode(_select_ssh_key()).decode(
1519)                     'ASCII'
1520)                 )

1521)             except IndexError:

1522)                 err('No valid SSH key selected')

1523)             except KeyError:

1524)                 err('Cannot find running SSH agent; check SSH_AUTH_SOCK')

1525)             except NotImplementedError:
1526)                 err(
1527)                     'Cannot connect to SSH agent because '
1528)                     'this Python version does not support UNIX domain sockets'
1529)                 )

1530)             except OSError as e:
1531)                 err(
1532)                     f'Cannot connect to SSH agent: {e.strerror}: '
1533)                     f'{e.filename!r}'
1534)                 )

1535)             except (
1536)                 LookupError,
1537)                 RuntimeError,
1538)                 ssh_agent.SSHAgentFailedError,
1539)             ) as e:

1540)                 err(str(e))

1541)         elif use_phrase:
1542)             maybe_phrase = _prompt_for_passphrase()
1543)             if not maybe_phrase:

1544)                 err('No passphrase given')

1545)             else:
1546)                 phrase = maybe_phrase
1547)         if store_config_only:
1548)             view: collections.ChainMap[str, Any]

1549)             view = (
1550)                 collections.ChainMap(*settings.maps[:2])
1551)                 if service

1552)                 else collections.ChainMap(settings.maps[0], settings.maps[2])

1553)             )

1554)             if use_key:
1555)                 view['key'] = key
1556)             elif use_phrase:

1557)                 view['phrase'] = phrase
1558)                 settings_type = 'service' if service else 'global'

1559)                 _check_for_misleading_passphrase(
1560)                     ('services', service) if service else ('global',),
1561)                     {'phrase': phrase},
1562)                 )

1563)                 if 'key' in settings:
1564)                     err_msg = (
1565)                         f'{PROG_NAME}: Warning: Setting a {settings_type} '
1566)                         f'passphrase is ineffective because a key is also '
1567)                         f'set.'
1568)                     )
1569)                     click.echo(err_msg, err=True)

1570)             if not view.maps[0]:
1571)                 settings_type = 'service' if service else 'global'

1572)                 msg = (

1573)                     f'Cannot update {settings_type} settings without '

1574)                     f'actual settings'
1575)                 )

1576)                 raise click.UsageError(msg)

1577)             if service:

1578)                 configuration['services'].setdefault(service, {}).update(view)  # type: ignore[typeddict-item]

1579)             else:

1580)                 configuration.setdefault('global', {}).update(view)  # type: ignore[typeddict-item]

1581)             assert _types.is_vault_config(

1582)                 configuration

1583)             ), f'Invalid vault configuration: {configuration!r}'

1584)             put_config(configuration)

1585)         else:
1586)             if not service:

1587)                 msg = 'SERVICE is required'
1588)                 raise click.UsageError(msg)

1589)             kwargs: dict[str, Any] = {
1590)                 k: v
1591)                 for k, v in settings.items()
1592)                 if k in service_keys and v is not None
1593)             }
1594) 

1595)             def key_to_phrase(
1596)                 key: str | bytes | bytearray,
1597)             ) -> bytes | bytearray:

1598)                 return vault.Vault.phrase_from_key(

1599)                     base64.standard_b64decode(key)
1600)                 )
1601) 

1602)             if use_phrase:
1603)                 form = cast(
1604)                     Literal['NFC', 'NFD', 'NFKC', 'NFKD'],
1605)                     configuration.get('global', {}).get(
1606)                         'unicode_normalization_form', 'NFC'
1607)                     ),
1608)                 )
1609)                 assert form in {'NFC', 'NFD', 'NFKC', 'NFKD'}
1610)                 _check_for_misleading_passphrase(

1611)                     _ORIGIN.INTERACTIVE, {'phrase': phrase}, form=form

1612)                 )
1613) 

1614)             # If either --key or --phrase are given, use that setting.
1615)             # Otherwise, if both key and phrase are set in the config,

1616)             # use the key.  Otherwise, if only one of key and phrase is
1617)             # set in the config, use that one.  In all these above
1618)             # cases, set the phrase via vault.Vault.phrase_from_key if
1619)             # a key is given.  Finally, if nothing is set, error out.

1620)             if use_key or use_phrase:

1621)                 kwargs['phrase'] = key_to_phrase(key) if use_key else phrase

1622)             elif kwargs.get('key'):

1623)                 kwargs['phrase'] = key_to_phrase(kwargs['key'])

1624)             elif kwargs.get('phrase'):
1625)                 pass
1626)             else:

1627)                 msg = (

1628)                     'No passphrase or key given on command-line '

1629)                     'or in configuration'
1630)                 )

1631)                 raise click.UsageError(msg)

1632)             kwargs.pop('key', '')

1633)             result = vault.Vault(**kwargs).generate(service)

1634)             click.echo(result.decode('ASCII'))