derivepassphrase.git

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

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

5) # ruff: noqa: TRY400
6) 

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

8) 
9) from __future__ import annotations
10) 

11) import base64
12) import collections

13) import copy

14) import enum

15) import importlib

16) import inspect
17) import json

18) import logging

19) import os

20) import sys

21) import unicodedata

22) import warnings

23) from typing import (
24)     TYPE_CHECKING,

25)     Callable,

26)     Literal,

27)     NoReturn,

28)     TextIO,

29)     TypeVar,

30)     cast,

31) )

32) 
33) import click

34) from typing_extensions import (
35)     Any,

36)     ParamSpec,
37)     Self,

38)     assert_never,
39) )
40) 

41) import derivepassphrase as dpp

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

43) 

44) if sys.version_info >= (3, 11):
45)     import tomllib
46) else:
47)     import tomli as tomllib
48) 

49) if TYPE_CHECKING:
50)     import pathlib

51)     import socket

52)     import types

53)     from collections.abc import (
54)         Iterator,

55)         MutableSequence,

56)         Sequence,
57)     )

58) 
59) __author__ = dpp.__author__
60) __version__ = dpp.__version__
61) 
62) __all__ = ('derivepassphrase',)
63) 

64) PROG_NAME = 'derivepassphrase'

65) KEY_DISPLAY_LENGTH = 50

66) 
67) # Error messages
68) _INVALID_VAULT_CONFIG = 'Invalid vault config'
69) _AGENT_COMMUNICATION_ERROR = 'Error communicating with the SSH agent'
70) _NO_USABLE_KEYS = 'No usable SSH keys were found'
71) _EMPTY_SELECTION = 'Empty selection'

72) 
73) 

74) # Logging
75) # =======
76) 
77) 
78) class ClickEchoStderrHandler(logging.Handler):
79)     """A [`logging.Handler`][] for `click` applications.
80) 
81)     Outputs log messages to [`sys.stderr`][] via [`click.echo`][].
82) 
83)     """
84) 
85)     def emit(self, record: logging.LogRecord) -> None:
86)         """Emit a log record.
87) 
88)         Format the log record, then emit it via [`click.echo`][] to
89)         [`sys.stderr`][].
90) 
91)         """
92)         click.echo(self.format(record), err=True)
93) 
94) 
95) class CLIofPackageFormatter(logging.Formatter):
96)     """A [`logging.LogRecord`][] formatter for the CLI of a Python package.
97) 
98)     Assuming a package `PKG` and loggers within the same hierarchy
99)     `PKG`, format all log records from that hierarchy for proper user
100)     feedback on the console.  Intended for use with [`click`][CLICK] and
101)     when `PKG` provides a command-line tool `PKG` and when logs from
102)     that package should show up as output of the command-line tool.
103) 
104)     Essentially, this prepends certain short strings to the log message
105)     lines to make them readable as standard error output.
106) 
107)     Because this log output is intended to be displayed on standard
108)     error as high-level diagnostic output, you are strongly discouraged
109)     from changing the output format to include more tokens besides the
110)     log message.  Use a dedicated log file handler instead, without this
111)     formatter.
112) 
113)     [CLICK]: https://pypi.org/projects/click/
114) 
115)     """
116) 
117)     def __init__(
118)         self,
119)         *,
120)         prog_name: str = PROG_NAME,
121)         package_name: str | None = None,
122)     ) -> None:
123)         self.prog_name = prog_name
124)         self.package_name = (
125)             package_name
126)             if package_name is not None
127)             else prog_name.lower().replace(' ', '_').replace('-', '_')
128)         )
129) 
130)     def format(self, record: logging.LogRecord) -> str:
131)         """Format a log record suitably for standard error console output.
132) 
133)         Prepend the formatted string `"PROG_NAME: LABEL"` to each line
134)         of the message, where `PROG_NAME` is the program name, and
135)         `LABEL` depends on the record's level and on the logger name as
136)         follows:
137) 
138)           * For records at level [`logging.DEBUG`][], `LABEL` is
139)             `"Debug: "`.
140)           * For records at level [`logging.INFO`][], `LABEL` is the
141)             empty string.
142)           * For records at level [`logging.WARNING`][], `LABEL` is
143)             `"Deprecation warning: "` if the logger is named
144)             `PKG.deprecation` (where `PKG` is the package name), else
145)             `"Warning: "`.
146)           * For records at level [`logging.ERROR`][] and
147)             [`logging.CRITICAL`][] `"Error: "`, `LABEL` is `"ERROR: "`.
148) 
149)         The level indication strings at level `WARNING` or above are
150)         highlighted.  Use [`click.echo`][] to output them and remove
151)         color output if necessary.
152) 
153)         Args:
154)             record: A log record.
155) 
156)         Returns:
157)             A formatted log record.
158) 
159)         Raises:
160)             AssertionError:
161)                 The log level is not supported.
162) 
163)         """
164)         preliminary_result = record.getMessage()
165)         prefix = f'{self.prog_name}: '
166)         if record.levelname == 'DEBUG':  # pragma: no cover
167)             level_indicator = 'Debug: '
168)         elif record.levelname == 'INFO':
169)             level_indicator = ''
170)         elif record.levelname == 'WARNING':
171)             level_indicator = (
172)                 f'{click.style("Deprecation warning", bold=True)}: '
173)                 if record.name.endswith('.deprecation')
174)                 else f'{click.style("Warning", bold=True)}: '
175)             )
176)         elif record.levelname in {'ERROR', 'CRITICAL'}:
177)             level_indicator = ''
178)         else:  # pragma: no cover
179)             msg = f'Unsupported logging level: {record.levelname}'
180)             raise AssertionError(msg)
181)         return ''.join(
182)             prefix + level_indicator + line
183)             for line in preliminary_result.splitlines(True)  # noqa: FBT003
184)         )
185) 
186) 
187) class StandardCLILogging:
188)     """Set up CLI logging handlers upon instantiation."""
189) 
190)     prog_name = PROG_NAME
191)     package_name = PROG_NAME.lower().replace(' ', '_').replace('-', '_')
192)     cli_formatter = CLIofPackageFormatter(
193)         prog_name=prog_name, package_name=package_name
194)     )
195)     cli_handler = ClickEchoStderrHandler()
196)     cli_handler.addFilter(logging.Filter(name=package_name))
197)     cli_handler.setFormatter(cli_formatter)
198)     cli_handler.setLevel(logging.WARNING)
199)     warnings_handler = ClickEchoStderrHandler()
200)     warnings_handler.addFilter(logging.Filter(name='py.warnings'))
201)     warnings_handler.setFormatter(cli_formatter)
202)     warnings_handler.setLevel(logging.WARNING)
203) 
204)     @classmethod
205)     def ensure_standard_logging(cls) -> StandardLoggingContextManager:
206)         """Return a context manager to ensure standard logging is set up."""
207)         return StandardLoggingContextManager(
208)             handler=cls.cli_handler,
209)             root_logger=cls.package_name,
210)         )
211) 
212)     @classmethod
213)     def ensure_standard_warnings_logging(
214)         cls,
215)     ) -> StandardWarningsLoggingContextManager:
216)         """Return a context manager to ensure warnings logging is set up."""
217)         return StandardWarningsLoggingContextManager(
218)             handler=cls.warnings_handler,
219)         )
220) 
221) 
222) class StandardLoggingContextManager:
223)     """A reentrant context manager setting up standard CLI logging.
224) 
225)     Ensures that the given handler (defaulting to the CLI logging
226)     handler) is added to the named logger (defaulting to the root
227)     logger), and if it had to be added, then that it will be removed
228)     upon exiting the context.
229) 
230)     Reentrant, but not thread safe, because it temporarily modifies
231)     global state.
232) 
233)     """
234) 
235)     def __init__(
236)         self,
237)         handler: logging.Handler,
238)         root_logger: str | None = None,
239)     ) -> None:
240)         self.handler = handler
241)         self.root_logger_name = root_logger
242)         self.base_logger = logging.getLogger(self.root_logger_name)
243)         self.action_required: MutableSequence[bool] = collections.deque()
244) 
245)     def __enter__(self) -> Self:
246)         self.action_required.append(
247)             self.handler not in self.base_logger.handlers
248)         )
249)         if self.action_required[-1]:
250)             self.base_logger.addHandler(self.handler)
251)         return self
252) 
253)     def __exit__(
254)         self,
255)         exc_type: type[BaseException] | None,
256)         exc_value: BaseException | None,
257)         exc_tb: types.TracebackType | None,
258)     ) -> Literal[False]:
259)         if self.action_required[-1]:
260)             self.base_logger.removeHandler(self.handler)
261)         self.action_required.pop()
262)         return False
263) 
264) 
265) class StandardWarningsLoggingContextManager(StandardLoggingContextManager):
266)     """A reentrant context manager setting up standard warnings logging.
267) 
268)     Ensures that warnings are being diverted to the logging system, and
269)     that the given handler (defaulting to the CLI logging handler) is
270)     added to the warnings logger. If the handler had to be added, then
271)     it will be removed upon exiting the context.
272) 
273)     Reentrant, but not thread safe, because it temporarily modifies
274)     global state.
275) 
276)     """
277) 
278)     def __init__(
279)         self,
280)         handler: logging.Handler,
281)     ) -> None:
282)         super().__init__(handler=handler, root_logger='py.warnings')
283)         self.stack: MutableSequence[
284)             tuple[
285)                 Callable[
286)                     [
287)                         type[BaseException] | None,
288)                         BaseException | None,
289)                         types.TracebackType | None,
290)                     ],
291)                     None,
292)                 ],
293)                 Callable[
294)                     [
295)                         str | Warning,
296)                         type[Warning],
297)                         str,
298)                         int,
299)                         TextIO | None,
300)                         str | None,
301)                     ],
302)                     None,
303)                 ],
304)             ]
305)         ] = collections.deque()
306) 
307)     def __enter__(self) -> Self:
308)         def showwarning(  # noqa: PLR0913,PLR0917
309)             message: str | Warning,
310)             category: type[Warning],
311)             filename: str,
312)             lineno: int,
313)             file: TextIO | None = None,
314)             line: str | None = None,
315)         ) -> None:
316)             if file is not None:  # pragma: no cover
317)                 self.stack[0][1](
318)                     message, category, filename, lineno, file, line
319)                 )
320)             else:
321)                 logging.getLogger('py.warnings').warning(
322)                     str(
323)                         warnings.formatwarning(
324)                             message, category, filename, lineno, line
325)                         )
326)                     )
327)                 )
328) 
329)         ctx = warnings.catch_warnings()
330)         exit_func = ctx.__exit__
331)         ctx.__enter__()
332)         self.stack.append((exit_func, warnings.showwarning))
333)         warnings.showwarning = showwarning
334)         return super().__enter__()
335) 
336)     def __exit__(
337)         self,
338)         exc_type: type[BaseException] | None,
339)         exc_value: BaseException | None,
340)         exc_tb: types.TracebackType | None,
341)     ) -> Literal[False]:
342)         ret = super().__exit__(exc_type, exc_value, exc_tb)
343)         val = self.stack.pop()[0](exc_type, exc_value, exc_tb)
344)         assert not val
345)         return ret
346) 
347) 
348) P = ParamSpec('P')
349) R = TypeVar('R')
350) 
351) 

352) def adjust_logging_level(

353)     ctx: click.Context,
354)     /,
355)     param: click.Parameter | None = None,

356)     value: int | None = None,

357) ) -> None:

358)     """Change the logs that are emitted to standard error.

359) 
360)     This modifies the [`StandardCLILogging`][] settings such that log

361)     records at the respective level are emitted, based on the `param`
362)     and the `value`.

363) 
364)     """

365)     # Note: If multiple options use this callback, then we will be
366)     # called multiple times.  Ensure the runs are idempotent.
367)     if param is None or value is None or ctx.resilient_parsing:
368)         return
369)     StandardCLILogging.cli_handler.setLevel(value)
370)     logging.getLogger(StandardCLILogging.package_name).setLevel(value)

371) 
372) 

373) # Option parsing and grouping
374) # ===========================
375) 
376) 
377) class OptionGroupOption(click.Option):
378)     """A [`click.Option`][] with an associated group name and group epilog.
379) 
380)     Used by [`CommandWithHelpGroups`][] to print help sections.  Each
381)     subclass contains its own group name and epilog.
382) 
383)     Attributes:
384)         option_group_name:
385)             The name of the option group.  Used as a heading on the help
386)             text for options in this section.
387)         epilog:
388)             An epilog to print after listing the options in this
389)             section.
390) 
391)     """
392) 
393)     option_group_name: str = ''
394)     """"""
395)     epilog: str = ''
396)     """"""
397) 
398)     def __init__(self, *args: Any, **kwargs: Any) -> None:  # noqa: ANN401
399)         if self.__class__ == __class__:  # type: ignore[name-defined]
400)             raise NotImplementedError
401)         super().__init__(*args, **kwargs)
402) 
403) 
404) class CommandWithHelpGroups(click.Command):
405)     """A [`click.Command`][] with support for help/option groups.
406) 
407)     Inspired by [a comment on `pallets/click#373`][CLICK_ISSUE], and
408)     further modified to support group epilogs.
409) 
410)     [CLICK_ISSUE]: https://github.com/pallets/click/issues/373#issuecomment-515293746
411) 
412)     """
413) 
414)     def format_options(
415)         self,
416)         ctx: click.Context,
417)         formatter: click.HelpFormatter,
418)     ) -> None:
419)         r"""Format options on the help listing, grouped into sections.
420) 
421)         This is a callback for [`click.Command.get_help`][] that
422)         implements the `--help` listing, by calling appropriate methods
423)         of the `formatter`.  We list all options (like the base
424)         implementation), but grouped into sections according to the
425)         concrete [`click.Option`][] subclass being used.  If the option
426)         is an instance of some subclass of [`OptionGroupOption`][], then
427)         the section heading and the epilog are taken from the
428)         [`option_group_name`] [OptionGroupOption.option_group_name] and
429)         [`epilog`] [OptionGroupOption.epilog] attributes; otherwise, the
430)         section heading is "Options" (or "Other options" if there are
431)         other option groups) and the epilog is empty.
432) 
433)         Args:
434)             ctx:
435)                 The click context.
436)             formatter:
437)                 The formatter for the `--help` listing.
438) 
439)         """
440)         help_records: dict[str, list[tuple[str, str]]] = {}
441)         epilogs: dict[str, str] = {}
442)         params = self.params[:]
443)         if (  # pragma: no branch
444)             (help_opt := self.get_help_option(ctx)) is not None
445)             and help_opt not in params
446)         ):
447)             params.append(help_opt)
448)         for param in params:
449)             rec = param.get_help_record(ctx)
450)             if rec is not None:
451)                 if isinstance(param, OptionGroupOption):
452)                     group_name = param.option_group_name
453)                     epilogs.setdefault(group_name, param.epilog)
454)                 else:
455)                     group_name = ''
456)                 help_records.setdefault(group_name, []).append(rec)
457)         default_group = help_records.pop('')
458)         default_group_name = (
459)             'Other Options' if len(default_group) > 1 else 'Options'
460)         )
461)         help_records[default_group_name] = default_group
462)         for group_name, records in help_records.items():
463)             with formatter.section(group_name):
464)                 formatter.write_dl(records)
465)             epilog = inspect.cleandoc(epilogs.get(group_name, ''))
466)             if epilog:
467)                 formatter.write_paragraph()
468)                 with formatter.indentation():
469)                     formatter.write_text(epilog)
470) 
471) 

472) class LoggingOption(OptionGroupOption):
473)     """Logging options for the CLI."""
474) 
475)     option_group_name = 'Logging'
476)     epilog = ''
477) 
478) 

479) debug_option = click.option(
480)     '--debug',
481)     'logging_level',
482)     is_flag=True,
483)     flag_value=logging.DEBUG,
484)     expose_value=False,
485)     callback=adjust_logging_level,
486)     help='also emit debug information (implies --verbose)',
487)     cls=LoggingOption,
488) )
489) verbose_option = click.option(
490)     '-v',
491)     '--verbose',
492)     'logging_level',
493)     is_flag=True,
494)     flag_value=logging.INFO,
495)     expose_value=False,
496)     callback=adjust_logging_level,
497)     help='emit extra/progress information to standard error',
498)     cls=LoggingOption,
499) )
500) quiet_option = click.option(
501)     '-q',
502)     '--quiet',
503)     'logging_level',
504)     is_flag=True,
505)     flag_value=logging.ERROR,
506)     expose_value=False,
507)     callback=adjust_logging_level,
508)     help='suppress even warnings, emit only errors',
509)     cls=LoggingOption,
510) )
511) 
512) 

513) def standard_logging_options(f: Callable[P, R]) -> Callable[P, R]:
514)     """Decorate the function with standard logging click options.
515) 
516)     Adds the three click options `-v`/`--verbose`, `-q`/`--quiet` and
517)     `--debug`, which issue callbacks to the [`log_info`][],
518)     [`silence_warnings`][] and [`log_debug`][] functions, respectively.
519) 
520)     Args:
521)         f: A callable to decorate.
522) 
523)     Returns:
524)         The decorated callable.
525) 
526)     """

527)     return debug_option(verbose_option(quiet_option(f)))

528) 
529) 

530) # Top-level
531) # =========
532) 
533) 

534) class _DefaultToVaultGroup(click.Group):
535)     """A helper class to implement the default-to-"vault"-subcommand behavior.
536) 
537)     Modifies internal [`click.MultiCommand`][] methods, and thus is both
538)     an implementation detail and a kludge.
539) 
540)     """
541) 
542)     def resolve_command(
543)         self, ctx: click.Context, args: list[str]
544)     ) -> tuple[str | None, click.Command | None, list[str]]:
545)         """Resolve a command, but default to "vault" instead of erroring out.
546) 
547)         Based on code from click 8.1, which appears to be essentially
548)         untouched since at least click 3.2.
549) 
550)         """
551)         cmd_name = click.utils.make_str(args[0])
552) 
553)         # ORIGINAL COMMENT
554)         # Get the command
555)         cmd = self.get_command(ctx, cmd_name)
556) 
557)         # ORIGINAL COMMENT
558)         # If we can't find the command but there is a normalization
559)         # function available, we try with that one.
560)         if (  # pragma: no cover
561)             cmd is None and ctx.token_normalize_func is not None
562)         ):
563)             cmd_name = ctx.token_normalize_func(cmd_name)
564)             cmd = self.get_command(ctx, cmd_name)
565) 
566)         # ORIGINAL COMMENT
567)         # If we don't find the command we want to show an error message
568)         # to the user that it was not provided.  However, there is
569)         # something else we should do: if the first argument looks like
570)         # an option we want to kick off parsing again for arguments to
571)         # resolve things like --help which now should go to the main
572)         # place.
573)         if cmd is None and not ctx.resilient_parsing:
574)             if click.parser.split_opt(cmd_name)[0]:
575)                 self.parse_args(ctx, ctx.args)
576)             # Instead of calling ctx.fail here, default to "vault", and
577)             # issue a deprecation warning.

578)             logger = logging.getLogger(PROG_NAME)
579)             deprecation = logging.getLogger(f'{PROG_NAME}.deprecation')
580)             deprecation.warning(
581)                 'A subcommand will be required in v1.0. '
582)                 'See --help for available subcommands.'

583)             )

584)             logger.warning('Defaulting to subcommand "vault".')

585)             cmd_name = 'vault'
586)             cmd = self.get_command(ctx, cmd_name)
587)             assert cmd is not None, 'Mandatory subcommand "vault" missing!'
588)             args = [cmd_name, *args]
589)         return cmd_name if cmd else None, cmd, args[1:]  # noqa: DOC201
590) 
591) 

592) class _TopLevelCLIEntryPoint(_DefaultToVaultGroup):
593)     """A minor variation of _DefaultToVaultGroup for the top-level command.
594) 
595)     When called as a function, this sets up the environment properly
596)     before invoking the actual callbacks.  Currently, this means setting
597)     up the logging subsystem and the delegation of Python warnings to
598)     the logging subsystem.
599) 
600)     The environment setup can be bypassed by calling the `.main` method
601)     directly.
602) 
603)     """
604) 
605)     def __call__(  # pragma: no cover
606)         self,
607)         *args: Any,  # noqa: ANN401
608)         **kwargs: Any,  # noqa: ANN401
609)     ) -> Any:  # noqa: ANN401
610)         """"""  # noqa: D419
611)         # Coverage testing is done with the `click.testing` module,
612)         # which does not use the `__call__` shortcut.  So it is normal
613)         # that this function is never called, and thus should be
614)         # excluded from coverage.
615)         with (
616)             StandardCLILogging.ensure_standard_logging(),
617)             StandardCLILogging.ensure_standard_warnings_logging(),
618)         ):
619)             return self.main(*args, **kwargs)
620) 
621) 

622) @click.group(

623)     context_settings={
624)         'help_option_names': ['-h', '--help'],
625)         'ignore_unknown_options': True,
626)         'allow_interspersed_args': False,
627)     },
628)     epilog=r"""
629)         Configuration is stored in a directory according to the
630)         DERIVEPASSPHRASE_PATH variable, which defaults to
631)         `~/.derivepassphrase` on UNIX-like systems and
632)         `C:\Users\<user>\AppData\Roaming\Derivepassphrase` on Windows.

633)     """,

634)     invoke_without_command=True,

635)     cls=_TopLevelCLIEntryPoint,

636) )
637) @click.version_option(version=dpp.__version__, prog_name=PROG_NAME)

638) @standard_logging_options

639) @click.pass_context
640) def derivepassphrase(ctx: click.Context, /) -> None:

641)     """Derive a strong passphrase, deterministically, from a master secret.
642) 
643)     Using a master secret, derive a passphrase for a named service,
644)     subject to constraints e.g. on passphrase length, allowed
645)     characters, etc.  The exact derivation depends on the selected
646)     derivation scheme.  For each scheme, it is computationally
647)     infeasible to discern the master secret from the derived passphrase.
648)     The derivations are also deterministic, given the same inputs, thus
649)     the resulting passphrases need not be stored explicitly.  The
650)     service name and constraints themselves also generally need not be
651)     kept secret, depending on the scheme.
652) 
653)     The currently implemented subcommands are "vault" (for the scheme
654)     used by vault) and "export" (for exporting foreign configuration
655)     data).  See the respective `--help` output for instructions.  If no
656)     subcommand is given, we default to "vault".
657) 
658)     Deprecation notice: Defaulting to "vault" is deprecated.  Starting
659)     in v1.0, the subcommand must be specified explicitly.\f
660) 
661)     This is a [`click`][CLICK]-powered command-line interface function,
662)     and not intended for programmatic use.  Call with arguments
663)     `['--help']` to see full documentation of the interface.  (See also
664)     [`click.testing.CliRunner`][] for controlled, programmatic
665)     invocation.)
666) 

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

668) 
669)     """  # noqa: D301

670)     logger = logging.getLogger(PROG_NAME)
671)     deprecation = logging.getLogger(f'{PROG_NAME}.deprecation')

672)     if ctx.invoked_subcommand is None:

673)         deprecation.warning(
674)             'A subcommand will be required in v1.0. '
675)             'See --help for available subcommands.'

676)         )

677)         logger.warning('Defaulting to subcommand "vault".')

678)         # See definition of click.Group.invoke, non-chained case.
679)         with ctx:
680)             sub_ctx = derivepassphrase_vault.make_context(
681)                 'vault', ctx.args, parent=ctx
682)             )
683)             with sub_ctx:
684)                 return derivepassphrase_vault.invoke(sub_ctx)
685)     return None

686) 
687) 
688) # Exporter
689) # ========
690) 
691) 

692) @derivepassphrase.group(
693)     'export',

694)     context_settings={
695)         'help_option_names': ['-h', '--help'],
696)         'ignore_unknown_options': True,
697)         'allow_interspersed_args': False,

698)     },
699)     invoke_without_command=True,
700)     cls=_DefaultToVaultGroup,

701) )
702) @click.version_option(version=dpp.__version__, prog_name=PROG_NAME)

703) @standard_logging_options

704) @click.pass_context
705) def derivepassphrase_export(ctx: click.Context, /) -> None:

706)     """Export a foreign configuration to standard output.
707) 
708)     Read a foreign system configuration, extract all information from
709)     it, and export the resulting configuration to standard output.
710) 
711)     The only available subcommand is "vault", which implements the
712)     vault-native configuration scheme.  If no subcommand is given, we
713)     default to "vault".
714) 
715)     Deprecation notice: Defaulting to "vault" is deprecated.  Starting
716)     in v1.0, the subcommand must be specified explicitly.\f
717) 
718)     This is a [`click`][CLICK]-powered command-line interface function,
719)     and not intended for programmatic use.  Call with arguments
720)     `['--help']` to see full documentation of the interface.  (See also
721)     [`click.testing.CliRunner`][] for controlled, programmatic
722)     invocation.)
723) 

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

725) 
726)     """  # noqa: D301

727)     logger = logging.getLogger(PROG_NAME)
728)     deprecation = logging.getLogger(f'{PROG_NAME}.deprecation')

729)     if ctx.invoked_subcommand is None:

730)         deprecation.warning(
731)             'A subcommand will be required in v1.0. '
732)             'See --help for available subcommands.'

733)         )

734)         logger.warning('Defaulting to subcommand "vault".')

735)         # See definition of click.Group.invoke, non-chained case.
736)         with ctx:
737)             sub_ctx = derivepassphrase_export_vault.make_context(
738)                 'vault', ctx.args, parent=ctx
739)             )
740)             # Constructing the subcontext above will usually already
741)             # lead to a click.UsageError, so this block typically won't
742)             # actually be called.
743)             with sub_ctx:  # pragma: no cover
744)                 return derivepassphrase_export_vault.invoke(sub_ctx)
745)     return None

746) 
747) 
748) def _load_data(
749)     fmt: Literal['v0.2', 'v0.3', 'storeroom'],
750)     path: str | bytes | os.PathLike[str],
751)     key: bytes,
752) ) -> Any:  # noqa: ANN401
753)     contents: bytes
754)     module: types.ModuleType

755)     # Use match/case here once Python 3.9 becomes unsupported.
756)     if fmt == 'v0.2':
757)         module = importlib.import_module(
758)             'derivepassphrase.exporter.vault_native'
759)         )
760)         if module.STUBBED:
761)             raise ModuleNotFoundError
762)         with open(path, 'rb') as infile:
763)             contents = base64.standard_b64decode(infile.read())
764)         return module.export_vault_native_data(
765)             contents, key, try_formats=['v0.2']
766)         )
767)     elif fmt == 'v0.3':  # noqa: RET505
768)         module = importlib.import_module(
769)             'derivepassphrase.exporter.vault_native'
770)         )
771)         if module.STUBBED:
772)             raise ModuleNotFoundError
773)         with open(path, 'rb') as infile:
774)             contents = base64.standard_b64decode(infile.read())
775)         return module.export_vault_native_data(
776)             contents, key, try_formats=['v0.3']
777)         )
778)     elif fmt == 'storeroom':
779)         module = importlib.import_module('derivepassphrase.exporter.storeroom')
780)         if module.STUBBED:
781)             raise ModuleNotFoundError
782)         return module.export_storeroom_data(path, key)
783)     else:  # pragma: no cover
784)         assert_never(fmt)

785) 
786) 

787) @derivepassphrase_export.command(
788)     'vault',

789)     context_settings={'help_option_names': ['-h', '--help']},
790) )

791) @standard_logging_options

792) @click.option(
793)     '-f',
794)     '--format',
795)     'formats',
796)     metavar='FMT',
797)     multiple=True,
798)     default=('v0.3', 'v0.2', 'storeroom'),
799)     type=click.Choice(['v0.2', 'v0.3', 'storeroom']),
800)     help='try the following storage formats, in order (default: v0.3, v0.2)',
801) )
802) @click.option(
803)     '-k',
804)     '--key',
805)     metavar='K',
806)     help=(
807)         'use K as the storage master key '
808)         '(default: check the `VAULT_KEY`, `LOGNAME`, `USER` or '
809)         '`USERNAME` environment variables)'
810)     ),
811) )
812) @click.argument('path', metavar='PATH', required=True)
813) @click.pass_context
814) def derivepassphrase_export_vault(
815)     ctx: click.Context,
816)     /,
817)     *,
818)     path: str | bytes | os.PathLike[str],
819)     formats: Sequence[Literal['v0.2', 'v0.3', 'storeroom']] = (),
820)     key: str | bytes | None = None,
821) ) -> None:
822)     """Export a vault-native configuration to standard output.
823) 
824)     Read the vault-native configuration at PATH, extract all information
825)     from it, and export the resulting configuration to standard output.
826)     Depending on the configuration format, PATH may either be a file or
827)     a directory.  Supports the vault "v0.2", "v0.3" and "storeroom"
828)     formats.
829) 
830)     If PATH is explicitly given as `VAULT_PATH`, then use the
831)     `VAULT_PATH` environment variable to determine the correct path.
832)     (Use `./VAULT_PATH` or similar to indicate a file/directory actually
833)     named `VAULT_PATH`.)
834) 
835)     """

836)     logger = logging.getLogger(PROG_NAME)

837)     if path in {'VAULT_PATH', b'VAULT_PATH'}:
838)         path = exporter.get_vault_path()
839)     if key is None:
840)         key = exporter.get_vault_key()
841)     elif isinstance(key, str):  # pragma: no branch
842)         key = key.encode('utf-8')
843)     for fmt in formats:
844)         try:
845)             config = _load_data(fmt, path, key)
846)         except (
847)             IsADirectoryError,
848)             NotADirectoryError,
849)             ValueError,
850)             RuntimeError,
851)         ):

852)             logger.info('Cannot load as %s: %s', fmt, path)

853)             continue
854)         except OSError as exc:

855)             logger.error(
856)                 'Cannot parse %r as a valid config: %s: %r',
857)                 path,
858)                 exc.strerror,
859)                 exc.filename,

860)             )
861)             ctx.exit(1)
862)         except ModuleNotFoundError:
863)             # TODO(the-13th-letter): Use backslash continuation.
864)             # https://github.com/nedbat/coveragepy/issues/1836

865)             logger.error(
866)                 'Cannot load the required Python module "cryptography".'
867)             )
868)             logger.info('pip users: see the "export" extra.')

869)             ctx.exit(1)
870)         else:
871)             if not _types.is_vault_config(config):

872)                 logger.error('Invalid vault config: %r', config)

873)                 ctx.exit(1)
874)             click.echo(json.dumps(config, indent=2, sort_keys=True))
875)             break
876)     else:

877)         logger.error('Cannot parse %r as a valid config.', path)

878)         ctx.exit(1)
879) 
880) 
881) # Vault
882) # =====
883) 
884) 

885) def _config_filename(

886)     subsystem: str | None = 'old settings.json',

887) ) -> str | bytes | pathlib.Path:
888)     """Return the filename of the configuration file for the subsystem.
889) 
890)     The (implicit default) file is currently named `settings.json`,
891)     located within the configuration directory as determined by the
892)     `DERIVEPASSPHRASE_PATH` environment variable, or by
893)     [`click.get_app_dir`][] in POSIX mode.  Depending on the requested
894)     subsystem, this will usually be a different file within that
895)     directory.

896) 

897)     Args:
898)         subsystem:
899)             Name of the configuration subsystem whose configuration
900)             filename to return.  If not given, return the old filename
901)             from before the subcommand migration.  If `None`, return the
902)             configuration directory instead.
903) 
904)     Raises:
905)         AssertionError:
906)             An unknown subsystem was passed.
907) 
908)     Deprecated:
909)         Since v0.2.0: The implicit default subsystem and the old
910)         configuration filename are deprecated, and will be removed in v1.0.
911)         The subsystem will be mandatory to specify.

912) 
913)     """
914)     path: str | bytes | pathlib.Path

915)     path = os.getenv(PROG_NAME.upper() + '_PATH') or click.get_app_dir(
916)         PROG_NAME, force_posix=True
917)     )

918)     # Use match/case here once Python 3.9 becomes unsupported.
919)     if subsystem is None:
920)         return path

921)     elif subsystem == 'vault':  # noqa: RET505

922)         filename = f'{subsystem}.json'

923)     elif subsystem == 'user configuration':
924)         filename = 'config.toml'

925)     elif subsystem == 'old settings.json':
926)         filename = 'settings.json'

927)     else:  # pragma: no cover
928)         msg = f'Unknown configuration subsystem: {subsystem!r}'
929)         raise AssertionError(msg)

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

931) 
932) 

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

934)     """Load a vault(1)-compatible config from the application directory.
935) 

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

938) 
939)     Returns:

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

941) 
942)     Raises:
943)         OSError:
944)             There was an OS error accessing the file.
945)         ValueError:
946)             The data loaded from the file is not a vault(1)-compatible
947)             config.
948) 
949)     """

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

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

953)     if not _types.is_vault_config(data):

954)         raise ValueError(_INVALID_VAULT_CONFIG)

955)     return data
956) 
957) 

958) def _migrate_and_load_old_config() -> tuple[
959)     _types.VaultConfig, OSError | None
960) ]:

961)     """Load and migrate a vault(1)-compatible config.
962) 

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

966) 
967)     Returns:
968)         The vault settings, and an optional exception encountered during

969)         migration.  See [`_types.VaultConfig`][] for details on the
970)         former.

971) 
972)     Raises:
973)         OSError:
974)             There was an OS error accessing the old file.
975)         ValueError:
976)             The data loaded from the file is not a vault(1)-compatible
977)             config.
978) 
979)     """
980)     new_filename = _config_filename(subsystem='vault')

981)     old_filename = _config_filename(subsystem='old settings.json')

982)     with open(old_filename, 'rb') as fileobj:
983)         data = json.load(fileobj)
984)     if not _types.is_vault_config(data):
985)         raise ValueError(_INVALID_VAULT_CONFIG)
986)     try:
987)         os.replace(old_filename, new_filename)
988)     except OSError as exc:
989)         return data, exc
990)     else:
991)         return data, None
992) 
993) 

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

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

996) 

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

999) 
1000)     Args:
1001)         config:
1002)             vault configuration to save.
1003) 
1004)     Raises:
1005)         OSError:
1006)             There was an OS error accessing or writing the file.
1007)         ValueError:
1008)             The data cannot be stored as a vault(1)-compatible config.
1009) 
1010)     """

1011)     if not _types.is_vault_config(config):

1012)         raise ValueError(_INVALID_VAULT_CONFIG)

1013)     filename = _config_filename(subsystem='vault')

1014)     filedir = os.path.dirname(os.path.abspath(filename))
1015)     try:
1016)         os.makedirs(filedir, exist_ok=False)
1017)     except FileExistsError:
1018)         if not os.path.isdir(filedir):

1019)             raise  # noqa: DOC501

1020)     with open(filename, 'w', encoding='UTF-8') as fileobj:

1021)         json.dump(config, fileobj)
1022) 
1023) 

1024) def _load_user_config() -> dict[str, Any]:
1025)     """Load the user config from the application directory.
1026) 
1027)     The filename is obtained via [`_config_filename`][].
1028) 
1029)     Returns:
1030)         The user configuration, as a nested `dict`.
1031) 
1032)     Raises:
1033)         OSError:
1034)             There was an OS error accessing the file.
1035)         ValueError:
1036)             The data loaded from the file is not a valid configuration
1037)             file.
1038) 
1039)     """
1040)     filename = _config_filename(subsystem='user configuration')
1041)     with open(filename, 'rb') as fileobj:
1042)         return tomllib.load(fileobj)
1043) 
1044) 

1045) def _get_suitable_ssh_keys(

1046)     conn: ssh_agent.SSHAgentClient | socket.socket | None = None, /

1047) ) -> Iterator[_types.KeyCommentPair]:

1048)     """Yield all SSH keys suitable for passphrase derivation.
1049) 
1050)     Suitable SSH keys are queried from the running SSH agent (see

1051)     [`ssh_agent.SSHAgentClient.list_keys`][]).

1052) 
1053)     Args:
1054)         conn:

1055)             An optional connection hint to the SSH agent.  See
1056)             [`ssh_agent.SSHAgentClient.ensure_agent_subcontext`][].

1057) 
1058)     Yields:

1059)         Every SSH key from the SSH agent that is suitable for passphrase
1060)         derivation.

1061) 
1062)     Raises:

1063)         KeyError:
1064)             `conn` was `None`, and the `SSH_AUTH_SOCK` environment
1065)             variable was not found.

1066)         NotImplementedError:
1067)             `conn` was `None`, and this Python does not support
1068)             [`socket.AF_UNIX`][], so the SSH agent client cannot be
1069)             automatically set up.

1070)         OSError:
1071)             `conn` was a socket or `None`, and there was an error
1072)             setting up a socket connection to the agent.

1073)         LookupError:

1074)             No keys usable for passphrase derivation are loaded into the
1075)             SSH agent.

1076)         RuntimeError:
1077)             There was an error communicating with the SSH agent.

1078)         ssh_agent.SSHAgentFailedError:

1079)             The agent failed to supply a list of loaded keys.

1080) 
1081)     """

1082)     with ssh_agent.SSHAgentClient.ensure_agent_subcontext(conn) as client:

1083)         try:
1084)             all_key_comment_pairs = list(client.list_keys())
1085)         except EOFError as e:  # pragma: no cover

1086)             raise RuntimeError(_AGENT_COMMUNICATION_ERROR) from e

1087)         suitable_keys = copy.copy(all_key_comment_pairs)
1088)         for pair in all_key_comment_pairs:
1089)             key, _comment = pair
1090)             if vault.Vault.is_suitable_ssh_key(key, client=client):
1091)                 yield pair

1092)     if not suitable_keys:  # pragma: no cover

1093)         raise LookupError(_NO_USABLE_KEYS)

1094) 
1095) 
1096) def _prompt_for_selection(

1097)     items: Sequence[str | bytes],
1098)     heading: str = 'Possible choices:',

1099)     single_choice_prompt: str = 'Confirm this choice?',
1100) ) -> int:
1101)     """Prompt user for a choice among the given items.
1102) 
1103)     Print the heading, if any, then present the items to the user.  If
1104)     there are multiple items, prompt the user for a selection, validate
1105)     the choice, then return the list index of the selected item.  If
1106)     there is only a single item, request confirmation for that item
1107)     instead, and return the correct index.
1108) 
1109)     Args:

1110)         items:
1111)             The list of items to choose from.

1112)         heading:
1113)             A heading for the list of items, to print immediately
1114)             before.  Defaults to a reasonable standard heading.  If
1115)             explicitly empty, print no heading.
1116)         single_choice_prompt:
1117)             The confirmation prompt if there is only a single possible
1118)             choice.  Defaults to a reasonable standard prompt.
1119) 
1120)     Returns:
1121)         An index into the items sequence, indicating the user's
1122)         selection.
1123) 
1124)     Raises:
1125)         IndexError:
1126)             The user made an invalid or empty selection, or requested an
1127)             abort.
1128) 
1129)     """
1130)     n = len(items)
1131)     if heading:
1132)         click.echo(click.style(heading, bold=True))
1133)     for i, x in enumerate(items, start=1):
1134)         click.echo(click.style(f'[{i}]', bold=True), nl=False)
1135)         click.echo(' ', nl=False)
1136)         click.echo(x)
1137)     if n > 1:
1138)         choices = click.Choice([''] + [str(i) for i in range(1, n + 1)])
1139)         choice = click.prompt(
1140)             f'Your selection? (1-{n}, leave empty to abort)',

1141)             err=True,
1142)             type=choices,
1143)             show_choices=False,
1144)             show_default=False,
1145)             default='',
1146)         )

1147)         if not choice:

1148)             raise IndexError(_EMPTY_SELECTION)

1149)         return int(choice) - 1

1150)     prompt_suffix = (
1151)         ' ' if single_choice_prompt.endswith(tuple('?.!')) else ': '
1152)     )

1153)     try:

1154)         click.confirm(
1155)             single_choice_prompt,
1156)             prompt_suffix=prompt_suffix,
1157)             err=True,
1158)             abort=True,
1159)             default=False,
1160)             show_default=False,
1161)         )

1162)     except click.Abort:
1163)         raise IndexError(_EMPTY_SELECTION) from None
1164)     return 0

1165) 
1166) 
1167) def _select_ssh_key(

1168)     conn: ssh_agent.SSHAgentClient | socket.socket | None = None, /

1169) ) -> bytes | bytearray:
1170)     """Interactively select an SSH key for passphrase derivation.
1171) 
1172)     Suitable SSH keys are queried from the running SSH agent (see

1173)     [`ssh_agent.SSHAgentClient.list_keys`][]), then the user is prompted
1174)     interactively (see [`click.prompt`][]) for a selection.

1175) 
1176)     Args:
1177)         conn:

1178)             An optional connection hint to the SSH agent.  See
1179)             [`ssh_agent.SSHAgentClient.ensure_agent_subcontext`][].

1180) 
1181)     Returns:
1182)         The selected SSH key.
1183) 
1184)     Raises:

1185)         KeyError:
1186)             `conn` was `None`, and the `SSH_AUTH_SOCK` environment
1187)             variable was not found.

1188)         NotImplementedError:
1189)             `conn` was `None`, and this Python does not support
1190)             [`socket.AF_UNIX`][], so the SSH agent client cannot be
1191)             automatically set up.

1192)         OSError:
1193)             `conn` was a socket or `None`, and there was an error
1194)             setting up a socket connection to the agent.

1195)         IndexError:
1196)             The user made an invalid or empty selection, or requested an
1197)             abort.

1198)         LookupError:

1199)             No keys usable for passphrase derivation are loaded into the
1200)             SSH agent.

1201)         RuntimeError:
1202)             There was an error communicating with the SSH agent.

1203)         SSHAgentFailedError:
1204)             The agent failed to supply a list of loaded keys.

1205)     """
1206)     suitable_keys = list(_get_suitable_ssh_keys(conn))
1207)     key_listing: list[str] = []

1208)     unstring_prefix = ssh_agent.SSHAgentClient.unstring_prefix

1209)     for key, comment in suitable_keys:
1210)         keytype = unstring_prefix(key)[0].decode('ASCII')
1211)         key_str = base64.standard_b64encode(key).decode('ASCII')

1212)         remaining_key_display_length = KEY_DISPLAY_LENGTH - 1 - len(keytype)
1213)         key_extract = min(
1214)             key_str,
1215)             '...' + key_str[-remaining_key_display_length:],
1216)             key=len,

1217)         )

1218)         comment_str = comment.decode('UTF-8', errors='replace')

1219)         key_listing.append(f'{keytype} {key_extract}  {comment_str}')

1220)     choice = _prompt_for_selection(

1221)         key_listing,
1222)         heading='Suitable SSH keys:',
1223)         single_choice_prompt='Use this key?',
1224)     )

1225)     return suitable_keys[choice].key
1226) 
1227) 
1228) def _prompt_for_passphrase() -> str:
1229)     """Interactively prompt for the passphrase.
1230) 
1231)     Calls [`click.prompt`][] internally.  Moved into a separate function
1232)     mainly for testing/mocking purposes.
1233) 
1234)     Returns:
1235)         The user input.
1236) 
1237)     """

1238)     return cast(
1239)         str,
1240)         click.prompt(
1241)             'Passphrase',
1242)             default='',
1243)             hide_input=True,
1244)             show_default=False,
1245)             err=True,
1246)         ),

1247)     )

1248) 
1249) 

1250) def _toml_key(*parts: str) -> str:
1251)     """Return a formatted TOML key, given its parts."""
1252)     def escape(string: str) -> str:
1253)         translated = string.translate({
1254)             0: r'\u0000',
1255)             1: r'\u0001',
1256)             2: r'\u0002',
1257)             3: r'\u0003',
1258)             4: r'\u0004',
1259)             5: r'\u0005',
1260)             6: r'\u0006',
1261)             7: r'\u0007',
1262)             8: r'\b',
1263)             9: r'\t',
1264)             10: r'\n',
1265)             11: r'\u000B',
1266)             12: r'\f',
1267)             13: r'\r',
1268)             14: r'\u000E',
1269)             15: r'\u000F',
1270)             ord('"'): r'\"',
1271)             ord('\\'): r'\\',
1272)             127: r'\u007F',
1273)         })
1274)         return f'"{translated}"' if translated != string else string
1275)     return '.'.join(map(escape, parts))
1276) 
1277) 

1278) class _ORIGIN(enum.Enum):

1279)     INTERACTIVE: str = 'interactive input'

1280) 
1281) 

1282) def _check_for_misleading_passphrase(

1283)     key: tuple[str, ...] | _ORIGIN,

1284)     value: dict[str, Any],
1285)     *,

1286)     main_config: dict[str, Any],

1287) ) -> None:

1288)     form_key = 'unicode-normalization-form'
1289)     default_form: str = main_config.get('vault', {}).get(
1290)         f'default-{form_key}', 'NFC'
1291)     )
1292)     form_dict: dict[str, dict] = main_config.get('vault', {}).get(form_key, {})
1293)     form: Any = (
1294)         default_form
1295)         if isinstance(key, _ORIGIN) or key == ('global',)
1296)         else form_dict.get(key[1], default_form)
1297)     )
1298)     config_key = (
1299)         _toml_key('vault', key[1], form_key)
1300)         if isinstance(key, tuple) and len(key) > 1 and key[1] in form_dict
1301)         else f'vault.default-{form_key}'
1302)     )
1303)     if form not in {'NFC', 'NFD', 'NFKC', 'NFKD'}:
1304)         msg = f'Invalid value {form!r} for config key {config_key}'
1305)         raise AssertionError(msg)

1306)     logger = logging.getLogger(PROG_NAME)

1307)     formatted_key = (
1308)         key.value if isinstance(key, _ORIGIN) else _types.json_path(key)
1309)     )

1310)     if 'phrase' in value:
1311)         phrase = value['phrase']
1312)         if not unicodedata.is_normalized(form, phrase):

1313)             logger.warning(

1314)                 (

1315)                     'the %s passphrase is not %s-normalized.  '

1316)                     'Make sure to double-check this is really the '
1317)                     'passphrase you want.'

1318)                 ),

1319)                 formatted_key,
1320)                 form,

1321)                 stacklevel=2,

1322)             )
1323) 
1324) 

1325) def _key_to_phrase(
1326)     key_: str | bytes | bytearray,
1327)     /,
1328)     *,
1329)     error_callback: Callable[..., NoReturn] = sys.exit,
1330) ) -> bytes | bytearray:
1331)     key = base64.standard_b64decode(key_)
1332)     try:
1333)         with ssh_agent.SSHAgentClient.ensure_agent_subcontext() as client:
1334)             try:
1335)                 return vault.Vault.phrase_from_key(key, conn=client)
1336)             except ssh_agent.SSHAgentFailedError as e:
1337)                 try:
1338)                     keylist = client.list_keys()
1339)                 except ssh_agent.SSHAgentFailedError:
1340)                     pass
1341)                 except Exception as e2:  # noqa: BLE001
1342)                     e.__context__ = e2
1343)                 else:
1344)                     if not any(  # pragma: no branch
1345)                         k == key for k, _ in keylist
1346)                     ):
1347)                         error_callback(
1348)                             'The requested SSH key is not loaded '
1349)                             'into the agent.'
1350)                         )
1351)                 error_callback(e)
1352)     except KeyError:
1353)         error_callback('Cannot find running SSH agent; check SSH_AUTH_SOCK')
1354)     except NotImplementedError:
1355)         error_callback(
1356)             'Cannot connect to SSH agent because '
1357)             'this Python version does not support UNIX domain sockets'
1358)         )
1359)     except OSError as e:
1360)         error_callback('Cannot connect to SSH agent: %s', e.strerror)
1361) 
1362) 

1363) # Concrete option groups used by this command-line interface.
1364) class PasswordGenerationOption(OptionGroupOption):

1365)     """Password generation options for the CLI."""

1366) 

1367)     option_group_name = 'Password generation'

1368)     epilog = """

1369)         Use NUMBER=0, e.g. "--symbol 0", to exclude a character type
1370)         from the output.

1371)     """

1372) 

1373) 
1374) class ConfigurationOption(OptionGroupOption):

1375)     """Configuration options for the CLI."""

1376) 

1377)     option_group_name = 'Configuration'

1378)     epilog = """

1379)         Use $VISUAL or $EDITOR to configure the spawned editor.

1380)     """

1381) 

1382) 
1383) class StorageManagementOption(OptionGroupOption):

1384)     """Storage management options for the CLI."""

1385) 

1386)     option_group_name = 'Storage management'

1387)     epilog = """

1388)         Using "-" as PATH for standard input/standard output is
1389)         supported.

1390)     """
1391) 

1392) 

1393) class CompatibilityOption(OptionGroupOption):
1394)     """Compatibility and incompatibility options for the CLI."""
1395) 
1396)     option_group_name = 'Options concerning compatibility with other tools'
1397) 
1398) 

1399) def _validate_occurrence_constraint(

1400)     ctx: click.Context,
1401)     param: click.Parameter,

1402)     value: Any,  # noqa: ANN401

1403) ) -> int | None:

1404)     """Check that the occurrence constraint is valid (int, 0 or larger).
1405) 
1406)     Args:
1407)         ctx: The `click` context.
1408)         param: The current command-line parameter.
1409)         value: The parameter value to be checked.
1410) 
1411)     Returns:
1412)         The parsed parameter value.
1413) 
1414)     Raises:
1415)         click.BadParameter: The parameter value is invalid.
1416) 
1417)     """

1418)     del ctx  # Unused.

1419)     del param  # Unused.

1420)     if value is None:
1421)         return value
1422)     if isinstance(value, int):
1423)         int_value = value
1424)     else:
1425)         try:
1426)             int_value = int(value, 10)
1427)         except ValueError as e:

1428)             msg = 'not an integer'
1429)             raise click.BadParameter(msg) from e

1430)     if int_value < 0:

1431)         msg = 'not a non-negative integer'
1432)         raise click.BadParameter(msg)

1433)     return int_value
1434) 

1435) 
1436) def _validate_length(

1437)     ctx: click.Context,
1438)     param: click.Parameter,

1439)     value: Any,  # noqa: ANN401

1440) ) -> int | None:

1441)     """Check that the length is valid (int, 1 or larger).
1442) 
1443)     Args:
1444)         ctx: The `click` context.
1445)         param: The current command-line parameter.
1446)         value: The parameter value to be checked.
1447) 
1448)     Returns:
1449)         The parsed parameter value.
1450) 
1451)     Raises:
1452)         click.BadParameter: The parameter value is invalid.
1453) 
1454)     """

1455)     del ctx  # Unused.

1456)     del param  # Unused.

1457)     if value is None:
1458)         return value
1459)     if isinstance(value, int):
1460)         int_value = value
1461)     else:
1462)         try:
1463)             int_value = int(value, 10)
1464)         except ValueError as e:

1465)             msg = 'not an integer'
1466)             raise click.BadParameter(msg) from e

1467)     if int_value < 1:

1468)         msg = 'not a positive integer'
1469)         raise click.BadParameter(msg)

1470)     return int_value
1471) 

1472) 
1473) DEFAULT_NOTES_TEMPLATE = """\

1474) # Enter notes below the line with the cut mark (ASCII scissors and
1475) # dashes).  Lines above the cut mark (such as this one) will be ignored.
1476) #
1477) # If you wish to clear the notes, leave everything beyond the cut mark
1478) # blank.  However, if you leave the *entire* file blank, also removing
1479) # the cut mark, then the edit is aborted, and the old notes contents are
1480) # retained.
1481) #
1482) # - - - - - >8 - - - - - >8 - - - - - >8 - - - - - >8 - - - - -

1483) """

1484) DEFAULT_NOTES_MARKER = '# - - - - - >8 - - - - -'
1485) 
1486) 

1487) @derivepassphrase.command(
1488)     'vault',

1489)     context_settings={'help_option_names': ['-h', '--help']},

1490)     cls=CommandWithHelpGroups,

1491)     epilog=r"""

1492)         WARNING: There is NO WAY to retrieve the generated passphrases
1493)         if the master passphrase, the SSH key, or the exact passphrase
1494)         settings are lost, short of trying out all possible
1495)         combinations.  You are STRONGLY advised to keep independent
1496)         backups of the settings and the SSH key, if any.

1497) 
1498)         The configuration is NOT encrypted, and you are STRONGLY
1499)         discouraged from using a stored passphrase.

1500)     """,
1501) )
1502) @click.option(
1503)     '-p',
1504)     '--phrase',
1505)     'use_phrase',
1506)     is_flag=True,
1507)     help='prompts you for your passphrase',
1508)     cls=PasswordGenerationOption,
1509) )
1510) @click.option(
1511)     '-k',
1512)     '--key',
1513)     'use_key',
1514)     is_flag=True,
1515)     help='uses your SSH private key to generate passwords',
1516)     cls=PasswordGenerationOption,
1517) )
1518) @click.option(
1519)     '-l',
1520)     '--length',
1521)     metavar='NUMBER',
1522)     callback=_validate_length,
1523)     help='emits password of length NUMBER',
1524)     cls=PasswordGenerationOption,
1525) )
1526) @click.option(
1527)     '-r',
1528)     '--repeat',
1529)     metavar='NUMBER',
1530)     callback=_validate_occurrence_constraint,
1531)     help='allows maximum of NUMBER repeated adjacent chars',
1532)     cls=PasswordGenerationOption,
1533) )
1534) @click.option(
1535)     '--lower',
1536)     metavar='NUMBER',
1537)     callback=_validate_occurrence_constraint,
1538)     help='includes at least NUMBER lowercase letters',
1539)     cls=PasswordGenerationOption,
1540) )
1541) @click.option(
1542)     '--upper',
1543)     metavar='NUMBER',
1544)     callback=_validate_occurrence_constraint,
1545)     help='includes at least NUMBER uppercase letters',
1546)     cls=PasswordGenerationOption,
1547) )
1548) @click.option(
1549)     '--number',
1550)     metavar='NUMBER',
1551)     callback=_validate_occurrence_constraint,
1552)     help='includes at least NUMBER digits',
1553)     cls=PasswordGenerationOption,
1554) )
1555) @click.option(
1556)     '--space',
1557)     metavar='NUMBER',
1558)     callback=_validate_occurrence_constraint,
1559)     help='includes at least NUMBER spaces',
1560)     cls=PasswordGenerationOption,
1561) )
1562) @click.option(
1563)     '--dash',
1564)     metavar='NUMBER',
1565)     callback=_validate_occurrence_constraint,
1566)     help='includes at least NUMBER "-" or "_"',
1567)     cls=PasswordGenerationOption,
1568) )
1569) @click.option(
1570)     '--symbol',
1571)     metavar='NUMBER',
1572)     callback=_validate_occurrence_constraint,
1573)     help='includes at least NUMBER symbol chars',
1574)     cls=PasswordGenerationOption,
1575) )
1576) @click.option(
1577)     '-n',
1578)     '--notes',
1579)     'edit_notes',
1580)     is_flag=True,
1581)     help='spawn an editor to edit notes for SERVICE',
1582)     cls=ConfigurationOption,
1583) )
1584) @click.option(
1585)     '-c',
1586)     '--config',
1587)     'store_config_only',
1588)     is_flag=True,
1589)     help='saves the given settings for SERVICE or global',
1590)     cls=ConfigurationOption,
1591) )
1592) @click.option(
1593)     '-x',
1594)     '--delete',
1595)     'delete_service_settings',
1596)     is_flag=True,
1597)     help='deletes settings for SERVICE',
1598)     cls=ConfigurationOption,
1599) )
1600) @click.option(
1601)     '--delete-globals',
1602)     is_flag=True,
1603)     help='deletes the global shared settings',
1604)     cls=ConfigurationOption,
1605) )
1606) @click.option(
1607)     '-X',
1608)     '--clear',
1609)     'clear_all_settings',
1610)     is_flag=True,
1611)     help='deletes all settings',
1612)     cls=ConfigurationOption,
1613) )
1614) @click.option(
1615)     '-e',
1616)     '--export',
1617)     'export_settings',
1618)     metavar='PATH',
1619)     help='export all saved settings into file PATH',
1620)     cls=StorageManagementOption,
1621) )
1622) @click.option(
1623)     '-i',
1624)     '--import',
1625)     'import_settings',
1626)     metavar='PATH',
1627)     help='import saved settings from file PATH',
1628)     cls=StorageManagementOption,

1629) )

1630) @click.option(
1631)     '--overwrite-existing/--merge-existing',
1632)     'overwrite_config',
1633)     default=False,
1634)     help='overwrite or merge (default) the existing configuration',
1635)     cls=CompatibilityOption,
1636) )

1637) @click.version_option(version=dpp.__version__, prog_name=PROG_NAME)

1638) @standard_logging_options

1639) @click.argument('service', required=False)
1640) @click.pass_context

1641) def derivepassphrase_vault(  # noqa: C901,PLR0912,PLR0913,PLR0914,PLR0915

1642)     ctx: click.Context,
1643)     /,
1644)     *,

1645)     service: str | None = None,
1646)     use_phrase: bool = False,
1647)     use_key: bool = False,
1648)     length: int | None = None,
1649)     repeat: int | None = None,
1650)     lower: int | None = None,
1651)     upper: int | None = None,
1652)     number: int | None = None,
1653)     space: int | None = None,
1654)     dash: int | None = None,
1655)     symbol: int | None = None,
1656)     edit_notes: bool = False,
1657)     store_config_only: bool = False,
1658)     delete_service_settings: bool = False,
1659)     delete_globals: bool = False,
1660)     clear_all_settings: bool = False,
1661)     export_settings: TextIO | pathlib.Path | os.PathLike[str] | None = None,
1662)     import_settings: TextIO | pathlib.Path | os.PathLike[str] | None = None,

1663)     overwrite_config: bool = False,

1664) ) -> None:

1665)     """Derive a passphrase using the vault(1) derivation scheme.

1666) 

1667)     Using a master passphrase or a master SSH key, derive a passphrase
1668)     for SERVICE, subject to length, character and character repetition
1669)     constraints.  The derivation is cryptographically strong, meaning
1670)     that even if a single passphrase is compromised, guessing the master
1671)     passphrase or a different service's passphrase is computationally
1672)     infeasible.  The derivation is also deterministic, given the same
1673)     inputs, thus the resulting passphrase need not be stored explicitly.
1674)     The service name and constraints themselves also need not be kept
1675)     secret; the latter are usually stored in a world-readable file.

1676) 
1677)     If operating on global settings, or importing/exporting settings,
1678)     then SERVICE must be omitted.  Otherwise it is required.\f
1679) 
1680)     This is a [`click`][CLICK]-powered command-line interface function,
1681)     and not intended for programmatic use.  Call with arguments

1682)     `['--help']` to see full documentation of the interface.  (See also
1683)     [`click.testing.CliRunner`][] for controlled, programmatic
1684)     invocation.)

1685) 

1686)     [CLICK]: https://pypi.org/package/click/

1687) 
1688)     Parameters:
1689)         ctx (click.Context):
1690)             The `click` context.
1691) 
1692)     Other Parameters:

1693)         service:

1694)             A service name.  Required, unless operating on global
1695)             settings or importing/exporting settings.

1696)         use_phrase:

1697)             Command-line argument `-p`/`--phrase`.  If given, query the
1698)             user for a passphrase instead of an SSH key.

1699)         use_key:

1700)             Command-line argument `-k`/`--key`.  If given, query the
1701)             user for an SSH key instead of a passphrase.

1702)         length:

1703)             Command-line argument `-l`/`--length`.  Override the default
1704)             length of the generated passphrase.

1705)         repeat:

1706)             Command-line argument `-r`/`--repeat`.  Override the default
1707)             repetition limit if positive, or disable the repetition
1708)             limit if 0.

1709)         lower:

1710)             Command-line argument `--lower`.  Require a given amount of
1711)             ASCII lowercase characters if positive, else forbid ASCII
1712)             lowercase characters if 0.

1713)         upper:

1714)             Command-line argument `--upper`.  Same as `lower`, but for
1715)             ASCII uppercase characters.

1716)         number:

1717)             Command-line argument `--number`.  Same as `lower`, but for
1718)             ASCII digits.

1719)         space:

1720)             Command-line argument `--space`.  Same as `lower`, but for

1721)             the space character.

1722)         dash:

1723)             Command-line argument `--dash`.  Same as `lower`, but for

1724)             the hyphen-minus and underscore characters.

1725)         symbol:

1726)             Command-line argument `--symbol`.  Same as `lower`, but for

1727)             all other ASCII printable characters (except backquote).

1728)         edit_notes:

1729)             Command-line argument `-n`/`--notes`.  If given, spawn an
1730)             editor to edit notes for `service`.

1731)         store_config_only:

1732)             Command-line argument `-c`/`--config`.  If given, saves the
1733)             other given settings (`--key`, ..., `--symbol`) to the
1734)             configuration file, either specifically for `service` or as
1735)             global settings.

1736)         delete_service_settings:

1737)             Command-line argument `-x`/`--delete`.  If given, removes
1738)             the settings for `service` from the configuration file.

1739)         delete_globals:

1740)             Command-line argument `--delete-globals`.  If given, removes
1741)             the global settings from the configuration file.

1742)         clear_all_settings:

1743)             Command-line argument `-X`/`--clear`.  If given, removes all
1744)             settings from the configuration file.

1745)         export_settings:
1746)             Command-line argument `-e`/`--export`.  If a file object,
1747)             then it must be open for writing and accept `str` inputs.
1748)             Otherwise, a filename to open for writing.  Using `-` for
1749)             standard output is supported.
1750)         import_settings:
1751)             Command-line argument `-i`/`--import`.  If a file object, it
1752)             must be open for reading and yield `str` values.  Otherwise,
1753)             a filename to open for reading.  Using `-` for standard
1754)             input is supported.

1755)         overwrite_config:
1756)             Command-line arguments `--overwrite-existing` (True) and
1757)             `--merge-existing` (False).  Controls whether config saving
1758)             and config importing overwrite existing configurations, or
1759)             merge them section-wise instead.

1760) 

1761)     """  # noqa: D301

1762)     logger = logging.getLogger(PROG_NAME)
1763)     deprecation = logging.getLogger(PROG_NAME + '.deprecation')

1764)     options_in_group: dict[type[click.Option], list[click.Option]] = {}
1765)     params_by_str: dict[str, click.Parameter] = {}

1766)     for param in ctx.command.params:
1767)         if isinstance(param, click.Option):
1768)             group: type[click.Option]

1769)             # Use match/case here once Python 3.9 becomes unsupported.
1770)             if isinstance(param, PasswordGenerationOption):
1771)                 group = PasswordGenerationOption
1772)             elif isinstance(param, ConfigurationOption):
1773)                 group = ConfigurationOption
1774)             elif isinstance(param, StorageManagementOption):
1775)                 group = StorageManagementOption

1776)             elif isinstance(param, LoggingOption):
1777)                 group = LoggingOption

1778)             elif isinstance(param, CompatibilityOption):
1779)                 group = CompatibilityOption

1780)             elif isinstance(param, OptionGroupOption):
1781)                 raise AssertionError(  # noqa: DOC501,TRY003,TRY004
1782)                     f'Unknown option group for {param!r}'  # noqa: EM102
1783)                 )
1784)             else:
1785)                 group = click.Option

1786)             options_in_group.setdefault(group, []).append(param)
1787)         params_by_str[param.human_readable_name] = param
1788)         for name in param.opts + param.secondary_opts:
1789)             params_by_str[name] = param
1790) 

1791)     def is_param_set(param: click.Parameter) -> bool:

1792)         return bool(ctx.params.get(param.human_readable_name))
1793) 

1794)     def check_incompatible_options(

1795)         param: click.Parameter | str,
1796)         *incompatible: click.Parameter | str,

1797)     ) -> None:

1798)         if isinstance(param, str):
1799)             param = params_by_str[param]
1800)         assert isinstance(param, click.Parameter)
1801)         if not is_param_set(param):

1802)             return
1803)         for other in incompatible:

1804)             if isinstance(other, str):

1805)                 other = params_by_str[other]  # noqa: PLW2901

1806)             assert isinstance(other, click.Parameter)
1807)             if other != param and is_param_set(other):
1808)                 opt_str = param.opts[0]
1809)                 other_str = other.opts[0]
1810)                 raise click.BadOptionUsage(

1811)                     opt_str, f'mutually exclusive with {other_str}', ctx=ctx
1812)                 )

1813) 

1814)     def err(msg: Any, *args: Any, **kwargs: Any) -> NoReturn:  # noqa: ANN401
1815)         stacklevel = kwargs.pop('stacklevel', 1)
1816)         stacklevel += 1
1817)         logger.error(msg, *args, stacklevel=stacklevel, **kwargs)

1818)         ctx.exit(1)
1819) 

1820)     def get_config() -> _types.VaultConfig:

1821)         try:
1822)             return _load_config()
1823)         except FileNotFoundError:

1824)             try:
1825)                 backup_config, exc = _migrate_and_load_old_config()
1826)             except FileNotFoundError:
1827)                 return {'services': {}}

1828)             old_name = os.path.basename(
1829)                 _config_filename(subsystem='old settings.json')
1830)             )

1831)             new_name = os.path.basename(_config_filename(subsystem='vault'))

1832)             deprecation.warning(

1833)                 (

1834)                     'Using deprecated v0.1-style config file %r, '
1835)                     'instead of v0.2-style %r.  '
1836)                     'Support for v0.1-style config filenames will be '
1837)                     'removed in v1.0.'

1838)                 ),

1839)                 old_name,
1840)                 new_name,

1841)             )
1842)             if isinstance(exc, OSError):

1843)                 logger.warning(
1844)                     'Failed to migrate to %r: %s: %r',
1845)                     new_name,
1846)                     exc.strerror,
1847)                     exc.filename,

1848)                 )
1849)             else:

1850)                 deprecation.info('Successfully migrated to %r.', new_name)

1851)             return backup_config

1852)         except OSError as e:

1853)             err('Cannot load config: %s: %r', e.strerror, e.filename)

1854)         except Exception as e:  # noqa: BLE001

1855)             err('Cannot load config: %s', str(e), exc_info=e)

1856) 
1857)     def put_config(config: _types.VaultConfig, /) -> None:
1858)         try:
1859)             _save_config(config)

1860)         except OSError as exc:

1861)             err('Cannot store config: %s: %r', exc.strerror, exc.filename)

1862)         except Exception as exc:  # noqa: BLE001

1863)             err('Cannot store config: %s', str(exc), exc_info=exc)

1864) 

1865)     def get_user_config() -> dict[str, Any]:
1866)         try:
1867)             return _load_user_config()
1868)         except FileNotFoundError:
1869)             return {}
1870)         except OSError as e:
1871)             err('Cannot load user config: %s: %r', e.strerror, e.filename)
1872)         except Exception as e:  # noqa: BLE001
1873)             err('Cannot load user config: %s', str(e), exc_info=e)
1874) 

1875)     configuration: _types.VaultConfig

1876) 
1877)     check_incompatible_options('--phrase', '--key')

1878)     for group in (ConfigurationOption, StorageManagementOption):

1879)         for opt in options_in_group[group]:
1880)             if opt != params_by_str['--config']:
1881)                 check_incompatible_options(

1882)                     opt, *options_in_group[PasswordGenerationOption]
1883)                 )

1884) 

1885)     for group in (ConfigurationOption, StorageManagementOption):

1886)         for opt in options_in_group[group]:
1887)             check_incompatible_options(

1888)                 opt,
1889)                 *options_in_group[ConfigurationOption],
1890)                 *options_in_group[StorageManagementOption],
1891)             )

1892)     sv_or_global_options = options_in_group[PasswordGenerationOption]
1893)     for param in sv_or_global_options:

1894)         if is_param_set(param) and not (
1895)             service or is_param_set(params_by_str['--config'])

1896)         ):
1897)             opt_str = param.opts[0]

1898)             msg = f'{opt_str} requires a SERVICE or --config'

1899)             raise click.UsageError(msg)  # noqa: DOC501
1900)     sv_options = [params_by_str['--notes'], params_by_str['--delete']]
1901)     for param in sv_options:
1902)         if is_param_set(param) and not service:
1903)             opt_str = param.opts[0]
1904)             msg = f'{opt_str} requires a SERVICE'

1905)             raise click.UsageError(msg)

1906)     no_sv_options = [
1907)         params_by_str['--delete-globals'],
1908)         params_by_str['--clear'],
1909)         *options_in_group[StorageManagementOption],
1910)     ]

1911)     for param in no_sv_options:
1912)         if is_param_set(param) and service:
1913)             opt_str = param.opts[0]

1914)             msg = f'{opt_str} does not take a SERVICE argument'
1915)             raise click.UsageError(msg)

1916) 

1917)     user_config = get_user_config()
1918) 

1919)     if service == '':  # noqa: PLC1901

1920)         logger.warning(
1921)             'An empty SERVICE is not supported by vault(1).  '
1922)             'For compatibility, this will be treated as if SERVICE '
1923)             'was not supplied, i.e., it will error out, or '
1924)             'operate on global settings.'

1925)         )
1926) 

1927)     if edit_notes:
1928)         assert service is not None
1929)         configuration = get_config()

1930)         text = DEFAULT_NOTES_TEMPLATE + configuration['services'].get(

1931)             service, cast(_types.VaultConfigServicesSettings, {})

1932)         ).get('notes', '')

1933)         notes_value = click.edit(text=text)
1934)         if notes_value is not None:

1935)             notes_lines = collections.deque(notes_value.splitlines(True))  # noqa: FBT003

1936)             while notes_lines:
1937)                 line = notes_lines.popleft()
1938)                 if line.startswith(DEFAULT_NOTES_MARKER):
1939)                     notes_value = ''.join(notes_lines)
1940)                     break
1941)             else:
1942)                 if not notes_value.strip():

1943)                     err('Not saving new notes: user aborted request')

1944)             configuration['services'].setdefault(service, {})['notes'] = (

1945)                 notes_value.strip('\n')
1946)             )

1947)             put_config(configuration)

1948)     elif delete_service_settings:
1949)         assert service is not None
1950)         configuration = get_config()
1951)         if service in configuration['services']:
1952)             del configuration['services'][service]

1953)             put_config(configuration)

1954)     elif delete_globals:
1955)         configuration = get_config()
1956)         if 'global' in configuration:
1957)             del configuration['global']

1958)             put_config(configuration)

1959)     elif clear_all_settings:

1960)         put_config({'services': {}})

1961)     elif import_settings:
1962)         try:

1963)             # TODO(the-13th-letter): keep track of auto-close; try
1964)             # os.dup if feasible

1965)             infile = (
1966)                 cast(TextIO, import_settings)
1967)                 if hasattr(import_settings, 'close')
1968)                 else click.open_file(os.fspath(import_settings), 'rt')
1969)             )

1970)             with infile:
1971)                 maybe_config = json.load(infile)
1972)         except json.JSONDecodeError as e:

1973)             err('Cannot load config: cannot decode JSON: %s', e)

1974)         except OSError as e:

1975)             err('Cannot load config: %s: %r', e.strerror, e.filename)

1976)         cleaned = _types.clean_up_falsy_vault_config_values(maybe_config)
1977)         if not _types.is_vault_config(maybe_config):

1978)             err('Cannot load config: %s', _INVALID_VAULT_CONFIG)

1979)         assert cleaned is not None
1980)         for step in cleaned:
1981)             # These are never fatal errors, because the semantics of
1982)             # vault upon encountering these settings are ill-specified,
1983)             # but not ill-defined.
1984)             if step.action == 'replace':

1985)                 logger.warning(
1986)                     'Replacing invalid value %s for key %s with %s.',
1987)                     json.dumps(step.old_value),
1988)                     _types.json_path(step.path),
1989)                     json.dumps(step.new_value),

1990)                 )
1991)             else:

1992)                 logger.warning(
1993)                     'Removing ineffective setting %s = %s.',
1994)                     _types.json_path(step.path),
1995)                     json.dumps(step.old_value),

1996)                 )

1997)         if '' in maybe_config['services']:

1998)             logger.warning(
1999)                 (
2000)                     'An empty SERVICE is not supported by vault(1), '
2001)                     'and the empty-string service settings will be '
2002)                     'inaccessible and ineffective.  To ensure that '
2003)                     'vault(1) and %s see the settings, move them '
2004)                     'into the "global" section.'
2005)                 ),
2006)                 PROG_NAME,

2007)             )

2008)         try:

2009)             _check_for_misleading_passphrase(

2010)                 ('global',),
2011)                 cast(dict[str, Any], maybe_config.get('global', {})),
2012)                 main_config=user_config,

2013)             )

2014)             for key, value in maybe_config['services'].items():
2015)                 _check_for_misleading_passphrase(
2016)                     ('services', key),
2017)                     cast(dict[str, Any], value),
2018)                     main_config=user_config,
2019)                 )
2020)         except AssertionError as e:
2021)             err('The configuration file is invalid.  ' + str(e))

2022)         if overwrite_config:
2023)             put_config(maybe_config)
2024)         else:
2025)             configuration = get_config()
2026)             merged_config: collections.ChainMap[str, Any] = (
2027)                 collections.ChainMap(
2028)                     {
2029)                         'services': collections.ChainMap(
2030)                             maybe_config['services'],
2031)                             configuration['services'],
2032)                         ),
2033)                     },
2034)                     {'global': maybe_config['global']}
2035)                     if 'global' in maybe_config
2036)                     else {},
2037)                     {'global': configuration['global']}
2038)                     if 'global' in configuration
2039)                     else {},
2040)                 )
2041)             )
2042)             new_config: Any = {
2043)                 k: dict(v) if isinstance(v, collections.ChainMap) else v
2044)                 for k, v in sorted(merged_config.items())
2045)             }
2046)             assert _types.is_vault_config(new_config)
2047)             put_config(new_config)

2048)     elif export_settings:
2049)         configuration = get_config()
2050)         try:

2051)             # TODO(the-13th-letter): keep track of auto-close; try
2052)             # os.dup if feasible

2053)             outfile = (
2054)                 cast(TextIO, export_settings)
2055)                 if hasattr(export_settings, 'close')
2056)                 else click.open_file(os.fspath(export_settings), 'wt')
2057)             )

2058)             with outfile:
2059)                 json.dump(configuration, outfile)
2060)         except OSError as e:

2061)             err('Cannot store config: %s: %r', e.strerror, e.filename)

2062)     else:
2063)         configuration = get_config()
2064)         # This block could be type checked more stringently, but this
2065)         # would probably involve a lot of code repetition.  Since we
2066)         # have a type guarding function anyway, assert that we didn't
2067)         # make any mistakes at the end instead.
2068)         global_keys = {'key', 'phrase'}

2069)         service_keys = {
2070)             'key',
2071)             'phrase',
2072)             'length',
2073)             'repeat',
2074)             'lower',
2075)             'upper',
2076)             'number',
2077)             'space',
2078)             'dash',
2079)             'symbol',
2080)         }

2081)         settings: collections.ChainMap[str, Any] = collections.ChainMap(

2082)             {
2083)                 k: v
2084)                 for k, v in locals().items()
2085)                 if k in service_keys and v is not None
2086)             },
2087)             cast(
2088)                 dict[str, Any],
2089)                 configuration['services'].get(service or '', {}),
2090)             ),
2091)             cast(dict[str, Any], configuration.get('global', {})),

2092)         )
2093)         if use_key:
2094)             try:

2095)                 key = base64.standard_b64encode(_select_ssh_key()).decode(
2096)                     'ASCII'
2097)                 )

2098)             except IndexError:

2099)                 err('No valid SSH key selected')

2100)             except KeyError:

2101)                 err('Cannot find running SSH agent; check SSH_AUTH_SOCK')

2102)             except NotImplementedError:
2103)                 err(
2104)                     'Cannot connect to SSH agent because '
2105)                     'this Python version does not support UNIX domain sockets'
2106)                 )

2107)             except OSError as e:

2108)                 err('Cannot connect to SSH agent: %s', e.strerror)

2109)             except (
2110)                 LookupError,
2111)                 RuntimeError,
2112)                 ssh_agent.SSHAgentFailedError,
2113)             ) as e:

2114)                 err(str(e))

2115)         elif use_phrase:
2116)             maybe_phrase = _prompt_for_passphrase()
2117)             if not maybe_phrase:

2118)                 err('No passphrase given')

2119)             else:
2120)                 phrase = maybe_phrase
2121)         if store_config_only:
2122)             view: collections.ChainMap[str, Any]

2123)             view = (
2124)                 collections.ChainMap(*settings.maps[:2])
2125)                 if service

2126)                 else collections.ChainMap(settings.maps[0], settings.maps[2])

2127)             )

2128)             if use_key:
2129)                 view['key'] = key
2130)             elif use_phrase:

2131)                 view['phrase'] = phrase
2132)                 settings_type = 'service' if service else 'global'

2133)                 try:
2134)                     _check_for_misleading_passphrase(
2135)                         ('services', service) if service else ('global',),
2136)                         {'phrase': phrase},
2137)                         main_config=user_config,
2138)                     )
2139)                 except AssertionError as e:
2140)                     err('The configuration file is invalid.  ' + str(e))

2141)                 if 'key' in settings:

2142)                     logger.warning(
2143)                         (
2144)                             'Setting a %s passphrase is ineffective '
2145)                             'because a key is also set.'
2146)                         ),
2147)                         settings_type,

2148)                     )

2149)             if not view.maps[0]:
2150)                 settings_type = 'service' if service else 'global'

2151)                 msg = (

2152)                     f'Cannot update {settings_type} settings without '

2153)                     f'actual settings'
2154)                 )

2155)                 raise click.UsageError(msg)

2156)             subtree: dict[str, Any] = (
2157)                 configuration['services'].setdefault(service, {})  # type: ignore[assignment]
2158)                 if service
2159)                 else configuration.setdefault('global', {})
2160)             )
2161)             if overwrite_config:
2162)                 subtree.clear()
2163)             subtree.update(view)

2164)             assert _types.is_vault_config(

2165)                 configuration

2166)             ), f'Invalid vault configuration: {configuration!r}'

2167)             put_config(configuration)

2168)         else:
2169)             if not service:

2170)                 msg = 'SERVICE is required'
2171)                 raise click.UsageError(msg)

2172)             kwargs: dict[str, Any] = {
2173)                 k: v
2174)                 for k, v in settings.items()
2175)                 if k in service_keys and v is not None
2176)             }
2177) 

2178)             if use_phrase:

2179)                 try:
2180)                     _check_for_misleading_passphrase(
2181)                         _ORIGIN.INTERACTIVE,
2182)                         {'phrase': phrase},
2183)                         main_config=user_config,
2184)                     )
2185)                 except AssertionError as e:
2186)                     err('The configuration file is invalid.  ' + str(e))

2187) 

2188)             # If either --key or --phrase are given, use that setting.
2189)             # Otherwise, if both key and phrase are set in the config,

2190)             # use the key.  Otherwise, if only one of key and phrase is
2191)             # set in the config, use that one.  In all these above
2192)             # cases, set the phrase via vault.Vault.phrase_from_key if
2193)             # a key is given.  Finally, if nothing is set, error out.

2194)             if use_key or use_phrase:

2195)                 kwargs['phrase'] = _key_to_phrase(
2196)                     key, error_callback=err
2197)                 ) if use_key else phrase

2198)             elif kwargs.get('key'):

2199)                 kwargs['phrase'] = _key_to_phrase(
2200)                     kwargs['key'], error_callback=err
2201)                 )

2202)             elif kwargs.get('phrase'):
2203)                 pass
2204)             else:

2205)                 msg = (

2206)                     'No passphrase or key given on command-line '

2207)                     'or in configuration'
2208)                 )

2209)                 raise click.UsageError(msg)

2210)             kwargs.pop('key', '')

2211)             result = vault.Vault(**kwargs).generate(service)

2212)             click.echo(result.decode('ASCII'))