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With the required interface for secrets well defined, this change
introduces a second secret type in addition to PINs: passwords. Similar
to a PIN, a password can contain pretty arbitrary characters but
passwords can be retried repeatedly, whereas PINs cause a lockout after
a certain number of failed attempts.
Our first use case for passwords will be for hidden volumes. For those,
we do not want to gpg-agent to cache entries and so a password entry
indicates that it is not to be cached through the previously introduced
mechanism for optional caching.
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Another commonality between a password and a PIN is that they typically
both have a minimum length.
To accommodate for this requirement, this change introduces another
method to the SecretEntry trait that represents the secret's minimum
character length.
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Currently, when we enter a secret (i.e., a PIN) through the pinentry
module, this PIN will automatically be cached and not asked from the
user again on subsequent inquiries. However, caching may not always be
desired. For the upcoming support of passwords used in conjunction with
hidden volumes, we do not want any caching because different passwords
can be entered for different volumes and the user's intention is not
clear until a password has actually been entered.
To accommodate this use case, this change modifies the signature of the
SecretEntry trait's cache_id method to return an optional cache ID. If
none is returned, caching of the entered secret is disabled.
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We do not know what kind of data future implementers of the SecretEntry
trait may want to return. For all we know these could just be static
strings, in which case the forced conversion into a String by virtue of
the return type is wasteful.
To be more flexible in the future while gaining some consistency, this
change makes all those trait's methods return a Cow object instead.
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Now that we have introduced the notion of a secret abstracting over
whether something is a PIN or a password in terms of terminology, we
need to define what makes a secret in code. From the pinentry module's
perspective, the commonality between the two is that they both can be
entered through a dialog containing a prompt and a description, and they
can be cached.
This change introduces a trait, SecretEntry, that defines methods
representing those properties. Right now only the existing PinEntry
struct implements this trait.
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In the past we have worked solely with PINs. PINs in our (or rather, the
Nitrokey's) sense are not necessarily numbers but they can be reasonably
short in length, because they can only be retried a limited number of
times.
In the future, however, we will introduce the notion of a password,
which does not carry such a restriction.
The commonality between the two is that they are secrets and so with
this change we refer to secrets -- rather than PINs -- in places where
both passwords and PINs can conceptually be used.
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Various functions in the pinentry module contain an arguably redundant
'_pin' suffix in their name. Examples include inquire_pin and clear_pin.
This change removes this part from their names.
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The functionality we have in place for choosing a PIN can arguably be
moved into the pinentry module: it can be considered logic directly
related to working with PINs or secrets and that has no dependencies to
unrelated modules of the program.
This patch moves the choose_pin and check_pin functions into the
pinentry module.
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This change adds two tests for the storage command. The first one
verifies that a proper error message is emitted if a storage command is
attempted on a Pro device. The second one checks the output of the
status subcommand and expected changes to it when opening or closing the
encrypted volume.
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This change adds a set of tests for the pws command. Covered are all
subcommands with the most commonly used parameter combinations.
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The previous change to properly format the help text for optional
arguments left one thing out: parameters that are based on an Option as
opposed to an enum. The problem with those is that we cannot simply ask
the value (i.e., the Option) for all the variants of the inner type.
Instead, we have to reference the actual type of the inner enum in order
to retrieve all its possible variants.
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This change continues the effort of auto-generating more of the help
text content by extending the logic to optional arguments. We make use
of the fmt_enum macro to format the description of the argument with the
available variants (as well as the default, if any) interpolated.
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With the ability to fully generate the command enums we use for working
with the argparse crate, we can now take things one step further and
populate the contents of the help string we print for the user that
lists the available commands.
Doing so we also fix a bug where we forgot to mention the "storage
status" command in the help text.
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Not too long ago we added a macro to auto generate the command enums and
the required trait implementations from a concise declarative
representation. This change extends this mechanism to the execute method
implementation that some of those enums provide.
When a tuple is specified as the "destination", e.g., here:
> Enum! {ConfigCommand, [
> Get => ("get", config_get),
> Set => ("set", config_set)
> ]}
the second component of this tuple will be interpreted as the function
to invoke when this variant used in the newly generated execute method.
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We have been loosely tracking the resulting size of the stripped release
binary as that is arguably the most relevant metric to optimize for. To
have a better idea of the influence of various changes and their effect
on the binary size, this change adds a script that automates the process
of gathering this metric. E.g.,
$ var/binary-size.py HEAD~3 HEAD --unit kib
> 994
> 970
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With the update to rand 0.6.4 we no longer require the dependencies to
rustc_version, semver, and semver-parser. Hence, this change removes
them.
Delete subrepo rustc_version/:rustc_version
Delete subrepo semver/:semver
Delete subrepo semver-parser/:semver-parser
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This change updates the nitrokey crate to version 0.3.3. Along with that
change we update rand to 0.6.4 because rand 0.6.1 does not yet contain a
publicly accessible rand_os. Note that we no longer require all
crates in rand's workspace, but only rand_os and rand_core, which is a
significant reduction in the number of lines of code compiled.
Import subrepo nitrokey/:nitrokey at 7cf747d56ddc0b7eeedc3caf36dcc909907a171c
Import subrepo rand/:rand at 4336232dda03323634b10ec72ddf27914aebc3a2
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This change adds a set of tests for the config get and set commands. We
cover chosen valid parameter combinations and verify that they work as
expected as well as an invalid one.
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This change adds a set of tests for the otp command. We cover some
variants of the status, set, get, and clear. Testing all the possible
combinations is out of scope and so only a more or less arbitrary subset
of arguments was chosen.
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This change updates the libc crate to version 0.2.46.
Import subrepo libc/:libc at a9e3cc6c1b529eaffef5b82934d0c47203edebe5
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Cargo uses SPDX 2.1 license identifiers. The identifier GPL-3.0+ is
deprecated as of version 2.0rc2 [0]. The current license identifier for GNU
General Public License v3.0 or later is GPL-3.0-or-later [1].
[0] https://spdx.org/licenses/GPL-3.0+.html
[1] https://spdx.org/licenses/GPL-3.0-or-later.html
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This change adds a new section briefly elaborating on the problem of
using the program on macOS and details a possible solution.
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This change updates the nitrokey crate to version 0.3.2.
Import subrepo nitrokey/:nitrokey at 6ea73f29daa5db0215663a0a38334b764863671d
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This change updates the nitrokey-sys crate to version 3.4.3.
Import subrepo nitrokey-sys/:nitrokey-sys at fe86df47853718983e1f45d6a4289a1d93ace45c
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The nitrokey-sys crate poses a challenge in that upgrading it causes
build errors caused by linking against the system's nitrokey library
from multiple crates, which is not allowed. The exact cause of the
problem is unclear but the suspicion is that a bug in Cargo's replacing
logic is the cause of the issue.
To work around this problem, this change switches to using the [patch]
section for replacing crates with local copies instead of the [replace]
one.
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With the first usage of the nitrokey crate we have used the dependency's
path attribute to perform the replacement with a local version of the
source code, while most other dependencies are replaced using the
[replace] section.
Because the [replace] section is more flexible (it allows for
replacement of transitive dependencies), this change unifies all
dependencies to use it.
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We exit the program using the process::exit function. This function just
exits the program directly, without any cleanup. That can be a problem
because IO buffers may not be flushed either. For a (typically) line
buffered entity like stdout that may result in data not terminated by a
newline symbol being not displayed properly.
This change explicitly flushes stdout before exiting the process to
alleviate this problem. Note that stderr output is unaffected, because
stderr is not buffered by design.
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The application supports multiple devices both plugged in at the same
time as well as when used after the other. However, the GPG cache ID we
use for storing and retrieving the respective PIN is effectively a
constant. This constraint can cause problems when devices have different
PINs, as the PIN of a previously plugged in device may be reused for an
operation on a different one.
To resolve this problem this change adds the respective device's model
and serial number to the cache ID. As each serial number is supposed to
be different, this will ensure that the correct PIN is used for each
device. With this change we also show the model and serial number of the
currently used device in the pinentry dialog.
Note that because we do not store the serial numbers of all previously
plugged in devices, the pin clear command will only clear the PIN for
the currently plugged in device. If a user wants to make sure that a
cached PIN is cleared, the pin clear command should be invoked before
unplugging the device.
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The implementation of the fmt::Display trait for the PinType is
seemingly unused. Remove it.
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This patch implements From<&str> for Error so that we can use
Error::from(s) as a shorthand for Error::Error(s.to_string()). It also
replaces Error::Error with Error::from where possible.
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nitrokey 0.3.1 introduced the connect_model function that connects to a
specific model given by an enum variant and returns a DeviceWrapper.
This new function allows us to remove the manual selection of a
connection method from the get_device function. We only have to
implement From<DeviceModel> for nitrokey::Model to be able to convert
our model enum to nitrokey's model enum.
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In the past we have already taken a couple of steps to reduce the size
of the final binary, arguing that binary size is the metric of most
relevance for the program at hand:
- the memory footprint is close to irrelevant because the program does
not stay resident in memory for long
- execution speed is likely dominated by communication with the Nitrokey
itself, which is a slow I/O device
With that in mind, this change decreases the binary size further by
swapping the default allocator we use (typically jemalloc) with the
system allocator (which is malloc based on Unix systems). Given that we
are by no means allocation sensitive, there is no point in wasting
binary size on something that adds no value.
This change decreases the binary size by another 324 KiB (for an already
stripped release mode binary).
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This change bumps the version of the crate to 0.2.2. The following
notable changes have been made since 0.2.1:
- Added the -v/--verbose option to control libnitrokey log level
- Added the -m/--model option to restrict connections to a device
model
- Added the -f/--format option for the otp set subcommand to
choose the secret format
- Deprecated the --ascii option
- Honor NITROCLI_ADMIN_PIN and NITROCLI_USER_PIN as well as
NITROCLI_NEW_ADMIN_PIN and NITROCLI_NEW_USER_PIN environment
variables for non-interactive PIN supply
- Format nitrokey reported errors in more user-friendly format
- Bumped nitrokey dependency to 0.3.1
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The command detailed in the PIN section in the man page exhibit a larger
line spacing than all the other commands documented. The reason is that
we have an addition newline between each of the individual subcommands
in this section.
This patch removes this additional newline to achieve a more consistent
appearance.
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So far we have taken all nitrokey::CommandError objects and put them in
formatted form into the Error::Error variant. What we really should do,
though, is to preserve the original error, with the additional context
provided by the caller, and report that up the stack directly. Doing so
has at least the benefit that we are able to check for expected errors
without hard coding the textual representation as maintained by the
nitrokey create.
This change refactors the code accordingly and adds two tests for such
expected error codes.
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Now that we have the infrastructure for non-interactive PIN supply in
place, we can add tests for commands that require the entry of a PIN.
To that end, this change adds tests for the pin set as well as pin
unblock commands.
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The second source of interactivity comes from the pin set and pin
unblock commands, which also inquire with the pinentry module to ask the
user for a PIN.
This change adjusts the two commands to honor the PINs as available in
the command execution context. It also updates the documentation
to reflect the availability of the newly introduced and honored
environment variables NITROCLI_ADMIN_PIN & NITROCLI_USER_PIN as well as
NITROCLI_NEW_ADMIN_PIN & NITROCLI_NEW_USER_PIN.
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The try_with_pin_and_data function is used by many commands to ask the
user for a PIN in an interactive manner. Because we do not want to have
any interactivity in our tests, we should honor the command execution's
admin & user PIN fields from this function, if set.
This change adjusts the function to honor the command execution
context's admin & user PIN, if set. In order to do so it also adjusts
the callers to hand through the context to begin with.
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In order to run tests fully non-interactively we need to avoid the need
for using the GPG agent's PIN entry and caching mechanism. To accomplish
that, we first need an alternate way to supply the PINs to use to the
program.
This change offers such a way by extending the execution context with
two fields representing the PINs that are populated by corresponding
environment variables, NITROCLI_ADMIN_PIN & NITROCLI_USER_PIN, if set.
While only two PINs are required right now, because the program allows
for the changing of each of the PINs, we also add two fields
representing new PINs. These latter two fields are populated by the
NITROCLI_NEW_ADMIN_PIN and NITROCLI_NEW_USER_PIN environment variables.
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In the future we will need to perform a sequence of invocations of the
program for testing purposes, with each having a slightly different
execution context. Such a scheme does not map very well to the existing
design where we essentially just have a function invocation to run the
program. We would either have functions that produce a different
execution context or pass in the data to modify.
Neither of these approaches is appealing and so this change reworks the
code slightly. With it, we now can create a Nitrocli object, which
contains the data that diverges from the default execution context. This
data will eventually be modifiable by callers.
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The try_with_pin_and_data function is a fairly complex beast. Part of
that complexity stems from the returned Result value, whose error part
not only contains the error but also the previously passed in data. As
it turns out, though, this data as returned is never actually consumed
by any client.
Hence, this change simplifies the logic slightly by removing all the
additional complexity that this tuple return entailed.
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The inquire_pin function of the pinentry module used to return a vector
of bytes, as that is what is ultimately read from the gpg-agent process.
All clients of this function, however, work with a string and, hence,
convert this vector into a string.
As it turns out, for better or worse, the pinentry::parse_pinentry_pin
function (which produces the result of inquire_pin) internally already
works with a string but then converts it back. That is both not useful
and a waste of resources.
This change adjusts both functions of interest to simply return a String
object instead, removing the need for conversions at the clients. While
at it, the patch also removes the need for a bunch of unnecessary
allocations caused by sub-par parameter type choice.
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In the past we have used the term 'passphrase' to refer to the data
retrieved through the pinentry module and that terminology has permeated
the commands module as well.
However, on the Nitrokey side we talk about PINs most of the time
(despite a lack of an requirement for being actual numbers). In an
attempt to unify terminology a bit more, this change renames all
occurrences of the term 'passphrase' with PIN. This renaming has the
nice side effect of making the code more concise because the latter is
much shorter than the former.
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For testing purposes it is beneficial to be able to check for expected
errors with the least amount of boiler plate code possible. This change
attempts to be a first step into this direction. It introduces a
test-only trait that can be used to directly unwrap a specific error
from a Result<T, crate::error::Error>.
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At some point in the past nitrokey::CommandError was lacking an
implementation of the fmt::Display trait. Hence, we fell back to
printing these errors in debug format.
Since version 0.2.0 of the crate fmt::Display is implemented for these
errors. With this change we use it to report more user-friendly error
messages.
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This change updates the nitrokey crate to version 0.3.1.
Import subrepo nitrokey/:nitrokey at bad12ad3c57c67d42243338af7d65c3591fed327
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The help text for the otp set -a/--algorithm option is lacking the
closing parenthesis in the help text. This change adds it.
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The argparse module we use for parsing events expects an enum in order
to convey what subcommand has been supplied as an argument. Such an enum
also needs to implement str::FromStr and, preferably, fmt::Display.
Manually writing down those definitions is error-prone, tedious, and
adds no value -- only lines of code.
As it turns out the proper definitions can be generated with relative
easy with a declarative macro, making the code much more concise. Hence,
with this change we use a newly introduced macro for generating those
enums.
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Upon creation of a release on Github, the platform publishes the source
code. It is good practice to sign this source code, but it obviously
should be verified first. The procedure is not quite as trivial as it
should be and tedious to do manually.
To aid the process, this change adds a Makefile recipe that contains the
core logic and guides the user through the steps that are necessary.
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This change introduces the first set of integration-style test for the
application. Those tests may or may not connect to an actual Nitrokey
device (depending on what they test). We use the nitrokey-test crate's
test attribute macro to automatically dispatch tests to connected
devices or skip them if a required device is not present. It also
provides the means for automatically serializing tests.
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