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do all the things

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Leon Henrik Plickat 2022-09-17 08:41:54 +02:00
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zig-out/
zig-cache/
pinentry-wayprompt

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[submodule "deps/zig-wayland"]
path = deps/zig-wayland
url = https://github.com/ifreund/zig-wayland/
[submodule "deps/zig-pixman"]
path = deps/zig-pixman
url = https://github.com/ifreund/zig-pixman.git
[submodule "deps/zig-xkbcommon"]
path = deps/zig-xkbcommon
url = https://github.com/ifreund/zig-xkbcommon

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parts of the General Public License. Of course, your program's commands
might be different; for a GUI interface, you would use an "about box".
You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU GPL, see
<https://www.gnu.org/licenses/>.
The GNU General Public License does not permit incorporating your program
into proprietary programs. If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
<https://www.gnu.org/licenses/why-not-lgpl.html>.

8
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wayprompt - multi-purpose prompt tool for Wayland
To use as a pinentry replacement, run as 'pinentry-wayprompt'.
To use as a himitsu prompter, run as 'hiprompt-wayprompt'. (TODO)
To use as a generic prompter for scripts, run as 'wayprompt-cli'. (TODO)
Requires the compositor to support the layershell.
Dependes on lib-wayland, xkbcommon and pixman.

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const std = @import("std");
const zbs = std.build;
const mem = std.mem;
const ascii = std.ascii;
const fmt = std.fmt;
const ScanProtocolsStep = @import("deps/zig-wayland/build.zig").ScanProtocolsStep;
pub fn build(b: *zbs.Builder) !void {
const target = b.standardTargetOptions(.{});
const mode = b.standardReleaseOptions();
const options = b.addOptions();
const scanner = ScanProtocolsStep.create(b);
scanner.addProtocolPath("protocol/wlr-layer-shell-unstable-v1.xml");
scanner.addSystemProtocol("stable/xdg-shell/xdg-shell.xml");
scanner.generate("wl_compositor", 5);
scanner.generate("wl_shm", 1);
scanner.generate("zwlr_layer_shell_v1", 4);
scanner.generate("xdg_wm_base", 5); // Needed as a dependency of the layershell.
scanner.generate("wl_seat", 8);
scanner.generate("wl_output", 4);
const wayprompt = b.addExecutable("wayprompt", "src/wayprompt.zig");
wayprompt.setTarget(target);
wayprompt.setBuildMode(mode);
wayprompt.addOptions("build_options", options);
wayprompt.addPackagePath("pixman", "deps/zig-pixman/pixman.zig");
wayprompt.linkSystemLibrary("pixman-1");
wayprompt.addPackagePath("xkbcommon", "deps/zig-xkbcommon/src/xkbcommon.zig");
wayprompt.linkSystemLibrary("xkbcommon");
wayprompt.step.dependOn(&scanner.step);
wayprompt.addPackage(.{
.name = "wayland",
.path = .{ .generated = &scanner.result },
});
wayprompt.linkLibC();
wayprompt.linkSystemLibrary("wayland-client");
scanner.addCSource(wayprompt);
wayprompt.install();
}

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deps/zig-pixman vendored Submodule

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Subproject commit d381567de9b6e40dd7f4c6e0b5740f94ebd8c9d7

1
deps/zig-xkbcommon vendored Submodule

@ -0,0 +1 @@
Subproject commit c97f8e18dddda04414067cf8fbfdaa7682dcb44a

390
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<?xml version="1.0" encoding="UTF-8"?>
<protocol name="wlr_layer_shell_unstable_v1">
<copyright>
Copyright © 2017 Drew DeVault
Permission to use, copy, modify, distribute, and sell this
software and its documentation for any purpose is hereby granted
without fee, provided that the above copyright notice appear in
all copies and that both that copyright notice and this permission
notice appear in supporting documentation, and that the name of
the copyright holders not be used in advertising or publicity
pertaining to distribution of the software without specific,
written prior permission. The copyright holders make no
representations about the suitability of this software for any
purpose. It is provided "as is" without express or implied
warranty.
THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
THIS SOFTWARE.
</copyright>
<interface name="zwlr_layer_shell_v1" version="4">
<description summary="create surfaces that are layers of the desktop">
Clients can use this interface to assign the surface_layer role to
wl_surfaces. Such surfaces are assigned to a "layer" of the output and
rendered with a defined z-depth respective to each other. They may also be
anchored to the edges and corners of a screen and specify input handling
semantics. This interface should be suitable for the implementation of
many desktop shell components, and a broad number of other applications
that interact with the desktop.
</description>
<request name="get_layer_surface">
<description summary="create a layer_surface from a surface">
Create a layer surface for an existing surface. This assigns the role of
layer_surface, or raises a protocol error if another role is already
assigned.
Creating a layer surface from a wl_surface which has a buffer attached
or committed is a client error, and any attempts by a client to attach
or manipulate a buffer prior to the first layer_surface.configure call
must also be treated as errors.
After creating a layer_surface object and setting it up, the client
must perform an initial commit without any buffer attached.
The compositor will reply with a layer_surface.configure event.
The client must acknowledge it and is then allowed to attach a buffer
to map the surface.
You may pass NULL for output to allow the compositor to decide which
output to use. Generally this will be the one that the user most
recently interacted with.
Clients can specify a namespace that defines the purpose of the layer
surface.
</description>
<arg name="id" type="new_id" interface="zwlr_layer_surface_v1"/>
<arg name="surface" type="object" interface="wl_surface"/>
<arg name="output" type="object" interface="wl_output" allow-null="true"/>
<arg name="layer" type="uint" enum="layer" summary="layer to add this surface to"/>
<arg name="namespace" type="string" summary="namespace for the layer surface"/>
</request>
<enum name="error">
<entry name="role" value="0" summary="wl_surface has another role"/>
<entry name="invalid_layer" value="1" summary="layer value is invalid"/>
<entry name="already_constructed" value="2" summary="wl_surface has a buffer attached or committed"/>
</enum>
<enum name="layer">
<description summary="available layers for surfaces">
These values indicate which layers a surface can be rendered in. They
are ordered by z depth, bottom-most first. Traditional shell surfaces
will typically be rendered between the bottom and top layers.
Fullscreen shell surfaces are typically rendered at the top layer.
Multiple surfaces can share a single layer, and ordering within a
single layer is undefined.
</description>
<entry name="background" value="0"/>
<entry name="bottom" value="1"/>
<entry name="top" value="2"/>
<entry name="overlay" value="3"/>
</enum>
<!-- Version 3 additions -->
<request name="destroy" type="destructor" since="3">
<description summary="destroy the layer_shell object">
This request indicates that the client will not use the layer_shell
object any more. Objects that have been created through this instance
are not affected.
</description>
</request>
</interface>
<interface name="zwlr_layer_surface_v1" version="4">
<description summary="layer metadata interface">
An interface that may be implemented by a wl_surface, for surfaces that
are designed to be rendered as a layer of a stacked desktop-like
environment.
Layer surface state (layer, size, anchor, exclusive zone,
margin, interactivity) is double-buffered, and will be applied at the
time wl_surface.commit of the corresponding wl_surface is called.
Attaching a null buffer to a layer surface unmaps it.
Unmapping a layer_surface means that the surface cannot be shown by the
compositor until it is explicitly mapped again. The layer_surface
returns to the state it had right after layer_shell.get_layer_surface.
The client can re-map the surface by performing a commit without any
buffer attached, waiting for a configure event and handling it as usual.
</description>
<request name="set_size">
<description summary="sets the size of the surface">
Sets the size of the surface in surface-local coordinates. The
compositor will display the surface centered with respect to its
anchors.
If you pass 0 for either value, the compositor will assign it and
inform you of the assignment in the configure event. You must set your
anchor to opposite edges in the dimensions you omit; not doing so is a
protocol error. Both values are 0 by default.
Size is double-buffered, see wl_surface.commit.
</description>
<arg name="width" type="uint"/>
<arg name="height" type="uint"/>
</request>
<request name="set_anchor">
<description summary="configures the anchor point of the surface">
Requests that the compositor anchor the surface to the specified edges
and corners. If two orthogonal edges are specified (e.g. 'top' and
'left'), then the anchor point will be the intersection of the edges
(e.g. the top left corner of the output); otherwise the anchor point
will be centered on that edge, or in the center if none is specified.
Anchor is double-buffered, see wl_surface.commit.
</description>
<arg name="anchor" type="uint" enum="anchor"/>
</request>
<request name="set_exclusive_zone">
<description summary="configures the exclusive geometry of this surface">
Requests that the compositor avoids occluding an area with other
surfaces. The compositor's use of this information is
implementation-dependent - do not assume that this region will not
actually be occluded.
A positive value is only meaningful if the surface is anchored to one
edge or an edge and both perpendicular edges. If the surface is not
anchored, anchored to only two perpendicular edges (a corner), anchored
to only two parallel edges or anchored to all edges, a positive value
will be treated the same as zero.
A positive zone is the distance from the edge in surface-local
coordinates to consider exclusive.
Surfaces that do not wish to have an exclusive zone may instead specify
how they should interact with surfaces that do. If set to zero, the
surface indicates that it would like to be moved to avoid occluding
surfaces with a positive exclusive zone. If set to -1, the surface
indicates that it would not like to be moved to accommodate for other
surfaces, and the compositor should extend it all the way to the edges
it is anchored to.
For example, a panel might set its exclusive zone to 10, so that
maximized shell surfaces are not shown on top of it. A notification
might set its exclusive zone to 0, so that it is moved to avoid
occluding the panel, but shell surfaces are shown underneath it. A
wallpaper or lock screen might set their exclusive zone to -1, so that
they stretch below or over the panel.
The default value is 0.
Exclusive zone is double-buffered, see wl_surface.commit.
</description>
<arg name="zone" type="int"/>
</request>
<request name="set_margin">
<description summary="sets a margin from the anchor point">
Requests that the surface be placed some distance away from the anchor
point on the output, in surface-local coordinates. Setting this value
for edges you are not anchored to has no effect.
The exclusive zone includes the margin.
Margin is double-buffered, see wl_surface.commit.
</description>
<arg name="top" type="int"/>
<arg name="right" type="int"/>
<arg name="bottom" type="int"/>
<arg name="left" type="int"/>
</request>
<enum name="keyboard_interactivity">
<description summary="types of keyboard interaction possible for a layer shell surface">
Types of keyboard interaction possible for layer shell surfaces. The
rationale for this is twofold: (1) some applications are not interested
in keyboard events and not allowing them to be focused can improve the
desktop experience; (2) some applications will want to take exclusive
keyboard focus.
</description>
<entry name="none" value="0">
<description summary="no keyboard focus is possible">
This value indicates that this surface is not interested in keyboard
events and the compositor should never assign it the keyboard focus.
This is the default value, set for newly created layer shell surfaces.
This is useful for e.g. desktop widgets that display information or
only have interaction with non-keyboard input devices.
</description>
</entry>
<entry name="exclusive" value="1">
<description summary="request exclusive keyboard focus">
Request exclusive keyboard focus if this surface is above the shell surface layer.
For the top and overlay layers, the seat will always give
exclusive keyboard focus to the top-most layer which has keyboard
interactivity set to exclusive. If this layer contains multiple
surfaces with keyboard interactivity set to exclusive, the compositor
determines the one receiving keyboard events in an implementation-
defined manner. In this case, no guarantee is made when this surface
will receive keyboard focus (if ever).
For the bottom and background layers, the compositor is allowed to use
normal focus semantics.
This setting is mainly intended for applications that need to ensure
they receive all keyboard events, such as a lock screen or a password
prompt.
</description>
</entry>
<entry name="on_demand" value="2" since="4">
<description summary="request regular keyboard focus semantics">
This requests the compositor to allow this surface to be focused and
unfocused by the user in an implementation-defined manner. The user
should be able to unfocus this surface even regardless of the layer
it is on.
Typically, the compositor will want to use its normal mechanism to
manage keyboard focus between layer shell surfaces with this setting
and regular toplevels on the desktop layer (e.g. click to focus).
Nevertheless, it is possible for a compositor to require a special
interaction to focus or unfocus layer shell surfaces (e.g. requiring
a click even if focus follows the mouse normally, or providing a
keybinding to switch focus between layers).
This setting is mainly intended for desktop shell components (e.g.
panels) that allow keyboard interaction. Using this option can allow
implementing a desktop shell that can be fully usable without the
mouse.
</description>
</entry>
</enum>
<request name="set_keyboard_interactivity">
<description summary="requests keyboard events">
Set how keyboard events are delivered to this surface. By default,
layer shell surfaces do not receive keyboard events; this request can
be used to change this.
This setting is inherited by child surfaces set by the get_popup
request.
Layer surfaces receive pointer, touch, and tablet events normally. If
you do not want to receive them, set the input region on your surface
to an empty region.
Keyboard interactivity is double-buffered, see wl_surface.commit.
</description>
<arg name="keyboard_interactivity" type="uint" enum="keyboard_interactivity"/>
</request>
<request name="get_popup">
<description summary="assign this layer_surface as an xdg_popup parent">
This assigns an xdg_popup's parent to this layer_surface. This popup
should have been created via xdg_surface::get_popup with the parent set
to NULL, and this request must be invoked before committing the popup's
initial state.
See the documentation of xdg_popup for more details about what an
xdg_popup is and how it is used.
</description>
<arg name="popup" type="object" interface="xdg_popup"/>
</request>
<request name="ack_configure">
<description summary="ack a configure event">
When a configure event is received, if a client commits the
surface in response to the configure event, then the client
must make an ack_configure request sometime before the commit
request, passing along the serial of the configure event.
If the client receives multiple configure events before it
can respond to one, it only has to ack the last configure event.
A client is not required to commit immediately after sending
an ack_configure request - it may even ack_configure several times
before its next surface commit.
A client may send multiple ack_configure requests before committing, but
only the last request sent before a commit indicates which configure
event the client really is responding to.
</description>
<arg name="serial" type="uint" summary="the serial from the configure event"/>
</request>
<request name="destroy" type="destructor">
<description summary="destroy the layer_surface">
This request destroys the layer surface.
</description>
</request>
<event name="configure">
<description summary="suggest a surface change">
The configure event asks the client to resize its surface.
Clients should arrange their surface for the new states, and then send
an ack_configure request with the serial sent in this configure event at
some point before committing the new surface.
The client is free to dismiss all but the last configure event it
received.
The width and height arguments specify the size of the window in
surface-local coordinates.
The size is a hint, in the sense that the client is free to ignore it if
it doesn't resize, pick a smaller size (to satisfy aspect ratio or
resize in steps of NxM pixels). If the client picks a smaller size and
is anchored to two opposite anchors (e.g. 'top' and 'bottom'), the
surface will be centered on this axis.
If the width or height arguments are zero, it means the client should
decide its own window dimension.
</description>
<arg name="serial" type="uint"/>
<arg name="width" type="uint"/>
<arg name="height" type="uint"/>
</event>
<event name="closed">
<description summary="surface should be closed">
The closed event is sent by the compositor when the surface will no
longer be shown. The output may have been destroyed or the user may
have asked for it to be removed. Further changes to the surface will be
ignored. The client should destroy the resource after receiving this
event, and create a new surface if they so choose.
</description>
</event>
<enum name="error">
<entry name="invalid_surface_state" value="0" summary="provided surface state is invalid"/>
<entry name="invalid_size" value="1" summary="size is invalid"/>
<entry name="invalid_anchor" value="2" summary="anchor bitfield is invalid"/>
<entry name="invalid_keyboard_interactivity" value="3" summary="keyboard interactivity is invalid"/>
</enum>
<enum name="anchor" bitfield="true">
<entry name="top" value="1" summary="the top edge of the anchor rectangle"/>
<entry name="bottom" value="2" summary="the bottom edge of the anchor rectangle"/>
<entry name="left" value="4" summary="the left edge of the anchor rectangle"/>
<entry name="right" value="8" summary="the right edge of the anchor rectangle"/>
</enum>
<!-- Version 2 additions -->
<request name="set_layer" since="2">
<description summary="change the layer of the surface">
Change the layer that the surface is rendered on.
Layer is double-buffered, see wl_surface.commit.
</description>
<arg name="layer" type="uint" enum="zwlr_layer_shell_v1.layer" summary="layer to move this surface to"/>
</request>
</interface>
</protocol>

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const builtin = @import("builtin");
const std = @import("std");
const ascii = std.ascii;
const mem = std.mem;
const os = std.os;
const io = std.io;
const fs = std.fs;
const wayland = @import("wayland.zig");
const context = &@import("wayprompt.zig").context;
const PinentryConfig = struct {
title: ?[]const u8 = null,
prompt: ?[]const u8 = null,
description: ?[]const u8 = null,
errmessage: ?[]const u8 = null,
// We may not have WAYLAND_DISPLAY in our env when we get started, or maybe even
// a bad one. However the gpg-agent will likely send us its own.
wayland_display: ?[:0]const u8 = null,
pub fn release(self: *PinentryConfig) void {
const alloc = context.gpa.allocator();
if (self.title) |t| {
alloc.free(t);
self.title = null;
}
if (self.prompt) |p| {
alloc.free(p);
self.prompt = null;
}
if (self.description) |d| {
alloc.free(d);
self.description = null;
}
if (self.errmessage) |e| {
alloc.free(e);
self.errmessage = null;
}
if (self.wayland_display) |w| {
alloc.free(w);
self.wayland_display = null;
}
}
};
pub var pinentry_config: PinentryConfig = .{};
pub fn main() !u8 {
defer pinentry_config.release();
const stdout = io.getStdOut();
const stdin = io.getStdIn();
var fds: [1]os.pollfd = undefined;
fds[0] = .{
.fd = stdin.handle,
.events = os.POLL.IN,
.revents = undefined,
};
// Assuan messages are limited to 1000 bytes per spec. However,
// documentation for the pinentry commands states that string can be up to
// 2048 bytes long (it actually says "characters", but I assume bytes is
// what they mean). Since realistically we are the ones sending long strings
// (i.e. passwords with insane lengths), use a small buffer for input and a
// default-sized (2048) buffer for outgoing messages.
var in_buffer: [1024]u8 = undefined;
var out_buffer = io.bufferedWriter(stdout.writer());
try out_buffer.writer().writeAll("OK wayprompt is pleased to meet you\n");
try out_buffer.flush();
while (context.loop) {
_ = try os.poll(&fds, -1);
const read = try stdin.read(&in_buffer);
try parseInput(out_buffer.writer(), in_buffer[0..read]);
try out_buffer.flush();
}
return 0;
}
fn parseInput(writer: io.BufferedWriter(4096, fs.File.Writer).Writer, line: []const u8) !void {
// <rant>
// The protocol spoken between pinentry and the gpg-agent is a mess. It
// uses assuan as the wire protocol (who came up with that name?) which
// itself seems reasonable enough for something going through UNIX pipes,
// but for pinentry it got extended with additional commands. Nothing is
// consistent: Both direct requests as well as arguments to the OPTION
// request are used to set options. A server implementing this protocol
// is apparently not allowed to say it does not implement optional (!)
// requests, no it has to accept them even if it effectively just ignores
// them, despite there actually being a "no this is not implemented"
// response. Speaking of responses, there are just OK and errors. What?
// And errors use the gpg error format, which is ... weird and unwieldy.
// And when it comes to data responses, the pinentry program shipped with
// gpg just sends the "D string" events followed by OK. This actually goes
// against the assuan spec, which states that after the D event you have
// to send an END event before sending OK. And funnily enough, we actually
// have to do that, as the gpg-agent otherwise aborts. But apparently
// the default pinentry program gets away with it somehow? And the
// pinentry protocol documentation also says nothing about END? What?
// This protocol has clearly suffered severely from having only a single
// widely used implementation.
// </rant>
const alloc = context.gpa.allocator();
var it = mem.tokenize(u8, line, &ascii.spaces);
const command = it.next() orelse return;
if (ascii.eqlIgnoreCase(command, "settitle")) {
if (pinentry_config.title) |p| alloc.free(p);
if (it.next()) |_| pinentry_config.title = try alloc.dupe(u8, line["settitle".len..]);
try writer.writeAll("OK\n");
} else if (ascii.eqlIgnoreCase(command, "setprompt")) {
if (pinentry_config.prompt) |p| alloc.free(p);
if (it.next()) |_| pinentry_config.prompt = try alloc.dupe(u8, line["setprompt".len..]);
try writer.writeAll("OK\n");
} else if (ascii.eqlIgnoreCase(command, "setdesc")) {
if (pinentry_config.description) |d| alloc.free(d);
if (it.next()) |_| pinentry_config.description = try alloc.dupe(u8, line["setdesc".len..]);
try writer.writeAll("OK\n");
} else if (ascii.eqlIgnoreCase(command, "seterror")) {
if (pinentry_config.errmessage) |e| alloc.free(e);
if (it.next()) |_| pinentry_config.errmessage = try alloc.dupe(u8, line["seterror".len..]);
try writer.writeAll("OK\n");
} else if (ascii.eqlIgnoreCase(command, "getpin")) {
const pin = wayland.run(.pinentry_getpin) catch |err| {
// The client will ignore all messages starting with #, however they
// should still be logged by the gpg-agent, given that the right
// debug options are enabled. This means we can use this to insert
// arbitrary messages into the logs and therefore have proper error
// logging.
try writer.print("# Error: {s}\n", .{@errorName(err)});
try writer.writeAll("ERR 83886179 Operation cancelled\n");
return;
};
try writer.print("D {s}\nEND\nOK\n", .{pin});
// The errormessage must automatically reset after every GETPIN or
// CONFIRM action.
if (pinentry_config.errmessage) |e| {
alloc.free(e);
pinentry_config.errmessage = null;
}
} else if (ascii.eqlIgnoreCase(command, "confirm")) {
// TODO XXX Wayland widget
// TODO this can optionally have the "--one-button" option, in which
// case it effectively functions like MESSAGE.
try writer.writeAll("OK\n");
// The errormessage must automatically reset after every GETPIN or
// CONFIRM action.
if (pinentry_config.errmessage) |e| {
alloc.free(e);
pinentry_config.errmessage = null;
}
} else if (ascii.eqlIgnoreCase(command, "message")) {
// TODO XXX Wayland widget
// TODO optionally allow executing a command for a notification
try writer.writeAll("OK\n");
} else if (ascii.eqlIgnoreCase(command, "getinfo")) {
if (it.next()) |info| {
if (ascii.eqlIgnoreCase(info, "flavor")) {
try writer.writeAll("D wayprompt\nEND\n");
} else if (ascii.eqlIgnoreCase(info, "version")) {
try writer.writeAll("D 0.0.0\nEND\n");
} else if (ascii.eqlIgnoreCase(info, "pid")) {
if (builtin.os.tag == .linux) {
try writer.print("D {}\n", .{os.linux.getpid()});
}
// TODO Get pid on other systems. Do other systems even use GPG
// and pinentry programs?
}
}
try writer.writeAll("OK\n");
} else if (ascii.eqlIgnoreCase(command, "bye")) {
context.loop = false;
try writer.writeAll("OK\n");
} else if (ascii.eqlIgnoreCase(command, "option")) {
if (it.next()) |option| {
const option_wayland = "putenv=WAYLAND_DISPLAY=";
if (mem.startsWith(u8, option, option_wayland)) {
if (pinentry_config.wayland_display) |w| alloc.free(w);
pinentry_config.wayland_display = try alloc.dupeZ(u8, line["option ".len + option_wayland.len ..]);
try writer.print("# {s}\n", .{pinentry_config.wayland_display.?});
}
}
// Most options are internationalisation for features we don't offer.
// Unfortunately we have to pretend to accept them. If we ever decide
// to actually check the validity of the options, the error message for
// unknown ones would be: "ERR 83886254 Unknown option".
try writer.writeAll("OK\n");
} else if (ascii.eqlIgnoreCase(command, "reset")) {
pinentry_config.release();
try writer.writeAll("OK\n");
} else if (ascii.eqlIgnoreCase(command, "setkeyinfo")) {
// This request sets a key identifier to be used for key-caching
// mechanism (like for example the keyring daemons employed by some
// desktop environments). We do not provide this feature (yet? would be
// neat to have some himitsu integration here), however we unfortunately
// can not simply respond with "ERR 536870981" (used for unimplemented
// requests) because the gpg-agent will then abort. So let's just
// pretend we accept this value and silently ignore it.
try writer.writeAll("OK\n");
} else if (ascii.eqlIgnoreCase(command, "setok") or
ascii.eqlIgnoreCase(command, "setnotok") or // TODO if this is set, a third button should be displayed, which returns a different error than cancel
ascii.eqlIgnoreCase(command, "setcancel"))
{
// TODO implement?
try writer.writeAll("OK\n");
} else if (ascii.eqlIgnoreCase(command, "cancel") or
ascii.eqlIgnoreCase(command, "setgenpin") or // Undocumented, but present in "default" pinentry.
ascii.eqlIgnoreCase(command, "setgenpin_tt") or // Undocumented, but present in "default" pinentry.
ascii.eqlIgnoreCase(command, "settimeout") or // TODO timeout before aborting the prompt and returning an error.
ascii.eqlIgnoreCase(command, "end") or
ascii.eqlIgnoreCase(command, "quit") or // Specified as reserved for future use cases.
ascii.eqlIgnoreCase(command, "auth") or // Specified as reserved for future use cases.
ascii.eqlIgnoreCase(command, "cancel") or // Specified as reserved for future use cases.
ascii.eqlIgnoreCase(command, "clearpassphrase") or // Undocumented, but present in "default" pinentry.
ascii.eqlIgnoreCase(command, "setrepeat") or // TODO prompt twice for the password, compare them and only accept when equal.
ascii.eqlIgnoreCase(command, "setrepeaterror") or
ascii.eqlIgnoreCase(command, "setqualitybar") or
ascii.eqlIgnoreCase(command, "setqualitybar_tt"))
{
try writer.writeAll("ERR 536870981 Not implemented\n");
} else if (ascii.eqlIgnoreCase(command, "nop")) {
try writer.writeAll("OK\n");
} else if (ascii.eqlIgnoreCase(command, "help")) {
try writer.writeAll(
\\# NOP
\\# SETTITLE
\\# SETPROMPT
\\# SETDESC
\\# SETERROR
\\# GETPIN
\\# BYE
\\# OPTION
\\# RESET
\\OK
\\
);
} else {
try writer.writeAll("ERR 536871187 Unknown IPC command\n");
}
}

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const std = @import("std");
const unicode = std.unicode;
pub fn unicodeLen(bytes: []const u8) !usize {
var view = try unicode.Utf8View.init(bytes);
var len: usize = 0;
var it = view.iterator();
while (it.nextCodepointSlice()) |_| : (len += 1) {}
return len;
}

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const builtin = @import("builtin");
const std = @import("std");
const os = std.os;
const cstr = std.cstr;
const mem = std.mem;
const fmt = std.fmt;
const math = std.math;
const pixman = @import("pixman");
const xkb = @import("xkbcommon");
const wayland = @import("wayland");
const wl = wayland.client.wl;
const zwlr = wayland.client.zwlr;
const util = @import("util.zig");
const context = &@import("wayprompt.zig").context;
const pinentry_config = &@import("pinentry.zig").pinentry_config;
// TODO figure out size based on text
const widget_width = 600;
const widget_height = 200;
const Seat = struct {
wl_seat: *wl.Seat,
// Keyboard related objects.
wl_keyboard: ?*wl.Keyboard = null,
xkb_state: ?*xkb.State = null,
pub fn init(self: *Seat, wl_seat: *wl.Seat) !void {
self.* = .{ .wl_seat = wl_seat };
self.wl_seat.setListener(*Seat, seatListener, self);
}
pub fn deinit(self: *Seat) void {
self.releaseKeyboard();
self.wl_seat.destroy();
}
fn seatListener(_: *wl.Seat, event: wl.Seat.Event, self: *Seat) void {
switch (event) {
.capabilities => |ev| {
// TODO eventually also do pointer things, I guess.
if (ev.capabilities.keyboard) {
self.bindKeyboard() catch {};
} else {
self.releaseKeyboard();
}
},
.name => {}, // Do I look like I care?
}
}
fn bindKeyboard(self: *Seat) !void {
if (self.wl_keyboard != null) return;
self.wl_keyboard = try self.wl_seat.getKeyboard();
self.wl_keyboard.?.setListener(*Seat, keyboardListener, self);
// TODO XKBcommon things (see snayk)
}
fn releaseKeyboard(self: *Seat) void {
if (self.wl_keyboard) |kb| {
kb.release();
self.wl_keyboard = null;
// TODO XKBcommon things (see snayk)
}
if (self.xkb_state) |xs| {
xs.unref();
self.xkb_state = null;
}
}
fn keyboardListener(_: *wl.Keyboard, event: wl.Keyboard.Event, self: *Seat) void {
switch (event) {
.keymap => |ev| {
defer os.close(ev.fd);
if (ev.format != .xkb_v1) {
abort();
return;
}
const keymap_str = os.mmap(null, ev.size, os.PROT.READ, os.MAP.PRIVATE, ev.fd, 0) catch {
abort();
return;
};
defer os.munmap(keymap_str);
const keymap = xkb.Keymap.newFromBuffer(xkb_context.?, keymap_str.ptr, keymap_str.len - 1, .text_v1, .no_flags) orelse {
abort();
return;
};
defer keymap.unref();
const state = xkb.State.new(keymap) orelse {
abort();
return;
};
defer state.unref();
if (self.xkb_state) |xs| xs.unref();
self.xkb_state = state.ref();
},
.modifiers => |ev| {
if (self.xkb_state) |xs| {
_ = xs.updateMask(ev.mods_depressed, ev.mods_latched, ev.mods_locked, 0, 0, ev.group);
}
},
.key => |ev| {
if (ev.state != .pressed) return;
const keycode = ev.key + 8;
const keysym = self.xkb_state.?.keyGetOneSym(keycode);
if (keysym == .NoSymbol) return;
switch (@enumToInt(keysym)) {
xkb.Keysym.Return => {
loop = false;
return;
},
xkb.Keysym.BackSpace => {
// TODO to properly delete inputs, we need a codepoint
// buffer (u21). Probably just copy the one from
// nfm.
surface.?.render() catch abort();
return;
},
xkb.Keysym.Delete => {
pin = .{ .buffer = undefined, .len = 0 };
surface.?.render() catch abort();
return;
},
xkb.Keysym.Escape => {
abort();
return;
},
else => {},
}
{
@setRuntimeSafety(true);
const used = self.xkb_state.?.keyGetUtf8(keycode, pin.unusedCapacitySlice());
pin.resize(pin.len + used) catch abort();
}
// We only get keyboard input when a surface exists.
surface.?.render() catch abort();
},
.enter => {},
.leave => {},
.repeat_info => {},
}
}
};
const Surface = struct {
wl_surface: *wl.Surface = undefined,
layer_surface: *zwlr.LayerSurfaceV1 = undefined,
configured: bool = false,
scale: u31 = 1, // TODO we need to bind outputs for this and have a wl_seat listener
pub fn init(self: *Surface) !void {
const wl_surface = try compositor.?.createSurface();
errdefer wl_surface.destroy();
const layer_surface = try layer_shell.?.getLayerSurface(wl_surface, null, .overlay, "wayprompt");
errdefer layer_surface.destroy();
layer_surface.setListener(*Surface, layerSurfaceListener, self);
layer_surface.setSize(widget_width, widget_height);
layer_surface.setKeyboardInteractivity(.exclusive);
wl_surface.commit();
self.* = .{
.wl_surface = wl_surface,
.layer_surface = layer_surface,
};
}
pub fn deinit(self: *const Surface) void {
self.layer_surface.destroy();
self.wl_surface.destroy();
}
fn layerSurfaceListener(layer_surface: *zwlr.LayerSurfaceV1, event: zwlr.LayerSurfaceV1.Event, self: *Surface) void {
switch (event) {
.configure => |ev| {
// We just ignore the requested sizes. Figuring out a good size
// based on the text context is already complicated enough. If
// this annoys you, patches are welcome.
self.configured = true;
layer_surface.ackConfigure(ev.serial);
self.render() catch {
abort();
return;
};
},
.closed => abort(),
}
}
fn render(self: *Surface) !void {
if (!self.configured) return;
const buffer = (try buffer_pool.nextBuffer(widget_width, widget_height)) orelse return;
// Background.
{
const background_colour = comptime pixmanColourFromRGB("0x666666") catch @compileError("bad colour");
const border_colour = comptime pixmanColourFromRGB("0x333333") catch @compileError("bad colour");
borderedRectangle(buffer.*.pixman_image.?, 0, 0, widget_width, widget_height, 2, self.scale, &background_colour, &border_colour);
}
// Pin area.
{
const squares = 15;
const square_size = 20;
const square_padding = 10;
const square_halfpadding = @divExact(square_padding, 2);
const pinarea_height = square_size + 2 * square_padding;
const pinarea_width = squares * (square_size + 2 * square_halfpadding) + 2 * square_halfpadding;
const pinarea_x = @divExact(widget_width, 2) - @divExact(pinarea_width, 2);
const pinarea_y = 40;
const background_colour = comptime pixmanColourFromRGB("0x999999") catch @compileError("bad colour");
const border_colour = comptime pixmanColourFromRGB("0x7F7F7F") catch @compileError("bad colour");
const square_colour = comptime pixmanColourFromRGB("0xCCCCCC") catch @compileError("bad colour");
borderedRectangle(buffer.*.pixman_image.?, pinarea_x, pinarea_y, pinarea_width, pinarea_height, 2, self.scale, &background_colour, &border_colour);
var i: usize = 0;
const len = try util.unicodeLen(pin.slice());
while (i < len and i < squares) : (i += 1) {
const x = @intCast(u31, pinarea_x + i * square_size + (i + 1) * square_padding);
const y = pinarea_y + square_padding;
borderedRectangle(buffer.*.pixman_image.?, x, y, square_size, square_size, 1, self.scale, &square_colour, &border_colour);
}
}
switch (mode) {
.pinentry_getpin => {},
.pinentry_confirm => {},
.pinentry_message => {},
}
self.wl_surface.setBufferScale(self.scale);
self.wl_surface.attach(buffer.*.wl_buffer.?, 0, 0);
self.wl_surface.damageBuffer(0, 0, widget_width, widget_height);
self.wl_surface.commit();
buffer.*.busy = true;
}
// Copied and adapted from https://git.sr.ht/~novakane/zelbar, same license.
fn pixmanColourFromRGB(descr: []const u8) !pixman.Color {
if (descr.len != "0xRRGGBB".len) return error.BadColour;
if (descr[0] != '0' or descr[1] != 'x') return error.BadColour;
var color = try fmt.parseUnsigned(u32, descr[2..], 16);
if (descr.len == 8) {
color <<= 8;
color |= 0xff;
}
const bytes = @bitCast([4]u8, color);
const r: u16 = bytes[3];
const g: u16 = bytes[2];
const b: u16 = bytes[1];
const a: u16 = bytes[0];
return pixman.Color{
.red = @as(u16, r << math.log2(0x101)) + r,
.green = @as(u16, g << math.log2(0x101)) + g,
.blue = @as(u16, b << math.log2(0x101)) + b,
.alpha = @as(u16, a << math.log2(0x101)) + a,
};
}
fn borderedRectangle(
image: *pixman.Image,
_x: u31,
_y: u31,
_width: u31,
_height: u31,
_border: u31,
scale: u31,
background_colour: *const pixman.Color,
border_colour: *const pixman.Color,
) void {
const x = @intCast(i16, _x * scale);
const y = @intCast(i16, _y * scale);
const width = @intCast(u15, _width * scale);
const height = @intCast(u15, _height * scale);
const border = @intCast(u15, _border * scale);
_ = pixman.Image.fillRectangles(.src, image, background_colour, 1, &[1]pixman.Rectangle16{
.{ .x = x, .y = y, .width = width, .height = height },
});
_ = pixman.Image.fillRectangles(.src, image, border_colour, 4, &[4]pixman.Rectangle16{
.{ .x = x, .y = y, .width = width, .height = border }, // Top
.{ .x = x, .y = (y + height - border), .width = width, .height = border }, // Bottom
.{ .x = x, .y = (y + border), .width = border, .height = (height - 2 * border) }, // Left
.{ .x = (x + width - border), .y = (y + border), .width = border, .height = (height - 2 * border) }, // Right
});
}
};
const BufferPool = struct {
a: Buffer = .{},
b: Buffer = .{},
pub fn reset(self: *BufferPool) void {
self.a.deinit();
self.b.deinit();
self.* = .{};
}
pub fn nextBuffer(self: *BufferPool, width: u31, height: u31) !?*Buffer {
var buffer: *Buffer = blk: {
if (!self.a.busy) break :blk &self.a;
if (!self.b.busy) break :blk &self.b;
return null;
};
if (buffer.*.width != width or buffer.*.height != height or buffer.*.wl_buffer == null) {
buffer.*.deinit();
try buffer.*.init(width, height);
}
return buffer;
}
};
// Copied and adapted from https://git.sr.ht/~novakane/zelbar, same license.
const Buffer = struct {
wl_buffer: ?*wl.Buffer = null,
pixman_image: ?*pixman.Image = null,
data: ?[]align(std.mem.page_size) u8 = null,
width: u31 = 0, // u31 can coerce to i32.
height: u31 = 0,
busy: bool = false,
pub fn init(self: *Buffer, width: u31, height: u31) !void {
const stride = width << 2;
const size = stride * height;
if (size == 0) return error.ZeroSizedBuffer;
const fd = blk: {
if (builtin.target.os.tag == .linux) {
break :blk try os.memfd_createZ("/wayprompt", os.linux.MFD_CLOEXEC);
}
@compileError("patches welcome");
};
defer os.close(fd);
try os.ftruncate(fd, size);
const data = mem.bytesAsSlice(u8, try os.mmap(
null,
size,
os.PROT.READ | os.PROT.WRITE,
os.MAP.SHARED,
fd,
0,
));
errdefer os.munmap(data);
const shm_pool = try shm.?.createPool(fd, size);
defer shm_pool.destroy();
const wl_buffer = try shm_pool.createBuffer(0, width, height, stride, .argb8888);
errdefer wl_buffer.destroy();
wl_buffer.setListener(*Buffer, bufferListener, self);
const pixman_image = pixman.Image.createBitsNoClear(
.a8r8g8b8,
@intCast(c_int, width),
@intCast(c_int, height),
@ptrCast([*c]u32, data),
@intCast(c_int, stride),
);
errdefer _ = pixman_image.unref();
self.* = .{
.wl_buffer = wl_buffer,
.pixman_image = pixman_image,
.data = data,
.width = width,
.height = height,
};
}
fn deinit(self: Buffer) void {
if (self.pixman_image) |p| _ = p.unref();
if (self.wl_buffer) |wb| wb.destroy();
if (self.data) |d| os.munmap(d);
}
fn bufferListener(_: *wl.Buffer, event: wl.Buffer.Event, self: *Buffer) void {
switch (event) {
.release => self.busy = false,
}
}
};
const Mode = enum { pinentry_getpin, pinentry_message, pinentry_confirm };
var mode: Mode = undefined;
// zig-wayland unfortunately does not seem to accept void for user-data pointers.
const nop: u1 = undefined;
var layer_shell: ?*zwlr.LayerShellV1 = null;
var compositor: ?*wl.Compositor = null;
var shm: ?*wl.Shm = null;
var xkb_context: ?*xkb.Context = null;
var seats: std.TailQueue(Seat) = .{};
var buffer_pool: BufferPool = .{};
var surface: ?Surface = null;
var loop: bool = true;
var missing_wayland_interfaces: bool = false;
var pin: std.BoundedArray(u8, 1024) = .{ .buffer = undefined };
pub fn run(_mode: Mode) ![]const u8 {
mode = _mode;
// Prepare pin array.
pin = .{ .buffer = undefined, .len = 0 };
errdefer pin = .{ .buffer = undefined, .len = 0 };
// TODO figure out surface size based on what text is available and stuff
const wayland_display = blk: {
if (pinentry_config.wayland_display) |wd| break :blk wd;
if (os.getenv("WAYLAND_DISPLAY")) |wd| break :blk wd;
return error.NoWaylandDisplay;
};
const display = try wl.Display.connect(@ptrCast([*:0]const u8, wayland_display.ptr));
defer display.disconnect();
const registry = try display.getRegistry();
defer registry.destroy();
registry.setListener(*const u1, registryListener, &nop);
const sync = try display.sync();
defer sync.destroy();
sync.setListener(*const u1, syncListener, &nop);
xkb_context = xkb.Context.new(.no_flags) orelse return error.OutOfMemory;
defer reset();
// Per pinentry protocol documentation, the client may not send us anything
// while it is waiting for a data response. So it's fine to just jump into
// a different event loop here for a short while.
while (loop) {
if (display.dispatch() != .SUCCESS) return error.DispatchFailed;
}
if (missing_wayland_interfaces) return error.MissingWaylandInterfaces;
if (pin.len > 0) {
return pin.slice();
} else {
return error.NoPin;
}
}
/// Clear pin and prepare to exit wayland loop.
fn abort() void {
pin = .{ .buffer = undefined, .len = 0 };
loop = false;
}
/// Cleanup and reset for a possible future run. Does not reset pin, as that
/// will likely be used at callsite of run().
fn reset() void {
const alloc = context.gpa.allocator();
if (surface) |s| {
s.deinit();
surface = null;
}
if (layer_shell) |ls| {
ls.destroy();
layer_shell = null;
}
if (compositor) |cmp| {
cmp.destroy();
compositor = null;
}
if (shm) |sm| {
sm.destroy();
shm = null;
}
buffer_pool.reset();
var it = seats.first;
while (it) |node| {
it = node.next;
node.data.deinit();
alloc.destroy(node);
}
seats = .{};
if (xkb_context) |xc| {
xc.unref();
xkb_context = null;
}
missing_wayland_interfaces = false;
loop = true;
mode = undefined;
}
fn registryListener(registry: *wl.Registry, event: wl.Registry.Event, _: *const u1) void {
switch (event) {
.global => |ev| {
if (cstr.cmp(ev.interface, zwlr.LayerShellV1.getInterface().name) == 0) {
layer_shell = registry.bind(ev.name, zwlr.LayerShellV1, 4) catch {
abort();
return;
};
} else if (cstr.cmp(ev.interface, wl.Compositor.getInterface().name) == 0) {
compositor = registry.bind(ev.name, wl.Compositor, 4) catch {
abort();
return;
};
} else if (cstr.cmp(ev.interface, wl.Shm.getInterface().name) == 0) {
shm = registry.bind(ev.name, wl.Shm, 1) catch {
abort();
return;
};
} else if (cstr.cmp(ev.interface, wl.Seat.getInterface().name) == 0) {
const seat = registry.bind(ev.name, wl.Seat, 1) catch {
abort();
return;
};
newSeat(seat) catch {
seat.destroy();
abort();
};
}
},
.global_remove => {}, // We do not live long enough for this to become relevant.
}
}
fn newSeat(wl_seat: *wl.Seat) !void {
const alloc = context.gpa.allocator();
const node = try alloc.create(std.TailQueue(Seat).Node);
try node.data.init(wl_seat);
seats.append(node);
}
fn syncListener(_: *wl.Callback, _: wl.Callback.Event, _: *const u1) void {
if (layer_shell == null or compositor == null or shm == null) {
missing_wayland_interfaces = true;
abort();
}
surface = Surface{};
surface.?.init() catch {
surface = null;
abort();
return;
};
}

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const std = @import("std");
const mem = std.mem;
const os = std.os;
const heap = std.heap;
const log = std.log.scoped(.wayprompt);
const io = std.io;
const ini = @import("ini.zig");
const pinentry = @import("pinentry.zig");
const Context = struct {
loop: bool = true,
gpa: heap.GeneralPurposeAllocator(.{}) = .{},
};
pub var context: Context = .{};
pub fn main() !u8 {
defer _ = context.gpa.deinit();
const exec_name = blk: {
const full_command_name = mem.span(os.argv[0]);
var i: usize = full_command_name.len - 1;
while (i > 0) : (i -= 1) {
if (full_command_name[i] == '/') {
break :blk full_command_name[i + 1 ..];
}
}
break :blk full_command_name;
};
if (mem.startsWith(u8, exec_name, "pinentry")) {
return try pinentry.main();
} else if (mem.startsWith(u8, exec_name, "hiprompt")) {
@panic("TODO");
} else if (mem.eql(u8, exec_name, "wayprompt-cli")) {
@panic("TODO");
} else {
const stdout = io.getStdOut();
var out_buffer = io.bufferedWriter(stdout.writer());
const writer = out_buffer.writer();
try writer.writeAll(
\\wayprompt - multi-purpose prompter for Wayland
\\
\\To use as a pinentry replacement, run as 'pinentry-wayprompt'.
\\To use as a himitsu prompter, run as 'hiprompt-wayprompt'.
\\To use as a generic prompter for scripts, run as 'wayprompt-cli'.
\\
\\Read wayprompt(1) for further information.
\\
);
try out_buffer.flush();
}
return 0;
}