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07070100000000000041ED000000000000000000000003646518CA00000000000000000000000000000000000000000000001700000000ktls-utils-0.9/.github07070100000001000041ED000000000000000000000002646518CA00000000000000000000000000000000000000000000002100000000ktls-utils-0.9/.github/workflows07070100000002000081A4000000000000000000000001646518CA0000024F000000000000000000000000000000000000002E00000000ktls-utils-0.9/.github/workflows/makefile.ymlname: Makefile CI

on: [ push, pull_request, workflow_dispatch ]

jobs:
  build:

runs-on: ubuntu-latest

steps:
    - uses: actions/checkout@v3
    
    - name: Install packages
      run: |
        sudo apt-get update
        sudo apt-get -y install gnutls-dev libkeyutils-dev libnl-3-dev libnl-genl-3-dev

- name: autogen.sh
      run: ./autogen.sh

- name: configure
      run: ./configure --with-systemd
      
    - name: Install dependencies
      run: make
      
    - name: Run check
      run: make check
      
    - name: Run distcheck
      run: make distcheck
07070100000003000081A4000000000000000000000001646518CA00000414000000000000000000000000000000000000002D00000000ktls-utils-0.9/.github/workflows/release.ymlname: "Generate release assets"

on:
  push:
    tags:
      - "ktls-utils-*"

jobs:
  build:

runs-on: ubuntu-latest
    permissions:
      contents: write

steps:
    - name: "Checkout"
      uses: actions/checkout@v3

- name: "Install dependencies"
      run: |
        sudo apt-get update
        sudo apt-get -y install gnutls-dev libkeyutils-dev libnl-3-dev libnl-genl-3-dev

- name: "Instantiate autotools"
      run: ./autogen.sh

- name: "Configure build environment"
      run: ./configure --with-systemd

- name: "Build release asset"
      run: make dist

- name: "Version"
      run: |
        echo "ktls_utils_version=`./configure --version | awk '{print $3;; exit}'`" >> $GITHUB_ENV

- name: "Create release"
      uses: ncipollo/release-action@v1
      id: create_release
      with:
        artifacts: ktls-utils-${{ env.ktls_utils_version }}.tar.gz
        artifactContentType: application/gzip
        bodyFile: NEWS
        name: v${{ env.ktls_utils_version }}
        tag: ${{ github.ref }}
07070100000004000081A4000000000000000000000001646518CA0000011A000000000000000000000000000000000000001A00000000ktls-utils-0.9/.gitignore*.swp
*.o
autom4te.cache/
configure.ac~
configure
configure~
cscope.*
Makefile
Makefile.in
.deps/
aclocal.m4
compile
config.h
config.h.in
config.h.in~
config.guess
config.log
config.status
config.sub
cov-int/
depcomp
install-sh
missing
ktls-utils-*.tar.gz
ktls-utils-*.tgz
stamp-h1
07070100000005000081A4000000000000000000000001646518CA000000B8000000000000000000000000000000000000001700000000ktls-utils-0.9/AUTHORSChuck Lever <chuck.lever@oracle.com>
Dr. Hannes Reinecke <hare@suse.de>
Benjamin Coddington <bcodding@redhat.com>
Olga Kornievskaia <aglo@netapp.com>
Scott Mayhew <smayhew@redhat.com>
07070100000006000081A4000000000000000000000001646518CA00000D5E000000000000000000000000000000000000001F00000000ktls-utils-0.9/CONTRIBUTING.md# Contributing Guidelines

Thank you for your interest in contributing to our project!
Whether it's a bug report, new feature, correction, or additional
documentation, we greatly value feedback and contributions from
the open source community.

Please read through this document before submitting an issue or pull
request to ensure we have all the necessary information to
effectively respond to your bug report or contribution.

An old-school developer's mailing list is available. See
[lists.linux.dev](https://subspace.kernel.org/lists.linux.dev.html)
for links to subscribe to <kernel-tls-handshake@lists.linux.dev> or
to access archived threads.

## Opening issues

We welcome you to use the GitHub issue tracker to report bugs or
suggest features.

When filing an issue, please check existing open or recently closed
issues to make sure somebody else hasn't already reported the
issue. Please try to include as much information as you can.
Details like these are incredibly useful:

* A reproducible test case or series of steps
* The version of our code being used
* Any modifications you've made relevant to the bug
* Anything unusual about your environment or deployment

If you think you've found a security
vulnerability, do not raise a GitHub issue and follow the instructions in our
[security policy](./SECURITY.md).

## Contributing code

We welcome your code contributions. Before submitting code via a pull request,
you will need to have signed the [Oracle Contributor Agreement][OCA] (OCA) and
your commits need to include the following line using the name and e-mail
address you used to sign the OCA:

```text
Signed-off-by: Your Name <you@example.org>
```

This can be automatically added to pull requests by committing with `--sign-off`
or `-s`, e.g.

```text
git commit --signoff
```

Only pull requests from committers that can be verified as having signed the OCA
can be accepted.

## Pull request process

Contributions via pull requests are much appreciated.
Before sending us a pull request, please ensure that:

1. You open an issue to discuss any significant work - we would hate
   for your time to be wasted.
2. You check existing open, and recently merged, pull requests to make
   sure someone else hasn't addressed the problem already.

To send us a pull request, please:

1. Fork the repository.
2. Modify the source. Focus on the specific change you are
   contributing. If you also reformat all the code, it will
   be hard for us to review on your change.
3. Ensure local tests pass.
4. Commit to your fork using concise commit messages.
5. Send us a pull request, answering any default questions in the pull
   request interface.
6. Pay attention to any automated CI failures reported in the pull
   request and stay involved in the conversation.

GitHub provides additional document on
[forking a repository](https://help.github.com/articles/fork-a-repo/) and
[creating a pull request](https://help.github.com/articles/creating-a-pull-request/).

## Licensing

See the [COPYING](COPYING) file for our project's licensing. We will
ask you to confirm the licensing of your contribution.

## Code of conduct

Follow the [Golden Rule](https://en.wikipedia.org/wiki/Golden_Rule). If you'd
like more specific guidelines, see the [Contributor Covenant Code of Conduct][COC].

[OCA]: https://oca.opensource.oracle.com
[COC]: https://www.contributor-covenant.org/version/1/4/code-of-conduct/
07070100000007000081A4000000000000000000000001646518CA0000464A000000000000000000000000000000000000001700000000ktls-utils-0.9/COPYING		    GNU GENERAL PUBLIC LICENSE
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Yoyodyne, Inc., hereby disclaims all copyright interest in the program
  `Gnomovision' (which makes passes at compilers) written by James Hacker.

<signature of Ty Coon>, 1 April 1989
  Ty Coon, President of Vice

ktls-utils 0.9 - 2023-05-01
 * Cipher negotiaion now conforms with distro security policies
 * Improve Server Name Indicator support
 * Disable Nagle during handshakes
 * Send TLS Alerts on handshake errors

ktls-utils 0.8 - 2023-04-05
 * Replace the listen-based upcall mechanism with netlink
 * Implement server-side handshake support
 * Implement x.509 certificate verification
 * Implement keyring-based exchange of authentication material

ktls-utils 0.7 - 2022-11-10
 * Remove the -n command line option
 * Support client-side peer authentication
 * Support upcall API changes in v6.0 prototype kernel
 * Add /etc/tlshd.conf with support for default cert and private key

ktls-utils 0.6 - 2022-05-27
 * Update value of SOL_TLSH constant for kernel v5.18
 * Fix gnutls_transport_is_ktls_enabled()
 * Avoid zombie children
 * Report peer certificate verification failures
 * Split the debug command-line option

ktls-utils 0.5 - 2022-04-11
 * Fix retrieval of TLSH_PRIORITIES
 * Refactor keyring code
 * Sketch in x.509 client authentication support
 * Re-license request from Oracle CorpArch
 * Enable thorough static code checking
 * Enable compilation with older versions of GnuTLS

ktls-utils 0.4 - 2022-03-04
 * Add date and time to build version strings
 * Document FIPS mode in tlshd(8)
 * Initial support for PSK handshakes
 * Initial support for SM4_GCM and SM4_CCM ciphers
 * Support SOL_TLSH socket options

ktls-utils 0.3 - 2022-02-25
 * Tell server not to send New Session tickets
 * Document SSLKEYLOGFILE in tlshd(8)
 * Move kTLS-specific code to src/tlshd/ktls.c
 * Suggested logic to distinguish between PSK and x.509
 * Check for existence of keyutils.h

ktls-utils 0.2 - 2022-02-08
 * Replace OpenSSL with GnuTLS
 * AF_TLSH kernel API has been simplified
 * Fixes to get TLS handshake working
 * More syslog helpers
 * Added sample systemd unit

ktls-utils 0.1 - 2021-12-13
 * Initial code base
07070100000009000081A4000000000000000000000001646518CA00003EBB000000000000000000000000000000000000001700000000ktls-utils-0.9/INSTALLNormal instructions for building ktls-utils
*******************************************

$ ./autogen.sh
 $ ./configure --with-systemd
 $ make

# make install
 # systemctl daemon-reload
 # systemctl enable --now tlshd

Additional configuration information is provided in the generic
instructions below.

Installation Instructions
*************************

Copying and distribution of this file, with or without modification,
are permitted in any medium without royalty provided the copyright
notice and this notice are preserved.  This file is offered as-is,
without warranty of any kind.

Basic Installation
==================

Briefly, the shell command `./configure && make && make install'
should configure, build, and install this package.  The following
more-detailed instructions are generic; see the `README' file for
instructions specific to this package.  Some packages provide this
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in *note Makefile Conventions: (standards)Makefile Conventions.

The `configure' shell script attempts to guess correct values for
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If you need to do unusual things to compile the package, please try
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The simplest way to compile this package is:

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Running `configure' might take a while.  While running, it prints
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2. Type `make' to compile the package.

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5. Optionally, type `make installcheck' to repeat any self-tests, but
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     regular user, particularly if the prior `make install' required
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6. You can remove the program binaries and object files from the
     source code directory by typing `make clean'.  To also remove the
     files that `configure' created (so you can compile the package for
     a different kind of computer), type `make distclean'.  There is
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7. Often, you can also type `make uninstall' to remove the installed
     files again.  In practice, not all packages have tested that
     uninstallation works correctly, even though it is required by the
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8. Some packages, particularly those that use Automake, provide `make
     distcheck', which can by used by developers to test that all other
     targets like `make install' and `make uninstall' work correctly.
     This target is generally not run by end users.

Compilers and Options
=====================

Some systems require unusual options for compilation or linking that
the `configure' script does not know about.  Run `./configure --help'
for details on some of the pertinent environment variables.

You can give `configure' initial values for configuration parameters
by setting variables in the command line or in the environment.  Here
is an example:

./configure CC=c99 CFLAGS=-g LIBS=-lposix

*Note Defining Variables::, for more details.

Compiling For Multiple Architectures
====================================

You can compile the package for more than one kind of computer at the
same time, by placing the object files for each architecture in their
own directory.  To do this, you can use GNU `make'.  `cd' to the
directory where you want the object files and executables to go and run
the `configure' script.  `configure' automatically checks for the
source code in the directory that `configure' is in and in `..'.  This
is known as a "VPATH" build.

With a non-GNU `make', it is safer to compile the package for one
architecture at a time in the source code directory.  After you have
installed the package for one architecture, use `make distclean' before
reconfiguring for another architecture.

On MacOS X 10.5 and later systems, you can create libraries and
executables that work on multiple system types--known as "fat" or
"universal" binaries--by specifying multiple `-arch' options to the
compiler but only a single `-arch' option to the preprocessor.  Like
this:

./configure CC="gcc -arch i386 -arch x86_64 -arch ppc -arch ppc64" \
                 CXX="g++ -arch i386 -arch x86_64 -arch ppc -arch ppc64" \
                 CPP="gcc -E" CXXCPP="g++ -E"

This is not guaranteed to produce working output in all cases, you
may have to build one architecture at a time and combine the results
using the `lipo' tool if you have problems.

Installation Names
==================

By default, `make install' installs the package's commands under
`/usr/local/bin', include files under `/usr/local/include', etc.  You
can specify an installation prefix other than `/usr/local' by giving
`configure' the option `--prefix=PREFIX', where PREFIX must be an
absolute file name.

You can specify separate installation prefixes for
architecture-specific files and architecture-independent files.  If you
pass the option `--exec-prefix=PREFIX' to `configure', the package uses
PREFIX as the prefix for installing programs and libraries.
Documentation and other data files still use the regular prefix.

In addition, if you use an unusual directory layout you can give
options like `--bindir=DIR' to specify different values for particular
kinds of files.  Run `configure --help' for a list of the directories
you can set and what kinds of files go in them.  In general, the
default for these options is expressed in terms of `${prefix}', so that
specifying just `--prefix' will affect all of the other directory
specifications that were not explicitly provided.

The most portable way to affect installation locations is to pass the
correct locations to `configure'; however, many packages provide one or
both of the following shortcuts of passing variable assignments to the
`make install' command line to change installation locations without
having to reconfigure or recompile.

The first method involves providing an override variable for each
affected directory.  For example, `make install
prefix=/alternate/directory' will choose an alternate location for all
directory configuration variables that were expressed in terms of
`${prefix}'.  Any directories that were specified during `configure',
but not in terms of `${prefix}', must each be overridden at install
time for the entire installation to be relocated.  The approach of
makefile variable overrides for each directory variable is required by
the GNU Coding Standards, and ideally causes no recompilation.
However, some platforms have known limitations with the semantics of
shared libraries that end up requiring recompilation when using this
method, particularly noticeable in packages that use GNU Libtool.

The second method involves providing the `DESTDIR' variable.  For
example, `make install DESTDIR=/alternate/directory' will prepend
`/alternate/directory' before all installation names.  The approach of
`DESTDIR' overrides is not required by the GNU Coding Standards, and
does not work on platforms that have drive letters.  On the other hand,
it does better at avoiding recompilation issues, and works well even
when some directory options were not specified in terms of `${prefix}'
at `configure' time.

Optional Features
=================

If the package supports it, you can cause programs to be installed
with an extra prefix or suffix on their names by giving `configure' the
option `--program-prefix=PREFIX' or `--program-suffix=SUFFIX'.

Some packages pay attention to `--enable-FEATURE' options to
`configure', where FEATURE indicates an optional part of the package.
They may also pay attention to `--with-PACKAGE' options, where PACKAGE
is something like `gnu-as' or `x' (for the X Window System).  The
`README' should mention any `--enable-' and `--with-' options that the
package recognizes.

For packages that use the X Window System, `configure' can usually
find the X include and library files automatically, but if it doesn't,
you can use the `configure' options `--x-includes=DIR' and
`--x-libraries=DIR' to specify their locations.

Some packages offer the ability to configure how verbose the
execution of `make' will be.  For these packages, running `./configure
--enable-silent-rules' sets the default to minimal output, which can be
overridden with `make V=1'; while running `./configure
--disable-silent-rules' sets the default to verbose, which can be
overridden with `make V=0'.

Particular systems
==================

On HP-UX, the default C compiler is not ANSI C compatible.  If GNU
CC is not installed, it is recommended to use the following options in
order to use an ANSI C compiler:

./configure CC="cc -Ae -D_XOPEN_SOURCE=500"

and if that doesn't work, install pre-built binaries of GCC for HP-UX.

HP-UX `make' updates targets which have the same time stamps as
their prerequisites, which makes it generally unusable when shipped
generated files such as `configure' are involved.  Use GNU `make'
instead.

On OSF/1 a.k.a. Tru64, some versions of the default C compiler cannot
parse its `<wchar.h>' header file.  The option `-nodtk' can be used as
a workaround.  If GNU CC is not installed, it is therefore recommended
to try

./configure CC="cc"

and if that doesn't work, try

./configure CC="cc -nodtk"

On Solaris, don't put `/usr/ucb' early in your `PATH'.  This
directory contains several dysfunctional programs; working variants of
these programs are available in `/usr/bin'.  So, if you need `/usr/ucb'
in your `PATH', put it _after_ `/usr/bin'.

On Haiku, software installed for all users goes in `/boot/common',
not `/usr/local'.  It is recommended to use the following options:

./configure --prefix=/boot/common

Specifying the System Type
==========================

There may be some features `configure' cannot figure out
automatically, but needs to determine by the type of machine the package
will run on.  Usually, assuming the package is built to be run on the
_same_ architectures, `configure' can figure that out, but if it prints
a message saying it cannot guess the machine type, give it the
`--build=TYPE' option.  TYPE can either be a short name for the system
type, such as `sun4', or a canonical name which has the form:

CPU-COMPANY-SYSTEM

where SYSTEM can have one of these forms:

OS
     KERNEL-OS

See the file `config.sub' for the possible values of each field.  If
`config.sub' isn't included in this package, then this package doesn't
need to know the machine type.

If you are _building_ compiler tools for cross-compiling, you should
use the option `--target=TYPE' to select the type of system they will
produce code for.

If you want to _use_ a cross compiler, that generates code for a
platform different from the build platform, you should specify the
"host" platform (i.e., that on which the generated programs will
eventually be run) with `--host=TYPE'.

Sharing Defaults
================

If you want to set default values for `configure' scripts to share,
you can create a site shell script called `config.site' that gives
default values for variables like `CC', `cache_file', and `prefix'.
`configure' looks for `PREFIX/share/config.site' if it exists, then
`PREFIX/etc/config.site' if it exists.  Or, you can set the
`CONFIG_SITE' environment variable to the location of the site script.
A warning: not all `configure' scripts look for a site script.

Defining Variables
==================

Variables not defined in a site shell script can be set in the
environment passed to `configure'.  However, some packages may run
configure again during the build, and the customized values of these
variables may be lost.  In order to avoid this problem, you should set
them in the `configure' command line, using `VAR=value'.  For example:

./configure CC=/usr/local2/bin/gcc

causes the specified `gcc' to be used as the C compiler (unless it is
overridden in the site shell script).

Unfortunately, this technique does not work for `CONFIG_SHELL' due to
an Autoconf limitation.  Until the limitation is lifted, you can use
this workaround:

CONFIG_SHELL=/bin/bash ./configure CONFIG_SHELL=/bin/bash

`configure' Invocation
======================

`configure' recognizes the following options to control how it
operates.

`--help'
`-h'
     Print a summary of all of the options to `configure', and exit.

`--help=short'
`--help=recursive'
     Print a summary of the options unique to this package's
     `configure', and exit.  The `short' variant lists options used
     only in the top level, while the `recursive' variant lists options
     also present in any nested packages.

`--version'
`-V'
     Print the version of Autoconf used to generate the `configure'
     script, and exit.

`--cache-file=FILE'
     Enable the cache: use and save the results of the tests in FILE,
     traditionally `config.cache'.  FILE defaults to `/dev/null' to
     disable caching.

`--config-cache'
`-C'
     Alias for `--cache-file=config.cache'.

`--quiet'
`--silent'
`-q'
     Do not print messages saying which checks are being made.  To
     suppress all normal output, redirect it to `/dev/null' (any error
     messages will still be shown).

`--srcdir=DIR'
     Look for the package's source code in directory DIR.  Usually
     `configure' can determine that directory automatically.

`--prefix=DIR'
     Use DIR as the installation prefix.  *note Installation Names::
     for more details, including other options available for fine-tuning
     the installation locations.

`--no-create'
`-n'
     Run the configure checks, but stop before creating any output
     files.

`configure' also accepts some other, not widely useful, options.  Run
`configure --help' for more details.
0707010000000A000081A4000000000000000000000001646518CA0000464A000000000000000000000000000000000000001B00000000ktls-utils-0.9/LICENSE.txt		    GNU GENERAL PUBLIC LICENSE
		       Version 2, June 1991

Preamble

We protect your rights with two steps: (1) copyright the software, and
(2) offer you this license which gives you legal permission to copy,
distribute and/or modify the software.

The precise terms and conditions for copying, distribution and
modification follow.

GNU GENERAL PUBLIC LICENSE
   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION

You may charge a fee for the physical act of transferring a copy, and
you may at your option offer warranty protection in exchange for a fee.

a) You must cause the modified files to carry prominent notices
    stating that you changed the files and the date of any change.

This section is intended to make thoroughly clear what is believed to
be a consequence of the rest of this License.

NO WARRANTY

END OF TERMS AND CONDITIONS

How to Apply These Terms to Your New Programs

<one line to give the program's name and a brief idea of what it does.>
    Copyright (C) <year>  <name of author>

Also add information on how to contact you by electronic and paper mail.

If the program is interactive, make it output a short notice like this
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  `Gnomovision' (which makes passes at compilers) written by James Hacker.

<signature of Ty Coon>, 1 April 1989
  Ty Coon, President of Vice

This General Public License does not permit incorporating your program into
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0707010000000B000081A4000000000000000000000001646518CA00000380000000000000000000000000000000000000001B00000000ktls-utils-0.9/Makefile.am#
# Copyright (c) 2022 Oracle and/or its affiliates.
#
# ktls-utils is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License as
# published by the Free Software Foundation; version 2.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
# 02110-1301, USA.
#

AUTOMAKE_OPTIONS	= foreign

EXTRA_DIST		= autogen.sh CONTRIBUTING.md LICENSE.txt \
			  README.md SECURITY.md
SUBDIRS			= src systemd
MAINTAINERCLEANFILES	= Makefile.in cscope.* ktls-utils*.tar.gz
0707010000000C000081A4000000000000000000000001646518CA000000CF000000000000000000000000000000000000001400000000ktls-utils-0.9/NEWSktls-utils 0.9 - 2023-05-01
 * Cipher negotiaion now conforms with distro security policies
 * Improve Server Name Indicator support
 * Disable Nagle during handshakes
 * Send TLS Alerts on handshake errors
0707010000000D000081A4000000000000000000000001646518CA0000082D000000000000000000000000000000000000001600000000ktls-utils-0.9/README# Release Notes for ktls-utils 0.9

Note well: This is experimental prototype software. It's purpose is
purely as a demonstration and proof-of-concept. USE AT YOUR OWN RISK.

In-kernel TLS consumers need a mechanism to perform TLS handshakes
on a connected socket to negotiate TLS session parameters that can
then be programmed into the kernel's TLS record protocol engine.

This package of software provides a TLS handshake user agent that
listens for kernel requests and then materializes a user space
socket endpoint on which to perform these handshakes. The resulting
negotiated session parameters are passed back to the kernel via
standard kTLS socket options.

See [COPYING](COPYING) for the full text of the license under which
this package is released.

## Dependencies

* The local kernel must be built with CONFIG_TLS enabled
* The local build environment requires GnuTLS and keyutils

## Installation

See [NEWS](NEWS) to see what has changed in the latest release,
and see [INSTALL](INSTALL) for build instructions.

## Contributing

This project welcomes contributions from the community.
Before submitting a pull request,
please [review our contribution guide](./CONTRIBUTING.md).

Work that remains:

### Required for client-side prototype

* Prototype requirements have all been met

### Nice-to have for client-side prototype

* support for using private key material stored in the local TPM
* support for session key renegotiation
* send proper SSL shutdown message when kernel consumer is finished with an endpoint
* check for the correct ALPN in the server's certificate

### Unplanned work

* support for DTLS
* support for RPC-with-TLS certificate extended key usage
* support for root device / filesystem with TLS
* support for sharing TLS sessions across sockets
* support for multiple trust chains for server verification

## Security

Please consult the [security guide](./SECURITY.md) for our responsible security vulnerability disclosure process

## License

Released under the GNU GENERAL PUBLIC LICENSE version 2
0707010000000E000081A4000000000000000000000001646518CA0000082D000000000000000000000000000000000000001900000000ktls-utils-0.9/README.md# Release Notes for ktls-utils 0.9

Note well: This is experimental prototype software. It's purpose is
purely as a demonstration and proof-of-concept. USE AT YOUR OWN RISK.

In-kernel TLS consumers need a mechanism to perform TLS handshakes
on a connected socket to negotiate TLS session parameters that can
then be programmed into the kernel's TLS record protocol engine.

See [COPYING](COPYING) for the full text of the license under which
this package is released.

## Dependencies

* The local kernel must be built with CONFIG_TLS enabled
* The local build environment requires GnuTLS and keyutils

## Installation

See [NEWS](NEWS) to see what has changed in the latest release,
and see [INSTALL](INSTALL) for build instructions.

## Contributing

This project welcomes contributions from the community.
Before submitting a pull request,
please [review our contribution guide](./CONTRIBUTING.md).

Work that remains:

### Required for client-side prototype

* Prototype requirements have all been met

### Nice-to have for client-side prototype

### Unplanned work

## Security

Please consult the [security guide](./SECURITY.md) for our responsible security vulnerability disclosure process

## License

Released under the GNU GENERAL PUBLIC LICENSE version 2
0707010000000F000081A4000000000000000000000001646518CA000006CE000000000000000000000000000000000000001B00000000ktls-utils-0.9/SECURITY.md# Reporting security vulnerabilities

Oracle values the independent security research community and believes that
responsible disclosure of security vulnerabilities helps us ensure the security
and privacy of all our users.

Please do NOT raise a GitHub Issue to report a security vulnerability. If you
believe you have found a security vulnerability, please submit a report to
[secalert_us@oracle.com][1] preferably with a proof of concept. Please review
some additional information on [how to report security vulnerabilities to Oracle][2].
We encourage people who contact Oracle Security to use email encryption using
[our encryption key][3].

We ask that you do not use other channels or contact the project maintainers
directly.

Non-vulnerability related security issues including ideas for new or improved
security features are welcome on GitHub Issues.

## Security updates, alerts and bulletins

Security updates will be released on a regular cadence. Many of our projects
will typically release security fixes in conjunction with the
[Oracle Critical Patch Update][3] program. Additional
information, including past advisories, is available on our [security alerts][4]
page.

## Security-related information

We will provide security related information such as a threat model, considerations
for secure use, or any known security issues in our documentation. Please note
that labs and sample code are intended to demonstrate a concept and may not be
sufficiently hardened for production use.

[1]: mailto:secalert_us@oracle.com
[2]: https://www.oracle.com/corporate/security-practices/assurance/vulnerability/reporting.html
[3]: https://www.oracle.com/security-alerts/encryptionkey.html
[4]: https://www.oracle.com/security-alerts/
07070100000010000081A4000000000000000000000001646518CA000067A2000000000000000000000000000000000000002400000000ktls-utils-0.9/THIRD_PARTY_LICENSES                  GNU LESSER GENERAL PUBLIC LICENSE
                       Version 2.1, February 1999

Copyright (C) 1991, 1999 Free Software Foundation, Inc.
 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 Everyone is permitted to copy and distribute verbatim copies
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[This is the first released version of the Lesser GPL.  It also counts
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That's all there is to it!
07070100000011000081ED000000000000000000000001646518CA00000407000000000000000000000000000000000000001A00000000ktls-utils-0.9/autogen.sh#!/bin/sh -e
#
# Reset the state of the autotools infrastructure
#
# Copyright (c) 2022 Oracle and/or its affiliates.
#
# ktls-utils is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License as
# published by the Free Software Foundation; version 2.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
# 02110-1301, USA.
#

GEN="compile config.guess config.sub depcomp install-sh \
     missing aclocal.m4 configure config.h.in \
     autom4te.cache"

for FILE in $GEN
do
  rm -rf $FILE
done

rm -f ktls-utils*.tar.gz

aclocal
autoheader
automake --add-missing --copy --gnu
autoconf

exit 0
07070100000012000081A4000000000000000000000001646518CA000009EF000000000000000000000000000000000000001C00000000ktls-utils-0.9/configure.acdnl Process this file with autoconf to produce a configure script.
dnl
dnl Copyright (c) 2022 Oracle and/or its affiliates.
dnl
dnl ktls-utils is free software; you can redistribute it and/or
dnl modify it under the terms of the GNU General Public License as
dnl published by the Free Software Foundation; version 2.
dnl
dnl This program is distributed in the hope that it will be useful,
dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
dnl General Public License for more details.
dnl
dnl You should have received a copy of the GNU General Public License
dnl along with this program; if not, write to the Free Software
dnl Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
dnl 02110-1301, USA.
dnl

AC_PREREQ([2.69])
AC_INIT([ktls-utils],[0.9],[kernel-tls-handshake@lists.linux.dev])
AM_INIT_AUTOMAKE
AM_SILENT_RULES([yes])
AC_CONFIG_SRCDIR([config.h.in])
AC_CONFIG_HEADERS([config.h])
AC_PREFIX_DEFAULT(/usr)
AC_USE_SYSTEM_EXTENSIONS

AC_LANG(C)
AC_PROG_CC
AC_PROG_INSTALL

unitdir=/usr/lib/systemd/system
AC_ARG_WITH(systemd,
	[AS_HELP_STRING([--with-systemd@<:@=unit-dir-path@:>@],
			[install systemd unit files @<:@Default: no, and path defaults to /usr/lib/systemd/system if not given@:>@])],
	if test "$withval" != "no" ; then
		use_systemd=1
		if test "$withval" != "yes" ; then
			unitdir=$withval
		fi
	else
		use_systemd=0
	fi
	)
	AM_CONDITIONAL(INSTALL_SYSTEMD, [test "$use_systemd" = 1])
	AC_SUBST(unitdir)

PKG_PROG_PKG_CONFIG([0.9.0])
PKG_CHECK_MODULES([LIBGNUTLS], [gnutls >= 3.3.0])
AC_SUBST([LIBGNUTLS_CFLAGS])
AC_SUBST([LIBGNUTLS_LIBS])
PKG_CHECK_MODULES([LIBKEYUTILS], [libkeyutils])
AC_SUBST([LIBKEYUTILS_CFLAGS])
AC_SUBST([LIBKEYUTILS_LIBS])
PKG_CHECK_MODULES([GLIB], glib-2.0 >= 2.6)
AC_SUBST([GLIB_CFLAGS])
AC_SUBST([GLIB_LIBS])
PKG_CHECK_MODULES([LIBNL3], libnl-3.0 >= 3.1)
AC_SUBST([LIBNL3_CFLAGS])
AC_SUBST([LIBNL3_LIBS])

AC_CHECK_HEADERS([linux/openat2.h])

AC_CHECK_LIB([gnutls], [gnutls_transport_is_ktls_enabled],
             [AC_DEFINE([HAVE_GNUTLS_TRANSPORT_IS_KTLS_ENABLED], [1],
                        [Define to 1 if you have the gnutls_transport_is_ktls_enabled function.])])
AC_CHECK_LIB([gnutls], [gnutls_protocol_set_enabled],
             [AC_DEFINE([HAVE_GNUTLS_PROTOCOL_SET_ENABLED], [1],
                        [Define to 1 if you have the gnutls_protocol_set_enabled function.])])
AC_SUBST([AM_CPPFLAGS])

AC_CONFIG_FILES([Makefile src/Makefile src/tlshd/Makefile systemd/Makefile])
AC_OUTPUT
07070100000013000041ED000000000000000000000003646518CA00000000000000000000000000000000000000000000001300000000ktls-utils-0.9/src07070100000014000081A4000000000000000000000001646518CA000002F0000000000000000000000000000000000000001F00000000ktls-utils-0.9/src/Makefile.am#
# Copyright (c) 2022 Oracle and/or its affiliates.
#
# ktls-utils is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License as
# published by the Free Software Foundation; version 2.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
# 02110-1301, USA.
#

SUBDIRS			= tlshd
MAINTAINERCLEANFILES	= Makefile.in
07070100000015000041ED000000000000000000000002646518CA00000000000000000000000000000000000000000000001900000000ktls-utils-0.9/src/tlshd07070100000016000081A4000000000000000000000001646518CA00000006000000000000000000000000000000000000002400000000ktls-utils-0.9/src/tlshd/.gitignoretlshd
07070100000017000081A4000000000000000000000001646518CA000004D1000000000000000000000000000000000000002500000000ktls-utils-0.9/src/tlshd/Makefile.am#
# Copyright (c) 2022 Oracle and/or its affiliates.
#
# ktls-utils is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License as
# published by the Free Software Foundation; version 2.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
# 02110-1301, USA.
#

dist_sysconf_DATA	= tlshd.conf

man5_MANS		= tlshd.conf.man
man8_MANS		= tlshd.man
EXTRA_DIST		= $(man5_MANS) $(man8_MANS)

sbin_PROGRAMS		= tlshd
tlshd_CFLAGS		= -Werror -Wall -Wextra $(LIBGNUTLS_CFLAGS) \
			  $(LIBKEYUTILS_CFLAGS) $(GLIB_CFLAGS) $(LIBNL3_CFLAGS)
tlshd_SOURCES		= client.c config.c handshake.c keyring.c ktls.c log.c \
			  main.c netlink.c netlink.h server.c tlshd.h
tlshd_LDADD		= $(LIBGNUTLS_LIBS) $(LIBKEYUTILS_LIBS) $(GLIB_LIBS) \
			  $(LIBNL3_LIBS) -lnl-genl-3

MAINTAINERCLEANFILES	= Makefile.in cscope.out
07070100000018000081A4000000000000000000000001646518CA00002B0F000000000000000000000000000000000000002200000000ktls-utils-0.9/src/tlshd/client.c/*
 * Perform a TLSv1.3 handshake.
 *
 * Copyright (c) 2022 Oracle and/or its affiliates.
 * Copyright (c) 2022 SUSE LLC.
 *
 * ktls-utils is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; version 2.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301, USA.
 */

#include "config.h"

#include <sys/types.h>
#include <sys/socket.h>

#include <stdbool.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <errno.h>
#include <keyutils.h>

#include <gnutls/gnutls.h>
#include <gnutls/abstract.h>
#include <gnutls/x509.h>
#include <linux/tls.h>

#include <glib.h>

#include "tlshd.h"
#include "netlink.h"

static void tlshd_client_anon_handshake(struct tlshd_handshake_parms *parms)
{
	gnutls_certificate_credentials_t xcred;
	gnutls_session_t session;
	unsigned int flags;
	int ret;

ret = gnutls_certificate_allocate_credentials(&xcred);
	if (ret != GNUTLS_E_SUCCESS) {
		tlshd_log_gnutls_error(ret);
		return;
	}

/*
	 * Don't reject self-signed server certificates.
	 */
	gnutls_certificate_set_verify_flags(xcred,
			GNUTLS_VERIFY_ALLOW_SIGN_RSA_MD2 | GNUTLS_VERIFY_ALLOW_SIGN_RSA_MD5);
	gnutls_certificate_set_flags(xcred,
			GNUTLS_CERTIFICATE_SKIP_KEY_CERT_MATCH | GNUTLS_CERTIFICATE_SKIP_OCSP_RESPONSE_CHECK);

ret = gnutls_certificate_set_x509_system_trust(xcred);
	if (ret < 0) {
		tlshd_log_gnutls_error(ret);
		goto out_free_creds;
	}
	tlshd_log_debug("System trust: Loaded %d certificate(s).", ret);

flags = GNUTLS_CLIENT;
	ret = gnutls_init(&session, flags);
	if (ret != GNUTLS_E_SUCCESS) {
		tlshd_log_gnutls_error(ret);
		goto out_free_creds;
	}
	gnutls_transport_set_int(session, parms->sockfd);

gnutls_server_name_set(session, GNUTLS_NAME_DNS,
			       parms->peername, strlen(parms->peername));

gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE, xcred);

ret = gnutls_set_default_priority(session);
	if (ret != GNUTLS_E_SUCCESS) {
		tlshd_log_gnutls_error(ret);
		return;
	}

gnutls_session_set_verify_cert(session, parms->peername, 0);

tlshd_start_tls_handshake(session, parms);

gnutls_deinit(session);

out_free_creds:
	gnutls_certificate_free_credentials(xcred);
}

static gnutls_privkey_t tlshd_privkey;
static gnutls_pcert_st tlshd_cert;

/*
 * XXX: After this point, tlshd_cert should be deinited on error.
 */
static bool tlshd_x509_client_get_cert(struct tlshd_handshake_parms *parms)
{
	if (parms->x509_cert != TLS_NO_CERT)
		return tlshd_keyring_get_cert(parms->x509_cert, &tlshd_cert);
	return tlshd_config_get_client_cert(&tlshd_cert);
}

/*
 * XXX: After this point, tlshd_privkey should be deinited on error.
 */
static bool tlshd_x509_client_get_privkey(struct tlshd_handshake_parms *parms)
{
	if (parms->x509_privkey != TLS_NO_PRIVKEY)
		return tlshd_keyring_get_privkey(parms->x509_privkey,
						 tlshd_privkey);
	return tlshd_config_get_client_privkey(&tlshd_privkey);
}

static void tlshd_x509_log_issuers(const gnutls_datum_t *req_ca_rdn, int nreqs)
{
	char issuer_dn[256];
	size_t len;
	int i, ret;

if (nreqs < 1)
		return;

tlshd_log_debug("Server's trusted authorities:");

for (i = 0; i < nreqs; i++) {
		len = sizeof(issuer_dn);
		ret = gnutls_x509_rdn_get(&req_ca_rdn[i], issuer_dn, &len);
		if (ret >= 0)
			tlshd_log_debug("   [%d]: %s", i, issuer_dn);
	}
}

/**
 * tlshd_x509_retrieve_key_cb - Initialize client's x.509 identity
 *
 * Callback function is of type gnutls_certificate_retrieve_function2
 *
 * Initial implementation based on the cert_callback() function in
 * gnutls/doc/examples/ex-cert-select.c.
 *
 * Sketched-in and untested.
 *
 * Return values:
 *   %0: Success; output parameters are set accordingly
 *   %-1: Failure
 */
static int
tlshd_x509_retrieve_key_cb(gnutls_session_t session,
			   const gnutls_datum_t *req_ca_rdn, int nreqs,
			   __attribute__ ((unused)) const gnutls_pk_algorithm_t *pk_algos,
			   __attribute__ ((unused)) int pk_algos_length,
			   gnutls_pcert_st **pcert,
			   unsigned int *pcert_length,
			   gnutls_privkey_t *privkey)
{
	gnutls_certificate_type_t type;

tlshd_x509_log_issuers(req_ca_rdn, nreqs);

type = gnutls_certificate_type_get(session);
	if (type != GNUTLS_CRT_X509)
		return -1;

*pcert_length = 1;
	*pcert = &tlshd_cert;
	*privkey = tlshd_privkey;
	return 0;
}

/**
 * tlshd_client_x509_verify_function - Verify remote's x.509 certificate
 * @session: session in the midst of a handshake
 *
 * Return values:
 *   %GNUTLS_E_SUCCESS: Incoming certificate has been successfully verified
 *   %GNUTLS_E_CERTIFICATE_ERROR: certificate verification failed
 */
static int tlshd_client_x509_verify_function(gnutls_session_t session)
{
	struct tlshd_handshake_parms *parms;
	const gnutls_datum_t *peercerts;
	gnutls_certificate_type_t type;
	unsigned int i, status;
	gnutls_datum_t out;
	int ret;

parms = gnutls_session_get_ptr(session);

ret = gnutls_certificate_verify_peers3(session, parms->peername,
					       &status);
	if (ret != GNUTLS_E_SUCCESS) {
		tlshd_log_gnutls_error(ret);
		return GNUTLS_E_CERTIFICATE_ERROR;
	}

type = gnutls_certificate_type_get(session);
        gnutls_certificate_verification_status_print(status, type, &out, 0);
        tlshd_log_debug("%s", out.data);
        gnutls_free(out.data);

if (status)
                return GNUTLS_E_CERTIFICATE_ERROR;

/* To do: Examine extended key usage information here, if we want
	 * to get picky. Kernel would have to tell us what to look for
	 * via a netlink attribute. */

peercerts = gnutls_certificate_get_peers(session,
						 &parms->num_remote_peerids);
	if (!peercerts || parms->num_remote_peerids == 0) {
		tlshd_log_debug("The peer cert list is empty.\n");
                return GNUTLS_E_CERTIFICATE_ERROR;
	}

tlshd_log_debug("The peer offered %u certificate(s).\n",
			parms->num_remote_peerids);

if (parms->num_remote_peerids > ARRAY_SIZE(parms->remote_peerid))
		parms->num_remote_peerids = ARRAY_SIZE(parms->remote_peerid);
	for (i = 0; i < parms->num_remote_peerids; i++) {
		gnutls_x509_crt_t cert;

gnutls_x509_crt_init(&cert);
		gnutls_x509_crt_import(cert, &peercerts[i], GNUTLS_X509_FMT_DER);
		parms->remote_peerid[i] =
			tlshd_keyring_create_cert(cert, parms->peername);
		gnutls_x509_crt_deinit(cert);
	}

return GNUTLS_E_SUCCESS;
}

static void tlshd_client_x509_handshake(struct tlshd_handshake_parms *parms)
{
	gnutls_certificate_credentials_t xcred;
	gnutls_session_t session;
	unsigned int flags;
	int ret;

ret = gnutls_certificate_allocate_credentials(&xcred);
	if (ret != GNUTLS_E_SUCCESS) {
		tlshd_log_gnutls_error(ret);
		return;
	}

ret = gnutls_certificate_set_x509_system_trust(xcred);
	if (ret < 0) {
		tlshd_log_gnutls_error(ret);
		goto out_free_creds;
	}
	tlshd_log_debug("System trust: Loaded %d certificate(s).", ret);

if (!tlshd_x509_client_get_cert(parms))
		goto out_free_creds;
	if (!tlshd_x509_client_get_privkey(parms))
		goto out_free_creds;
	gnutls_certificate_set_retrieve_function2(xcred,
						  tlshd_x509_retrieve_key_cb);

flags = GNUTLS_CLIENT;
	ret = gnutls_init(&session, flags);
	if (ret != GNUTLS_E_SUCCESS) {
		tlshd_log_gnutls_error(ret);
		goto out_free_creds;
	}
	gnutls_transport_set_int(session, parms->sockfd);
	gnutls_session_set_ptr(session, parms);

gnutls_server_name_set(session, GNUTLS_NAME_DNS,
			       parms->peername, strlen(parms->peername));
	gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE, xcred);
	gnutls_certificate_set_verify_function(xcred,
					       tlshd_client_x509_verify_function);

tlshd_start_tls_handshake(session, parms);

gnutls_deinit(session);

out_free_creds:
	gnutls_certificate_free_credentials(xcred);
}

static void tlshd_client_psk_handshake_one(struct tlshd_handshake_parms *parms,
					   key_serial_t peerid)
{
	gnutls_psk_client_credentials_t psk_cred;
	gnutls_session_t session;
	gnutls_datum_t key;
	unsigned int flags;
	char *identity;
	int ret;

if (!tlshd_keyring_get_psk_username(peerid, &identity)) {
		tlshd_log_error("Failed to get key identity");
		return;
	}

if (!tlshd_keyring_get_psk_key(peerid, &key)) {
		tlshd_log_error("Failed to read key");
		free(identity);
		return;
	}

ret = gnutls_psk_allocate_client_credentials(&psk_cred);
	if (ret != GNUTLS_E_SUCCESS) {
		tlshd_log_gnutls_error(ret);
		free(identity);
		return;
	}

ret = gnutls_psk_set_client_credentials(psk_cred, identity, &key,
						GNUTLS_PSK_KEY_RAW);
	if (ret != GNUTLS_E_SUCCESS) {
		tlshd_log_gnutls_error(ret);
		goto out_free_creds;
	}

tlshd_log_debug("start ClientHello handshake");
	tlshd_start_tls_handshake(session, parms);
	if (!parms->session_status) {
		/* PSK uses the same identity for both client and server */
		parms->num_remote_peerids = 1;
		parms->remote_peerid[0] = peerid;
	}

gnutls_deinit(session);

out_free_creds:
	gnutls_psk_free_client_credentials(psk_cred);
	free(identity);
}

static void tlshd_client_psk_handshake(struct tlshd_handshake_parms *parms)
{
	unsigned int i;

if (!parms->peerids) {
		tlshd_log_error("No key identities");
		return;
	}

/*
	 * GnuTLS does not yet support multiple offered PskIdentities.
	 * Retry ClientHello with each identity on the kernel's list.
	 */
	for (i = 0; i < parms->num_peerids; i++) {
		tlshd_client_psk_handshake_one(parms, parms->peerids[i]);
		if (parms->session_status != EACCES)
			break;
	}
}

/**
 * tlshd_clienthello_handshake - send a TLSv1.3 ClientHello
 * @parms: handshake parameters
 *
 */
void tlshd_clienthello_handshake(struct tlshd_handshake_parms *parms)
{
	int ret;

ret = gnutls_global_init();
	if (ret != GNUTLS_E_SUCCESS) {
		tlshd_log_gnutls_error(ret);
		return;
	}

if (tlshd_tls_debug)
		gnutls_global_set_log_level(tlshd_tls_debug);
	gnutls_global_set_log_function(tlshd_gnutls_log_func);
	gnutls_global_set_audit_log_function(tlshd_gnutls_audit_func);

tlshd_log_debug("System config file: %s", gnutls_get_system_config_file());

switch (parms->auth_mode) {
	case HANDSHAKE_AUTH_UNAUTH:
		tlshd_client_anon_handshake(parms);
		break;
	case HANDSHAKE_AUTH_X509:
		tlshd_client_x509_handshake(parms);
		break;
	case HANDSHAKE_AUTH_PSK:
		tlshd_client_psk_handshake(parms);
		break;
	default:
		tlshd_log_debug("Unrecognized auth mode (%d)",
				parms->auth_mode);
	}

gnutls_global_deinit();
}
07070100000019000081A4000000000000000000000001646518CA000021D3000000000000000000000000000000000000002200000000ktls-utils-0.9/src/tlshd/config.c/*
 * Parse tlshd's config file.
 *
 * Copyright (c) 2022 Oracle and/or its affiliates.
 *
 * ktls-utils is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; version 2.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301, USA.
 */

#include "config.h"

#include <sys/types.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/syscall.h>

#include <stdbool.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <fcntl.h>
#include <errno.h>
#include <string.h>
#include <libgen.h>
#include <keyutils.h>

#include <gnutls/gnutls.h>
#include <gnutls/abstract.h>

#include <netlink/netlink.h>

#include <glib.h>

#include "tlshd.h"

static GKeyFile *tlshd_configuration;

/**
 * tlshd_config_init - Read tlshd's config file
 * @pathname: Pathname to config file
 *
 * Return values:
 *   %true: Config file read successfully
 *   %false: Unable to read config file
 */
bool tlshd_config_init(const gchar *pathname)
{
	gchar **keyrings;
	gsize i, length;
	GError *error;

tlshd_configuration = g_key_file_new();

error = NULL;
	if (!g_key_file_load_from_file(tlshd_configuration, pathname,
				       G_KEY_FILE_KEEP_COMMENTS,
				       &error)) {
		tlshd_log_gerror("Failed to load config file", error);
		g_error_free(error);
		return false;
	}

/*
	 * These calls return zero if the key isn't present or the
	 * specified key value is invalid.
	 */
	tlshd_debug = g_key_file_get_integer(tlshd_configuration, "main",
					     "debug", NULL);
	tlshd_tls_debug = g_key_file_get_integer(tlshd_configuration,
						 "main", "tlsdebug", NULL);
	nl_debug = g_key_file_get_integer(tlshd_configuration, "main",
					  "nl_debug", NULL);

keyrings = g_key_file_get_string_list(tlshd_configuration, "main",
					      "keyrings", &length, NULL);
	if (keyrings) {
		for (i = 0; i < length; i++) {
			tlshd_keyring_link_session(keyrings[i]);
		}
		g_strfreev(keyrings);
	}

return true;
}

void tlshd_config_shutdown(void)
{
	g_key_file_free(tlshd_configuration);
}

#if HAVE_LINUX_OPENAT2_H
#include <linux/openat2.h>

#ifndef SYS_openat2
#define SYS_openat2 __NR_openat2
#endif

static int tlshd_file_open(const char *pathname)
{
	static const struct open_how how = {
		.flags		= O_RDONLY,
		.resolve	= RESOLVE_NO_SYMLINKS,
	};

return (int)syscall(SYS_openat2, 0, pathname, &how, sizeof(how));
}
#else
static int tlshd_file_open(const char *pathname)
{
	return open(pathname, O_RDONLY);
}
#endif

/*
 * Expected file attributes
 */
#define TLSHD_OWNER		0	/* root */
#define TLSHD_CERT_MODE		(S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH)
#define TLSHD_PRIVKEY_MODE	(S_IRUSR|S_IWUSR)

/*
 * On success, caller must release buffer returned in @data by calling free(3)
 */
static bool tlshd_config_read_datum(const char *pathname, gnutls_datum_t *data,
				    uid_t owner, mode_t mode)
{
	struct stat statbuf;
	unsigned int size;
	void *buf;
	bool ret;
	int fd;

ret = false;

fd = tlshd_file_open(pathname);
	if (fd == -1) {
		tlshd_log_perror("open");
		goto out;
	}
	if (fstat(fd, &statbuf)) {
		tlshd_log_perror("stat");
		goto out_close;
	}
	if (statbuf.st_size < 0 || statbuf.st_size > UINT_MAX) {
		tlshd_log_error("Bad config file size: %lld", statbuf.st_size);
		goto out_close;
	}
	size = (unsigned int)statbuf.st_size;
	if (statbuf.st_uid != owner)
		tlshd_log_notice("File %s: expected owner %u",
				 pathname, owner);
	if ((statbuf.st_mode & ALLPERMS) != mode)
		tlshd_log_notice("File %s: expected mode %o",
				 pathname, mode);
	buf = malloc(size);
	if (!buf) {
		errno = ENOMEM;
		tlshd_log_perror("malloc");
		goto out_close;
	}
	if (read(fd, buf, size) == -1) {
		tlshd_log_perror("read");
		free(buf);
		goto out_close;
	}
	data->data = buf;
	data->size = size;
	ret = true;

out_close:
	close(fd);
out:
	return ret;
}

/**
 * tlshd_config_get_client_cert - Get cert for ClientHello from .conf
 * @cert: OUT: in-memory certificate
 *
 * Return values:
 *   %true: certificate retrieved successfully
 *   %false: certificate not retrieved
 */
bool tlshd_config_get_client_cert(gnutls_pcert_st *cert)
{
	GError *error = NULL;
	gnutls_datum_t data;
	gchar *pathname;
	int ret;

pathname = g_key_file_get_string(tlshd_configuration, "authenticate.client",
					"x509.certificate", &error);
	if (!pathname) {
		tlshd_log_gerror("Default certificate not found", error);
		g_error_free(error);
		return false;
	}

if (!tlshd_config_read_datum(pathname, &data, TLSHD_OWNER,
				     TLSHD_CERT_MODE))
		return false;

/* Config file supports only PEM-encoded certificates */
	ret = gnutls_pcert_import_x509_raw(cert, &data,
					   GNUTLS_X509_FMT_PEM, 0);
	free(data.data);
	if (ret != GNUTLS_E_SUCCESS) {
		tlshd_log_gnutls_error(ret);
		return false;
	}

tlshd_log_debug("Retrieved x.509 certificate from %s", pathname);
	return true;
}

/**
 * tlshd_config_get_client_privkey - Get private key for ClientHello from .conf
 * @privkey: OUT: in-memory private key
 *
 * Return values:
 *   %true: private key retrieved successfully
 *   %false: private key not retrieved
 */
bool tlshd_config_get_client_privkey(gnutls_privkey_t *privkey)
{
	GError *error = NULL;
	gnutls_datum_t data;
	gchar *pathname;
	int ret;

pathname = g_key_file_get_string(tlshd_configuration, "authenticate.client",
					"x509.private_key", &error);
	if (!pathname) {
		tlshd_log_gerror("Default private key not found", error);
		g_error_free(error);
		return false;
	}

if (!tlshd_config_read_datum(pathname, &data, TLSHD_OWNER,
				     TLSHD_PRIVKEY_MODE))
		return false;

ret = gnutls_privkey_init(privkey);
	if (ret != GNUTLS_E_SUCCESS) {
		tlshd_log_gnutls_error(ret);
		free(data.data);
		return false;
	}

/* Config file supports only PEM-encoded keys */
	ret = gnutls_privkey_import_x509_raw(*privkey, &data,
					     GNUTLS_X509_FMT_PEM, NULL, 0);
	free(data.data);
	if (ret != GNUTLS_E_SUCCESS) {
		tlshd_log_gnutls_error(ret);
		return false;
	}

tlshd_log_debug("Retrieved private key from %s", pathname);
	return true;
}

/**
 * tlshd_config_get_server_cert - Get cert for ServerHello from .conf
 * @cert: OUT: in-memory certificate
 *
 * Return values:
 *   %true: certificate retrieved successfully
 *   %false: certificate not retrieved
 */
bool tlshd_config_get_server_cert(gnutls_pcert_st *cert)
{
	GError *error = NULL;
	gnutls_datum_t data;
	gchar *pathname;
	int ret;

pathname = g_key_file_get_string(tlshd_configuration, "authenticate.server",
					"x509.certificate", &error);
	if (!pathname) {
		tlshd_log_gerror("Default certificate not found", error);
		g_error_free(error);
		return false;
	}

if (!tlshd_config_read_datum(pathname, &data, TLSHD_OWNER,
				     TLSHD_CERT_MODE))
		return false;

tlshd_log_debug("Retrieved x.509 certificate from %s", pathname);
	return true;
}

/**
 * tlshd_config_get_server_privkey - Get private key for ServerHello from .conf
 * @privkey: OUT: in-memory private key
 *
 * Return values:
 *   %true: private key retrieved successfully
 *   %false: private key not retrieved
 */
bool tlshd_config_get_server_privkey(gnutls_privkey_t *privkey)
{
	GError *error = NULL;
	gnutls_datum_t data;
	gchar *pathname;
	int ret;

pathname = g_key_file_get_string(tlshd_configuration, "authenticate.server",
					"x509.private_key", &error);
	if (!pathname) {
		tlshd_log_gerror("Default private key not found", error);
		g_error_free(error);
		return false;
	}

if (!tlshd_config_read_datum(pathname, &data, TLSHD_OWNER,
				     TLSHD_PRIVKEY_MODE))
		return false;

ret = gnutls_privkey_init(privkey);
	if (ret != GNUTLS_E_SUCCESS) {
		tlshd_log_gnutls_error(ret);
		free(data.data);
		return false;
	}

tlshd_log_debug("Retrieved private key from %s", pathname);
	return true;
}
0707010000001A000081A4000000000000000000000001646518CA00000DE8000000000000000000000000000000000000002500000000ktls-utils-0.9/src/tlshd/handshake.c/*
 * Service a request for a TLS handshake on behalf of an
 * in-kernel TLS consumer.
 *
 * Copyright (c) 2022 Oracle and/or its affiliates.
 *
 * ktls-utils is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; version 2.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301, USA.
 */

#include "config.h"

#include <sys/types.h>
#include <sys/socket.h>

#include <stdbool.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <errno.h>

#include <netinet/tcp.h>
#include <netdb.h>
#include <keyutils.h>

#include <gnutls/gnutls.h>
#include <gnutls/abstract.h>

#include <glib.h>

#include "tlshd.h"
#include "netlink.h"

static void tlshd_set_nagle(gnutls_session_t session, int val)
{
	int ret;

ret = setsockopt(gnutls_transport_get_int(session),
			 IPPROTO_TCP, TCP_NODELAY, &val, sizeof(val));
	if (ret < 0)
		tlshd_log_perror("setsockopt (NODELAY)");
}

static void tlshd_save_nagle(gnutls_session_t session, int *saved)
{
	socklen_t len;
	int ret;

len = sizeof(saved);
	ret = getsockopt(gnutls_transport_get_int(session),
			 IPPROTO_TCP, TCP_NODELAY, saved, &len);
	if (ret < 0) {
		tlshd_log_perror("getsockopt (NODELAY)");
		saved = 0;
		return;
	}

tlshd_set_nagle(session, 1);
}

/**
 * tlshd_start_tls_handshake - Drive the handshake interaction
 * @session: TLS session to initialize
 * @parms: handshake parameters
 *
 */
void tlshd_start_tls_handshake(gnutls_session_t session,
			       struct tlshd_handshake_parms *parms)
{
	int saved, ret;
	char *desc;

ret = tlshd_gnutls_priority_set(session, parms);
	if (ret != GNUTLS_E_SUCCESS) {
		tlshd_log_gnutls_error(ret);
		return;
	}

gnutls_handshake_set_timeout(session, parms->timeout_ms);
	tlshd_save_nagle(session, &saved);
	do {
		ret = gnutls_handshake(session);
	} while (ret < 0 && !gnutls_error_is_fatal(ret));
	tlshd_set_nagle(session, saved);
	if (ret < 0) {
		switch (ret) {
		case GNUTLS_E_CERTIFICATE_VERIFICATION_ERROR:
			tlshd_log_cert_verification_error(session);
			break;
		default:
			tlshd_log_gnutls_error(ret);
		}
		parms->session_status = EACCES;
		return;
	}

desc = gnutls_session_get_desc(session);
	tlshd_log_debug("Session description: %s", desc);
	gnutls_free(desc);

parms->session_status = tlshd_initialize_ktls(session);
}

/**
 * tlshd_service_socket - Service a kernel socket needing a key operation
 *
 */
void tlshd_service_socket(void)
{
	struct tlshd_handshake_parms parms;

if (tlshd_genl_get_handshake_parms(&parms) != 0)
		goto out;

switch (parms.handshake_type) {
	case HANDSHAKE_MSG_TYPE_CLIENTHELLO:
		tlshd_clienthello_handshake(&parms);
		break;
	case HANDSHAKE_MSG_TYPE_SERVERHELLO:
		tlshd_serverhello_handshake(&parms);
		break;
	default:
		tlshd_log_debug("Unrecognized handshake type (%d)",
				parms.handshake_type);
	}

out:
	tlshd_genl_done(&parms);

free(parms.peerids);

if (parms.session_status) {
		tlshd_log_failure(parms.peername, parms.peeraddr,
				  parms.peeraddr_len);
		return;
	}
	tlshd_log_success(parms.peername, parms.peeraddr, parms.peeraddr_len);
}
0707010000001B000081A4000000000000000000000001646518CA00001A63000000000000000000000000000000000000002300000000ktls-utils-0.9/src/tlshd/keyring.c/*
 * Scrape authentication information from kernel keyring.
 *
 * Copyright (c) 2022 Oracle and/or its affiliates.
 *
 * ktls-utils is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; version 2.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301, USA.
 */

#include "config.h"

#include <sys/types.h>
#include <sys/socket.h>

#include <stdbool.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <errno.h>
#include <netdb.h>
#include <keyutils.h>

#include <gnutls/gnutls.h>
#include <gnutls/abstract.h>

#include <glib.h>

#include "tlshd.h"

/**
 * tlshd_keyring_get_psk_username - Retrieve username for PSK handshake
 * @serial: Key serial number to look up
 * @username: On success, filled in with NUL-terminated user name
 *
 * Caller must use gnutls_free() to free @username when finished.
 *
 * Return values:
 *   %true: Success; @username has been initialized
 *   %false: Failure
 */
bool tlshd_keyring_get_psk_username(key_serial_t serial, char **username)
{
	char *ptr, *psk_name;
	int ret;

ret = keyctl_describe_alloc(serial, &psk_name);
	if (ret < 0) {
		tlshd_log_perror("keyctl_describe_alloc");
		tlshd_log_debug("Failed to describe key %08x.", serial);
		return false;
	}
	ptr = strrchr(psk_name, ';');
	if (!ptr)
		ptr = psk_name;
	else
		ptr++;

*username = gnutls_malloc(strlen(ptr) + 1);
	if (!*username) {
		tlshd_log_error("Failed to allocate TLS psk identity.");
		free(psk_name);
		return false;
	}
	tlshd_log_debug("Using psk identity %s\n", ptr);
	strcpy(*username, ptr);
	free(psk_name);
	return true;
}

/**
 * tlshd_keyring_get_psk_key - Retrieve pre-shared key for PSK handshake
 * @serial: Key serial number to look up
 * @key: On success, filled in with pre-shared key
 *
 * Caller must use free() to free @key->data when finished.
 *
 * Return values:
 *   %true: Success; @key has been initialized
 *   %false: Failure
 */
bool tlshd_keyring_get_psk_key(key_serial_t serial, gnutls_datum_t *key)
{
	void *tmp;
	int ret;

key->data = NULL;
	key->size = 0;

ret = keyctl_read_alloc(serial, &tmp);
	if (ret < 0) {
		tlshd_log_perror("keyctl_read_alloc");
		tlshd_log_error("Failed to read TLS psk data.");
		return false;
	}

key->data = tmp;
	key->size = (unsigned int)ret;
	return true;
}

/**
 * tlshd_keyring_get_privkey - Retrieve privkey for x.509 handshake
 * @serial: Key serial number to look up
 * @privkey: On success, filled in with a private key
 *
 * Caller must use gnutls_privkey_deinit() to free @privkey when finished.
 *
 * Return values:
 *   %true: Success; @privkey has been initialized
 *   %false: Failure
 */
bool tlshd_keyring_get_privkey(key_serial_t serial, gnutls_privkey_t privkey)
{
	gnutls_datum_t data;
	void *tmp;
	int ret;

ret = keyctl_read_alloc(serial, &tmp);
	if (ret < 0) {
		tlshd_log_perror("keyctl_read_alloc");
		tlshd_log_error("Failed to read TLS x.509 private key.");
		return false;
	}
	data.data = tmp;
	data.size = (unsigned int)ret;

ret = gnutls_privkey_init(&privkey);
	if (ret != GNUTLS_E_SUCCESS) {
		tlshd_log_gnutls_error(ret);
		free(tmp);
		return false;
	}

/* Handshake upcall passes only DER-encoded keys */
	ret = gnutls_privkey_import_x509_raw(privkey, &data, GNUTLS_X509_FMT_DER,
					     NULL, 0);
	free(tmp);
	if (ret != GNUTLS_E_SUCCESS) {
		tlshd_log_gnutls_error(ret);
		return false;
	}

tlshd_log_debug("Retrieved private key");
	return true;
}

/**
 * tlshd_keyring_get_cert - Retrieve cert for x.509 handshake
 * @serial: Key serial number to look up
 * @cert: On success, filled in with certificate
 *
 * Caller must use gnutls_pcert_deinit() to free @cert when finished.
 *
 * Return values:
 *   %true: Success; @cert has been initialized
 *   %false: Failure
 */
bool tlshd_keyring_get_cert(key_serial_t serial, gnutls_pcert_st *cert)
{
	gnutls_datum_t data;
	void *tmp;
	int ret;

ret = keyctl_read_alloc(serial, &tmp);
	if (ret < 0) {
		tlshd_log_perror("keyctl_read_alloc");
		tlshd_log_error("Failed to read TLS x.509 certificate.");
		return false;
	}
	data.data = tmp;
	data.size = (unsigned int)ret;

/* Handshake upcall passes only DER-encoded certificates */
	ret = gnutls_pcert_import_x509_raw(cert, &data,
					   GNUTLS_X509_FMT_DER, 0);
	free(tmp);
	if (ret != GNUTLS_E_SUCCESS) {
		tlshd_log_gnutls_error(ret);
		return false;
	}

tlshd_log_debug("Retrieved x.509 certificate");
	return true;
}

/**
 * tlshd_keyring_create_cert - Create key containing peer's certificate
 * @cert: Initialized x.509 certificate
 * @peername: hostname of the remote peer
 *
 * Returns a positive key serial number on success; otherwise
 * TLS_NO_PEERID.
 */
key_serial_t tlshd_keyring_create_cert(gnutls_x509_crt_t cert,
				       const char *peername)
{
	key_serial_t serial = TLS_NO_PEERID;
	char description[NI_MAXHOST + 10];
	gnutls_datum_t out;
	int len, ret;

len = snprintf(description, sizeof(description) - 1,
		       "TLS x509 %s", peername);
	if (len < 0 || (size_t)len >= sizeof(description)) {
		tlshd_log_error("Failed to construct key description.");
		goto out;
	}

ret = gnutls_x509_crt_export2(cert, GNUTLS_X509_FMT_DER, &out);
	if (ret != GNUTLS_E_SUCCESS) {
		tlshd_log_gnutls_error(ret);
		goto out;
	}

serial = add_key("asymmetric", description, out.data, out.size,
			 KEY_SPEC_USER_KEYRING);
	if (serial == -1) {
		tlshd_log_perror("add_key");
		serial = TLS_NO_PEERID;
	}

gnutls_free(out.data);
out:
	return serial;
}

/**
 * tlshd_keyring_link_session - Link a keyring into the session keyring
 * @serial: serial number of the keyring to be linked
 *
 * Returns 0 on success and -1 on error.
 */
int tlshd_keyring_link_session(const char *keyring)
{
	key_serial_t serial;
	char buf[1024];
	long ret;

if (!keyring) {
		tlshd_log_error("No keyring specified");
		errno = -EINVAL;
		return -1;
	}

serial = find_key_by_type_and_desc("keyring", keyring, 0);
	if (!serial) {
		tlshd_log_debug("Failed to lookup keyring '%s'\n",
				keyring);
		errno = -ENOKEY;
		return -1;
	}

ret = keyctl_link(serial, KEY_SPEC_SESSION_KEYRING);
	if (ret < 0) {
		tlshd_log_debug("Failed to link keyring %s (%lx) error %d\n",
				buf, serial, errno);
		return -1;
	}

tlshd_log_debug("Keyring '%s' linked into our session keyring.\n", buf);
	return 0;
}
0707010000001C000081A4000000000000000000000001646518CA00003029000000000000000000000000000000000000002000000000ktls-utils-0.9/src/tlshd/ktls.c/*
 * Initialize a kTLS socket. In some cases initialization might
 * be handled by the TLS library.
 *
 * Copyright (c) 2022 Oracle and/or its affiliates.
 *
 * ktls-utils is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; version 2.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301, USA.
 */

#include "config.h"

#include <sys/types.h>
#include <sys/socket.h>

#include <stdbool.h>
#include <string.h>
#include <errno.h>

#include <netinet/tcp.h>
#include <keyutils.h>

#include <gnutls/gnutls.h>
#include <gnutls/socket.h>
#include <gnutls/abstract.h>

#include <linux/tls.h>

#include <glib.h>

#include "tlshd.h"
#include "netlink.h"

static char *tlshd_string_concat(char *str1, const char *str2)
{
	size_t len = 0;
	char *result;

if (!str1 && !str2)
		return NULL;

if (str1)
		len += strlen(str1);
	if (str2)
		len += strlen(str2);

result = malloc(len + 1);
	if (result) {
		result[0] = '\0';
		if (str1)
			strcat(result, str1);
		if (str2)
			strcat(result, str2);
	}

free(str1);
	return result;
}

#ifdef HAVE_GNUTLS_TRANSPORT_IS_KTLS_ENABLED
static bool tlshd_is_ktls_enabled(gnutls_session_t session, unsigned read)
{
	int ret;

ret = gnutls_transport_is_ktls_enabled(session);
	if (ret == GNUTLS_E_UNIMPLEMENTED_FEATURE)
		return false;

if (read) {
		if (!(ret & GNUTLS_KTLS_RECV))
			return false;
		tlshd_log_debug("Library has enabled receive kTLS for this session.");
	} else {
		if (!(ret & GNUTLS_KTLS_SEND))
			return false;
		tlshd_log_debug("Library has enabled send kTLS for this session.");
	}
	return true;
}

#else
static bool tlshd_is_ktls_enabled(__attribute__ ((unused)) gnutls_session_t session,
				  __attribute__ ((unused)) unsigned read)
{
	return false;
}
#endif

static bool tlshd_setsockopt(int sock, unsigned read, const void *info,
			     socklen_t infolen)
{
	int ret;

ret = setsockopt(sock, SOL_TLS, read ? TLS_RX : TLS_TX, info, infolen);
	if (!ret)
		return true;

switch (errno) {
	case EBADF:
	case ENOTSOCK:
		tlshd_log_error("The kernel's socket file descriptor is no longer valid.");
		break;
	case EINVAL:
	case ENOENT:
	case ENOPROTOOPT:
		tlshd_log_error("The kernel does not support the requested algorithm.");
		break;
	default:
		tlshd_log_perror("setsockopt");
	}
	return false;
}

#if defined(TLS_CIPHER_AES_GCM_128)
static bool tlshd_set_aes_gcm128_info(gnutls_session_t session, int sock,
				      unsigned read)
{
	struct tls12_crypto_info_aes_gcm_128 info = {
		.info.version		= TLS_1_3_VERSION,
		.info.cipher_type	= TLS_CIPHER_AES_GCM_128,
	};
	unsigned char seq_number[8];
	gnutls_datum_t cipher_key;
	gnutls_datum_t mac_key;
	gnutls_datum_t iv;
	int ret;

if (tlshd_is_ktls_enabled(session, read))
		return true;

ret = gnutls_record_get_state(session, read, &mac_key, &iv,
				      &cipher_key, seq_number);
	if (ret != GNUTLS_E_SUCCESS) {
		tlshd_log_gnutls_error(ret);
		return false;
	}

/* TLSv1.2 generates iv in the kernel */
	if (gnutls_protocol_get_version(session) == GNUTLS_TLS1_2) {
		info.info.version = TLS_1_2_VERSION;
		memcpy(info.iv, seq_number, TLS_CIPHER_AES_GCM_128_IV_SIZE);
	} else
		memcpy(info.iv, iv.data + TLS_CIPHER_AES_GCM_128_SALT_SIZE,
		       TLS_CIPHER_AES_GCM_128_IV_SIZE);
	memcpy(info.salt, iv.data, TLS_CIPHER_AES_GCM_128_SALT_SIZE);
	memcpy(info.key, cipher_key.data, TLS_CIPHER_AES_GCM_128_KEY_SIZE);
	memcpy(info.rec_seq, seq_number, TLS_CIPHER_AES_GCM_128_REC_SEQ_SIZE);

return tlshd_setsockopt(sock, read, &info, sizeof(info));
}
#endif

#if defined(TLS_CIPHER_AES_GCM_256)
static bool tlshd_set_aes_gcm256_info(gnutls_session_t session, int sock,
				      unsigned read)
{
	struct tls12_crypto_info_aes_gcm_256 info = {
		.info.version		= TLS_1_3_VERSION,
		.info.cipher_type	= TLS_CIPHER_AES_GCM_256,
	};
	unsigned char seq_number[8];
	gnutls_datum_t cipher_key;
	gnutls_datum_t mac_key;
	gnutls_datum_t iv;
	int ret;

if (tlshd_is_ktls_enabled(session, read))
		return true;

ret = gnutls_record_get_state(session, read, &mac_key, &iv,
				      &cipher_key, seq_number);
	if (ret != GNUTLS_E_SUCCESS) {
		tlshd_log_gnutls_error(ret);
		return false;
	}

/* TLSv1.2 generates iv in the kernel */
	if (gnutls_protocol_get_version(session) == GNUTLS_TLS1_2) {
		info.info.version = TLS_1_2_VERSION;
		memcpy(info.iv, seq_number, TLS_CIPHER_AES_GCM_256_IV_SIZE);
	} else
		memcpy(info.iv, iv.data + TLS_CIPHER_AES_GCM_256_SALT_SIZE,
		       TLS_CIPHER_AES_GCM_256_IV_SIZE);
	memcpy(info.salt, iv.data, TLS_CIPHER_AES_GCM_256_SALT_SIZE);
	memcpy(info.key, cipher_key.data, TLS_CIPHER_AES_GCM_256_KEY_SIZE);
	memcpy(info.rec_seq, seq_number, TLS_CIPHER_AES_GCM_256_REC_SEQ_SIZE);

return tlshd_setsockopt(sock, read, &info, sizeof(info));
}
#endif

#if defined(TLS_CIPHER_AES_CCM_128)
static bool tlshd_set_aes_ccm128_info(gnutls_session_t session, int sock,
				      unsigned read)
{
	struct tls12_crypto_info_aes_ccm_128 info = {
		.info.version		= TLS_1_3_VERSION,
		.info.cipher_type	= TLS_CIPHER_AES_CCM_128,
	};
	unsigned char seq_number[8];
	gnutls_datum_t cipher_key;
	gnutls_datum_t mac_key;
	gnutls_datum_t iv;
	int ret;

if (tlshd_is_ktls_enabled(session, read))
		return true;

ret = gnutls_record_get_state(session, read, &mac_key, &iv,
				      &cipher_key, seq_number);
	if (ret != GNUTLS_E_SUCCESS) {
		tlshd_log_gnutls_error(ret);
		return false;
	}

/* TLSv1.2 generates iv in the kernel */
	if (gnutls_protocol_get_version(session) == GNUTLS_TLS1_2) {
		info.info.version = TLS_1_2_VERSION;
		memcpy(info.iv, seq_number, TLS_CIPHER_AES_CCM_128_IV_SIZE);
	} else
		memcpy(info.iv, iv.data + TLS_CIPHER_AES_CCM_128_SALT_SIZE,
		       TLS_CIPHER_AES_CCM_128_IV_SIZE);
	memcpy(info.salt, iv.data, TLS_CIPHER_AES_CCM_128_SALT_SIZE);
	memcpy(info.key, cipher_key.data, TLS_CIPHER_AES_CCM_128_KEY_SIZE);
	memcpy(info.rec_seq, seq_number, TLS_CIPHER_AES_CCM_128_REC_SEQ_SIZE);

return tlshd_setsockopt(sock, read, &info, sizeof(info));
}
#endif

#if defined(TLS_CIPHER_CHACHA20_POLY1305)
static bool tlshd_set_chacha20_poly1305_info(gnutls_session_t session, int sock,
					     unsigned read)
{
	struct tls12_crypto_info_chacha20_poly1305 info = {
		.info.version		= TLS_1_3_VERSION,
		.info.cipher_type	= TLS_CIPHER_CHACHA20_POLY1305,
	};
	unsigned char seq_number[8];
	gnutls_datum_t cipher_key;
	gnutls_datum_t mac_key;
	gnutls_datum_t iv;
	int ret;

if (tlshd_is_ktls_enabled(session, read))
		return true;

ret = gnutls_record_get_state(session, read, &mac_key, &iv,
				      &cipher_key, seq_number);
	if (ret != GNUTLS_E_SUCCESS) {
		tlshd_log_gnutls_error(ret);
		return false;
	}

if (gnutls_protocol_get_version(session) == GNUTLS_TLS1_2)
		info.info.version = TLS_1_2_VERSION;

memcpy(info.iv, iv.data, TLS_CIPHER_CHACHA20_POLY1305_IV_SIZE);
	memcpy(info.key, cipher_key.data, TLS_CIPHER_CHACHA20_POLY1305_KEY_SIZE);
	memcpy(info.rec_seq, seq_number, TLS_CIPHER_CHACHA20_POLY1305_REC_SEQ_SIZE);

return tlshd_setsockopt(sock, read, &info, sizeof(info));
}
#endif

/**
 * tlshd_initialize_ktls - Initialize socket for use by kTLS
 * @session: TLS session descriptor
 *
 * Returns zero on success, or a positive errno value.
 */
unsigned int tlshd_initialize_ktls(gnutls_session_t session)
{
	int sockin, sockout;

if (setsockopt(gnutls_transport_get_int(session), SOL_TCP, TCP_ULP,
		       "tls", sizeof("tls")) == -1) {
		tlshd_log_perror("setsockopt(TLS_ULP)");
		return EIO;
	}

gnutls_transport_get_int2(session, &sockin, &sockout);

switch (gnutls_cipher_get(session)) {
#if defined(TLS_CIPHER_AES_GCM_128)
	case GNUTLS_CIPHER_AES_128_GCM:
		return tlshd_set_aes_gcm128_info(session, sockout, 0) &&
			tlshd_set_aes_gcm128_info(session, sockin, 1) ? 0 : EIO;
#endif
#if defined(TLS_CIPHER_AES_GCM_256)
	case GNUTLS_CIPHER_AES_256_GCM:
		return tlshd_set_aes_gcm256_info(session, sockout, 0) &&
			tlshd_set_aes_gcm256_info(session, sockin, 1) ? 0 : EIO;
#endif
#if defined(TLS_CIPHER_AES_CCM_128)
	case GNUTLS_CIPHER_AES_128_CCM:
		return tlshd_set_aes_ccm128_info(session, sockout, 0) &&
			tlshd_set_aes_ccm128_info(session, sockin, 1) ? 0 : EIO;
#endif
#if defined(TLS_CIPHER_CHACHA20_POLY1305)
	case GNUTLS_CIPHER_CHACHA20_POLY1305:
		return tlshd_set_chacha20_poly1305_info(session, sockout, 0) &&
			tlshd_set_chacha20_poly1305_info(session, sockin, 1) ? 0 : EIO;
#endif
	default:
		tlshd_log_error("tlshd does not support the requested cipher.");
	}

return EIO;
}

static char *tlshd_cipher_string_emit(char *pstring, unsigned int cipher)
{
	switch (cipher) {
#if defined(TLS_CIPHER_CHACHA20_POLY1305)
	case GNUTLS_CIPHER_CHACHA20_POLY1305:
		return tlshd_string_concat(pstring, ":+CHACHA20-POLY1305");
#endif
#if defined(TLS_CIPHER_AES_GCM_256)
	case GNUTLS_CIPHER_AES_256_GCM:
		return tlshd_string_concat(pstring, ":+AES-256-GCM");

#endif
#if defined(TLS_CIPHER_AES_GCM_128)
	case GNUTLS_CIPHER_AES_128_GCM:
		return tlshd_string_concat(pstring, ":+AES-128-GCM");
#endif
#if defined(TLS_CIPHER_AES_CCM_128)
	case GNUTLS_CIPHER_AES_128_CCM:
		return tlshd_string_concat(pstring, ":+AES-128-CCM");
#endif
	}

return pstring;
}

static gnutls_priority_t	tlshd_gnutls_priority_x509;
static gnutls_priority_t	tlshd_gnutls_priority_psk;

/**
 * tlshd_gnutls_priority_init - Initialize GnuTLS priority caches
 *
 */
int tlshd_gnutls_priority_init(void)
{
	const unsigned int *ciphers;
	gnutls_priority_t pcache;
	const char *errpos;
	char *pstring;
	int ret, i;

/* Retrieve the system default priority settings */
	ret = gnutls_priority_init(&pcache, NULL, &errpos);
	if (ret != GNUTLS_E_SUCCESS) {
		tlshd_log_gnutls_error(ret);
		return -EIO;
	}

ret = gnutls_priority_cipher_list(pcache, &ciphers);
	gnutls_priority_deinit(pcache);
	if (ret < 0) {
		tlshd_log_gnutls_error(ret);
		return -EIO;
	}

pstring = strdup("SECURE256:+SECURE128:-COMP-ALL");
	if (!pstring)
		return -ENOMEM;

/* All kernel TLS consumers require TLS v1.3 or newer. */
	pstring = tlshd_string_concat(pstring, ":-VERS-ALL:+VERS-TLS1.3:%NO_TICKETS");
	if (!pstring)
		return -ENOMEM;

/*
	 * Handshakes must negotiate only ciphers that are supported
	 * by kTLS. The list below contains the ciphers that are
	 * common to both kTLS and GnuTLS (Linux v6.2, GnuTLS 3.8.0).
	 *
	 * The resulting list is ordered by local system priority.
	 */
	pstring = tlshd_string_concat(pstring, ":-CIPHER-ALL");
	if (!pstring)
		return -ENOMEM;
	for (i = 0; i < ret; ++i) {
		pstring = tlshd_cipher_string_emit(pstring, ciphers[i]);
		if (!pstring)
			return -ENOMEM;
	}

tlshd_log_debug("x.509 priority string: %s\n", pstring);

ret = gnutls_priority_init(&tlshd_gnutls_priority_x509, pstring, &errpos);
	if (ret != GNUTLS_E_SUCCESS) {
		free(pstring);
		tlshd_log_gnutls_error(ret);
		return -EIO;
	}

pstring = tlshd_string_concat(pstring, ":+PSK:+DHE-PSK:+ECDHE-PSK");
	if (!pstring) {
		gnutls_priority_deinit(tlshd_gnutls_priority_x509);
		return -ENOMEM;
	}

tlshd_log_debug("PSK priority string: %s\n", pstring);

ret = gnutls_priority_init(&tlshd_gnutls_priority_psk, pstring, &errpos);
	if (ret != GNUTLS_E_SUCCESS) {
		free(pstring);
		gnutls_priority_deinit(tlshd_gnutls_priority_x509);
		tlshd_log_gnutls_error(ret);
		return -EIO;
	}

free(pstring);
	return 0;
}

/**
 * tlshd_gnutls_priority_set - Initialize priorities per-session
 * @session: session to initialize
 * @parms: handshake parameters
 *
 * Returns GNUTLS_E_SUCCESS on success, otherwise an error code.
 */
int tlshd_gnutls_priority_set(gnutls_session_t session, struct tlshd_handshake_parms *parms)
{
	return gnutls_priority_set(session, parms->auth_mode == HANDSHAKE_AUTH_PSK ?
					    tlshd_gnutls_priority_psk : tlshd_gnutls_priority_x509);
}

/**
 * tlshd_gnutls_priority_deinit - Free GnuTLS priority caches
 *
 */
void tlshd_gnutls_priority_deinit(void)
{
	gnutls_priority_deinit(tlshd_gnutls_priority_x509);
	gnutls_priority_deinit(tlshd_gnutls_priority_psk);
}
0707010000001D000081A4000000000000000000000001646518CA00001A55000000000000000000000000000000000000001F00000000ktls-utils-0.9/src/tlshd/log.c/*
 * Record audit and debugging information in the system log.
 *
 * Copyright (c) 2022 Oracle and/or its affiliates.
 *
 * ktls-utils is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; version 2.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301, USA.
 */

#include "config.h"

#include <stdbool.h>
#include <unistd.h>
#include <string.h>
#include <syslog.h>
#include <stdarg.h>
#include <errno.h>

#include <sys/socket.h>
#include <netdb.h>
#include <keyutils.h>

#include <gnutls/gnutls.h>
#include <gnutls/abstract.h>

#include <netlink/errno.h>

#include <glib.h>

#include "tlshd.h"

int tlshd_debug;
int tlshd_tls_debug;
int tlshd_stderr;

/**
 * tlshd_log_success - Emit "handshake successful" notification
 * @hostname: peer's DNS name
 * @sap: peer's IP address
 * @salen: length of IP address
 *
 */
void tlshd_log_success(const char *hostname, const struct sockaddr *sap,
		       socklen_t salen)
{
	char buf[NI_MAXHOST];

getnameinfo(sap, salen, buf, sizeof(buf), NULL, 0, NI_NUMERICHOST);
	syslog(LOG_INFO, "Handshake with %s (%s) was successful\n",
		hostname, buf);
}

/**
 * tlshd_log_failure - Emit "handshake failed" notification
 * @hostname: peer's DNS name
 * @sap: peer's IP address
 * @salen: length of IP address
 *
 */
void tlshd_log_failure(const char *hostname, const struct sockaddr *sap,
		       socklen_t salen)
{
	if (salen) {
		char buf[NI_MAXHOST];

getnameinfo(sap, salen, buf, sizeof(buf), NULL, 0, NI_NUMERICHOST);
		syslog(LOG_ERR, "Handshake with '%s' (%s) failed\n",
		       hostname, buf);
	} else
		syslog(LOG_ERR, "Handshake request failed\n");
}

/**
 * tlshd_log_debug - Emit a debugging notification
 * @fmt - printf-style format string
 *
 */
void tlshd_log_debug(const char *fmt, ...)
{
	va_list args;

if (!tlshd_debug)
		return;

va_start(args, fmt);
	vsyslog(LOG_DEBUG, fmt, args);
	va_end(args);
}

/**
 * tlshd_log_error - Emit a generic error notification
 * @fmt - printf-style format string
 *
 */
void tlshd_log_error(const char *fmt, ...)
{
	va_list args;

va_start(args, fmt);
	vsyslog(LOG_ERR, fmt, args);
	va_end(args);
}

/**
 * tlshd_log_notice - Emit a generic warning
 * @fmt - printf-style format string
 *
 */
void tlshd_log_notice(const char *fmt, ...)
{
	va_list args;

va_start(args, fmt);
	vsyslog(LOG_NOTICE, fmt, args);
	va_end(args);
}

/**
 * tlshd_log_perror - Emit "system call failed" notification
 * @sap: remote address to log
 *
 */
void tlshd_log_perror(const char *prefix)
{
	syslog(LOG_NOTICE, "%s: %s\n", prefix, strerror(errno));
}

/**
 * tlshd_log_gai_error - Emit "getaddr/nameinfo failed" notification
 * @error: error code returned by getaddrinfo(3) or getnameinfo(3)
 *
 */
void tlshd_log_gai_error(int error)
{
	syslog(LOG_NOTICE, "%s\n", gai_strerror(error));
}

struct tlshd_cert_status_bit {
	unsigned int	bit;
	char		*name;
};

static const struct tlshd_cert_status_bit tlshd_cert_status_names[] = {
	/* { GNUTLS_CERT_INVALID, "invalid" }, */
	{ GNUTLS_CERT_REVOKED, "revoked" },
	{ GNUTLS_CERT_SIGNER_NOT_FOUND, "signer not found" },
	{ GNUTLS_CERT_SIGNER_NOT_CA, "signer not CA" },
	{ GNUTLS_CERT_INSECURE_ALGORITHM, "uses insecure algorithm" },
	{ GNUTLS_CERT_NOT_ACTIVATED, "not activated" },
	{ GNUTLS_CERT_EXPIRED, "expired" },
	{ GNUTLS_CERT_SIGNATURE_FAILURE, "signature failure" },
	{ GNUTLS_CERT_REVOCATION_DATA_SUPERSEDED, "revocation data superseded" },
	{ GNUTLS_CERT_UNEXPECTED_OWNER, "owner unexpected" },
	{ GNUTLS_CERT_REVOCATION_DATA_ISSUED_IN_FUTURE, "revocation data issued in the future" },
	{ GNUTLS_CERT_SIGNER_CONSTRAINTS_FAILURE, "signer constraints failure" },
	{ GNUTLS_CERT_MISMATCH, "mismatch" },
	{ GNUTLS_CERT_PURPOSE_MISMATCH, "purpose mismatch" },
	{ GNUTLS_CERT_MISSING_OCSP_STATUS, "has missing OCSP status" },
	{ GNUTLS_CERT_INVALID_OCSP_STATUS, "has invalid OCSP status" },
	{ GNUTLS_CERT_UNKNOWN_CRIT_EXTENSIONS, "has unknown crit extensions" },
	{ 0, NULL }
};

/**
 * tlshd_log_cert_verification_error - Report a failed certificate verification
 * @session: Session with a failed handshake
 *
 */
void tlshd_log_cert_verification_error(gnutls_session_t session)
{
	unsigned int status;
	int i;

status = gnutls_session_get_verify_cert_status(session);

for (i = 0; tlshd_cert_status_names[i].name; i++)
		if (status & tlshd_cert_status_names[i].bit)
			syslog(LOG_ERR, "Certificate %s.\n",
			       tlshd_cert_status_names[i].name);
}

/**
 * tlshd_log_gnutls_error - Emit "library call failed" notification
 * @error: GnuTLS error code to log
 *
 */
void tlshd_log_gnutls_error(int error)
{
	syslog(LOG_NOTICE, "gnutls: %s (%d)\n", gnutls_strerror(error), error);
}

/**
 * tlshd_gnutls_log_func - Library callback function to log a message
 * @level: log level
 * @msg: message to log
 *
 */
void tlshd_gnutls_log_func(int level, const char *msg)
{
	syslog(LOG_DEBUG, "gnutls(%d): %s", level, msg);
}

/**
 * tlshd_gnutls_audit_func - Library callback function to log an audit message
 * @session: controlling GnuTLS session
 * @msg: message to log
 *
 */
void tlshd_gnutls_audit_func(__attribute__ ((unused)) gnutls_session_t session,
			     const char *msg)
{
	syslog(LOG_INFO, "audit: %s", msg);
}

/**
 * tlshd_log_gerror - Emit glib2 "library call failed" notification
 * @msg: message to log
 * @error: error information
 *
 */
void tlshd_log_gerror(const char *msg, GError *error)
{
	syslog(LOG_ERR, "%s: %s", msg, error->message);
}

/**
 * tlshd_log_nl_error - Log a netlink error
 * @msg: message to log
 * @err: error number
 *
 */
void tlshd_log_nl_error(const char *msg, int err)
{
	syslog(LOG_ERR, "%s: %s", msg, nl_geterror(err));
}

/**
 * tlshd_log_init - Initialize audit logging
 * @progname: NUL-terminated string containing program name
 *
 */
void tlshd_log_init(const char *progname)
{
	int option;

option = LOG_NDELAY | LOG_PID;
	if (tlshd_stderr)
		option |= LOG_PERROR;
	openlog(progname, option, LOG_AUTH);

syslog(LOG_NOTICE, "Built from " PACKAGE_STRING " on " __DATE__ " " __TIME__);
}

/**
 * tlshd_log_shutdown - Log a tlshd shutdown notice
 *
 */
void tlshd_log_shutdown(void)
{
	syslog(LOG_NOTICE, "Shutting down.");
}

/**
 * tlshd_log_close - Release audit logging resources
 *
 */
void tlshd_log_close(void)
{
	closelog();
}
0707010000001E000081A4000000000000000000000001646518CA00000ABE000000000000000000000000000000000000002000000000ktls-utils-0.9/src/tlshd/main.c/*
 * Handle a request for a TLS handshake on behalf of an
 * in-kernel TLS consumer.
 *
 * Copyright (c) 2022 Oracle and/or its affiliates.
 *
 * ktls-utils is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; version 2.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301, USA.
 */

#include "config.h"

#include <sys/types.h>
#include <sys/socket.h>

#include <stdbool.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <poll.h>
#include <string.h>
#include <getopt.h>
#include <signal.h>
#include <libgen.h>
#include <keyutils.h>

#include <netlink/netlink.h>
#include <netlink/socket.h>
#include <netlink/msg.h>

#include <gnutls/gnutls.h>
#include <gnutls/abstract.h>

#include <glib.h>

#include "tlshd.h"

static const char *optstring = "c:h:sv";
static const struct option longopts[] = {
	{ "config",	required_argument,	NULL,	'c' },
	{ "help",	no_argument,		NULL,	'h' },
	{ "stderr",	no_argument,		NULL,	's' },
	{ "version",	no_argument,		NULL,	'v' },
	{ NULL,		0,			NULL,	 0 }
};

int main(int argc, char **argv)
{
	static gchar config_file[PATH_MAX + 1] = "/etc/tlshd.conf";
	char *progname;
	int c;
	size_t len;

tlshd_tls_debug = 0;
	progname = basename(argv[0]);
	while ((c = getopt_long(argc, argv, optstring, longopts, NULL)) != -1) {
		switch (c) {
		case 'c':
			len = sizeof(config_file) - 1;
			if (strlen(optarg) >= len) {
				fprintf(stderr, "Invalid config file\n");
				return EXIT_FAILURE;
			}
			strncpy(config_file, optarg, len);
			config_file[len] = '\0';
			break;
		case 's':
			tlshd_stderr = 1;
			break;
		case 'v':
			fprintf(stderr, "%s, built from " PACKAGE_STRING
				" on " __DATE__ " " __TIME__ "\n",
				progname);
			return EXIT_SUCCESS;
		case 'h':
		default:
			fprintf(stderr, "usage: %s [-chsv]\n", progname);
		}
	}

tlshd_log_init(progname);

if (!tlshd_config_init(config_file)) {
		tlshd_log_shutdown();
		tlshd_log_close();
		return EXIT_FAILURE;
	}

if (tlshd_gnutls_priority_init()) {
		tlshd_config_shutdown();
		tlshd_log_shutdown();
		tlshd_log_close();
		return EXIT_FAILURE;
	}

tlshd_genl_dispatch();

tlshd_gnutls_priority_deinit();
	tlshd_config_shutdown();
	tlshd_log_shutdown();
	tlshd_log_close();
	return EXIT_SUCCESS;
}
0707010000001F000081A4000000000000000000000001646518CA00002C07000000000000000000000000000000000000002300000000ktls-utils-0.9/src/tlshd/netlink.c/*
 * Netlink operations for tlshd
 *
 * Copyright (c) 2023 Oracle and/or its affiliates.
 *
 * ktls-utils is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; version 2.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301, USA.
 */

#include "config.h"

#include <sys/types.h>
#include <sys/stat.h>
#include <sys/socket.h>

#include <stdbool.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <errno.h>
#include <poll.h>
#include <fcntl.h>
#include <keyutils.h>

#include <gnutls/gnutls.h>
#include <gnutls/abstract.h>
#include <gnutls/x509.h>
#include <linux/tls.h>

#include <netlink/netlink.h>
#include <netlink/msg.h>
#include <netlink/genl/genl.h>
#include <netlink/genl/ctrl.h>

#include <glib.h>

#include "tlshd.h"
#include "netlink.h"

static int tlshd_genl_sock_open(struct nl_sock **sock)
{
	struct nl_sock *nls;
	int err, ret;

ret = ENOMEM;
	nls = nl_socket_alloc();
	if (!nls) {
		tlshd_log_error("Failed to allocate netlink socket.");
		goto out;
	}

ret = ENOLINK;
	err = genl_connect(nls);
	if (err != NLE_SUCCESS) {
		tlshd_log_nl_error("genl_connect", err);
		nl_socket_free(nls);
		goto out;
	}

*sock = nls;
	ret = 0;
out:
	return ret;
}

static void tlshd_genl_sock_close(struct nl_sock *nls)
{
	if (!nls)
		return;

nl_close(nls);
	nl_socket_free(nls);
}

static const struct nla_policy
tlshd_accept_nl_policy[HANDSHAKE_A_ACCEPT_MAX + 1] = {
	[HANDSHAKE_A_ACCEPT_SOCKFD]		= { .type = NLA_U32, },
	[HANDSHAKE_A_ACCEPT_HANDLER_CLASS]	= { .type = NLA_U32, },
	[HANDSHAKE_A_ACCEPT_MESSAGE_TYPE]	= { .type = NLA_U32, },
	[HANDSHAKE_A_ACCEPT_TIMEOUT]		= { .type = NLA_U32, },
	[HANDSHAKE_A_ACCEPT_AUTH_MODE]		= { .type = NLA_U32, },
	[HANDSHAKE_A_ACCEPT_PEER_IDENTITY]	= { .type = NLA_U32, },
	[HANDSHAKE_A_ACCEPT_CERTIFICATE]	= { .type = NLA_NESTED, },
	[HANDSHAKE_A_ACCEPT_PEERNAME]		= { .type = NLA_STRING, },
};

static int tlshd_genl_event_handler(struct nl_msg *msg,
				    __attribute__ ((unused)) void *arg)
{
	struct nlattr *tb[HANDSHAKE_A_ACCEPT_MAX + 1];
	int err;

err = genlmsg_parse(nlmsg_hdr(msg), 0, tb, HANDSHAKE_A_ACCEPT_MAX,
			    tlshd_accept_nl_policy);
	if (err < 0) {
		tlshd_log_nl_error("genlmsg_parse", err);
		return NL_SKIP;
	}

if (!tb[HANDSHAKE_A_ACCEPT_HANDLER_CLASS])
		return NL_SKIP;
	if (nla_get_u32(tb[HANDSHAKE_A_ACCEPT_HANDLER_CLASS]) !=
	    HANDSHAKE_HANDLER_CLASS_TLSHD)
		return NL_SKIP;

if (!fork()) {
		/* child */
		tlshd_service_socket();
		exit(EXIT_SUCCESS);
	}

return NL_SKIP;
}

/**
 * tlshd_genl_dispatch - handle notification events
 *
 */
void tlshd_genl_dispatch(void)
{
	struct nl_sock *nls;
	int err, mcgrp;

err = tlshd_genl_sock_open(&nls);
	if (err)
		return;

nl_socket_modify_cb(nls, NL_CB_VALID, NL_CB_CUSTOM,
			    tlshd_genl_event_handler, NULL);

/* Let the kernel know we are running */
	mcgrp = genl_ctrl_resolve_grp(nls, HANDSHAKE_FAMILY_NAME,
				      HANDSHAKE_MCGRP_TLSHD);
	if (mcgrp < 0) {
		tlshd_log_error("Kernel handshake service is not available");
		goto out_close;
	}
	err = nl_socket_add_membership(nls, mcgrp);
	if (err != NLE_SUCCESS) {
		tlshd_log_nl_error("nl_socket_add_membership", err);
		goto out_close;
	}

if (signal(SIGCHLD, SIG_IGN) == SIG_ERR) {
		tlshd_log_perror("signal");
		goto out_close;
	}

nl_socket_disable_seq_check(nls);
	while (true) {
		err = nl_recvmsgs_default(nls);
		if (err < 0) {
			tlshd_log_nl_error("nl_recvmsgs", err);
			break;
		}
	};

out_close:
	tlshd_genl_sock_close(nls);
}

static void tlshd_parse_peer_identity(struct tlshd_handshake_parms *parms,
				      struct nlattr *head)
{
	if (!head) {
		tlshd_log_debug("No peer identities found\n");
		return;
	}

parms->num_peerids = 1;

parms->peerids = calloc(parms->num_peerids, sizeof(key_serial_t));
	if (!parms->peerids) {
		parms->num_peerids = 0;
		return;
	}

parms->peerids[0] = nla_get_u32(head);
}

static const struct nla_policy
tlshd_x509_nl_policy[HANDSHAKE_A_X509_MAX + 1] = {
	[HANDSHAKE_A_X509_CERT]		= { .type = NLA_U32, },
	[HANDSHAKE_A_X509_PRIVKEY]	= { .type = NLA_U32, },
};

static void tlshd_parse_certificate(struct tlshd_handshake_parms *parms,
				     struct nlattr *head)
{
	struct nlattr *tb[HANDSHAKE_A_X509_MAX + 1];
	int err;

if (!head) {
		tlshd_log_debug("No certificates found\n");
		return;
	}

err = nla_parse_nested(tb, HANDSHAKE_A_X509_MAX, head,
			       tlshd_x509_nl_policy);
	if (err < 0)
		return;

if (tb[HANDSHAKE_A_X509_CERT])
		parms->x509_cert = nla_get_u32(tb[HANDSHAKE_A_X509_CERT]);
	if (tb[HANDSHAKE_A_X509_PRIVKEY])
		parms->x509_privkey = nla_get_u32(tb[HANDSHAKE_A_X509_PRIVKEY]);
}

static char tlshd_peername[NI_MAXHOST] = "unknown";
static struct sockaddr_storage tlshd_peeraddr;

static int tlshd_genl_valid_handler(struct nl_msg *msg, void *arg)
{
	struct nlattr *tb[HANDSHAKE_A_ACCEPT_MAX + 1];
	struct tlshd_handshake_parms *parms = arg;
	char *peername = NULL;
	int err;

tlshd_log_debug("Parsing a valid netlink message\n");

err = genlmsg_parse(nlmsg_hdr(msg), 0, tb, HANDSHAKE_A_ACCEPT_MAX,
			    tlshd_accept_nl_policy);
	if (err < 0) {
		tlshd_log_nl_error("genlmsg_parse", err);
		return NL_STOP;
	}

if (tb[HANDSHAKE_A_ACCEPT_SOCKFD]) {
		parms->sockfd = nla_get_u32(tb[HANDSHAKE_A_ACCEPT_SOCKFD]);
		if (getpeername(parms->sockfd, parms->peeraddr,
				&parms->peeraddr_len) == -1) {
			tlshd_log_perror("getpeername");
			return NL_STOP;
		}
	}
	if (tb[HANDSHAKE_A_ACCEPT_MESSAGE_TYPE])
		parms->handshake_type = nla_get_u32(tb[HANDSHAKE_A_ACCEPT_MESSAGE_TYPE]);
	if (tb[HANDSHAKE_A_ACCEPT_PEERNAME])
		peername = nla_get_string(tb[HANDSHAKE_A_ACCEPT_PEERNAME]);
	if (tb[HANDSHAKE_A_ACCEPT_TIMEOUT])
		parms->timeout_ms = nla_get_u32(tb[HANDSHAKE_A_ACCEPT_TIMEOUT]);
	if (tb[HANDSHAKE_A_ACCEPT_AUTH_MODE])
		parms->auth_mode = nla_get_u32(tb[HANDSHAKE_A_ACCEPT_AUTH_MODE]);

tlshd_parse_peer_identity(parms, tb[HANDSHAKE_A_ACCEPT_PEER_IDENTITY]);
	tlshd_parse_certificate(parms, tb[HANDSHAKE_A_ACCEPT_CERTIFICATE]);

/* SNI needs a domain name. If the kernel provided an IP
	 * address, just use the reverse lookup results below. */
	if (peername) {
		static const struct addrinfo hints = {
			.ai_family	= AF_UNSPEC,
			.ai_flags	= AI_NUMERICHOST,
		};
		struct addrinfo *res;

err = getaddrinfo(peername, NULL, &hints, &res);
		if (!err) {
			freeaddrinfo(res);
			peername = NULL;
		}
	}
	if (peername)
		strcpy(tlshd_peername, peername);
	else {
		err = getnameinfo(parms->peeraddr, parms->peeraddr_len,
				  tlshd_peername, sizeof(tlshd_peername),
				  NULL, 0, NI_NAMEREQD);
		if (err) {
			tlshd_log_gai_error(err);
			return NL_STOP;
		}
	}

return NL_SKIP;
}

static const struct tlshd_handshake_parms tlshd_default_handshake_parms = {
	.peername		= tlshd_peername,
	.peeraddr		= (struct sockaddr *)&tlshd_peeraddr,
	.peeraddr_len		= sizeof(tlshd_peeraddr),
	.sockfd			= -1,
	.handshake_type		= HANDSHAKE_MSG_TYPE_UNSPEC,
	.timeout_ms		= GNUTLS_DEFAULT_HANDSHAKE_TIMEOUT,
	.auth_mode		= HANDSHAKE_AUTH_UNSPEC,
	.x509_cert		= TLS_NO_CERT,
	.x509_privkey		= TLS_NO_PRIVKEY,
	.peerids		= NULL,
	.num_peerids		= 0,
	.msg_status		= 0,
	.session_status		= EIO,

.num_remote_peerids	= 0,
};

/**
 * tlshd_genl_get_handshake_parms - Retrieve handshake parameters
 * @parms: buffer to fill in with parameters
 *
 * Returns 0 if handshake parameters were retrieved successfully.
 *
 * Otherwise a positive errno is returned, and the content of
 * @parms is indeterminant.
 */
int tlshd_genl_get_handshake_parms(struct tlshd_handshake_parms *parms)
{
	int family_id, err, ret;
	struct nlmsghdr *hdr;
	struct nl_sock *nls;
	struct nl_msg *msg;

tlshd_log_debug("Querying the handshake service\n");

*parms = tlshd_default_handshake_parms;

ret = tlshd_genl_sock_open(&nls);
	if (ret)
		return ret;

ret = ESRCH;
	family_id = genl_ctrl_resolve(nls, HANDSHAKE_FAMILY_NAME);
	if (family_id < 0) {
		tlshd_log_error("Failed to resolve netlink service.");
		goto out_close;
	}

nl_socket_modify_cb(nls, NL_CB_VALID, NL_CB_CUSTOM,
			    tlshd_genl_valid_handler, parms);

msg = nlmsg_alloc();
	if (!msg) {
		tlshd_log_error("Failed to allocate message buffer.");
		goto out_close;
	}

ret = EIO;
	hdr = genlmsg_put(msg, NL_AUTO_PORT, NL_AUTO_SEQ, family_id,
			  0, 0, HANDSHAKE_CMD_ACCEPT, 0);
	if (!hdr) {
		tlshd_log_error("Failed to set up message header.");
		goto out_msgfree;
	}

err = nla_put_u32(msg, HANDSHAKE_A_ACCEPT_HANDLER_CLASS,
			  HANDSHAKE_HANDLER_CLASS_TLSHD);
	if (err < 0) {
		tlshd_log_nl_error("nla_put handler class", err);
		goto out_msgfree;
	}

nl_socket_disable_auto_ack(nls);
	err = nl_send_auto(nls, msg);
	if (err < 0) {
		tlshd_log_nl_error("nl_send_auto", err);
		goto out_msgfree;
	}

ret = EINVAL;
	err = nl_recvmsgs_default(nls);
	if (err < 0) {
		tlshd_log_nl_error("nl_recvmsgs", err);
		goto out_msgfree;
	}

ret = parms->msg_status;

out_msgfree:
	nlmsg_free(msg);
out_close:
	tlshd_genl_sock_close(nls);
	return ret;
}

static int tlshd_genl_put_remote_peerids(struct nl_msg *msg,
					 struct tlshd_handshake_parms *parms)
{
	unsigned int i;
	int err;

for (i = 0; i < parms->num_remote_peerids; i++) {
		err = nla_put_u32(msg, HANDSHAKE_A_DONE_REMOTE_AUTH,
				  parms->remote_peerid[i]);
		if (err < 0) {
			tlshd_log_nl_error("nla_put peer id", err);
			return -1;
		}
	}
	return 0;
}

/**
 * tlshd_genl_done - Indicate anon handshake has completed successfully
 * @parms: buffer filled in with parameters
 *
 */
void tlshd_genl_done(struct tlshd_handshake_parms *parms)
{
	struct nlmsghdr *hdr;
	struct nl_sock *nls;
	struct nl_msg *msg;
	int family_id, err;

if (parms->sockfd == -1)
		return;

err = tlshd_genl_sock_open(&nls);
	if (err)
		return;

family_id = genl_ctrl_resolve(nls, HANDSHAKE_FAMILY_NAME);
	if (family_id < 0) {
		tlshd_log_nl_error("genl_ctrl_resolve", err);
		goto out_close;
	}

msg = nlmsg_alloc();
	if (!msg) {
		tlshd_log_error("Failed to allocate message buffer.");
		goto out_close;
	}

hdr = genlmsg_put(msg, NL_AUTO_PORT, NL_AUTO_SEQ, family_id,
			  0, 0, HANDSHAKE_CMD_DONE, 0);
	if (!hdr) {
		tlshd_log_error("Failed to set up message header.");
		goto out_free;
	}

err = nla_put_u32(msg, HANDSHAKE_A_DONE_STATUS,
			  parms->session_status);
	if (err) {
		tlshd_log_nl_error("nla_put sess_status", err);
		goto out_free;
	}

err = nla_put_u32(msg, HANDSHAKE_A_DONE_SOCKFD, parms->sockfd);
	if (err < 0) {
		tlshd_log_nl_error("nla_put sockfd", err);
		goto out_free;
	}
	if (parms->session_status)
		goto sendit;

err = tlshd_genl_put_remote_peerids(msg, parms);
	if (err < 0)
		goto out_free;

sendit:
	nl_socket_disable_auto_ack(nls);
	err = nl_send_auto(nls, msg);
	if (err < 0) {
		tlshd_log_nl_error("nl_send_auto", err);
		goto out_free;
	}

out_free:
	nlmsg_free(msg);
out_close:
	tlshd_genl_sock_close(nls);
}
07070100000020000081A4000000000000000000000001646518CA0000067D000000000000000000000000000000000000002300000000ktls-utils-0.9/src/tlshd/netlink.h/* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) */
/* Do not edit directly, auto-generated from: */
/*	Documentation/netlink/specs/handshake.yaml */
/* YNL-GEN uapi header */

#ifndef _UAPI_LINUX_HANDSHAKE_H
#define _UAPI_LINUX_HANDSHAKE_H

#define HANDSHAKE_FAMILY_NAME		"handshake"
#define HANDSHAKE_FAMILY_VERSION	1

enum handshake_handler_class {
	HANDSHAKE_HANDLER_CLASS_NONE,
	HANDSHAKE_HANDLER_CLASS_TLSHD,
	HANDSHAKE_HANDLER_CLASS_MAX,
};

enum handshake_msg_type {
	HANDSHAKE_MSG_TYPE_UNSPEC,
	HANDSHAKE_MSG_TYPE_CLIENTHELLO,
	HANDSHAKE_MSG_TYPE_SERVERHELLO,
};

enum handshake_auth {
	HANDSHAKE_AUTH_UNSPEC,
	HANDSHAKE_AUTH_UNAUTH,
	HANDSHAKE_AUTH_PSK,
	HANDSHAKE_AUTH_X509,
};

enum {
	HANDSHAKE_A_X509_CERT = 1,
	HANDSHAKE_A_X509_PRIVKEY,

__HANDSHAKE_A_X509_MAX,
	HANDSHAKE_A_X509_MAX = (__HANDSHAKE_A_X509_MAX - 1)
};

enum {
	HANDSHAKE_A_ACCEPT_SOCKFD = 1,
	HANDSHAKE_A_ACCEPT_HANDLER_CLASS,
	HANDSHAKE_A_ACCEPT_MESSAGE_TYPE,
	HANDSHAKE_A_ACCEPT_TIMEOUT,
	HANDSHAKE_A_ACCEPT_AUTH_MODE,
	HANDSHAKE_A_ACCEPT_PEER_IDENTITY,
	HANDSHAKE_A_ACCEPT_CERTIFICATE,
	HANDSHAKE_A_ACCEPT_PEERNAME,

__HANDSHAKE_A_ACCEPT_MAX,
	HANDSHAKE_A_ACCEPT_MAX = (__HANDSHAKE_A_ACCEPT_MAX - 1)
};

enum {
	HANDSHAKE_A_DONE_STATUS = 1,
	HANDSHAKE_A_DONE_SOCKFD,
	HANDSHAKE_A_DONE_REMOTE_AUTH,

__HANDSHAKE_A_DONE_MAX,
	HANDSHAKE_A_DONE_MAX = (__HANDSHAKE_A_DONE_MAX - 1)
};

enum {
	HANDSHAKE_CMD_READY = 1,
	HANDSHAKE_CMD_ACCEPT,
	HANDSHAKE_CMD_DONE,

__HANDSHAKE_CMD_MAX,
	HANDSHAKE_CMD_MAX = (__HANDSHAKE_CMD_MAX - 1)
};

#define HANDSHAKE_MCGRP_NONE	"none"
#define HANDSHAKE_MCGRP_TLSHD	"tlshd"

#endif /* _UAPI_LINUX_HANDSHAKE_H */
07070100000021000081A4000000000000000000000001646518CA0000265F000000000000000000000000000000000000002200000000ktls-utils-0.9/src/tlshd/server.c/*
 * Perform a TLSv1.3 server-side handshake.
 *
 * Copyright (c) 2023 Oracle and/or its affiliates.
 *
 * ktls-utils is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; version 2.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301, USA.
 */

#include "config.h"

#include <sys/types.h>
#include <sys/socket.h>

#include <stdbool.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <errno.h>
#include <keyutils.h>

#include <gnutls/gnutls.h>
#include <gnutls/abstract.h>
#include <gnutls/x509.h>
#include <linux/tls.h>

#include <glib.h>

#include "tlshd.h"
#include "netlink.h"

static gnutls_privkey_t tlshd_server_privkey;
static gnutls_pcert_st tlshd_server_cert;

/*
 * XXX: After this point, tlshd_server_cert should be deinited on error.
 */
static bool tlshd_x509_server_get_cert(struct tlshd_handshake_parms *parms)
{
	if (parms->x509_cert != TLS_NO_CERT)
		return tlshd_keyring_get_cert(parms->x509_cert, &tlshd_server_cert);
	return tlshd_config_get_server_cert(&tlshd_server_cert);
}

/*
 * XXX: After this point, tlshd_server_privkey should be deinited on error.
 */
static bool tlshd_x509_server_get_privkey(struct tlshd_handshake_parms *parms)
{
	if (parms->x509_privkey != TLS_NO_PRIVKEY)
		return tlshd_keyring_get_privkey(parms->x509_privkey,
						 tlshd_server_privkey);
	return tlshd_config_get_server_privkey(&tlshd_server_privkey);
}

static void tlshd_x509_log_issuers(const gnutls_datum_t *req_ca_rdn, int nreqs)
{
	char issuer_dn[256];
	size_t len;
	int i, ret;

if (nreqs < 1)
		return;

tlshd_log_debug("Server's trusted authorities:");

for (i = 0; i < nreqs; i++) {
		len = sizeof(issuer_dn);
		ret = gnutls_x509_rdn_get(&req_ca_rdn[i], issuer_dn, &len);
		if (ret >= 0)
			tlshd_log_debug("   [%d]: %s", i, issuer_dn);
	}
}

tlshd_x509_log_issuers(req_ca_rdn, nreqs);

type = gnutls_certificate_type_get(session);
	if (type != GNUTLS_CRT_X509)
		return -1;

*pcert_length = 1;
	*pcert = &tlshd_server_cert;
	*privkey = tlshd_server_privkey;
	return 0;
}

/**
 * tlshd_server_x509_verify_function - Verify remote's x.509 certificate
 * @session: session in the midst of a handshake
 *
 * A return value of %GNUTLS_E_SUCCESS indicates that the TLS session
 * has been allowed to continue. tlshd either sets the peerid array if
 * the presented certificate has been successfully verified, or the
 * peerid array is left empty if no peer information was available to
 * perform verification. The kernel consumer can apply a security policy
 * based on this information.
 *
 * A return value of %GNUTLS_E_CERTIFICATE_ERROR means that certificate
 * verification failed. The server sends an ALERT to the client.
 */
static int tlshd_server_x509_verify_function(gnutls_session_t session)
{
	struct tlshd_handshake_parms *parms;
	const gnutls_datum_t *peercerts;
	gnutls_certificate_type_t type;
	unsigned int i, status;
	gnutls_datum_t out;
	int ret;

parms = gnutls_session_get_ptr(session);

ret = gnutls_certificate_verify_peers3(session, NULL, &status);
	switch (ret) {
	case GNUTLS_E_SUCCESS:
		break;
	case GNUTLS_E_NO_CERTIFICATE_FOUND:
		tlshd_log_debug("The peer offered no certificate.");
		return GNUTLS_E_SUCCESS;
	default:
		tlshd_log_gnutls_error(ret);
		goto certificate_error;
	}
	type = gnutls_certificate_type_get(session);
	gnutls_certificate_verification_status_print(status, type, &out, 0);
	tlshd_log_debug("%s", out.data);
	gnutls_free(out.data);
	if (status)
		goto certificate_error;

/* To do: Examine extended key usage information here, if we want
	 * to get picky. Kernel would have to tell us what to look for
	 * via a netlink attribute. */

tlshd_log_debug("The peer offered %u certificate(s).",
			parms->num_remote_peerids);

return GNUTLS_E_SUCCESS;

certificate_error:
	gnutls_alert_send(session, GNUTLS_AL_FATAL, GNUTLS_A_ACCESS_DENIED);
	return GNUTLS_E_CERTIFICATE_ERROR;
}

static void tlshd_server_x509_handshake(struct tlshd_handshake_parms *parms)
{
	gnutls_certificate_credentials_t xcred;
	gnutls_session_t session;
	int ret;

ret = gnutls_certificate_allocate_credentials(&xcred);
	if (ret != GNUTLS_E_SUCCESS) {
		tlshd_log_gnutls_error(ret);
		return;
	}

ret = gnutls_certificate_set_x509_system_trust(xcred);
	if (ret < 0) {
		tlshd_log_gnutls_error(ret);
		goto out_free_creds;
	}
	tlshd_log_debug("System trust: Loaded %d certificate(s).", ret);

if (!tlshd_x509_server_get_cert(parms)) {
		goto out_free_creds;
	}
	if (!tlshd_x509_server_get_privkey(parms)) {
		goto out_free_creds;
	}
	gnutls_certificate_set_retrieve_function2(xcred,
						  tlshd_x509_retrieve_key_cb);

ret = gnutls_init(&session, GNUTLS_SERVER);
	if (ret != GNUTLS_E_SUCCESS) {
		tlshd_log_gnutls_error(ret);
		goto out_free_creds;
	}
	gnutls_transport_set_int(session, parms->sockfd);
	gnutls_session_set_ptr(session, parms);

gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE, xcred);
	gnutls_certificate_set_verify_function(xcred,
					       tlshd_server_x509_verify_function);
	gnutls_certificate_server_set_request(session, GNUTLS_CERT_REQUEST);

tlshd_start_tls_handshake(session, parms);

gnutls_deinit(session);

out_free_creds:
	gnutls_certificate_free_credentials(xcred);
}

/**
 * tlshd_server_psk_cb - Validate remote's username
 * @session: session in the midst of a handshake
 * @username: remote's username
 * @key: PSK matching @username
 *
 * Searches for a key with description @username in the session
 * keyring, and stores the PSK data in @key if found.
 *
 * Return values:
 *   %0: Matching key has been stored in @key
 *   %-1: Error during lookup, @key is not updated
 */
static int tlshd_server_psk_cb(gnutls_session_t session,
			       const char *username, gnutls_datum_t *key)
{
	struct tlshd_handshake_parms *parms;
	key_serial_t psk;
	long ret;

parms = gnutls_session_get_ptr(session);

ret = keyctl_search(KEY_SPEC_SESSION_KEYRING, "psk", username, 0);
	if (ret < 0) {
		tlshd_log_error("failed to search key");
		return -1;
	}

psk = (key_serial_t)ret;
	if (!tlshd_keyring_get_psk_key(psk, key)) {
		tlshd_log_error("failed to load key");
		return -1;
	}

/* PSK uses the same identity for both client and server */
	parms->remote_peerid[0] = psk;
	parms->num_remote_peerids = 1;
	return 0;
}

static void tlshd_server_psk_handshake(struct tlshd_handshake_parms *parms)
{
	gnutls_psk_server_credentials_t psk_cred;
	gnutls_session_t session;
	int ret;

ret = gnutls_psk_allocate_server_credentials(&psk_cred);
	if (ret != GNUTLS_E_SUCCESS) {
		tlshd_log_gnutls_error(ret);
		return;
	}

gnutls_psk_set_server_credentials_function(psk_cred,
						   tlshd_server_psk_cb);

gnutls_credentials_set(session, GNUTLS_CRD_PSK, psk_cred);

tlshd_start_tls_handshake(session, parms);

gnutls_deinit(session);

out_free_creds:
	gnutls_psk_free_server_credentials(psk_cred);
}

/**
 * tlshd_serverhello_handshake - send a TLSv1.3 ServerHello
 * @parms: handshake parameters
 *
 */
void tlshd_serverhello_handshake(struct tlshd_handshake_parms *parms)
{
	int ret;

ret = gnutls_global_init();
	if (ret != GNUTLS_E_SUCCESS) {
		tlshd_log_gnutls_error(ret);
		return;
	}

if (tlshd_tls_debug)
		gnutls_global_set_log_level(tlshd_tls_debug);
	gnutls_global_set_log_function(tlshd_gnutls_log_func);
	gnutls_global_set_audit_log_function(tlshd_gnutls_audit_func);

tlshd_log_debug("System config file: %s", gnutls_get_system_config_file());

switch (parms->auth_mode) {
	case HANDSHAKE_AUTH_X509:
		tlshd_server_x509_handshake(parms);
		break;
	case HANDSHAKE_AUTH_PSK:
		tlshd_server_psk_handshake(parms);
		break;
	default:
		tlshd_log_debug("Unrecognized auth mode (%d)",
				parms->auth_mode);
	}

gnutls_global_deinit();
}
07070100000022000081A4000000000000000000000001646518CA000003F8000000000000000000000000000000000000002400000000ktls-utils-0.9/src/tlshd/tlshd.conf#
# Copyright (c) 2022 Oracle and/or its affiliates.
#
# This file is part of ktls-utils.
#
# ktls-utils is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License as
# published by the Free Software Foundation; version 2.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
# 02110-1301, USA.
#
# See tlshd.conf(5) for details.
#

[main]
debug=0
tlsdebug=0
nl_debug=0

#keyrings= <keyring>;<keyring>;<keyring>

[authenticate.client]
#x509.certificate= <pathname>
#x509.private_key= <pathname>

[authenticate.server]
#x509.certificate= <pathname>
#x509.private_key= <pathname>
07070100000023000081A4000000000000000000000001646518CA00000CB7000000000000000000000000000000000000002800000000ktls-utils-0.9/src/tlshd/tlshd.conf.man.\"
.\" Copyright (c) 2022 Oracle and/or its affiliates.
.\"
.\" ktls-utils is free software; you can redistribute it and/or
.\" modify it under the terms of the GNU General Public License as
.\" published by the Free Software Foundation; version 2.
.\"
.\" This program is distributed in the hope that it will be useful,
.\" but WITHOUT ANY WARRANTY; without even the implied warranty of
.\" MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
.\" General Public License for more details.
.\"
.\" You should have received a copy of the GNU General Public License
.\" along with this program; if not, write to the Free Software
.\" Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
.\" 02110-1301, USA.
.\"
.\" tlshd(8)
.\"
.\" Copyright (c) 2022 Oracle and/or its affiliates.
.TH tlshd 8 "20 Oct 2022"
.SH NAME
tlshd.conf \- tlshd configuration file
.SH SYNOPSIS
.B /etc/tlshd.conf
.SH DESCRIPTION
The
.B tlshd
program implements a user agent that services TLS handshake requests
on behalf of kernel TLS consumers.
Its configuration file contains information that the program reads
when it starts up.
The file is designed to be human readable and contains a list of keywords
with values that provide various types of information.
The configuration file is considered a trusted source of information.
.P
The
.B tlshd
program reads this file once when it is launched.
Thus changes made in this file take effect only when the
.B tlshd
program is restarted.
If this file does not exist, the
.B tlshd
program exits immediately.
.SH OPTIONS
The configuration file is split into sections.
.P
The
.I [main]
section specifies run-time settings for the
.B tlshd
program.
In this section, there are two available options:
.TP
.B debug
This option specifies an integer which indicates the debug message level.
Zero, the quietest setting, is the default.
.TP
.B tlsdebug
This option specifies an integer which indicates the debug message level
for TLS library calls.
Zero, the quietest setting, is the default.
.TP
.B nl_debug
This option specifies an integer which indicates the debug message level
for netlink operations.
Zero, the quietest setting, is the default.
.TP
.B keyrings
This option specifies a semicolon-separated list of auxiliary keyrings
that might contain handshake authentication tokens.
.B tlshd
links these keyrings into its session keyring.
The configuration file may specify either a keyring's name or serial number.
The default is to provide no keyring.
.P
The
.I [authentication]
section specifies default authentication material when establishing
TLS sessions.
There are two subsections:
.IR [client] and [server] .
In each of these subsections, there are two available options:
.TP
.B x509.certificate
This option specifies the pathname of a file containing
a PEM-encoded x.509 certificate that is to be presented during
a ClientHello request when no other certificate is available.
.TP
.B x509.private_key
This option specifies the pathname of a file containing
a PEM-encoded private key associated with the above certificate.
.SH NOTES
This software is a prototype.
It's purpose is for demonstration and as a proof-of-concept.
USE THIS SOFTWARE AT YOUR OWN RISK.
.SH SEE ALSO
.BR tlshd (8)
.SH AUTHOR
Chuck Lever
07070100000024000081A4000000000000000000000001646518CA00001017000000000000000000000000000000000000002100000000ktls-utils-0.9/src/tlshd/tlshd.h/*
 * Generic definitions and forward declarations for tlshd.
 *
 * ktls-utils is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; version 2.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301, USA.
 */

#include <linux/netlink.h>

#define ARRAY_SIZE(a)		(sizeof(a) / sizeof((a)[0]))

extern int tlshd_debug;
extern int tlshd_tls_debug;
extern int tlshd_stderr;

struct nl_sock;

struct tlshd_handshake_parms {
	char		*peername;
	struct sockaddr *peeraddr;
	socklen_t	peeraddr_len;
	int		sockfd;
	int		handshake_type;
	unsigned int	timeout_ms;
	int		auth_mode;
	key_serial_t	x509_cert;
	key_serial_t	x509_privkey;
	key_serial_t	*peerids;
	unsigned int	num_peerids;
	int		msg_status;

unsigned int	session_status;

unsigned int	num_remote_peerids;
	key_serial_t	remote_peerid[10];
};

/* client.c */
extern void tlshd_clienthello_handshake(struct tlshd_handshake_parms *parms);

/* config.c */
bool tlshd_config_init(const gchar *pathname);
void tlshd_config_shutdown(void);
bool tlshd_config_get_client_cert(gnutls_pcert_st *cert);
bool tlshd_config_get_client_privkey(gnutls_privkey_t *privkey);
bool tlshd_config_get_server_cert(gnutls_pcert_st *cert);
bool tlshd_config_get_server_privkey(gnutls_privkey_t *privkey);

/* handshake.c */
extern void tlshd_start_tls_handshake(gnutls_session_t session,
				      struct tlshd_handshake_parms *parms);
extern void tlshd_service_socket(void);

/* keyring.c */
extern bool tlshd_keyring_get_psk_username(key_serial_t serial,
					   char **username);
extern bool tlshd_keyring_get_psk_key(key_serial_t serial,
				      gnutls_datum_t *key);
extern bool tlshd_keyring_get_privkey(key_serial_t serial,
				      gnutls_privkey_t privkey);
extern bool tlshd_keyring_get_cert(key_serial_t serial, gnutls_pcert_st *cert);
extern key_serial_t tlshd_keyring_create_cert(gnutls_x509_crt_t cert,
					      const char *peername);
extern int tlshd_keyring_link_session(const char *keyring);

/* ktls.c */
extern unsigned int tlshd_initialize_ktls(gnutls_session_t session);
extern int tlshd_gnutls_priority_init(void);
extern int tlshd_gnutls_priority_set(gnutls_session_t session,
					struct tlshd_handshake_parms *parms);
extern void tlshd_gnutls_priority_deinit(void);

/* log.c */
extern void tlshd_log_init(const char *progname);
extern void tlshd_log_shutdown(void);
extern void tlshd_log_close(void);

extern void tlshd_log_success(const char *hostname,
			      const struct sockaddr *sap, socklen_t salen);
extern void tlshd_log_failure(const char *hostname,
			      const struct sockaddr *sap, socklen_t salen);

extern void tlshd_log_debug(const char *fmt, ...);
extern void tlshd_log_notice(const char *fmt, ...);
extern void tlshd_log_error(const char *fmt, ...);
extern void tlshd_log_perror(const char *prefix);
extern void tlshd_log_gai_error(int error);

extern void tlshd_log_cert_verification_error(gnutls_session_t session);
extern void tlshd_log_gnutls_error(int error);
extern void tlshd_gnutls_log_func(int level, const char *msg);
extern void tlshd_gnutls_audit_func(gnutls_session_t session, const char *msg);

void tlshd_log_gerror(const char *msg, GError *error);
void tlshd_log_nl_error(const char *msg, int err);

/* netlink.c */
extern void tlshd_genl_dispatch(void);
extern int tlshd_genl_get_handshake_parms(struct tlshd_handshake_parms *parms);
extern void tlshd_genl_done(struct tlshd_handshake_parms *parms);

/* server.c */
extern void tlshd_serverhello_handshake(struct tlshd_handshake_parms *parms);

#define TLS_DEFAULT_PRIORITIES	(NULL)
#define TLS_NO_PEERID		(0)
#define TLS_NO_CERT		(0)
#define TLS_NO_PRIVKEY		(0)
07070100000025000081A4000000000000000000000001646518CA00000A96000000000000000000000000000000000000002300000000ktls-utils-0.9/src/tlshd/tlshd.man.\"
.\" Copyright (c) 2022 Oracle and/or its affiliates.
.\"
.\" ktls-utils is free software; you can redistribute it and/or
.\" modify it under the terms of the GNU General Public License as
.\" published by the Free Software Foundation; version 2.
.\"
.\" This program is distributed in the hope that it will be useful,
.\" but WITHOUT ANY WARRANTY; without even the implied warranty of
.\" MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
.\" General Public License for more details.
.\"
.\" You should have received a copy of the GNU General Public License
.\" along with this program; if not, write to the Free Software
.\" Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
.\" 02110-1301, USA.
.\"
.\" tlshd(8)
.\"
.\" Copyright (c) 2021 Oracle and/or its affiliates.
.TH tlshd 8 "20 Dec 2021"
.SH NAME
tlshd \- TLS handshake for kernel TLS sockets
.SH SYNOPSIS
.BI "/usr/sbin/tlshd [" options "]"
.SH DESCRIPTION
The
.B tlshd
program implements a user agent that services TLS handshake requests
on behalf of kernel TLS consumers.
Using the
.BR accept (2)
system call, it materializes kernel socket endpoints in user space
in order to perform TLS handshakes using a TLS library.
After each handshake completes,
.B tlshd
plants TLS session metadata into the kernel socket to enable
the use of kTLS to secure subsequent communication on that socket.
.SH OPTIONS
.TP
.B \-c " or " \-\-config
When specified this option sets the location for
.BR tlshd 's
config file.
.TP
.B \-h " or " \-\-help
When specified
.B tlshd
displays a help message then exits immediately.
.TP
.B \-s " or " \-\-stderr
When specified this option forces messages to go to both
.I stderr
and the system log.
By default, messages go only to the system log.
.TP
.B \-v " or " \-\-version
When specified
.B tlshd
displays build version information then exits immediately.
.SH ENVIRONMENT VARIABLES
The GnuTLS library provides certain capabilities that can be enabled
by setting environment variables before
.B tlshd
is started.
More information about these variables is available
in GnuTLS library documentation.
.TP
.B SSLKEYLOGFILE
When set, this variable specifies the pathname of a file
to which the GnuTLS library appends
negotiated session keys in the NSS Key Log format.
The NSS Key Log format can be read by wireshark,
enabling decryption of recorded sessions.
.TP
.B GNUTLS_FORCE_FIPS_MODE
When set to `1', this variable forces the TLS library into FIPS mode
if FIPS140-2 support is available.
.SH NOTES
This software is a prototype.
It's purpose is for demonstration and as a proof-of-concept.
USE THIS SOFTWARE AT YOUR OWN RISK.
.SH SEE ALSO
.BR tlshd.conf (5),
.BR ssl (7)
.SH AUTHOR
Chuck Lever
07070100000026000041ED000000000000000000000002646518CA00000000000000000000000000000000000000000000001700000000ktls-utils-0.9/systemd07070100000027000081A4000000000000000000000001646518CA000003C0000000000000000000000000000000000000002300000000ktls-utils-0.9/systemd/Makefile.am#
# Copyright (c) 2022 Oracle and/or its affiliates.
#
# ktls-utils is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License as
# published by the Free Software Foundation; version 2.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
# 02110-1301, USA.
#

unit_files		= tlshd.service

EXTRA_DIST		= $(unit_files)
MAINTAINERCLEANFILES	= Makefile.in

unit_dir = /usr/lib/systemd/system

if INSTALL_SYSTEMD
install-data-hook: $(unit_files)
	mkdir -p $(DESTDIR)/$(unit_dir)
	cp $(unit_files) $(DESTDIR)/$(unit_dir)
endif
07070100000028000081A4000000000000000000000001646518CA000000E2000000000000000000000000000000000000002500000000ktls-utils-0.9/systemd/tlshd.service[Unit]
Description=Handshake service for kernel TLS consumers
Documentation=man:tlshd(8)
DefaultDependencies=no
Before=remote-fs-pre.target

[Service]
Type=simple
ExecStart=/usr/sbin/tlshd

[Install]
WantedBy=remote-fs.target
07070100000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000B00000000TRAILER!!!375 blocks

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File ktls-utils-0.9.obscpio of Package ktls-utils (Revision e9fa06174288b24354c54dac61ffe317)

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