feat: add common developer keys for signed firmware

To make images compatible with each other for development a comon set of keys
will be used. The keys are located on k-stufen.

* add script to download and extract keys
* adjustments to coreos-init-build-env script
* adjustments to check_files_exist function

coreos-init-build-env

@@ -87,10 +87,23 @@ coreos-bblayers-envsub COREOS_LAYERSDIR "${COREOS_ROOT}/layers"
 # Add support for ##COREOS_EXTLAYERSDIR## inside of bblayer template
 coreos-bblayers-envsub COREOS_EXTLAYERSDIR "${COREOS_ROOT}/external-layers"
 
-# Generate the ${BUILDDIR}/key directory. The scripts doesn't generate anything it
-# the directory already exist, so it's safe to call it everytime
+# Generate the ${BUILDDIR}/key directory. The scripts doesn't generate anything
+# if the directory already exist so it's safe to call it everytime
 # stdout is redirected to reduce the amount of output but not stderr
-coreos-keygen > /dev/null || {
-    echo "The coreos-keygen script has failed" >&2
-    return 1
-}
+#
+#Note: if a final build is detected all the dev keys are deleted
+
+if [ "$CreateFinal" = "true" ]; then
+    echo "\nFinal build detected delete dev keys and dont use or generate them" >&2
+    rm -rf "${BUILDDIR}/keys"
+else
+    echo "\nNo final build detected use development keys" >&2
+    coreos-get-dev-keys > /dev/null || {
+        echo "The coreos-get-dev-keys script has failed" >&2
+    }
+
+    coreos-keygen > /dev/null || {
+        echo "The coreos-keygen script has failed" >&2
+        return 1
+    }
+fi

documentation/.vscode/extensions.json

@@ -0,0 +1,7 @@
+{
+    "recommendations": [
+        "ms-vscode.makefile-tools",
+        "lextudio.restructuredtext",
+        "trond-snekvik.simple-rst"
+    ]
+}

documentation/.vscode/settings.json

@@ -0,0 +1,12 @@
+{
+    "files.watcherExclude": {
+        "**/_build/**": true,
+    },
+    "python.formatting.provider": "black",
+    "editor.rulers": [
+        80,
+        100,
+        120
+    ],
+    "esbonio.sphinx.confDir": ""
+}

documentation/boot/index.rst

@@ -11,3 +11,4 @@ Belden CoreOS Boot Concepts
 
    overview
    uboot
+   secure-boot

documentation/boot/secure-boot.rst

@@ -0,0 +1,268 @@
+*******************
+Secure Boot Concept
+*******************
+
+Currently CoreOS provide a Proof Of Concept of some of the secure boot element that we want to 
+implement a full secure-boot solution based on UEFI secure boot.
+
+The current proof of concept is structured as follows:
+
+Hardware Requirements
+=====================
+   
+   - The device must have an `eMMC`.
+   - The architecture of the device must be either `ARM32` or `AARCH64`.
+
+
+eMMC Embedded MultiMediaCard
+============================
+
+eMMC, or Embedded MultiMediaCard, represents a prevalent storage format in devices such as 
+smartphones, tablets, and other embedded systems. It encapsulates NAND flash memory and a dedicated
+controller within one package. This structure not only eases integration for device manufacturers
+but also ensures a compact, efficient storage medium.
+
+Within eMMC's architecture, distinct hardware partitions cater to diverse operational demands:
+
+.. graphviz::
+
+    digraph emmcStructure {
+        rankdir=TB;
+        node [shape=box, style=filled, fillcolor="#e6f2ff"];
+        edge [color="#0099cc", fontsize=12];
+
+        compound=true;
+
+        subgraph cluster_eMMC {
+            label="eMMC";
+            color="#0099cc";
+
+            Boot0 [label="Boot0"];
+            Boot1 [label="Boot1"];
+            RPMB [label="RPMB"];
+
+            subgraph cluster_User {
+                label="User";
+                color="#00cc99";
+                GPT [label="GPT Table"];
+
+                subgraph cluster_GPT {
+                    label="Software Partitions (GPT)";
+                    color="#99e6e6";
+
+                    SoftwarePartition1 [label="Partition 1"];
+                    SoftwarePartition2 [label="Partition 2"];
+                    SoftwarePartitionN [label="Partition N"];
+                }
+            }
+        }
+    }
+
+
+#. **Boot0 and Boot1**: The boot partitions cater to device start-up requirements, typically hosting
+   the firmware. Boot0 predominantly initiates the boot-up, while Boot1 stands as a secondary guard 
+   or backup, ensuring booting is resilient and failsafe.
+
+#. **RPMB (Replay Protected Memory Block)**: As a secure partition, RPMB shelters data against
+   potential tampering. It's tailored for sensitive information storage, such as cryptographic keys.
+   Its design counters data replays or rollbacks, fortifying against particular attack types.
+
+#. **User**: The primary storage domain, the User partition accommodates the OS, applications,
+   and user-centric data. It's reminiscent of the primary storage drive in larger computing devices.
+   Importantly, the User partition has a layered structure. Using the GPT (GUID Partition Table), it
+   is further divided into multiple software partitions, which can house diverse datasets or file
+   systems.
+
+The boot concept of CoreOS rely on the presence of an eMMC to implement the following feature:
+
+- Storage of two copy of the firmware with a way to switch from a copy to another using the eMMC
+  boot0 and boot1 hardware partition
+- Storage of keys used by the UEFI Secure Key specification inside the secure RPMB hardware
+  partition.
+- Storage of the bootloader, kernel and rootfs inside the user hardware partition using multiple
+  software partition in the GPT format.
+
+Firmware
+========
+
+The firmware of the device should implement a subset of the UEFI specification as defined in the
+ARM Base Boot Requirements (EBBR) and should implement the optional UEFI Secure Boot part of the
+EBBR specifications.
+
+This is done in CoreOS by levering the built-in EBBR and UEFI Secure Boot present into the u-boot
+project.
+
+The hardware should verify the validity of the firmware using a hardware specific way. Then the
+generic secure boot concept explained here can be used to valide all the following component of
+CoreOS.
+
+UEFI Key used by UEFI Secure Boot
+=================================
+
+
+- **PK (Platform Key)**: This top-tier key shoulders the responsibility of KEK verification and its
+  potential revocation. PK holders have the exclusive privilege to configure the KEK and the `db`
+  database. It's the gatekeeper ensuring only authorized software can touch the firmware or
+  bootloader.
+
+- **KEK (Key Exchange Key)**: As a medium for data exchange, the KEK is pivotal for signing the `db`
+  and `dbx` databases.
+  
+- **db (Allowed Database)**: This is the white list. It houses the keys or hashes of permitted
+  firmware and OS loaders. Execution is only granted to software with a signature that resonates
+  with the keys/hashes in this database.
+  
+- **dbx (Forbidden Database)**: The black sheep are here. Housing keys or hashes of known
+  unauthorized software, it ensures any associated software is prohibited from executing.
+
+Currently all theses public keys are built-in into u-boot at build time and are read only. In the
+future we will use the OP-TEE support into u-boot to use OP-TEE to manage the keys.
+
+OP-TEE and RPMB as key manager
+==============================
+
+OP-TEE, or Open Portable Trusted Execution Environment, is an open-source implementation of the
+Trusted Execution Environment (TEE) designed for ARM-powered platforms. In essence, a TEE is a
+secure enclave that provides a separated, isolated environment where specific applications and their
+data can run independently from the regular operating system, ensuring they are protected against
+potential tampering or unauthorized access.
+
+OP-TEE guarantees confidentiality, integrity, and authenticity for critical applications by
+executing them in this secure space. It offers a wide range of security features, including secure
+storage of cryptographic keys, secure boot, and hardware-backed crypto operations.
+
+In the context of UEFI secure boot, OP-TEE becomes instrumental. UEFI's secure boot mechanism
+ensures that only trusted, signed firmware, OS loaders, and OS kernels are executed during the boot
+process. To enforce this level of trust, UEFI relies on a set of cryptographic keys, including PK
+(Platform Key), KEK (Key Exchange Key), and db/dbx (allowed and forbidden signature databases).
+Safeguarding these keys is paramount to maintain the security and integrity of the boot process.
+
+By leveraging OP-TEE, these UEFI secure boot keys can be securely stored in the RPMB (Replay
+Protected Memory Block) partition of the eMMC. The RPMB is a write-protected, secure area of the
+eMMC designed to hold sensitive data and protect it against tampering and replay attacks.
+Since OP-TEE manages secure access to the RPMB partition, it ensures that the UEFI secure boot keys
+are not only safely stored but are also accessible only by authorized firmware components.
+
+eMMC User Partition
+===================
+
+The user partition of the eMMC must be structured using the GPT (GUID Partition Table) format.
+
+Within the GPT-formatted user partition, specific partitions should be established for efficient
+booting and system operation:
+
+1. **EFI**: This is the Essential Firmware Interface partition. It holds the `efibootguard`
+   os-loader binary, responsible for the boot sequence's initial steps and the kernel's selection
+   based on its configuration. This binary is signed with a key present in the `dbx` database
+
+2. **EBG0 - Efibootguard Config 0**: This partition houses the `efibootguard` configuration for the
+   first kernel option. Alongside the configuration file, it also contains a Unified Kernel Image
+   (UKI), a bundled package comprising the Linux kernel, device trees, and associated boot
+   components. The UKI is signed with a key present in the `dbx` database
+
+3. **EBG1 - Efibootguard Config 1**: Similar to EBG0, this partition carries the `efibootguard`
+   configuration for the second kernel option. It too holds a Unified Kernel Image tailored for this
+   alternate boot choice.
+
+4. **rootfs0**: This partition stores the CoreOS root filesystem designed to complement and operate
+   with the kernel embedded in the EBG0 partition. It provides the essential system files and 
+   structures required for the operating system's functioning when the kernel from EBG0 is booted. 
+   Integrety of this rootfs is assured by storing an hash of the rootfs inside the UKI image.
+
+5. **rootfs1**: Analogous to `rootfs0`, this partition houses the CoreOS root filesystem tailored
+   for the kernel within the EBG1 partition. It ensures that, should the system boot from the kernel
+   in EBG1, the appropriate file structures and system components are readily available.
+
+EFIBootGuard Configuration
+==========================
+
+Efibootguard, as a part of its design, employs a configuration system to determine the appropriate
+kernel and associated resources to boot from. This configuration is stored in distinct partitions, 
+EBG0 and EBG1, each holding its configuration file.
+
+The configuration file itself comprises several fields, but most crucially, it contains a revision
+field. This field is a numerical identifier indicating the version or update level of the contained
+kernel and resources. When the system initiates its boot sequence, Efibootguard assesses the
+revision values in both the EBG0 and EBG1 configuration files.
+
+The selection process is straightforward yet robust: Efibootguard chooses the partition with the
+higher revision value. By doing so, it inherently opts for the most recent or updated kernel version
+available. However, this system also supports failover mechanisms. In case the kernel in the
+partition with the higher revision encounters issues during boot, Efibootguard can revert to the
+other partition, ensuring resilience and continuity in system operations.
+
+Moreover, the choice isn't rigidly fixed. When the system undergoes updates, the configuration files
+can be rewritten, and the revision values adjusted, allowing for dynamic and flexible booting in
+line with system evolutions and updates. In essence, Efibootguard, with its configuration-based
+approach, ensures a blend of up-to-date system booting and built-in fail-safes for dependable
+operation.
+
+Unified Kernel Image
+====================
+
+After having choosen the right configuration file, Efibootguard takes on the responsibility of
+launching the Unified Kernel Image (UKI) linked with the active configuration. This image bundle
+together essential boot components like the Linux kernel, device trees, and the kernel command
+line. The secure initiation of this image is paramount, and Efibootguard ensures this by leveraging
+UEFI's start_image system call.
+
+The UEFI start_image system call  verifies the image's signature against the Secure Boot keys
+(PK, KEK, db, and potentially dbx). If the signature matches, indicating that the image is trusted
+and hasn't been tampered with, the image is permitted to execute. If not, the booting halts,
+preventing any unauthorized or potentially malicious code from running.
+
+Once the UKI has been securely initiated, it undertakes multiple tasks. It first extracts the
+necessary components from the bundled package, identifying and utilizing the appropriate device
+trees based on `compatible` node, by matching with the `compatible` node of the `device-tree` that
+is built into the firmware. These device trees inform the system about the hardware configuration,
+ensuring the kernel interacts correctly with the system's components. 
+
+The UKI os-launcher also has CoreOS specialized patches, enabling dynamic rootfs switching without
+requiring an initramfs by changing the `root=` part of the kernel command line at run time to
+point to the right rootfs partition.
+
+RootFS and dm-verity
+====================
+
+dm-verity is a Linux kernel feature designed to provide transparent integrity checking of block
+devices, particularly for read-only file systems. Rooted in cryptographic principles, dm-verity
+employs a hash-based approach to ensure and validate the integrity of the root filesystem (rootfs).
+
+The way dm-verity operates is by building a Merkle tree, a structure where each leaf node contains a
+hash of a block of the underlying data, while each non-leaf node is a hash of its children. The
+topmost node, the root of the Merkle tree, provides a cumulative hash representing the entirety of
+the data. This top hash, known as the root hash, serves as a concise, cryptographic representation
+of the entire filesystem's state.
+
+When integrating dm-verity with the Unified Kernel Image (UKI), an additional layer of security is
+established. By embedding the root hash into the signed UKI, any tampering or modification in the
+rootfs can be swiftly detected. When the system boots, the UKI, being signed, ensures that the
+embedded root hash is legitimate and untampered. As the OS accesses the rootfs, dm-verity
+recalculates the hash values in real-time and compares them to the values in the original Merkle
+tree, referenced by the embedded root hash.
+
+If any discrepancies are found – that is, if the recalculated hash doesn't match the stored value –
+it indicates potential tampering, and the OS can halt access or take appropriate measures. 
+
+.. graphviz::
+
+    digraph SecureBootFlow {
+        rankdir=TB;
+
+        node [shape=box, style=filled, fillcolor="#e6f2ff"];
+        edge [color="#0099cc", fontsize=12];
+
+        Hardware [label="Hardware\n(ARM32/AARCH64 with eMMC)"];
+        Firmware [label="u-boot Firmware\n(UEFI EBRR subset)"];
+        eMMCConfig [label="eMMC Configuration\n(GPT with EFI partition)"];
+        EFIBootGuard [label="EFIBootGuard\n(A/B Kernel Switching)"];
+        UnifiedKernel [label="Unified Kernel Image\n(Kernel, cmd line, DTB)"];
+        KernelAndRootFS [label="Kernel & RootFS\n(dm-verity validation)"];
+
+        Hardware -> Firmware [label="Flashed with u-boot\n+ Built-in keys"];
+        Firmware -> eMMCConfig [label="eMMC boot"];
+        eMMCConfig -> EFIBootGuard [label="Boots from EFI partition"];
+        EFIBootGuard -> UnifiedKernel [label="Selects kernel A/B"];
+        UnifiedKernel -> KernelAndRootFS [label="Kernel boot\n+ RootFS verification"];
+
+    }

documentation/index.rst

@@ -40,6 +40,7 @@ same structures.
 
    Installation Manual <installation/index>
    Reference Manual <ref-manual/index>
+   Testing Manual <testing/index>
    Boot Concepts <boot/index>
    Best Practices <best_practices/index>
 

documentation/testing/bats.rst

@@ -0,0 +1,354 @@
+.. index:: BATS
+
+************************************
+BATS - Bash Automated Testing System
+************************************
+
+The CoreOS distribution supports writing tests using shell syntax by providing the `bats` command.
+
+If you want to use `bats`, you will need the following CoreOS packages:
+
+- bats
+- bats-file
+- bats-assert
+
+Overview of BATS
+================
+
+A BATS test can be as simple as a single .bats file. For example:
+
+.. code-block:: bash
+
+    #!/usr/bin/env bats
+   
+    bats_load_library bats-support
+    bats_load_library bats-assert
+
+    @test "can output to stdout" {
+        run echo hello
+        assert_output 'hello'
+    }
+
+You can run it using the command `bats <filename>.bats`
+
+This will give you the following output:
+
+.. code-block:: bash
+
+    sam@SAVE:~/Projects/tests$ bats <filename>.bats 
+    <filename>.bats
+    ✓ can output to stdout
+
+    1 test, 0 failures
+
+The run command
+================
+
+In shell tests, you often need to run commands and capture their output, exit
+status, and error messages. The run command provided by `bats` allows you to
+execute commands within your test cases and collect this information for later
+assertion and validation.
+
+The run command will make the following variables available:
+
+- `${status}`: exit code of the command run by `run`
+- `${output}`: combined content of `stdout` and `stderr`
+- `${lines[@]}`: array of lines of the output
+- `${BATS_RUN_COMMAND}`: command run by the `run` command
+
+.. code-block:: bash
+
+    @test "invoking foo with a nonexistent file prints an error" {
+        run foo nonexistent_filename
+        [ "$status" -eq 1 ]
+        [ "$output" = "foo: no such file 'nonexistent_filename'" ]
+        [ "$BATS_RUN_COMMAND" = "foo nonexistent_filename" ]
+
+    }
+
+The `run` command accepts some parameters:
+
+- `-N`: Expect N as exit status and fail otherwise
+- `-!`: Expect non-zero exit status and fail if the command succeeds.
+- `--keep-empty-lines`: don't remove empty lines from `${lines}`
+- `--separate-stderr`: Use separate variables for stderr `${stderr}` and `${stderr_lines[@]}`
+
+.. code-block:: bash
+
+    @test "invoking foo without arguments prints usage" {
+        run -1 foo
+        [ "${lines[0]}" = "usage: foo <filename>" ]
+    }
+
+The bats-assert helper
+======================
+
+The `bats-assert` helper provides some functions to create more readable tests.
+These assertions use the variables created by the `run` command and can be used
+as follows:
+
+.. code-block:: bash
+
+    @test 'assert_output()' {
+        run echo 'have'
+        assert_output 'want'
+    }
+
+The following functions are provided:
+
+- `assert` and `refute`: Assert that a given expression evaluates to true or false.
+- `assert_equal`: Assert that two parameters are equal.
+- `assert_not_equal`: Assert that two parameters are not equal.
+- `assert_success` and `assert_failure`: Assert that the exit status is 0 or 1.
+- `assert_output` and `refute_output`: Assert that the output does (or does not) contain the given content.
+- `assert_line` and `refute_line`: Assert that a specific line of the output does (or does not) contain the given content.
+- `assert_regex` and `refute_regex`: Assert that a parameter matches (or does not match) the given pattern.
+
+The bats-file helper
+====================
+
+The `bats-file` helper provides functions to help work with files in tests:
+
+**Test File Types:**
+
+- `assert_exists` and `assert_not_exists`: Check if a file or directory exists.
+- `assert_file_exists` and `assert_file_not_exists`: Check if a file exists.
+- `assert_dir_exists` and `assert_dir_not_exists`: Check if a directory exists.
+- `assert_link_exists` and `assert_link_not_exists`: Check if a link exists.
+- `assert_block_exists` and `assert_block_not_exists`: Check if a block special file exists.
+- `assert_character_exists` and `assert_character_not_exists`: Check if a character special file exists.
+- `assert_socket_exists` and `assert_socket_not_exists`: Check if a socket exists.
+- `assert_fifo_exists` and `assert_fifo_not_exists`: Check if a fifo special file exists.
+
+**Test File Attributes:**
+
+- `assert_file_executable` and `assert_file_not_executable`
+- `assert_file_owner` and `assert_file_not_owner`
+- `assert_file_permission` and `assert_not_file_permission`
+- `assert_file_size_equals`
+- `assert_size_zero` and `assert_size_not_zero`
+- `assert_file_group_id_set` and `assert_file_not_group_id_set`
+- `assert_file_user_id_set` and `assert_file_not_user_id_set`
+- `assert_sticky_bit` and `assert_no_sticky_bit`
+
+**Test File Content:**
+
+- `assert_file_empty` and `assert_file_not_empty`
+- `assert_file_contains` and `assert_file_not_contains`
+- `assert_symlink_to` and `assert_not_symlink_to`
+
+**Working with a temporary directory:**
+
+- `temp_make` and `temp_del`
+
+Pre- and Post-test case hooks
+==============================
+
+In some cases, it's useful to have a function that runs before or after each test
+case in a bats file.
+
+A function named `setup` will run before each test case, and a function
+named `teardown` will run after each test case.
+
+This example creates a directory in the setup function but lacks a teardown
+that removes the directory. The second time the setup function is run, the
+setup will fail as the directory already exists:
+
+.. code-block:: bash
+
+    #!/usr/bin/env bats
+
+    bats_load_library bats-support
+    bats_load_library bats-assert
+    bats_load_library bats-file
+
+    setup() {
+        mkdir tmp
+        echo 'a' >> ./tmp/test
+    }
+
+    @test "test contains a single a I" {
+        assert_file_contains ./tmp/test '^a$'
+    }
+
+    @test "test contains a single a II" {
+        assert_file_contains ./tmp/test '^a$'
+    }
+
+.. code-block:: bash
+
+    sam@SAVE:~/Projects/tests$ bats test.bats 
+    test.bats
+    ✓ test contains a single a I
+    ✗ test contains a single a II
+    (from function `setup' in test file test.bats, line 8)
+        `mkdir tmp' failed
+    mkdir: cannot create directory ‘tmp’: File exists
+
+    2 tests, 1 failure
+
+This can be easily fixed by adding a teardown function:
+
+.. code-block:: bash
+
+    #!/usr/bin/env bats
+
+    bats_load_library bats-support
+    bats_load_library bats-assert
+    bats_load_library bats-file
+
+    setup() {
+        mkdir tmp
+        echo 'a' >> ./tmp/test
+    }
+
+    teardown() {
+        rm -rf ./tmp
+    }
+
+
+
+    @test "test contains a single a I" {
+        assert_file_contains ./tmp/test '^a$'
+    }
+
+    @test "test contains a single a II" {
+        assert_file_contains ./tmp/test '^a$'
+    }
+
+.. code-block:: bash
+
+    sam@SAVE:~/Projects/tests$ bats test.bats 
+    test.bats
+     ✓ test contains a single a I
+     ✓ test contains a single a II
+
+    2 tests, 0 failures
+
+Pre- and Post-test file hooks
+=============================
+
+To run some code before executing a test file or after executing it, the
+functions `setup_file` and `teardown_file` can be used.
+
+The last example could be refactored to only create the tmp directory once:
+
+.. code-block:: bash
+
+    #!/usr/bin/env bats
+
+    bats_load_library bats-support
+    bats_load_library bats-assert
+    bats_load_library bats-file
+
+    setup_file() {
+        export DIR="./tmp"
+        export FILE="${DIR}/test"
+        mkdir "${DIR}"
+    }
+
+    teardown_file() {
+        rm -rf "${DIR}"
+    }
+
+    setup() {
+        echo 'a' >> "${FILE}"
+    }
+
+    teardown() {
+        rm "${FILE}"
+    }
+
+    @test "test contains a single a I" {
+        assert_file_contains "${FILE}" '^a$'
+    }
+
+    @test "test contains a single a II" {
+        assert_file_contains "${FILE}" '^a$'
+    }
+
+Multiple files
+==============
+
+With `bats`, a file is a test suite. If you have multiple `bats` files in a
+directory and you provide the directory in the `bats` command line, `bats`
+will execute all the test suites.
+
+Example: `bats .` 
+
+.. code-block:: bash
+
+    sam@SAVE:~/Projects/tests$ bats .
+    ./first.bats
+    ✓ can run our script
+    ✗ second test
+    (in test file ./first.bats, line 27)
+        `false' failed
+    ./second.bats
+    ✓ multi file
+    ./test.bats
+    ✓ test contains a single a I
+    ✓ test contains a single a II
+
+    5 tests, 1 failure
+
+Pre- and Post-suite hooks
+=========================
+
+If you want to execute the same function before each test suite or after
+each test suite, create a file named `setup_suite.bash`. In this file,
+create a function named `setup_suite()` and another named `teardown_suite()`.
+
+Exporting the test results
+==========================
+
+Test results can be exported using the JUnit XML format. This can then be
+used in other tools and merged with other JUnit XML formats to generate a final
+test report.
+
+Example:
+
+.. code-block:: bash
+
+    sam@SAVE:~/Projects/tests$ bats . -F junit
+
+This will produce the following XML content on stdout:
+
+.. code-block:: xml
+
+    <?xml version="1.0" encoding="UTF-8"?>
+    <testsuites time="0.048">
+    <testsuite name="./first.bats" tests="2" failures="1" errors="0" skipped="0" time="0.025" timestamp="2023-08-16T14:22:15" hostname="SAVE">
+        <testcase classname="./first.bats" name="can run our script" time="0.013" />
+        <testcase classname="./first.bats" name="second test" time="0.012">
+            <failure type="failure">(in test file ./first.bats, line 27)
+    `false&#39; failed</failure>
+        </testcase>
+
+    </testsuite>
+    <testsuite name="./second.bats" tests="1" failures="0" errors="0" skipped="0" time="0.008" timestamp="2023-08-16T14:22:15" hostname="SAVE">
+        <testcase classname="./second.bats" name="multi file" time="0.008" />
+
+    </testsuite>
+    <testsuite name="./test.bats" tests="2" failures="0" errors="0" skipped="0" time="0.015" timestamp="2023-08-16T14:22:15" hostname="SAVE">
+        <testcase classname="./test.bats" name="test contains a single a I" time="0.008" />
+        <testcase classname="./test.bats" name="test contains a single a II" time="0.007" />
+
+    </testsuite>
+    </testsuites>
+
+Going further
+=============
+
+`bats` scripts can be checked with shellcheck for common mistakes.
+
+The `bats-assert` add-on provides many helper functions to perform
+assertions with a more readable syntax than the shell's built-in syntax.
+
+See https://github.com/bats-core/bats-assert
+
+The `bats-file` add-on provides helper functions to check for files. See
+https://github.com/bats-core/bats-file/
+
+You can find a list of projects using `bats` on this page:
+https://github.com/bats-core/bats-core/wiki/Projects-Using-Bats

documentation/testing/index.rst

@@ -0,0 +1,15 @@
+
+==============================
+Belden CoreOS Testing Manual
+==============================
+
+This manual is a work on progress on how to test and how to write test for
+CoreOS or CoreOS based distribution.
+
+|
+
+.. toctree::
+   :caption: Table of Contents
+   :numbered:
+
+   bats

layers/meta-belden-coreos-bsp/conf/machine/eagle40-03.conf

@@ -0,0 +1,40 @@
+#@TYPE: Machine
+#@NAME: eagle40-03
+#@DESCRIPTION: Machine support for EAGLE40-03
+#
+
+require include/coreos-generic-arch/x64.inc
+
+MACHINE_FEATURES += "pci usbhost x86 acpi serial efi tpm2 "
+
+# Kernel configuration
+# ******************************************************************************
+
+PREFERRED_VERSION_linux-yocto ?= "5.15%"
+PREFERRED_PROVIDER_virtual/kernel ?= "linux-yocto"
+
+KERNEL_IMAGETYPE = "bzImage"
+
+#  getty configuration
+# ******************************************************************************
+
+SERIAL_CONSOLES = "115200;ttyS0"
+SERIAL_CONSOLES_CHECK = "ttyS0"
+APPEND += "console=ttyS0,115200"
+
+# Image generation
+# ******************************************************************************
+
+# Ensure that both flash-image.bin and boot.scr are generated as they are needed
+# for a wic image
+WKS_FILE = "generic-uefi.wks.in"
+# COREOS_INSTALLER_WKS_FILE ?= ""  --> TBD
+IMAGE_FSTYPES += "wic.xz wic.bmap"
+
+MACHINE_ESSENTIAL_EXTRA_RDEPENDS += " kernel-modules"
+# COREOS_IMAGE_SWUPDATE_EXTRACLASSES += "" --> TBD
+
+# No watchdog available yet
+EFIBOOTGUARD_TIMEOUT ?= "0"
+require conf/machine/include/coreos-generic-features/efi.inc
+require conf/machine/include/coreos-generic-features/partitions.inc

layers/meta-belden-coreos-bsp/conf/machine/include/coreos-generic-features/partitions.inc

@@ -2,8 +2,8 @@
 # Variable used in WKS file
 
 WKS_PART_EFI ??= 'part --source efibootguard-efi --label efi --part-type=EF00'
-WKS_PART_EFIBOOTGUARD_A ??= 'part --source efibootguard-boot --label ebg0 --part-type=0700 --sourceparams "args=coreos.root=rootfs0,watchdog=${EFIBOOTGUARD_TIMEOUT},revision=2,kernel=kernel-${MACHINE}.efi;KERNEL.EFI"'
-WKS_PART_EFIBOOTGUARD_B ??= 'part --source efibootguard-boot --label ebg1 --part-type=0700 --sourceparams "args=coreos.root=rootfs1,watchdog=${EFIBOOTGUARD_TIMEOUT},revision=1,kernel=kernel-${MACHINE}.efi;KERNEL.EFI"'
+WKS_PART_EFIBOOTGUARD_A ??= 'part --source efibootguard-boot --label ebg0 --part-type=0700 --sourceparams "args=coreos.root=rootfs0,watchdog=${EFIBOOTGUARD_TIMEOUT},revision=2,kernel=${COREOS_KERNEL_FILENAME};KERNEL.EFI"'
+WKS_PART_EFIBOOTGUARD_B ??= 'part --source efibootguard-boot --label ebg1 --part-type=0700 --sourceparams "args=coreos.root=rootfs1,watchdog=${EFIBOOTGUARD_TIMEOUT},revision=1,kernel=${COREOS_KERNEL_FILENAME};KERNEL.EFI"'
 WKS_PART_ROOT_A ??= 'part / --source rootfs --fstype=ext4 --label rootfs0'
 WKS_PART_ROOT_B ??= 'part --fstype=ext4 --label rootfs1'
 WKS_PART_ROOT_SIZE ??= '2G'

layers/meta-belden-coreos-bsp/conf/machine/include/coreos-generic-machine/vm.inc

@@ -11,7 +11,7 @@ PREFERRED_PROVIDER_virtual/kernel ?= "linux-yocto"
 
 MACHINE_EXTRA_RRECOMMENDS += "kernel-modules linux-firmware"
 
-IMAGE_FSTYPES += "ext4 wic wic.xz wic.bmap wic.vmdk"
+IMAGE_FSTYPES += "ext4 wic wic.xz wic.bmap wic.vmdk wic.vhdx"
 
 WKS_FILE ?= "generic-uefi.wks.in"
 do_image_wic[depends] += "gptfdisk-native:do_populate_sysroot"

layers/meta-belden-coreos-bsp/recipes-kernel/linux/files/hyperv.cfg

@@ -0,0 +1,16 @@
+CONFIG_HYPERVISOR_GUEST=y
+CONFIG_PARAVIRT=y
+CONFIG_PARAVIRT_SPINLOCKS=y
+CONFIG_CONNECTOR=y
+CONFIG_SCSI_FC_ATTRS=y
+CONFIG_HYPERV=y
+CONFIG_HYPERV_UTILS=y
+CONFIG_HYPERV_BALLOON=y
+CONFIG_HYPERV_STORAGE=y
+CONFIG_HYPERV_NET=y
+CONFIG_HYPERV_KEYBOARD=y
+CONFIG_FB_HYPERV=y
+CONFIG_HID_HYPERV_MOUSE=y
+CONFIG_PCI_HYPERV=y
+CONFIG_VSOCKETS=y
+CONFIG_HYPERV_VSOCKETS=y

layers/meta-belden-coreos-bsp/recipes-kernel/linux/files/k3s_kernel_adaptions.cfg

@@ -0,0 +1,8 @@
+#this file contains the necssary kernel adaption that k3s an containerd require
+#Reference
+#k3s config check: https://raw.githubusercontent.com/k3s-io/k3s/master/contrib/util/check-config.sh
+#container config check: https://raw.githubusercontent.com/moby/moby/master/contrib/check-config.sh
+#these scripts are provided by moby and rancher
+CONFIG_OABI_COMPAT=n
+CONFIG_HAVE_ARCH_SECCOMP_FILTER=y
+CONFIG_SECCOMP_FILTER=y

layers/meta-belden-coreos-bsp/recipes-kernel/linux/linux-yocto_5.15.bbappend

@@ -1,9 +1,18 @@
+FILESEXTRAPATHS:prepend := "${THISDIR}/files:"
 KMACHINE:vm-x64 ?= "common-pc-64"
 COMPATIBLE_MACHINE:vm-x64 = "vm-x64"
 
 # Enable some kernel features related to virtualiuzation
 KERNEL_FEATURES:append:vm-x64=" cfg/virtio.scc cfg/paravirt_kvm.scc"
 
+
+KMACHINE:eagle40-03 ?= "common-pc-64"
+KBRANCH:eagle40-03 = "v5.15/standard/base"
+SRCREV_machine:eagle40-03 ?= "3baf1c5c0e6084b3f4a1d2d805168d657f872e60"
+COMPATIBLE_MACHINE:eagle40-03 = "eagle40-03"
+LINUX_VERSION:eagle40-03 = "5.15.134"
+
+
 KBRANCH:beaglebone = "v5.15/standard/beaglebone"
 KMACHINE:beaglebone ?= "beaglebone"
 SRCREV_machine:beaglebone ?= "9aabbaa89fcb21af7028e814c1f5b61171314d5a"
@@ -11,3 +20,6 @@ COMPATIBLE_MACHINE:beaglebone = "beaglebone"
 LINUX_VERSION:beaglebone = "5.15.54"
 
 require ${@bb.utils.contains("COMBINED_FEATURES", "efi", "linux-yocto-coreos-efi.inc", "", d)}
+
+SRC_URI += " file://k3s_kernel_adaptions.cfg"
+SRC_URI:append:vm-x64 = " file://hyperv.cfg"

layers/meta-belden-coreos-demo/recipes-core/images/coreos-image-demo-k3s.bb

@@ -0,0 +1,6 @@
+DESCRIPTION = "An image that includes k3s-agent"
+
+require recipes-core/images/coreos-image-all-features.bb
+
+IMAGE_INSTALL += "k3s-agent"
+

layers/meta-belden-coreos/classes/coreos-image-swupdate.bbclass

@@ -69,5 +69,11 @@ def coreos_swupdate_extends(d, s, key):
 
     return text
 
+# Signature support
+inherit coreos-efi-secureboot
+SWUPDATE_SIGNING = "CMS"
+SWUPDATE_CMS_KEY  = "${COREOS_EFI_SECUREBOOT_KEYDIR}/swupdate.key"
+SWUPDATE_CMS_CERT = "${COREOS_EFI_SECUREBOOT_KEYDIR}/swupdate.crt"
+
 COREOS_IMAGE_SWUPDATE_EXTRACLASSES ?= ""
 inherit ${COREOS_IMAGE_SWUPDATE_EXTRACLASSES}

layers/meta-belden-coreos/recipes-support/swupdate/swupdate/25-sw-collections-config.sh

@@ -37,3 +37,6 @@ case $ROOT_PARTLABEL in
         exit 1
         ;;
 esac
+
+echo "Public key used to verify software image is /usr/lib/swupdate/swupdate.crt"
+SWUPDATE_ARGS="${SWUPDATE_ARGS} -k /usr/lib/swupdate/swupdate.crt"

layers/meta-belden-coreos/recipes-support/swupdate/swupdate/defconfig

@@ -24,3 +24,7 @@ CONFIG_DISKPART=y
 CONFIG_DISKPART_FORMAT=y
 CONFIG_FAT_FILESYSTEM=y
 CONFIG_EXT_FILESYSTEM=y
+CONFIG_SIGNED_IMAGES=y
+CONFIG_SIGALG_RAWRSA=n
+CONFIG_SIGALG_CMS=y
+CONFIG_CMS_IGNORE_CERTIFICATE_PURPOSE=y

layers/meta-belden-coreos/recipes-support/swupdate/swupdate_%.bbappend

@@ -37,9 +37,12 @@ RRECOMMENDS:${PN} += "${PN}-coreos-config"
 # configuration to be installed
 RCONFLICTS:${PN}-coreos-installer-config = "${PN}-coreos-config"
 
+inherit coreos-efi-secureboot
+
 do_install:append() {
     # Probably replace revision with the value of the device tree
     install -m 755 ${WORKDIR}/50-webserver-config.sh ${D}${libdir}/swupdate/conf.d/
     install -m 755 ${WORKDIR}/25-sw-collections-config.sh ${D}${libdir}/swupdate/conf.d/
+    install -m 755 ${COREOS_EFI_SECUREBOOT_KEYDIR}/swupdate.crt ${D}${libdir}/swupdate/
     echo "${MACHINE} 1.0" > ${D}${sysconfdir}/hwrevision
 }

scripts/coreos-get-dev-keys

@@ -0,0 +1,88 @@
+#!/usr/bin/env bash
+
+# This script will get development keys needed by the UEFI secure boot
+# implementation from the k-stufen web share and put the under $BUILDDIR/keys
+#
+# The reason for every developer to have the same keys is that image/update
+# filest are interchangable.
+# Those developer keys are used for all builds except the ones that are marked
+# as final. Here the official keys will be used.
+#
+# Following keys will be downloaded
+# db.auth  db.der  db.key    KEK.crt  KEK.esl  PK.auth  PK.der  PK.key
+# db.crt   db.esl  KEK.auth  KEK.der  KEK.key  PK.crt   PK.esl
+
+# This script is used every time the build environment of CoreOS is sourced
+# Note: in the build environment stdout is redirected to /dev/null but not
+# stderr.
+
+set -e
+
+# Logging helper
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+BOLD='\033[1m'
+RESET='\033[0m'
+
+# Ensure that BUILDDIR is defined
+# ==============================================================================
+# This is usually done inside the coreos-init-build-env script
+
+
+if [ -z "$BUILDDIR" ]; then 
+    echo -e "${RED}BUILDDIR is not defined${RESET}" 2>&1
+    echo -e "Have you run the coreos-init-buildenv script?" 2>&1
+    exit 1
+fi
+
+# We need the KEYDIR directory to exist
+# ==============================================================================
+
+KEYDIR="${BUILDDIR}/keys"
+mkdir -p "${KEYDIR}"
+cd "${KEYDIR}"
+
+# we need wget and tar
+# ==============================================================================
+
+assert_command_in_path() {
+    if command -v "$1" >/dev/null 2>&1; then
+        echo -e "✓ Command ${GREEN}${1}${RESET} was found"
+    else
+        echo -e "✗ ${RED}Command ${BOLD}${1}${RESET}${RED} was not found in your path${RESET}" >&2 
+        echo -e "Please check the coreos-documentation for the list of required packages" >&2 
+        exit 1
+    fi
+}
+
+assert_command_in_path wget
+assert_command_in_path tar
+
+
+# Generate all they keys, as needed
+# ==============================================================================
+# Only generate the file if it's missing and don't fail if the file already
+# exist
+
+check_files_exist() {
+    RET=0
+    for file in "$@"; do
+        if [ ! -e "$file" ]; then
+            echo -e "𐄂 File ${RED}${file}${RESET} missing"
+            RET=1
+        else
+            echo -e "✓ File ${GREEN}${file}${RESET} already exist"
+        fi
+    done
+    return $RET
+}
+
+check_files_exist db.auth db.crt db.der db.esl db.key KEK.auth KEK.crt KEK.der \
+                  KEK.esl KEK.key PK.auth PK.crt PK.der PK.esl PK.key || \
+{
+    echo -e "${RED}Incosistent or no keys.${RESET}"
+    echo "Downloading Keys"
+    wget -q https://platform-nas.gad.local/K-Stufen/CoreOS/.signing/coreos_developer_signing.keys.tar.gz && \
+    tar -xzf coreos_developer_signing.keys.tar.gz -C ${BUILDDIR}/keys && \
+    rm coreos_developer_signing.keys.tar.gz
+}

scripts/coreos-keygen

@@ -58,13 +58,16 @@ assert_command_in_path sign-efi-sig-list
 # exist
 
 check_files_exist() {
+    RET=0
     for file in "$@"; do
-        echo -e "✓ File ${GREEN}${file}${RESET} already exist"
         if [ ! -e "$file" ]; then
-            return 1
+            echo -e "𐄂 File ${RED}${file}${RESET} missing"
+            RET=1
+        else
+            echo -e "✓ File ${GREEN}${file}${RESET} already exist"
         fi
     done
-    return 0
+    return $RET
 }
 
 echo "Generating private/public keys in .key/.crt format for PK, KEK et db"
@@ -108,3 +111,7 @@ echo "Generatic DER files with PK, KEK et db public key"
 check_files_exist PK.der || openssl x509 -in PK.crt -outform der -out PK.der
 check_files_exist KEK.der || openssl x509 -in KEK.crt -outform der -out KEK.der
 check_files_exist db.der || openssl x509 -in db.crt -outform der -out db.der
+
+# keys needed to sign and verify SWUpdate
+check_files_exist swupdate.key swupdate.crt || openssl req -x509 -newkey rsa:4096 -nodes -keyout swupdate.key \
+    -out swupdate.crt -subj "/O=SWUpdate /CN=target"