doc: introduce ref_code_signing_helpers

Signed-off-by: Bastian Krause <bst@pengutronix.de>
Reviewed-by: Roland Hieber <rhi@pengutronix.de>
Tested-by: Ladislav Michl <ladis@linux-mips.org>
Message-Id: <20200617143125.23999-7-bst@pengutronix.de>
Signed-off-by: Michael Olbrich <m.olbrich@pengutronix.de>

2 files changed, 249 insertions, 0 deletions

diff --git a/doc/ref_code_signing_helpers.rst b/doc/ref_code_signing_helpers.rst
new file mode 100644
index 000000000..c3ffe01cb
--- /dev/null
+++ b/doc/ref_code_signing_helpers.rst
@@ -0,0 +1,248 @@
+.. _code_signing_helper_functions:
+
+Code Signing Helper Functions
+-----------------------------
+
+PTXdist provides various bash helper functions to be used in :ref:`code signing
+providers <code_signing_providers>` and :ref:`code signing consumers
+<code_signing_consumers>`.
+
+PTXdist stores URIs and CAs using these helpers in
+``$(PTXDIST_SYSROOT_HOST)/var/lib/keys/<signing-provider>/<role>/{uri,ca.pem}``.
+
+SoftHSM Provider Functions
+~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+These helpers initialize and import public/private keys and certificates into
+the SoftHSM.
+
+.. _cs_init_softhsm:
+
+cs_init_softhsm
+^^^^^^^^^^^^^^^
+
+Usage:
+
+.. code-block:: bash
+
+    cs_init_softhsm
+
+Initialize SoftHSM, and set the initial pins.
+
+cs_import_cert_from_der
+^^^^^^^^^^^^^^^^^^^^^^^
+
+Usage:
+
+.. code-block:: bash
+
+    cs_import_cert_from_der <role> <DER>
+
+Import certificate from a given DER file for role.
+To be used with SoftHSM only.
+
+Preconditions:
+
+- the role must have been defined (see :ref:`cs_define_role`)
+- SoftHSM must have been initialized (see :ref:`cs_init_softhsm`)
+
+cs_import_cert_from_pem
+^^^^^^^^^^^^^^^^^^^^^^^
+
+Usage:
+
+.. code-block:: bash
+
+    cs_import_cert_from_pem <role> <PEM>
+
+Import certificate from a given PEM file for role.
+To be used with SoftHSM only.
+
+Preconditions:
+
+- the role must have been defined (see :ref:`cs_define_role`)
+- SoftHSM must have been initialized (see :ref:`cs_init_softhsm`)
+
+cs_import_pubkey_from_pem
+^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Usage:
+
+.. code-block:: bash
+
+    cs_import_pubkey_from_pem <role> <PEM>
+
+Import public key from a given PEM file for role.
+To be used with SoftHSM only.
+
+Preconditions:
+
+- the role must have been defined (see :ref:`cs_define_role`)
+- SoftHSM must have been initialized (see :ref:`cs_init_softhsm`)
+
+cs_import_privkey_from_pem
+^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Usage:
+
+.. code-block:: bash
+
+    cs_import_privkey_from_pem <role> <PEM>
+
+Import private key from a given PEM file for role.
+To be used with SoftHSM only.
+
+Preconditions:
+
+- the role must have been defined (see :ref:`cs_define_role`)
+- SoftHSM must have been initialized (see :ref:`cs_init_softhsm`)
+
+cs_import_key_from_pem
+^^^^^^^^^^^^^^^^^^^^^^
+
+Usage:
+
+.. code-block:: bash
+
+    cs_import_key_from_pem <role> <PEM>
+
+Import private/public key pair from a given PEM file for role.
+To be used with SoftHSM only.
+
+Preconditions:
+
+- the role must have been defined (see :ref:`cs_define_role`)
+- SoftHSM must have been initialized (see :ref:`cs_init_softhsm`)
+
+Generic Provider Functions
+~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+These helpers allow to define roles, set PKCS#11 URIs and handle certificate
+authorities (CAs).
+HSM as well as SoftHSM code signing providers should use them.
+
+.. _cs_define_role:
+
+cs_define_role
+^^^^^^^^^^^^^^
+
+Usage:
+
+.. code-block:: bash
+
+    cs_define_role <role>
+
+Define new key role.
+
+A default PKCS#11 URI is set implicitly as convenience for SoftHSM use cases.
+
+.. _cs_set_uri:
+
+cs_set_uri
+^^^^^^^^^^
+
+Usage:
+
+.. code-block:: bash
+
+    cs_set_uri <role> <URI>
+
+Set given PKCS#11 URI for role.
+
+Preconditions:
+
+- the role must have been defined (see :ref:`cs_define_role`)
+
+.. _cs_append_ca_from_pem:
+
+cs_append_ca_from_pem
+^^^^^^^^^^^^^^^^^^^^^
+
+Usage:
+
+.. code-block:: bash
+
+    cs_append_ca_from_pem <role> <PEM>
+
+Append certificate from a given PEM file for role.
+
+Preconditions:
+
+- the role must have been defined (see :ref:`cs_define_role`)
+
+.. _cs_append_ca_from_der:
+
+cs_append_ca_from_der
+^^^^^^^^^^^^^^^^^^^^^
+
+Usage:
+
+.. code-block:: bash
+
+    cs_append_ca_from_der <role> <DER>
+
+Append certificate from a given DER file for role.
+
+Preconditions:
+
+- the role must have been defined (see :ref:`cs_define_role`)
+
+.. _cs_append_ca_from_uri:
+
+cs_append_ca_from_uri
+^^^^^^^^^^^^^^^^^^^^^
+
+Usage:
+
+.. code-block:: bash
+
+    cs_append_ca_from_uri <role> [<URI>]
+
+Append certificate from a given PKCS#11 URI for role.
+If URI is omitted the already set URI for role is used.
+
+Preconditions:
+
+- the role must have been defined (see :ref:`cs_define_role`)
+
+Consumer Functions
+~~~~~~~~~~~~~~~~~~
+
+Packages that want to sign something or need access to keys/CAs can retrieve
+PKCS#11 URIs and CAs with these helpers.
+
+.. _cs_get_uri:
+
+cs_get_uri
+^^^^^^^^^^
+
+Usage:
+
+.. code-block:: bash
+
+    cs_get_uri <role>
+
+Get PKCS#11 URI for role.
+
+Preconditions:
+
+- the URI must have been set (see :ref:`cs_set_uri`)
+
+.. _cs_get_ca:
+
+cs_get_ca
+^^^^^^^^^
+
+Usage:
+
+.. code-block:: bash
+
+    cs_get_ca <role>
+
+Get path to the CA in PEM format for role.
+
+Preconditions:
+
+- a certificate must have been appended to the CA
+  (see :ref:`cs_append_ca_from_pem`, :ref:`cs_append_ca_from_der`,
+  :ref:`cs_append_ca_from_uri`)
diff --git a/doc/ref_manual.rst b/doc/ref_manual.rst
index 850d72399..dea1610c6 100644
--- a/doc/ref_manual.rst
+++ b/doc/ref_manual.rst
@@ -7,3 +7,4 @@ PTXdist Reference
    ref_make_macros
    ref_rule_file_layout
    ref_parameter
+   ref_code_signing_helpers