From 1079962e4c06f88a54e50d997c1b7e84303d30b4 Mon Sep 17 00:00:00 2001
From: Bernhard Schmidt <berni@debian.org>
Date: Sat, 15 Aug 2020 21:29:50 +0200
Subject: New upstream version 2.5~beta1

---
 doc/man-sections/encryption-options.rst | 135 ++++++++++++++++++++++++++++++++
 1 file changed, 135 insertions(+)
 create mode 100644 doc/man-sections/encryption-options.rst

(limited to 'doc/man-sections/encryption-options.rst')

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+Encryption Options
+==================
+
+SSL Library information
+-----------------------
+
+--show-ciphers
+  (Standalone) Show all cipher algorithms to use with the ``--cipher``
+  option.
+
+--show-digests
+  (Standalone) Show all message digest algorithms to use with the
+  ``--auth`` option.
+
+--show-tls
+  (Standalone) Show all TLS ciphers supported by the crypto library.
+  OpenVPN uses TLS to secure the control channel, over which the keys that
+  are used to protect the actual VPN traffic are exchanged. The TLS
+  ciphers will be sorted from highest preference (most secure) to lowest.
+
+  Be aware that whether a cipher suite in this list can actually work
+  depends on the specific setup of both peers (e.g. both peers must
+  support the cipher, and an ECDSA cipher suite will not work if you are
+  using an RSA certificate, etc.).
+
+--show-engines
+  (Standalone) Show currently available hardware-based crypto acceleration
+  engines supported by the OpenSSL library.
+
+--show-groups
+  (Standalone) Show all available elliptic curves/groups to use with the
+  ``--ecdh-curve`` and ``tls-groups`` options.
+
+Generating key material
+-----------------------
+
+--genkey args
+  (Standalone) Generate a key to be used of the type keytype. if keyfile
+  is left out or empty the key will be output on stdout. See the following
+  sections for the different keytypes.
+
+  Valid syntax:
+  ::
+
+     --genkey keytype keyfile
+
+  Valid keytype arguments are:
+
+  :code:`secret`                Standard OpenVPN shared secret keys
+
+  :code:`tls-crypt`             Alias for :code:`secret`
+
+  :code:`tls-auth`              Alias for :code:`secret`
+
+  :code:`auth-token`            Key used for ``--auth-gen-token-key``
+
+  :code:`tls-crypt-v2-server`   TLS Crypt v2 server key
+
+  :code:`tls-crypt-v2-client`   TLS Crypt v2 client key
+
+
+  Examples:
+  ::
+
+     $ openvpn --genkey secret shared.key
+     $ openvpn --genkey tls-crypt shared.key
+     $ openvpn --genkey tls-auth shared.key
+     $ openvpn --genkey tls-crypt-v2-server v2crypt-server.key
+     $ openvpn --tls-crypt-v2 v2crypt-server.key --genkey tls-crypt-v2-client v2crypt-client-1.key
+
+  * Generating *Shared Secret Keys*
+    Generate a shared secret, for use with the ``--secret``, ``--tls-auth``
+    or ``--tls-crypt`` options.
+
+    Syntax:
+    ::
+
+       $ openvpn --genkey secret|tls-crypt|tls-auth keyfile
+
+    The key is saved in ``keyfile``. All three variants (``--secret``,
+    ``tls-crypt`` and ``tls-auth``) generate the same type of key. The
+    aliases are added for convenience.
+
+    If using this for ``--secret``, this file must be shared with the peer
+    over a pre-existing secure channel such as ``scp``\(1).
+
+  * Generating *TLS Crypt v2 Server key*
+    Generate a ``--tls-crypt-v2`` key to be used by an OpenVPN server.
+    The key is stored in ``keyfile``.
+
+    Syntax:
+    ::
+
+       --genkey tls-crypt-v2-server keyfile
+
+  * Generating *TLS Crypt v2 Client key*
+    Generate a --tls-crypt-v2 key to be used by OpenVPN clients.  The
+    key is stored in ``keyfile``.
+
+    Syntax
+    ::
+
+       --genkey tls-crypt-v2-client keyfile [metadata]
+
+    If supplied, include the supplied ``metadata`` in the wrapped client
+    key. This metadata must be supplied in base64-encoded form. The
+    metadata must be at most 735 bytes long (980 bytes in base64).
+
+    If no metadata is supplied, OpenVPN will use a 64-bit unix timestamp
+    representing the current time in UTC, encoded in network order, as
+    metadata for the generated key.
+
+    A tls-crypt-v2 client key is wrapped using a server key. To generate a
+    client key, the user must therefore supply the server key using the
+    ``--tls-crypt-v2`` option.
+
+    Servers can use ``--tls-crypt-v2-verify`` to specify a metadata
+    verification command.
+
+  * Generate *Authentication Token key*
+    Generate a new secret that can be used with **--auth-gen-token-secret**
+
+    Syntax:
+    ::
+
+       --genkey auth-token [keyfile]
+
+    *Note:*
+       This file should be kept secret to the server as anyone that has
+       access to this file will be able to generate auth tokens that the
+       OpenVPN server will accept as valid.
+
+.. include:: renegotiation.rst
+.. include:: tls-options.rst
+.. include:: pkcs11-options.rst
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