paul@11 | 1 | Introduction
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paul@11 | 2 | ------------
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paul@11 | 3 |
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paul@11 | 4 | MoinMessage provides a library for creating, signing, encrypting, decrypting,
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paul@12 | 5 | and verifying PGP/GPG content in Python along with mechanisms for updating
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paul@51 | 6 | MoinMoin wiki instances with such content such that contributors can be
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paul@11 | 7 | identified from their PGP signatures and such details used to authenticate
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paul@63 | 8 | their contributions. It also permits PGP/GPG content to be stored in dedicated
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paul@63 | 9 | message stores when received, enabling further processing of received content
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paul@63 | 10 | and other means of perusal of such content.
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paul@11 | 11 |
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paul@11 | 12 | Configuring GPG for a Wiki
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paul@11 | 13 | --------------------------
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paul@11 | 14 |
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paul@37 | 15 | Initialise a homedir for GPG and configure it using filesystem ACL (access
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paul@37 | 16 | control list) properties:
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paul@11 | 17 |
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paul@12 | 18 | ./scripts/init_wiki_keyring.sh WIKI WEBUSER
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paul@12 | 19 |
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paul@51 | 20 | Here, WIKI should be replaced by the top-level wiki instance directory, and
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paul@12 | 21 | WEBUSER should be the name of the user under which the Web server operates.
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paul@12 | 22 |
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paul@12 | 23 | Note that this script may need re-running after the homedir has been changed
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paul@12 | 24 | by gpg operations as gpg likes to remove permissions from various files.
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paul@11 | 25 |
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paul@66 | 26 | Configuring GPG: Signing Keys
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paul@66 | 27 | -----------------------------
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paul@66 | 28 |
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paul@67 | 29 | For a wiki to be able to receive content, signing keys must be made available
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paul@67 | 30 | within the wiki's GPG homedir so that incoming messages can have their senders
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paul@67 | 31 | verified.
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paul@11 | 32 |
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paul@67 | 33 | Consider the need to send content to a wiki yourself. To see the keys
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paul@67 | 34 | available to you in your own environment:
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paul@11 | 35 |
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paul@11 | 36 | gpg --list-keys --with-fingerprint
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paul@11 | 37 |
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paul@51 | 38 | The full fingerprints are used when defining a user mapping in the wiki, and
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paul@11 | 39 | the --with-fingerprint option is used to show them. Otherwise, only the last
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paul@11 | 40 | eight characters of the fingerprints are shown.
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paul@11 | 41 |
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paul@11 | 42 | Export the public key used when signing messages from your own environment:
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paul@11 | 43 |
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paul@11 | 44 | gpg --armor --output 1C1AAF83.asc --export 1C1AAF83
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paul@11 | 45 |
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paul@51 | 46 | Import the key into the wiki's GPG homedir:
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paul@11 | 47 |
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paul@65 | 48 | gpg --homedir WIKI/gnupg --import 1C1AAF83.asc
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paul@11 | 49 |
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paul@67 | 50 | Signing keys can also be used in the authoring of messages within a wiki, and
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paul@67 | 51 | this is discussed in "The Username-to-Signing-Key Mapping" section below.
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paul@67 | 52 |
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paul@66 | 53 | Configuring GPG: Encryption Keys
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paul@66 | 54 | --------------------------------
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paul@66 | 55 |
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paul@66 | 56 | For the wiki to receive and decrypt encrypted data, a key for the wiki must be
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paul@66 | 57 | created:
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paul@11 | 58 |
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paul@65 | 59 | gpg --homedir WIKI/gnupg --gen-key
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paul@11 | 60 |
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paul@51 | 61 | For the wiki environment to be able to use the key, password access must be
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paul@12 | 62 | disabled. This can be done by either not specifying a password or by removing
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paul@59 | 63 | it later using the --edit-key option:
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paul@59 | 64 |
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paul@65 | 65 | gpg --homedir WIKI/gnupg --edit-key 0891463A
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paul@59 | 66 | passwd
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paul@12 | 67 |
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paul@51 | 68 | Export the wiki's key for encrypting messages sent to the wiki:
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paul@11 | 69 |
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paul@65 | 70 | gpg --homedir WIKI/gnupg --armor --output 0891463A.asc --export 0891463A
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paul@11 | 71 |
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paul@11 | 72 | This exported key can now be imported into your own environment:
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paul@11 | 73 |
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paul@11 | 74 | gpg --import 0891463A.asc
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paul@11 | 75 |
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paul@66 | 76 | This key can also be used to sign relayed messages, and this is described in
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paul@67 | 77 | more detail in "The Username-to-Signing-Key Mapping" section below.
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paul@66 | 78 |
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paul@11 | 79 | Configuring the Wiki
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paul@11 | 80 | --------------------
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paul@11 | 81 |
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paul@51 | 82 | In the wiki configuration, define the following settings:
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paul@11 | 83 |
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paul@11 | 84 | moinmessage_gpg_homedir
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paul@11 | 85 | This sets the path to the homedir initialised above.
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paul@11 | 86 |
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paul@11 | 87 | moinmessage_gpg_users_page (optional, default is MoinMessageUserDict)
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paul@11 | 88 | This provides a mapping from key fingerprints to Moin usernames.
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paul@11 | 89 |
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paul@12 | 90 | moinmessage_gpg_signing_users_page (optional, default is MoinMessageSigningUserDict)
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paul@12 | 91 | This provides a mapping from Moin usernames to key fingerprints.
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paul@12 | 92 |
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paul@65 | 93 | moinmessage_gpg_relaying_user (optional)
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paul@65 | 94 | This specifies the username of a special user who will sign relayed
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paul@65 | 95 | messages. Partner wikis will need to record the details of this user in
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paul@65 | 96 | their fingerprint-to-user mapping (see moinmessage_gpg_users_page) to be
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paul@65 | 97 | able to receive messages from this wiki.
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paul@65 | 98 |
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paul@68 | 99 | moinmessage_gpg_relays_page (optional, default is MoinMessageRelayDict)
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paul@68 | 100 | Where message relaying is specified for a recipient, the relay name will be
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paul@68 | 101 | looked up in the dictionary provided by this page.
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paul@68 | 102 |
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paul@12 | 103 | moinmessage_gpg_recipients_page (optional, default is MoinMessageRecipientsDict)
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paul@12 | 104 | This provides a mapping from recipients to remote URLs and key fingerprints.
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paul@37 | 105 | Each user can define the named page as a subpage of their own home page.
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paul@37 | 106 | If no such personal mapping exists, a common mapping exists relative to the
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paul@37 | 107 | site root.
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paul@12 | 108 |
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paul@20 | 109 | moinmessage_reject_messages_without_dates (optional, default is True)
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paul@51 | 110 | This causes messages sent to a wiki using the PostMessage action to be
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paul@20 | 111 | rejected if date information is missing.
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paul@20 | 112 |
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paul@40 | 113 | moinmessage_static_files (optional, may refer to the built-in htdocs directory)
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paul@40 | 114 | This explicitly defines the path to static resources used by Moin, enabling
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paul@40 | 115 | such resources to be attached to messages. When set, the path must refer to
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paul@40 | 116 | the htdocs directory (possibly renamed) containing the different theme
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paul@65 | 117 | resource directories, together with the robots.txt and favicon.ico files.
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paul@40 | 118 |
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paul@38 | 119 | For signature verification to function, the following needs to be added:
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paul@38 | 120 |
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paul@38 | 121 | from MoinMoin.auth.pgp import PGPAuth
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paul@38 | 122 |
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paul@38 | 123 | This should import an authentication handler installed when the MoinMessage
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paul@38 | 124 | software is installed as an extension package.
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paul@38 | 125 |
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paul@38 | 126 | Within the configuration class itself, the auth setting needs to be updated to
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paul@38 | 127 | include PGPAuth in the list of registered handlers. For example:
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paul@38 | 128 |
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paul@38 | 129 | auth = [MoinAuth(), PGPAuth()]
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paul@38 | 130 |
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paul@38 | 131 | This would permit the traditional Moin authentication and add signature-based
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paul@51 | 132 | authentication so that messages can be accepted by the wiki.
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paul@38 | 133 |
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paul@12 | 134 | Fingerprints and Keys
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paul@12 | 135 | ---------------------
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paul@12 | 136 |
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paul@12 | 137 | All fingerprints mentioned in the various configuration pages must exclude
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paul@12 | 138 | space characters - that is, the letters and digits must appear together in a
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paul@51 | 139 | continuous block of text - and refer to keys available in the wiki homedir.
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paul@12 | 140 |
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paul@11 | 141 | The Fingerprint-to-Username Mapping
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paul@11 | 142 | -----------------------------------
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paul@11 | 143 |
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paul@12 | 144 | The mapping from fingerprints to usernames typically defined by the
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paul@12 | 145 | MoinMessageUserDict page is a WikiDict having the following general format:
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paul@11 | 146 |
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paul@11 | 147 | fingerprint:: username
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paul@11 | 148 |
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paul@12 | 149 | Each fingerprint corresponds to a key used by a person wanting to send
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paul@51 | 150 | messages to the wiki to sign such messages.
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paul@11 | 151 |
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paul@51 | 152 | Each username must correspond to a registered user in the wiki.
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paul@11 | 153 |
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paul@65 | 154 | If a wiki is to perform message relaying, receiving messages from partner
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paul@65 | 155 | wikis and sending them on, a user is required for this purpose. You could
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paul@65 | 156 | create such a user as follows:
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paul@65 | 157 |
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paul@66 | 158 | moin --config-dir=WIKI account create --name=RelayingUser --email=messagerelay
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paul@65 | 159 |
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paul@65 | 160 | (You may need to run this command as the Web server user to be able to change
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paul@65 | 161 | the wiki installation, as well as indicating the full path to the moin program
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paul@65 | 162 | either as the program name or by setting the PATH.)
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paul@65 | 163 |
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paul@65 | 164 | After doing this, you could define an entry for the relaying user as follows:
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paul@65 | 165 |
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paul@66 | 166 | fingerprint:: RelayingUser
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paul@65 | 167 |
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paul@65 | 168 | Here, "fingerprint" should be substituted for a key fingerprint used by a
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paul@65 | 169 | partner wiki to sign messages that it then sends to this wiki. See the next
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paul@65 | 170 | section for more information on signing keys and identities.
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paul@65 | 171 |
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paul@65 | 172 | It may very well be the case that more than one partner wiki will be sending
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paul@65 | 173 | messages to this wiki: the signing key fingerprint of each partner wiki can be
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paul@65 | 174 | added to this mapping and specify the same relaying user; there is no
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paul@65 | 175 | restriction on each fingerprint needing to map to a different user.
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paul@65 | 176 |
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paul@67 | 177 | The Username-to-Signing-Key Mapping
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paul@12 | 178 | -----------------------------------
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paul@12 | 179 |
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paul@12 | 180 | The mapping from usernames to fingerprints typically defined by the
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paul@12 | 181 | MoinMessageSigningUserDict page is a WikiDict having the following general
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paul@12 | 182 | format:
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paul@12 | 183 |
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paul@12 | 184 | username:: fingerprint
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paul@12 | 185 |
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paul@51 | 186 | Each fingerprint corresponds to a key available in the wiki's GPG homedir
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paul@12 | 187 | generated for the purpose of signing the specified user's messages. Such a key
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paul@51 | 188 | is not the same as one used by a person to send messages to the wiki since
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paul@51 | 189 | only the public key is available to the wiki when verifying such messages,
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paul@51 | 190 | whereas the signing of messages requires access to a private key. Thus, the
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paul@51 | 191 | signing process employs a special private key known to the wiki for a user.
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paul@12 | 192 |
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paul@67 | 193 | To create such a key, the following command can be used:
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paul@67 | 194 |
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paul@67 | 195 | gpg --homedir WIKI/gnupg --gen-key
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paul@67 | 196 |
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paul@67 | 197 | This is just like creating a key for the wiki itself (see "Configuring GPG for
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paul@67 | 198 | a Wiki" above), but you will label the key appropriately for the user and
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paul@67 | 199 | associate the key with the user in the mapping described above. Remember to
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paul@67 | 200 | remove the passphrase so that the wiki can access the key.
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paul@67 | 201 |
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paul@65 | 202 | If a wiki is to perform message relaying, the special relaying user must be
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paul@65 | 203 | defined in this mapping together with an appropriate key fingerprint. You can
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paul@65 | 204 | use the key generated during the wiki's configuration (see "Configuring GPG
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paul@65 | 205 | for a Wiki" above) for this purpose. This fingerprint can then be used by
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paul@65 | 206 | partner wikis in their fingerprint-to-user mapping in order to verify incoming
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paul@65 | 207 | messages and to process them as relayed messages.
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paul@65 | 208 |
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paul@12 | 209 | The Recipients Mapping
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paul@12 | 210 | ----------------------
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paul@12 | 211 |
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paul@12 | 212 | The mapping from recipients to remote URLs and fingerprints typically defined
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paul@12 | 213 | by the MoinMessageRecipientsDict page is a WikiDict having the following
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paul@12 | 214 | general format:
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paul@12 | 215 |
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paul@43 | 216 | recipient:: type location [ fingerprint ]
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paul@27 | 217 |
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paul@43 | 218 | Where the type is "page", the accompanying location must be a page name
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paul@28 | 219 | indicating a page that provides a message store that will accept messages.
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paul@63 | 220 | The affected page resides on the same wiki and is thus a bare page name, not
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paul@63 | 221 | the URL of a page on the same or another wiki.
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paul@12 | 222 |
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paul@43 | 223 | Where the type is "url", the accompanying location must be a URL that must
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paul@43 | 224 | itself refer to a resource that can accept MoinMessage content.
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paul@12 | 225 |
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paul@68 | 226 | Where the type is "relay", the accompanying location is an identifier that
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paul@68 | 227 | must be defined in the relays mapping (see below) and yield a URL that can
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paul@68 | 228 | accept MoinMessage content.
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paul@68 | 229 |
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paul@68 | 230 | Where a type of "url" or "relay" has been given, a fingerprint must accompany
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paul@68 | 231 | this information in order to encrypt messages sent to the specified resource.
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paul@27 | 232 |
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paul@51 | 233 | Each fingerprint corresponds to a key used by the wiki to encrypt messages and
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paul@27 | 234 | by the remote site (as identified by the URL) to decrypt messages.
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paul@12 | 235 |
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paul@55 | 236 | Each wiki user can have their own recipients mapping by making a page, called
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paul@55 | 237 | MoinMessageRecipientsDict unless overridden by the configuration, as a subpage
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paul@55 | 238 | of their own home page.
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paul@55 | 239 |
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paul@68 | 240 | The Relays Mapping
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paul@68 | 241 | ------------------
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paul@68 | 242 |
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paul@68 | 243 | The mapping from relay identifiers to remote URLs defined by the
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paul@68 | 244 | MoinMessageRelayDict page is a WikiDict having the following general format:
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paul@68 | 245 |
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paul@68 | 246 | relay:: url
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paul@68 | 247 |
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paul@68 | 248 | The URL must be able to accept MoinMessage content, and it will typically be
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paul@68 | 249 | configured so that the user or entity accepting relayed content on the remote
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paul@68 | 250 | site can store such content for later propagation or retrieval.
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paul@68 | 251 |
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paul@11 | 252 | Quick Start: Signing, Encrypting and Sending Messages
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paul@11 | 253 | -----------------------------------------------------
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paul@11 | 254 |
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paul@11 | 255 | To send a message signed and encrypted to a resource on localhost:
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paul@11 | 256 |
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paul@12 | 257 | python tests/test_send.py 1C1AAF83 0891463A http://localhost/wiki/ShareTest \
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paul@51 | 258 | collection update 'An update to the wiki.' 'Another update.'
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paul@11 | 259 |
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paul@11 | 260 | Here, the first identifier is a reference to the signing key (over which you
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paul@11 | 261 | have complete control), and the second identifier is a reference to the
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paul@51 | 262 | encryption key (which is a public key published for the wiki).
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paul@11 | 263 |
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paul@11 | 264 | This needs password protection to be removed from the secret key in the Web
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paul@12 | 265 | server environment. It also uses a modified trust model when invoking gpg in
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paul@12 | 266 | order to avoid complaints about the identity of the sender during encryption.
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paul@11 | 267 |
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paul@45 | 268 | To sign the encrypted message for forwarding, the above command is modified:
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paul@45 | 269 |
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paul@45 | 270 | python tests/test_send.py 1C1AAF83 0891463A --forward 1C1AAF83 \
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paul@45 | 271 | http://localhost/wiki/ShareTest \
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paul@51 | 272 | collection update 'An update to the wiki.' 'Another update.'
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paul@45 | 273 |
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paul@11 | 274 | Below, the mechanisms employed are illustrated through the use of the other
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paul@11 | 275 | test programs.
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paul@11 | 276 |
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paul@11 | 277 | Signing
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paul@11 | 278 | -------
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paul@11 | 279 |
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paul@11 | 280 | Prepare a message signed with a "detached signature" (note that this does not
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paul@11 | 281 | seem to be what gpg calls a detached signature with the --detach-sig option):
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paul@11 | 282 |
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paul@51 | 283 | python tests/test_message.py collection update 'An update to the wiki.' \
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paul@16 | 284 | 'Another update.' \
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paul@11 | 285 | | python tests/test_sign.py 1C1AAF83
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paul@11 | 286 |
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paul@11 | 287 | The complicated recipe based on the individual operations is as follows:
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paul@11 | 288 |
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paul@51 | 289 | python tests/test_message.py collection update 'An update to the wiki.' \
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paul@16 | 290 | 'Another update.' \
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paul@11 | 291 | > test.txt \
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paul@11 | 292 | && cat test.txt \
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paul@11 | 293 | | gpg --armor -u 1C1AAF83 --detach-sig \
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paul@11 | 294 | | python tests/test_sign_wrap.py test.txt
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paul@11 | 295 |
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paul@11 | 296 | Encryption
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paul@11 | 297 | ----------
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paul@11 | 298 |
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paul@11 | 299 | Prepare a message with an encrypted payload using the above key:
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paul@11 | 300 |
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paul@51 | 301 | python tests/test_message.py collection update 'An update to the wiki.' \
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paul@16 | 302 | 'Another update.' \
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paul@11 | 303 | | python tests/test_encrypt.py 0891463A
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paul@11 | 304 |
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paul@11 | 305 | The complicated recipe based on the individual operations is as follows:
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paul@11 | 306 |
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paul@51 | 307 | python tests/test_message.py collection update 'An update to the wiki.' \
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paul@16 | 308 | 'Another update.' \
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paul@11 | 309 | > test.txt \
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paul@11 | 310 | && cat test.txt \
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paul@11 | 311 | | gpg --armor -r 0891463A --encrypt --trust-model always \
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paul@11 | 312 | | python tests/test_encrypt_wrap.py
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paul@11 | 313 |
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paul@11 | 314 | Note that "--trust-model always" is used only to avoid prompting issues.
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paul@11 | 315 |
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paul@11 | 316 | Signing and Encrypting
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paul@11 | 317 | ----------------------
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paul@11 | 318 |
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paul@12 | 319 | Sign and encrypt a message:
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paul@11 | 320 |
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paul@51 | 321 | python tests/test_message.py collection update 'An update to the wiki.' \
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paul@16 | 322 | 'Another update.' \
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paul@11 | 323 | | python tests/test_sign.py 1C1AAF83 \
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paul@11 | 324 | | python tests/test_encrypt.py 0891463A
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paul@11 | 325 |
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paul@11 | 326 | The complicated recipe based on the individual operations is as follows:
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paul@11 | 327 |
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paul@51 | 328 | python tests/test_message.py collection update 'An update to the wiki.' \
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paul@16 | 329 | 'Another update.' \
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paul@11 | 330 | > test.txt \
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paul@11 | 331 | && cat test.txt \
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paul@11 | 332 | | gpg --armor -u 1C1AAF83 --detach-sig \
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paul@11 | 333 | | python tests/test_sign_wrap.py test.txt \
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paul@11 | 334 | | gpg --armor -r 0891463A --encrypt --trust-model always \
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paul@11 | 335 | | python tests/test_encrypt_wrap.py
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paul@11 | 336 |
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paul@45 | 337 | Signing and Encrypting then Signing
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paul@45 | 338 | -----------------------------------
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paul@45 | 339 |
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paul@45 | 340 | Where a message is to be forwarded and not decrypted, it will be signed by the
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paul@45 | 341 | author, encrypted, but then signed by the forwarder (perhaps initially the
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paul@45 | 342 | author):
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paul@45 | 343 |
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paul@51 | 344 | python tests/test_message.py collection update 'An update to the wiki.' \
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paul@45 | 345 | 'Another update.' \
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paul@45 | 346 | | python tests/test_sign.py 1C1AAF83 \
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paul@45 | 347 | | python tests/test_encrypt.py 0891463A \
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paul@45 | 348 | | python tests/test_sign.py 1C1AAF83
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paul@45 | 349 |
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paul@45 | 350 | The complicated recipe based on the individual operations is as follows:
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paul@45 | 351 |
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paul@51 | 352 | python tests/test_message.py collection update 'An update to the wiki.' \
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paul@45 | 353 | 'Another update.' \
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paul@45 | 354 | > test.txt \
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paul@45 | 355 | && cat test.txt \
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paul@45 | 356 | | gpg --armor -u 1C1AAF83 --detach-sig \
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paul@45 | 357 | | python tests/test_sign_wrap.py test.txt \
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paul@45 | 358 | | gpg --armor -r 0891463A --encrypt --trust-model always \
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paul@45 | 359 | | python tests/test_encrypt_wrap.py \
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paul@45 | 360 | > test2.txt \
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paul@45 | 361 | && cat test2.txt \
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paul@45 | 362 | | gpg --armor -u 1C1AAF83 --detach-sig \
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paul@45 | 363 | | python tests/test_sign_wrap.py test2.txt
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paul@45 | 364 |
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paul@11 | 365 | Posting a Message
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paul@11 | 366 | -----------------
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paul@11 | 367 |
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paul@11 | 368 | To post a signed and/or encrypted message, output from the above activities
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paul@11 | 369 | can be piped into the following command:
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paul@11 | 370 |
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paul@12 | 371 | python tests/test_post.py http://localhost/wiki/ShareTest
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paul@11 | 372 |
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paul@11 | 373 | Here, the resource "/wiki/ShareTest" on localhost is presented with the
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paul@11 | 374 | message.
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paul@16 | 375 |
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paul@32 | 376 | Fetching Messages
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paul@32 | 377 | -----------------
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paul@32 | 378 |
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paul@32 | 379 | To fetch messages from a message store associated with a page, the following
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paul@32 | 380 | command can be used:
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paul@32 | 381 |
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paul@32 | 382 | python tests/test_fetch.py 1C1AAF83 0891463A http://localhost/wiki/ShareTest \
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paul@32 | 383 | RETR
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paul@32 | 384 |
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paul@32 | 385 | This should retrieve all messages from the store associated with the
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paul@32 | 386 | "/wiki/ShareTest" resource on localhost.
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paul@32 | 387 |
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paul@16 | 388 | The Message Format
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paul@16 | 389 | ------------------
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paul@16 | 390 |
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paul@16 | 391 | Messages are MIME-encoded and consist of one or more update fragments. Where
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paul@16 | 392 | the "Update-Type" header is present and set to a value of "collection", a
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paul@16 | 393 | multipart message describes as many updates as there are parts. Otherwise,
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paul@16 | 394 | only a single update is described by the message.
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paul@16 | 395 |
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paul@16 | 396 | For each update, the "Update-Action" header indicates the action to be taken
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paul@16 | 397 | with the update content. Where it is absent, the content is inserted into the
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paul@51 | 398 | wiki page specified in the request; where it is present and set to "replace",
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paul@51 | 399 | the content replaces all content on the wiki page; where it is set to "store",
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paul@51 | 400 | the content is stored in a message store associated with the wiki page.
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paul@16 | 401 |
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paul@16 | 402 | Each update may describe multiple representations of some content by employing
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paul@44 | 403 | a multipart/alternative section containing parts for each of the
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paul@44 | 404 | representations. Alternatively, a single message part may describe a single
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paul@44 | 405 | representation.
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paul@44 | 406 |
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paul@44 | 407 | HTTP Methods
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paul@44 | 408 | ------------
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paul@44 | 409 |
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paul@44 | 410 | Since MoinMoin seems to reserve POST methods for request/entity bodies that
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paul@44 | 411 | contain HTML form data, it is necessary to use alternative methods to post
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paul@44 | 412 | messages to a site served by MoinMoin and to fetch messages from such a site.
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paul@57 | 413 | Consequently, MoinMessage uses PUT to post and fetch messages. Unfortunately,
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paul@57 | 414 | MoinMoin 1.9 prevents the use of GET with request/entity bodies, and so the
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paul@57 | 415 | natural usage of GET to fetch messages cannot be employed.
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paul@54 | 416 |
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paul@54 | 417 | Contact, Copyright and Licence Information
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paul@54 | 418 | ------------------------------------------
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paul@54 | 419 |
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paul@54 | 420 | See the following Web page for more information about this work:
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paul@54 | 421 |
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paul@54 | 422 | http://moinmo.in/ActionMarket/MoinMessage
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paul@54 | 423 |
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paul@54 | 424 | The author can be contacted at the following e-mail address:
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paul@54 | 425 |
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paul@54 | 426 | paul@boddie.org.uk
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paul@54 | 427 |
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paul@54 | 428 | Copyright and licence information can be found in the docs directory - see
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paul@54 | 429 | docs/COPYING.txt and docs/LICENCE.txt for more information.
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paul@54 | 430 |
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paul@54 | 431 | Dependencies
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paul@54 | 432 | ------------
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paul@54 | 433 |
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paul@54 | 434 | MoinMessage has the following basic dependencies:
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paul@54 | 435 |
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paul@54 | 436 | Packages Release Information
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paul@54 | 437 | -------- -------------------
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paul@54 | 438 |
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paul@54 | 439 | MoinSupport Tested with 0.4
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paul@54 | 440 | Source: http://hgweb.boddie.org.uk/MoinSupport
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