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annotate doc/libervia-cli/encryption.rst @ 3851:ef824b1091f3

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component AP gateway: get items when not found in cache in `apGetLocalObject`: rel 370
author Goffi <goffi@goffi.org>
date Thu, 14 Jul 2022 12:55:30 +0200
parents 267e4987b58b
children
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1 ========================================
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2 encryption: encryption sessions handling
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3 ========================================
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4
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5 Libervia being an XMPP client does encryption by default between client and server. In
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6 addition, Libervia is also capable of doing end-to-end (e2e) encryption, meaning that the
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7 payload of messages are encrypted to be hidden from the servers (and their
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8 administrators). The ``encryption`` commands are here to handle those e2e encryption
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9 sessions and algorithms.
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10
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11 .. note::
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12
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13 For the moment, only one 2 one chat messages can be e2e encrypted
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14
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15 algorithms
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16 ==========
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17
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18 Display e2e encryption algorithms available in this instance of Libervia.
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19
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20 example
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21 -------
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22
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23 Show available e2e algorithms::
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24
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25 $ li encryption algorithms
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26
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27 get
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28 ===
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29
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30 Display which encryption session is currently active with the given entity.
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31
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32 The only required argument is the JID of the entity.
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33
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34 If not e2e encryption session exist, a message will be displayed and li will exit with a
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35 non zero code: this means that the messages are in clear in the XMPP servers, but normal
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36 XMPP encryption is not affected (message should still be encrypted between client and
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37 server and between servers).
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38
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39 If an e2e encryption session exist, you'll see the algorithm name and its namespace. In
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40 case of e2e encryption which only works from device to device (e.g. it's the case with
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41 ``OTR`` which doesn't support multiple devices), you'll also see the resources of the
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42 devices where the encryption is active in ``directed_devices``
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43
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44 example
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45 -------
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46
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47 Check if session is encrypted with Louise::
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48
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49 $ li encryption get louise@example.org
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50
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51 start
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52 =====
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53
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54 Start e2e session with an entity.
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55
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56 You need to specify the JID of the entity you want to start a session with as a positional
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57 argument.
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58
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59 By default, Libervia will select itself the algorithm to use among those available, but you can
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60 specify one using either its name with ``-n NAME, --name NAME`` or its namespace using
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61 ``-N NAMESPACE, --namespace``. ``NAME`` is the short name of the algorithm, e.g. ``omemo``
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62 while the namespace is the longer (e.g. ``urn:xmpp:otr:0``).
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63
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64 If an encryption session is started but one with an other algorithm was already there, the
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65 original session will be stopped and replaced by one with the new requested algorithm. You
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66 can change this behaviour by using ``--encrypt-noreplace``: in this case the command will
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67 fail in case of conflict (e2e encryption is requested with a new algorithm while an e2e
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68 encryption session was already started with an other algorithm), and return a non-zero
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69 code. If an e2e encryption session was already started with the requested algorithm, the
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70 command will succeed in all cases and nothing will be changed.
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71
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72 examples
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73 --------
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74
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75 Start e2e encryption with Pierre, using the algorithm selected by Libervia::
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76
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77 $ li encryption start louise@example.net
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78
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79 Start an OMEMO session with Louise::
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80
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81 $ li encryption start -n omemo louise@example.org
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82
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83 stop
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84 ====
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85
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86 Terminate an e2e session with given entity. The entity must be specified as positional
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87 argument.
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88
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89 After this command is run, the messages with specified entity will not be e2e encrypted
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90 anymore (but this won't affect encryption between Libervia and XMPP server and between XMPP
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91 servers).
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92
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93 example
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94 -------
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95
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96 Stop the e2e encryption session with Pierre::
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97
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98 $ li encryption stop pierre@example.net
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99
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100 trust ui
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101 ========
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102
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103 Run the user interface to handle trust with given entity and given algorithm. The user
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104 interface depends on the algorithm used, but it generally shows you the fingerprints
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105 associated with your contact or contact devices, and asks you if you trust them or not.
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106
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107 The only mandatory argument is the jid of your contact.
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108
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109 By default the currently active encryption session algorithm is used, but you may manage
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110 trust for another algorithm by using ``-n NAME, --name NAME`` or ``-N NAMESPACE,
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111 --namespace NAMESPACE``.
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112
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113 .. note::
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114
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115 Trusting a contact or a device means that you certify that this contact or device is
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116 the one you want to talk too. You should not trust a device if you have not verified by
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117 an external channel (i.e. not XMPP) the fingerprint. The best way is to verify the
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118 fingerprint physically if possible (i.e. in front of your contact, not with computer
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119 networks in the middle).
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120
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121 example
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122 -------
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123
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124 Manage ``OMEMO`` trust with Louise devices::
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125
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126 $ li encryption trust ui -n omemo louise@example.org