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Merge pull request #241 from linkmauve/eme
Explicit Message Encryption ProtoXEP: Add a 0.0.2 version
This commit is contained in:
Florian Schmaus
GitHub
commit
557c240e56
@ -29,6 +29,20 @@
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<email>linkmauve@linkmauve.fr</email>
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<jid>linkmauve@linkmauve.fr</jid>
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</author>
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<revision>
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<version>0.0.2</version>
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<date>2016-08-28</date>
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<initials>egp</initials>
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<remark><ul>
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<li>Made the 'name' attribute optional for existing mechanisms.</li>
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<li>Added a remark about the possibility to hide encrypted messages
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following user input.</li>
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<li>Made explicit that this protocol affects any encryption mechanism,
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present or future, not only those listed here.</li>
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<li>Display the namespace of the encryption mechanism in the default
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messages.</li>
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</ul></remark>
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</revision>
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<revision>
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<version>0.0.1</version>
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<date>2016-08-14</date>
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@ -77,7 +91,6 @@
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id='secret1'>
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<body>?OTR?v23?...</body>
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<encryption xmlns='urn:xmpp:eme:0'
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name='OTR'
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namespace='urn:xmpp:otr:0'/>
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</message>
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]]></example>
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@ -86,7 +99,8 @@
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display that the message was encrypted but that it is not able to decrypt
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it instead of displaying the body, for example:</p>
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<div class='example'>
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<p>🔒 This message was encrypted with OTR and could not be decrypted.</p>
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<p>🔒 This message was encrypted with OTR (urn:xmpp:otr:0) and could not be
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decrypted.</p>
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</div>
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<p>Juliet may then communicate to Romeo that she was unable to receive his
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@ -104,7 +118,6 @@
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</openpgp>
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<body>This message is encrypted with OpenPGP for XMPP.</body>
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<encryption xmlns='urn:xmpp:eme:0'
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name='OpenPGP for XMPP'
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namespace='urn:xmpp:openpgp:0'/>
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</message>
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]]></example>
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@ -112,17 +125,19 @@
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<p>Upon receiving this message, Juliet’s current client prompts her to enable
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a plugin, or even do it on its own, possible representations include:</p>
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<div class='example'>
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<p>🔒 This message was encrypted with OpenPGP for XMPP, <link url="#">click
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here</link> to enable this plugin.</p>
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</div>
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<div class='example'>
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<p>🔒 This message was encrypted with OpenPGP for XMPP, downloading and
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installing an appropriate plugin, your message will be displayed
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shortly.</p>
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<p>🔒 This message was encrypted with OpenPGP for XMPP
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(urn:xmpp:openpgp:0), <link url="#">click here</link> to enable this
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plugin.</p>
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</div>
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</section2>
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<section2 topic='Protocols Supported' anchor='protocols'>
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<p>Any encryption mechanism using message as a transport is a candidate, and
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MAY have a 'name' attribute to help the receiving client display it to the
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user, in case this client doesn’t understand its namespace yet. A 'name'
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attribute SHOULD NOT be included for the protocols listed herein, and
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SHOULD be ignored by a receiving client:</p>
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<table>
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<tr>
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<th>Name</th>
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@ -156,7 +171,7 @@
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<p>If an entity supports the Encrypted Message Extension protocol, it MUST
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report that by including a &xep0030; feature of "urn:xmpp:eme:0" in
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response to disco#info requests:</p>
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<example caption='Client queries for entity features'><![CDATA[
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<example caption='Client queries for entity features'><![CDATA[
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<iq type='get'
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id='disco1'
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to='juliet@capulet.lit/balcony'
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@ -165,7 +180,7 @@
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</iq>
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]]></example>
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<example caption='Entity responds with features'><![CDATA[
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<example caption='Entity responds with features'><![CDATA[
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<iq type='result'
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id='disco1'
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to='romeo@montague.lit/orchard'
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@ -195,12 +210,22 @@
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recipient doesn’t advertise support for it in their disco, or isn’t
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currently connected, since the recipient may be using multiple clients with
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different capabilities.</p>
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<p>A sender entity MAY include a 'name' attribute for any encryption
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mechanism not listed in this specification, to help the receiving entity
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present it to the user, but SHOULD NOT include one for the ones listed
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here.</p>
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<p>A receiving entity MUST NOT use the 'name' attribute if it is present and
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they already have a name associated with it.</p>
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<p>A receiving entity MAY not display anything in case an encrypted message
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has been received, if the user agreed to that behaviour.</p>
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</section1>
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<section1 topic='Internationalization Considerations' anchor='i18n'>
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<p>When a message is marked with an encryption tag and can not be decrypted,
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the body can safely be ignored and a localized message displayed
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instead.</p>
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<p>If an entity includes a 'name' attribute, it should attempt to localise it
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to the best of its abilities for the receiving client.</p>
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</section1>
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<section1 topic='Security Considerations' anchor='security'>
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@ -216,7 +241,7 @@
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<section1 topic='XMPP Registrar Considerations' anchor='registrar'>
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<section2 topic='Protocol Namespaces' anchor='registrar-ns'>
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<p>This specification defines the following XML namespace:</p>
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<p>This specification defines the following XML namespace:</p>
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<ul>
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<li>'urn:xmpp:eme:0'</li>
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</ul>
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@ -241,8 +266,8 @@
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<xs:element name="encryption">
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<xs:complexType>
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<xs:attribute type="xs:string" use="required" name="name"/>
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<xs:attribute type="xs:string" use="required" name="namespace"/>
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<xs:attribute type="xs:string" use="optional" name="name"/>
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</xs:complexType>
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</xs:element>
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