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Blowfish Encryption Manual » History » Version 6

johu, 01/31/2011 09:41 PM

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h1. Blowfish Encryption
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* required version *>=0.7*
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h2. Introduction
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Blowfish can be used to encrypt messages between 2 persons in query, messages in channel and the topic. In Quassel all messages will be de-/encrypted on core. So it is *highly recommend* to *[[Client-Core_SSL_support|setup SSL]]* in case of you are not running monolithic client.
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!http://bugs.quassel-irc.org/attachments/304/core_deencryption.png!
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h2. Commands
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a) setting a key for a user or channel 
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> Usage
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<pre><code>/setkey <nick|channel> <key></code></pre>
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b) deleting a key for a user or channel
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> Usage
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<pre><code>/delkey <nick|channel></code></pre>
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h2. Build Instructions
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Blowfish support for Quassel depends on *"QCA":http://delta.affinix.com/qca/* (Qt Cryptographic Architecture) library. It is needed to compile your core/monolithic client with crypt compile option. 
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bq. _..._ -DWITH_CRYPT=ON _..._
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For detailed build instructions have at look "general build instructons":http://bugs.quassel-irc.org/projects/quassel-irc/wiki/#Specific-installation-instructions.
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h2. Troubleshooting
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* If Quassel crashes (like #1045) when tries to send a message to a <nick|channel> where a blowfish encryption key has been set with _<code>/setkey <nick|channel> <key></code>_, you have to install *"qca-ossl":http://delta.affinix.com/qca/*.