[Kde-pim] Review Request: Add SSL protocol version fallback for IMAP servers not supporting it correctly

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This review has been submitted with commit d8eeb4cb0c0c7aa3600216b9409750f7adaa3131 by Stefan Brüns to branch KDE/4.9.

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On Nov. 2, 2012, 2:31 p.m., Stefan Brüns wrote:
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> http://git.reviewboard.kde.org/r/107099/
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> (Updated Nov. 2, 2012, 2:31 p.m.)
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> 
> Review request for KDEPIM-Libraries, Kevin Ottens, Andreas Hartmetz, Dawit Alemayehu, and Thiago Macieira.
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> Description
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> Normally any server greeted with an TLS1.2 (protocol version 03.03) ClientHello should answer with an ServerHello indicating the highest common version. Unfortunately there are some servers out there not doing this, exiting with an fatal TLS alert.
> In this case, try again with TLS1.0, SSLv3 and SSLv2.
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> This happens as openSSL 1.0.1 supports TLS1.1/1.2, which will be used if KTcpSocket::AnySslVersion is used. openSSL <= 1.0.0 only supports TLS1.0, so this not an issue then.
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> This patch only adds this behaviour to the "normal" imap ressource, but something similar is also needed in the server setup dialog.
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> Something similar is done in the TCP ioslave, see https://git.reviewboard.kde.org/r/103610/
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> This addresses bugs 306964 and 308854.
>     http://bugs.kde.org/show_bug.cgi?id=306964
>     http://bugs.kde.org/show_bug.cgi?id=308854
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> Diffs
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>   kimap/sessionthread.cpp a1bd0502a3f488fbe7b7ae8013544a00012a0ea3 
>   kimap/sessionthread_p.h 672c418733e12ba39b81ee0193d0dd03d395ce0c 
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> Diff: http://git.reviewboard.kde.org/r/107099/diff/
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> Testing
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> Thanks,
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> Stefan Brüns
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>

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