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authorErlang/OTP <[email protected]>2016-06-21 15:12:41 +0200
committerErlang/OTP <[email protected]>2016-06-21 15:12:41 +0200
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<p>This document describes the changes made to the SSL application.</p>
+<section><title>SSL 8.0</title>
+
+ <section><title>Fixed Bugs and Malfunctions</title>
+ <list>
+ <item>
+ <p>
+ Server now rejects, a not requested client cert, as an
+ incorrect handshake message and ends the connection.</p>
+ <p>
+ Own Id: OTP-13651</p>
+ </item>
+ </list>
+ </section>
+
+
+ <section><title>Improvements and New Features</title>
+ <list>
+ <item>
+ <p>
+ Remove default support for DES cipher suites</p>
+ <p>
+ *** POTENTIAL INCOMPATIBILITY ***</p>
+ <p>
+ Own Id: OTP-13195</p>
+ </item>
+ <item>
+ <p>
+ Deprecate the function <c>crypto:rand_bytes</c> and make
+ sure that <c>crypto:strong_rand_bytes</c> is used in all
+ places that are cryptographically significant.</p>
+ <p>
+ Own Id: OTP-13214</p>
+ </item>
+ <item>
+ <p>
+ Better error handling of user error during TLS upgrade.
+ ERL-69 is solved by gen_statem rewrite of ssl
+ application.</p>
+ <p>
+ Own Id: OTP-13255</p>
+ </item>
+ <item>
+ <p>
+ Provide user friendly error message when crypto rejects a
+ key</p>
+ <p>
+ Own Id: OTP-13256</p>
+ </item>
+ <item>
+ <p>
+ Add ssl:getstat/1 and ssl:getstat/2</p>
+ <p>
+ Own Id: OTP-13415</p>
+ </item>
+ <item>
+ <p>
+ TLS distribution connections now allow specifying the
+ options <c>verify_fun</c>, <c>crl_check</c> and
+ <c>crl_cache</c>. See the documentation. GitHub pull req
+ #956 contributed by Magnus Henoch.</p>
+ <p>
+ Own Id: OTP-13429 Aux Id: Pull#956 </p>
+ </item>
+ <item>
+ <p>
+ Remove confusing error message when closing a distributed
+ erlang node running over TLS</p>
+ <p>
+ Own Id: OTP-13431</p>
+ </item>
+ <item>
+ <p>
+ Remove default support for use of md5 in TLS 1.2
+ signature algorithms</p>
+ <p>
+ Own Id: OTP-13463</p>
+ </item>
+ <item>
+ <p>
+ ssl now uses gen_statem instead of gen_fsm to implement
+ the ssl connection process, this solves some timing
+ issues in addition to making the code more intuitive as
+ the behaviour can be used cleanly instead of having a lot
+ of workaround for shortcomings of the behaviour.</p>
+ <p>
+ Own Id: OTP-13464</p>
+ </item>
+ <item>
+ <p>
+ Phase out interoperability with clients that offer SSLv2.
+ By default they are no longer supported, but an option to
+ provide interoperability is offered.</p>
+ <p>
+ *** POTENTIAL INCOMPATIBILITY ***</p>
+ <p>
+ Own Id: OTP-13465</p>
+ </item>
+ <item>
+ <p>
+ OpenSSL has functions to generate short (eight hex
+ digits) hashes of issuers of certificates and CRLs. These
+ hashes are used by the "c_rehash" script to populate
+ directories of CA certificates and CRLs, e.g. in the
+ Apache web server. Add functionality to let an Erlang
+ program find the right CRL for a given certificate in
+ such a directory.</p>
+ <p>
+ Own Id: OTP-13530</p>
+ </item>
+ <item>
+ <p>
+ Some legacy TLS 1.0 software does not tolerate the 1/n-1
+ content split BEAST mitigation technique. Add a
+ beast_mitigation SSL option (defaulting to
+ one_n_minus_one) to select or disable the BEAST
+ mitigation technique.</p>
+ <p>
+ Own Id: OTP-13629</p>
+ </item>
+ <item>
+ <p>
+ Enhance error log messages to facilitate for users to
+ understand the error</p>
+ <p>
+ Own Id: OTP-13632</p>
+ </item>
+ <item>
+ <p>
+ Increased default DH params to 2048-bit</p>
+ <p>
+ Own Id: OTP-13636</p>
+ </item>
+ <item>
+ <p>
+ Propagate CRL unknown CA error so that public_key
+ validation process continues correctly and determines
+ what should happen.</p>
+ <p>
+ Own Id: OTP-13656</p>
+ </item>
+ <item>
+ <p>
+ Introduce a flight concept for handshake packages. This
+ is a preparation for enabling DTLS, however it can also
+ have a positive effects for TLS on slow and unreliable
+ networks.</p>
+ <p>
+ Own Id: OTP-13678</p>
+ </item>
+ </list>
+ </section>
+
+</section>
+
<section><title>SSL 7.3.3</title>
<section><title>Fixed Bugs and Malfunctions</title>