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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">What is the information you’re looking for? “kx=X25519” or kx=”2KRSA” or … ? I picked those because sometimes there’s a keysize, and other times it’s implicit,
for example. The internal table is going to need restructuring.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">--
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Senior Architect, Akamai Technologies<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">IM: richsalz@jabber.at Twitter: RichSalz<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Richard Moore [mailto:richmoore44@gmail.com]
<br>
<b>Sent:</b> Monday, April 20, 2015 4:22 PM<br>
<b>To:</b> openssl-dev@openssl.org<br>
<b>Subject:</b> Re: [openssl-dev] Missing API features<o:p></o:p></span></p>
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<p class="MsoNormal">On 20 April 2015 at 15:33, Salz, Rich <<a href="mailto:rsalz@akamai.com" target="_blank">rsalz@akamai.com</a>> wrote:<o:p></o:p></p>
<p class="MsoNormal" style="margin-bottom:12.0pt">>Continuing with the problems of making structs opaque, currently the API for querying the information about ciphers is quite weak. Only >SSL_CIPHER_description provides access to data such as the key exchange
method, and parsing a string to obtain this information seems daft. We're >missing API for: key exchange, authentication method, encryption algorithm, MAC and the export flag.<br>
<br>
(Man, outlook makes it hard to NOT top-post. Sigh.)<br>
<br>
Since all of those are implied by the cipher spec, could we just have an API to return the two-byte cipher identifier? (That would break if TLS 1.3 moves to "a la carte" selection, but I doubt that will happen.) Export is gone :) And what's the MAC if using
an AEAD cipher like AES-GCM?<o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Verdana","sans-serif"">Just returning the cipher id would mean every app needs to replicate the table that openssl already has, and keep it updated. Doesn't seem like a good plan to me. According to the current
code in openssl the 'MAC' when using AES-GCM is AEAD - not ideal perhaps, but what we've got.<o:p></o:p></span></p>
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<p class="MsoNormal">> It's also worth noting that SSL_CIPHER_get_version and SSL_CIPHER_description should probably be returning const char * not char *.<br>
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Yes, is that a bug to backport or just fix in master, you think?<o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Verdana","sans-serif"">Changing the return type here should be binary compatible on any sane platform, but it might cause source incompatibilities.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Verdana","sans-serif"">Cheers<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Verdana","sans-serif"">Rich.<o:p></o:p></span></p>
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