<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=us-ascii"><meta name=Generator content="Microsoft Word 15 (filtered medium)"><style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri",sans-serif;
mso-fareast-language:EN-US;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:#0563C1;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:#954F72;
text-decoration:underline;}
span.EmailStyle17
{mso-style-type:personal;
font-family:"Calibri",sans-serif;
color:windowtext;}
span.EmailStyle18
{mso-style-type:personal;
font-family:"Calibri",sans-serif;
color:#1F497D;}
span.EmailStyle19
{mso-style-type:personal;
font-family:"Calibri",sans-serif;
color:#1F497D;}
span.EmailStyle20
{mso-style-type:personal;
font-family:"Calibri",sans-serif;
color:#1F497D;}
span.EmailStyle21
{mso-style-type:personal;
font-family:"Calibri",sans-serif;
color:#1F497D;}
span.EmailStyle22
{mso-style-type:personal;
font-family:"Calibri",sans-serif;
color:#1F497D;}
span.EmailStyle23
{mso-style-type:personal-reply;
font-family:"Calibri",sans-serif;
color:#1F497D;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;}
@page WordSection1
{size:612.0pt 792.0pt;
margin:72.0pt 72.0pt 72.0pt 72.0pt;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]--></head><body lang=EN-IN link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal><span style='color:#1F497D'>Got this solved, while updating… as the latest openssl version has a minimum curve value of P-256.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Arial",sans-serif;color:black;mso-fareast-language:EN-IN'>Thanks & Regards<br><br>Raakesh. T<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=EN-US style='mso-fareast-language:EN-IN'>From:</span></b><span lang=EN-US style='mso-fareast-language:EN-IN'> openssl-users [mailto:openssl-users-bounces@openssl.org] <b>On Behalf Of </b>Rakesh T<br><b>Sent:</b> 17 June 2016 10:32<br><b>To:</b> openssl-users@openssl.org<br><b>Cc:</b> wiki@openssl.org<br><b>Subject:</b> [openssl-users] How to choose ECDH and ECDHE with curve more than 192<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal>Hi,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I <span style='color:#1F497D'>am</span> using <span style='color:#1F497D'>tomcat server</span>, where I came across a situation where TestSSLServer(<a href="http://www.bolet.org/TestSSLServer/">http://www.bolet.org/TestSSLServer/</a>) tool reports the below, <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Highly appreciate your expertise in recommending a solution to the finding where I can choose ECDH curve size greater than 192. In the server the suites are just ECDH or ECDHE. I wonder how to restrict the curve value for the EC.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>How can i resolve this at the server end.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><i>Minimum EC size (no extension): 256<o:p></o:p></i></p><p class=MsoNormal><i>Minimum EC size (with extension): 160<o:p></o:p></i></p><p class=MsoNormal><b><i>Supported curves (size and name) </i></b><i>('*' = selected by server):<b><o:p></o:p></b></i></p><p class=MsoNormal><i> 162 sect163k1 (K-163)<o:p></o:p></i></p><p class=MsoNormal><i> 162 sect163r1<o:p></o:p></i></p><p class=MsoNormal><i> 162 sect163r2 (B-163)<o:p></o:p></i></p><p class=MsoNormal><i> 192 sect193r1<o:p></o:p></i></p><p class=MsoNormal><i> 192 sect193r2<o:p></o:p></i></p><p class=MsoNormal><i> 231 sect233k1 (K-233)<o:p></o:p></i></p><p class=MsoNormal><i> 232 sect233r1 (B-233)<o:p></o:p></i></p><p class=MsoNormal><i> 237 sect239k1<o:p></o:p></i></p><p class=MsoNormal><i> 281 sect283k1 (K-283)<o:p></o:p></i></p><p class=MsoNormal><i> 282 sect283r1 (B-283)<o:p></o:p></i></p><p class=MsoNormal><i> 407 sect409k1 (K-409)<o:p></o:p></i></p><p class=MsoNormal><i> 408 sect409r1 (B-409)<o:p></o:p></i></p><p class=MsoNormal><i> 569 sect571k1 (K-571)<o:p></o:p></i></p><p class=MsoNormal><i> 570 sect571r1 (B-571)<o:p></o:p></i></p><p class=MsoNormal><i> 160 secp160k1<o:p></o:p></i></p><p class=MsoNormal><i> 160 secp160r1<o:p></o:p></i></p><p class=MsoNormal><i> 160 secp160r2<o:p></o:p></i></p><p class=MsoNormal><i> 192 secp192k1<o:p></o:p></i></p><p class=MsoNormal><i> 192 secp192r1 (P-192)<o:p></o:p></i></p><p class=MsoNormal><i> 224 secp224k1<o:p></o:p></i></p><p class=MsoNormal><i> 224 secp224r1 (P-224)<o:p></o:p></i></p><p class=MsoNormal><i> 256 secp256k1<o:p></o:p></i></p><p class=MsoNormal><i> * 256 secp256r1 (P-256)<o:p></o:p></i></p><p class=MsoNormal><i> 384 secp384r1 (P-384)<o:p></o:p></i></p><p class=MsoNormal><i> 521 secp521r1 (P-521)<o:p></o:p></i></p><p class=MsoNormal><i>=========================================<o:p></o:p></i></p><p class=MsoNormal><b><i>WARN[SK004]: Server supports ECDH parameters smaller than 192 bits<o:p></o:p></i></b></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Thanks and highly appreciate your advice.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Arial",sans-serif;color:black;mso-fareast-language:EN-IN'>Thanks & Regards<br><br>Raakesh. T<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif;mso-fareast-language:EN-IN'><br>------------------------------------------------------------------------------------------------------------------------------- <br>[ C-DAC is on Social-Media too. Kindly follow us at: <br>Facebook: <a href="https://www.facebook.com/CDACINDIA">https://www.facebook.com/CDACINDIA</a> & Twitter: @cdacindia ] <br><br>This e-mail is for the sole use of the intended recipient(s) and may <br>contain confidential and privileged information. If you are not the <br>intended recipient, please contact the sender by reply e-mail and destroy <br>all copies and the original message. Any unauthorized review, use, <br>disclosure, dissemination, forwarding, printing or copying of this email <br>is strictly prohibited and appropriate legal action will be taken. <br>------------------------------------------------------------------------------------------------------------------------------- <o:p></o:p></span></p></div><br />-------------------------------------------------------------------------------------------------------------------------------
<br />[ C-DAC is on Social-Media too. Kindly follow us at:
<br />Facebook: https://www.facebook.com/CDACINDIA & Twitter: @cdacindia ]
<br />
<br />This e-mail is for the sole use of the intended recipient(s) and may
<br />contain confidential and privileged information. If you are not the
<br />intended recipient, please contact the sender by reply e-mail and destroy
<br />all copies and the original message. Any unauthorized review, use,
<br />disclosure, dissemination, forwarding, printing or copying of this email
<br />is strictly prohibited and appropriate legal action will be taken.
<br />-------------------------------------------------------------------------------------------------------------------------------
</body></html>