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https://issues.apache.org/jira/browse/TS-2392?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jan-Frode Myklebust updated TS-2392:
------------------------------------
Description:
ATS does not seem to support the elliptic curve diffie hellman ephemeral key
exchanges (ECDH) that are available in openssl. It seems these needs to be
enabled explicitly to take advantage of them. Ref: the following commit for how
this support was added to apache httpd v2.3.3:
http://mail-archives.apache.org/mod_mbox/httpd-cvs/200911.mbox/%[email protected]%3E
and for stud:
https://github.com/bumptech/stud/pull/61/files
Maybe both a DH key exchange needs to be set up, and then the various elliptic
curves needs to be initialized..?
Checking the openssl docs, I see SSL_CTX_set_tmp_dh_callback() needs to be
called to set up the ephemeral keys:
http://www.openssl.org/docs/ssl/SSL_CTX_set_tmp_dh_callback.html
https://tech.immerda.ch/2011/11/the-state-of-forward-secrecy-in-openssl/
http://wiki.openssl.org/index.php/Elliptic_Curve_Diffie_Hellman
And these are the named curves available with openssl-1.0.1e-16.el6_5.x86_64 on
RHEL-6.5:
{noformat}
$ openssl ecparam -list_curves
secp384r1 : NIST/SECG curve over a 384 bit prime field
prime256v1: X9.62/SECG curve over a 256 bit prime field
{noformat}
was:
ATS does not seem to support the elliptic curve diffie hellman ephemeral key
exchanges (ECDH) that are available in openssl. It seems these needs to be
enabled explicitly to take advantage of them. Ref: the following commit for how
this support was added to apache httpd v2.3.3:
http://mail-archives.apache.org/mod_mbox/httpd-cvs/200911.mbox/%[email protected]%3E
and for stud:
https://github.com/bumptech/stud/pull/61/files
Maybe both a DH key exchange needs to be set up, and then the various elliptic
curves needs to be initialized..?
Checking the openssl docs, I see SSL_CTX_set_tmp_dh_callback() needs to be
called to set up the ephemeral keys:
http://www.openssl.org/docs/ssl/SSL_CTX_set_tmp_dh_callback.html
https://tech.immerda.ch/2011/11/the-state-of-forward-secrecy-in-openssl/
> Enable elliptic curve ciphers to support forward secrecy
> --------------------------------------------------------
>
> Key: TS-2392
> URL: https://issues.apache.org/jira/browse/TS-2392
> Project: Traffic Server
> Issue Type: Improvement
> Components: SSL
> Reporter: Jan-Frode Myklebust
>
> ATS does not seem to support the elliptic curve diffie hellman ephemeral key
> exchanges (ECDH) that are available in openssl. It seems these needs to be
> enabled explicitly to take advantage of them. Ref: the following commit for
> how this support was added to apache httpd v2.3.3:
> http://mail-archives.apache.org/mod_mbox/httpd-cvs/200911.mbox/%[email protected]%3E
> and for stud:
> https://github.com/bumptech/stud/pull/61/files
> Maybe both a DH key exchange needs to be set up, and then the various
> elliptic curves needs to be initialized..?
> Checking the openssl docs, I see SSL_CTX_set_tmp_dh_callback() needs to be
> called to set up the ephemeral keys:
> http://www.openssl.org/docs/ssl/SSL_CTX_set_tmp_dh_callback.html
> https://tech.immerda.ch/2011/11/the-state-of-forward-secrecy-in-openssl/
> http://wiki.openssl.org/index.php/Elliptic_Curve_Diffie_Hellman
> And these are the named curves available with openssl-1.0.1e-16.el6_5.x86_64
> on RHEL-6.5:
> {noformat}
> $ openssl ecparam -list_curves
> secp384r1 : NIST/SECG curve over a 384 bit prime field
> prime256v1: X9.62/SECG curve over a 256 bit prime field
> {noformat}
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