[openssl-users] Hardware client certificates moving to Centos 7

Michael Wojcik Michael.Wojcik at microfocus.com
Wed Sep 27 18:02:24 UTC 2017

> From: openssl-users [mailto:openssl-users-bounces at openssl.org] On Behalf
> Of Jochen Bern
> Sent: Wednesday, September 27, 2017 06:51
> To: openssl-users at openssl.org
> Subject: Re: [openssl-users] Hardware client certificates moving to Centos 7
> I don't know offhand which OpenSSL versions did away with MD5, but you
> *can* install an 0.9.8e (+ RHEL/CentOS backported security patches)
> straight off CentOS 7 repos:

Ugh. No need for 0.9.8e (which is from, what, the early Industrial Revolution?). MD5 is still available in OpenSSL 1.0.2, assuming it wasn't disabled in the build configuration. I think Stuart is dealing with an OpenSSL build that had MD5 disabled in the Configure step.

Heck, MD4 and MDC2 are still available in 1.0.2 - even with the default configuration, I believe. I'm looking at 1.0.2j here and it has GOST, MD4, MD5, MDC2, RIPEMD-60, SHA, SHA1, SHA-2 (all standard lengths), and Whirlpool.

That's just for digests, obviously; but the point is the MD5 support is still there. And yes, 1.0.2j can handle certificates with md5WithRsaEncryption signatures.

Michael Wojcik 
Distinguished Engineer, Micro Focus 

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