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I need an SSL certificate with a few extra uncommon EKUs (i.e. 1.3.6.1.5.5.8.2.2, "IPSec Intermediate System Usage"). Self-signed certificate is not an option. Does anybody know about any CAs that allow additional EKUs? I contacted Namecheap, Comodo and Godaddy, and all of them replied that they cannot issue one.

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    Why is self signed not an option? Is an enterprise CA een option? – hertitu Feb 15 '17 at 20:31
  • I don't want users to be forced to install my root certificate. Thus, I'd prefer to have a certificate signed by a recognized CA. – Roman Dmitrienko Feb 16 '17 at 6:42
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The Baseline Requirements from the CA/Browser Forum are rather strict about inceluding extendedKeyUsage values in a certificate which are non-standard. While it is not completely forbidden, the wording is such, that a CA will usually want to avoid the hassle (see section 7.1.2.4).

Some Root Stores (Microsoft) even require of CAs to explicitely state all possible EKU values in advance, that a root or intermediate certificate might sign.

  • Thanks for pointing out the requirements! Well, that apparently means that what I was intending to do is all but impossible. – Roman Dmitrienko Jun 20 '17 at 11:16
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    Probably. And even if you really find a CA, it would probably be VERY expensive. – mat Jun 20 '17 at 12:18

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