Hi Robert,

See inline comment below.

> On 18. Nov 2025, at 19:06, Robert Moskowitz 
> <[email protected]> wrote:
> 
> I do not see any example of subjectAltName and specifically iPAddress.
> 
> I am using it....

LL: Please follow the Section „6.21. Subject Altnative Name“, which redirects 
to Section 3.5.

In the sub-section 3.5.2, the extension „Subject Alternative Name“ is in offset 
range [156, 317]. And the IPAddress is in the offset range [253, 259].

> 
> And if DN is in subjectAltName, is it any different than in subject or issuer?

LL: The encoding of DN in subjectAltName is as follows in Section 3.5.2 (offset 
range [170, 179])

170:         02             # GeneralNameType=2: dNSName
171:         67             # GeneralNameValue=char[7]
172:           6162632E636F6D  # "abc.com"

If occurs in Name (subject or issuer), it will be encoded as normal string / 
text, and the value is  as in the subjectAltName extension, e.g. 
„6162632E636F6D“ for abc.com

> 
> thanks
> 
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Cheers, Lijun
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