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922.txt
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922.txt
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[FIG(quote)[
[FIGCAPTION[
[1] [CITE@en[RFC 5280 - Internet X.509 Public Key Infrastructure Certificate and Certificate Revocation List (CRL) Profile]]
([TIME[2015-02-22 15:44:10 +09:00]] 版)
<http://tools.ietf.org/html/rfc5280#section-4.2.1.6>
]FIGCAPTION]
> When the subjectAltName extension contains a domain name system
> label, the domain name MUST be stored in the dNSName (an IA5String).
> The name MUST be in the "preferred name syntax", as specified by
> Section 3.5 of '''['''RFC1034''']''' and as modified by Section 2.1 of
> '''['''RFC1123''']'''. Note that while uppercase and lowercase letters are
> allowed in domain names, no significance is attached to the case. In
> addition, while the string " " is a legal domain name, subjectAltName
> extensions with a dNSName of " " MUST NOT be used. Finally, the use
> of the DNS representation for Internet mail addresses
> (subscriber.example.com instead of subscriber@example.com) MUST NOT
> be used; such identities are to be encoded as rfc822Name.
]FIG]