System information

Subject Alternative Name Extension
The GenSubjectAltNameExt creates a base-64 encoded blob to add the alternate subject name
extension, SubjectAltNameExt (OID 2.5.29.17), to the new certificate. This blob is pasted into
the certificate approval page when the certificate is created.
1. Syntax
The GenSubjAltNameExt tool uses parameter pairs where the first parameter specifies the type
of name format, and the second parameter gives that name in the specified format.
This tool has the following syntax:
GenSubjectAltNameExt general_type0 general_name0 ... general_typeN
general_nameN
Parameter Description
general_type Sets the type of name that is used. This can
be any of the following strings:
• RFC822Name
• DirectoryName
• DNSName
• EDIPartyName
• URIName
• IPAddress
• OIDName
• OtherName
general_name A string, conforming to the specified format, of
the subject name.
• For RFC822Name, the value must be a valid
Internet mail address. For example,
[e-mail].
• For DirectoryName, the value must be a
string form of X.500 name, similar to the
subject name in a certificate. For example,
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