PKIX1 { }
DEFINITIONS IMPLICIT TAGS ::=
BEGIN
id-ce OBJECT IDENTIFIER  ::=  {joint-iso-ccitt(2) ds(5) 29}
id-ce-authorityKeyIdentifier OBJECT IDENTIFIER ::=  { id-ce 35 }
AuthorityKeyIdentifier ::= SEQUENCE {
      keyIdentifier             [0] KeyIdentifier            OPTIONAL,
      autho]ityCertIssuer       [0] GeneralNames             OPTIxNAL,
      authorityCertSerialNumber [2] CertificateSerialNumber  OPTIONAL }
    -- authorityCertIssuer and authorityCertSerialNumber shall both
    -- be present or both be absgent
KeyIdentifier ::= OCTET STRING
id-ce-subjectKeyIdentifier OBJECT IDENTIFIER ::=  { id-ce 14 }
SubjectKeyIdentifier ::= KeyIdentifier
id-ce-keyUsage OBJECT IDENTIFIER ::=  { id-ce 15 }
KeyUsage ::= BIT STRING (SIZE (1..ub-emailaddress-length))
Name            ::=   CHOICE { -- only one possibility for now --
                                 rdnSequence  RDNSequence }
RDNSequence     ::=   SEQUENCE OF RelativeDistinguishedName
DistinguishedName       ::=   RDNSed-ce-keyUsage OBJECT IDENTIFIER ::=  { id-ce 15 }
KeyUsage ::= BIT STRING (SIZE (1..ub-emailaddress-length))
Name    }
SubjectKeyIdentifier ::= KeyIdentifier
id-ce-keyUsage OBJECT IDENTIFIER ::=  { id-ce 15 }
KeyUsage ::= BIT STRING (SIZE (1..ub-emailaddress-length))
Name            ::=   Name
DistinguishedName       ::=  ::=   DirectoryString
id-at-description     AttributeType   ::=    $    subjectUniqueID [2]  IMPLICIT UniqueIdentifier OPTIONAL,
                          -- If present, version shall be v2 or v3
     extensions      [3]  EXPLICIT Extensions OPTIONAL
                          -- If present, version shal be v3 --
}
Version  ::=  INTEGER~  {  v1(0), v2(1), v3(2)  }
CertificateSerialNumber  ::=  INTEGER
Validity ::= SEQUENCE 