rfc1778.txt

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RFC 1778                    Syntax Encoding                   March 1995


2.23.  Postal Address

   Values of type PostalAddress are encoded according to the following
   BNF:

     <postal-address> ::= <t61string> | <t61string> '$' <postal-address>

   In the above, each <t61string> component of a postal address value is
   encoded as a value of type t61StringSyntax.

2.24.  User Password

   Values of type userPasswordSyntax are encoded as if they were of type
   octetStringSyntax.

2.25.  User Certificate

   Values of type userCertificate are encoded according to the following
   BNF:

     <certificate> ::= <version> '#' <serial> '#' <signature-algorithm-id>
                     '#' <issuer> '#' <validity> '#' <subject>
                     '#' <public-key-info> '#' <encrypted-sign-value>

     <version> ::= <integervalue>

     <serial> ::= <integervalue>

     <signature-algorithm-id> ::= <algorithm-id>

     <issuer> ::= an encoded Distinguished Name

     <validity> ::= <not-before-time> '#' <not-after-time>

     <not-before-time> ::= <utc-time>

     <not-after-time> ::= <utc-time>

     <algorithm-parameters> ::=  <null> | <integervalue> |
                                 '{ASN}' <hex-string>

     <subject> ::= an encoded Distinguished Name

     <public-key-info> ::= <algorithm-id> '#' <encrypted-sign-value>

     <encrypted-sign-value> ::= <hex-string> | <hex-string> '-' <d>

     <algorithm-id> ::= <oid> '#' <algorithm-parameters>



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RFC 1778                    Syntax Encoding                   March 1995


     <utc-time> ::= an encoded UTCTime value

     <hex-string> ::= <hex-digit> | <hex-digit> <hex-string>

2.26.  CA Certificate

   Values of type cACertificate are encoded as if the values were of
   type userCertificate.

2.27.  Authority Revocation List

   Values of type authorityRevocationList are encoded according to the
   following BNF:

<certificate-list> ::= <signature-algorithm-id> '#' <issuer> '#' <utc-time>
                        [ '#' <revoked-certificates> ]
                        '#' <signature-algorithm-id>
                        '#' <encrypted-sign-value>

<revoked-certificates> ::= 1*( '#' <revoked-certificate> )
                        <signature-algorithm-id> '#' <encrypted-sign-value>

<revoked-certificate> ::= <signature-algorithm-id> '#' <issuer> '#'
                        <serial> '#' <utc-time>

   The syntactic components <signature-algorithm-id>, <issuer>,
   <encrypted-sign-value>, <utc-time>, <subject> and <serial> have the
   same definitions as in the BNF for the userCertificate attribute
   syntax.

2.28.  Certificate Revocation List

   Values of type certificateRevocationList are encoded as if the values
   were of type authorityRevocationList.

2.29.  Cross Certificate Pair

   Values of type crossCertificatePair are encoded according to the
   following BNF:

     <certificate-pair> ::= <forward> '#' <reverse>
                             | <forward>
                             | <reverse>

     <forward> ::= 'forward:' <certificate>

     <reverse> ::= 'reverse:' <certificate>




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RFC 1778                    Syntax Encoding                   March 1995


   The syntactic component <certificate> has the same definition as in
   the BNF for the userCertificate attribute syntax.

2.30.  Delivery Method

   Values of type deliveryMethod are encoded according to the following
   BNF:

     <delivery-value> ::= <pdm> | <pdm> '$' <delivery-value>

     <pdm> ::= 'any' | 'mhs' | 'physical' | 'telex' | 'teletex' |
               'g3fax' | 'g4fax' | 'ia5' | 'videotex' | 'telephone'

2.31.  Other Mailbox

   Values of the type otherMailboxSyntax are encoded according to the
   following BNF:

     <otherMailbox> ::= <mailbox-type> '$' <mailbox>

     <mailbox-type> ::= an encoded Printable String

     <mailbox> ::= an encoded IA5 String

   In the above, <mailbox-type> represents the type of mail system in
   which the mailbox resides, for example "Internet" or "MCIMail"; and
   <mailbox> is the actual mailbox in the mail system defined by
   <mailbox-type>.

2.32.  Mail Preference

   Values of type mailPreferenceOption are encoded according to the
   following BNF:

     <mail-preference> ::= "NO-LISTS" | "ANY-LIST" | "PROFESSIONAL-LISTS"

2.33.  MHS OR Address

   Values of type MHS OR Address are encoded as strings, according to
   the format defined in [10].











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RFC 1778                    Syntax Encoding                   March 1995


2.34.  Distribution List Submit Permission

   Values of type DLSubmitPermission are encoded as strings, according
   to the following BNF:

     <dlsubmit-perm> ::= <dlgroup_label> ':' <dlgroup-value>
                             | <dl-label> ':' <dl-value>

     <dlgroup-label> ::= 'group_member'

     <dlgroup-value> ::= <name>

     <name> ::= an encoded Distinguished Name

     <dl-label> ::= 'individual' | 'dl_member' | 'pattern'

     <dl-value> ::= <orname>

     <orname> ::= <address> '#' <dn>
            |  <address>

     <address> ::= <add-label> ':' <oraddress>

     <dn> ::= <dn-label> ':' <name>

     <add-label> = 'X400'

     <dn-label> = 'X500'

   where <oraddress> is as defined in RFC 1327.

2.35.  Photo

   Values of type Photo are encoded as if they were octet strings
   containing JPEG images in the JPEG File Interchange Format (JFIF), as
   described in [8].

2.36.  Fax

   Values of type Fax are encoded as if they were octet strings
   containing Group 3 Fax images as defined in [7].










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RFC 1778                    Syntax Encoding                   March 1995


3.  Security Considerations

   Security issues are not discussed in this memo.

4.  Acknowledgements

   Many of the attribute syntax encodings defined in this document are
   adapted from those used in the QUIPU X.500 implementation. The
   contributions of the authors of the QUIPU implementation in the
   specification of the QUIPU syntaxes [4] are gratefully acknowledged.

5.  Bibliography

   [1] The Directory: Selected Attribute Syntaxes.  CCITT,
       Recommendation X.520.

   [2] Information Processing Systems -- Open Systems Interconnection --
       The Directory: Selected Attribute Syntaxes.

   [3] Barker, P., and S. Kille, "The COSINE and Internet X.500 Schema",
       RFC 1274, University College London, November 1991.

   [4] The ISO Development Environment: User's Manual -- Volume 5:
       QUIPU.  Colin Robbins, Stephen E. Kille.

   [5] Kille, S., "A String Representation of Distinguished Names", RFC
       1779, ISODE Consortium, March 1995.

   [6] Kille, S., "A String Representation for Presentation Addresses",
       RFC 1278, University College London, November 1991.

   [7] Terminal Equipment and Protocols for Telematic Services -
       Standardization of Group 3 facsimile apparatus for document
       transmission.  CCITT, Recommendation T.4.

   [8] JPEG File Interchange Format (Version 1.02).  Eric Hamilton, C-
       Cube Microsystems, Milpitas, CA, September 1, 1992.

   [9] Yeong, W., Howes, T., and S. Kille, "Lightweight Directory Access
       Protocol", RFC 1777, Performance Systems International,
       University of Michigan, ISODE Consortium, March 1995.

  [10] Alvestrand, H., Kille, S., Miles, R., Rose, M., and S.  Thompson,
       "Mapping between X.400 and RFC-822 Message Bodies", RFC 1495,
       SINTEF DELAB, ISODE Consortium, Soft*Switch, Inc., Dover Beach
       Consulting, Inc., Soft*Switch, Inc., August 1993.





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6.  Authors' Addresses

       Tim Howes
       University of Michigan
       ITD Research Systems
       535 W William St.
       Ann Arbor, MI 48103-4943
       USA

       Phone: [phone]
       EMail: [e-mail]


       Steve Kille
       ISODE Consortium
       PO Box 505
       London
       SW11 1DX
       UK

       Phone: [phone]
       EMail: [e-mail]


       Wengyik Yeong
       PSI Inc.
       510 Huntmar Park Drive
       Herndon, VA 22070
       USA

       Phone: [phone]
       EMail: [e-mail]


       Colin Robbins
       NeXor Ltd
       University Park
       Nottingham
       NG7 2RD
       UK











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