UserDataType

• The version and encoding attributes are required.

• The user data is base64-encoded as described in RFC3548 with the following additional restrictions:

  • Implementations MUST NOT add line feeds to encoded data.

  • Implementations MUST pad the end of the encoded data with '=' if required.

  • Implementations MUST ignore characters in the encoded stream that are not in the encoding alphabet. This differs from RFC3548, but provides more leeway for clients.

  • Implementation MUST use the encoding alphabet in table 1 of RFC3548 (i.e. A-Za-z0-9+/).

  • Implementation MUST follow the user data size limit before base64 encoding.