INTERNET-DRAFT D. Marschall Intended Status: Informational ViaThinkSoft Expires: April 4, 2022 October 1, 2021 Retrieving information about Object Identifiers using a text-based protocol draft-viathinksoft-oidip-01 Abstract This document defines a method for retrieving information about Object Identifiers (OIDs) and their associated Registration Authorities (RAs) using a text-based protocol, in a way that is both human-readable and machine-readable. Status of This Memo This Internet-Draft is submitted in full conformance with the provisions of BCP 78 and BCP 79. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF). Note that other groups may also distribute working documents as Internet-Drafts. The list of current Internet- Drafts is at https://datatracker.ietf.org/drafts/current/. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as "work in progress." This Internet-Draft will expire on September 9, 2021. Copyright Notice Copyright (c) 2021 IETF Trust and the persons identified as the document authors. All rights reserved. This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents (https://trustee.ietf.org/license-info) in effect on the date of publication of this document. Please review these documents Marschall Expires April 4, 2022 [Page 1] INTERNET DRAFT OID Information Protocol October 1, 2021 carefully, as they describe your rights and restrictions with respect to this document. Code Components extracted from this document must include Simplified BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Simplified BSD License. Table of Contents 1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.1 Terminology . . . . . . . . . . . . . . . . . . . . . . . . 4 2 Request . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2.1 Authentication Tokens . . . . . . . . . . . . . . . . . . . 5 2.2 Server Commands . . . . . . . . . . . . . . . . . . . . . . 5 2.2.1 "Format" command . . . . . . . . . . . . . . . . . . . 5 2.3 Request ABNF Notation . . . . . . . . . . . . . . . . . . . 6 3 Response . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 3.1 Format and Encoding . . . . . . . . . . . . . . . . . . . . 6 3.2 Structure . . . . . . . . . . . . . . . . . . . . . . . . . 7 3.2.1 Query-Section (Information about Query and Result) . . 7 3.2.2 Object-Section (Information about the OID) . . . . . . 8 3.2.3 RA-Section (Information about the Current RA) . . . . . 12 3.2.4 Sections for Previous Registration Authorities . . . . 13 3.3 Digital Signature . . . . . . . . . . . . . . . . . . . . . 14 3.4 Date/Time Format . . . . . . . . . . . . . . . . . . . . . 14 3.4.1 Date/Time Format ABNF Notation . . . . . . . . . . . . 15 3.4.2 Date/Time Format Examples . . . . . . . . . . . . . . . 15 4 Referral . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 5 Full Example . . . . . . . . . . . . . . . . . . . . . . . . . 17 5.1 Request . . . . . . . . . . . . . . . . . . . . . . . . . . 17 5.2 Response . . . . . . . . . . . . . . . . . . . . . . . . . 17 6 Alternative Namespaces . . . . . . . . . . . . . . . . . . . . 18 6.1 Example: UUID Namespace . . . . . . . . . . . . . . . . . . 19 7 Internationalization Considerations . . . . . . . . . . . . . . 19 8 Security Considerations . . . . . . . . . . . . . . . . . . . . 20 9 IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 21 9.1 Port Numbers . . . . . . . . . . . . . . . . . . . . . . . 21 10 References . . . . . . . . . . . . . . . . . . . . . . . . . . 21 10.1 Normative References . . . . . . . . . . . . . . . . . . . 21 10.2 Informative References . . . . . . . . . . . . . . . . . . 22 Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . . . 23 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 23 Marschall Expires April 4, 2022 [Page 2] INTERNET DRAFT OID Information Protocol October 1, 2021 1 Introduction An Object Identifier (OID) is an extensively used identification mechanism jointly developed by ITU-T and ISO/IEC for naming any type of object with a globally unambiguous name. OIDs provide a persistent identification of objects based on a hierarchical structure of Registration Authorities (RA), where each parent has an Object Identifier and allocates Object Identifiers to child nodes. More information about Object Identifiers can be found in Recommendation ITU-T X.660 (2011) | ISO/IEC 9834-1:2012 [X660]. There are a few methods of retrieving information about an OID, like: (A) Searching through web repositories like or . This has the disadvantage that the information is usually not machine-readable without functionalities like an API. (B) Retrieving information using the Object Identifier Resolution System (ORS) as defined in Recommendation ITU-T X.672 (2010) | ISO/IEC 29168-1:2011 [X672]. This has the disadvantage that Registration Authorities need to include specific DNS Resource Records to their domains, and additionally, all RAs of the superior OIDs must implement the ORS. This document describes an additional method for retrieving information about OIDs, which is both human-readable and machine- readable. Three of many possible use-case scenarios are: (1) Many web-browsers and Operating Systems can handle ITU-T X.509 certificates [X509] and usually contain a viewer application that shows the contents of these certificates. Attributes that are unknown by the application are either only displayed by their OID, or hidden to avoid confusion to the user. With OID-IP, the application could query the name of these unknown OIDs or even retrieve instructions on how the data described by this OID can be parsed and displayed. (2) Applications that handle SNMP (Simple Network Management Protocol) [RFC1157] might need information about additional MIB files or their OIDs. OID-IP could aid these applications in gathering the required information. (3) In directory services like LDAP (Lightweight Directory Access Protocol) [RFC4511], applications could query the name of attributes that are described by an OID the application doesn't know. Marschall Expires April 4, 2022 [Page 3] INTERNET DRAFT OID Information Protocol October 1, 2021 1.1 Terminology The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in RFC 2119 [RFC2119]. In this document, "RA" is an abbreviation for "Registration Authority", "OID" is an abbreviation for "Object Identifier" and "OID-IP" is an abbreviation for "Object Identifier Information Protocol". 2 Request OID-IP is a text-based protocol. An OID-IP server listens on TCP port XXX for requests from OID-IP clients. The OID-IP client makes a text request to the OID-IP server, then the OID-IP server replies with text content. All requests are terminated with ASCII CR followed by ASCII LF. The response contains multiple lines of text, separated by ASCII CR followed by ASCII LF. The OID-IP server closes its connection as soon as the output is finished. The closed TCP connection is the indication to the client that the response has been received. Alternatively to TCP port XXX, an OID-IP server can listen to the WHOIS TCP port 43. Existing WHOIS servers can add the functionalities described in this document in addition to their usual operation, i.e. they may accept queries beginning with "oid:" as well as other types of queries. During the request, the client sends a query beginning with "oid:", followed by an OID in dot-notation, as defined in RFC 3061, section 2 [RFC3061], but with the following differences: (1) The OID MAY contain a leading dot. (2) To query the root of the OID tree, the OID MUST be either missing or consisting only of a single dot. Examples of valid queries are: oid: oid:. oid:2.999 oid:.2.999 All OIDs MUST be interpreted as absolute OIDs. Relative OIDs (e.g. relative to the OID of the Registration Authority operating the OID- Marschall Expires April 4, 2022 [Page 4] INTERNET DRAFT OID Information Protocol October 1, 2021 IP service) are not allowed. The namespace identifier (i.e. "oid") MUST be written in lower-case. 2.1 Authentication Tokens Some organizations might not want to present their OID information (or part of it) to the public, e.g. for reasons like privacy or confidentiality. Therefore, at the end of the query, the client can append case-sensitive, non-empty alphanumeric authentication tokens to control the display of confidential information. Each authentication token MUST be prepended by a dollar sign ("$"). Examples of valid queries are: oid:2.999$firstToken oid:2.999$firstToken$secondToken Please note that authentication tokens are only weak protection. For more information, see section 8 "Security Considerations". 2.2 Server Commands The client can send additional information to the server using "server commands". These are similar to Authentication Tokens, with the difference that they contain an equal sign ("=") which divides the "name" from the "value". Names and values are case-sensitive alphanumeric strings. A request can contain multiple server commands which are each prepended by a dollar sign ("$"). The usage of server commands is individual for each server and implementation. The following request is an example of a valid query where the client sends a "format" command with the value "text" and an "antispam" command with the value "1": oid:2.999$format=text$antispam=1 2.2.1 "Format" command The "format" command defines the output format of the server response. The default value "text", which is assumed if the "format" command is omitted, instructs the server to reply with the text-based format described in this document. Other values like "json", "xml", or "html" are subject to be defined by future specifications. Marschall Expires April 4, 2022 [Page 5] INTERNET DRAFT OID Information Protocol October 1, 2021 2.3 Request ABNF Notation To define the query string, the following Augmented BNF definitions will be used. They are based on the ABNF styles of RFC 5234 [RFC5234]. query = namespace ":" optional-oid *( "$" authtoken ) *( "$" cmdname "=" cmdval ) namespace = %x6F %x69 %x64 ; "oid" optional-oid = [ "." ] [ oid ] oid = unsigned-number *( "." unsigned-number ) authtoken = 1*( char-or-digit ) cmdname = 1*( char-or-digit ) cmdval = 1*( char-or-digit ) digit = %x30-39 ; 0-9 nonzero-digit = %x31-39 ; 1-9 uppercase-char = %x41-5A ; A-Z lowercase-char = %x61-7A ; a-z char-or-digit = uppercase-char / lowercase-char / digit unsigned-number = "0" / nonzero-digit *( digit ) 3 Response 3.1 Format and Encoding (1) The response MUST be UTF-8 encoded (as defined in RFC 3629 [RFC3629]), without Byte-Order-Mark (BOM). (2) The response contains multiple lines with field names and values, which MUST be separated by a double colon (":"). Whitespace characters after the double colon are allowed. (3) If possible, each line SHOULD be limited to 80 characters, including the field name, double colon, value, and whitespaces. (4) Field names and values MUST be treated case-sensitive. Marschall Expires April 4, 2022 [Page 6] INTERNET DRAFT OID Information Protocol October 1, 2021 (5) If a value needs to be split into multiple lines, e.g. if the line would exceed the length limit, the same field name including double colon MUST be repeated at the beginning of the next line. (6) If an attribute has multiple values (e.g. multiple Unicode labels, alternative email addresses, etc.), each value MUST be written in a new line with the same field name. (7) Lines with the same field name SHALL be kept together. (8) Comment lines MUST start with a percent sign ("%") at the beginning of a line, without prepending whitespaces. They MUST NOT be evaluated by machines (except for signature validation, as mentioned in section 3.3 "Digital Signature"). 3.2 Structure A response consists of sections, which SHOULD be separated by at least one empty line and/or comment line. This document specifies the following sections (which SHALL stay in this order): (1) Query-Section which contains the request and the result. This section MUST start with the field "query". (2) Object-Section which contains information about the OID. This section MUST start with the field "object". (3) RA-Section which contains information about the current Registration Authority. This section MUST start with the field "ra". (4) Optional RA-Sections containing information about RAs that were previously in charge of managing the OID. The OID-IP service MAY define additional sections after any of these sections, but the Query-Section MUST be the first section in the response. 3.2.1 Query-Section (Information about Query and Result) This section MUST always be present and MUST start with the field "query". It MUST be the first section in the response. Possible fields are: (1) "query" MUST be present and contain the request of the client (beginning with the namespace identifier and double colon, i.e. Marschall Expires April 4, 2022 [Page 7] INTERNET DRAFT OID Information Protocol October 1, 2021 "oid:"). Canonization or sanitation (like removing a leading dot) SHOULD NOT be applied at this step. Authentication tokens SHOULD be omitted, though. (2) "result" MUST be present and SHALL be one of the following values: "Found" means that the OID-IP service can verify that the requested OID exists. The following sections will contain information about this OID. "Not found; superior object found" means that the OID-IP service cannot verify that the requested OID exists, or it denies that the OID exists (e.g. because it is confidential). However, the OID-IP service knows a superior OID which does exist. The following sections will contain information about that superior OID instead. "Not found" means that the OID-IP service cannot verify that the requested OID exists, or it denies that the OID exists (e.g. because it is confidential). Additionally, the OID-IP service does not have information about any superior OID, or their existence is also denied. "Service error" means that an internal error occurred, or that the system is in maintenance mode. The client should try again later. (3) "distance" SHOULD be present if it is applicable in the requested namespace (it is always applicable for OIDs) and if the result is "Not found; superior object found". A distance of 1 means that the direct parent was found. A distance of 2 means that the grand-parent was found, etc. (4) "message" SHOULD be present if the result is "Service error". It contains a message explaining why the service is not available (e.g. displaying an error message). It MUST NOT be present if the result has a different value. The OID-IP service SHOULD NOT add additional fields to this section. 3.2.2 Object-Section (Information about the OID) This section MUST be present if the result is "Found" or "Not found; superior object found". It MUST start with the field "object". It MUST NOT be present if the result is "Not found" or "Service error". Possible fields are: Marschall Expires April 4, 2022 [Page 8] INTERNET DRAFT OID Information Protocol October 1, 2021 (1) "object" contains the OID in dot-notation, prepended by the namespace identifier and double colon ("oid:"). This field MUST be present. (2) "status" MUST be present and SHALL be one of the following values: "Information available" means that information about the OID is fully available. "Information partially available" means that part of the information about the OID is not available. Possible reasons could be that part of the information is redacted due to confidentiality, or the OID-IP service only knows basic information, while the full information can be found somewhere else (e.g. at a referred OID-IP service). The field "attribute" MAY be used with the value "confidential". "Information unavailable" means that the information about the OID is missing, redacted due to confidentiality, or otherwise unavailable. The field "attribute" MAY be used with the value "confidential". (3) "name" (OPTIONAL) contains the name of the OID. It SHOULD be as short as possible. (4) "description" (OPTIONAL) contains a short description of the OID. The description SHOULD only be a single sentence. (5) "information" (OPTIONAL) contains additional information, e.g. Management Information Base (MIB) definitions. (6) "url" (OPTIONAL, multiple values allowed) contains a URL (as defined in RFC 3986 [RFC3986]) leading to more information about the OID. (7) "asn1-notation" (OPTIONAL, multiple values allowed) contains one or more possible notations in the ASN.1 syntax, as defined in Recommendation ITU-T X.680 (2015) | ISO/IEC 8824-1:2015, clause 32.3 [X680], e.g. {joint-iso-itu-t(2) example(999)}. Note: A line-break, to break up lines that are too long, as defined in section 3.1 ("Format and Encoding") SHOULD be used. This is no problem because multiple ASN.1 notations can be distinguished by their opening curly bracket and their closing curly bracket. (8) "iri-notation" (OPTIONAL, multiple values allowed) contains one Marschall Expires April 4, 2022 [Page 9] INTERNET DRAFT OID Information Protocol October 1, 2021 or more possible notations in the OID-IRI syntax, as defined in Recommendation ITU-T X.680 (2015) | ISO/IEC 8824-1:2015, clause 34.3 [X680] (but without quotation marks), e.g. /Joint-ISO-ITU-T/Example. Note: A line-break, to break up lines which are too long, as defined in section 3.1 ("Format and Encoding") SHALL NOT be used, otherwise, it would be ambiguous if the line-break was used to shorten the line, or if the line-break indicates a new value in case multiple OID-IRI notations are supplied. (9) "identifier" (OPTIONAL, multiple values allowed) contains an alphanumeric identifier ("NameForm") as defined in Recommendation ITU-T X.680 (2015) | ISO/IEC 8824-1:2015, clause 12.3 [X680]. (10) "standardized-id" (OPTIONAL, multiple values allowed) contains an alphanumeric identifier that has a standardized "NameForm", i.e. in ASN.1 notation, it can be written without its associated number. See more information in Recommendation ITU-T X.680 (2015) | ISO/IEC 8824-1:2015, clause 32.7 [X680]. (11) "unicode-label" (OPTIONAL, multiple values allowed) contains a Non-integer Unicode label, as defined in Recommendation ITU-T X.680 (2015) | ISO/IEC 8824-1:2015, clause 12.27 [X680]. (12) "long-arc" (OPTIONAL, multiple values allowed) contains a Non- integer Unicode label that can be used as the first identifier in an OID Internationalized Resource Identifier (OID-IRI), shortening it. More information can be found in Recommendation ITU-T X.660 (2011) | ISO/IEC 9834-1:2012, clause 3.5.8 [X660]. (13) "oidip-service" (OPTIONAL) contains an IP address or hostname of a system that offers an OID-IP service that can supply information about the OID and/or its subordinate OIDs, followed by a double-colon (:) and a port number. If the result is "Found" (i.e. the OID is existing in the local database), then the information "oidip-service" is only informational; its existence is most likely a hint that subordinate OIDs will be found at that OID-IP server. If the result is "Not found; superior object found", then the client SHOULD query the referred OID-IP server to receive more information about the OID. See more information in section 4 "Referral". (14) "attribute" (OPTIONAL, multiple values allowed) contains attributes of the OID. An attribute MUST be one of the following values: "confidential" means that information about the OID or part of it is confidential. Marschall Expires April 4, 2022 [Page 10] INTERNET DRAFT OID Information Protocol October 1, 2021 "draft" means that the allocation of the OID is not yet official and the information is subject to change without notice. This includes deletion and relocation. "frozen" means that no more child OIDs can be created under this OID, e.g. because the RA has stopped operating, but the existing child OIDs stay valid. "leaf" means that no child OIDs can be allocated under this OID. The field "subordinate" SHALL therefore not be present. "no-identifiers" means that the RA is not allocating alphanumeric identifiers. "no-unicode-labels" means that the RA is not allocating Non- integer Unicode labels. "retired" means that the OID is withdrawn, revoked, retired, expired, etc. Please consult Recommendation ITU-T X.660 (2011) | ISO/IEC 9834-1:2012 [X660] for more information about such cases. (15) "parent" (OPTIONAL) contains the OID of the nearest known parent OID, prepended by namespace identifier and double colon, i.e. "oid:". It MAY be followed by additional human-readable information, e.g. a description or a list of ASN.1 identifiers. There SHALL be at least 1 whitespace in between. (16) "subordinate" (OPTIONAL, multiple values allowed) contains a list of subordinate OIDs, prepended by namespace identifier and double colon, i.e. "oid:". It MAY be followed by additional human- readable information, e.g. a description or a list of ASN.1 identifiers. There SHALL be at least 1 whitespace in between. (17) "created" (OPTIONAL) contains the date and time (as specified in section 3.4 "Date/Time Format") when the OID was first allocated by the RA of the superior OID. (18) "updated" (OPTIONAL) contains the date and time (as specified in section 3.4 "Date/Time Format") when the OID information was last updated. Additional fields can be defined by the OID-IP service. The field names SHALL only consist of the lower-case letters "a..z", hyphens ("-"), and numbers, and SHOULD be written in the English language. The field name MUST NOT begin or end with a hyphen and a hyphen MUST NOT be followed by another hyphen. Marschall Expires April 4, 2022 [Page 11] INTERNET DRAFT OID Information Protocol October 1, 2021 3.2.3 RA-Section (Information about the Current RA) This section MUST NOT be present if the result is "Not found" or "Service error", otherwise it MAY be present. If it is present, it MUST start with the field "ra". Possible fields are: (1) "ra" contains a general name of the RA, like the name of a person, the name of a group, or the name of an organization. This field MUST be present. (2) "ra-status" MUST be present and SHALL be one of the following values: "Information available" means that information about this RA is fully available. "Information partially available" means that part of the information is not available. A possible reason could be that part of the information is redacted due to confidentiality. The field "attribute" MAY be used with the value "confidential". "Information unavailable" means that the data is missing (if the OID-IP service only knows the name of the RA and nothing else), redacted due to confidentiality, or otherwise unavailable. The field "attribute" MAY be used with the value "confidential". (3) "ra-contact-name" (OPTIONAL, multiple values allowed) contains the name of a person responsible for the allocation of subordinate OIDs, in case "ra" is a group or organization. (4) "ra-address" (OPTIONAL) contains the physical location of the RA. While a fully qualified postal address is recommended, the field can also just contain a rough location like city and country name, state and country name, or just the country name, etc. The name of the country SHOULD always be present. (5) "ra-phone" (OPTIONAL, multiple values allowed) contains a landline phone number of the Registration Authority. It SHOULD be written in the international number format specified in Recommendation ITU-T E.164 (2010) [E164], e.g. +1 206 555 0100. (6) "ra-mobile" (OPTIONAL, multiple values allowed) contains a mobile phone number of the Registration Authority. It SHOULD be written in the international number format specified in Recommendation ITU-T E.164 (2010) [E164], e.g. +1 206 555 0100. Marschall Expires April 4, 2022 [Page 12] INTERNET DRAFT OID Information Protocol October 1, 2021 (7) "ra-fax" (OPTIONAL, multiple values allowed) contains a fax number of the Registration Authority. It SHOULD be written in the international number format specified in Recommendation ITU-T E.164 (2010) [E164], e.g. +1 206 555 0100. (8) "ra-email" (OPTIONAL, multiple values allowed) contains an email address of the Registration Authority. (9) "ra-url" (OPTIONAL, multiple values allowed) contains a URL (as defined in RFC 3986 [RFC3986]) leading to more information about the RA (usually the website of the RA). (10) "ra-attribute" (OPTIONAL, multiple values allowed) contains attributes of the RA. An attribute MUST be one of the following values: "confidential" means that the information about the RA or part of it is confidential. "retired" means that the RA is defunct. If this attribute is set to the current RA, then the OID MUST have the attribute "frozen" (until the responsibility is transferred to a non-defunct RA, or until the current RA becomes active again). (11) "ra-created" (OPTIONAL) contains the date and time (as specified in section 3.4 "Date/Time Format") when the RA was created/registered in the database. (12) "ra-updated" (OPTIONAL) contains the date and time (as specified in section 3.4 "Date/Time Format") when the RA information was last modified. Additional fields can be defined by the OID-IP service, but they MUST begin with "ra-". The field names SHALL only consist of the lower- case letters "a..z", hyphens ("-"), and numbers, and SHOULD be written in the English language. The field name MUST NOT begin or end with a hyphen and a hyphen MUST NOT be followed by another hyphen. 3.2.4 Sections for Previous Registration Authorities To optionally display information about RAs that were previously in charge of managing the OID, a new section per RA can be added with the following field name prefixes: "ra-" is the prefix of the current Registration Authority. "ra1-" is the prefix of the first RA. It is the very first person or Marschall Expires April 4, 2022 [Page 13] INTERNET DRAFT OID Information Protocol October 1, 2021 company to whom the OID was allocated by the RA of the superior OID. "ra2-" is the prefix of the second RA, after the responsibility has been transferred. etc. The definition of these sections is identical to the definition of the RA-Section (described in section 3.2.3 "RA-Section"), just with a different prefix. The history does not need to be complete, e.g. it is no problem to only serve information about the first and the current RA, or only serve information about the current RA. 3.3 Digital Signature If integrity/authenticity is required, the whole response can be signed, e.g. by using S/MIME, RSA, or PGP. This document does not describe a mechanism for detecting which signature method was used. The creation and verification of the signature are therefore implementation-specific and no interoperability regarding signature creation and validation is given at this time. Depending on the signature method being used, various things need to be appended and/or prepended to the response. These additional lines MUST be prepended by a percent sign ("%") to avoid that an application confuses these additional lines (e.g. lines belonging to a PGP header, as defined in RFC 4880 [RFC4880]) with parts of the actual OID-IP response. 3.4 Date/Time Format Date/Time references SHALL be formatted as described in section 3.4.1. If parts of the date/time reference are uncertain, then they SHOULD be omitted until the date/time reference has the highest correctness. Examples of valid date/time references can be found in section 3.4.2. Marschall Expires April 4, 2022 [Page 14] INTERNET DRAFT OID Information Protocol October 1, 2021 3.4.1 Date/Time Format ABNF Notation To define the format of a Date/Time reference, the following Augmented BNF definitions will be used. They are based on the ABNF styles of RFC 5234 [RFC5234]. date-time = year [ "-" month [ "-" day [ " " time ] ] ] year = 4*4DIGIT month = ( "0" %x31-39 ) / ( "1" %x30-32 ) ; 01-12 day = ( "0" %x31-39 ) / ( "1" %x30-39 ) / ( "2" %x30-39 ) / ( "3" %x30-31 ) / ; 01-31 time = hour ":" minute [ ":" second ] [ " " timezone ] hour = ( "0" %x30-39 ) / ( "1" %x30-39 ) / ( "2" %x30-33 ) ; 00-23 minute = %x30-35 DIGIT ; 00-59 second = %x30-35 DIGIT ; 00-59 timezone = ( "+" / "-" ) hour minute 3.4.2 Date/Time Format Examples Examples of valid date/time references are: 2021-04-29 18:32:00 +0200 2021-04-29 18:32:00 2021-04-29 18:32 +0200 2021-04-29 18:32 2021-04-29 2021-04 2021 Marschall Expires April 4, 2022 [Page 15] INTERNET DRAFT OID Information Protocol October 1, 2021 4 Referral By using the field "oidip-service", the OID-IP service can instruct the client to query another OID-IP service that might have more information about the requested OID. If Registration Authorities maintain up-to-date OID-IP service references of their OID delegations, it is possible to automatically retrieve information about any OID. Example: OID "2.999" is owned by Registration Authority "A", operating an OID-IP service at "a.example.com". Registration Authority "A" allocated OID "2.999.1000" to Registration Authority "B" who is operating an OID-IP service at "b.example.com". The client asks a.example.com for information about OID "2.999.1000.1" and should receive the following reply: query: oid:2.999.1000.1 result: Not found; superior object found distance: 1 object: oid:2.999.1000 status: Information available name: Company "B" oidip-service: b.example.com:XXX ra: "B" ra-status: Information unavailable The client is now aware that "a.example.com" only knows OID "2.999.1000", and that there is a reference to another OID-IP service located at "b.example.com". So, the client should then accordingly query "b.example.com", asking for information about OID "2.999.1000.1": query: oid:2.999.1000.1 result: Found object: oid:2.999.1000.1 status: Information available name: Example OID 1 ra: "B" ra-status: Information unavailable Marschall Expires April 4, 2022 [Page 16] INTERNET DRAFT OID Information Protocol October 1, 2021 5 Full Example 5.1 Request oid:2.999 5.2 Response query: oid:2.999 result: Found object: oid:2.999 status: Information available name: Example description: This OID can be used by anyone, for the purposes of description: documenting examples of Object Identifiers. asn1-notation: {joint-iso-itu-t(2) example(999)} iri-notation: /Example identifier: example unicode-label: Beispiel unicode-label: Ejemplo unicode-label: Example unicode-label: Exemple unicode-label: (Korean characters are omitted in this example) unicode-label: (Arabian characters are omitted in this example) unicode-label: (Japanese characters are omitted in this example) unicode-label: (Chinese characters are omitted in this example) unicode-label: (Russian characters are omitted in this example) long-arc: Beispiel long-arc: Ejemplo long-arc: Example long-arc: Exemple long-arc: (Korean characters are omitted in this example) long-arc: (Arabian characters are omitted in this example) long-arc: (Japanese characters are omitted in this example) long-arc: (Chinese characters are omitted in this example) long-arc: (Russian characters are omitted in this example) parent: oid:2 (joint-iso-itu-t) created: 2011-06 updated: 2011-09 ra: ITU-T SG 17 & ISO/IEC JTC 1/SC 6 ra-status: Information unavailable % -----BEGIN RSA SIGNATURE----- % DwnqRtx/ONtPh4onXnrZPl9jF+G50RMLZkSwuClaoH2t/yK8CnYJrmzkzA5+gkfWkoQ % cq+J8J9cvnwXvBfpVHh+7lyNOVW1N016TYFcBt8MVxb6K2KhkKclqeA6wz0kSUuE4qR % ZohzrZBcCP7aLIpcaoVi6QACAt6J0vOvYBaf0= % -----END RSA SIGNATURE----- Marschall Expires April 4, 2022 [Page 17] INTERNET DRAFT OID Information Protocol October 1, 2021 6 Alternative Namespaces This document describes the retrieval of information about OIDs using the OID-IP protocol. In addition to the OID namespace, the methods described in this document can also be applied to other namespaces like "uuid", "isbn", "gtin" etc. Following things need to be considered if alternative namespaces are implemented: (1) The request MUST be UTF-8 encoded (as defined in RFC 3629 [RFC3629]), without Byte-Order-Mark (BOM). (2) The namespace SHALL be a namespace identifier (NID) as defined in RFC 8141 [RFC8141]. (3) The namespace identifier SHALL be written in lower-case (this is already defined in section 2 "Request"). (4) If available, a formal URN namespace identifier (as defined in RFC 8141, section 5.1 [RFC8141]) SHOULD be used, e.g. "uuid" should be used instead of "guid". (5) If things like "Owner", "Creator", "Manager", "Administrator", etc., are relevant to the identifiers in the namespace, then the RA- section as described in section 3.2.3 SHALL be used, even though the word "Registration Authority" might not be appropriate in the terminology of the namespace. (6) The namespace-specific identifier MUST NOT contain dollar signs ("$"), because section 2.1 "Authentication Tokens" defines them as a separator for authentication tokens. (7) The namespace-specific identifier MUST be treated case-sensitive if the namespace distinguishes between lower-case and upper-case. (8) Fields that can only be used in the OID namespace (e.g. "unicode- label") MUST NOT be used for other namespaces. Marschall Expires April 4, 2022 [Page 18] INTERNET DRAFT OID Information Protocol October 1, 2021 6.1 Example: UUID Namespace The following example shows the retrieval of information about Universally Unique Identifiers (e.g. UUIDs used by the Microsoft Common Object Model, also known as GUIDs). The UUID namespace has no hierarchical structure, which means that the OID-IP service can only respond with the result "Found", "Not found" or "Service error" and the fields "parent" and "subordinate" cannot be used. Request: uuid:b4bfcc3a-db2c-424c-b029-7fe99a87c641 Response: query: uuid:b4bfcc3a-db2c-424c-b029-7fe99a87c641 result: Found object: uuid:b4bfcc3a-db2c-424c-b029-7fe99a87c641 status: Information available name: Desktop information: GUID can be used in file dialogs as "Custom Place". ra: Microsoft Corp. ra-status: Information unavailable More information about UUIDs can be found in Recommendation ITU-T X.667 (2012) | ISO/IEC 9834-8:2014 [X667]. More information about the Microsoft Common Object Model (COM) can be found at Microsoft Docs . 7 Internationalization Considerations This document specifies that the request and response MUST be UTF-8 encoded (as defined in RFC 3629 [RFC3629]), without Byte-Order-Mark (BOM). The OID-IP service can define additional field names, but they SHOULD be written in the English language so that there is consistency with the field names defined in this document. Marschall Expires April 4, 2022 [Page 19] INTERNET DRAFT OID Information Protocol October 1, 2021 8 Security Considerations (1) The knowledge of existence or information about some OIDs could be considered confidential. In this case, the OID-IP service can either deny the existence of the requested OID (by setting the result to "Not found") or redact information in the Object-Section, as defined in section 3.2.2 "Object-Section". (2) Registration Authorities might demand that their data is kept confidential, or at least be partially redacted to increase privacy or as a measurement against spam. In this case, the OID-IP service can redact information in the RA-Section, as defined in section 3.2.3 "RA-Section". (3) The OID-IP service can decide if confidential material is omitted or shown, based on authentication mechanisms like white-listing client IP addresses or by using authentication tokens supplied by the client, as defined in section 2.1 "Authentication Tokens". (4) The usage of authentication tokens is not recommended if the traffic between client and server is transmitted through an untrusted network, because the OID-IP protocol is not encrypted. (5) Authentication tokens must have a sufficient length and complexity to avoid successful brute force attacks, or the OID-IP service must limit the number of requests per time. (6) The OID-IP protocol itself has no mechanism for verifying the integrity of data received. Due to this fact, the information should not be trusted if it is transmitted through an untrusted network. If integrity/authenticity is required, the OID-IP response can be signed, as described in section 3.3 "Digital Signature". However, this document does not describe a mechanism for detecting which signature method was used. Therefore, no interoperability of signature creation/validation is given at this time. Marschall Expires April 4, 2022 [Page 20] INTERNET DRAFT OID Information Protocol October 1, 2021 9 IANA Considerations 9.1 Port Numbers This document requires the assignment of a TCP port number. +--------------------+-----------------------------+ | Service Name | oidip | | Transport Protocol | TCP | | Assignee | ... | | Contact | ... | | Description | OID Information Protocol | | Reference | [RFCyyyy] | | Port Number | XXX | +--------------------+-----------------------------+ [Please change "yyyy" to the RFC number allocated to this document before publication.] [Please change "XXX" placed at various locations in this document to the port number allocated by IANA.] 10 References 10.1 Normative References [E164] "The international public telecommunication numbering plan", Recommendation ITU-T E.164 (2010), November 2010. . [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, DOI 10.17487/RFC2119, March 1997. . [RFC3061] Mealling, M., "A URN Namespace of Object Identifiers", RFC 3061, DOI 10.17487/RFC3061, February 2001. . [RFC3629] Yergeau, F., "UTF-8, a transformation format of ISO 10646", STD 63, RFC 3629, DOI 10.17487/RFC3629, November 2003. . [RFC3986] Berners-Lee, T., "Uniform Resource Identifier (URI): Generic Syntax", STD 66, RFC 3986, DOI 10.17487/RFC3986, Marschall Expires April 4, 2022 [Page 21] INTERNET DRAFT OID Information Protocol October 1, 2021 January 2005. . [RFC5234] Crocker, D. and P. Overell, "Augmented BNF for Syntax Specifications: ABNF", STD 68, RFC 5234, DOI 10.17487/RFC5234, January 2008. . [RFC8141] Saint-Andre, P., "Uniform Resource Names (URNs)", RFC 8141, DOI 10.17487/RFC8141, April 2017. . [X660] "Information technology - Procedures for the operation of object identifier registration authorities: General procedures and top arcs of the international object identifier tree", Recommendation ITU-T X.660 (2011) | ISO/IEC 9834-1:2012, July 2011. . [X680] "Information technology - Abstract Syntax Notation One (ASN.1): Specification of basic notation", Recommendation ITU-T X.680 (2015) | ISO/IEC 8824-1:2015, August 2015. . 10.2 Informative References [RFC1157] Case, J., Fedor, M., Schoffstall, M., Davin, J., "A Simple Network Management Protocol (SNMP)", RFC 1157, DOI 10.17487/RFC1157, May 1990. . [RFC4511] Sermersheim, J., "Lightweight Directory Access Protocol (LDAP): The Protocol", RFC 4511, DOI 10.17487/RFC4511, June 2006. . [RFC4880] Callas, J., Donnerhacke, L., Finney, H., Shaw, D., Thayer, R., "OpenPGP Message Format", RFC 4880, DOI 10.17487/RFC4880, November 2007. . [X509] "Information technology - Open Systems Interconnection - The Directory: Public-key and attribute certificate frameworks", Recommendation ITU-T X.509 (2016) | ISO/IEC 9594-8:2017, October 2016. . [X667] "Information technology - Procedures for the operation of Marschall Expires April 4, 2022 [Page 22] INTERNET DRAFT OID Information Protocol October 1, 2021 object identifier registration authorities: Generation of universally unique identifiers and their use in object identifiers", Recommendation ITU-T X.667 (2012) | ISO/IEC 9834-8:2014, October 2012. . [X672] "Information technology - Open systems interconnection - Object identifier resolution system", Recommendation ITU-T X.672 (2010) | ISO/IEC 29168-1:2011, August 2010. . Acknowledgements Olivier Dubuisson Authors' Addresses Daniel Marschall Postfach 11 53 69243 Bammental Germany EMail: daniel-marschall@viathinksoft.de Marschall Expires April 4, 2022 [Page 23]