Network Working Group DeKok, Alan INTERNET-DRAFT FreeRADIUS Updates: 2865,3162,6158,6572 Category: Standards Track 24 August 2016 Data Types in the Remote Authentication Dial-In User Service Protocol (RADIUS) Abstract RADIUS specifications have used data types for two decades without defining them as managed entities. During this time, RADIUS implementations have named the data types, and have used them in attribute definitions. This document updates the specifications to better follow established practice. We do this by naming the data types defined in RFC 6158, which have been used since at least the publication of RFC 2865. We provide an IANA registry for the data types, and update the RADIUS Attribute Type registry to include a "Data Type" field for each attribute. Finally, we recommend that authors of RADIUS specifications use these types in preference to existing practice. This document updates RFC 2865, 3162, 6158, and 6572. Status of this Memo This Internet-Draft is submitted to IETF in full conformance with the provisions of BCP 78 and BCP 79. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF), its areas, and its working groups. Note that other groups may also distribute working documents as Internet- Drafts. 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." The list of current Internet-Drafts can be accessed at http://www.ietf.org/ietf/1id-abstracts.txt. The list of Internet-Draft Shadow Directories can be accessed at http://www.ietf.org/shadow.html. This Internet-Draft will expire on April 24, 2017. DeKok, Alan Standards Track [Page 1] INTERNET-DRAFT Data Types in RADIUS 24 August 2016 Copyright Notice Copyright (c) 2016 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 (http://trustee.ietf.org/license-info/) in effect on the date of publication of this document. Please review these documents 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. DeKok, Alan Standards Track [Page 2] INTERNET-DRAFT Data Types in RADIUS 24 August 2016 Table of Contents 1. Introduction ............................................. 4 1.1. Specification Problems with Data Types .............. 4 1.2. Implementation Problems with Data Types ............. 5 1.3. No Mandated Changes ................................. 5 1.4. Requirements Language ............................... 5 2. Use of Data Types ........................................ 6 2.1. Specification Use of Data Types ..................... 6 2.1.1. Field Names for Attribute Values ............... 6 2.1.2. Attribute Definitions using Data Types ......... 7 2.1.3. Format of Attribute Definitions ................ 7 2.1.4. Defining a New Data Type ....................... 8 2.2. Implementation Use of Data Types .................... 9 3. Data Type Definitions .................................... 11 3.1. integer ............................................. 12 3.2. enum ................................................ 12 3.3. time ................................................ 13 3.4. text ................................................ 13 3.5. string .............................................. 14 3.6. concat .............................................. 16 3.7. ifid ................................................ 16 3.8. ipv4addr ............................................ 17 3.9. ipv6addr ............................................ 18 3.10. ipv6prefix ......................................... 18 3.11. ipv4prefix ......................................... 20 3.12. integer64 .......................................... 21 3.13. tlv ................................................ 22 3.14. vsa ................................................ 23 3.15. extended ........................................... 24 3.16. long-extended ...................................... 26 3.17. evs ................................................ 28 4. Updated Registries ....................................... 29 4.1. Create a Data Type Registry ......................... 29 4.2. Updates to the Attribute Type Registry .............. 30 5. Security Considerations .................................. 35 6. IANA Considerations ...................................... 36 7. References ............................................... 36 7.1. Normative References ................................ 36 7.2. Informative References .............................. 37 DeKok, Alan Standards Track [Page 3] INTERNET-DRAFT Data Types in RADIUS 24 August 2016 1. Introduction RADIUS specifications have historically defined attributes in terms of name, value, and data type. Of these three pieces of information, the name is recorded by IANA in the RADIUS Attribute Type registry, but not otherwise managed or restricted, as discussed in [RFC6929] Section 2.7.1. The value is managed by IANA, and recorded in that registry. The data type is not managed or recorded in the RADIUS Attribute Type registry. Experience has shown that there is a need to create well known data types, and have them managed by IANA. This document defines an IANA RADIUS Data Type registry, and updates the RADIUS Attribute Type registry to use those newly defined data types. It recommends how both specifications and implementations should use the data types. It extends the RADIUS Attribute Type registry to have a data type for each assigned attribute. In this section, we review the use of data types in specifications and implementations. Whe highlight ambiguities and inconsistencies. The rest of this document is devoted to resolving those problems. 1.1. Specification Problems with Data Types When attributes are defined in the specifications, the terms "Value" and "String" are used to refer to the contents of an attribute. However, these names are used recursively and inconsistently. We suggest that defining a field to recursively contain itself is problematic. A number of data type names and definitions are given in [RFC2865] Section 5, at the bottom of page 25. These data types are named and clearly defined. However, this practice was not continued in later specifications. Specifically, [RFC2865] defines attributes of data type "address" to carry IPv4 addresses. Despite this definition, [RFC3162] defines attributes of data type "Address" to carry IPv6 addresses. We suggest that the use of the word "address" to refer to disparate data types is problematic. Other failures are that [RFC3162] does not give a data type name and definition for the data types IPv6 address, Interface-Id, or IPv6 prefix. [RFC2869] defines Event-Timestamp to carry a time, but does not re-use the "time" data type defined in [RFC2865]. Instead, it just repeats the "time" definition. [RFC6572] defines multiple attributes which carry IPv4 prefixes. However, an "IPv4 prefix" data type is not named, defined as a data type, or called out as an addition to RADIUS. Further, [RFC6572] does not follow the DeKok, Alan Standards Track [Page 4] INTERNET-DRAFT Data Types in RADIUS 24 August 2016 recommendations of [RFC6158], and does not explain why it fails to follow those recommendations. These ambiguities and inconsistencies need to be resolved. 1.2. Implementation Problems with Data Types RADIUS implementations often use "dictionaries" to map attribute names to type values, and to define data types for each attribute. The data types in the dictionaries are defined by each implementation, but correspond to the "ad hoc" data types used in the specifications. In effect, implementations have seen the need for well-defined data types, and have created them. It is time for RADIUS specifications to follow this practice. 1.3. No Mandated Changes This document mandates no changes to any RADIUS implementation, past, present, or future. It instead documents existing practice, in order to simplify the process of writing RADIUS specifications, to clarify the interpretation of RADIUS standards, and to improve the communication between specification authors and IANA. This document suggests that implementations SHOULD use the data types defined here, in preference to any "ad hoc" data types currently in use. This suggestion should have minimal effect on implementations, as most "ad hoc" data types are compatible with the ones defined here. Any difference will typically be limited to the name of the data type. This document updates [RFC6158] to permit the data types defined in the "Data Type registry" as "basic data types", as per Section 2.1 of that document. The recommendations of [RFC6158] are otherwise unchanged. 1.4. Requirements Language 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 [RFC2119]. DeKok, Alan Standards Track [Page 5] INTERNET-DRAFT Data Types in RADIUS 24 August 2016 2. Use of Data Types The Data Types can be used in two places: specifications, and implementations. This section discusses both uses, and gives guidance on using the data types. 2.1. Specification Use of Data Types In this section, we give recommendations for how specifications should be written using data types. We first describe how attribute field names can be consistently named. We then describe how attribute definitions should use the data types, and deprecate the use of "ASCII art" for attribute definitions. We suggest a format for new attribute definitions. This format includes recommended fields, and suggestions for how those fields should be described. Finally, we make recommendations for how new data types should be defined. 2.1.1. Field Names for Attribute Values Previous specifications used inconsistent and conflicting names for the contents of RADIUS attributes. For example, the term "Value" is used in [RFC2865] Section 5 to define a field which carries the contents of attribute. It is then used in later sections as the sub- field of attribute contents. The result is that the field is defined as recursively containing itself. Similarly, "String" is used both as a data type, and as a sub-field of other data types. We correct this ambiguity by using context-specific names for various fields of attributes and data types. It then becomes clear that, for example, that a field called "VSA-Data" must contain different data than a field called "EVS-Data". Each new name is defined where it is used. We also define the following term: Attr-Data The "Value" field of an Attribute as defined in [RFC2865] Section 5. The contents of this field MUST be of a valid data type as defined in the RADIUS Data Type registry. We consistently use "Attr-Data" to refer to the contents of an attribute, instead of the more ambiguous name "Value". It is RECOMMENDED that new specifications follow this practice. We consistently use "Value" to refer to the contents of a data type, DeKok, Alan Standards Track [Page 6] INTERNET-DRAFT Data Types in RADIUS 24 August 2016 where that data type is simple. For example, an "integer" can have a "Value". In contrast, a Vendor-Specific attribute carries complex information, and thus cannot have a "Value". For data types which carry complex information, we name the fields based on the data type. For example, a Vendor-Specific attribute is defined to carry a "vsa" data type, and the contents of that data type are described herein as "VSA-Data". These terms are used in preference to the term "String", which was previously used in ambiguous ways. It is RECOMMENDED that future specifications use type-specific names, and the same naming scheme for new types. This use will maintain consistent definitions, and help to avoid ambiguities. 2.1.2. Attribute Definitions using Data Types New RADIUS specifications MUST define attributes using data types from the RADIUS Data Type registry. The specification may, of course, define a new data type and use it in the same document. The guidelines given in [RFC6929] MUST be followed when defining a new data type. Attributes can usually be completely described via the Attribute Type value, name, and data type. The use of "ASCII art" is then limited only to the definition of new data types, and for complex data types. Use of the new extended attributes [RFC6929] makes ASCII art even more problematic. An attribute can be allocated from any of the extended spaces, with more than one option for attribute header format. This allocation decision is made after the specification has been accepted for publication. As the allocation affects the format of the attribute header, it is essentially impossible to create the correct ASCII art prior to final publication. Allocation from the different spaces also changes the value of the Length field, also making it difficult to define it correctly prior to final publication of the document. It is therefore RECOMMENDED that "ASCII art" diagrams not be used for new RADIUS attribute specifications. 2.1.3. Format of Attribute Definitions When defining a new attribute, the following fields SHOULD be given: Description DeKok, Alan Standards Track [Page 7] INTERNET-DRAFT Data Types in RADIUS 24 August 2016 A description of the meaning and interpretation of the attribute. Type The Attribute Type value, given in the "dotted number" notation from [RFC6929]. Specifications can often leave this as "TBD", and request that IANA fill in the allocated values. Length A description of the length of the attribute. For attributes of variable length, a maximum length SHOULD be given. Since the Length may depend on the Type, the definition of Length may be affected by IANA allocations. Data Type One of the named data types from the RADIUS Data Type registry. Value A description of any attribute-specific limitations on the values carried by the specified data type. If there are no attribute-specific limitations, then the description of this field can be omitted, so long as the Description field is sufficiently explanatory. Where the values are limited to a subset of the possible range, valid range(s) MUST be defined. For attributes of data type "enum", a list of enumerated values and names MUST be given, as with [RFC2865] Section 5.6. Using a consistent format for attribute definitions helps to make the definitions clearer. 2.1.4. Defining a New Data Type When a specification needs to define a new data type, it SHOULD follow the format used by the definitions in Section 3 of this document. The text at the start of the data type definition MUST describe the data type, including the expected use, and why a new data type is required. That text SHOULD include limits on expected values, and why those limits exist. The field's "Name", "Value", "Length", and "Format", MUST be given, along with values. The "Name" field SHOULD be a single name, all lower-case. DeKok, Alan Standards Track [Page 8] INTERNET-DRAFT Data Types in RADIUS 24 August 2016 Contractions such as "ipv4addr" are RECOMMENDED where they add clarity. We note that the use of "Value" in the RADIUS Data Type registry can be confusing. That name is also used in attribute definitions, but with a different meaning. We trust that the meaning here is clear from the context. The "Value" field SHOULD be given as to be determined or "TBD" in specifications. That number is assigned by IANA. The "Format" field SHOULD be defined with "ASCII art" in order to have a precise definition. Machine-readable formats are also RECOMMENDED. The definition of a new data type should be done only when absolutely necessary. We do not expect a need for a large number of new data types. When defining a new data type, the guideliness of [RFC6929] with respect to data types MUST be followed. It is RECOMMENDED that vendors not define "vendor specific" data types. As discussed in [RFC6929], those data types are rarely necessary, and can cause interoperability problems. Any new data type MUST have unique name in the RADIUS Data Type registry. The number of the data type will be assigned by IANA. 2.2. Implementation Use of Data Types Implementations not supporting a particular data type MUST treat attributes of that data type as being of data type "string", as defined in Section 3.6. It is RECOMMENDED that such attributes be treated as "invalid attributes", as defined in [RFC6929] Section 2.8. Where the contents of a data type do not match the definition, implementations MUST treat the the enclosing attribute as being an "invalid attribute". This requirement includes, but is not limited to, the following situations: * Attributes with values outside of the allowed range(s) for the data type, e.g. as given in the data types "integer", "ipv4addr", "ipv6addr", "ipv4prefix", "ipv6prefix", or "enum". * "text" attributes where the contents do not match the required format, * Attributes where the length is shorter or longer than the allowed length(s) for the given data type, DeKok, Alan Standards Track [Page 9] INTERNET-DRAFT Data Types in RADIUS 24 August 2016 The requirements for "reserved" fields are more difficult to quantify. Implementations SHOULD be able to receive and process attributes where "reserved" fields are non-zero. We do not, however, define any "correct" processing of such attributes. Instead, specifications which define new meaning for "reserved" fields SHOULD describe how the new meaning is compatible with older implementations. We expect that such descriptions are derived from practice. Implementations MUST set "reserved" fields to zero when creating attributes. DeKok, Alan Standards Track [Page 10] INTERNET-DRAFT Data Types in RADIUS 24 August 2016 3. Data Type Definitions This section defines the new data types. For each data type, it gives a definition, a name, a number, a length, and an encoding format. Where relevant, it describes subfields contained within the data type. These definitions have no impact on existing RADIUS implementations. There is no requirement that implementations use these names. Where possible, the name of each data type has been taken from previous specifications. In some cases, a different name has been chosen. The change of name is sometimes required to avoid ambiguity (i.e. "address" versus "Address"). Otherwise, the new name has been chosen to be compatible with [RFC2865], or with use in common implementations. In some cases, new names are chosen to clarify the interpretation of the data type. The numbers assigned herein for the data types have no meaning other than to permit them to be tracked by IANA. As RADIUS does not encode information about data types in a packet, the numbers assigned to a data type will never occur in a packet. It is RECOMMENDED that new implementations use the names defined in this document, in order to avoid confusion. Existing implementations may choose to use the names defined here, but that is not required. The encoding of each data type is taken from previous specifications. The fields are transmitted from left to right. Where the data types have inter-dependencies, the simplest data type is given first, and dependent ones are given later. We do not create specific data types for the "tagged" attributes defined in [RFC2868]. That specification defines the "tagged" attributes as being backwards compatible with pre-existing data types. In addition, [RFC6158] Section 2.1 says that "tagged" attributes should not be used. There is therefore no benefit to defining additional data types for these attributes. We trust that implementors will be aware that tagged attributes must be treated differently from non-tagged attributes of the same data type. Similarly, we do not create data types for some attributes having complex structure, such as CHAP-Password, ARAP-Features, or Location- Information. We need to strike a balance between correcting earlier mistakes, and making this document more complex. In some cases, it is better to treat complex attributes as being of type "string", even though they need to be interpreted by RADIUS implementations. The guidelines given in Section 6.3 of [RFC6929] were used to make this determination. DeKok, Alan Standards Track [Page 11] INTERNET-DRAFT Data Types in RADIUS 24 August 2016 3.1. integer The "integer" data type encodes a 32-bit unsigned integer in network byte order. Where the range of values for a particular attribute is limited to a sub-set of the values, specifications MUST define the valid range. Attributes with Values outside of the allowed ranges SHOULD be treated as "invalid attributes". Name integer Value 1 Length Four octets Format 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Value | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 3.2. enum The "enum" data type encodes a 32-bit unsigned integer in network byte order. It differs from the "integer" data type only in that it is used to define enumerated types, such as Service-Type (Section 5.6 of [RFC2865]). Specifications MUST define a valid set of enumerated values, along with a unique name for each value. Attributes with Values outside of the allowed enumerations SHOULD be treated as "invalid attributes". Name enum Value 2 Length DeKok, Alan Standards Track [Page 12] INTERNET-DRAFT Data Types in RADIUS 24 August 2016 Four octets Format 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Value | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 3.3. time The "time" data type encodes time as a 32-bit unsigned value in network byte order and in seconds since 00:00:00 UTC, January 1, 1970. We note that dates before the year 2016 are likely to indicate configuration errors, or lack of access to the correct time. Note that the "time" attribute is defined to be unsigned, which means it is not subject to a signed integer overflow in the year 2038. Name time Value 3 Length Four octets Format 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Time | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 3.4. text The "text" data type encodes UTF-8 text [RFC3629]. The maximum length of the text is given by the encapsulating attribute. Where the range of lengths for a particular attribute is limited to a sub- set of possible lengths, specifications MUST define the valid DeKok, Alan Standards Track [Page 13] INTERNET-DRAFT Data Types in RADIUS 24 August 2016 range(s). Attributes with length outside of the allowed values SHOULD be treated as "invalid attributes". Attributes of type "text" which are allocated in the standard space (Section 1.2 of [RFC6929]) are limited to no more than 253 octets of data. Attributes of type "text" which are allocated in the extended space can be longer. In both cases, these limits are reduced when the data is encapsulated inside of an another attribute. Where the text is intended to carry data in a particular format, (e.g. Framed-Route), the format MUST be given. The specification SHOULD describe the format in a machine-readable way, such as via Augmented Backus-Naur Form (ABNF) [RFC5234]. Attributes with values not matching the defined format SHOULD be treated as "invalid attributes". Note that the "text" data type does not terminate with a NUL octet (hex 00). The Attribute has a Length field and does not use a terminator. Texts of length zero (0) MUST NOT be sent; omit the entire attribute instead. Name text Value 4 Length One or more octets. Format 0 0 1 2 3 4 5 6 7 +-+-+-+-+-+-+-+- | Value ... +-+-+-+-+-+-+-+- 3.5. string The "string" data type encodes binary data, as a sequence of undistinguished octets. Where the range of lengths for a particular attribute is limited to a sub-set of possible lengths, specifications MUST define the valid range(s). Attributes with length outside of DeKok, Alan Standards Track [Page 14] INTERNET-DRAFT Data Types in RADIUS 24 August 2016 the allowed values SHOULD be treated as "invalid attributes". Attributes of type "string" which are allocated in the standard space (Section 1.2 of [RFC6929]) are limited to no more than 253 octets of data. Attributes of type "string" which are allocated in the extended space can be longer. In both cases, these limits are reduced when the data is encapsulated inside of an another attribute. Note that the "string" data type does not terminate with a NUL octet (hex 00). The Attribute has a Length field and does not use a terminator. Strings of length zero (0) MUST NOT be sent; omit the entire attribute instead. a Where there is a need to encapsulate complex data structures, and TLVs cannot be used, the "string" data type MUST be used. This requirement includes encapsulation of data structures defined outside of RADIUS, which are opaque to the RADIUS infrastucture. It also includes encapsulation of some data structures which are not opaque to RADIUS, such as the contents of CHAP-Password. There is little reason to define a new RADIUS data type for only one attribute. However, where the complex data type cannot be represented as TLVs, and is expected to be used in many attributes, a new data type SHOULD be defined. These requirements are stronger than [RFC6158], which makes the above encapsulation a "SHOULD". This document defines data types for use in RADIUS, so there are few reasons to avoid using them. Name string Value 5 Length One or more octets. Format 0 0 1 2 3 4 5 6 7 +-+-+-+-+-+-+-+- | Octets ... +-+-+-+-+-+-+-+- DeKok, Alan Standards Track [Page 15] INTERNET-DRAFT Data Types in RADIUS 24 August 2016 3.6. concat The "concat" data type permits the transport of more than 253 octets of data in a "standard space" [RFC6929] attribute. It is otherwise identical to the "string" data type. If multiple attributes of this data type are contained in a packet, all attributes of the same type code MUST be in order and they MUST be consecutive attributes in the packet. The amount of data transported in a "concat" data type can be no more than the RADIUS packet size. In practice, the requirement to transport multiple attributes means that the limit may be substantially smaller than one RADIUS packet. As a rough guide, is RECOMMENDED that this data type transport no more than 2048 octets of data. The "concat" data type MAY be used for "standard space" attributes. It MUST NOT be used for attributes in the "short extended space" or the "long extended space". It MUST NOT be used in any field or subfields of the following data types: "tlv", "vsa", "extended", "long-extended", or "evs". Name concat Value 6 Length One or more octets. Format 0 0 1 2 3 4 5 6 7 +-+-+-+-+-+-+-+- | Octets ... +-+-+-+-+-+-+-+- 3.7. ifid The "ifid" data type encodes an Interface-Id as an 8 octet IPv6 Interface Identifier network byte order. DeKok, Alan Standards Track [Page 16] INTERNET-DRAFT Data Types in RADIUS 24 August 2016 Name ifid Value 7 Length Eight octets Format 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Interface-ID ... +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ ... Interface-ID | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 3.8. ipv4addr The "ipv4addr" data type encodes an IPv4 address in network byte order. Where the range of address for a particular attribute is limited to a sub-set of possible addresses, specifications MUST define the valid range(s). Attributes with Addresses outside of the allowed range(s) SHOULD be treated as "invalid attributes". Name ipv4addr Value 8 Length Four octets Format 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ DeKok, Alan Standards Track [Page 17] INTERNET-DRAFT Data Types in RADIUS 24 August 2016 | Address | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 3.9. ipv6addr The "ipv6addr" data type encodes an IPv6 address in network byte order. Where the range of address for a particular attribute is limited to a sub-set of possible addresses, specifications MUST define the valid range(s). Attributes with Addresses outside of the allowed range(s) SHOULD be treated as "invalid attributes". Name ipv6addr Value 9 Length Sixteen octets Format 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Address ... +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ ... Address ... +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ ... Address ... +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ ... Address | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 3.10. ipv6prefix The "ipv6prefix" data type encodes an IPv6 prefix, using both a prefix length and an IPv6 address in network byte order. Where the range of prefixes for a particular attribute is limited to a sub-set of possible prefixes, specifications MUST define the valid range(s). Attributes with Addresses outside of the allowed range(s) SHOULD be treated as "invalid attributes". DeKok, Alan Standards Track [Page 18] INTERNET-DRAFT Data Types in RADIUS 24 August 2016 Attributes with a Prefix-Length field having value greater than 128 MUST be treated as "invalid attributes". Name ipv6prefix Value 10 Length At least two, and no more than eighteen octets. Format 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Reserved | Prefix-Length | Prefix ... +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ ... Prefix ... +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ ... Prefix ... +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ ... Prefix | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ Subfields Reserved This field, which is reserved and MUST be present, is always set to zero. Prefix-Length The length of the prefix, in bits. At least 0 and no larger than 128. Prefix The Prefix field is up to 16 octets in length. Bits outside of the Prefix-Length, if included, MUST be zero. The Prefix field SHOULD NOT contain more octets than necessary to encode the Prefix. DeKok, Alan Standards Track [Page 19] INTERNET-DRAFT Data Types in RADIUS 24 August 2016 3.11. ipv4prefix The "ipv4prefix" data type encodes an IPv4 prefix, using both a prefix length and an IPv4 address in network byte order. Where the range of prefixes for a particular attribute is limited to a sub-set of possible prefixes, specifications MUST define the valid range(s). Attributes with Addresses outside of the allowed range(s) SHOULD be treated as "invalid attributes". Attributes with a Prefix-Length field having value greater than 32 MUST be treated as "invalid attributes". Name ipv4prefix Value 11 Length six octets Format 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Reserved | Prefix-Length | Prefix ... +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ ... Prefix | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ Subfields Reserved This field, which is reserved and MUST be present, is always set to zero. This field is one octet in length. Note that this definition differs from that given in [RFC6572]. See Prefix-Length, below, for an explanation. Prefix-Length The length of the prefix, in bits. The values MUST be no larger than 32. This field is one octet in length. DeKok, Alan Standards Track [Page 20] INTERNET-DRAFT Data Types in RADIUS 24 August 2016 Note that this definition differs from that given in [RFC6572]. As compared to [RFC6572], the Prefix-Length field has increased in size by two bits, both of which must be zero. The Reserved field has decreased in size by two bits. The result is that both fields are aligned on octet boundaries, which removes the need for bit masking of the fields. Since [RFC6572] required the Reserved field to be zero, the definition here is compatible with the definition in the original specification. Prefix The Prefix field is 4 octets in length. Bits outside of the Prefix-Length MUST be zero. Unlike the "ipv6prefix" data type, this field is fixed length. If the address is all zeros (i.e. "0.0.0.0", then the Prefix-Length MUST be set to 32. 3.12. integer64 The "integer64" data type encodes a 64-bit unsigned integer in network byte order. Where the range of values for a particular attribute is limited to a sub-set of the values, specifications MUST define the valid range(s). Attributes with Values outside of the allowed range(s) SHOULD be treated as "invalid attributes". Name integer64 Value 12 Length Eight octets Format 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Value ... +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ ... Value | DeKok, Alan Standards Track [Page 21] INTERNET-DRAFT Data Types in RADIUS 24 August 2016 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 3.13. tlv The "tlv" data type encodes a type-length-value, as defined in [RFC6929] Section 2.3. Name tlv Value 13 Length Three or more octets Format 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | TLV-Type | TLV-Length | TLV-Data ... +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ Subfields TLV-Type This field is one octet. Up-to-date values of this field are specified according to the policies and rules described in [RFC6929] Section 10. Values of 254-255 are "Reserved" for use by future extensions to RADIUS. The value 26 has no special meaning, and MUST NOT be treated as a Vendor Specific attribute. The TLV-Type is meaningful only within the context defined by "Type" fields of the encapsulating Attributes, using the dotted-number notation introduced in [RFC6929]. A RADIUS server MAY ignore Attributes with an unknown "TLV- Type". A RADIUS client MAY ignore Attributes with an unknown "TLV- Type". DeKok, Alan Standards Track [Page 22] INTERNET-DRAFT Data Types in RADIUS 24 August 2016 A RADIUS proxy SHOULD forward Attributes with an unknown "TLV- Type" verbatim. TLV-Length The TLV-Length field is one octet, and indicates the length of this TLV including the TLV-Type, TLV-Length and TLV-Value fields. It MUST have a value between 3 and 255. If a client or server receives a TLV with an invalid TLV-Length, then the attribute which encapsulates that TLV MUST be considered to be an "invalid attribute", and handled as per [RFC6929] Section 2.8. TLVs having TLV-Length of two (2) MUST NOT be sent; omit the entire TLV instead. TLV-Data The TLV-Data field is one or more octets and contains information specific to the Attribute. The format and length of the TLV-Data field is determined by the TLV-Type and TLV- Length fields. The TLV-Data field MUST contain only known RADIUS data types. The TLV-Data field MUST NOT contain any of the following data types: "concat", "vsa", "extended", "long-extended", or "evs". 3.14. vsa The "vsa" data type encodes Vendor-Specific data, as given in [RFC2865] Section 5.26. It is used only in the Attr-Data field of a Vendor-Specific Attribute. It MUST NOT appear in the contents of any other data type. Where an implementation determines that an attribute of data type "vsa" contains data which does not match the expected format, it SHOULD treat that attribute as being an "invalid attribute". Name vsa Value 14 Length DeKok, Alan Standards Track [Page 23] INTERNET-DRAFT Data Types in RADIUS 24 August 2016 Five or more octets Format 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Vendor-Id | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | VSA-Data .... +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ Subfields Vendor-Id The 4 octets are the Network Management Private Enterprise Code [PEN] of the Vendor in network byte order. VSA-Data The VSA-Data field is one or more octets. The actual format of the information is site or application specific, and a robust implementation SHOULD support the field as undistinguished octets. The codification of the range of allowed usage of this field is outside the scope of this specification. The "vsa" data type SHOULD contain as a sequence of "tlv" data types. The interpretation of the TLV-Type and TLV-Data fields are dependent on the vendor's definition of that attribute. The "vsa" data type MUST be used as contents of the Attr-Data field of the Vendor-Specific attribute. The "vsa" data type MUST NOT appear in the contents of any other data type. 3.15. extended The "extended" data type encodes the "Extended Type" format, as given in [RFC6929] Section 2.1. It is used only in the Attr-Data field of an Attribute allocated from the "standard space". It MUST NOT appear in the contents of any other data type. Name extended DeKok, Alan Standards Track [Page 24] INTERNET-DRAFT Data Types in RADIUS 24 August 2016 Value 15 Length Two or more octets Format 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Extended-Type | Ext-Data ... +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ Subfields Extended-Type The Extended-Type field is one octet. Up-to-date values of this field are specified according to the policies and rules described in [RFC6929] Section 10. Unlike the Type field defined in [RFC2865] Section 5, no values are allocated for experimental or implementation-specific use. Values 241-255 are reserved and MUST NOT be used. The Extended-Type is meaningful only within a context defined by the Type field. That is, this field may be thought of as defining a new type space of the form "Type.Extended-Type". See [RFC6929] Section 2.5 for additional discussion. A RADIUS server MAY ignore Attributes with an unknown "Type.Extended-Type". A RADIUS client MAY ignore Attributes with an unknown "Type.Extended-Type". Ext-Data The contents of this field MUST be a valid data type as defined in the RADIUS Data Type registry. The Ext-Data field MUST NOT contain any of the following data types: "concat", "vsa", "extended", "long-extended", or "evs". The Ext-Data field is one or more octets. Implementations supporting this specification MUST use the DeKok, Alan Standards Track [Page 25] INTERNET-DRAFT Data Types in RADIUS 24 August 2016 Identifier of "Type.Extended-Type" to determine the interpretation of the Ext-Data field. 3.16. long-extended The "long-extended" data type encodes the "Long Extended Type" format, as given in [RFC6929] Section 2.2. It is used only in the Attr-Data field of an Attribute. It MUST NOT appear in the contents of any other data type. Name long-extended Value 16 Length Three or more octets Format 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Extended-Type |M| Reserved | Ext-Data ... +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ Subfields Extended-Type This field is identical to the Extended-Type field defined above in Section 3.15. M (More) The More field is one (1) bit in length, and indicates whether or not the current attribute contains "more" than 251 octets of data. The More field MUST be clear (0) if the Length field has value less than 255. The More field MAY be set (1) if the Length field has value of 255. If the More field is set (1), it indicates that the Ext-Data field has been fragmented across multiple RADIUS attributes. DeKok, Alan Standards Track [Page 26] INTERNET-DRAFT Data Types in RADIUS 24 August 2016 When the More field is set (1), the attribute MUST have a Length field of value 255; there MUST be an attribute following this one; and the next attribute MUST have both the same Type and Extended Type. That is, multiple fragments of the same value MUST be in order and MUST be consecutive attributes in the packet, and the last attribute in a packet MUST NOT have the More field set (1). That is, a packet containing a fragmented attribute needs to contain all fragments of the attribute, and those fragments need to be contiguous in the packet. RADIUS does not support inter-packet fragmentation, which means that fragmenting an attribute across multiple packets is impossible. If a client or server receives an attribute fragment with the "More" field set (1), but for which no subsequent fragment can be found, then the fragmented attribute is considered to be an "invalid attribute", and handled as per [RFC6929] Section 2.8. Reserved This field is 7 bits long, and is reserved for future use. Implementations MUST set it to zero (0) when encoding an attribute for sending in a packet. The contents SHOULD be ignored on reception. Future specifications may define additional meaning for this field. Implementations therefore MUST NOT treat this field as invalid if it is non-zero. Ext-Data The contents of this field MUST be a valid data type as defined in the RADIUS Data Type registry. The Ext-Data field MUST NOT contain any of the following data types: "concat", "vsa", "extended", "long-extended", or "evs". The Ext-Data field is one or more octets. Implementations supporting this specification MUST use the Identifier of "Type.Extended-Type" to determine the interpretation of the Ext-Data field. The length of the data MUST be taken as the sum of the lengths of the fragments (i.e. Ext-Data fields) from which it is constructed. Any interpretation of the resulting data MUST occur after the fragments have been reassembled. If the reassembled data does not match the expected format, each DeKok, Alan Standards Track [Page 27] INTERNET-DRAFT Data Types in RADIUS 24 August 2016 fragment MUST be treated as an "invalid attribute", and the reassembled data MUST be discarded. We note that the maximum size of a fragmented attribute is limited only by the RADIUS packet length limitation. Implementations MUST be able to handle the case where one fragmented attribute completely fills the packet. 3.17. evs The "evs" data type encodes an "Extended Vendor-Specific" attribute, as given in [RFC6929] Section 2.4. The "evs" data type is used solely to extend the Vendor Specific space. It MAY appear inside of an "extended" or a "long-extended" data type. It MUST NOT appear in the contents of any other data type. Where an implementation determines that an attribute of data type "evs" contains data which does not match the expected format, it SHOULD treat that attribute as being an "invalid attribute". Name evs Value 17 Length Six or more octets Format 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Vendor-Id | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Vendor-Type | EVS-Data .... +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ Subfields Vendor-Id The 4 octets are the Network Management Private Enterprise Code DeKok, Alan Standards Track [Page 28] INTERNET-DRAFT Data Types in RADIUS 24 August 2016 [PEN] of the Vendor in network byte order. Vendor-Type The Vendor-Type field is one octet. Values are assigned at the sole discretion of the Vendor. EVS-Data The EVS-Data field is one or more octets. It SHOULD encapsulate a previously defined RADIUS data type. Non- standard data types SHOULD NOT be used. We note that the EVS- Data field may be of data type "tlv". The actual format of the information is site or application specific, and a robust implementation SHOULD support the field as undistinguished octets. We recognise that Vendors have complete control over the contents and format of the Ext-Data field, while at the same time recommending that good practices be followed. Further codification of the range of allowed usage of this field is outside the scope of this specification. 4. Updated Registries This section defines a new IANA registry for RADIUS data types, and then updates the existing RADIUS Attribute Type registry to use the data types from the new registry. 4.1. Create a Data Type Registry This section defines a new registry located under "RADIUS Types", called "Data Type". Allocation in this registry requires IETF Review. The "Registration Procedures" for the Data Type registry are "Standards Action". The Data Type registry contains three columns of data, as follows. Value The number of the data type. The value field is an artifact of the registry, and has no on-the-wire meaning. Description The name of the data type. The name field is used only for the DeKok, Alan Standards Track [Page 29] INTERNET-DRAFT Data Types in RADIUS 24 August 2016 registry, and has no on-the-wire meaning. Reference The specification where the data type was defined. The initial contents of the registry are as follows. Value Description Reference ----- ----------- ---------------- 1 integer [RFC2865], TBD 2 enum [RFC2865], TBD 3 time [RFC2865], TBD 4 text [RFC2865], TBD 5 string [RFC2865], TBD 6 concat TBD 7 ifid [RFC3162], TBD 8 ipv4addr [RFC2865], TBD 9 ipv6addr [RFC3162], TBD 10 ipv6prefix [RFC3162], TBD 11 ipv4prefix [RFC6572], TBD 12 integer64 [RFC6929], TBD 13 tlv [RFC6929], TBD 14 evs [RFC6929], TBD 15 extended [RFC6929], TBD 16 long-extended [RFC6929], TBD 4.2. Updates to the Attribute Type Registry This section updates the RADIUS Attribute Type registry to have a new column, which is inserted in between the existing "Description" and "Reference" columns. The new column is named "Data Type". The contents of that column are the name of a data type, corresponding to the attribute in that row, or blank if the attribute type is unassigned. The name of the data type is taken from the RADIUS Data Type registry, as defined above. The existing registration requirements for the RADIUS Attribute Type registry are otherwise unchanged. NOTE TO RFC EDITOR: Before the document is published, please remove this note, and the following text in this section. The updated registry follows in CSV format. Value,Description,Data Type,Reference 1,User-Name,text,[RFC2865] 2,User-Password,string,[RFC2865] DeKok, Alan Standards Track [Page 30] INTERNET-DRAFT Data Types in RADIUS 24 August 2016 3,CHAP-Password,string,[RFC2865] 4,NAS-IP-Address,ipv4addr,[RFC2865] 5,NAS-Port,integer,[RFC2865] 6,Service-Type,enum,[RFC2865] 7,Framed-Protocol,enum,[RFC2865] 8,Framed-IP-Address,ipv4addr,[RFC2865] 9,Framed-IP-Netmask,ipv4addr,[RFC2865] 10,Framed-Routing,enum,[RFC2865] 11,Filter-Id,text,[RFC2865] 12,Framed-MTU,integer,[RFC2865] 13,Framed-Compression,enum,[RFC2865] 14,Login-IP-Host,ipv4addr,[RFC2865] 15,Login-Service,enum,[RFC2865] 16,Login-TCP-Port,integer,[RFC2865] 17,Unassigned,, 18,Reply-Message,text,[RFC2865] 19,Callback-Number,text,[RFC2865] 20,Callback-Id,text,[RFC2865] 21,Unassigned,, 22,Framed-Route,text,[RFC2865] 23,Framed-IPX-Network,ipv4addr,[RFC2865] 24,State,string,[RFC2865] 25,Class,string,[RFC2865] 26,Vendor-Specific,vsa,[RFC2865] 27,Session-Timeout,integer,[RFC2865] 28,Idle-Timeout,integer,[RFC2865] 29,Termination-Action,enum,[RFC2865] 30,Called-Station-Id,text,[RFC2865] 31,Calling-Station-Id,text,[RFC2865] 32,NAS-Identifier,text,[RFC2865] 33,Proxy-State,string,[RFC2865] 34,Login-LAT-Service,text,[RFC2865] 35,Login-LAT-Node,text,[RFC2865] 36,Login-LAT-Group,string,[RFC2865] 37,Framed-AppleTalk-Link,integer,[RFC2865] 38,Framed-AppleTalk-Network,integer,[RFC2865] 39,Framed-AppleTalk-Zone,text,[RFC2865] 40,Acct-Status-Type,enum,[RFC2866] 41,Acct-Delay-Time,integer,[RFC2866] 42,Acct-Input-Octets,integer,[RFC2866] 43,Acct-Output-Octets,integer,[RFC2866] 44,Acct-Session-Id,text,[RFC2866] 45,Acct-Authentic,enum,[RFC2866] 46,Acct-Session-Time,integer,[RFC2866] 47,Acct-Input-Packets,integer,[RFC2866] 48,Acct-Output-Packets,integer,[RFC2866] 49,Acct-Terminate-Cause,enum,[RFC2866] 50,Acct-Multi-Session-Id,text,[RFC2866] DeKok, Alan Standards Track [Page 31] INTERNET-DRAFT Data Types in RADIUS 24 August 2016 51,Acct-Link-Count,integer,[RFC2866] 52,Acct-Input-Gigawords,integer,[RFC2869] 53,Acct-Output-Gigawords,integer,[RFC2869] 54,Unassigned,, 55,Event-Timestamp,time,[RFC2869] 56,Egress-VLANID,integer,[RFC4675] 57,Ingress-Filters,enum,[RFC4675] 58,Egress-VLAN-Name,text,[RFC4675] 59,User-Priority-Table,string,[RFC4675] 60,CHAP-Challenge,string,[RFC2865] 61,NAS-Port-Type,enum,[RFC2865] 62,Port-Limit,integer,[RFC2865] 63,Login-LAT-Port,text,[RFC2865] 64,Tunnel-Type,enum,[RFC2868] 65,Tunnel-Medium-Type,enum,[RFC2868] 66,Tunnel-Client-Endpoint,text,[RFC2868] 67,Tunnel-Server-Endpoint,text,[RFC2868] 68,Acct-Tunnel-Connection,text,[RFC2867] 69,Tunnel-Password,string,[RFC2868] 70,ARAP-Password,string,[RFC2869] 71,ARAP-Features,string,[RFC2869] 72,ARAP-Zone-Access,enum,[RFC2869] 73,ARAP-Security,integer,[RFC2869] 74,ARAP-Security-Data,text,[RFC2869] 75,Password-Retry,integer,[RFC2869] 76,Prompt,enum,[RFC2869] 77,Connect-Info,text,[RFC2869] 78,Configuration-Token,text,[RFC2869] 79,EAP-Message,concat,[RFC2869] 80,Message-Authenticator,string,[RFC2869] 81,Tunnel-Private-Group-ID,text,[RFC2868] 82,Tunnel-Assignment-ID,text,[RFC2868] 83,Tunnel-Preference,integer,[RFC2868] 84,ARAP-Challenge-Response,string,[RFC2869] 85,Acct-Interim-Interval,integer,[RFC2869] 86,Acct-Tunnel-Packets-Lost,integer,[RFC2867] 87,NAS-Port-Id,text,[RFC2869] 88,Framed-Pool,text,[RFC2869] 89,CUI,string,[RFC4372] 90,Tunnel-Client-Auth-ID,text,[RFC2868] 91,Tunnel-Server-Auth-ID,text,[RFC2868] 92,NAS-Filter-Rule,text,[RFC4849] 93,Unassigned,, 94,Originating-Line-Info,string,[RFC7155] 95,NAS-IPv6-Address,ipv6addr,[RFC3162] 96,Framed-Interface-Id,ifid,[RFC3162] 97,Framed-IPv6-Prefix,ipv6prefix,[RFC3162] 98,Login-IPv6-Host,ipv6addr,[RFC3162] DeKok, Alan Standards Track [Page 32] INTERNET-DRAFT Data Types in RADIUS 24 August 2016 99,Framed-IPv6-Route,text,[RFC3162] 100,Framed-IPv6-Pool,text,[RFC3162] 101,Error-Cause Attribute,enum,[RFC3576] 102,EAP-Key-Name,string,[RFC4072][RFC7268] 103,Digest-Response,text,[RFC5090] 104,Digest-Realm,text,[RFC5090] 105,Digest-Nonce,text,[RFC5090] 106,Digest-Response-Auth,text,[RFC5090] 107,Digest-Nextnonce,text,[RFC5090] 108,Digest-Method,text,[RFC5090] 109,Digest-URI,text,[RFC5090] 110,Digest-Qop,text,[RFC5090] 111,Digest-Algorithm,text,[RFC5090] 112,Digest-Entity-Body-Hash,text,[RFC5090] 113,Digest-CNonce,text,[RFC5090] 114,Digest-Nonce-Count,text,[RFC5090] 115,Digest-Username,text,[RFC5090] 116,Digest-Opaque,text,[RFC5090] 117,Digest-Auth-Param,text,[RFC5090] 118,Digest-AKA-Auts,text,[RFC5090] 119,Digest-Domain,text,[RFC5090] 120,Digest-Stale,text,[RFC5090] 121,Digest-HA1,text,[RFC5090] 122,SIP-AOR,text,[RFC5090] 123,Delegated-IPv6-Prefix,ipv6prefix,[RFC4818] 124,MIP6-Feature-Vector,string,[RFC5447] 125,MIP6-Home-Link-Prefix,ipv6prefix,[RFC5447] 126,Operator-Name,text,[RFC5580] 127,Location-Information,string,[RFC5580] 128,Location-Data,string,[RFC5580] 129,Basic-Location-Policy-Rules,string,[RFC5580] 130,Extended-Location-Policy-Rules,string,[RFC5580] 131,Location-Capable,enum,[RFC5580] 132,Requested-Location-Info,enum,[RFC5580] 133,Framed-Management-Protocol,enum,[RFC5607] 134,Management-Transport-Protection,enum,[RFC5607] 135,Management-Policy-Id,text,[RFC5607] 136,Management-Privilege-Level,integer,[RFC5607] 137,PKM-SS-Cert,concat,[RFC5904] 138,PKM-CA-Cert,concat,[RFC5904] 139,PKM-Config-Settings,string,[RFC5904] 140,PKM-Cryptosuite-List,string,[RFC5904] 141,PKM-SAID,text,[RFC5904] 142,PKM-SA-Descriptor,string,[RFC5904] 143,PKM-Auth-Key,string,[RFC5904] 144,DS-Lite-Tunnel-Name,text,[RFC6519] 145,Mobile-Node-Identifier,string,[RFC6572] 146,Service-Selection,text,[RFC6572] DeKok, Alan Standards Track [Page 33] INTERNET-DRAFT Data Types in RADIUS 24 August 2016 147,PMIP6-Home-LMA-IPv6-Address,ipv6addr,[RFC6572] 148,PMIP6-Visited-LMA-IPv6-Address,ipv6addr,[RFC6572] 149,PMIP6-Home-LMA-IPv4-Address,ipv4addr,[RFC6572] 150,PMIP6-Visited-LMA-IPv4-Address,ipv4addr,[RFC6572] 151,PMIP6-Home-HN-Prefix,ipv6prefix,[RFC6572] 152,PMIP6-Visited-HN-Prefix,ipv6prefix,[RFC6572] 153,PMIP6-Home-Interface-ID,ifid,[RFC6572] 154,PMIP6-Visited-Interface-ID,ifid,[RFC6572] 155,PMIP6-Home-IPv4-HoA,ipv4prefix,[RFC6572] 156,PMIP6-Visited-IPv4-HoA,ipv4prefix,[RFC6572] 157,PMIP6-Home-DHCP4-Server-Address,ipv4addr,[RFC6572] 158,PMIP6-Visited-DHCP4-Server-Address,ipv4addr,[RFC6572] 159,PMIP6-Home-DHCP6-Server-Address,ipv6addr,[RFC6572] 160,PMIP6-Visited-DHCP6-Server-Address,ipv6addr,[RFC6572] 161,PMIP6-Home-IPv4-Gateway,ipv4addr,[RFC6572] 162,PMIP6-Visited-IPv4-Gateway,ipv4addr,[RFC6572] 163,EAP-Lower-Layer,enum,[RFC6677] 164,GSS-Acceptor-Service-Name,text,[RFC7055] 165,GSS-Acceptor-Host-Name,text,[RFC7055] 166,GSS-Acceptor-Service-Specifics,text,[RFC7055] 167,GSS-Acceptor-Realm-Name,text,[RFC7055] 168,Framed-IPv6-Address,ipv6addr,[RFC6911] 169,DNS-Server-IPv6-Address,ipv6addr,[RFC6911] 170,Route-IPv6-Information,ipv6prefix,[RFC6911] 171,Delegated-IPv6-Prefix-Pool,text,[RFC6911] 172,Stateful-IPv6-Address-Pool,text,[RFC6911] 173,IPv6-6rd-Configuration,tlv,[RFC6930] 174,Allowed-Called-Station-Id,text,[RFC7268] 175,EAP-Peer-Id,string,[RFC7268] 176,EAP-Server-Id,string,[RFC7268] 177,Mobility-Domain-Id,integer,[RFC7268] 178,Preauth-Timeout,integer,[RFC7268] 179,Network-Id-Name,string,[RFC7268] 180,EAPoL-Announcement,concat,[RFC7268] 181,WLAN-HESSID,text,[RFC7268] 182,WLAN-Venue-Info,integer,[RFC7268] 183,WLAN-Venue-Language,string,[RFC7268] 184,WLAN-Venue-Name,text,[RFC7268] 185,WLAN-Reason-Code,integer,[RFC7268] 186,WLAN-Pairwise-Cipher,integer,[RFC7268] 187,WLAN-Group-Cipher,integer,[RFC7268] 188,WLAN-AKM-Suite,integer,[RFC7268] 189,WLAN-Group-Mgmt-Cipher,integer,[RFC7268] 190,WLAN-RF-Band,integer,[RFC7268] 191,Unassigned,, 192-223,Experimental Use,,[RFC3575] 224-240,Implementation Specific,,[RFC3575] 241,Extended-Attribute-1,extended,[RFC6929] DeKok, Alan Standards Track [Page 34] INTERNET-DRAFT Data Types in RADIUS 24 August 2016 241.1,Frag-Status,integer,[RFC7499] 241.2,Proxy-State-Length,integer,[RFC7499] 241.{3-25},Unassigned,, 241.26,Extended-Vendor-Specific-1,evs,[RFC6929] 241.{27-240},Unassigned,, 241.{241-255},Reserved,,[RFC6929] 242,Extended-Attribute-2,extended,[RFC6929] 242.{1-25},Unassigned,, 242.26,Extended-Vendor-Specific-2,evs,[RFC6929] 242.{27-240},Unassigned,, 242.{241-255},Reserved,,[RFC6929] 243,Extended-Attribute-3,extended,[RFC6929] 243.{1-25},Unassigned,, 243.26,Extended-Vendor-Specific-3,evs,[RFC6929] 243.{27-240},Unassigned,, 243.{241-255},Reserved,,[RFC6929] 244,Extended-Attribute-4,extended,[RFC6929] 244.{1-25},Unassigned,, 244.26,Extended-Vendor-Specific-4,evs,[RFC6929] 244.{27-240},Unassigned,, 244.{241-255},Reserved,,[RFC6929] 245,Extended-Attribute-5,long-extended,[RFC6929] 245.{1-25},Unassigned,, 245.26,Extended-Vendor-Specific-5,evs,[RFC6929] 245.{27-240},Unassigned,, 245.{241-255},Reserved,,[RFC6929] 246,Extended-Attribute-6,long-extended,[RFC6929] 246.{1-25},Unassigned,, 246.26,Extended-Vendor-Specific-6,evs,[RFC6929] 246.{27-240},Unassigned,, 246.{241-255},Reserved,,[RFC6929] 247-255,Reserved,,[RFC3575] 5. Security Considerations This specification is concerned solely with updates to IANA registries. As such, there are no security considerations with the document itself. However, the use of inconsistent names and poorly-defined entities in a protocol is problematic. Inconsistencies in specifications can lead to security and interoperability problems in implementations. Further, having one canonical source for the definition of data types means an implementor has fewer specifications to read. The implementation work is therefore simpler, and is more likely to be correct. DeKok, Alan Standards Track [Page 35] INTERNET-DRAFT Data Types in RADIUS 24 August 2016 The goal of this specification is to reduce ambiguities in the RADIUS protocol, which we believe will lead to more robust and more secure implementations. 6. IANA Considerations IANA is instructed to create one new registry as described above in Section 4.1. The "TBD" text in that section should be replaced with the RFC number of this document when it is published. IANA is instructed to update the RADIUS Attribute Type registry, as described above in Section 4.2. IANA is instructed to require that all allocation requests in the RADIUS Attribute Type registry contain a "Data Type" field. That field is required to contain one of the "Data Type" names contained in the RADIUS Data Type registry. IANA is instructed to require that updates to the RADIUS Data Type registry contain the following fields, with the associated instructions: * Value. IANA is instructed to assign the next unused integer in sequence to new data type definitions. * Name. IANA is instructed to require that this name be unique in the registry. * Reference. IANA is instructed to update this field with a reference to the document which defines the data type. 7. References 7.1. Normative References [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", RFC 2119, March, 1997. [RFC2865] Rigney, C., Willens, S., Rubens, A. and W. Simpson, "Remote Authentication Dial In User Service (RADIUS)", RFC 2865, June 2000. [RFC3162] Aboba, B., Zorn, G., and D. Mitton, "RADIUS and IPv6", RFC 3162, August 2001. DeKok, Alan Standards Track [Page 36] INTERNET-DRAFT Data Types in RADIUS 24 August 2016 [RFC3629] Yergeau, F., "UTF-8, a transformation format of ISO 10646", RFC 3629, November 2003. [RFC4072] Eronen, P., et al, "Diameter Extensible Authentication Protocol (EAP) Application", RFC 4072, February 2013. [RFC6158] DeKok, A., and Weber, G., "RADIUS Design Guidelines", RFC 6158, March 2011. [RFC6572] Xia, F., et al, "RADIUS Support for Proxy Mobile IPv6", RFC 6572, June 2012. 7.2. Informative References [RFC2868] Zorn, G., Leifer, D., Rubens, A., Shriver, J., Holdrege, M., and I. Goyret, "RADIUS Attributes for Tunnel Protocol Support", RFC 2868, June 2000. [RFC2869] Rigney, C., et al, "RADIUS Extensions", RFC 2869, June 2000. [RFC5234] Crocker, D. and P. Overell, "Augmented BNF for Syntax Specifications: ABNF", RFC 5234, January 2008. [RFC6929] DeKok, A., and Lior, A., "Remote Authentication Dial In User Service (RADIUS) Protocol Extensions", RFC 6929, April 2013. [RFC7268] Aboba, B, et al, "RADIUS Attributes for IEEE 802 Networks", RFC 7268, July 2015. [RFC7499] Perez-Mendez A., et al, "Support of Fragmentation of RADIUS Packets", RFC 7499, April 2015. [PEN] http://www.iana.org/assignments/enterprise-numbers Acknowledgments Thanks to the RADEXT WG for patience and reviews of this document. DeKok, Alan Standards Track [Page 37] INTERNET-DRAFT Data Types in RADIUS 24 August 2016 Authors' Addresses Alan DeKok The FreeRADIUS Server Project Email: aland@freeradius.org DeKok, Alan Standards Track [Page 38]