OAuth Working Group M.B. Jones Internet-Draft Self-Issued Consulting Obsoletes: 7523 (if approved) B. Campbell Updates: 7521, 7522, 9126 (if approved) Ping Identity Intended status: Standards Track C. Mortimore Expires: 17 May 2025 Disney 13 November 2024 JSON Web Token (JWT) Profile for OAuth 2.0 Client Authentication and Authorization Grants draft-jones-oauth-rfc7523bis-latest Abstract This specification defines the use of a JSON Web Token (JWT) Bearer Token as a means for requesting an OAuth 2.0 access token as well as for client authentication. 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 17 May 2025. Copyright Notice Copyright (c) 2024 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 carefully, as they describe your rights and restrictions with respect to this document. Code Components extracted from this document must include Revised BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Revised BSD License. Table of Contents 1. Introduction 1.1. Notational Conventions 1.2. Terminology 2. HTTP Parameter Bindings for Transporting Assertions 2.1. Using JWTs as Authorization Grants 2.2. Using JWTs for Client Authentication 3. JWT Format and Processing Requirements 3.1. Authorization Grant Processing 3.2. Client Authentication Processing 4. Authorization Grant Example 5. Interoperability Considerations 6. Security Considerations 7. Privacy Considerations 8. IANA Considerations 8.1. Media Type Registration 8.1.1. Registry Contents 9. Updates to RFC 7521 10. Updates to RFC 7522 11. Updates to RFC 9126 12. References 12.1. Normative References 12.2. Informative References Appendix A. Document History Acknowledgements Authors' Addresses 1. Introduction JSON Web Token (JWT) [JWT] is a JSON-based [RFC7159] security token encoding that enables identity and security information to be shared across security domains. A security token is generally issued by an Identity Provider and consumed by a Relying Party that relies on its content to identify the token's subject for security-related purposes. The OAuth 2.0 Authorization Framework [RFC6749] provides a method for making authenticated HTTP requests to a resource using an access token. Access tokens are issued to third-party clients by an authorization server (AS) with the (sometimes implicit) approval of the resource owner. In OAuth, an authorization grant is an abstract term used to describe intermediate credentials that represent the resource owner authorization. An authorization grant is used by the client to obtain an access token. Several authorization grant types are defined to support a wide range of client types and user experiences. OAuth also allows for the definition of new extension grant types to support additional clients or to provide a bridge between OAuth and other trust frameworks. Finally, OAuth allows the definition of additional authentication mechanisms to be used by clients when interacting with the authorization server. "Assertion Framework for OAuth 2.0 Client Authentication and Authorization Grants" [RFC7521] is an abstract extension to OAuth 2.0 that provides a general framework for the use of assertions (a.k.a. security tokens) as client credentials and/or authorization grants with OAuth 2.0. This specification profiles the OAuth Assertion Framework [RFC7521] to define an extension grant type that uses a JWT Bearer Token to request an OAuth 2.0 access token as well as for use as client credentials. The format and processing rules for the JWT defined in this specification are intentionally similar, though not identical, to those in the closely related specification "Security Assertion Markup Language (SAML) 2.0 Profile for OAuth 2.0 Client Authentication and Authorization Grants" [RFC7522]. The differences arise where the structure and semantics of JWTs differ from SAML Assertions. JWTs, for example, have no direct equivalent to the or elements of SAML Assertions. This document defines how a JWT Bearer Token can be used to request an access token when a client wishes to utilize an existing trust relationship, expressed through the semantics of the JWT, without a direct user-approval step at the authorization server. It also defines how a JWT can be used as a client authentication mechanism. The use of a security token for client authentication is orthogonal to and separable from using a security token as an authorization grant. They can be used either in combination or separately. Client authentication using a JWT is nothing more than an alternative way for a client to authenticate to the token endpoint or other endpoints such as the pushed authorization endpoint [RFC9126] and must be used in conjunction with some grant type to form a complete and meaningful protocol request. JWT authorization grants may be used with or without client authentication or identification. Whether or not client authentication is needed in conjunction with a JWT authorization grant, as well as the supported types of client authentication, are policy decisions at the discretion of the authorization server. The process by which the client obtains the JWT, prior to exchanging it with the authorization server or using it for client authentication, is out of scope. 1.1. Notational Conventions The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in BCP 14 [RFC2119] [RFC8174] when, and only when, they appear in all capitals, as shown here. Unless otherwise noted, all the protocol parameter names and values are case sensitive. 1.2. Terminology All terms are as defined in the following specifications: "The OAuth 2.0 Authorization Framework" [RFC6749], the OAuth Assertion Framework [RFC7521], and "JSON Web Token (JWT)" [JWT]. 2. HTTP Parameter Bindings for Transporting Assertions The OAuth Assertion Framework [RFC7521] defines generic HTTP parameters for transporting assertions (a.k.a. security tokens) during interactions with a token endpoint. This section defines specific parameters and treatments of those parameters for use with JWT Bearer Tokens. 2.1. Using JWTs as Authorization Grants To use a Bearer JWT as an authorization grant, the client uses an access token request as defined in Section 4 of the OAuth Assertion Framework [RFC7521] with the following specific parameter values and encodings. The value of the grant_type is urn:ietf:params:oauth:grant-type:jwt- bearer. The value of the assertion parameter MUST contain a single JWT. The scope parameter may be used, as defined in the OAuth Assertion Framework [RFC7521], to indicate the requested scope. Authentication of the client is optional, as described in Section 3.2.1 of OAuth 2.0 [RFC6749] and consequently, the client_id is only needed when a form of client authentication that relies on the parameter is used. The following example demonstrates an access token request with a JWT as an authorization grant (with extra line breaks for display purposes only): POST /token.oauth2 HTTP/1.1 Host: as.example.com Content-Type: application/x-www-form-urlencoded grant_type=urn%3Aietf%3Aparams%3Aoauth%3Agrant-type%3Ajwt-bearer &assertion=eyJ0eXAiOiJhdXRob3JpemF0aW9uLWdyYW50K2p3dCIsImFsZyI6Ik VTMjU2Iiwia2lkIjoiMTYifQ. eyJhdWQiOiJodHRwczovLw[...omitted for brevity...]. J9l-ZhwP[...omitted for brevity...] 2.2. Using JWTs for Client Authentication To use a JWT Bearer Token for client authentication, the client uses the following parameter values and encodings. The value of the client_assertion_type is urn:ietf:params:oauth:client-assertion-type:jwt-bearer. The value of the client_assertion parameter contains a single JWT. It MUST NOT contain more than one JWT. The following example demonstrates client authentication using a JWT during the presentation of an authorization code grant in an access token request (with extra line breaks for display purposes only): POST /token.oauth2 HTTP/1.1 Host: as.example.com Content-Type: application/x-www-form-urlencoded grant_type=authorization_code& code=n0esc3NRze7LTCu7iYzS6a5acc3f0ogp4& client_assertion_type=urn%3Aietf%3Aparams%3Aoauth%3A client-assertion-type%3Ajwt-bearer& client_assertion=eyJ0eXAiOiJjbGllbnQtYXV0aGVudGljYXRpb24rand0Iiwi YWxnIjoiUlMyNTYiLCJraWQiOiIyMiJ9. eyJhdWQiOiJodHRwczovLw[...omitted for brevity...]. cC4hiUPo[...omitted for brevity...] 3. JWT Format and Processing Requirements In order to issue an access token response as described in OAuth 2.0 [RFC6749] or to rely on a JWT for client authentication, the authorization server MUST validate the JWT according to the criteria below. Application of additional restrictions and policy are at the discretion of the authorization server. 1. The JWT MUST be explicitly typed, as defined in Section 3.11 of [RFC8725]. The typ header parameter values that MUST be used are defined in Section 3.1 and Section 3.2. The authorization server MUST reject JWTs that do not use the specified explicit type value. 2. The JWT MUST contain an iss (issuer) claim that contains a unique identifier for the entity that issued the JWT. In the absence of an application profile specifying otherwise, compliant applications MUST compare issuer values using the Simple String Comparison method defined in Section 6.2.1 of RFC 3986 [RFC3986]. 3. The JWT MUST contain a sub (subject) claim identifying the principal that is the subject of the JWT. Two cases need to be differentiated: a. For the authorization grant, the subject typically identifies an authorized accessor for which the access token is being requested (i.e., the resource owner or an authorized delegate), but in some cases, may be a pseudonymous identifier or other value denoting an anonymous user. b. For client authentication, the subject MUST be the client_id of the OAuth client. 4. The JWT MUST contain an aud (audience) claim containing the issuer identifier [RFC8414] of the authorization server as its sole value. The authorization server MUST have an issuer identifier to be used with this specification. Unlike the aud value specified in [RFC7523], there MUST be no value other than the issuer identifier of the intended authorization server used as the audience of the JWT; this includes that the token endpoint URL of the authorization server MUST NOT be used as an audience value. To simplify implementations, the aud claim value MUST be a JSON string, and not a single-valued JSON array. The authorization server MUST reject any JWT that does not contain its issuer identifier as its sole audience value. In the absence of an application profile specifying otherwise, compliant applications MUST compare the audience values using the Simple String Comparison method defined in Section 6.2.1 of RFC 3986 [RFC3986]. 5. The JWT MUST contain an exp (expiration time) claim that limits the time window during which the JWT can be used. The authorization server MUST reject any JWT with an expiration time that has passed, subject to allowable clock skew between systems. Note that the authorization server may reject JWTs with an exp claim value that is unreasonably far in the future. 6. The JWT MAY contain an nbf (not before) claim that identifies the time before which the token MUST NOT be accepted for processing. 7. The JWT MAY contain an iat (issued at) claim that identifies the time at which the JWT was issued. Note that the authorization server may reject JWTs with an iat claim value that is unreasonably far in the past. 8. The JWT MAY contain a jti (JWT ID) claim that provides a unique identifier for the token. The authorization server MAY ensure that JWTs are not replayed by maintaining the set of used jti values for the length of time for which the JWT would be considered valid based on the applicable exp instant. 9. The JWT MAY contain other claims. 10. The JWT MUST be digitally signed or have a Message Authentication Code (MAC) applied by the issuer. The authorization server MUST reject JWTs with an invalid signature or MAC. 11. The authorization server MUST reject a JWT that is not valid in all other respects per "JSON Web Token (JWT)" [JWT]. 3.1. Authorization Grant Processing Authorization grant JWTs MUST be explicitly typed by using the typ header parameter value authorization-grant+jwt. Authorization grant JWTs not using this explicit type value MUST be rejected by the authorization server. JWT authorization grants may be used with or without client authentication or identification. Whether or not client authentication is needed in conjunction with a JWT authorization grant, as well as the supported types of client authentication, are policy decisions at the discretion of the authorization server. However, if client credentials are present in the request, the authorization server MUST validate them. If the JWT is not valid, or the current time is not within the token's valid time window for use, the authorization server constructs an error response as defined in OAuth 2.0 [RFC6749]. The value of the error parameter MUST be the invalid_grant error code. The authorization server MAY include additional information regarding the reasons the JWT was considered invalid using the error_description or error_uri parameters. For example: HTTP/1.1 400 Bad Request Content-Type: application/json Cache-Control: no-store { "error":"invalid_grant", "error_description":"Audience validation failed" } 3.2. Client Authentication Processing Client authentication JWTs MUST be explicitly typed by using the typ header parameter value client-authentication+jwt. Client authentication JWTs not using this explicit type value MUST be rejected by the authorization server. If the client JWT is not valid, the authorization server constructs an error response as defined in OAuth 2.0 [RFC6749]. The value of the error parameter MUST be the invalid_client error code. The authorization server MAY include additional information regarding the reasons the JWT was considered invalid using the error_description or error_uri parameters. 4. Authorization Grant Example The following examples illustrate what a conforming JWT and an access token request would look like. The example shows a JWT issued and signed by the system entity identified as https://jwt-idp.example.com. The subject of the JWT is identified by email address as mike@example.com. The intended audience of the JWT is https://authz.example.net, which is the authorization server's issuer identifier. The JWT is sent as part of an access token request to the authorization server's token endpoint at https://authz.example.net/token.oauth2. Below is an example JSON object that could be encoded to produce the JWT Claims Set for a JWT: {"aud":"https://authz.example.net", "iss":"https://jwt-idp.example.com", "sub":"mailto:mike@example.com", "iat":1731721541, "exp":1731725141, "http://claims.example.com/member":true } The following example JSON object, used as the header parameters of a JWT, declares that the JWT is an authorization grant JWT, is signed with the Elliptic Curve Digital Signature Algorithm (ECDSA) P-256 with SHA-256, and was signed with a key identified by the kid value 16. {"typ":"authorization-grant+jwt","alg":"ES256","kid":"16"} To present the JWT with the claims and header shown in the previous example as part of an access token request, for example, the client might make the following HTTPS request (with extra line breaks for display purposes only): POST /token.oauth2 HTTP/1.1 Host: authz.example.net Content-Type: application/x-www-form-urlencoded grant_type=urn%3Aietf%3Aparams%3Aoauth%3Agrant-type%3Ajwt-bearer &assertion=eyJ0eXAiOiJhdXRob3JpemF0aW9uLWdyYW50K2p3dCIsImFsZyI6Ik VTMjU2Iiwia2lkIjoiMTYifQ. eyJhdWQiOiJodHRwczovLw[...omitted for brevity...]. J9l-ZhwP[...omitted for brevity...] 5. Interoperability Considerations Agreement between system entities regarding identifiers, keys, and endpoints is required in order to achieve interoperable deployments of this profile. Specific items that require agreement include values for the issuer identifiers, the locations of endpoints, the key used to apply and verify the digital signature or MAC over the JWT, one-time use restrictions on the JWT, maximum JWT lifetime allowed, and the specific subject and claim requirements of the JWT. The exchange of such information is explicitly out of scope for this specification. In some cases, additional profiles may be created that constrain or prescribe these values or specify how they are to be exchanged. Examples of such profiles include the OAuth 2.0 Dynamic Client Registration Protocol [RFC7591], OAuth 2.0 Authorization Server Metadata [RFC8414], OpenID Connect Dynamic Client Registration 1.0 [OpenID.Registration], OpenID Connect Discovery 1.0 [OpenID.Discovery], and OpenID Federation 1.0 [OpenID.Federation]. The RS256 algorithm, from [JWA], is a mandatory-to-implement JSON Web Signature algorithm for this profile. 6. Security Considerations The security considerations described within the following specifications are all applicable to this document: "Assertion Framework for OAuth 2.0 Client Authentication and Authorization Grants" [RFC7521], "The OAuth 2.0 Authorization Framework" [RFC6749], and "JSON Web Token (JWT)" [JWT]. The specification does not mandate replay protection for the JWT usage for either the authorization grant or for client authentication. It is an optional feature, which implementations may employ at their own discretion. This specification tightens the JWT audience requirements to prevent attacks that could result from exploiting audience ambiguities allowed by [RFC7523]. 7. Privacy Considerations A JWT may contain privacy-sensitive information and, to prevent disclosure of such information to unintended parties, should only be transmitted over encrypted channels, such as Transport Layer Security (TLS). In cases where it is desirable to prevent disclosure of certain information to the client, the JWT should be encrypted to the authorization server. Deployments should determine the minimum amount of information necessary to complete the exchange and include only such claims in the JWT. In some cases, the sub (subject) claim can be a value representing an anonymous or pseudonymous user, as described in Section 6.3.1 of the OAuth Assertion Framework [RFC7521]. 8. IANA Considerations The IANA actions of registering the URNs urn:ietf:params:oauth:grant- type:jwt-bearer and urn:ietf:params:oauth:client-assertion-type:jwt- bearer in the IANA "OAuth URI" registry [IANA.OAuth.Parameters] established by "An IETF URN Sub-Namespace for OAuth" [RFC6755] were performed by [RFC7523]. 8.1. Media Type Registration This section registers the following media types [RFC2046] in the "Media Types" registry [IANA.MediaTypes] in the manner described in [RFC6838]. 8.1.1. Registry Contents * Type name: application * Subtype name: authorization-grant+jwt * Required parameters: n/a * Optional parameters: n/a * Encoding considerations: binary; An authorization grant JWT is a JWT; JWT values are encoded as a series of base64url-encoded values (some of which may be the empty string) separated by period ('.') characters. * Security considerations: See Section 6 of this specification * Interoperability considerations: n/a * Published specification: Section 3.1 of this specification * Applications that use this media type: Applications that use this specification * Fragment identifier considerations: n/a * Additional information: Magic number(s): n/a File extension(s): n/a Macintosh file type code(s): n/a * Person & email address to contact for further information: Michael B. Jones, michael_b_jones@hotmail.com * Intended usage: COMMON * Restrictions on usage: none * Author: Michael B. Jones, michael_b_jones@hotmail.com * Change controller: OpenID Foundation Artifact Binding Working Group - openid-specs-ab@lists.openid.net * Provisional registration? No * Type name: application * Subtype name: client-authentication+jwt * Required parameters: n/a * Optional parameters: n/a * Encoding considerations: binary; A client authentication JWT is a JWT; JWT values are encoded as a series of base64url-encoded values (some of which may be the empty string) separated by period ('.') characters. * Security considerations: See Section 6 of this specification * Interoperability considerations: n/a * Published specification: Section 3.2 of this specification * Applications that use this media type: Applications that use this specification * Fragment identifier considerations: n/a * Additional information: Magic number(s): n/a File extension(s): n/a Macintosh file type code(s): n/a * Person & email address to contact for further information: Michael B. Jones, michael_b_jones@hotmail.com * Intended usage: COMMON * Restrictions on usage: none * Author: Michael B. Jones, michael_b_jones@hotmail.com * Change controller: OpenID Foundation Artifact Binding Working Group - openid-specs-ab@lists.openid.net * Provisional registration? No 9. Updates to RFC 7521 This section updates "Assertion Framework for OAuth 2.0 Client Authentication and Authorization Grants" [RFC7521] to tighten its audience requirements. The description of the Audience parameter in Section 5.1 of [RFC7521] (Assertion Metamodel) is replaced by: Audience A value that identifies the party intended to process the assertion. The audience MUST contain the issuer identifier [RFC8414] of the authorization server as its sole value. Unlike the audience value specified in [RFC7521], there MUST be no value other than the issuer identifier of the intended authorization server used as the audience of the assertion; this includes that the token endpoint URL of the authorization server MUST NOT be used as an audience value. The description of the Audience parameter in Section 5.2 of [RFC7521] (General Assertion Format and Processing Rules) is replaced by: * The assertion MUST contain an audience that identifies the authorization server as the intended audience, with the issuer identifier [RFC8414] of the authorization server as its sole value. The authorization server MUST reject any assertion that does not contain its own issuer identifier as the sole audience value. In the list of agreements required by participants in Section 7 of [RFC7521] (Interoperability Considerations), "Audience identifiers" is removed from the list. 10. Updates to RFC 7522 This section updates "Security Assertion Markup Language (SAML) 2.0 Profile for OAuth 2.0 Client Authentication and Authorization Grants" [RFC7522] to tighten its audience requirements. The description of the Audience element in Item 2 of Section 3 of [RFC7522] (Assertion Format and Processing Requirements) is replaced by: The Assertion MUST contain a element with an element with a single element that identifies the authorization server as the intended audience. The value of the element MUST be the issuer identifier [RFC8414] of the authorization server. Section 2.5.1.4 of "Assertions and Protocols for the OASIS Security Assertion Markup Language (SAML) V2.0" [OASIS.saml-core-2.0-os] defines the and elements. Unlike the audience value specified in [RFC7522], there MUST be no value other than the issuer identifier of the intended authorization server used as the audience of the assertion; this includes that the token endpoint URL of the authorization server MUST NOT be used as an audience value. The authorization server MUST reject any assertion that does not contain its own issuer identifier as the sole audience value. In Section 4 of [RFC7522] (Authorization Grant Example), the sentence: The intended audience of the Assertion is https://saml- sp.example.net, which is an identifier for a SAML Service Provider with which the authorization server identifies itself. is replaced by: The intended audience of the Assertion is https://authz.example.net, which is the authorization server's issuer identifier. In the same section, the SAML 2.0 Assertion example is replaced by: https://saml-idp.example.com [...omitted for brevity...] brian@example.com https://authz.example.net urn:oasis:names:tc:SAML:2.0:ac:classes:X509 Figure 1: Example SAML 2.0 Assertion In the list of agreements required by participants in Section 5 of [RFC7521] (Interoperability Considerations), "Audience identifiers" is removed from the list. 11. Updates to RFC 9126 This section updates "OAuth 2.0 Pushed Authorization Requests" [RFC9126] to tighten its audience requirements. The paragraph describing the audience value in Section 2 of [RFC9126] (Pushed Authorization Request Endpoint) is replaced by: This update resolves the potential ambiguity regarding the appropriate audience value to use when employing JWT client assertion-based authentication (as defined in Section 2.2 of [RFC7523] with the private_key_jwt or client_secret_jwt authentication method names per Section 9 of [OpenID.Core]) that was described in [RFC9126]. To address that ambiguity, the issuer identifier URL of the authorization server according to [RFC8414] MUST be used as the sole value of the audience. The authorization server MUST reject any such JWT that does not contain its own issuer identifier as the sole audience value. 12. References 12.1. Normative References [JWA] Jones, M., "JSON Web Algorithms (JWA)", RFC 7518, DOI 10.17487/RFC7518, May 2015, . [JWT] Jones, M., Bradley, J., and N. Sakimura, "JSON Web Token (JWT)", RFC 7519, DOI 10.17487/RFC7519, May 2015, . [OASIS.saml-core-2.0-os] Cantor, S., Kemp, J., Philpott, R., and E. Maler, "Assertions and Protocols for the OASIS Security Assertion Markup Language (SAML) V2.0", OASIS Standard saml-core- 2.0-os, March 2005, . [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, DOI 10.17487/RFC2119, March 1997, . [RFC3986] Berners-Lee, T., Fielding, R., and L. Masinter, "Uniform Resource Identifier (URI): Generic Syntax", STD 66, RFC 3986, DOI 10.17487/RFC3986, January 2005, . [RFC6749] Hardt, D., Ed., "The OAuth 2.0 Authorization Framework", RFC 6749, DOI 10.17487/RFC6749, October 2012, . [RFC7159] Bray, T., Ed., "The JavaScript Object Notation (JSON) Data Interchange Format", RFC 7159, DOI 10.17487/RFC7159, March 2014, . [RFC7521] Campbell, B., Mortimore, C., Jones, M., and Y. Goland, "Assertion Framework for OAuth 2.0 Client Authentication and Authorization Grants", RFC 7521, DOI 10.17487/RFC7521, May 2015, . [RFC7522] Campbell, B., Mortimore, C., and M. Jones, "Security Assertion Markup Language (SAML) 2.0 Profile for OAuth 2.0 Client Authentication and Authorization Grants", RFC 7522, DOI 10.17487/RFC7522, May 2015, . [RFC7523] Jones, M., Campbell, B., and C. Mortimore, "JSON Web Token (JWT) Profile for OAuth 2.0 Client Authentication and Authorization Grants", RFC 7523, DOI 10.17487/RFC7523, May 2015, . [RFC8174] Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC 2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174, May 2017, . [RFC8414] Jones, M., Sakimura, N., and J. Bradley, "OAuth 2.0 Authorization Server Metadata", RFC 8414, DOI 10.17487/RFC8414, June 2018, . [RFC8725] Sheffer, Y., Hardt, D., and M. Jones, "JSON Web Token Best Current Practices", BCP 225, RFC 8725, DOI 10.17487/RFC8725, February 2020, . [RFC9126] Lodderstedt, T., Campbell, B., Sakimura, N., Tonge, D., and F. Skokan, "OAuth 2.0 Pushed Authorization Requests", RFC 9126, DOI 10.17487/RFC9126, September 2021, . 12.2. Informative References [IANA.MediaTypes] IANA, "Media Types", . [IANA.OAuth.Parameters] IANA, "OAuth Parameters", . [OpenID.Core] Sakimura, N., Bradley, J., Jones, M.B., de Medeiros, B., and C. Mortimore, "OpenID Connect Core 1.0 incorporating errata set 2", 15 December 2023, . [OpenID.Discovery] Sakimura, N., Bradley, J., Jones, M.B., and E. Jay, "OpenID Connect Discovery 1.0 incorporating errata set 2", 15 December 2023, . [OpenID.Federation] Hedberg, R., Jones, M. B., Solberg, A., Bradley, J., Marco, G. D., and V. Dzhuvinov, "OpenID Federation 1.0", 24 October 2024, . [OpenID.Registration] Sakimura, N., Bradley, J., and M.B. Jones, "OpenID Connect Dynamic Client Registration 1.0 incorporating errata set 2", 15 December 2023, . [RFC2046] Freed, N. and N. Borenstein, "Multipurpose Internet Mail Extensions (MIME) Part Two: Media Types", RFC 2046, DOI 10.17487/RFC2046, November 1996, . [RFC6755] Campbell, B. and H. Tschofenig, "An IETF URN Sub-Namespace for OAuth", RFC 6755, DOI 10.17487/RFC6755, October 2012, . [RFC6838] Freed, N., Klensin, J., and T. Hansen, "Media Type Specifications and Registration Procedures", BCP 13, RFC 6838, DOI 10.17487/RFC6838, January 2013, . [RFC7591] Richer, J., Ed., Jones, M., Bradley, J., Machulak, M., and P. Hunt, "OAuth 2.0 Dynamic Client Registration Protocol", RFC 7591, DOI 10.17487/RFC7591, July 2015, . Appendix A. Document History [[ to be removed by the RFC Editor before publication as an RFC ]] -00 * Initial draft starting with rfc7523.xml, updated to use current references and affiliations and modern xml2rfc syntax, removing the IANA actions already performed, and adding the Document History section. * Use AS issuer identifier as the sole audience value. * Explicitly typed authorization grant JWTs and client authentication JWTs. * Update audience requirements in "Assertion Framework for OAuth 2.0 Client Authentication and Authorization Grants" [RFC7521]. * Update audience requirements in "Security Assertion Markup Language (SAML) 2.0 Profile for OAuth 2.0 Client Authentication and Authorization Grants" [RFC7522]. * Update audience requirements in "OAuth 2.0 Pushed Authorization Requests" [RFC9126]. Acknowledgements This profile was derived from "Security Assertion Markup Language (SAML) 2.0 Profile for OAuth 2.0 Client Authentication and Authorization Grants" [RFC7522], which has the same authors as this document. Authors' Addresses Michael B. Jones Self-Issued Consulting Email: michael_b_jones@hotmail.com URI: https://self-issued.info/ Brian Campbell Ping Identity Email: brian.d.campbell@gmail.com Chuck Mortimore Disney Email: charliemortimore@gmail.com