| Internet-Draft | Groupings for HTTP Clients and Servers | August 2024 |
| Watsen | Expires 16 February 2025 | [Page] |
This document presents two YANG modules: the first defines a minimal grouping for configuring an HTTP client, and the second defines a minimal grouping for configuring an HTTP server. It is intended that these groupings will be used to help define the configuration for simple HTTP-based protocols (not for complete web servers or browsers). Support is provided for HTTP/1.1, HTTP/2, and HTTP/3.¶
This draft contains placeholder values that need to be replaced with finalized values at the time of publication. This note summarizes all of the substitutions that are needed. No other RFC Editor instructions are specified elsewhere in this document.¶
Artwork in this document contains shorthand references to drafts in progress. Please apply the following replacements (note: not all may be present):¶
AAAA --> the assigned RFC value for draft-ietf-netconf-crypto-types¶
DDDD --> the assigned RFC value for draft-ietf-netconf-tcp-client-server¶
FFFF --> the assigned RFC value for draft-ietf-netconf-tls-client-server¶
GGGG --> the assigned RFC value for this draft¶
Artwork in this document contains placeholder values for the date of publication of this draft. Please apply the following replacement:¶
2024-08-15 --> the publication date of this draft¶
The "Relation to other RFCs" section Section 1.1 contains the text "one or more YANG modules" and, later, "modules". This text is sourced from a file in a context where it is unknown how many modules a draft defines. The text is not wrong as is, but it may be improved by stating more directly how many modules are defined.¶
The "Relation to other RFCs" section Section 1.1 contains a self-reference to this draft, along with a corresponding reference in the Appendix. Please replace the self-reference in this section with "This RFC" (or similar) and remove the self-reference in the "Normative/Informative References" section, whichever it is in.¶
Tree-diagrams in this draft may use the '\' line-folding mode defined in RFC 8792. However, nicer-to-the-eye is when the '\\' line-folding mode is used. The AD suggested suggested putting a request here for the RFC Editor to help convert "ugly" '\' folded examples to use the '\\' folding mode. "Help convert" may be interpreted as, identify what looks ugly and ask the authors to make the adjustment.¶
The following Appendix section is to be removed prior to publication:¶
Appendix A. Change Log¶
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 16 February 2025.¶
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.¶
This document presents two YANG 1.1 [RFC7950] modules: the first defines a minimal grouping for configuring an HTTP client, and the second defines a minimal grouping for configuring an HTTP server. It is intended that these groupings will be used to help define the configuration for simple HTTP-based protocols. Support is provided for HTTP/1.1, HTTP/2, and HTTP/3.¶
This document presents one or more YANG modules [RFC7950] that are part of a collection of RFCs that work together to, ultimately, support the configuration of both the clients and servers of both the NETCONF [RFC6241] and RESTCONF [RFC8040] protocols.¶
Primary dependency relationships between the YANG groupings defined in the various RFCs is presented in the below diagram. In some cases, a draft may define secondary groupings that introduce dependencies not illustrated in the diagram. The labels in the diagram are a shorthand name for the defining RFC. The citation reference for shorthand name is provided below the diagram.¶
Please note that the arrows in the diagram point from referencer to referenced. For example, the "crypto-types" RFC does not have any dependencies, whilst the "keystore" RFC depends on the "crypto-types" RFC.¶
crypto-types
^ ^
/ \
/ \
truststore keystore
^ ^ ^ ^
| +---------+ | |
| | | |
| +------------+ |
tcp-client-server | / | |
^ ^ ssh-client-server | |
| | ^ tls-client-server
| | | ^ ^ http-client-server
| | | | | ^
| | | +-----+ +---------+ |
| | | | | |
| +-----------|--------|--------------+ | |
| | | | | |
+-----------+ | | | | |
| | | | | |
| | | | | |
netconf-client-server restconf-client-server
¶
| Label in Diagram | Originating RFC |
|---|---|
| crypto-types | [I-D.ietf-netconf-crypto-types] |
| truststore | [I-D.ietf-netconf-trust-anchors] |
| keystore | [I-D.ietf-netconf-keystore] |
| tcp-client-server | [I-D.ietf-netconf-tcp-client-server] |
| ssh-client-server | [I-D.ietf-netconf-ssh-client-server] |
| tls-client-server | [I-D.ietf-netconf-tls-client-server] |
| http-client-server | [I-D.ietf-netconf-http-client-server] |
| netconf-client-server | [I-D.ietf-netconf-netconf-client-server] |
| restconf-client-server | [I-D.ietf-netconf-restconf-client-server] |
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.¶
This document is compliant with the Network Management Datastore Architecture (NMDA) [RFC8342]. For instance, as described in [I-D.ietf-netconf-trust-anchors] and [I-D.ietf-netconf-keystore], trust anchors and keys installed during manufacturing are expected to appear in <operational> (Section 5.3 of [RFC8342]), and <system> [I-D.ietf-netmod-system-config], if implemented.¶
This section defines a YANG 1.1 module called "ietf-http-client". A high-level overview of the module is provided in Section 2.1. Examples illustrating the module's use are provided in Section 2.2. The YANG module itself is defined in Section 2.3.¶
This section provides an overview of the "ietf-http-client" module in terms of its features and groupings.¶
The following diagram lists all the "feature" statements defined in the "ietf-http-client" module:¶
Features: +-- tls-supported +-- http-11-supported +-- http-2-supported +-- http-3-supported +-- proxy-connect¶
The diagram above uses syntax that is similar to but not defined in [RFC8340].¶
The "ietf-http-client" module defines the following "grouping" statements:¶
These groupings are presented in the following subsections.¶
The following tree diagram [RFC8340] illustrates the "http-client-common-grouping" grouping:¶
grouping http-client-common-grouping:
+-- uri inet:uri
+-- protocol-versions? union
+-- tls-client-parameters {tls-supported}?
+---u tlsc:tls-client-grouping
¶
Comments:¶
For the referenced grouping statement(s):¶
The following tree diagram [RFC8340] illustrates the "http-client-grouping" grouping:¶
grouping http-client-grouping:
+---u http-client-common-grouping
+-- proxy-connect! {proxy-connect}?
+---u http-client-common-grouping
¶
Comments:¶
For the referenced grouping statement(s):¶
The "ietf-http-client" module defines only "grouping" statements that are used by other modules to instantiate protocol-accessible nodes. Thus this module, when implemented, does not define any protocol-accessible nodes.¶
This section presents three examples showing the http-client-grouping populated with some data.¶
The first example illustrates the case where the HTTP client is configured to connect directly to an HTTP server without TLS.¶
<!-- The outermost element below doesn't exist in the data model. --> <!-- It simulates if the "grouping" were a "container" instead. --> <http-client xmlns="urn:ietf:params:xml:ns:yang:ietf-http-client"> <uri>https://user:pass@example.com/foo/bar?query#fragment</uri> </http-client>¶
The second example illustrates the case where the HTTP client is configured to connect directly to an HTTP server with TLS.¶
This example is consistent with examples presented in Section 2.2.1 of [I-D.ietf-netconf-trust-anchors] and Section 2.2.1 of [I-D.ietf-netconf-keystore].¶
=============== NOTE: '\' line wrapping per RFC 8792 ================
<!-- The outermost element below doesn't exist in the data model. -->
<!-- It simulates if the "grouping" were a "container" instead. -->
<http-client xmlns="urn:ietf:params:xml:ns:yang:ietf-http-client">
<uri>https://user:pass@example.com/foo/bar?query#fragment</uri>
<protocol-versions>http-11 http-2 http-3</protocol-versions>
<tls-client-parameters>
<client-identity>
<certificate>
<central-keystore-reference>
<asymmetric-key>rsa-asymmetric-key</asymmetric-key>
<certificate>ex-rsa-cert</certificate>
</central-keystore-reference>
</certificate>
</client-identity>
<server-authentication>
<ca-certs>
<central-truststore-reference>trusted-server-ca-certs</centr\
al-truststore-reference>
</ca-certs>
<ee-certs>
<central-truststore-reference>trusted-server-ee-certs</centr\
al-truststore-reference>
</ee-certs>
</server-authentication>
</tls-client-parameters>
</http-client>
¶
The following example illustrates the case where the HTTP client is configured to connect through an HTTP proxy.¶
This example also is consistent with examples presented in Section 2.2.1 of [I-D.ietf-netconf-trust-anchors] and Section 2.2.1 of [I-D.ietf-netconf-keystore].¶
=============== NOTE: '\' line wrapping per RFC 8792 ================
<!-- The outermost element below doesn't exist in the data model. -->
<!-- It simulates if the "grouping" were a "container" instead. -->
<http-client xmlns="urn:ietf:params:xml:ns:yang:ietf-http-client">
<uri>https://user:pass@remote-server-example.com/foo/bar?query#fra\
gment</uri>
<protocol-versions>http-11 http-2 http-3</protocol-versions>
<tls-client-parameters>
<client-identity>
<certificate>
<central-keystore-reference>
<asymmetric-key>rsa-asymmetric-key</asymmetric-key>
<certificate>ex-rsa-cert</certificate>
</central-keystore-reference>
</certificate>
</client-identity>
<server-authentication>
<ca-certs>
<central-truststore-reference>trusted-server-ca-certs</centr\
al-truststore-reference>
</ca-certs>
<ee-certs>
<central-truststore-reference>trusted-server-ee-certs</centr\
al-truststore-reference>
</ee-certs>
</server-authentication>
</tls-client-parameters>
<proxy-connect>
<uri>https://user:pass@proxy-example.com</uri>
<protocol-versions>http-2</protocol-versions>
</proxy-connect>
</http-client>
¶
This YANG module has references to [RFC3986], [RFC6991], [RFC8341], [RFC9110], and [I-D.ietf-netconf-tls-client-server].¶
<CODE BEGINS> file "ietf-http-client@2024-08-15.yang"¶
module ietf-http-client {
yang-version 1.1;
namespace "urn:ietf:params:xml:ns:yang:ietf-http-client";
prefix httpc;
import ietf-inet-types {
prefix inet;
reference
"RFC 6991: Common YANG Data Types";
}
import ietf-netconf-acm {
prefix nacm;
reference
"RFC 8341: Network Configuration Access Control Model";
}
import ietf-tls-client {
prefix tlsc;
reference
"RFC FFFF: YANG Groupings for TLS Clients and TLS Servers";
}
organization
"IETF NETCONF (Network Configuration) Working Group";
contact
"WG Web: https://datatracker.ietf.org/wg/netconf
WG List: NETCONF WG list <mailto:netconf@ietf.org>
Author: Kent Watsen <mailto:kent+ietf@watsen.net>";
description
"This module defines reusable groupings for HTTP clients that
can be used as a basis for specific HTTP client instances.
Copyright (c) 2024 IETF Trust and the persons identified
as authors of the code. All rights reserved.
Redistribution and use in source and binary forms, with
or without modification, is permitted pursuant to, and
subject to the license terms contained in, the Revised
BSD License set forth in Section 4.c of the IETF Trust's
Legal Provisions Relating to IETF Documents
(https://trustee.ietf.org/license-info).
This version of this YANG module is part of RFC GGGG
(https://www.rfc-editor.org/info/rfcGGGG); see the RFC
itself for full legal notices.
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 (RFC 2119)
(RFC 8174) when, and only when, they appear in all
capitals, as shown here.";
revision 2024-08-15 {
description
"Initial version";
reference
"RFC GGGG: YANG Groupings for HTTP Clients and HTTP Servers";
}
// Features
feature tls-supported {
description
"Indicates that the server supports configuring
HTTP client certificates.";
reference
"RFC 9110: HTTP Semantics";
}
feature "http-11-supported" {
description
"Indicates that the server supports configuring
clients to use the HTTP/1.1 protocol.";
reference
"RFC 9112: HTTP/1.1";
}
feature "http-2-supported" {
description
"Indicates that the server supports configuring
clients to use the HTTP/2 protocol.";
reference
"RFC 9113: HTTP/2";
}
feature "http-3-supported" {
if-feature "tls-supported";
description
"Indicates that the server supports configuring
clients to use the HTTP/3 protocol.";
reference
"RFC 9114 - HTTP/3";
}
feature proxy-connect {
description
"Indicates that the server supports configuring HTTP
clients to connect to a remote HTTP server via a
proxy, per Section 9.3.6 of RFC 9110.";
reference
"RFC 9110: HTTP Semantics";
}
// Groupings
grouping http-client-common-grouping {
description
"A grouping for the 'http-client-grouping' and
its descendant node 'proxy-connect' to use.";
leaf uri {
nacm:default-deny-all;
type inet:uri;
mandatory true;
description
"The URI the client uses.
As described by RFC 3986, URIs encode:
- scheme: e.g., https
- userinfo: e.g., user@pass
- host: e.g., example.com
- port: e.g., 443
- path: e.g., /foo/bar
- query: e.g., ?query
- fragment: e.g., #fragment
";
reference
"RFC 3986 URI Generic Syntax";
}
leaf protocol-versions {
type union {
type enumeration {
enum any {
description
"Indicates the client is willing to use any version";
}
}
type bits {
bit "http-11" {
if-feature "http-11-supported";
description
"Indicates the client is willing to use HTTP/1.1.";
}
bit "http-2" {
if-feature "http-2-supported";
description
"Indicates the client is willing to use HTTP/2.";
}
bit "http-3" {
if-feature "http-3-supported";
description
"Indicates the client is willing to use HTTP/3.";
}
}
}
default "any";
description
"HTTP protocol versions the client supports.";
}
container tls-client-parameters {
if-feature "tls-supported";
description
"TLS client parameters.";
uses tlsc:tls-client-grouping {
refine server-authentication {
presence
"Indicates that TLS-client parameters have been
configured. This statement is present so the
mandatory descendant nodes do not imply that
this node must be configured.";
}
}
}
}
grouping http-client-grouping {
description
"A reusable grouping for configuring an HTTP client.";
uses http-client-common-grouping;
container proxy-connect {
if-feature proxy-connect;
presence
"Indicates that the HTTP-client connects through a proxy.
This statement is present so the mandatory descendant
nodes do not imply that this node must be configured.";
uses http-client-common-grouping;
description
"Configures the proxy server the HTTP-client is to
connect through, per Section 9.3.6 of RFC 9110.";
reference
"RFC 9110: HTTP Semantics";
}
} // grouping http-client-grouping
}
¶
<CODE ENDS>¶
This section defines a YANG 1.1 module called "ietf-http-server". A high-level overview of the module is provided in Section 3.1. Examples illustrating the module's use are provided in Section 3.2. The YANG module itself is defined in Section 3.3.¶
This section provides an overview of the "ietf-http-server" module in terms of its features and groupings.¶
The following diagram lists all the "feature" statements defined in the "ietf-http-server" module:¶
Features: +-- client-auth-supported +-- local-users-supported +-- basic-auth +-- tcp-supported +-- tls-supported +-- quic-supported¶
The diagram above uses syntax that is similar to but not defined in [RFC8340].¶
The "ietf-http-server" module defines the following "grouping" statements:¶
Each of these groupings are presented in the following subsections.¶
The following tree diagram [RFC8340] illustrates the "http-server-grouping" grouping:¶
grouping http-server-grouping:
+-- server-name? string
+-- client-authentication! {client-auth-supported}?
+-- users {local-users-supported}?
+-- user* [user-id]
+-- user-id? string
+-- (auth-type)
+--:(basic)
+-- basic {basic-auth}?
+-- username? string
+-- password
+-- hashed-password? ianach:crypt-hash
+--ro last-modified? yang:date-and-time
¶
Comments:¶
The following tree diagram [RFC8340] illustrates the "http-server-stack-grouping" grouping:¶
grouping http-server-stack-grouping:
+-- (transport)
+--:(tcp) {tcp-supported}?
| +-- tcp
| +-- tcp-server-parameters
| | +---u tcps:tcp-server-grouping
| +-- http-server-parameters
| +---u http-server-grouping
+--:(tls) {tls-supported}?
| +-- tls
| +-- tcp-server-parameters
| | +---u tcps:tcp-server-grouping
| +-- tls-server-parameters
| | +---u tlss:tls-server-grouping
| +-- http-server-parameters
| +---u http-server-grouping
+--:(quic) {quic-supported}?
+-- quic
+-- udp-server-parameters
| +---u udps:udp-server-grouping
+-- tls-server-parameters
| +---u tlss:tls-server-grouping
+-- http-server-parameters
+---u http-server-grouping
¶
Comments:¶
For the referenced grouping statement(s):¶
The "ietf-http-server" module defines only "grouping" statements that are used by other modules to instantiate protocol-accessible nodes. Thus this module, when implemented, does not define any protocol-accessible nodes.¶
This section presents an example showing the http-server-grouping populated with some data.¶
<!-- The outermost element below doesn't exist in the data model. --> <!-- It simulates if the "grouping" were a "container" instead. --> <http-server xmlns="urn:ietf:params:xml:ns:yang:ietf-http-server"> <server-name>foo.example.com</server-name> </http-server>¶
This YANG module has references to [RFC6991], [RFC7317], [RFC7617], [RFC8341], [RFC9110], [I-D.ietf-netconf-tcp-client-server], [I-D.ietf-netconf-tls-client-server], and [I-D.ietf-netconf-udp-client-server].¶
<CODE BEGINS> file "ietf-http-server@2024-08-15.yang"¶
module ietf-http-server {
yang-version 1.1;
namespace "urn:ietf:params:xml:ns:yang:ietf-http-server";
prefix https;
import ietf-yang-types {
prefix yang;
reference
"RFC 6991: Common YANG Data Types";
}
import iana-crypt-hash {
prefix ianach;
reference
"RFC 7317: A YANG Data Model for System Management";
}
import ietf-netconf-acm {
prefix nacm;
reference
"RFC 8341: Network Configuration Access Control Model";
}
import ietf-tcp-server {
prefix tcps;
reference
"RFC DDDD: YANG Groupings for TCP Clients and TCP Servers";
}
import ietf-tls-server {
prefix tlss;
reference
"RFC FFFF: YANG Groupings for TLS Clients and TLS Servers";
}
import ietf-udp-server {
prefix udps;
reference
"RFC JJJJ: YANG Groupings for UDP Clients and UDP Servers";
}
organization
"IETF NETCONF (Network Configuration) Working Group";
contact
"WG Web: https://datatracker.ietf.org/wg/netconf
WG List: NETCONF WG list <mailto:netconf@ietf.org>
Author: Kent Watsen <mailto:kent+ietf@watsen.net>";
description
"This module defines reusable groupings for HTTP servers that
can be used as a basis for specific HTTP server instances.
Copyright (c) 2024 IETF Trust and the persons identified
as authors of the code. All rights reserved.
Redistribution and use in source and binary forms, with
or without modification, is permitted pursuant to, and
subject to the license terms contained in, the Revised
BSD License set forth in Section 4.c of the IETF Trust's
Legal Provisions Relating to IETF Documents
(https://trustee.ietf.org/license-info).
This version of this YANG module is part of RFC GGGG
(https://www.rfc-editor.org/info/rfcGGGG); see the RFC
itself for full legal notices.
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 (RFC 2119)
(RFC 8174) when, and only when, they appear in all
capitals, as shown here.";
revision 2024-08-15 {
description
"Initial version";
reference
"RFC GGGG: YANG Groupings for HTTP Clients and HTTP Servers";
}
// Features
feature client-auth-supported {
description
"Indicates that the server supports configuring HTTP
servers to authenticate HTTP clients. HTTP-level client
authentication may not be needed when client authentication
is expected to occur only at another protocol layer (e.g.,
TLS).";
}
feature local-users-supported {
if-feature "client-auth-supported";
description
"Indicates that the server supports configuring client
authentication with its own database of local users, as
opposed to in an application specific location.";
}
feature basic-auth {
if-feature "local-users-supported";
description
"Indicates that the server supports configuring 'basic'
authentication credentials in its local user database.";
reference
"RFC 7617: The 'Basic' HTTP Authentication Scheme";
}
feature tcp-supported {
description
"Indicates that the server supports configuring HTTP
servers to listen for HTTP 1.1/2.0 connections over TCP.";
reference
"RFC 9110: HTTP Semantics";
}
feature tls-supported {
description
"Indicates that the server supports configuring HTTP
servers to listen for HTTP 1.1/2.0 connections over TLS.";
reference
"RFC 9110: HTTP Semantics";
}
feature quic-supported {
description
"Indicates that the server supports configuring HTTP
servers to listen for HTTP/3 connections over QUIC.";
reference
"RFC 9114: HTTP/3";
}
// Groupings
grouping http-server-grouping {
description
"A reusable grouping for configuring an HTTP server.
Note that this grouping uses fairly typical descendant
node names such that a stack of 'uses' statements will
have name conflicts. It is intended that the consuming
data model will resolve the issue (e.g., by wrapping
the 'uses' statement in a container called
'http-server-parameters'). This model purposely does
not do this itself so as to provide maximum flexibility
to consuming models.";
leaf server-name {
nacm:default-deny-write;
type string;
description
"The value of the 'Server' header field. If not set, then
underlying software's default value is used. Set to the
empty string to disable.";
}
container client-authentication {
if-feature "client-auth-supported";
nacm:default-deny-write;
presence
"Indicates that HTTP based client authentication is
configured. This statement is present so the mandatory
descendant nodes do not imply that this node must be
configured.";
description
"Configures how the HTTP server can authenticate HTTP
clients. The HTTP server will request that the HTTP
client send authentication when needed.";
container users {
if-feature "local-users-supported";
description
"A list of locally configured users.";
list user {
key "user-id";
description
"The list of local users configured on this device.";
leaf user-id {
type string;
description
"The user-id for the authenticating client.";
}
choice auth-type {
mandatory true;
description
"The authentication type.";
case basic {
container basic {
if-feature "basic-auth";
leaf username {
type string;
description
"The username for the authenticating HTTP
client.";
}
container password {
description
"The hashed password the HTTP server uses to
authenticate this user. A user is authenticated
if the hash of the supplied password matches
this value.";
leaf hashed-password {
type ianach:crypt-hash;
description
"The password for the authenticating client.";
}
leaf last-modified {
type yang:date-and-time;
config false;
description
"Identifies when the password was last set.";
}
}
description
"The 'basic' HTTP scheme credentials.";
reference
"RFC 7617:
The 'Basic' HTTP Authentication Scheme";
}
}
}
}
}
} // container client-authentication
} // grouping http-server-grouping
grouping http-server-stack-grouping {
description
"A grouping that defines common HTTP-based protocol stacks.";
choice transport {
mandatory true;
description
"Choice amongst various transports type.";
case tcp {
if-feature "tcp-supported";
container tcp {
description
"Container for TCP-based HTTP protocols.";
container tcp-server-parameters {
description
"TCP-level server parameters to
listen for HTTP connections.";
uses tcps:tcp-server-grouping {
refine "local-bind/local-port" {
default "80";
description
"The HTTP server will attempt to connect
to the IANA-assigned well-known port for
'http' (80) if no value is specified.";
}
}
}
container http-server-parameters {
description
"HTTP-level server parameters to
listen for HTTP connections.";
uses http-server-grouping;
}
}
}
case tls {
if-feature "tls-supported";
container tls {
description
"Container for TLS-based HTTP protocols.";
container tcp-server-parameters {
description
"TCP-level server parameters to
listen for HTTPS connections.";
uses tcps:tcp-server-grouping {
refine "local-bind/local-port" {
default "443";
description
"The HTTP server will attempt to connect
to the IANA-assigned well-known port for
'https' (443) if no value is specified.";
}
}
}
container tls-server-parameters {
description
"TLS-level server parameters to
listen for HTTPS connections.";
uses tlss:tls-server-grouping;
}
container http-server-parameters {
description
"HTTP-level server parameters to
listen for HTTPS connections.";
uses http-server-grouping;
}
}
}
case quic {
if-feature "quic-supported";
container quic {
description
"Container for the QUIC-based HTTP/3 protocol.";
container udp-server-parameters {
description
"UDP-level server parameters.";
uses udps:udp-server-grouping;
}
container tls-server-parameters {
description
"TLS-level server parameters.";
uses tlss:tls-server-grouping;
}
container http-server-parameters {
description
"HTTP-level server parameters.";
uses http-server-grouping;
}
}
}
}
} // http-server-stack-grouping
}
¶
<CODE ENDS>¶
The two YANG modules in this document define groupings and will not be deployed as standalone modules. Their security implications may be context dependent based on their use in other modules. The designers of modules which import these grouping must conduct their own analysis of the security considerations.¶
This section follows the template defined in Section 3.7.1 of [RFC8407].¶
The "ietf-http-client" YANG module defines "grouping" statements that are designed to be accessed via YANG based management protocols, such as NETCONF [RFC6241] and RESTCONF [RFC8040]. Both of these protocols have mandatory-to-implement secure transport layers (e.g., SSH, TLS) with mutual authentication.¶
The Network Access Control Model (NACM) [RFC8341] provides the means to restrict access for particular users to a pre-configured subset of all available protocol operations and content.¶
Please be aware that this YANG module uses groupings from other YANG modules that define nodes that may be considered sensitive or vulnerable in network environments. Please review the Security Considerations for dependent YANG modules for information as to which nodes may be considered sensitive or vulnerable in network environments.¶
Some of the readable data nodes defined in this YANG module, i.e., excluding imported modules, may be considered sensitive or vulnerable in some network environments. It is thus important to control read access to these data nodes. The following data nodes have particular sensitivity/vulnerability:¶
The "uri" node:¶
The "proxy-connect/uri" node:¶
The follwing writable data nodes defined in this YANG module, i.e., excluding imported modules, are considered sensitive or vulnerable in network environments:¶
The "proxy-connect" node in the "http-client-grouping" grouping may be considered sensitive or vulnerable in some network environments. For this reason, the NACM extension "default-deny-all" has been applied to it. A misconfigured "proxy-connect" node may result in loss of connectivity or, perhaps, unexpectedly elevated authorization.¶
This module does not define any RPCs, actions, or notifications, and thus the security consideration for such is not provided here.¶
This section follows the template defined in Section 3.7.1 of [RFC8407].¶
The "ietf-http-server" YANG module defines "grouping" statements that are designed to be accessed via YANG based management protocols, such as NETCONF [RFC6241] and RESTCONF [RFC8040]. Both of these protocols have mandatory-to-implement secure transport layers (e.g., SSH, TLS) with mutual authentication.¶
The Network Access Control Model (NACM) [RFC8341] provides the means to restrict access for particular users to a pre-configured subset of all available protocol operations and content.¶
Please be aware that this YANG module uses groupings from other YANG modules that define nodes that may be considered sensitive or vulnerable in network environments. Please review the Security Considerations for dependent YANG modules for information as to which nodes may be considered sensitive or vulnerable in network environments.¶
None of the readable data nodes defined in this YANG module, i.e., excluding imported modules, are considered sensitive or vulnerable in network environments. The NACM "default-deny-all" extension has not been set for any data nodes defined in this module.¶
The follwing writable data nodes defined in this YANG module, i.e., excluding imported modules, are considered sensitive or vulnerable in network environments:¶
The "server-name" node in the "http-server-grouping" grouping may be considered sensitive or vulnerable in some network environments. For this reason, the NACM extension "default-deny-write" has been applied to it. A misconfigured "server-name" may mislead clients into not knowing how to interoperate with the server (e.g., "foo v1.0" vs "foo 2.0").¶
The "client-authentication" node in the "http-server-grouping" grouping may be considered sensitive or vulnerable in some network environments. For this reason, the NACM extension "default-deny-write" has been applied to it. The feature "tls-supported" is not required, in order to support cases where an external device is used to terminate TLS connections, but such arrangements leave the client- credentials to be unprotected by the transport. Misconfigured "client-authentication" may lead the server to authenticate invalid client credentials.¶
This module does not define any RPCs, actions, or notifications, and thus the security consideration for such is not provided here.¶
This document registers two URIs in the "ns" subregistry of the IETF XML Registry [RFC3688]. Following the format in [RFC3688], the following registrations are requested:¶
URI: urn:ietf:params:xml:ns:yang:ietf-http-client Registrant Contact: The IESG XML: N/A, the requested URI is an XML namespace. URI: urn:ietf:params:xml:ns:yang:ietf-http-server Registrant Contact: The IESG XML: N/A, the requested URI is an XML namespace.¶
This document registers two YANG modules in the YANG Module Names registry [RFC6020]. Following the format in [RFC6020], the following registrations are requested:¶
name: ietf-http-client namespace: urn:ietf:params:xml:ns:yang:ietf-http-client prefix: httpc reference: RFC GGGG name: ietf-http-server namespace: urn:ietf:params:xml:ns:yang:ietf-http-server prefix: https reference: RFC GGGG¶
Modified Abstract and Intro to be more accurate wrt intended applicability.¶
In ietf-http-client, removed "protocol-version" and all auth schemes except "basic".¶
In ietf-http-client, factored out "client-identity-grouping" for proxy connections.¶
In ietf-http-server, removed "choice required-or-optional" and "choice inline-or-external".¶
In ietf-http-server, moved the basic auth under a "choice auth-type" limited by new "feature basic-auth".¶
Removed the unused "external-client-auth-supported" feature from ietf-http-server.¶
Added a parent "container" to "client-identity-grouping" so that it could be better used by the proxy model.¶
Added a "choice" to the proxy model enabling selection of proxy types.¶
Added 'http-client-stack-grouping' and 'http-server-stack-grouping' convenience groupings.¶
Expanded "Data Model Overview section(s) [remove "wall" of tree diagrams].¶
Updated the Security Considerations section.¶
Added XML-comment above examples explaining the reason for the unusual top-most element's presence.¶
Renamed 'client-auth-config-supported' to 'client-auth-supported' consistent with other drafts.¶
Wrapped 'container basic' choice inside a 'case basic' per best practice.¶
Aligned modules with `pyang -f` formatting.¶
Fixed nits found by YANG Doctor reviews.¶
NO UPDATE.¶
Updated per Shepherd reviews impacting the suite of drafts.¶
Updated per Shepherd reviews impacting the suite of drafts.¶
Addresses AD review comments.¶
Added note to Editor to fix line foldings.¶
Removed "Conventions" section as there are no "BASE64VALUE=" values used in draft.¶
Clarified that the modules, when implemented, do not define any protocol-accessible nodes.¶
Added Security Considerations text to also look a SC-section from imported modules.¶
Removed "A wrapper around the foobar parameters to avoid name collisions" text.¶
Removed "public-key-format" and "public-key" nodes from examples.¶
Addresses AD review by Rob Wilton.¶
Addresses 1st-round of IESG reviews.¶
Addresses issues found in OpsDir review of the ssh-client-server draft.¶
s/defines/presents/ in a few places.¶
Add refs to where the 'operational' and 'system' datastores are defined.¶
Renamed Security Considerations section s/Template for/Considerations for/.¶
Updated "http-client-stack-grouping" and "http-server-stack-grouping" for HTTP/3.¶
Address IESG review comments.¶
Updated to reflect comments from Paul Wouters.¶
The authors would like to thank the following for lively discussions on list and in the halls (ordered by first name): Ben Schwartz, Éric Vyncke, Mark Nottingham, Mahesh Jethanandani, Murray Kucherawy, Orie Steele, Rob Wilton, Roman Danyliw, Shivan Sahib, and Willy Tarreau.¶