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20 changes: 20 additions & 0 deletions src/schemas/validation/README.md
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# OpenAPI Security Specification JSON Schema

This directory contains the YAML sources for generating the JSON Schemas for validating OpenAPI Security Specification (OSS) Standardized API Features (SAFs), which are published on [https://spec.openapis.org](https://spec.openapis.org).

***NOTE:*** The exact structure and versioning policy of SAF schemas is still being discussed. The current schemas are ported over from the OpenAPI Specification but the approach is subject to change.

Due to limitations of GitHub pages, the schemas on the spec site are served with `Content-Type: application/octet-stream`, but should be interpreted as `application/schema+json`.

The sources in this directory, which have `WORK-IN-PROGRESS` in their `$id`s, are _not intended for direct use_.

## Schema `$id` dates

The published schemas on the spec site have an _iteration date_ in their `id`s.
This allows the schemas for a release line to be updated independent of the spec patch release cycle.

The iteration version of the JSON Schema can be found in the `$id` field.
For example, the value of `$id: https://spec.openapis.org/oas/3.1/schema/2021-03-02` means this iteration was created on March 2nd, 2021.

We are [working on](https://github.com/OAI/OpenAPI-Specification/issues/4152) how to best provide programmatic access for determining the latest date for each schema.

230 changes: 230 additions & 0 deletions src/schemas/validation/schema.yaml
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$id: 'https://spec.openapis.org/security/legacy/3.3/schema/WORK-IN-PROGRESS'
$schema: 'https://json-schema.org/draft/2020-12/schema'

description: The description of OpenAPI legacy security Objects

$defs:
security-scheme:
$comment: https://spec.openapis.org/oas/v3.3#security-scheme-object
type: object
properties:
type:
enum:
- apiKey
- http
- mutualTLS
- oauth2
- openIdConnect
description:
type: string
deprecated:
default: false
type: boolean
required:
- type
allOf:
- $ref: '#/$defs/specification-extensions'
- $ref: '#/$defs/security-scheme/$defs/type-apikey'
- $ref: '#/$defs/security-scheme/$defs/type-http'
- $ref: '#/$defs/security-scheme/$defs/type-http-bearer'
- $ref: '#/$defs/security-scheme/$defs/type-oauth2'
- $ref: '#/$defs/security-scheme/$defs/type-oidc'
Comment on lines +27 to +31

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I think of the security scheme object as a "discriminated union", with the type field being the "discriminator". I think the natural way to think of discriminated unions is as a "oneOf". Is there some advantage or benefit to expressing it as an "allOf" here? Not that I think the current description is "wrong" -- it just doesn't match my intuition. And I think an "allOf" description might be less verbose -- avoiding the "if / then / else" construction in the subschemas.

unevaluatedProperties: false

$defs:
type-apikey:
if:
properties:
type:
const: apiKey
then:
properties:
name:
type: string
in:
enum:
- query
- header
- cookie
required:
- name
- in

type-http:
if:
properties:
type:
const: http
then:
properties:
scheme:
type: string
required:
- scheme

type-http-bearer:
if:
properties:
type:
const: http
scheme:
type: string
pattern: ^[Bb][Ee][Aa][Rr][Ee][Rr]$
required:
- type
- scheme
then:
properties:
bearerFormat:
type: string

type-oauth2:
if:
properties:
type:
const: oauth2
then:
properties:
flows:
$ref: '#/$defs/oauth-flows'
oauth2MetadataUrl:
type: string
format: uri-reference
required:
- flows

type-oidc:
if:
properties:
type:
const: openIdConnect
then:
properties:
openIdConnectUrl:
type: string
format: uri-reference
required:
- openIdConnectUrl

oauth-flows:
type: object
properties:
implicit:
$ref: '#/$defs/oauth-flows/$defs/implicit'
password:
$ref: '#/$defs/oauth-flows/$defs/password'
clientCredentials:
$ref: '#/$defs/oauth-flows/$defs/client-credentials'
authorizationCode:
$ref: '#/$defs/oauth-flows/$defs/authorization-code'
deviceAuthorization:
$ref: '#/$defs/oauth-flows/$defs/device-authorization'
$ref: '#/$defs/specification-extensions'
unevaluatedProperties: false

$defs:
implicit:
type: object
properties:
authorizationUrl:
type: string
format: uri-reference
refreshUrl:
type: string
format: uri-reference
scopes:
$ref: '#/$defs/map-of-strings'
required:
- authorizationUrl
- scopes
$ref: '#/$defs/specification-extensions'
unevaluatedProperties: false

password:
type: object
properties:
tokenUrl:
type: string
format: uri-reference
refreshUrl:
type: string
format: uri-reference
scopes:
$ref: '#/$defs/map-of-strings'
required:
- tokenUrl
- scopes
$ref: '#/$defs/specification-extensions'
unevaluatedProperties: false

client-credentials:
type: object
properties:
tokenUrl:
type: string
format: uri-reference
refreshUrl:
type: string
format: uri-reference
scopes:
$ref: '#/$defs/map-of-strings'
required:
- tokenUrl
- scopes
$ref: '#/$defs/specification-extensions'
unevaluatedProperties: false

authorization-code:
type: object
properties:
authorizationUrl:
type: string
format: uri-reference
tokenUrl:
type: string
format: uri-reference
refreshUrl:
type: string
format: uri-reference
scopes:
$ref: '#/$defs/map-of-strings'
required:
- authorizationUrl
- tokenUrl
- scopes
$ref: '#/$defs/specification-extensions'
unevaluatedProperties: false

device-authorization:
type: object
properties:
deviceAuthorizationUrl:
type: string
format: uri-reference
tokenUrl:
type: string
format: uri-reference
refreshUrl:
type: string
format: uri-reference
scopes:
$ref: '#/$defs/map-of-strings'
required:
- deviceAuthorizationUrl
- tokenUrl
- scopes
$ref: '#/$defs/specification-extensions'
unevaluatedProperties: false

specification-extensions:
$comment: https://spec.openapis.org/oas/v3.3#specification-extensions
patternProperties:
'^x-': true

additionalProperties:
$ref: '#/$defs/example-or-reference'
Comment on lines +219 to +225

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Something looks not quite right here. Looking a the 3.2 schema, I think the "additionalProperties" came from the "examples" def, so it probably shouldn't be here.


map-of-strings:
type: object
additionalProperties:
type: string
120 changes: 120 additions & 0 deletions src/security.md
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Expand Up @@ -10,6 +10,126 @@

TODO: Define the Security Specification.

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Should this line be deleted now that the Specification section has been added?


## Specification

### Security Scheme Object

Defines a security scheme that can be used by the operations.

Supported schemes are HTTP authentication, an API key (either as a header, a cookie parameter or as a query parameter), mutual TLS (use of a client certificate), OAuth2's common flows (implicit, password, client credentials and authorization code) as defined in [RFC6749](https://tools.ietf.org/html/rfc6749), OAuth2 device authorization flow as defined in [RFC8628](https://tools.ietf.org/html/rfc8628), and [[OpenID-Connect-Core]].
Please note that as of 2020, the implicit flow is about to be deprecated by [OAuth 2.0 Security Best Current Practice](https://tools.ietf.org/html/draft-ietf-oauth-security-topics). Recommended for most use cases is Authorization Code Grant flow with PKCE.

#### Fixed Fields

| Field Name | Type | Applies To | Description |
| ---- | :----: | ---- | ---- |
| <a name="security-scheme-type"></a>type | `string` | Any | **REQUIRED**. The type of the security scheme. Valid values are `"apiKey"`, `"http"`, `"mutualTLS"`, `"oauth2"`, `"openIdConnect"`. |
| <a name="security-scheme-description"></a>description | `string` | Any | A description for security scheme. [CommonMark syntax](https://spec.commonmark.org/) MAY be used for rich text representation. |
| <a name="security-scheme-name"></a>name | `string` | `apiKey` | **REQUIRED**. The name of the header, query or cookie parameter to be used. |
| <a name="security-scheme-in"></a>in | `string` | `apiKey` | **REQUIRED**. The location of the API key. Valid values are `"query"`, `"header"`, or `"cookie"`. |
| <a name="security-scheme-scheme"></a>scheme | `string` | `http` | **REQUIRED**. The name of the HTTP Authentication scheme to be used in the [Authorization header as defined in RFC9110](https://www.rfc-editor.org/rfc/rfc9110.html#section-16.4.1). The values used SHOULD be registered in the [IANA Authentication Scheme registry](https://www.iana.org/assignments/http-authschemes/http-authschemes.xhtml). The value is case-insensitive, as defined in [RFC9110](https://www.rfc-editor.org/rfc/rfc9110.html#section-11.1). |
| <a name="security-scheme-bearer-format"></a>bearerFormat | `string` | `http` (`"bearer"`) | A hint to the client to identify how the bearer token is formatted. Bearer tokens are usually generated by an authorization server, so this information is primarily for documentation purposes. |
| <a name="security-scheme-flows"></a>flows | [OAuth Flows Object](#oauth-flows-object) | `oauth2` | **REQUIRED**. An object containing configuration information for the flow types supported. |
| <a name="security-scheme-open-id-connect-url"></a>openIdConnectUrl | `string` | `openIdConnect` | **REQUIRED**. [Well-known URL](https://openid.net/specs/openid-connect-discovery-1_0.html#ProviderConfig) to discover the [[OpenID-Connect-Discovery]] [provider metadata](https://openid.net/specs/openid-connect-discovery-1_0.html#ProviderMetadata). |
| <a name="security-scheme-oauth2-metadata-url"></a>oauth2MetadataUrl | `string` | `oauth2` | URL to the OAuth2 authorization server metadata [RFC8414](https://datatracker.ietf.org/doc/html/rfc8414). TLS is required. |
| <a name="security-scheme-deprecated"></a>deprecated | `boolean` | Any | Declares this security scheme to be deprecated. Consumers SHOULD refrain from usage of the declared scheme. Default value is `false`. |

This object MAY be extended with [Specification Extensions](https://spec.openapis.org/oas/latest.html#specification-extensions).

#### Security Scheme Object Examples

##### Basic Authentication Example

```yaml
type: http
scheme: basic
```

##### API Key Example

```yaml
type: apiKey
name: api-key
in: header
```

##### JWT Bearer Example

```yaml
type: http
scheme: bearer
bearerFormat: JWT
```

##### MutualTLS Example

```yaml
type: mutualTLS
description: Cert must be signed by example.com CA
```

##### Implicit OAuth2 Example

```yaml
type: oauth2
flows:
implicit:
authorizationUrl: https://example.com/api/oauth/dialog
scopes:
write:pets: modify pets in your account
read:pets: read your pets
```

### OAuth Flows Object

Allows configuration of the supported OAuth Flows.

#### Fixed Fields

| Field Name | Type | Description |
| ---- | :----: | ---- |
| <a name="oauth-flows-implicit"></a>implicit | [OAuth Flow Object](#oauth-flow-object) | Configuration for the OAuth Implicit flow |
| <a name="oauth-flows-password"></a>password | [OAuth Flow Object](#oauth-flow-object) | Configuration for the OAuth Resource Owner Password flow |
| <a name="oauth-flows-client-credentials"></a>clientCredentials | [OAuth Flow Object](#oauth-flow-object) | Configuration for the OAuth Client Credentials flow. Previously called `application` in OpenAPI 2.0. |
| <a name="oauth-flows-authorization-code"></a>authorizationCode | [OAuth Flow Object](#oauth-flow-object) | Configuration for the OAuth Authorization Code flow. Previously called `accessCode` in OpenAPI 2.0. |
| <a name="oauth-flows-device-authorization"></a>deviceAuthorization | [OAuth Flow Object](#oauth-flow-object) | Configuration for the OAuth Device Authorization flow. |

This object MAY be extended with [Specification Extensions](https://spec.openapis.org/oas/latest.html#specification-extensions).

### OAuth Flow Object

Configuration details for a supported OAuth Flow

#### Fixed Fields

| Field Name | Type | Applies To | Description |
| ---- | :----: | ---- | ---- |
| <a name="oauth-flow-authorization-url"></a>authorizationUrl | `string` | `oauth2` (`"implicit"`, `"authorizationCode"`) | **REQUIRED**. The authorization URL to be used for this flow. This MUST be in the form of a URL. The OAuth2 standard requires the use of TLS. |
| <a name="oauth-flow-device-authorization-url"></a>deviceAuthorizationUrl | `string` | `oauth2` (`"deviceAuthorization"`) | **REQUIRED**. The device authorization URL to be used for this flow. This MUST be in the form of a URL. The OAuth2 standard requires the use of TLS. |
| <a name="oauth-flow-token-url"></a>tokenUrl | `string` | `oauth2` (`"password"`, `"clientCredentials"`, `"authorizationCode"`, `"deviceAuthorization"`) | **REQUIRED**. The token URL to be used for this flow. This MUST be in the form of a URL. The OAuth2 standard requires the use of TLS. |
| <a name="oauth-flow-refresh-url"></a>refreshUrl | `string` | `oauth2` | The URL to be used for obtaining refresh tokens. This MUST be in the form of a URL. The OAuth2 standard requires the use of TLS. |
| <a name="oauth-flow-scopes"></a>scopes | Map[`string`, `string`] | `oauth2` | **REQUIRED**. The available scopes for the OAuth2 security scheme. A map between the scope name and a short description for it. The map MAY be empty. |

This object MAY be extended with [Specification Extensions](https://spec.openapis.org/oas/latest.html#specification-extensions).

#### OAuth Flow Object Example

```yaml
type: oauth2
flows:
implicit:
authorizationUrl: https://example.com/api/oauth/dialog
scopes:
write:pets: modify pets in your account
read:pets: read your pets
authorizationCode:
authorizationUrl: https://example.com/api/oauth/dialog
tokenUrl: https://example.com/api/oauth/token
scopes:
write:pets: modify pets in your account
read:pets: read your pets
```

## Appendix A - Revision History

TODO: Document notable changes between versions.
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