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Parse OAS3 HTTP-Auth schemes case-insensitively #1531

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@asazernik asazernik commented May 6, 2020

According to the authors of the OAI spec (OAI/OpenAPI-Specification#1880 (comment)), schemes are case-insensitive. Even if they were not, the current checks against lowercase versions of scheme names do not match the IANA registry's canonical versions (https://www.iana.org/assignments/http-authschemes/http-authschemes.xhtml#table-authschemes), which are "Basic" and "Bearer".

Description

Motivation and Context

If users are overly-adhering to the spec, they may copy-paste HTTP auth scheme names directly from the IANA registry. If they do, the request builder will omit the necessary headers, because it performs a case-sensitive comparison of the scheme name to a lower-case version.

How Has This Been Tested?

I have not yet tested this change.

Types of changes

  • No code changes (changes to documentation, CI, metadata, etc)
  • Dependency changes (any modification to dependencies in package.json)
  • Bug fix (non-breaking change which fixes an issue)
  • New feature (non-breaking change which adds functionality)
  • Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

  • My code follows the code style of this project.
  • My change requires a change to the documentation.
  • I have updated the documentation accordingly.
  • I have added tests to cover my changes.
  • All new and existing tests passed.

According to the authors of the OAI spec [1] schemes are
case-insensitive. Even if they were not, the current checks against
lowercase versions of scheme names do not match the IANA registry's
canonical versions [2] which are "Basic" and "Bearer".

[1] OAI/OpenAPI-Specification#1880 (comment)
[2] https://www.iana.org/assignments/http-authschemes/http-authschemes.xhtml#table-authschemes
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Thank you for your contribution and pointing out this issue! In order for this PR to be merge we need a tests case that will guarantee the case-insensitivity of the scheme. Would you be able to provide one?

@@ -147,14 +147,15 @@ export function applySecurities({request, securities = {}, operation = {}, spec}
}
}
else if (type === 'http') {
if (schema.scheme === 'basic') {
const scheme = schema.scheme && schema.scheme.toLowerCase()
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We should be able to use lodash toLower which returns and empty string of when provided a non-string argument.

import 'toLower' from 'lodash/toLower';
Suggested change
const scheme = schema.scheme && schema.scheme.toLowerCase()
const scheme = toLower(schema.scheme)

char0n added a commit that referenced this pull request Jun 18, 2020
As per RFC7235 auth scheme is case insensitive.

2.1. Challenge and Response

HTTP provides a simple challenge-response authentication framework
that can be used by a server to challenge a client request and by a
client to provide authentication information. It uses a case-
insensitive token as a means to identify the authentication scheme,
followed by additional information necessary for achieving.

https://tools.ietf.org/html/rfc7235#section-2.1

Refs #1531, #1473
Refs OAI/OpenAPI-Specification#1876
Refs swagger-api/swagger-ui#5965
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char0n commented Jun 18, 2020

Closing in favor of #1562

@char0n char0n closed this Jun 18, 2020
char0n added a commit that referenced this pull request Jun 18, 2020
As per RFC7235 auth scheme is case insensitive.

2.1. Challenge and Response

HTTP provides a simple challenge-response authentication framework
that can be used by a server to challenge a client request and by a
client to provide authentication information. It uses a case-
insensitive token as a means to identify the authentication scheme,
followed by additional information necessary for achieving.

https://tools.ietf.org/html/rfc7235#section-2.1

Refs #1531, #1473
Refs OAI/OpenAPI-Specification#1876
Refs swagger-api/swagger-ui#5965
char0n added a commit that referenced this pull request Jun 18, 2020
As per RFC7235 auth scheme is case insensitive.

2.1. Challenge and Response

HTTP provides a simple challenge-response authentication framework
that can be used by a server to challenge a client request and by a
client to provide authentication information. It uses a case-
insensitive token as a means to identify the authentication scheme,
followed by additional information necessary for achieving.

https://tools.ietf.org/html/rfc7235#section-2.1

Co-authored-by: Helen Kosova <[email protected]>

Refs #1531, #1473
Refs OAI/OpenAPI-Specification#1876
Refs swagger-api/swagger-ui#5965
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