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Merge pull request #172 from node-oauth/release-4.3.0
merge release 4.3.0 into master
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,77 @@ | ||
| 'use strict'; | ||
|
|
||
| /** | ||
| * Module dependencies. | ||
| */ | ||
| const { base64URLEncode } = require('../utils/string-util'); | ||
| const { createHash } = require('../utils/crypto-util'); | ||
| const codeChallengeRegexp = /^([a-zA-Z0-9.\-_~]){43,128}$/; | ||
| /** | ||
| * Export `TokenUtil`. | ||
| */ | ||
|
|
||
| const pkce = { | ||
| /** | ||
| * Return hash for code-challenge method-type. | ||
| * | ||
| * @param method {String} the code challenge method | ||
| * @param verifier {String} the code_verifier | ||
| * @return {String|undefined} | ||
| */ | ||
| getHashForCodeChallenge: function({ method, verifier }) { | ||
| // to prevent undesired side-effects when passing some wird values | ||
| // to createHash or base64URLEncode we first check if the values are right | ||
| if (pkce.isValidMethod(method) && typeof verifier === 'string' && verifier.length > 0) { | ||
| if (method === 'plain') { | ||
| return verifier; | ||
| } | ||
|
|
||
| if (method === 'S256') { | ||
| const hash = createHash({ data: verifier }); | ||
| return base64URLEncode(hash); | ||
| } | ||
| } | ||
| }, | ||
|
|
||
| /** | ||
| * Check if the request is a PCKE request. We assume PKCE if grant type is | ||
| * 'authorization_code' and code verifier is present. | ||
| * | ||
| * @param grantType {String} | ||
| * @param codeVerifier {String} | ||
| * @return {boolean} | ||
| */ | ||
| isPKCERequest: function ({ grantType, codeVerifier }) { | ||
| return grantType === 'authorization_code' && !!codeVerifier; | ||
| }, | ||
|
|
||
| /** | ||
| * Matches a code verifier (or code challenge) against the following criteria: | ||
| * | ||
| * code-verifier = 43*128unreserved | ||
| * unreserved = ALPHA / DIGIT / "-" / "." / "_" / "~" | ||
| * ALPHA = %x41-5A / %x61-7A | ||
| * DIGIT = %x30-39 | ||
| * | ||
| * @see: https://datatracker.ietf.org/doc/html/rfc7636#section-4.1 | ||
| * @param codeChallenge {String} | ||
| * @return {Boolean} | ||
| */ | ||
| codeChallengeMatchesABNF: function (codeChallenge) { | ||
| return typeof codeChallenge === 'string' && | ||
| !!codeChallenge.match(codeChallengeRegexp); | ||
| }, | ||
|
|
||
| /** | ||
| * Checks if the code challenge method is one of the supported methods | ||
| * 'sha256' or 'plain' | ||
| * | ||
| * @param method {String} | ||
| * @return {boolean} | ||
| */ | ||
| isValidMethod: function (method) { | ||
| return method === 'S256' || method === 'plain'; | ||
| } | ||
| }; | ||
|
|
||
| module.exports = pkce; |
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