oauth2.js 18 KB

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  1. "use strict";
  2. /*
  3. * This auth adapter is based on the OAuth 2.0 Token Introspection specification.
  4. * See RFC 7662 for details (https://tools.ietf.org/html/rfc7662).
  5. * It's purpose is to validate OAuth2 access tokens using the OAuth2 provider's
  6. * token introspection endpoint (if implemented by the provider).
  7. *
  8. * The adapter accepts the following config parameters:
  9. *
  10. * 1. "tokenIntrospectionEndpointUrl" (string, required)
  11. * The URL of the token introspection endpoint of the OAuth2 provider that
  12. * issued the access token to the client that is to be validated.
  13. *
  14. * 2. "useridField" (string, optional)
  15. * The name of the field in the token introspection response that contains
  16. * the userid. If specified, it will be used to verify the value of the "id"
  17. * field in the "authData" JSON that is coming from the client.
  18. * This can be the "aud" (i.e. audience), the "sub" (i.e. subject) or the
  19. * "username" field in the introspection response, but since only the
  20. * "active" field is required and all other reponse fields are optional
  21. * in the RFC, it has to be optional in this adapter as well.
  22. * Default: - (undefined)
  23. *
  24. * 3. "appidField" (string, optional)
  25. * The name of the field in the token introspection response that contains
  26. * the appId of the client. If specified, it will be used to verify it's
  27. * value against the set of appIds in the adapter config. The concept of
  28. * appIds comes from the two major social login providers
  29. * (Google and Facebook). They have not yet implemented the token
  30. * introspection endpoint, but the concept can be valid for any OAuth2
  31. * provider.
  32. * Default: - (undefined)
  33. *
  34. * 4. "appIds" (array of strings, required if appidField is defined)
  35. * A set of appIds that are used to restrict accepted access tokens based
  36. * on a specific field's value in the token introspection response.
  37. * Default: - (undefined)
  38. *
  39. * 5. "authorizationHeader" (string, optional)
  40. * The value of the "Authorization" HTTP header in requests sent to the
  41. * introspection endpoint. It must contain the raw value.
  42. * Thus if HTTP Basic authorization is to be used, it must contain the
  43. * "Basic" string, followed by whitespace, then by the base64 encoded
  44. * version of the concatenated <username> + ":" + <password> string.
  45. * Eg. "Basic dXNlcm5hbWU6cGFzc3dvcmQ="
  46. *
  47. * The adapter expects requests with the following authData JSON:
  48. *
  49. * {
  50. * "someadapter": {
  51. * "id": "user's OAuth2 provider-specific id as a string",
  52. * "access_token": "an authorized OAuth2 access token for the user",
  53. * }
  54. * }
  55. */
  56. const Parse = require('parse/node').Parse;
  57. const querystring = require('querystring');
  58. const httpsRequest = require('./httpsRequest');
  59. const INVALID_ACCESS = 'OAuth2 access token is invalid for this user.';
  60. const INVALID_ACCESS_APPID = "OAuth2: the access_token's appID is empty or is not in the list of permitted appIDs in the auth configuration.";
  61. const MISSING_APPIDS = 'OAuth2 configuration is missing the client app IDs ("appIds" config parameter).';
  62. const MISSING_URL = 'OAuth2 token introspection endpoint URL is missing from configuration!';
  63. // Returns a promise that fulfills if this user id is valid.
  64. function validateAuthData(authData, options) {
  65. return requestTokenInfo(options, authData.access_token).then(response => {
  66. if (!response || !response.active || options.useridField && authData.id !== response[options.useridField]) {
  67. throw new Parse.Error(Parse.Error.OBJECT_NOT_FOUND, INVALID_ACCESS);
  68. }
  69. });
  70. }
  71. function validateAppId(appIds, authData, options) {
  72. if (!options || !options.appidField) {
  73. return Promise.resolve();
  74. }
  75. if (!appIds || appIds.length === 0) {
  76. throw new Parse.Error(Parse.Error.OBJECT_NOT_FOUND, MISSING_APPIDS);
  77. }
  78. return requestTokenInfo(options, authData.access_token).then(response => {
  79. if (!response || !response.active) {
  80. throw new Parse.Error(Parse.Error.OBJECT_NOT_FOUND, INVALID_ACCESS);
  81. }
  82. const appidField = options.appidField;
  83. if (!response[appidField]) {
  84. throw new Parse.Error(Parse.Error.OBJECT_NOT_FOUND, INVALID_ACCESS_APPID);
  85. }
  86. const responseValue = response[appidField];
  87. if (!Array.isArray(responseValue) && appIds.includes(responseValue)) {
  88. return;
  89. } else if (Array.isArray(responseValue) && responseValue.some(appId => appIds.includes(appId))) {
  90. return;
  91. } else {
  92. throw new Parse.Error(Parse.Error.OBJECT_NOT_FOUND, INVALID_ACCESS_APPID);
  93. }
  94. });
  95. }
  96. // A promise wrapper for requests to the OAuth2 token introspection endpoint.
  97. function requestTokenInfo(options, access_token) {
  98. if (!options || !options.tokenIntrospectionEndpointUrl) {
  99. throw new Parse.Error(Parse.Error.OBJECT_NOT_FOUND, MISSING_URL);
  100. }
  101. const parsedUrl = new URL(options.tokenIntrospectionEndpointUrl);
  102. const postData = querystring.stringify({
  103. token: access_token
  104. });
  105. const headers = {
  106. 'Content-Type': 'application/x-www-form-urlencoded',
  107. 'Content-Length': Buffer.byteLength(postData)
  108. };
  109. if (options.authorizationHeader) {
  110. headers['Authorization'] = options.authorizationHeader;
  111. }
  112. const postOptions = {
  113. hostname: parsedUrl.hostname,
  114. path: parsedUrl.pathname,
  115. method: 'POST',
  116. headers: headers
  117. };
  118. return httpsRequest.request(postOptions, postData);
  119. }
  120. module.exports = {
  121. validateAppId: validateAppId,
  122. validateAuthData: validateAuthData
  123. };
  124. //# sourceMappingURL=data:application/json;charset=utf-8;base64,{"version":3,"names":["Parse","require","querystring","httpsRequest","INVALID_ACCESS","INVALID_ACCESS_APPID","MISSING_APPIDS","MISSING_URL","validateAuthData","authData","options","requestTokenInfo","access_token","then","response","active","useridField","id","Error","OBJECT_NOT_FOUND","validateAppId","appIds","appidField","Promise","resolve","length","responseValue","Array","isArray","includes","some","appId","tokenIntrospectionEndpointUrl","parsedUrl","URL","postData","stringify","token","headers","Buffer","byteLength","authorizationHeader","postOptions","hostname","path","pathname","method","request","module","exports"],"sources":["../../../src/Adapters/Auth/oauth2.js"],"sourcesContent":["/*\n * This auth adapter is based on the OAuth 2.0 Token Introspection specification.\n * See RFC 7662 for details (https://tools.ietf.org/html/rfc7662).\n * It's purpose is to validate OAuth2 access tokens using the OAuth2 provider's\n * token introspection endpoint (if implemented by the provider).\n *\n * The adapter accepts the following config parameters:\n *\n * 1. \"tokenIntrospectionEndpointUrl\" (string, required)\n *      The URL of the token introspection endpoint of the OAuth2 provider that\n *      issued the access token to the client that is to be validated.\n *\n * 2. \"useridField\" (string, optional)\n *      The name of the field in the token introspection response that contains\n *      the userid. If specified, it will be used to verify the value of the \"id\"\n *      field in the \"authData\" JSON that is coming from the client.\n *      This can be the \"aud\" (i.e. audience), the \"sub\" (i.e. subject) or the\n *      \"username\" field in the introspection response, but since only the\n *      \"active\" field is required and all other reponse fields are optional\n *      in the RFC, it has to be optional in this adapter as well.\n *      Default: - (undefined)\n *\n * 3. \"appidField\" (string, optional)\n *      The name of the field in the token introspection response that contains\n *      the appId of the client. If specified, it will be used to verify it's\n *      value against the set of appIds in the adapter config. The concept of\n *      appIds comes from the two major social login providers\n *      (Google and Facebook). They have not yet implemented the token\n *      introspection endpoint, but the concept can be valid for any OAuth2\n *      provider.\n *      Default: - (undefined)\n *\n * 4. \"appIds\" (array of strings, required if appidField is defined)\n *      A set of appIds that are used to restrict accepted access tokens based\n *      on a specific field's value in the token introspection response.\n *      Default: - (undefined)\n *\n * 5. \"authorizationHeader\" (string, optional)\n *      The value of the \"Authorization\" HTTP header in requests sent to the\n *      introspection endpoint. It must contain the raw value.\n *      Thus if HTTP Basic authorization is to be used, it must contain the\n *      \"Basic\" string, followed by whitespace, then by the base64 encoded\n *      version of the concatenated <username> + \":\" + <password> string.\n *      Eg. \"Basic dXNlcm5hbWU6cGFzc3dvcmQ=\"\n *\n * The adapter expects requests with the following authData JSON:\n *\n * {\n *   \"someadapter\": {\n *     \"id\": \"user's OAuth2 provider-specific id as a string\",\n *     \"access_token\": \"an authorized OAuth2 access token for the user\",\n *   }\n * }\n */\n\nconst Parse = require('parse/node').Parse;\nconst querystring = require('querystring');\nconst httpsRequest = require('./httpsRequest');\n\nconst INVALID_ACCESS = 'OAuth2 access token is invalid for this user.';\nconst INVALID_ACCESS_APPID =\n  \"OAuth2: the access_token's appID is empty or is not in the list of permitted appIDs in the auth configuration.\";\nconst MISSING_APPIDS =\n  'OAuth2 configuration is missing the client app IDs (\"appIds\" config parameter).';\nconst MISSING_URL = 'OAuth2 token introspection endpoint URL is missing from configuration!';\n\n// Returns a promise that fulfills if this user id is valid.\nfunction validateAuthData(authData, options) {\n  return requestTokenInfo(options, authData.access_token).then(response => {\n    if (\n      !response ||\n      !response.active ||\n      (options.useridField && authData.id !== response[options.useridField])\n    ) {\n      throw new Parse.Error(Parse.Error.OBJECT_NOT_FOUND, INVALID_ACCESS);\n    }\n  });\n}\n\nfunction validateAppId(appIds, authData, options) {\n  if (!options || !options.appidField) {\n    return Promise.resolve();\n  }\n  if (!appIds || appIds.length === 0) {\n    throw new Parse.Error(Parse.Error.OBJECT_NOT_FOUND, MISSING_APPIDS);\n  }\n  return requestTokenInfo(options, authData.access_token).then(response => {\n    if (!response || !response.active) {\n      throw new Parse.Error(Parse.Error.OBJECT_NOT_FOUND, INVALID_ACCESS);\n    }\n    const appidField = options.appidField;\n    if (!response[appidField]) {\n      throw new Parse.Error(Parse.Error.OBJECT_NOT_FOUND, INVALID_ACCESS_APPID);\n    }\n    const responseValue = response[appidField];\n    if (!Array.isArray(responseValue) && appIds.includes(responseValue)) {\n      return;\n    } else if (\n      Array.isArray(responseValue) &&\n      responseValue.some(appId => appIds.includes(appId))\n    ) {\n      return;\n    } else {\n      throw new Parse.Error(Parse.Error.OBJECT_NOT_FOUND, INVALID_ACCESS_APPID);\n    }\n  });\n}\n\n// A promise wrapper for requests to the OAuth2 token introspection endpoint.\nfunction requestTokenInfo(options, access_token) {\n  if (!options || !options.tokenIntrospectionEndpointUrl) {\n    throw new Parse.Error(Parse.Error.OBJECT_NOT_FOUND, MISSING_URL);\n  }\n  const parsedUrl = new URL(options.tokenIntrospectionEndpointUrl);\n  const postData = querystring.stringify({\n    token: access_token,\n  });\n  const headers = {\n    'Content-Type': 'application/x-www-form-urlencoded',\n    'Content-Length': Buffer.byteLength(postData),\n  };\n  if (options.authorizationHeader) {\n    headers['Authorization'] = options.authorizationHeader;\n  }\n  const postOptions = {\n    hostname: parsedUrl.hostname,\n    path: parsedUrl.pathname,\n    method: 'POST',\n    headers: headers,\n  };\n  return httpsRequest.request(postOptions, postData);\n}\n\nmodule.exports = {\n  validateAppId: validateAppId,\n  validateAuthData: 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