87 lines
5.2 KiB
JavaScript
87 lines
5.2 KiB
JavaScript
/*! @azure/msal-node v3.8.0 2025-09-24 */
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'use strict';
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import { ManagedIdentityRequestParameters } from '../../config/ManagedIdentityRequestParameters.mjs';
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import { BaseManagedIdentitySource } from './BaseManagedIdentitySource.mjs';
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import { ManagedIdentityEnvironmentVariableNames, ManagedIdentitySourceNames, ManagedIdentityHeaders, ManagedIdentityQueryParameters, ManagedIdentityIdType, HttpMethod } from '../../utils/Constants.mjs';
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import { ImdsRetryPolicy } from '../../retry/ImdsRetryPolicy.mjs';
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/*
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* Copyright (c) Microsoft Corporation. All rights reserved.
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* Licensed under the MIT License.
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*/
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// Documentation for IMDS is available at https://docs.microsoft.com/azure/active-directory/managed-identities-azure-resources/how-to-use-vm-token#get-a-token-using-http
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const IMDS_TOKEN_PATH = "/metadata/identity/oauth2/token";
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const DEFAULT_IMDS_ENDPOINT = `http://169.254.169.254${IMDS_TOKEN_PATH}`;
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const IMDS_API_VERSION = "2018-02-01";
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/**
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* Original source of code: https://github.com/Azure/azure-sdk-for-net/blob/main/sdk/identity/Azure.Identity/src/ImdsManagedIdentitySource.cs
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*/
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class Imds extends BaseManagedIdentitySource {
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/**
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* Constructs an Imds instance.
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* @param logger - Logger instance for logging.
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* @param nodeStorage - NodeStorage instance for caching.
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* @param networkClient - Network client for HTTP requests.
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* @param cryptoProvider - CryptoProvider for cryptographic operations.
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* @param disableInternalRetries - Whether to disable internal retry logic.
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* @param identityEndpoint - The IMDS endpoint to use.
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*/
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constructor(logger, nodeStorage, networkClient, cryptoProvider, disableInternalRetries, identityEndpoint) {
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super(logger, nodeStorage, networkClient, cryptoProvider, disableInternalRetries);
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this.identityEndpoint = identityEndpoint;
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}
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/**
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* Attempts to create an Imds instance by determining the correct endpoint.
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* If the AZURE_POD_IDENTITY_AUTHORITY_HOST environment variable is set, it uses that as the endpoint.
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* Otherwise, it falls back to the default IMDS endpoint.
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*
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* @param logger - Logger instance for logging.
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* @param nodeStorage - NodeStorage instance for caching.
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* @param networkClient - Network client for HTTP requests.
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* @param cryptoProvider - CryptoProvider for cryptographic operations.
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* @param disableInternalRetries - Whether to disable internal retry logic.
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* @returns An instance of Imds configured with the appropriate endpoint.
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*/
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static tryCreate(logger, nodeStorage, networkClient, cryptoProvider, disableInternalRetries) {
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let validatedIdentityEndpoint;
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if (process.env[ManagedIdentityEnvironmentVariableNames
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.AZURE_POD_IDENTITY_AUTHORITY_HOST]) {
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logger.info(`[Managed Identity] Environment variable ${ManagedIdentityEnvironmentVariableNames.AZURE_POD_IDENTITY_AUTHORITY_HOST} for ${ManagedIdentitySourceNames.IMDS} returned endpoint: ${process.env[ManagedIdentityEnvironmentVariableNames
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.AZURE_POD_IDENTITY_AUTHORITY_HOST]}`);
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validatedIdentityEndpoint = Imds.getValidatedEnvVariableUrlString(ManagedIdentityEnvironmentVariableNames.AZURE_POD_IDENTITY_AUTHORITY_HOST, `${process.env[ManagedIdentityEnvironmentVariableNames
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.AZURE_POD_IDENTITY_AUTHORITY_HOST]}${IMDS_TOKEN_PATH}`, ManagedIdentitySourceNames.IMDS, logger);
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}
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else {
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logger.info(`[Managed Identity] Unable to find ${ManagedIdentityEnvironmentVariableNames.AZURE_POD_IDENTITY_AUTHORITY_HOST} environment variable for ${ManagedIdentitySourceNames.IMDS}, using the default endpoint.`);
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validatedIdentityEndpoint = DEFAULT_IMDS_ENDPOINT;
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}
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return new Imds(logger, nodeStorage, networkClient, cryptoProvider, disableInternalRetries, validatedIdentityEndpoint);
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}
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/**
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* Creates a ManagedIdentityRequestParameters object for acquiring a token from IMDS.
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* Sets the required headers and query parameters for the IMDS token request.
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*
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* @param resource - The resource URI for which the token is requested.
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* @param managedIdentityId - The managed identity ID (system-assigned or user-assigned).
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* @returns A ManagedIdentityRequestParameters object configured for IMDS.
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*/
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createRequest(resource, managedIdentityId) {
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const request = new ManagedIdentityRequestParameters(HttpMethod.GET, this.identityEndpoint);
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request.headers[ManagedIdentityHeaders.METADATA_HEADER_NAME] = "true";
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request.queryParameters[ManagedIdentityQueryParameters.API_VERSION] =
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IMDS_API_VERSION;
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request.queryParameters[ManagedIdentityQueryParameters.RESOURCE] =
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resource;
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if (managedIdentityId.idType !== ManagedIdentityIdType.SYSTEM_ASSIGNED) {
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request.queryParameters[this.getManagedIdentityUserAssignedIdQueryParameterKey(managedIdentityId.idType, true // indicates source is IMDS
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)] = managedIdentityId.id;
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}
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// The bodyParameters are calculated in BaseManagedIdentity.acquireTokenWithManagedIdentity.
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request.retryPolicy = new ImdsRetryPolicy();
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return request;
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}
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}
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export { Imds };
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//# sourceMappingURL=Imds.mjs.map
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