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"use strict"; var __importDefault = (this && this.__importDefault) || function (mod) { return (mod && mod.__esModule) ? mod : { "default": mod }; }; Object.defineProperty(exports, "__esModule", { value: true }); exports.createEntraTokenValidator = exports.JwtValidator = void 0; exports.decodeJwtPayload = decodeJwtPayload; const jsonwebtoken_1 = __importDefault(require("jsonwebtoken")); const jwks_rsa_1 = __importDefault(require("jwks-rsa")); const teams_common_1 = require("@microsoft/teams.common"); const asserts_1 = require("../../utils/asserts"); const DEFAULTS = { clockTolerance: 300 // 5 minutes }; function decodeJwtPayload(rawToken) { const payload = jsonwebtoken_1.default.decode(rawToken); if (!payload || typeof payload !== 'object') { return null; } return payload; } class JwtValidator { options; logger; jwksCache = new Map(); constructor(options, logger) { this.options = options; this.logger = logger?.child('jwt-validator') ?? new teams_common_1.ConsoleLogger('jwt-validator'); } /** * Validates a JWT token using the configured options */ async validateAccessToken(rawToken, overrideOptions) { if (!rawToken) { throw new Error('No token provided'); } return new Promise((resolve) => { const verifyOptions = { audience: [ this.options.clientId, `api://botid-${this.options.clientId}`, `api://${this.options.clientId}`, ...(this.options.audience ?? []), ], issuer: undefined, ignoreExpiration: false, algorithms: ['RS256'], clockTolerance: this.options.clockTolerance ?? DEFAULTS.clockTolerance }; this.logger?.debug('Validating JWT token with options:', { audience: verifyOptions.audience, clockTolerance: verifyOptions.clockTolerance, algorithms: verifyOptions.algorithms }); jsonwebtoken_1.default.verify(rawToken, this.getSigningKey.bind(this), verifyOptions, (err, decoded) => { if (err) { this.logger?.error('JWT verification failed:', err); resolve(null); return; } if (!decoded || typeof decoded !== 'object') { this.logger?.error('Decoded token is not a valid object:', decoded); resolve(null); return; } this.logger?.debug('JWT verification succeeded'); const payload = decoded; try { this.performCustomValidations(payload, overrideOptions); this.logger?.debug('Custom validations passed for token'); resolve(payload); } catch (validationError) { this.logger?.error('Custom validation failed:', validationError); resolve(null); } }); }); } getJwksClient() { switch (this.options.jwksUriOptions.type) { case 'tenantId': { const cachedClient = this.jwksCache.get(`${this.options.tenantId}`); if (cachedClient) { this.logger?.debug(`Using cached JWKS client for tenant ID: ${this.options.tenantId}`); return cachedClient; } const loginEndpoint = this.options.loginEndpoint ?? 'https://login.microsoftonline.com'; this.jwksCache.set(`${this.options.tenantId}`, (0, jwks_rsa_1.default)({ jwksUri: `${loginEndpoint}/${this.options.tenantId}/discovery/v2.0/keys`, })); return this.jwksCache.get(`${this.options.tenantId}`); } case 'uri': { const cachedClient = this.jwksCache.get(this.options.jwksUriOptions.uri); if (cachedClient) { this.logger?.debug(`Using cached JWKS client for URI: ${this.options.jwksUriOptions.uri}`); return cachedClient; } this.jwksCache.set(this.options.jwksUriOptions.uri, (0, jwks_rsa_1.default)({ jwksUri: this.options.jwksUriOptions.uri, })); return this.jwksCache.get(this.options.jwksUriOptions.uri); } default: (0, asserts_1.assertNever)(this.options.jwksUriOptions, `Unknown JWKS URI options type: ${this.options.jwksUriOptions}`); } } getSigningKey(header, callback) { const jwksClient = this.getJwksClient(); jwksClient?.getSigningKey(header.kid, (err, key) => { if (err) { this.logger?.error('Failed to get signing key:', err); callback(err, undefined); return; } const signingKey = key?.getPublicKey(); callback(null, signingKey); }); } validateIssuer(iss) { const validateIssuer = this.options.validateIssuer; if (!validateIssuer) { return; } // Check for allowedIssuer (exact match validation) if ('allowedIssuer' in validateIssuer) { if (!validateIssuer.allowedIssuer) { return; } if (!iss) { throw new Error('Token missing issuer claim'); } if (iss !== validateIssuer.allowedIssuer) { throw new Error(`Token issuer '${iss}' does not match allowed issuer '${validateIssuer.allowedIssuer}'`); } } // Check for allowedTenantIds (tenant-based validation) if ('allowedTenantIds' in validateIssuer) { if (!validateIssuer.allowedTenantIds?.length) { return; } if (!iss) { throw new Error('Token missing issuer claim'); } if (!this.options.tenantId) { throw new Error('Tenant ID is required when allowedTenantIds is configured'); } const isMultiTenant = ['common', 'organizations', 'consumers'].includes(this.options.tenantId); const allowedTenantIds = []; if (isMultiTenant) { for (const tenantId of validateIssuer.allowedTenantIds) { if (!['common', 'organizations', 'consumers'].includes(tenantId)) { allowedTenantIds.push(tenantId); } } } else { // For single-tenant apps, only allow tokens issued by this app's tenant allowedTenantIds.push(this.options.tenantId); } if (allowedTenantIds.length === 0) { return; } const issuerEndpoints = [ this.options.loginEndpoint ?? 'https://login.microsoftonline.com', 'https://sts.windows.net', ]; if (!allowedTenantIds.some((tenantId) => issuerEndpoints.some((endpoint) => iss.startsWith(`${endpoint}/${tenantId}/`)))) { throw new Error(`Token issuer '${iss}' not in allowed tenant IDs: ${allowedTenantIds.join(', ')}`); } } } validateScope(scp, overrideValidateScope) { const validateScope = overrideValidateScope || this.options.validateScope; if (validateScope) { const scopeSet = new Set((scp ?? '').split(' ')); if (!scopeSet.has(validateScope.requiredScope)) { throw new Error(`Token missing required scope: ${validateScope.requiredScope}`); } } } validateServiceUrl(serviceUrl, overrideValidateServiceUrl) { const validateServiceUrl = overrideValidateServiceUrl || this.options.validateServiceUrl; if (validateServiceUrl) { if (!serviceUrl) { throw new Error('Token missing serviceurl claim'); } const normalizedTokenUrl = serviceUrl.replace(/\/$/, '').toLowerCase(); const normalizedExpectedUrl = validateServiceUrl.expectedServiceUrl.replace(/\/$/, '').toLowerCase(); if (normalizedTokenUrl !== normalizedExpectedUrl) { throw new Error(`Service URL mismatch. Token: ${normalizedTokenUrl}, Expected: ${normalizedExpectedUrl}`); } } } performCustomValidations(payload, overrideOptions) { this.validateIssuer(payload.iss); this.validateScope(payload.scp, overrideOptions?.validateScope); this.validateServiceUrl(payload.serviceurl, overrideOptions?.validateServiceUrl); } } exports.JwtValidator = JwtValidator; // Factory functions for common scenarios const createEntraTokenValidator = (tenantId, clientId, options) => { return new JwtValidator({ clientId, tenantId, loginEndpoint: options?.loginEndpoint, audience: options?.applicationIdUri ? [options.applicationIdUri] : undefined, validateIssuer: { allowedTenantIds: options?.allowedTenantIds }, validateScope: options?.requiredScope ? { requiredScope: options.requiredScope } : undefined, jwksUriOptions: { type: 'tenantId' }, }, options?.logger); }; exports.createEntraTokenValidator = createEntraTokenValidator; //# 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