ADAL to MSAL (microsoft#4548)

libraries/botbuilder/package.json

@@ -28,6 +28,7 @@
   },
   "dependencies": {
     "@azure/ms-rest-js": "^2.7.0",
+    "@azure/msal-node": "^1.2.0",
     "axios": "^0.25.0",
     "botbuilder-core": "4.1.6",
     "botbuilder-stdlib": "4.1.6",

libraries/botframework-connector/package.json

@@ -30,7 +30,6 @@
     "@azure/identity": "^2.0.4",
     "@azure/ms-rest-js": "^2.7.0",
     "@azure/msal-node": "^1.2.0",
-    "adal-node": "0.2.3",
     "axios": "^0.25.0",
     "base64url": "^3.0.0",
     "botbuilder-stdlib": "4.1.6",

libraries/botframework-connector/src/auth/appCredentials.ts

@@ -7,24 +7,24 @@
  */
 
 import * as msrest from '@azure/ms-rest-js';
-import * as adal from 'adal-node';
+import { ConfidentialClientApplication } from '@azure/msal-node';
 import { AuthenticationConstants } from './authenticationConstants';
+import { AuthenticatorResult } from './authenticatorResult';
 
 /**
- * General AppCredentials auth implementation and cache. Supports any ADAL client credential flow.
+ * General AppCredentials auth implementation and cache.
  * Subclasses can implement refreshToken to acquire the token.
  */
 export abstract class AppCredentials implements msrest.ServiceClientCredentials {
-    private static readonly cache: Map<string, adal.TokenResponse> = new Map<string, adal.TokenResponse>();
+    private static readonly cache: Map<string, AuthenticatorResult> = new Map<string, AuthenticatorResult>();
 
     appId: string;
 
     private _oAuthEndpoint: string;
     private _oAuthScope: string;
     private _tenant: string;
     tokenCacheKey: string;
-    protected refreshingToken: Promise<adal.TokenResponse> | null = null;
-    protected authenticationContext: adal.AuthenticationContext;
+    protected clientApplication: ConfidentialClientApplication;
 
     // Protects against JSON.stringify leaking secrets
     private toJSON(): unknown {
@@ -104,7 +104,6 @@ export abstract class AppCredentials implements msrest.ServiceClientCredentials
         // aadApiVersion is set to '1.5' to avoid the "spn:" concatenation on the audience claim
         // For more info, see https://github.com/AzureAD/azure-activedirectory-library-for-nodejs/issues/128
         this._oAuthEndpoint = value;
-        this.authenticationContext = new adal.AuthenticationContext(value, true, undefined, '1.5');
     }
 
     /**
@@ -168,41 +167,30 @@ export abstract class AppCredentials implements msrest.ServiceClientCredentials
     async getToken(forceRefresh = false): Promise<string> {
         if (!forceRefresh) {
             // check the global cache for the token. If we have it, and it's valid, we're done.
-            const oAuthToken: adal.TokenResponse = AppCredentials.cache.get(this.tokenCacheKey);
-            if (oAuthToken) {
-                // we have the token. Is it valid?
-                if (oAuthToken.expirationTime > Date.now()) {
-                    return oAuthToken.accessToken;
-                }
+            const oAuthToken = AppCredentials.cache.get(this.tokenCacheKey);
+            // Check if the token is not expired.
+            if (oAuthToken && oAuthToken.expiresOn > new Date()) {
+                return oAuthToken.accessToken;
             }
         }
 
         // We need to refresh the token, because:
         // 1. The user requested it via the forceRefresh parameter
         // 2. We have it, but it's expired
         // 3. We don't have it in the cache.
-        const res: adal.TokenResponse = await this.refreshToken();
-        this.refreshingToken = null;
+        const res = await this.refreshToken();
 
         if (res && res.accessToken) {
-            // `res` is equalivent to the results from the cached promise `this.refreshingToken`.
-            // Because the promise has been cached, we need to see if the body has been read.
-            // If the body has not been read yet, we can call res.json() to get the access_token.
-            // If the body has been read, the OAuthResponse for that call should have been cached already,
-            // in which case we can return the cache from there. If a cached OAuthResponse does not exist,
-            // call getToken() again to retry the authentication process.
-
-            // Subtract 5 minutes from expires_in so they'll we'll get a
-            // new token before it expires.
-            res.expirationTime = Date.now() + res.expiresIn * 1000 - 300000;
+            // Subtract 5 minutes from expiresOn so they'll we'll get a new token before it expires.
+            res.expiresOn.setMinutes(res.expiresOn.getMinutes() - 5);
             AppCredentials.cache.set(this.tokenCacheKey, res);
             return res.accessToken;
         } else {
-            throw new Error('Authentication: No response or error received from ADAL.');
+            throw new Error('Authentication: No response or error received from MSAL.');
         }
     }
 
-    protected abstract refreshToken(): Promise<adal.TokenResponse>;
+    protected abstract refreshToken(): Promise<AuthenticatorResult>;
 
     /**
      * @private

libraries/botframework-connector/src/auth/authenticatorResult.ts

@@ -0,0 +1,18 @@
+/**
+ * Copyright (c) Microsoft Corporation. All rights reserved.
+ * Licensed under the MIT License.
+ */
+
+/**
+ * Contains tokens and metadata upon successful completion of an acquireToken call.
+ */
+export interface AuthenticatorResult {
+    /**
+     * The value of the access token resulting from an authentication process.
+     */
+    accessToken: string;
+    /**
+     *  The date and time of expiration relative to Coordinated Universal Time (UTC).
+     */
+    expiresOn: Date;
+}

libraries/botframework-connector/src/auth/certificateAppCredentials.ts

@@ -6,15 +6,20 @@
  * Licensed under the MIT License.
  */
 
-import * as adal from 'adal-node';
+import { ConfidentialClientApplication } from '@azure/msal-node';
 import { AppCredentials } from './appCredentials';
+import { AuthenticatorResult } from './authenticatorResult';
+import { MsalAppCredentials } from './msalAppCredentials';
 
 /**
  * CertificateAppCredentials auth implementation
  */
 export class CertificateAppCredentials extends AppCredentials {
     certificateThumbprint: string;
     certificatePrivateKey: string;
+    x5c: string;
+
+    private credentials: MsalAppCredentials;
 
     /**
      * Initializes a new instance of the [CertificateAppCredentials](xref:botframework-connector.CertificateAppCredentials) class.
@@ -24,37 +29,55 @@ export class CertificateAppCredentials extends AppCredentials {
      * @param certificatePrivateKey A PEM encoded certificate private key.
      * @param channelAuthTenant Optional. The oauth token tenant.
      * @param oAuthScope Optional. The scope for the token.
+     * @param x5c Optional. Enables application developers to achieve easy certificates roll-over in Azure AD:
+     * set this parameter to send the public certificate (BEGIN CERTIFICATE) to Azure AD, so that Azure AD can use it to validate the subject name based on a trusted issuer policy.
      */
     constructor(
         appId: string,
         certificateThumbprint: string,
         certificatePrivateKey: string,
         channelAuthTenant?: string,
-        oAuthScope?: string
+        oAuthScope?: string,
+        x5c?: string
     ) {
         super(appId, channelAuthTenant, oAuthScope);
         this.certificateThumbprint = certificateThumbprint;
         this.certificatePrivateKey = certificatePrivateKey;
+        this.x5c = x5c;
+    }
+
+    /**
+     * @inheritdoc
+     */
+    async getToken(forceRefresh = false): Promise<string> {
+        this.credentials ??= new MsalAppCredentials(
+            this.createClientApplication(),
+            this.appId,
+            this.oAuthEndpoint,
+            this.oAuthScope
+        );
+        return this.credentials.getToken(forceRefresh);
+    }
+
+    /**
+     * @inheritdoc
+     */
+    protected refreshToken(): Promise<AuthenticatorResult> {
+        // This will never be executed because we are using MsalAppCredentials.getToken underneath.
+        throw new Error('Method not implemented.');
     }
 
-    protected async refreshToken(): Promise<adal.TokenResponse> {
-        if (!this.refreshingToken) {
-            this.refreshingToken = new Promise<adal.TokenResponse>((resolve, reject) => {
-                this.authenticationContext.acquireTokenWithClientCertificate(
-                    this.oAuthScope,
-                    this.appId,
-                    this.certificatePrivateKey,
-                    this.certificateThumbprint,
-                    function (err, tokenResponse) {
-                        if (err) {
-                            reject(err);
-                        } else {
-                            resolve(tokenResponse as adal.TokenResponse);
-                        }
-                    }
-                );
-            });
-        }
-        return this.refreshingToken;
+    private createClientApplication() {
+        return new ConfidentialClientApplication({
+            auth: {
+                clientId: this.appId,
+                authority: this.oAuthEndpoint,
+                clientCertificate: {
+                    thumbprint: this.certificateThumbprint,
+                    privateKey: this.certificatePrivateKey,
+                    x5c: this.x5c,
+                },
+            },
+        });
     }
 }

libraries/botframework-connector/src/auth/certificateServiceClientCredentialsFactory.ts

@@ -19,6 +19,7 @@ export class CertificateServiceClientCredentialsFactory extends ServiceClientCre
     private readonly certificateThumbprint: string;
     private readonly certificatePrivateKey: string;
     private readonly tenantId: string | null;
+    private readonly x5c: string | null;
 
     /**
      * Initializes a new instance of the CertificateServiceClientCredentialsFactory class.
@@ -27,8 +28,16 @@ export class CertificateServiceClientCredentialsFactory extends ServiceClientCre
      * @param certificateThumbprint A hex encoded thumbprint of the certificate.
      * @param certificatePrivateKey A PEM encoded certificate private key.
      * @param tenantId Optional. The oauth token tenant.
+     * @param x5c Optional. Enables application developers to achieve easy certificates roll-over in Azure AD:
+     * set this parameter to send the public certificate (BEGIN CERTIFICATE) to Azure AD, so that Azure AD can use it to validate the subject name based on a trusted issuer policy.
      */
-    constructor(appId: string, certificateThumbprint: string, certificatePrivateKey: string, tenantId?: string) {
+    constructor(
+        appId: string,
+        certificateThumbprint: string,
+        certificatePrivateKey: string,
+        tenantId?: string,
+        x5c?: string
+    ) {
         super();
         ok(appId?.trim(), 'CertificateServiceClientCredentialsFactory.constructor(): missing appId.');
         ok(
@@ -44,6 +53,7 @@ export class CertificateServiceClientCredentialsFactory extends ServiceClientCre
         this.certificateThumbprint = certificateThumbprint;
         this.certificatePrivateKey = certificatePrivateKey;
         this.tenantId = tenantId;
+        this.x5c = x5c;
     }
 
     /**
@@ -75,7 +85,8 @@ export class CertificateServiceClientCredentialsFactory extends ServiceClientCre
             this.certificateThumbprint,
             this.certificatePrivateKey,
             this.tenantId,
-            audience
+            audience,
+            this.x5c
         );
     }
 }

libraries/botframework-connector/src/auth/index.ts

@@ -8,10 +8,11 @@
 
 export * from './allowedCallersClaimsValidator';
 export * from './appCredentials';
+export * from './authenticateRequestResult';
 export * from './authenticationConfiguration';
 export * from './authenticationConstants';
 export * from './authenticationError';
-export * from './authenticateRequestResult';
+export * from './authenticatorResult';
 export * from './botFrameworkAuthentication';
 export * from './botFrameworkAuthenticationFactory';
 export * from './certificateAppCredentials';
@@ -32,8 +33,8 @@ export * from './managedIdentityAuthenticator';
 export * from './managedIdentityServiceClientCredentialsFactory';
 export * from './microsoftAppCredentials';
 export * from './passwordServiceClientCredentialFactory';
-export * from './skillValidation';
 export * from './serviceClientCredentialsFactory';
+export * from './skillValidation';
 export * from './userTokenClient';
 
 export { MsalAppCredentials } from './msalAppCredentials';

libraries/botframework-connector/src/auth/managedIdentityAppCredentials.ts

@@ -6,11 +6,11 @@
  * Licensed under the MIT License.
  */
 
+import { ok } from 'assert';
 import { AppCredentials } from './appCredentials';
 import type { IJwtTokenProviderFactory } from './jwtTokenProviderFactory';
 import { ManagedIdentityAuthenticator } from './managedIdentityAuthenticator';
-import { TokenResponse } from 'adal-node';
-import { ok } from 'assert';
+import { AuthenticatorResult } from './authenticatorResult';
 
 /**
  * Managed Service Identity auth implementation.
@@ -40,14 +40,11 @@ export class ManagedIdentityAppCredentials extends AppCredentials {
     /**
      * @inheritdoc
      */
-    protected async refreshToken(): Promise<TokenResponse> {
+    protected async refreshToken(): Promise<AuthenticatorResult> {
         const token = await this.authenticator.getToken();
         return {
             accessToken: token.token,
             expiresOn: new Date(token.expiresOnTimestamp),
-            tokenType: 'Bearer',
-            expiresIn: (token.expiresOnTimestamp - Date.now()) / 1000,
-            resource: this.oAuthScope,
         };
     }
 }

libraries/botframework-connector/src/auth/microsoftAppCredentials.ts

@@ -6,18 +6,9 @@
  * Licensed under the MIT License.
  */
 
-import * as adal from 'adal-node';
 import { AppCredentials } from './appCredentials';
-
-// Determines if an unknown value is of adal.ErrorResponse type
-function isErrorResponse(value: unknown): value is adal.ErrorResponse {
-    if (value) {
-        const { error, errorDescription } = value as adal.ErrorResponse;
-        return error != null && errorDescription != null;
-    }
-
-    return false;
-}
+import { AuthenticatorResult } from './authenticatorResult';
+import { MsalAppCredentials } from './msalAppCredentials';
 
 /**
  * MicrosoftAppCredentials auth implementation
@@ -28,6 +19,8 @@ export class MicrosoftAppCredentials extends AppCredentials {
      */
     static readonly Empty = new MicrosoftAppCredentials(null, null);
 
+    private credentials: MsalAppCredentials;
+
     /**
      * Initializes a new instance of the [MicrosoftAppCredentials](xref:botframework-connector.MicrosoftAppCredentials) class.
      *
@@ -40,26 +33,19 @@ export class MicrosoftAppCredentials extends AppCredentials {
         super(appId, channelAuthTenant, oAuthScope);
     }
 
-    protected async refreshToken(): Promise<adal.TokenResponse> {
-        if (!this.refreshingToken) {
-            this.refreshingToken = new Promise<adal.TokenResponse>((resolve, reject): void => {
-                this.authenticationContext.acquireTokenWithClientCredentials(
-                    this.oAuthScope,
-                    this.appId,
-                    this.appPassword,
-                    (err, tokenResponse) => {
-                        if (err) {
-                            reject(err);
-                        } else if (isErrorResponse(tokenResponse)) {
-                            reject(new Error(tokenResponse.error));
-                        } else {
-                            resolve(tokenResponse);
-                        }
-                    }
-                );
-            });
-        }
+    /**
+     * @inheritdoc
+     */
+    async getToken(forceRefresh = false): Promise<string> {
+        this.credentials ??= new MsalAppCredentials(this.appId, this.appPassword, this.oAuthEndpoint, this.oAuthScope);
+        return this.credentials.getToken(forceRefresh);
+    }
 
-        return this.refreshingToken;
+    /**
+     * @inheritdoc
+     */
+    protected refreshToken(): Promise<AuthenticatorResult> {
+        // This will never be executed because we are using MsalAppCredentials.getToken underneath.
+        throw new Error('Method not implemented.');
     }
 }