Make issuer and verifier input more dynamic

Fixes #15

Signed-off-by: Mirko Mollik <[email protected]>

apps/issuer/package.json

@@ -40,6 +40,7 @@
     "dotenv": "^16.4.5",
     "express": "^4.19.2",
     "express-list-routes": "^1.2.1",
+    "joi": "^17.13.0",
     "jose": "^5.2.4",
     "passport-azure-ad": "^4.3.5",
     "passport-http-bearer": "^1.0.1",

apps/issuer/src/config.ts

@@ -0,0 +1,22 @@
+import Joi from 'joi';
+import 'dotenv/config';
+
+/**
+ * Define the environment variables schema
+ */
+const envVarsSchema = Joi.object()
+  .keys({
+    PORT: Joi.number().default(3000),
+    CONFIG_RELOAD: Joi.boolean().default(false),
+    ISSUER_BASE_URL: Joi.string().required(),
+    NODE_ENVIRONMENT: Joi.string()
+      .valid('development', 'production')
+      .default('development'),
+  })
+  .unknown();
+
+const { error, value: envVars } = envVarsSchema.validate(process.env);
+
+if (error) {
+  throw new Error(`Config validation error: ${error.message}`);
+}

apps/issuer/src/issuer.ts

@@ -5,12 +5,13 @@ import { CredentialSchema } from './types.js';
 
 /**
  * The issuer class is responsible for managing the credentials and the metadata of the issuer.
+ * In case the CONFIG_REALOD environment variable is set, the issuer will reload the configuration every time a method is called.
  */
 export class Issuer {
   /**
    * The metadata of the issuer.
    */
-  private metadata: CredentialIssuerMetadataOpts;
+  private metadata!: CredentialIssuerMetadataOpts;
 
   /**
    * The credentials supported by the issuer.
@@ -21,6 +22,10 @@ export class Issuer {
    * Creates a new instance of the issuer.
    */
   constructor() {
+    this.loadConfig();
+  }
+
+  private loadConfig() {
     //instead of reading at the beginning, we could implement a read on demand.
     this.metadata = JSON.parse(
       readFileSync(join('templates', 'metadata.json'), 'utf-8')
@@ -54,6 +59,9 @@ export class Issuer {
    * @returns
    */
   getCredential(id: string) {
+    if (process.env.CONFIG_RELOAD) {
+      this.loadConfig();
+    }
     const credential = this.credentials.get(id);
     if (!credential) {
       throw new Error(`The credential with the id ${id} is not supported.`);
@@ -67,6 +75,9 @@ export class Issuer {
    * @returns
    */
   getDisclosureFrame(id: string) {
+    if (process.env.CONFIG_RELOAD) {
+      this.loadConfig();
+    }
     const credential = this.credentials.get(id);
     if (!credential) {
       throw new Error(`The credential with the id ${id} is not supported.`);
@@ -78,6 +89,9 @@ export class Issuer {
    * Returns the metadata of the issuer.
    */
   getMetadata() {
+    if (process.env.CONFIG_RELOAD) {
+      this.loadConfig();
+    }
     return this.metadata;
   }
 }

apps/issuer/src/main.ts

@@ -1,3 +1,4 @@
+import './config.js';
 import { ES256, digest, generateSalt } from '@sd-jwt/crypto-nodejs';
 import { SDJwtVcInstance } from '@sd-jwt/sd-jwt-vc';
 import {
@@ -18,7 +19,7 @@ import {
 import { OID4VCIServer } from '@sphereon/oid4vci-issuer-server';
 import { SdJwtDecodedVerifiableCredentialPayload } from '@sphereon/ssi-types';
 import { DIDDocument } from 'did-resolver';
-import 'dotenv/config';
+
 import expressListRoutes from 'express-list-routes';
 import {
   JWK,

apps/issuer/tsconfig.json

@@ -11,5 +11,5 @@
     "strict": true /* Enable all strict type-checking options. */,
     "skipLibCheck": true /* Skip type checking all .d.ts files. */
   },
-  "include": ["src/**/*"]
+  "include": ["src/**/*", "src/config.ts"]
 }

apps/verifier/package.json

@@ -40,6 +40,7 @@
     "dotenv": "^16.4.5",
     "express": "^4.19.2",
     "express-list-routes": "^1.2.1",
+    "joi": "^17.13.0",
     "jose": "^5.2.4",
     "passport-azure-ad": "^4.3.5",
     "passport-http-bearer": "^1.0.1",

apps/verifier/src/RPManager.ts

@@ -1,7 +1,6 @@
 import { ES256, digest } from '@sd-jwt/crypto-nodejs';
 import {
   EcdsaSignature,
-  InMemoryRPSessionManager,
   JWK,
   JWTPayload,
   PassBy,
@@ -29,6 +28,7 @@ import { importJWK, jwtVerify } from 'jose';
 import { getKeys, getPublicKey } from './keys.js';
 import { EventEmitter } from 'node:events';
 import { RPInstance } from './types.js';
+import { InMemoryRPSessionManager } from './session-manager.js';
 
 // load the keys
 const { privateKey, publicKey } = await getKeys();
@@ -40,7 +40,9 @@ export const kid = did;
 // create the event emitter to listen to events.
 export const eventEmitter = new EventEmitter();
 //TODO: implement a persistant session manager so reloads don't lose state
-export const sessionManager = new InMemoryRPSessionManager(eventEmitter);
+export const sessionManager = new InMemoryRPSessionManager(eventEmitter, {
+  // maxAgeInSeconds: 10,
+});
 
 /**
  * The RPManager is responsible for managing the relying parties.
@@ -58,11 +60,36 @@ export class RPManager {
     let rp = this.rp.get(id);
     if (!rp) {
       rp = this.buildRP(id);
+      // checks every minute if the rp has active sessions. If there is none, the rp is removed. We want to do this so we can update the rp with new input without losing state. This approach could be improved since we are waiting around 4 minutes for the last finished request until the entries are removed.
+      setInterval(async () => {
+        this.remove(id);
+      }, 1000 * 60);
       this.rp.set(id, rp);
     }
     return rp;
   }
 
+  /**
+   * Removes a relying party. This is useful when the instance should be restarted with a new definition.
+   * @param id
+   */
+  async remove(id: string, force = false) {
+    const rp = this.rp.get(id);
+    if (!rp) {
+      return;
+    }
+    if (
+      !force &&
+      //the limit for a session is 5 minutes, so after this a session becomes idle an can be removed.
+      !(await (rp.rp.sessionManager as InMemoryRPSessionManager).isIdle())
+    ) {
+      // we have active sessions, we don't want to remove the rp. But at this point we do not know if they have already finished it. We just know they are not over the maximum defined limit (default 5 minutes).
+      return;
+    }
+    this.rp.delete(id);
+    console.log('Removed the rp');
+  }
+
   private buildRP(id: string) {
     // create the relying party
     const verifierFile = readFileSync(join('templates', `${id}.json`), 'utf-8');

apps/verifier/src/config.ts

@@ -0,0 +1,22 @@
+import Joi from 'joi';
+import 'dotenv/config';
+
+/**
+ * Define the environment variables schema
+ */
+const envVarsSchema = Joi.object()
+  .keys({
+    PORT: Joi.number().default(3000),
+    CONFIG_RELOAD: Joi.boolean().default(false),
+    VERIFIER_BASE_URL: Joi.string().required(),
+    NODE_ENVIRONMENT: Joi.string()
+      .valid('development', 'production')
+      .default('development'),
+  })
+  .unknown();
+
+const { error, value: envVars } = envVarsSchema.validate(process.env);
+
+if (error) {
+  throw new Error(`Config validation error: ${error.message}`);
+}

apps/verifier/src/main.ts

@@ -1,8 +1,8 @@
+import './config.js';
 import {
   PresentationDefinitionLocation,
   SupportedVersion,
 } from '@sphereon/did-auth-siop';
-import 'dotenv/config';
 import expressListRoutes from 'express-list-routes';
 import { v4 } from 'uuid';
 import { expressSupport } from './server.js';