fix: add missing methods to StorageService and SecureCredentialsService

- Added retrieveKeyFromBrowser(), retrievePlainKey(), retrieveEncryptedKey(), storeEncryptedKey() to StorageService
- Added promptForPassword() method to SecureCredentialsService
- Fixed error handling in storage.service.ts

src/services/credentials/storage.service.ts

@@ -126,6 +126,117 @@ export class StorageService {
     }
   }
 
+  /**
+   * Récupère une clé depuis le gestionnaire de mots de passe du navigateur
+   */
+  async retrieveKeyFromBrowser(): Promise<string | null> {
+    try {
+      const credentials = await navigator.credentials.get({
+        password: true,
+        mediation: 'required' as CredentialMediationRequirement
+      });
+
+      if (credentials && 'password' in credentials) {
+        return credentials.password || null;
+      }
+
+      return null;
+    } catch (error) {
+      secureLogger.error('Failed to retrieve key from browser', {
+        component: 'StorageService',
+        operation: 'retrieveKeyFromBrowser',
+        error: error instanceof Error ? error.message : String(error)
+      });
+      return null;
+    }
+  }
+
+  /**
+   * Récupère une clé en clair depuis IndexedDB
+   */
+  async retrievePlainKey(): Promise<string | null> {
+    try {
+      const db = await this.openDatabase();
+      const transaction = db.transaction([this.storeName], 'readonly');
+      const store = transaction.objectStore(this.storeName);
+
+      const result = await new Promise<string | null>((resolve, reject) => {
+        const request = store.get('plain-pbkdf2-key');
+        request.onsuccess = () => resolve(request.result || null);
+        request.onerror = () => reject(request.error);
+      });
+
+      return result;
+    } catch (error) {
+      secureLogger.error('Failed to retrieve plain key', {
+        component: 'StorageService',
+        operation: 'retrievePlainKey',
+        error: error instanceof Error ? error.message : String(error)
+      });
+      return null;
+    }
+  }
+
+  /**
+   * Récupère une clé chiffrée depuis IndexedDB
+   */
+  async retrieveEncryptedKey(): Promise<string | null> {
+    try {
+      const db = await this.openDatabase();
+      const transaction = db.transaction([this.storeName], 'readonly');
+      const store = transaction.objectStore(this.storeName);
+
+      const result = await new Promise<string | null>((resolve, reject) => {
+        const request = store.get('encrypted-pbkdf2-key');
+        request.onsuccess = () => resolve(request.result || null);
+        request.onerror = () => reject(request.error);
+      });
+
+      return result;
+    } catch (error) {
+      secureLogger.error('Failed to retrieve encrypted key', {
+        component: 'StorageService',
+        operation: 'retrieveEncryptedKey',
+        error: error instanceof Error ? error.message : String(error)
+      });
+      return null;
+    }
+  }
+
+  /**
+   * Stocke une clé chiffrée dans IndexedDB
+   */
+  async storeEncryptedKey(encryptedKey: string, securityMode?: string): Promise<void> {
+    try {
+      secureLogger.info('Storing encrypted key', {
+        component: 'StorageService',
+        operation: 'storeEncryptedKey'
+      });
+
+      const db = await this.openDatabase();
+      const transaction = db.transaction([this.storeName], 'readwrite');
+      const store = transaction.objectStore(this.storeName);
+
+      await new Promise<void>((resolve, reject) => {
+        const request = store.put(encryptedKey, 'encrypted-pbkdf2-key');
+        request.onsuccess = () => resolve();
+        request.onerror = () => reject(request.error);
+      });
+
+      secureLogger.info('Encrypted key stored successfully', {
+        component: 'StorageService',
+        operation: 'storeEncryptedKey'
+      });
+    } catch (error) {
+      secureLogger.error('Failed to store encrypted key', {
+        component: 'StorageService',
+        operation: 'storeEncryptedKey',
+        error: error instanceof Error ? error.message : String(error)
+      });
+      throw error;
+    }
+  }
+
   /**
    * Ouvre la base de données IndexedDB
    */
@@ -134,7 +245,8 @@ export class StorageService {
       const request = indexedDB.open(this.dbName, this.dbVersion);
 
       request.onerror = () => {
-        secureLogger.error('Failed to open IndexedDB', new Error('Database open failed'), {
+        const error = new Error('Database open failed');
+        secureLogger.error('Failed to open IndexedDB', error, {
           component: 'StorageService',
           operation: 'openDatabase'
         });

src/services/secure-credentials.service.ts

@@ -785,6 +785,20 @@ QR Code URL: ${qrUrl}`);
     return this.clearCredentials();
   }
 
+  /**
+   * Demande un mot de passe à l'utilisateur
+   */
+  private async promptForPassword(): Promise<string> {
+    return new Promise((resolve, reject) => {
+      const password = prompt('Entrez un mot de passe pour chiffrer la clé PBKDF2:');
+      if (password) {
+        resolve(password);
+      } else {
+        reject(new Error('Password prompt cancelled'));
+      }
+    });
+  }
+
   /**
    * Valide la force d'un mot de passe
    */