fix: Corriger l'erreur d'algorithme dans la dérivation des clés

- Remplacer deriveBits PBKDF2 par HMAC pour dériver les clés spend et scan
- Résoudre l'erreur 'key.algorithm does not match that of operation'
- Utiliser HMAC-SHA256 avec la clé maître pour dériver les clés spécifiques
- Maintenir la sécurité cryptographique avec une approche compatible

src/services/secure-credentials.service.ts

@@ -272,15 +272,19 @@ export class SecureCredentialsService {
   private async deriveSpendKey(masterKey: CryptoKey, salt: Uint8Array): Promise<string> {
     const spendSalt = new Uint8Array([...salt, 0x73, 0x70, 0x65, 0x6e, 0x64]); // "spend"
 
-    const spendKeyMaterial = await crypto.subtle.deriveBits(
+    // Use HMAC with the master key to derive spend key
-      {
+    const hmacKey = await crypto.subtle.importKey(
-        name: 'PBKDF2',
+      'raw',
-        salt: spendSalt,
+      await crypto.subtle.exportKey('raw', masterKey),
-        iterations: 1000,
+      { name: 'HMAC', hash: 'SHA-256' },
-        hash: 'SHA-256'
+      false,
-      },
+      ['sign']
-      masterKey,
+    );
-      256
+
+    const spendKeyMaterial = await crypto.subtle.sign(
+      'HMAC',
+      hmacKey,
+      spendSalt
     );
 
     return Array.from(new Uint8Array(spendKeyMaterial))
@@ -294,15 +298,19 @@ export class SecureCredentialsService {
   private async deriveScanKey(masterKey: CryptoKey, salt: Uint8Array): Promise<string> {
     const scanSalt = new Uint8Array([...salt, 0x73, 0x63, 0x61, 0x6e]); // "scan"
 
-    const scanKeyMaterial = await crypto.subtle.deriveBits(
+    // Use HMAC with the master key to derive scan key
-      {
+    const hmacKey = await crypto.subtle.importKey(
-        name: 'PBKDF2',
+      'raw',
-        salt: scanSalt,
+      await crypto.subtle.exportKey('raw', masterKey),
-        iterations: 1000,
+      { name: 'HMAC', hash: 'SHA-256' },
-        hash: 'SHA-256'
+      false,
-      },
+      ['sign']
-      masterKey,
+    );
-      256
+
+    const scanKeyMaterial = await crypto.subtle.sign(
+      'HMAC',
+      hmacKey,
+      scanSalt
     );
 
     return Array.from(new Uint8Array(scanKeyMaterial))