emma-lite/temp_patch.diff at main · techno-optimist/emma-lite · GitHub

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*** Begin Patch
*** Update File: js/emma-web-vault.js
@@
-      const key = await crypto.subtle.deriveKey(
-        {
-          name: 'PBKDF2'
-          salt: salt
-          iterations: 250000
-          hash: 'SHA-256'
-        },
-        keyMaterial,
-        { name: 'AES-GCM', length: 256 },
-        false
-        ['decrypt']
-      );
-
-      // Decrypt the data (EXACT same as extension)
-      const decrypted = await crypto.subtle.decrypt(
-        { name: 'AES-GCM', iv: iv },
-        key,
-        encrypted
-      );
+      const attempt = async (iterations) => {
+        const key = await crypto.subtle.deriveKey(
+          {
+            name: 'PBKDF2',
+            salt: salt,
+            iterations,
+            hash: 'SHA-256'
+          },
+          keyMaterial,
+          { name: 'AES-GCM', length: 256 },
+          false,
+          ['decrypt']
+        );
+        return await crypto.subtle.decrypt(
+          { name: 'AES-GCM', iv: iv },
+          key,
+          encrypted
+        );
+      };
+
+      // Try extension standard first (250k iterations), then fall back to older 100k iteration files
+      let decrypted;
+      try {
+        decrypted = await attempt(250000);
+      } catch (err) {
+        decrypted = await attempt(100000);
+      }
*** End Patch