[feat] risupreset file

src/ts/util.ts

@@ -309,4 +309,54 @@ export function getAuthorNoteDefaultText(){
     }
     return ''
 
+}
+
+export async function encryptBuffer(data:Uint8Array, keys:string){
+    // hash the key to get a fixed length key value
+    const keyArray = await window.crypto.subtle.digest("SHA-256", new TextEncoder().encode(keys))
+
+    const key = await window.crypto.subtle.importKey(
+        "raw",
+        keyArray,
+        "AES-GCM",
+        false,
+        ["encrypt", "decrypt"]
+    )
+
+    // use web crypto api to encrypt the data
+    const result = await window.crypto.subtle.encrypt(
+        {
+            name: "AES-GCM",
+            iv: new Uint8Array(12),
+        },
+        key,
+        data
+    )
+
+    return result
+}
+
+export async function decryptBuffer(data:Uint8Array, keys:string){
+    // hash the key to get a fixed length key value
+    const keyArray = await window.crypto.subtle.digest("SHA-256", new TextEncoder().encode(keys))
+
+    const key = await window.crypto.subtle.importKey(
+        "raw",
+        keyArray,
+        "AES-GCM",
+        false,
+        ["encrypt", "decrypt"]
+    )
+
+    // use web crypto api to encrypt the data
+    const result = await window.crypto.subtle.decrypt(
+        {
+            name: "AES-GCM",
+            iv: new Uint8Array(12),
+        },
+        key,
+        data
+    )
+
+    return result
 }