1

assets/script/game/GameData.ts

@@ -326,12 +326,12 @@ export class GameData extends Singleton {
         if (!s || s.length % 4 !== 0) return false;
         if (!/^[A-Za-z0-9+/]+={0,2}$/.test(s)) return false;
         try {
-            if (typeof atob !== 'function') return false;
-            const bin = atob(s);
+            const bin = this._base64Decode(s);
+            if (!bin) return false;
             for (let i = 0; i < bin.length; i++) {
                 const c = bin.charCodeAt(i);
                 if (c < 32 && c !== 9 && c !== 10 && c !== 13) return false;
-                if (c === 127 || c === 0xFFFD) return false;
+                if (c === 127) return false;
             }
             return true;
         } catch {
@@ -339,6 +339,28 @@ export class GameData extends Singleton {
         }
     }
 
+    /** Base64 → latin1 字符串（不依赖 atob，小游戏环境兜底）；非法输入返回空串 */
+    private _base64Decode(b64: string): string {
+        const chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
+        const lookup: Record<string, number> = {};
+        for (let i = 0; i < chars.length; i++) lookup[chars.charAt(i)] = i;
+        const clean = b64.replace(/=+$/, '');
+        let out = '';
+        let buffer = 0;
+        let bits = 0;
+        for (let i = 0; i < clean.length; i++) {
+            const v = lookup[clean.charAt(i)];
+            if (v === undefined) return '';
+            buffer = (buffer << 6) | v;
+            bits += 6;
+            if (bits >= 8) {
+                bits -= 8;
+                out += String.fromCharCode((buffer >> bits) & 255);
+            }
+        }
+        return out;
+    }
+
     /** UTF-8 → Base64（无 btoa 环境走手写实现；编码失败返回原文避免丢昵称） */
     private _utf8ToBase64(s: string): string {
         const chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';