Create crypto-utils.js

Signed-off-by: Mustapha BARKI <code4yo@gmail.com>

Author: akabarki76

packages/next/server/crypto-utils.js

@@ -0,0 +1,19 @@
+const MAX_BUFFER_SIZE = 1024; // 1KB
+
+function safeBufferConversion(input, encoding = 'hex') {
+  if (input.length > MAX_BUFFER_SIZE * 2 && encoding === 'hex') {
+    throw new SecurityError('Input exceeds maximum allowed size');
+  }
+  return Buffer.from(input, encoding);
+}
+
+class SecurityError extends Error {
+  constructor(message) {
+    super(message);
+    this.name = 'SecurityError';
+    // Remove stack trace for production
+    if (process.env.NODE_ENV === 'production') {
+      this.stack = undefined;
+    }
+  }
+}