如何解决“ dataPaddingRequired”错误CryptoSwift

Question

我有key = "somesomesomesome".md5()，长度为32个字节，iv为空，尝试使用CryptoSwift解密加密的字符串：

let aes = try AES(key: key.bytes, blockMode: CBC(iv: []), padding: .noPadding)
let result = try aes.decrypt(encrypted)
let decrypted = String(bytes: result, encoding: .utf8)

获取错误“ dataPaddingRequired”。我在做什么错了？