iphone - AES解密示例代码

Question

从过去一周开始，我试图解密在 java 服务器中加密的数据，我的值如下

解密值-->管理员
密码-->2020a7db17ca8071de72ef439405b570
加密数据--f118404f2b7d98a744d2fa24c0d21167

我的代码是

 NSString* cipherText = @"f118404f2b7d98a744d2fa24c0d21167";
    NSLog(@"CipherText = %@",cipherText);
    NSString* expectedText = @"admin";
    NSLog(@"expexted text = %@",expectedText);
    Cipher* cipher = [[Cipher alloc] initWithKey:@"2020a7db17ca8071de72ef439405b570"];
    NSLog(@"cipher = %@",cipher);
    NSData* cipherTextData = [NSData dataWithBase64EncodedString:cipherText];
     NSLog(@"ciphertextdata= %@",cipherTextData);
    NSData* plainTextData = [cipher decrypt:cipherTextData];
     NSLog(@"plaintextdata= %@",plainTextData);
    NSString* plainText = [[NSString alloc] initWithData:plainTextData encoding:NSUTF8StringEncoding];
    NSLog(@"plaintext= %@",plainText);

但我无法获得价值cipherTextData和plainTextData。它总是显示为空。任何人请帮助