Question

我想保护我的数据，所以我尝试用XXTEA加密它。我这样做：

inputString - ＆gt; XXTEA加密 - ＆gt; outputString
outputString - ＆gt; XXTEA解密 - ＆gt; inputString

所有内容都加密并解密。但是当我尝试在XXTEA加密后对其进行base64编码输出，并在XXTEA解密之前对base64进行解码，结果是错误的：

输入 - ＆gt; XXTEA加密 - ＆gt; base64编码 - ＆gt;输出
输出 - ＆gt; base64 decode - ＆gt; XXTEA解密！=输入

当我使用http://www.tools4noobs.com/online_tools/xxtea_encrypt/和http://www.tools4noobs.com/online_tools/xxtea_decrypt/

进行测试时

我的示例输入字符串为hello，其最终结果为bjz/S2f3Xkxr08hu

但是当我使用我的代码进行测试时（见下文），最终结果为bjz/Sw==

这是我的encryption code：

std::string ProjectUtils::encrypt_data_xxtea(std::string input, std::string secret) {
//Encrypt with XXTEA
xxtea_long retLength = 0;

unsigned char data[input.length()];
strncpy((char*)data, input.c_str(), sizeof(data));
xxtea_long dataLength = (xxtea_long) sizeof(data);

unsigned char key[secret.length()];
strncpy((char*)key, secret.c_str(), sizeof(key));
xxtea_long keyLength = (xxtea_long) sizeof(key);

unsigned char *encryptedData = xxtea_encrypt(data, dataLength, key, keyLength, &retLength);

//Encode base64
char* out = NULL;
base64Encode(encryptedData, sizeof(encryptedData), &out);

CCLOG("xxtea encrypted data: %s", out);
return out;

}

这是我的decryption code：

char* ProjectUtils::decrypt_data_xxtea(std::string input, std::string secret) {
//Decode base64
unsigned char* output = NULL;
base64Decode((unsigned char*)input.c_str(), (unsigned int)strlen(input.c_str()), &output);
xxtea_long dataLength = (xxtea_long) sizeof(output);

xxtea_long retLength = 0;

unsigned char key[secret.length()];
strncpy((char*)key, secret.c_str(), sizeof(key));
xxtea_long keyLength = (xxtea_long) sizeof(key);

//Decrypt with XXTEA
char *decryptedData = reinterpret_cast<char*>(xxtea_decrypt(output, dataLength, key, keyLength, &retLength));

CCLOG("xxtea decrypted data: %s", decryptedData);
return decryptedData;

}

你知道我的代码有什么问题吗？任何帮助，将不胜感激！非常感谢。

Answer 1

这是cocos2d-x 3.4上的完整工作代码

coordinates.length

Answer 2

感谢您的代码，它适用于我）

我已经用实际的retLength替换了base64字符串的长度

base64Encode(encryptedData, retLength, &out);

然后回来，获得实际尺寸

int outLength = cocos2d::base64Decode((unsigned char*)revertStr.c_str(), (unsigned int)strlen(revertStr.c_str()), &output);
char *decryptedData = reinterpret_cast<char*>(xxtea_decrypt(output, outLength, key, keyLength, &retLength));

Base64编码XXTEA加密字符串错误

2 个答案: