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c++ - 解码 rsa 字符串时输出不正确

问题描述

我已经制作了这段代码，它正在加密字符串并将其转换为 base64 字符串（所以我可以复制它）。

void EncryptString(std::string data)
{
DWORD strlen = data.size() * sizeof(char);

unsigned char* buffer = new unsigned char[0];

buffer = (LPBYTE)malloc(strlen);

std::copy(data.begin(), data.end(), buffer);

DWORD lenght = 0;

if (!CryptEncrypt(hKey, 0, TRUE, 0, NULL, &lenght, NULL))
{
    ExitThread(0);
}

buffer = (LPBYTE)malloc(lenght);

if (!CryptEncrypt(hKey, 0, TRUE, 0, buffer, &strlen, lenght))
{
    ExitThread(0);
}

DWORD dlen2 = 0;
if (!CryptBinaryToString(buffer, lenght, CRYPT_STRING_BASE64, NULL, &dlen2))
{
    ExitThread(0);
}

TCHAR* tempo = new TCHAR[dlen2];

if (!CryptBinaryToString(buffer, lenght, CRYPT_STRING_BASE64, tempo, &dlen2))
{
    ExitThread(0);
}

for (int i = 0; i < dlen2; i++) 
{
    printf("%c", tempo[i]);
}
}

我得到这样的字符串：

li2b5qyVGbwJw6qAIitPRFI5BbRua2W0hJ1y6YLCKOOOkvQg3i4gZbUd3vaRzKRP F5rHd9HvGTxHX6hOsJah8LfBeftf3ZBrE+F/zcGKQqcENesrxNpm1yLZDtaJdMbZ JcdNcP/JoyVuvS2Gbc0I35chzBCRafwtRLD41aIdNfxnLw9+R4CQQ8BmKUUD8U7d 2wLIZzW+kPSWBLYw2JU69x0H8e2rA1AhJEqnGtypfeOKxTmOzvCzQQFaykp4vLyp t7MoIjArwhNqdpajKfVtu74hUmn2OgLX6FfO8x1bRs61NUnF9f2PniTzI4pyVAjx +MQioBwlro/xLjnOn4vppne6w4cbLzH8JIZC9Zqhn1LFGBE5fAlstlrv3onHfRdm yTvgLxGqFC8RdJ6uEuS10u7EBC/Whq4Ti4XpyET/ILmIHlZmK9mVICE7c95DirTS ejqNQNODmZtqgs4+sJLyFSZV3bkzKyIjrl9K1riAozLFdS8OeeAdbilEFpBXWLy9 5Q1xPkhRasauHMYRkv13pH58zaqcoHF/ThKHg+uPbY8dByfM/9v+igSK/fr88S49 iHam92vIpia+6SbJxilg+00jpMn+ZinLweHPG/kngbENbxFE4m9HbbZC9Vk8NAbG uMiVP8kL0UL5cuKxR771sav1tXQInNuJOKZ+g9qixlg =

当我尝试解密它时，我得到这样的字符串： 图片 我做错了什么？

解密：

void Decrypt()
{
DWORD dlen = 0;
if (!CryptStringToBinary(dataKey, strlen(dataKey), CRYPT_STRING_BASE64, NULL, &dlen, NULL, NULL))
{
    printf("Error while getting size... %d\n", GetLastError());
    exit(0);
}

BYTE* temp;
if (!(temp = (LPBYTE)malloc(dlen)))
{
    printf("Out of memory %d\n", GetLastError());
    exit(0);
}

if (!CryptStringToBinary(dataKey, strlen(dataKey), CRYPT_STRING_BASE64, temp, &dlen, NULL, NULL))
{
    printf("Error while converting to base64 string... %d\n", GetLastError());
    exit(0);
}

if (!CryptDecrypt(hKey, NULL, true, 0, temp, &dlen))
{
    printf("Can't get lenght! %d", GetLastError());
    exit(0);
}

for (DWORD i = 0; i < dlen; i++)
{
    printf("%c", temp[i]);
}
printf("\n");
}

标签： c++rsacryptoapi

解决方案

unsigned char buffer[512];代替unsigned char* buffer = new unsigned char[0];

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