非对称加密到底怎么样生成不同的密钥？找一天没找到边

[afairycell]

非对称加密到底怎么样生成不同的密钥？找一天没找到边

[书生]

CryptoAPI？？没怎么用过。

http://www.wangchao.net.cn/bbsdetail_66820.html

//Example

#include <wincrypt.h>
  
HCRYPTPROV hProv = 0;
HCRYPTKEY hKey = 0;
DWORD dwMode;
BYTE pbData[16];
DWORD dwCount;
DWORD i;

// Get handle to user default provider.
if(!CryptAcquireContext(&hProv, NULL, NULL, PROV_RSA_FULL, 0)) {
    printf("Error %x during CryptAcquireContext!\n", GetLastError());
    goto done;
}

// Create random block cipher session key.
if(!CryptGenKey(hProv, CALG_RC2, CRYPT_EXPORTABLE, &hKey)) {
    printf("Error %x during CryptGenKey!\n", GetLastError());

    goto done;
}

// Read the cipher mode.
dwCount = sizeof(DWORD);
if(!CryptGetKeyParam(hKey, KP_MODE, &dwMode, &dwCount, 0)) {
    printf("Error %x during CryptGetKeyParam!\n", GetLastError());
    goto done;
}
assert(dwCount==sizeof(BYTE));

// Print out cipher mode.
printf("Default cipher mode:%d\n", dwMode);

// Read initialization vector.
dwCount = 16;
if(!CryptGetKeyParam(hKey, KP_IV, pbData, &dwCount, 0)) {
    printf("Error %x during CryptGetKeyParam!\n", GetLastError());

    goto done;
}

// Print out initialization vector.
printf("Default IV:");
for(i=0;i<dwCount;i++) printf("%2.2x ",pbData[i]);
printf("\n");

done:

// Destroy session key.
if(hKey != 0) CryptDestroyKey(hKey);

// Release provider handle.
if(hProv != 0) CryptReleaseContext(hProv, 0);

Copy & Past 哈哈