使用Microsoft CryptoAPI进行加密、解密、签名及验证(代码)

 

#include <stdio.h>

#include <windows.h>

#include <wincrypt.h>

#define MY_ENCODING_TYPE (PKCS_7_ASN_ENCODING | X509_ASN_ENCODING)

#define KEYLENGTH 0x00800000

void HandleError(char *s);

 

//--------------------------------------------------------------------

// These additional #define statements are required.

#define ENCRYPT_ALGORITHM CALG_RC4

#define ENCRYPT_BLOCK_SIZE 8

#define MAX_FILE_SIZE 4000000

#define SIGNATURE_SIZE 500

 

BYTE *pbKeyBlob; // 用来保存导出的公钥

DWORD dwBlobLen;

 

//   Declare the functions. The function definition

//   follows main.

BOOL VerifyFile (

                    PCHAR szSource,                         

                    PCHAR szDestination);

BOOL SignFile   (

                    PCHAR szSource,