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[转载图文] C/C++ 常用加解密算法收集

发表于 2020-6-15 20:56:02 | 查看: 4470| 回复: 0
　　网上收集的一些开发常用的加密解密算法的使用技巧，第三方库 Crypto++ 也可实现
Base64加密1　　base64.h
#ifndef base64_h
#define base64_h

#include <stdio.h>
#include <Windows.h>
#include <stdlib.h>

#if __cplusplus
extern "C"{
#endif
// base64 转换表, 共64个
static const char base64_alphabet[] = {
'A', 'B', 'C', 'D', 'E', 'F', 'G',
'H', 'I', 'J', 'K', 'L', 'M', 'N',
'O', 'P', 'Q', 'R', 'S', 'T',
'U', 'V', 'W', 'X', 'Y', 'Z',
'a', 'b', 'c', 'd', 'e', 'f', 'g',
'h', 'i', 'j', 'k', 'l', 'm', 'n',
'o', 'p', 'q', 'r', 's', 't',
'u', 'v', 'w', 'x', 'y', 'z',
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
'+', '/' };

// 解码时使用
static const unsigned char base64_suffix_map[256] = {
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 253, 255,
255, 253, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 253, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 62, 255, 255, 255, 63,
52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 255, 255,
255, 254, 255, 255, 255, 0, 1, 2, 3, 4, 5, 6,
7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18,
19, 20, 21, 22, 23, 24, 25, 255, 255, 255, 255, 255,
255, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36,
37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48,
49, 50, 51, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255 };

static char cmove_bits(unsigned char src, unsigned lnum, unsigned rnum) {
src <<= lnum; // src = src << lnum;
src >>= rnum; // src = src >> rnum;
return src;
}

int base64_encode(const char *indata, int inlen, char *outdata, int *outlen) {

int ret = 0; // return value
if (indata == NULL || inlen == 0) {
return ret = -1;
}

int in_len = 0; // 源字符串长度, 如果in_len不是3的倍数, 那么需要补成3的倍数
int pad_num = 0; // 需要补齐的字符个数, 这样只有2, 1, 0(0的话不需要拼接, )
if (inlen % 3 != 0) {
pad_num = 3 - inlen % 3;
}
in_len = inlen + pad_num; // 拼接后的长度, 实际编码需要的长度(3的倍数)
int out_len = in_len * 8 / 6; // 编码后的长度
char *p = outdata; // 定义指针指向传出data的首地址

//编码, 长度为调整后的长度, 3字节一组
for (int i = 0; i < in_len; i += 3) {
int value = *indata >> 2; // 将indata第一个字符向右移动2bit(丢弃2bit)
char c = base64_alphabet[value]; // 对应base64转换表的字符
*p = c; // 将对应字符(编码后字符)赋值给outdata第一字节

//处理最后一组(最后3字节)的数据
if (i == inlen + pad_num - 3 && pad_num != 0) {
if (pad_num == 1) {
*(p + 1) = base64_alphabet[(int)(cmove_bits(*indata, 6, 2) + cmove_bits(*(indata + 1), 0, 4))];
*(p + 2) = base64_alphabet[(int)cmove_bits(*(indata + 1), 4, 2)];
*(p + 3) = '=';
}
else if (pad_num == 2) { // 编码后的数据要补两个 '='
*(p + 1) = base64_alphabet[(int)cmove_bits(*indata, 6, 2)];
*(p + 2) = '=';
*(p + 3) = '=';
}
}
else { // 处理正常的3字节的数据
*(p + 1) = base64_alphabet[cmove_bits(*indata, 6, 2) + cmove_bits(*(indata + 1), 0, 4)];
*(p + 2) = base64_alphabet[cmove_bits(*(indata + 1), 4, 2) + cmove_bits(*(indata + 2), 0, 6)];
*(p + 3) = base64_alphabet[*(indata + 2) & 0x3f];
}
p += 4;
indata += 3;
}
if (outlen != NULL) {
*outlen = out_len;
}
return ret;
}

int base64_decode(const char *indata, int inlen, char *outdata, int *outlen) {

int ret = 0;
if (indata == NULL || inlen <= 0 || outdata == NULL || outlen == NULL) {
return ret = -1;
}
if (inlen % 4 != 0) { // 需要解码的数据不是4字节倍数
return ret = -2;
}

int t = 0, x = 0, y = 0, i = 0;
unsigned char c = 0;
int g = 3;

while (indata[x] != 0) {
// 需要解码的数据对应的ASCII值对应base64_suffix_map的值
c = base64_suffix_map[indata[x++]];
if (c == 255) return -1;// 对应的值不在转码表中
if (c == 253) continue;// 对应的值是换行或者回车
if (c == 254) { c = 0; g--; }// 对应的值是'='
t = (t << 6) | c; // 将其依次放入一个int型中占3字节
if (++y == 4) {
outdata[i++] = (unsigned char)((t >> 16) & 0xff);
if (g > 1) outdata[i++] = (unsigned char)((t >> 8) & 0xff);
if (g > 2) outdata[i++] = (unsigned char)(t & 0xff);
y = t = 0;
}
}
if (outlen != NULL) {
*outlen = i;
}
return ret;
}
#if __cplusplus
}
#endif

#endif /* base64_h */
　　main.c
#include "base64.h"

int main(int argc, const char * argv[])
{
char str1[] = "https://www.baidu.com";
char str3[30] = { 0 };
char str2[30] = { 0 };
int len = 0;

base64_encode(str1, (int)strlen(str1), str2, &len);
printf("加密后: %s 长度: %d\n", str2, len);

base64_decode(str2, (int)strlen(str2), str3, &len);
printf("解密后: %s 长度: %d\n", str3, len);

system("pause");
return 0;
}
Base64加密2
#include <string.h>

#define OK 0
#define ERR -1
#define DECODE_SRC_LEN  4
#define DECODE_RET_LEN  3
#define BASE_SRC_LEN  3
#define BASE_DST_LEN  4

/*
A~Z,a~z,0~9,+/
*/
char Base64ToAsc(char c)
{
if (c >= 'A' && c <= 'Z')
{
return c - 'A';
}
else if (c >= 'a' && c <= 'z')
{
return 26 + c - 'a';
}
else if (c >= '0' && c <= '9')
{
return 52 + c - '0';
}
else if (c == '+')
{
return 62;
}
else if (c == '/')
{
return 63;
}
else
{
return c;
}

}

//szSrc[] 长度必然能被 4 整除
int DecodeBase64(char szRet[], char szSrc[], int iLen)
{
int  iLoop = iLen / DECODE_SRC_LEN;
int  iSrcOffset;
int  iRetOffset;
int  i;
int  j;
char szTmp[DECODE_SRC_LEN] = { 0 };


for (i = 0; i < iLoop; i++)
{
iSrcOffset = i * DECODE_SRC_LEN;
iRetOffset = i * DECODE_RET_LEN;

for (j = 0; j < DECODE_SRC_LEN; j++)
{
szTmp[j] = Base64ToAsc(szSrc[iSrcOffset + j]);
}

szRet[iRetOffset] = (szTmp[0] << 2) | (szTmp[1] >> 4);

if (szTmp[2] == '=')
{
szRet[iRetOffset + 1] = 0;
break;
}
szRet[iRetOffset + 1] = (szTmp[1] << 4) | (szTmp[2] >> 2);

if (szTmp[3] == '=')
{
szRet[iRetOffset + 2] = 0;
break;
}
szRet[iRetOffset + 2] = (szTmp[2] << 6) | (szTmp[3]);
}
return OK;
}

typedef struct Base64Cov
{
unsigned int sect1 : 6;
unsigned int sect2 : 6;
unsigned int sect3 : 6;
unsigned int sect4 : 6;
}BASE64COV_S;

/*
30~25  映射到 A~Z ,
26~51 映射到 a~z ,
52~61映射到 0~9,
62映射到+，
63 映射到
*/
char g_acBaseMap[] = "ABCD...Za...z0..9+/";

char ConvertToBase64(char c)
{
if (c < 26)
{
return 'A' + c;
}
else if (c < 52)
{
return 'a' + (c - 26);
}
else if (c < 62)
{
return '0' + (c - 52);
}
else if (c == 62)
{
return '+';
}
else
{
return '/';
}
}

//把 szSrc 每3个字符编码成 4个字符
int  EncodeBase64(char szRet[], char szSrc[], int iSrcLen)
{
BASE64COV_S  *pBase;
char szTmp[BASE_SRC_LEN] = { 'a', 'b', 'c' };
int iLoop = iSrcLen / BASE_SRC_LEN;
int iSrcOffSet;
int iRetOffSet;
int i;


for (i = 0; i < iLoop; i++)
{
//3个字符逆序放入szTmp
iSrcOffSet = i*BASE_SRC_LEN;
iRetOffSet = i*BASE_DST_LEN;

szTmp[0] = *(szSrc + iSrcOffSet + 2);
szTmp[1] = *(szSrc + iSrcOffSet + 1);
szTmp[2] = *(szSrc + iSrcOffSet);

pBase = (BASE64COV_S  *)szTmp;
szRet[i*BASE_DST_LEN] = ConvertToBase64(pBase->sect4);
szRet[i*BASE_DST_LEN + 1] = ConvertToBase64(pBase->sect3);
szRet[i*BASE_DST_LEN + 2] = ConvertToBase64(pBase->sect2);
szRet[i*BASE_DST_LEN + 3] = ConvertToBase64(pBase->sect1);
}

if (iSrcLen % BASE_SRC_LEN == 1)
{
iSrcOffSet += BASE_SRC_LEN;
iRetOffSet += BASE_DST_LEN;

szTmp[0] = 0;
szTmp[1] = 0;
szTmp[2] = *(szSrc + iSrcOffSet);

pBase = (BASE64COV_S  *)szTmp;
szRet[i*BASE_DST_LEN] = ConvertToBase64(pBase->sect4);
szRet[i*BASE_DST_LEN + 1] = ConvertToBase64(pBase->sect3);
szRet[i*BASE_DST_LEN + 2] = '=';
szRet[i*BASE_DST_LEN + 3] = '=';
}
else if (iSrcLen % BASE_SRC_LEN == 2)
{
iSrcOffSet += BASE_SRC_LEN;
iRetOffSet += BASE_DST_LEN;

szTmp[0] = 0;
szTmp[1] = *(szSrc + iSrcOffSet + 1);
szTmp[2] = *(szSrc + iSrcOffSet);

pBase = (BASE64COV_S  *)szTmp;
szRet[i*BASE_DST_LEN] = ConvertToBase64(pBase->sect4);
szRet[i*BASE_DST_LEN + 1] = ConvertToBase64(pBase->sect3);
szRet[i*BASE_DST_LEN + 2] = ConvertToBase64(pBase->sect2);
szRet[i*BASE_DST_LEN + 3] = '=';
}

return OK;
}

#define TEST_LEN 100
int _tmain(int argc, _TCHAR* argv[])
{
char szSrc[] = "abcde";
char szMid[TEST_LEN] = { 0 };
char szRet[TEST_LEN] = { 0 };

printf("SRC :%s\n", szSrc);
EncodeBase64(szMid, szSrc, strlen(szSrc));
printf("Encode:%s\n", szMid);
DecodeBase64(szRet, szMid, strlen(szMid));
printf("Decode:%s\n", szRet);

getchar();
return 0;
}
AES 加解密
#include <stdio.h>
#include <Windows.h>

// AES加密
BOOL AesEncrypt(BYTE *pPassword, BYTE *pData, DWORD &dwDataLength, DWORD dwBufferLength)
{
BOOL bRet = TRUE;
HCRYPTPROV hCryptProv = NULL;
HCRYPTHASH hCryptHash = NULL;
HCRYPTKEY hCryptKey = NULL;
DWORD dwPasswordLength = lstrlen((char *)pPassword);

do
{
// 获取CSP句柄
bRet = ::CryptAcquireContext(&hCryptProv, NULL, NULL, PROV_RSA_AES, CRYPT_VERIFYCONTEXT);
// 创建HASH对象
bRet = ::CryptCreateHash(hCryptProv, CALG_MD5, NULL, 0, &hCryptHash);
// 对密钥进行HASH计算
bRet = ::CryptHashData(hCryptHash, pPassword, dwPasswordLength, 0);
// 使用HASH来生成密钥
bRet = ::CryptDeriveKey(hCryptProv, CALG_AES_128, hCryptHash, CRYPT_EXPORTABLE, &hCryptKey);
// 加密数据
bRet = ::CryptEncrypt(hCryptKey, NULL, TRUE, 0, pData, &dwDataLength, dwBufferLength);
} while (FALSE);

// 关闭释放
if (hCryptKey || hCryptHash || hCryptProv)
{
::CryptDestroyKey(hCryptKey);
::CryptDestroyHash(hCryptHash);
::CryptReleaseContext(hCryptProv, 0);
}
return bRet;
}

// AES解密
BOOL AesDecrypt(BYTE *pPassword, BYTE *pData, DWORD &dwDataLength, DWORD dwBufferLength)
{
BOOL bRet = TRUE;
HCRYPTPROV hCryptProv = NULL;
HCRYPTHASH hCryptHash = NULL;
HCRYPTKEY hCryptKey = NULL;
DWORD dwPasswordLength = lstrlen((char *)pPassword);

do
{
// 获取CSP句柄
bRet = ::CryptAcquireContext(&hCryptProv, NULL, NULL, PROV_RSA_AES, CRYPT_VERIFYCONTEXT);
// 创建HASH对象
bRet = ::CryptCreateHash(hCryptProv, CALG_MD5, NULL, 0, &hCryptHash);
// 对密钥进行HASH计算
bRet = ::CryptHashData(hCryptHash, pPassword, dwPasswordLength, 0);
// 使用HASH来生成密钥
bRet = ::CryptDeriveKey(hCryptProv, CALG_AES_128, hCryptHash, CRYPT_EXPORTABLE, &hCryptKey);
// 解密数据
bRet = ::CryptDecrypt(hCryptKey, NULL, TRUE, 0, pData, &dwDataLength);
} while (FALSE);
// 关闭释放
if (hCryptKey || hCryptHash || hCryptProv)
{
::CryptDestroyKey(hCryptKey);
::CryptDestroyHash(hCryptHash);
::CryptReleaseContext(hCryptProv, 0);
}
return bRet;
}

int main(int argc, char *argv[])
{
BYTE pData[MAX_PATH] = { 0 };
DWORD dwDataLength = 0;
char *Msg = "hello lyshark !";

::lstrcpy((char *)pData, Msg);
dwDataLength = 1 + ::lstrlen((char *)pData);

// AES 加密
AesEncrypt((BYTE *)"123321", pData, dwDataLength, MAX_PATH);
printf("AES 加密长度: %d 加密后: %s \n", dwDataLength,pData);

// AES 解密
AesDecrypt((BYTE *)"123321", pData, dwDataLength, MAX_PATH);
printf("AES 解密长度: %d 解密后: %s \n", dwDataLength, pData);

system("pause");
return 0;
}
md5/SHA256/SHA512
#include <Windows.h>

BOOL GetFileData(char *pszFilePath, BYTE **ppFileData, DWORD *pdwFileDataLength)
{
BOOL bRet = TRUE;
BYTE *pFileData = NULL;
DWORD dwFileDataLength = 0;
HANDLE hFile = NULL;
DWORD dwTemp = 0;

do
{
hFile = ::CreateFile(pszFilePath, GENERIC_READ | GENERIC_WRITE,
FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING,
FILE_ATTRIBUTE_ARCHIVE, NULL);
if (INVALID_HANDLE_VALUE == hFile)
{
bRet = FALSE;
break;
}
dwFileDataLength = ::GetFileSize(hFile, NULL);
pFileData = new BYTE[dwFileDataLength];
if (NULL == pFileData)
{
bRet = FALSE;
break;
}
::RtlZeroMemory(pFileData, dwFileDataLength);

::ReadFile(hFile, pFileData, dwFileDataLength, &dwTemp, NULL);

*ppFileData = pFileData;
*pdwFileDataLength = dwFileDataLength;
} while (FALSE);

if (hFile)
{
::CloseHandle(hFile);
}
return bRet;
}

BOOL CalculateHash(BYTE *pData, DWORD dwDataLength, ALG_ID algHashType, BYTE **ppHashData, DWORD *pdwHashDataLength)
{
HCRYPTPROV hCryptProv = NULL;
HCRYPTHASH hCryptHash = NULL;
BYTE *pHashData = NULL;
DWORD dwHashDataLength = 0;
DWORD dwTemp = 0;
BOOL bRet = FALSE;
do
{
// 获得指定CSP的密钥容器的句柄
bRet = ::CryptAcquireContext(&hCryptProv, NULL, NULL, PROV_RSA_AES, CRYPT_VERIFYCONTEXT);
// 创建一个HASH对象, 指定HASH算法
bRet = ::CryptCreateHash(hCryptProv, algHashType, NULL, NULL, &hCryptHash);
// 计算HASH数据
bRet = ::CryptHashData(hCryptHash, pData, dwDataLength, 0);
// 获取HASH结果的大小
dwTemp = sizeof(dwHashDataLength);
bRet = ::CryptGetHashParam(hCryptHash, HP_HASHSIZE, (BYTE *)(&dwHashDataLength), &dwTemp, 0);
// 申请内存
pHashData = new BYTE[dwHashDataLength];
::RtlZeroMemory(pHashData, dwHashDataLength);
// 获取HASH结果数据
bRet = ::CryptGetHashParam(hCryptHash, HP_HASHVAL, pHashData, &dwHashDataLength, 0);
// 返回数据
*ppHashData = pHashData;
*pdwHashDataLength = dwHashDataLength;
} while (FALSE);

// 释放关闭
if (FALSE == bRet)
{
if (pHashData)
{
delete[]pHashData;
pHashData = NULL;
}
}
if (hCryptHash || hCryptProv)
{
::CryptDestroyHash(hCryptHash);
::CryptReleaseContext(hCryptProv, 0);
}
return bRet;
}


int main(int argc, char* argv[])
{
BYTE *pData = NULL;
DWORD dwDataLength = 0;
BYTE *pHashData = NULL;
DWORD dwHashDataLength = 0;

// 读取文件数据
GetFileData("C:\\nc.exe", &pData, &dwDataLength);

// MD5
CalculateHash(pData, dwDataLength, CALG_MD5, &pHashData, &dwHashDataLength);

for (DWORD x = 0; x < dwHashDataLength; x++)
printf("%x", pHashData[x]);
printf("\n");

// SHA256
CalculateHash(pData, dwDataLength, CALG_SHA_256, &pHashData, &dwHashDataLength);
for (DWORD x = 0; x < dwHashDataLength; x++)
printf("%x", pHashData[x]);

delete[]pHashData;
pHashData = NULL;

system("pause");
return 0;
}
RSA
// 生成公钥和私钥
BOOL GenerateKey(BYTE **ppPublicKey, DWORD *pdwPublicKeyLength, BYTE **ppPrivateKey, DWORD *pdwPrivateKeyLength)
{
BOOL bRet = TRUE;
HCRYPTPROV hCryptProv = NULL;
HCRYPTKEY hCryptKey = NULL;
BYTE *pPublicKey = NULL;
DWORD dwPublicKeyLength = 0;
BYTE *pPrivateKey = NULL;
DWORD dwPrivateKeyLength = 0;

do
{
// 获取CSP句柄
bRet = ::CryptAcquireContext(&hCryptProv, NULL, NULL, PROV_RSA_FULL, 0);
// 生成公私密钥对
bRet = ::CryptGenKey(hCryptProv, AT_KEYEXCHANGE, CRYPT_EXPORTABLE, &hCryptKey);
// 获取公钥密钥的长度和内容
bRet = ::CryptExportKey(hCryptKey, NULL, PUBLICKEYBLOB, 0, NULL, &dwPublicKeyLength);

pPublicKey = new BYTE[dwPublicKeyLength];
::RtlZeroMemory(pPublicKey, dwPublicKeyLength);
bRet = ::CryptExportKey(hCryptKey, NULL, PUBLICKEYBLOB, 0, pPublicKey, &dwPublicKeyLength);

// 获取私钥密钥的长度和内容
bRet = ::CryptExportKey(hCryptKey, NULL, PRIVATEKEYBLOB, 0, NULL, &dwPrivateKeyLength);

pPrivateKey = new BYTE[dwPrivateKeyLength];
::RtlZeroMemory(pPrivateKey, dwPrivateKeyLength);
bRet = ::CryptExportKey(hCryptKey, NULL, PRIVATEKEYBLOB, 0, pPrivateKey, &dwPrivateKeyLength);

// 返回数据
*ppPublicKey = pPublicKey;
*pdwPublicKeyLength = dwPublicKeyLength;
*ppPrivateKey = pPrivateKey;
*pdwPrivateKeyLength = dwPrivateKeyLength;

} while (FALSE);

// 释放关闭
if (hCryptKey || hCryptProv)
{
::CryptDestroyKey(hCryptKey);
::CryptReleaseContext(hCryptProv, 0);
}
return bRet;
}

// 公钥加密数据
BOOL RsaEncrypt(BYTE *pPublicKey, DWORD dwPublicKeyLength, BYTE *pData, DWORD &dwDataLength, DWORD dwBufferLength)
{
BOOL bRet = TRUE;
HCRYPTPROV hCryptProv = NULL;
HCRYPTKEY hCryptKey = NULL;
do
{
// 获取CSP句柄
bRet = ::CryptAcquireContext(&hCryptProv, NULL, NULL, PROV_RSA_FULL, 0);
// 导入公钥
bRet = ::CryptImportKey(hCryptProv, pPublicKey, dwPublicKeyLength, NULL, 0, &hCryptKey);
// 加密数据
bRet = ::CryptEncrypt(hCryptKey, NULL, TRUE, 0, pData, &dwDataLength, dwBufferLength);
} while (FALSE);

// 释放并关闭
if (hCryptKey || hCryptProv)
{
::CryptDestroyKey(hCryptKey);
::CryptReleaseContext(hCryptProv, 0);
}
return bRet;
}

// 私钥解密数据
BOOL RsaDecrypt(BYTE *pPrivateKey, DWORD dwProvateKeyLength, BYTE *pData, DWORD &dwDataLength)
{
BOOL bRet = TRUE;
HCRYPTPROV hCryptProv = NULL;
HCRYPTKEY hCryptKey = NULL;
do
{
// 获取CSP句柄
bRet = ::CryptAcquireContext(&hCryptProv, NULL, NULL, PROV_RSA_FULL, 0);
// 导入私钥
bRet = ::CryptImportKey(hCryptProv, pPrivateKey, dwProvateKeyLength, NULL, 0, &hCryptKey);
// 解密数据
bRet = ::CryptDecrypt(hCryptKey, NULL, TRUE, 0, pData, &dwDataLength);
} while (FALSE);

// 释放并关闭
if (hCryptKey || hCryptProv)
{
::CryptDestroyKey(hCryptKey);
::CryptReleaseContext(hCryptProv, 0);
}
return bRet;
}



int _tmain(int argc, _TCHAR* argv[])
{
BYTE *pPublicKey = NULL;
DWORD dwPublicKeyLength = 0;
BYTE *pPrivateKey = NULL;
DWORD dwPrivateKeyLength = 0;
BYTE *pData = NULL;
DWORD dwDataLength = 0;
DWORD dwBufferLength = 4096;
DWORD i = 0;

pData = new BYTE[dwBufferLength];
if (NULL == pData)
{
return 1;
}
::RtlZeroMemory(pData, dwBufferLength);
::lstrcpy((char *)pData, "hello lyshark");
dwDataLength = 1 + ::lstrlen((char *)pData);

// 生成公钥和私钥
GenerateKey(&pPublicKey, &dwPublicKeyLength, &pPrivateKey, &dwPrivateKeyLength);
printf("Public Key[%d]\n", dwPublicKeyLength);
for (i = 0; i < dwPublicKeyLength; i++)
printf("%.2x", pPublicKey[i]);
printf("\n");

printf("Private Key[%d]\n", dwPrivateKeyLength);
for (i = 0; i < dwPrivateKeyLength; i++)
printf("%.2x", pPrivateKey[i]);
printf("\n\n");


// 公钥加密
RsaEncrypt(pPublicKey, dwPublicKeyLength, pData, dwDataLength, dwBufferLength);
printf("RSA Encrypt[%d]\n", dwDataLength);
for (i = 0; i < dwDataLength; i++)
printf("%x", pData[i]);
printf("\n\n");

// 私钥解密
RsaDecrypt(pPrivateKey, dwPrivateKeyLength, pData, dwDataLength);
printf("RSA Decrypt[%d] %s \n", dwDataLength,pData);
printf("\n\n");

// 释放
if (pData)
{
delete[]pData;
pData = NULL;
}
if (pPrivateKey)
{
delete[]pPrivateKey;
pPrivateKey = NULL;
}
if (pPublicKey)
{
delete[]pPublicKey;
pPublicKey = NULL;
}

system("pause");
return 0;
}

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