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[旧帖] c# 加密函数转C/c++ 0.00雪花

发表于: 2012-11-29 14:58 4031

[旧帖] c# 加密函数转C/c++ 0.00雪花

sunsjw

2012-11-29 14:58

4031

private static byte[] Encrypt(string key, string plianText)
{
    SymmetricAlgorithm Aesalg = SymmetricAlgorithm.Create("Rijndael");
    HashAlgorithm MD5alg = HashAlgorithm.Create("MD5");
    Aesalg.BlockSize = 128;
    Aesalg.Padding = PaddingMode.PKCS7;
    Aesalg.Mode = CipherMode.CFB;
    Aesalg.IV = new byte[] { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 };
    Aesalg.Key = MD5alg.ComputeHash(Encoding.ASCII.GetBytes(key));
    ICryptoTransform cryptor = Aesalg.CreateEncryptor();
    MemoryStream ms = new MemoryStream();
    CryptoStream cs = new CryptoStream(ms, cryptor, CryptoStreamMode.Write);
    byte[] inBuffer = Encoding.ASCII.GetBytes(plianText);
    cs.Write(inBuffer, 0, inBuffer.Length);
    cs.FlushFinalBlock();
    return ms.ToArray();
}

以上是一段c#加密代码，求c/c++下用CryptoAPI的实现。以下是我用c/c++的实现代码，但是加密的结果不一样，求熟悉的人给于指点。

#include "stdafx.h"
#include <STDLIB.H>
#include <Windows.h>
#include <WinCrypt.h>
 
#pragma comment(lib,"crypt32")
 
#define KEYLENGTH  0x00800000
#define ENCRYPT_BLOCK_SIZE 16
 
BYTE IV[16] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15};
 
#define MS_ENH_RSA_AES_PROV "Microsoft Enhanced RSA and AES Cryptographic Provider (Prototype)"
//加密数据
char* Entrypt(char* sql,char key[16])
{
    HCRYPTPROV hCryptProv;
    HCRYPTKEY hKey;
    HCRYPTHASH hHash;
     
    PBYTE pbBuffer;
    DWORD dwBlockLen;
    DWORD dwBufferLen;
    DWORD dwCount = 0;
    //以下获得一个CSP句柄
    CryptAcquireContext(
        &hCryptProv,
        NULL,               //NULL表示使用默认密钥容器，默认密钥容器名为用户登陆名
        MS_ENH_RSA_AES_PROV,
        PROV_RSA_AES,
        CRYPT_VERIFYCONTEXT);
    //--------------------------------------------------------------------
    // 创建一个会话密钥（session key）
    // 会话密钥也叫对称密钥，用于对称加密算法。
    // （注: 一个Session是指从调用函数CryptAcquireContext到调用函数
    //  CryptReleaseContext 期间的阶段。会话密钥只能存在于一个会话过程）
    if (CryptCreateHash(hCryptProv,CALG_MD5,0,0,&hHash))
    {
        // 用输入的密码产生一个散列
        if(CryptHashData(hHash,(BYTE*)key,10,0))
        {
            // 通过散列生成会话密钥
            CryptDeriveKey(hCryptProv,CALG_AES_128,hHash,KEYLENGTH,&hKey);
             
            //删除散列表
            CryptDestroyHash(hHash);
            hHash = NULL;
             
            BOOL b1 = CryptSetKeyParam(hKey,KP_IV,IV,0);
            DWORD dwMode = CRYPT_MODE_CFB;
            b1 = CryptSetKeyParam(hKey,KP_MODE,(const BYTE*)&dwMode,0);
            dwMode = PKCS5_PADDING;
            b1 = CryptSetKeyParam(hKey,KP_PADDING,(const BYTE*)&dwMode,0);
            // 因为加密算法是按ENCRYPT_BLOCK_SIZE 大小的块加密的，所以被加密的
            // 数据长度必须是ENCRYPT_BLOCK_SIZE 的整数倍。下面计算一次加密的
            // 数据长度。
            int sqllen = strlen(sql);
            dwBlockLen = sqllen - sqllen % ENCRYPT_BLOCK_SIZE;
            if((sqllen % ENCRYPT_BLOCK_SIZE) > 0)
                dwBufferLen = dwBlockLen + ENCRYPT_BLOCK_SIZE;
             
            pbBuffer = (BYTE *)malloc(dwBufferLen);
            ZeroMemory(pbBuffer,dwBufferLen);
            strcpy((char*)pbBuffer,sql);
            dwCount = sqllen;
            if(!CryptEncrypt(hKey,0,TRUE,0,pbBuffer,&dwCount,dwBufferLen))
            {
                free(pbBuffer);
                pbBuffer = (BYTE*)malloc(dwCount);
                ZeroMemory(pbBuffer,dwCount);
                strcpy((char*)pbBuffer,sql);
                dwCount = strlen(sql);
                CryptEncrypt(hKey,0,TRUE,0,pbBuffer,&dwCount,dwBufferLen);
            }
        }
    }
    CryptReleaseContext(hCryptProv,0);
    DWORD cchString = 0;
    CryptBinaryToString(pbBuffer,dwCount,CRYPT_STRING_BASE64,NULL,&cchString);
    char* pResult = (char*)malloc(cchString);
    CryptBinaryToString(pbBuffer,dwCount,CRYPT_STRING_BASE64,pResult,&cchString);
    free(pbBuffer);
    return pResult;
}
 
int main(int argc, char* argv[])
{
    char* plianText = "i love this game.";
    char* pEncryText = Entrypt(plianText,"1234567890");
 
    printf("%s",pEncryText);
    return 0;
}