C++ 文件hash值 BT种子的hash值

这个两个东东，是我在网上找到的。小小的修改了一下方便大家使用。

一个是 获取文件哈希值的，另外一个是获取torrent文件磁力链接的哈希值。

整理好的类下载地址：

文件hash值：

http://pan.baidu.com/share/link?shareid=3718436681&uk=3037189616

torrent Hash值:

http://pan.baidu.com/share/link?shareid=3728056606&uk=3037189616

 这个是QQ群 欢迎加入，一起学习编程。

// CHash.h : header file


#pragma once
#include "sha1.h"

#define        SIZE_OF_BUFFER         16000

class CHash
{
// Construction
public:
    CString SHA1Hash(CString strHashFile);
};

// CHash.cpp : implementation file
//
#include "stdafx.h"
#include "CHash.h"
#include <atlconv.h>

CString CHash::SHA1Hash(CString strHashFile)
{
    USES_CONVERSION;
    FILE *fileToHash = NULL;
    unsigned long lenRead = 0;
    unsigned char fileBuf[SIZE_OF_BUFFER];
    sha1_ctx m_sha1;
    unsigned char* tempOut = new unsigned char[256];
    CString    tempHash;
    CString outHash;

    sha1_begin(&m_sha1);

    fileToHash = fopen(T2A(strHashFile), "rb");
    do
    {
        lenRead = fread(fileBuf, 1, SIZE_OF_BUFFER, fileToHash);
        if(lenRead != 0)
        {
            sha1_hash(fileBuf, lenRead, &m_sha1);
        }
    } while (lenRead == SIZE_OF_BUFFER);
    
    fclose(fileToHash); fileToHash = NULL;

    sha1_end(tempOut, &m_sha1);

    for (int i = 0 ; i < 20 ; i++)
    {
        char tmp[3];
        _itoa(tempOut[i], tmp, 16);
        if (strlen(tmp) == 1)
        {
            tmp[1] = tmp[0];
            tmp[0] = '0';
            tmp[2] = '';
        }
        tempHash += tmp;    

    }

    delete[] tempOut;

    outHash = tempHash;

    return outHash;
}