C++ SHA1::CalculateDigest方法代码示例

std::string transformToSHA1(std::string plainText, bool upperCase)
{
	// Crypto++ SHA1 object
	CryptoPP::SHA1 hash;

	// Use native byte instead of casting chars
	byte digest[CryptoPP::SHA1::DIGESTSIZE];

	// Do the actual calculation, require a byte value so we need a cast
	hash.CalculateDigest(digest, (const byte*)plainText.c_str(), plainText.length());

	// Crypto++ HexEncoder object
	CryptoPP::HexEncoder encoder;

	// Our output
	std::string output;

	// Drop internal hex encoder and use this, returns uppercase by default
	encoder.Attach(new CryptoPP::StringSink(output));
	encoder.Put(digest, sizeof(digest));
	encoder.MessageEnd();

	// Make sure we want uppercase
	if(upperCase)
		return output;

	// Convert to lowercase if needed
	return asLowerCaseString(output);
}

//***************************************************************
byte * HashClass::getSHA1(const byte * input, int length)
{
    CryptoPP::SHA1 sha;
    byte *digest = new byte [CryptoPP::SHA1::DIGESTSIZE];
    sha.CalculateDigest(digest, input, length);
    return digest;
}

/*Calculate SHA1 hash*/
string HashCalculate(string input_string)
{
	CryptoPP::SHA1 hash;
	byte digest[CryptoPP::SHA1::DIGESTSIZE];
	string output;

	//calculate hash
	hash.CalculateDigest(digest, (const byte *)input_string.c_str(),
                         input_string.size());

	//encode in Hex
	CryptoPP::HexEncoder encoder;
	CryptoPP::StringSink *SS = new CryptoPP::StringSink(output);
	encoder.Attach(SS);
	encoder.Put(digest, sizeof(digest));
	encoder.MessageEnd();

	//prepend 0x
	output = "0x" + output;
	return output;
}

void CPropChkSum::OnOK() 
{
	UpdateData();

	CPropertyPage::OnOK();
	if(m_szFileName == _T("")) {
		AfxMessageBox(_T("Please select the file."));
		return ;
	}

	HANDLE hFile = CreateFile(m_szFileName, GENERIC_WRITE | GENERIC_READ, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL,NULL);
	if (hFile == INVALID_HANDLE_VALUE){
		CString str = m_szFileName + _T(" doesn't exist!");
		AfxMessageBox(str);
		return ;
	}

	DWORD dwFileSize = GetFileSize(hFile, NULL);
	HANDLE hFileMap = CreateFileMapping(
						hFile, // 如果这值为INVALID_HANDLE_VALUE,是合法的，上步一定测试啊
						NULL,    // 默认安全性
						PAGE_READWRITE,    // 可读
						0, // 2个32位数示1个64位数，最大文件字节数，
						 // 高字节，文件大小小于4G时，高字节永远为0
						0,//dwFileSize, // 此为低字节，也就是最主要的参数，如果为0，取文件真实大小
						NULL);
	if (hFileMap == NULL)
	{
		CString str = _T("Mapping ") + m_szFileName + _T(" failed!");
		AfxMessageBox(str);
		CloseHandle(hFile);
		return ;
	}

	PVOID pvFile = MapViewOfFile( //pvFile就是得到的指针，用它来直接操作文件
						hFileMap, 
						FILE_MAP_WRITE,     // 可读
						0,      // 文件指针头位置 高字节
						0, // 文件指针头位置 低字节 必为分配粒度的整倍数,windows的粒度为64K
						0);    // 要映射的文件尾，如果为0，则从指针头到真实文件尾
	if (pvFile == NULL)	{
		CString str = _T("MapViewOfFile ") + m_szFileName + _T(" failed, ERROR:!");
		str.Format(_T("MapViewOfFile %s failed, ERROR:%d!"), m_szFileName, GetLastError());
		AfxMessageBox(str);
		CloseHandle(hFileMap);
		CloseHandle(hFile);
		return ;
	}
	// 步骤4: 像操作内存一样操作文件,演示功能把整个文件倒序
	char *pData = (char*)pvFile;

	boost::crc_16_type crc16t;
	crc16t.process_bytes(pData, dwFileSize);
	unsigned short crc16 = crc16t.checksum();
	m_strCRC16.Format(_T("%04X"), crc16);

	boost::crc_ccitt_type crc_ccitt;
	crc_ccitt.process_bytes(pData, dwFileSize);
	crc16 = crc_ccitt.checksum();
	m_strCRC_CCITT.Format(_T("%04X"), crc16);

	boost::crc_xmodem_type  crc_xmdm;
	crc_xmdm.process_bytes(pData, dwFileSize);
	crc16 = crc_xmdm.checksum();
	m_strCRC32C.Format(_T("%04X"), crc16);

	boost::crc_32_type crc32t;
	crc32t.process_bytes(pData, dwFileSize);
	unsigned long crc32 = crc32t.checksum();
	m_strCRC32.Format(_T("%04X"), crc32);

	enum {
		MessageDigest_MD5 = 0,
		MessageDigest_SHA,
		MessageDigest_SHA1,
		MessageDigest_SHA224,
		MessageDigest_SHA256,
		MessageDigest_SHA384,
		MessageDigest_SHA3_224,
		MessageDigest_SHA3_256,
		MessageDigest_SHA3_384,
		MessageDigest_SHA3_512
	};
	
	CString strMessageDigest;
	unsigned char sha_md[120] = {0};
	int index = 0;

	if(m_mdList.GetCheck(MessageDigest_MD5)) {
		CryptoPP::Weak1::MD5 md5;
		md5.CalculateDigest((byte*)&sha_md, (unsigned char *)pData, dwFileSize);
		strMessageDigest.Format( 
			"MD5: %02X%02X%02X%02X%02X%02X%02X%02X"
			"%02X%02X%02X%02X%02X%02X%02X%02X",
			sha_md[0], sha_md[1], sha_md[2], sha_md[3],sha_md[4], sha_md[5], sha_md[6], sha_md[7], 
			sha_md[8], sha_md[9], sha_md[10], sha_md[11],sha_md[12], sha_md[13], sha_md[14], sha_md[15]
		);
		
		m_mdList.SetItemText(MessageDigest_MD5, 0, strMessageDigest);
	}
//.........这里部分代码省略.........