Java摘要算法

package com.neohope.utils;

import java.io.IOException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

import javax.crypto.Mac;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;

public class NDigest
{
	/**
	 * Bytes to Hex String
	 * 
	 * @param hexBytes
	 * 
	 * @return hex string
	 */
	private static String bytesToHexString(byte[] hexBytes)
	{
		StringBuffer buf = new StringBuffer();

		for (int i = 0; i < hexBytes.length; i++)
		{
			if ((hexBytes[i] & 0xff) < 0x10)
			{
				buf.append("0");
			}

			buf.append(Long.toString(hexBytes[i] & 0xff, 16));
		}

		return buf.toString();
	}

	/**
	 * calc MD5 for string
	 * 
	 * @param textIn
	 * 
	 * @return md5 digest string
	 * @throws NoSuchAlgorithmException
	 */
	public static String MD5Digest(String textIn)
			throws NoSuchAlgorithmException
	{
		byte[] textData = textIn.getBytes();

		MessageDigest md = null;
		md = MessageDigest.getInstance("MD5");
		md.reset();
		md.update(textData);

		byte[] encodedData = md.digest();
		return bytesToHexString(encodedData);
	}

	/**
	 * calc SHA1 for string
	 * 
	 * @param textIn
	 * 
	 * @return sha1 digest string
	 * @throws NoSuchAlgorithmException
	 */
	public static String SHA1Digest(String textIn)
			throws NoSuchAlgorithmException
	{
		byte[] textData = textIn.getBytes();

		MessageDigest md = null;
		md = MessageDigest.getInstance("SHA1");
		md.reset();
		md.update(textData);

		byte[] encodedData = md.digest();
		return bytesToHexString(encodedData);
	}

	/**
	 * Encode a string using Base64 encoding.
	 * 
	 * @param textIn
	 * @return String
	 */
	public static String base64Encode(String textIn)
	{
		sun.misc.BASE64Encoder encoder = new sun.misc.BASE64Encoder();
		return encoder.encodeBuffer(textIn.getBytes()).trim();
	}

	/**
	 * Decode a string using Base64 encoding.
	 * 
	 * @param textIn
	 * @return String
	 * @throws IOException
	 */
	public static String decodeString(String textIn) throws IOException
	{
		sun.misc.BASE64Decoder dec = new sun.misc.BASE64Decoder();
		return new String(dec.decodeBuffer(textIn));
	}

	/**
	 * 使用 HMAC-SHA-1 签名方法对对textIn进行摘要
	 * 
	 * @param textIn
	 * @param keyIn
	 * @return
	 * @throws Exception
	 */
	public static String HmacSHA1Digest(String textIn, String keyIn)
			throws Exception
	{
		final String MAC_NAME = "HmacSHA1";
		final String ENCODING = "UTF-8";

		byte[] keyData = keyIn.getBytes(ENCODING);
		SecretKey secretKey = new SecretKeySpec(keyData, MAC_NAME);
		Mac mac = Mac.getInstance(MAC_NAME);
		mac.init(secretKey);

		byte[] textData = textIn.getBytes(ENCODING);
		byte[] encodedData = mac.doFinal(textData);

		return bytesToHexString(encodedData);
	}

	// 我就是那个测试函数。。。
	public static void main(String args[]) throws Exception
	{
		String key = "Y9zTQxRvxwrHOi45OoKNnIoxboerNqt3";
		String text = "Good good study, day day up.";
		String hmacSHA1 = HmacSHA1Digest(text, key );
		String base64 = base64Encode(hmacSHA1);
		System.out.println(hmacSHA1 );
		System.out.println(cbase64);
	}
}

VC计算CString摘要

1、VC计算字符串MD5摘要

//输入:要计算摘要的字符串
//输出:128位MD5摘要
#include <wincrypt.h>
CString szResult;

CString CDigestDlg::CalcMD5(CString strContent)
{
  DWORD dwLength=0;
  BYTE* pbContent=NULL;

  dwLength = (DWORD)strContent.GetLength();
  pbContent = new BYTE[dwLength];
  memcpy(pbContent,strContent.GetBuffer(dwLength),dwLength);

  //计算MD5编码
  HCRYPTPROV hCryptProv; 
  HCRYPTHASH hHash; 
  BYTE byteMD5[16]; 
  DWORD dwHashLen=16;
  CString szResult;

  if(CryptAcquireContext(&hCryptProv, NULL, NULL, PROV_RSA_FULL, CRYPT_VERIFYCONTEXT | CRYPT_MACHINE_KEYSET)) 
  {
    if(CryptCreateHash(hCryptProv, CALG_MD5, 0, 0, &hHash)) 
    {
      if(CryptHashData(hHash, pbContent, dwLength, 0))
      {

        if(CryptGetHashParam(hHash, HP_HASHVAL, byteMD5, &dwHashLen, 0)) 
        {
          szResult.Format(TEXT("%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x"),
            byteMD5[0],byteMD5[1],byteMD5[2],byteMD5[3],byteMD5[4],byteMD5[5],byteMD5[6],byteMD5[7]
            ,byteMD5[8],byteMD5[9],byteMD5[10],byteMD5[11],byteMD5[12],byteMD5[13],byteMD5[14],byteMD5[15]);
        }
        else
        {
          szResult=TEXT("Error getting hash param");
        }

      }
      else
      {
        szResult=TEXT("Error hashing data");
      }
    }
    else
    {
      szResult=TEXT("Error creating hash");
    }
  }
  else
  {
    szResult=TEXT("Error acquiring context");
  }

  CryptDestroyHash(hHash); 
  CryptReleaseContext(hCryptProv, 0); 
  delete[] pbContent;
  pbContent=NULL;

  return szResult;
}

2、VC计算字符串SHA1摘要

//输入:要计算摘要的字符串
//输出:160位SHA1摘要
#include <wincrypt.h>
CString szResult;

CString CDigestDlg::CalcSHA1(CString strContent)
{
  DWORD dwLength=0;
  BYTE* pbContent=NULL;

  dwLength = (DWORD)strContent.GetLength();
  pbContent = new BYTE[dwLength];
  memcpy(pbContent,strContent.GetBuffer(dwLength),dwLength);

  //计算MD5编码
  HCRYPTPROV hCryptProv; 
  HCRYPTHASH hHash; 
  BYTE byteSHA1[20]; 
  DWORD dwHashLen=20;
  CString szResult;

  if(CryptAcquireContext(&hCryptProv, NULL, NULL, PROV_RSA_FULL, CRYPT_VERIFYCONTEXT | CRYPT_MACHINE_KEYSET)) 
  {
    if(CryptCreateHash(hCryptProv, CALG_SHA1, 0, 0, &hHash)) 
    {
      if(CryptHashData(hHash, pbContent, dwLength, 0))
      {

        if(CryptGetHashParam(hHash, HP_HASHVAL, byteSHA1, &dwHashLen, 0)) 
        {
          szResult.Format(TEXT("%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x"),
            byteSHA1[0],byteSHA1[1],byteSHA1[2],byteSHA1[3],byteSHA1[4],byteSHA1[5],byteSHA1[6],byteSHA1[7],
            byteSHA1[8],byteSHA1[9],byteSHA1[10],byteSHA1[11],byteSHA1[12],byteSHA1[13],byteSHA1[14],byteSHA1[15],
            byteSHA1[16],byteSHA1[17],byteSHA1[18],byteSHA1[19]);
        }
        else
        {
          szResult=TEXT("Error getting hash param");
        }

      }
      else
      {
        szResult=TEXT("Error hashing data");
      }
    }
    else
    {
      szResult=TEXT("Error creating hash");
    }
  }
  else
  {
    szResult=TEXT("Error acquiring context");
  }

  CryptDestroyHash(hHash); 
  CryptReleaseContext(hCryptProv, 0); 
  delete[] pbContent;
  pbContent=NULL;

  return szResult;
}

VC计算文件摘要

1、VC计算文件MD5摘要

//输入:文件路径
//输出:128位MD5摘要
#include <wincrypt.h>
CString szResult;

CString CMD5AndSHA1Dlg::CalcMD5(CString strFilePath)
{
  //读取文件
  CFile inFile;
  CFileException ex;
  DWORD dwLength=0;
  BYTE* pbContent=NULL;
  BOOL bRet;

  bRet=inFile.Open(strFilePath,CFile::modeRead | CFile::typeBinary | CFile::shareDenyWrite,&ex);
  if(bRet==FALSE)
  {
    return TEXT("Error opening file");;
  }

  dwLength = (DWORD)inFile.GetLength();
  pbContent = new BYTE[dwLength];
  if(pbContent==NULL)
  {
    return TEXT("Error not enough memory");;
  }
  inFile.Read(pbContent,dwLength);
  inFile.Close();

  //计算MD5编码
  HCRYPTPROV hCryptProv; 
  HCRYPTHASH hHash; 
  BYTE byteMD5[16]; 
  DWORD dwHashLen=16;
  CString szResult;

  if(CryptAcquireContext(&hCryptProv, NULL, NULL, PROV_RSA_FULL, CRYPT_VERIFYCONTEXT | CRYPT_MACHINE_KEYSET)) 
  {
    if(CryptCreateHash(hCryptProv, CALG_MD5, 0, 0, &hHash)) 
    {
      if(CryptHashData(hHash, pbContent, dwLength, 0))
      {

        if(CryptGetHashParam(hHash, HP_HASHVAL, byteMD5, &dwHashLen, 0)) 
        {
          szResult.Format(TEXT("%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x"),
            byteMD5[0],byteMD5[1],byteMD5[2],byteMD5[3],byteMD5[4],byteMD5[5],byteMD5[6],byteMD5[7]
            ,byteMD5[8],byteMD5[9],byteMD5[10],byteMD5[11],byteMD5[12],byteMD5[13],byteMD5[14],byteMD5[15]);
        }
        else
        {
          szResult=TEXT("Error getting hash param");
        }

      }
      else
      {
        szResult=TEXT("Error hashing data");
      }
    }
    else
    {
      szResult=TEXT("Error creating hash");
    }
  }
  else
  {
    szResult=TEXT("Error acquiring context");
  }

  CryptDestroyHash(hHash); 
  CryptReleaseContext(hCryptProv, 0); 
  delete[] pbContent;
  pbContent=NULL;

  return szResult;
}

2、VC计算文件SHA1摘要

//输入:文件路径(文件必须小于2^64bit)
//输出:160位SHA1摘要
#include <wincrypt.h>
CString szResult;

CString CMD5AndSHA1Dlg::CalcSHA1(CString strFilePath)
{
  //读取文件
  CFile inFile;
  CFileException ex;
  DWORD dwLength=0;
  BYTE* pbContent=NULL;
  BOOL bRet;

  bRet=inFile.Open(strFilePath,CFile::modeRead | CFile::typeBinary | CFile::shareDenyWrite,&ex);
  if(bRet==FALSE)
  {
    return TEXT("Error opening file");;
  }

  dwLength = (DWORD)inFile.GetLength();
  pbContent = new BYTE[dwLength];
  if(pbContent==NULL)
  {
    return TEXT("Error not enough memory");;
  }
  inFile.Read(pbContent,dwLength);
  inFile.Close();

  //计算MD5编码
  HCRYPTPROV hCryptProv; 
  HCRYPTHASH hHash; 
  BYTE byteSHA1[20]; 
  DWORD dwHashLen=20;
  CString szResult;

  if(CryptAcquireContext(&hCryptProv, NULL, NULL, PROV_RSA_FULL, CRYPT_VERIFYCONTEXT | CRYPT_MACHINE_KEYSET)) 
  {
    if(CryptCreateHash(hCryptProv, CALG_SHA1, 0, 0, &hHash)) 
    {
      if(CryptHashData(hHash, pbContent, dwLength, 0))
      {

        if(CryptGetHashParam(hHash, HP_HASHVAL, byteSHA1, &dwHashLen, 0)) 
        {
          szResult.Format(TEXT("%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x"),
            byteSHA1[0],byteSHA1[1],byteSHA1[2],byteSHA1[3],byteSHA1[4],byteSHA1[5],byteSHA1[6],byteSHA1[7],
            byteSHA1[8],byteSHA1[9],byteSHA1[10],byteSHA1[11],byteSHA1[12],byteSHA1[13],byteSHA1[14],byteSHA1[15],
            byteSHA1[16],byteSHA1[17],byteSHA1[18],byteSHA1[19]);
        }
        else
        {
          szResult=TEXT("Error getting hash param");
        }

      }
      else
      {
        szResult=TEXT("Error hashing data");
      }
    }
    else
    {
      szResult=TEXT("Error creating hash");
    }
  }
  else
  {
    szResult=TEXT("Error acquiring context");
  }

  CryptDestroyHash(hHash); 
  CryptReleaseContext(hCryptProv, 0); 
  delete[] pbContent;
  pbContent=NULL;

  return szResult;
}