JAVA 使用DES加密字符串,windows系统和linux系统加密后不一样

2016-04-01 04:34:01 430 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

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以下同样的代码在windows系统和linux系统加密出来的字符串不一样，
请问是什么问题导致的？



import java.security.Key;  

import java.security.SecureRandom;  



import javax.crypto.Cipher;  

import javax.crypto.CipherInputStream;  

import javax.crypto.CipherOutputStream;  

import javax.crypto.KeyGenerator;  



import org.apache.commons.codec.binary.Base64;



public class DESUtil {  

    private Key key;  



    public DESUtil() {  



    }  



    public DESUtil(String str) {  

        setKey(str); // 生成密匙  

    }  



    public Key getKey() {  

        return key;  

    }  



    public void setKey(Key key) {  

        this.key = key;  

    }  



    /** 

    * 根据参数生成 KEY   

    */  

    public void setKey (String strKey) {  

    try {  

        KeyGenerator _generator = KeyGenerator.getInstance("DES");  

        //防止linux下 随机生成key   

        SecureRandom secureRandom = SecureRandom.getInstance("SHA1PRNG" );  

        secureRandom.setSeed(strKey.getBytes());  

          

        _generator.init(56,secureRandom);  

        this.key = _generator.generateKey();  

        _generator = null;  

    } catch (Exception e) {  

        throw new RuntimeException(  

            "生成key失败。 Cause: " + e);  

    }  

    }



    /** 

    * 加密 String 明文输入 ,String 密文输出 

    */  

    public String encryptStr(String strMing) {  

        byte[] byteMi = null;  

        byte[] byteMing = null;  

        String strMi = "";  

        Base64 base64 = new Base64();

        try {  

            byteMing = strMing.getBytes("UTF8");  

            byteMi = this.encryptByte(byteMing);  

            strMi = base64.encodeBase64String(byteMi);  

        } catch (Exception e) {  

            throw new RuntimeException(  

                "明文加密失败。 Cause: " + e);  

        } finally {  

            base64 = null;  

            byteMing = null;  

            byteMi = null;  

        }  

        return strMi;  

    }  



    /** 

    * 解密 以 String 密文输入 ,String 明文输出 

    * 

    * @param strMi 

    * @return 

    */  

    public String decryptStr(String strMi) {  

        Base64 base64 = new Base64();

        byte[] byteMing = null;  

        byte[] byteMi = null;  

        String strMing = "";  

        try {  

            byteMi = base64.decodeBase64(strMi);  

            byteMing = this.decryptByte(byteMi);  

            strMing = new String(byteMing, "UTF8");  

        } catch (Exception e) {  

            throw new RuntimeException(  

                "密文解密失败。 Cause: " + e);  

        } finally {  

            base64 = null;  

            byteMing = null;  

            byteMi = null;  

        }  

        return strMing;  

    }  



    /** 

    * 加密以 byte[] 明文输入 ,byte[] 密文输出 

    * 

    * @param byteS 

    * @return 

    */  

    private byte[] encryptByte(byte[] byteS) {  

        byte[] byteFina = null;  

        Cipher cipher;  

        try {  

            cipher = Cipher.getInstance("DES/ECB/PKCS5Padding");  

            cipher.init(Cipher.ENCRYPT_MODE, key);  

            byteFina = cipher.doFinal(byteS);  

        } catch (Exception e) {  

            throw new RuntimeException(  

                "字节加密失败。 Cause: " + e);  

        } finally {  

            cipher = null;  

        }  

        return byteFina;  

    }  



    /** 

    * 解密以 byte[] 密文输入 , 以 byte[] 明文输出 

    * 

    * @param byteD 

    * @return 

    */  

    private byte[] decryptByte(byte[] byteD) {  

        Cipher cipher;  

        byte[] byteFina = null;  

        try {  

            cipher = Cipher.getInstance("DES/ECB/PKCS5Padding");  

            cipher.init(Cipher.DECRYPT_MODE, key);  

            byteFina = cipher.doFinal(byteD);  

        } catch (Exception e) {  

            throw new RuntimeException(  

                "字节解密失败。 Cause: " + e);  

        } finally {  

            cipher = null;  

        }  

        return byteFina;  

    }  



    public static void main(String[] args) throws Exception {  

        DESUtil des = new DESUtil("12345678");  

        String str1 = "1234567890ABCDEF";  

        // DES 加密字符串  

        String str2 = des.encryptStr(str1);  

        // DES 解密字符串  

        String deStr = des.decryptStr(str2);  

        System.out.println(" 加密前： " + str1);  

        System.out.println(" 加密后： " + str2);  

        System.out.println(" 加密后长度： " + str2.length());  

        System.out.println(" 解密后： " + deStr);  

    }  

}