LED投屏功能优化

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2023-04-21 195945efc5db921a4c9eb8cf9421c172273293f5

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package com.mandi.common;
 
import java.io.UnsupportedEncodingException;
import java.security.InvalidAlgorithmParameterException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
 
import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.KeyGenerator;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.SecretKey;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
 
import org.apache.commons.codec.binary.Base64;
 
public class AESMethod {
    public static String encryptPKCS7ForBase64(String pwd,String source,byte[] IV){
        if(source==null||pwd==null)
            return null;
        try {
            KeyGenerator keygen=KeyGenerator.getInstance("AES");
            SecureRandom sr=SecureRandom.getInstance("SHA1PRNG");
            sr.setSeed(pwd.getBytes());
            keygen.init(128,sr);
            SecretKey key=keygen.generateKey();
            byte[] keyendoce=key.getEncoded();
            SecretKeySpec keyspec=new SecretKeySpec(keyendoce, "AES");
            Cipher cipher=Cipher.getInstance("AES/CBC/PKCS5Padding");
            try {
                cipher.init(Cipher.ENCRYPT_MODE,keyspec,new IvParameterSpec(IV));
                byte[] sbytes=null;
                sbytes = cipher.doFinal(source.getBytes("utf8"));
                return Base64.encodeBase64String(sbytes) ;//byte2hexStr(sbytes);  //这里也可以用base64来表示,这样解密的时候反解析base64
            } catch (UnsupportedEncodingException e) {
                System.out.println("加密过程中，getbyte有错误!");
                e.printStackTrace();
            } catch (InvalidAlgorithmParameterException e) {
                e.printStackTrace();
            }
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        } catch (NoSuchPaddingException e) {
            e.printStackTrace();
        } catch (InvalidKeyException e) {
            e.printStackTrace();
        } catch (IllegalBlockSizeException e) {
            e.printStackTrace();
        } catch (BadPaddingException e) {
            e.printStackTrace();
        }
        return "";
    }
    
    
    public static String decryptPKCS7ForBase64(String pwd,String source,byte[] IV){
        if(source==null||pwd==null)
            return "";
        byte[] sbytes=Base64.decodeBase64(source);//hexStr2bytes(source);
        try {
            KeyGenerator keygen=KeyGenerator.getInstance("AES");
            SecureRandom sr=SecureRandom.getInstance("SHA1PRNG");
            sr.setSeed(pwd.getBytes());
            keygen.init(128,sr);
            SecretKey key=keygen.generateKey();
            byte[] keyendoce=key.getEncoded();
            SecretKeySpec keyspec=new SecretKeySpec(keyendoce, "AES");
            Cipher cipher=Cipher.getInstance("AES/CBC/PKCS5Padding");
            try {
                cipher.init(Cipher.DECRYPT_MODE, keyspec,new IvParameterSpec(IV));
                byte[] dbytes=cipher.doFinal(sbytes);
                return new String(dbytes,"utf8");
            } catch (UnsupportedEncodingException e) {
                System.out.println("解密过程中，编码错误!");
                e.printStackTrace();
            } catch (InvalidAlgorithmParameterException e) {
                e.printStackTrace();
            }
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        } catch (NoSuchPaddingException e) {
            e.printStackTrace();
        } catch (InvalidKeyException e) {
            e.printStackTrace();
        } catch (IllegalBlockSizeException e) {
            e.printStackTrace();
        } catch (BadPaddingException e) {
            e.printStackTrace();
        }
        return "";
    }
    
    
    public static String encryptPKCS7ForBase64(byte[] pwd,String source,byte[] IV){
        if(source==null||pwd==null)
            return null;
        try {
            KeyGenerator keygen=KeyGenerator.getInstance("AES");
            SecureRandom sr=SecureRandom.getInstance("SHA1PRNG");
            sr.setSeed(pwd);
            keygen.init(128,sr);
            SecretKey key=keygen.generateKey();
            byte[] keyendoce=key.getEncoded();
            SecretKeySpec keyspec=new SecretKeySpec(keyendoce, "AES");
            Cipher cipher=Cipher.getInstance("AES/CBC/PKCS5Padding");
            try {
                cipher.init(Cipher.ENCRYPT_MODE,keyspec,new IvParameterSpec(IV));
                byte[] sbytes=null;
                sbytes = cipher.doFinal(source.getBytes("utf8"));
                return Base64.encodeBase64String(sbytes);//byte2hexStr(sbytes);  //这里也可以用base64来表示,这样解密的时候反解析base64
            } catch (UnsupportedEncodingException e) {
                System.out.println("加密过程中，getbyte有错误!");
                e.printStackTrace();
            } catch (InvalidAlgorithmParameterException e) {
                e.printStackTrace();
            }
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        } catch (NoSuchPaddingException e) {
            e.printStackTrace();
        } catch (InvalidKeyException e) {
            e.printStackTrace();
        } catch (IllegalBlockSizeException e) {
            e.printStackTrace();
        } catch (BadPaddingException e) {
            e.printStackTrace();
        }
        return "";
    }
    
    
    public static String decryptPKCS7ForBase64(byte[] pwd,String source,byte[] IV){
        if(source==null||pwd==null)
            return "";
        byte[] sbytes=Base64.decodeBase64(source);//hexStr2bytes(source);
        try {
            KeyGenerator keygen=KeyGenerator.getInstance("AES");
            SecureRandom sr=SecureRandom.getInstance("SHA1PRNG");
            sr.setSeed(pwd);
            keygen.init(128,sr);
            SecretKey key=keygen.generateKey();
            byte[] keyendoce=key.getEncoded();
            SecretKeySpec keyspec=new SecretKeySpec(keyendoce, "AES");
            Cipher cipher=Cipher.getInstance("AES/CBC/PKCS5Padding");
            try {
                cipher.init(Cipher.DECRYPT_MODE, keyspec,new IvParameterSpec(IV));
                byte[] dbytes=cipher.doFinal(sbytes);
                return new String(dbytes,"utf8");
            } catch (UnsupportedEncodingException e) {
                System.out.println("解密过程中，编码错误!");
                e.printStackTrace();
            } catch (InvalidAlgorithmParameterException e) {
                e.printStackTrace();
            }
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        } catch (NoSuchPaddingException e) {
            e.printStackTrace();
        } catch (InvalidKeyException e) {
            e.printStackTrace();
        } catch (IllegalBlockSizeException e) {
            e.printStackTrace();
        } catch (BadPaddingException e) {
            e.printStackTrace();
        }
        return "";
    }
}