欢迎您访问程序员文章站本站旨在为大家提供分享程序员计算机编程知识!
您现在的位置是: 首页

java 加密API AES RSA MD5 SHA-1 SHA-256

程序员文章站 2022-03-25 21:26:56
...

AES ----

public static String aesEncode(String message, String key) {
        try {
            Cipher c = Cipher.getInstance("AES/ECB/PKCS5Padding");

            SecretKeySpec secretKeySpec = new SecretKeySpec(key.getBytes("UTF-8"),"AES");

            c.init(Cipher.ENCRYPT_MODE,secretKeySpec);
            byte[] bytes = c.doFinal(message.getBytes("UTF-8"));
            byte[] encode = Base64.getEncoder().encode(bytes);
            return new String(encode,"UTF-8");
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        } catch (NoSuchPaddingException e) {
            e.printStackTrace();
        } catch (BadPaddingException e) {
            e.printStackTrace();
        } catch (IllegalBlockSizeException e) {
            e.printStackTrace();
        } catch (InvalidKeyException e) {
            e.printStackTrace();
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
        return null;
    }


    public static String aesDecode(String message, String key) {
        try {
            Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
            SecretKeySpec secretKeySpec = new SecretKeySpec(key.getBytes("UTF-8"),"AES");
            cipher.init(Cipher.DECRYPT_MODE,secretKeySpec);
            byte[] bytes = cipher.doFinal(Base64.getDecoder().decode(message.getBytes("UTF-8")));
            return new String(bytes,"UTF-8");

        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        } catch (NoSuchPaddingException e) {
            e.printStackTrace();
        } catch (InvalidKeyException e) {
            e.printStackTrace();
        } catch (BadPaddingException e) {
            e.printStackTrace();
        } catch (IllegalBlockSizeException e) {
            e.printStackTrace();
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }


        return null;
    }

RSA -----

 private static String rsaEncode(String message,PublicKey key) {
        try {

            Cipher cipher = Cipher.getInstance("RSA");

            cipher.init(Cipher.ENCRYPT_MODE,key);

            byte[] bytes = cipher.doFinal(message.getBytes());

            byte[] encode = Base64.getEncoder().encode(bytes);
            System.out.println(new String(encode));
            return new String(encode);

        } catch (NoSuchAlgorithmException | NoSuchPaddingException | InvalidKeyException e) {
            e.printStackTrace();
        } catch (BadPaddingException e) {
            e.printStackTrace();
        } catch (IllegalBlockSizeException e) {
            e.printStackTrace();
        }
        return null;
    }



    public static String decode(String message, PrivateKey key){

        try {
            Cipher cipher = Cipher.getInstance("RSA");
            cipher.init(Cipher.DECRYPT_MODE,key);
            byte[] bytes = cipher.doFinal(Base64.getDecoder().decode(message.getBytes()));
            return new String(bytes);
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        } catch (NoSuchPaddingException e) {
            e.printStackTrace();
        } catch (InvalidKeyException e) {
            e.printStackTrace();
        } catch (BadPaddingException e) {
            e.printStackTrace();
        } catch (IllegalBlockSizeException e) {
            e.printStackTrace();
        }
        return null;
    }

MD5 SHA-1 SHA-256 —

private static String md5Encode(String message) {
        try {
            MessageDigest messageDigest = MessageDigest.getInstance("MD5");
            byte[] digest = messageDigest.digest(message.getBytes());


            StringBuilder builder = byte2Hex(digest);

            System.out.println(builder);

            return builder.toString();
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        }

        return null;
    }


    private static String sha1Encode(String message){

        try {
            MessageDigest messageDigest = MessageDigest.getInstance("SHA-1");
            byte[] digest = messageDigest.digest(message.getBytes());
            StringBuilder builder = byte2Hex(digest);

            System.out.println(builder);
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        }

        return null;
    }

    private static String sha128Encode(String message){

        try {
            MessageDigest messageDigest = MessageDigest.getInstance("SHA-256");
            byte[] digest = messageDigest.digest(message.getBytes());
            StringBuilder builder = byte2Hex(digest);

            System.out.println(builder);
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        }

        return null;
    }

    private static StringBuilder byte2Hex(byte[] digest) {
        StringBuilder builder = new StringBuilder();
        for (byte b : digest) {
            String format = String.format("%02x", b);
            builder.append(format);
        }
        return builder;
    }