java web与android互通的aes算法

####Java实现代码

	//可自定义保证16btye即可
    private static final byte[] IV = {16, 26, -35, 23, 34, 125, -5, -4, -8, -9, -15, -78, 90, -8, -99, 100};

    public static byte[] encrypt(String content, String password) {
        try {
            SecretKeySpec key = getKey(password);//根据密码生成key
            if(key == null){
                return null;
            }
            Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");// 创建密码器"算法/模式/补码方式"
            byte[] byteContent = content.getBytes("utf-8");
            cipher.init(Cipher.ENCRYPT_MODE, key, new IvParameterSpec(IV));//初始化，使用该模式，需要一个向量16byte的IvParameterSpec
            byte[] result = cipher.doFinal(byteContent);// 加密
            return result;
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }

    public static String encryptToStr(String content, String password) {
        byte[] bytes = encrypt(content, password);
        if(bytes == null){
            return null;
        }
        return Base64Util.encode(bytes);
    }

    public static byte[] decrypt(byte[] content, String password) {
        try {
            SecretKeySpec key = getKey(password);//根据密码生成key
            if(key == null){
                return null;
            }
            Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");//创建密码器"算法/模式/补码方式"
            cipher.init(Cipher.DECRYPT_MODE, key, new IvParameterSpec(IV));//初始化，使用该模式，需要一个向量16byte的IvParameterSpec
            byte[] result = cipher.doFinal(content);// 解密
            return result;
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }

    public static String decryptFromStr(String encodeStr, String password) {
        byte[] encodeBytes = Base64Util.decodeToBytes(encodeStr);
        byte[] bytes = decrypt(encodeBytes, password);
        if(bytes == null){
            return null;
        }
        return new String(bytes);
    }

    //根据密码生成16byte的key
    private static SecretKeySpec getKey(String password){
        try {
            byte[] passwdBytes = password.getBytes("utf-8");
            if(passwdBytes.length < 16){
                return null;
            }
            //简单转换为16byte，建议用复杂的转换以防被知道密码后破解
            byte[] bytes = new byte[16];
            for(int i = 0; i < 16; i++){
                bytes[i] = passwdBytes[i];
            }
            return new SecretKeySpec(bytes, "AES");
        }catch(Exception e){
            e.printStackTrace();
            return null;
        }
    }

####AES加密模式和填充方式 | 算法/模式/填充 | 16字节加密后数据长度 | 不满16字节加密后长度 | | ------------- |:-------------:|:-----:| |AES/CBC/NoPadding|16| 不支持| |AES/CBC/PKCS5Padding|32|16 |AES/CBC/ISO10126Padding|32|16 |AES/CFB/NoPadding|16|原始数据长度 |AES/CFB/PKCS5Padding|32|16 |AES/CFB/ISO10126Padding|32|16 |AES/ECB/NoPadding|16|不支持 |AES/ECB/PKCS5Padding|32|16 |AES/ECB/ISO10126Padding|32|16 |AES/OFB/NoPadding|16|原始数据长度 |AES/OFB/PKCS5Padding|32|16 |AES/OFB/ISO10126Padding|32|16 |AES/PCBC/NoPadding|16|不支持 |AES/PCBC/PKCS5Padding|32|16 |AES/PCBC/ISO10126Padding|32|16

来源：oschina

链接：https://my.oschina.net/u/139163/blog/538547

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java

android

aes