通過Java如何實現(xiàn)AES密碼算法

1. AES加密字符串

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public static byte[] encrypt(String content, String password) {

try {

KeyGenerator kgen = KeyGenerator.getInstance("AES");// 創(chuàng)建AES的Key生產(chǎn)者

kgen.init(128, new SecureRandom(password.getBytes()));// 利用用戶密碼作為隨機(jī)數(shù)初始化出

// 128位的key生產(chǎn)者

//加密沒關(guān)系，SecureRandom是生成安全隨機(jī)數(shù)序列，password.getBytes()是種子，只要種子相同，序列就一樣，所以解密只要有password就行

SecretKey secretKey = kgen.generateKey();// 根據(jù)用戶密碼，生成一個密鑰

byte[] enCodeFormat = secretKey.getEncoded();// 返回基本編碼格式的密鑰，如果此密鑰不支持編碼，則返回

// null。

SecretKeySpec key = new SecretKeySpec(enCodeFormat, "AES");// 轉(zhuǎn)換為AES專用密鑰

Cipher cipher = Cipher.getInstance("AES");// 創(chuàng)建密碼器

byte[] byteContent = content.getBytes("utf-8");

cipher.init(Cipher.ENCRYPT_MODE, key);// 初始化為加密模式的密碼器

byte[] result = cipher.doFinal(byteContent);// 加密

return result;

} catch (NoSuchPaddingException e) {

e.printStackTrace();

} catch (NoSuchAlgorithmException e) {

e.printStackTrace();

} catch (UnsupportedEncodingException e) {

e.printStackTrace();

} catch (InvalidKeyException e) {

e.printStackTrace();

} catch (IllegalBlockSizeException e) {

e.printStackTrace();

} catch (BadPaddingException e) {

e.printStackTrace();

}

return null;

}

2. AES解密

public static byte[] decrypt(byte[] content, String password) {

try {

KeyGenerator kgen = KeyGenerator.getInstance("AES");// 創(chuàng)建AES的Key生產(chǎn)者

kgen.init(128, new SecureRandom(password.getBytes()));

SecretKey secretKey = kgen.generateKey();// 根據(jù)用戶密碼，生成一個密鑰

byte[] enCodeFormat = secretKey.getEncoded();// 返回基本編碼格式的密鑰

SecretKeySpec key = new SecretKeySpec(enCodeFormat, "AES");// 轉(zhuǎn)換為AES專用密鑰

Cipher cipher = Cipher.getInstance("AES");// 創(chuàng)建密碼器

cipher.init(Cipher.DECRYPT_MODE, key);// 初始化為解密模式的密碼器

byte[] result = cipher.doFinal(content);

return result; // 明文

} 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 null;

}

java如何用Aes加密和解密

你解密的key必須是加密的key啊

你看看，你解密的時候又KeyGenerator.getInstance("AES").generateKey();這是重新搞了一個key啊，當(dāng)然解不出來了

我估計你這代碼人家原先是寫在一起的吧，加密完了再直接解密給你看，人家只generateKey一次，自然很順利，你分成了兩個例子，居然分別generateKey，自然失敗

請教個關(guān)于Java實現(xiàn)AES加解密的問題

JDK對DESede算法的支持

密鑰長度：128位

工作模式：ECB/CBC/PCBC/CTR/CTS/CFB/CFB8 to CFB128/OFB/OBF8 to OFB128

填充方式：Nopadding/PKCS5Padding/ISO10126Padding/

AES加密解密的java實現(xiàn)：

package com.kongxincai.encanddec;import java.security.Key;import java.security.NoSuchAlgorithmException;import javax.crypto.Cipher;import javax.crypto.KeyGenerator;import javax.crypto.SecretKey;import javax.crypto.spec.SecretKeySpec;public class AESCoder { ? private static final String KEY_ALGORITHM = "AES"; ? private static final String DEFAULT_CIPHER_ALGORITHM = "AES/ECB/PKCS5Padding";//默認(rèn)的加密算法

public static byte[] initSecretKey() { ? ? ? //返回生成指定算法密鑰生成器的 KeyGenerator 對象

KeyGenerator kg = null; ? ? ? try {

kg = KeyGenerator.getInstance(KEY_ALGORITHM);

} catch (NoSuchAlgorithmException e) {

e.printStackTrace(); ? ? ? ? ? return new byte[0];

} ? ? ? //初始化此密鑰生成器，使其具有確定的密鑰大小 ? ? ? //AES 要求密鑰長度為 128

kg.init(128); ? ? ? //生成一個密鑰

SecretKey ?secretKey = kg.generateKey(); ? ? ? return secretKey.getEncoded();

} ? private static Key toKey(byte[] key){ ? ? ? //生成密鑰

return new SecretKeySpec(key, KEY_ALGORITHM);

} ? public static byte[] encrypt(byte[] data,Key key) throws Exception{ ? ? ? return encrypt(data, key,DEFAULT_CIPHER_ALGORITHM);

} ? public static byte[] encrypt(byte[] data,byte[] key) throws Exception{ ? ? ? return encrypt(data, key,DEFAULT_CIPHER_ALGORITHM);

} ? public static byte[] encrypt(byte[] data,byte[] key,String cipherAlgorithm) throws Exception{ ? ? ? //還原密鑰

Key k = toKey(key); ? ? ? return encrypt(data, k, cipherAlgorithm);

} ? public static byte[] encrypt(byte[] data,Key key,String cipherAlgorithm) throws Exception{ ? ? ? //實例化

Cipher cipher = Cipher.getInstance(cipherAlgorithm); ? ? ? //使用密鑰初始化，設(shè)置為加密模式 ? ? ? cipher.init(Cipher.ENCRYPT_MODE, key); ? ? ? //執(zhí)行操作

return cipher.doFinal(data);

} ? public static byte[] decrypt(byte[] data,byte[] key) throws Exception{ ? ? ? return decrypt(data, key,DEFAULT_CIPHER_ALGORITHM);

} ? public static byte[] decrypt(byte[] data,Key key) throws Exception{ ? ? ? return decrypt(data, key,DEFAULT_CIPHER_ALGORITHM);

} ? public static byte[] decrypt(byte[] data,byte[] key,String cipherAlgorithm) throws Exception{ ? ? ? //還原密鑰

Key k = toKey(key); ? ? ? return decrypt(data, k, cipherAlgorithm);

} ? public static byte[] decrypt(byte[] data,Key key,String cipherAlgorithm) throws Exception{ ? ? ? //實例化

Cipher cipher = Cipher.getInstance(cipherAlgorithm); ? ? ? //使用密鑰初始化，設(shè)置為解密模式 ? ? ? cipher.init(Cipher.DECRYPT_MODE, key); ? ? ? //執(zhí)行操作

return cipher.doFinal(data);

} ? private static String ?showByteArray(byte[] data){ ? ? ? if(null == data){ ? ? ? ? ? return null;

}

StringBuilder sb = new StringBuilder("{"); ? ? ? for(byte b:data){

sb.append(b).append(",");

}

sb.deleteCharAt(sb.length()-1);

sb.append("}"); ? ? ? return sb.toString();

} ? public static void main(String[] args) throws Exception { ? ? ? byte[] key = initSecretKey();

System.out.println("key："+showByteArray(key));

Key k = toKey(key); //生成秘鑰

String data ="AES數(shù)據(jù)";

System.out.println("加密前數(shù)據(jù): string:"+data);

System.out.println("加密前數(shù)據(jù): byte[]:"+showByteArray(data.getBytes()));

System.out.println(); ? ? ? byte[] encryptData = encrypt(data.getBytes(), k);//數(shù)據(jù)加密

System.out.println("加密后數(shù)據(jù): byte[]:"+showByteArray(encryptData));// ? ? ? System.out.println("加密后數(shù)據(jù): hexStr:"+Hex.encodeHexStr(encryptData)); ? ? ? System.out.println(); ? ? ? byte[] decryptData = decrypt(encryptData, k);//數(shù)據(jù)解密

System.out.println("解密后數(shù)據(jù): byte[]:"+showByteArray(decryptData));

System.out.println("解密后數(shù)據(jù): string:"+new String(decryptData));

}

}

java實現(xiàn)aes加密或者解密，不用工具包的怎么做

import?java.security.InvalidKeyException;

import?java.security.Key;

import?java.security.NoSuchAlgorithmException;

import?javax.crypto.*;??

import?javax.crypto.spec.*;??

/**

*?

*?@author?wchun

*?

*?AES128?算法，加密模式為ECB，填充模式為?pkcs7（實際就是pkcs5）

*?

*

*/

public?class?AES?{

static?final?String?algorithmStr="AES/ECB/PKCS5Padding";

static?private?KeyGenerator?keyGen;

static?private?Cipher?cipher;

static?boolean?isInited=false;

//初始化

static?private?void?init()

{

//初始化keyGen

try?{

keyGen=KeyGenerator.getInstance("AES");

}?catch?(NoSuchAlgorithmException?e)?{

//?TODO?Auto-generated?catch?block

e.printStackTrace();

}

keyGen.init(128);

//初始化cipher

try?{

cipher=Cipher.getInstance(algorithmStr);

}?catch?(NoSuchAlgorithmException?e)?{

//?TODO?Auto-generated?catch?block

e.printStackTrace();

}?catch?(NoSuchPaddingException?e)?{

//?TODO?Auto-generated?catch?block

e.printStackTrace();

}

isInited=true;

}

public?static?byte[]?GenKey()

{

if(!isInited)//如果沒有初始化過,則初始化

{

init();

}

return?keyGen.generateKey().getEncoded();

}

public?static?byte[]?Encrypt(byte[]?content,byte[]?keyBytes)

{

byte[]?encryptedText=null;

if(!isInited)//為初始化

{

init();

}

Key?key=new?SecretKeySpec(keyBytes,"AES");

try?{

cipher.init(Cipher.ENCRYPT_MODE,?key);

}?catch?(InvalidKeyException?e)?{

//?TODO?Auto-generated?catch?block

e.printStackTrace();

}

try?{

encryptedText=cipher.doFinal(content);

}?catch?(IllegalBlockSizeException?e)?{

//?TODO?Auto-generated?catch?block

e.printStackTrace();

}?catch?(BadPaddingException?e)?{

//?TODO?Auto-generated?catch?block

e.printStackTrace();

}

return?encryptedText;

}

//解密為byte[]

public?static?byte[]?DecryptToBytes(byte[]?content,byte[]?keyBytes)

{

byte[]?originBytes=null;

if(!isInited)

{

init();

}

Key?key=new?SecretKeySpec(keyBytes,"AES");

try?{

cipher.init(Cipher.DECRYPT_MODE,?key);

}?catch?(InvalidKeyException?e)?{

//?TODO?Auto-generated?catch?block

e.printStackTrace();

}

//解密

try?{

originBytes=cipher.doFinal(content);

}?catch?(IllegalBlockSizeException?e)?{

//?TODO?Auto-generated?catch?block

e.printStackTrace();

}?catch?(BadPaddingException?e)?{

//?TODO?Auto-generated?catch?block

e.printStackTrace();

}

return?originBytes;

}

}

java aes加密 如何用php 進(jìn)行解密，以下是java代碼，求php 代碼如何寫 （主要是createkey 那個方法）

先看用什么方式的加密,拿AES來說,你需要問java要到混淆值、初始化向量與AES加密的方式如AES-192-CFB.然后直接調(diào)用openssl_decrypt方法進(jìn)行解密.

openssl_decrypt('需要解密的字符串','AES-192-CFB','混淆值',0,'初始化向量'),true)

java實現(xiàn)ase加密解密

這個算法java SDK自帶的額 參考代碼如下：

/**解密

*?@param?content??待解密內(nèi)容

*?@param?password?解密密鑰

*?@return

*/

public?static?byte[]?decrypt(byte[]?content,?String?password)?{

try?{

KeyGenerator?kgen?=?KeyGenerator.getInstance("AES");

kgen.init(128,?new?SecureRandom(password.getBytes()));

SecretKey?secretKey?=?kgen.generateKey();

byte[]?enCodeFormat?=?secretKey.getEncoded();

SecretKeySpec?key?=?new?SecretKeySpec(enCodeFormat,?"AES");

Cipher?cipher?=?Cipher.getInstance("AES");//?創(chuàng)建密碼器

cipher.init(Cipher.DECRYPT_MODE,?key);//?初始化

byte[]?result?=?cipher.doFinal(content);

return?result;?//?加密

}?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?null;

}

/**

*?加密

*

*?@param?content?需要加密的內(nèi)容

*?@param?password??加密密碼

*?@return

*/

public?static?byte[]?encrypt(String?content,?String?password)?{

try?{

KeyGenerator?kgen?=?KeyGenerator.getInstance("AES");

kgen.init(128,?new?SecureRandom(password.getBytes()));

SecretKey?secretKey?=?kgen.generateKey();

byte[]?enCodeFormat?=?secretKey.getEncoded();

SecretKeySpec?key?=?new?SecretKeySpec(enCodeFormat,?"AES");

Cipher?cipher?=?Cipher.getInstance("AES");//?創(chuàng)建密碼器

byte[]?byteContent?=?content.getBytes("utf-8");

cipher.init(Cipher.ENCRYPT_MODE,?key);//?初始化

byte[]?result?=?cipher.doFinal(byteContent);

return?result;?//?加密

}?catch?(NoSuchAlgorithmException?e)?{

e.printStackTrace();

}?catch?(NoSuchPaddingException?e)?{

e.printStackTrace();

}?catch?(InvalidKeyException?e)?{

e.printStackTrace();

}?catch?(UnsupportedEncodingException?e)?{

e.printStackTrace();

}?catch?(IllegalBlockSizeException?e)?{

e.printStackTrace();

}?catch?(BadPaddingException?e)?{

e.printStackTrace();

}

return?null;

}

圖像界面的話就不說了