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164 changes: 164 additions & 0 deletions
164
cachecloud-web/src/main/java/com/sohu/cache/web/util/AESCoder.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,164 @@ | ||
| package com.sohu.cache.web.util; | ||
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| import com.sohu.cache.util.StringUtil; | ||
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| import javax.crypto.Cipher; | ||
| import javax.crypto.KeyGenerator; | ||
| import javax.crypto.SecretKey; | ||
| import javax.crypto.spec.SecretKeySpec; | ||
| import java.security.Key; | ||
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| public class AESCoder { | ||
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| /** | ||
| * 密钥算法 | ||
| * java6支持56位密钥，bouncycastle支持64位 | ||
| * */ | ||
| public static final String KEY_ALGORITHM="AES"; | ||
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| /** | ||
| * 加密/解密算法/工作模式/填充方式 | ||
| * | ||
| * JAVA6 支持PKCS5PADDING填充方式 | ||
| * Bouncy castle支持PKCS7Padding填充方式 | ||
| * */ | ||
| public static final String CIPHER_ALGORITHM="AES/ECB/PKCS5Padding"; | ||
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| /** | ||
| * | ||
| * 生成密钥，java6只支持56位密钥，bouncycastle支持64位密钥 | ||
| * @return byte[] 二进制密钥 | ||
| * */ | ||
| public static byte[] initkey() throws Exception{ | ||
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| //实例化密钥生成器 | ||
| KeyGenerator kg=KeyGenerator.getInstance(KEY_ALGORITHM); | ||
| //初始化密钥生成器，AES要求密钥长度为128位、192位、256位 | ||
| kg.init(256); | ||
| //生成密钥 | ||
| SecretKey secretKey=kg.generateKey(); | ||
| //获取二进制密钥编码形式 | ||
| return secretKey.getEncoded(); | ||
| } | ||
| /** | ||
| * 转换密钥 | ||
| * @param key 二进制密钥 | ||
| * @return Key 密钥 | ||
| * */ | ||
| public static Key toKey(byte[] key) throws Exception{ | ||
| //实例化DES密钥 | ||
| //生成密钥 | ||
| SecretKey secretKey=new SecretKeySpec(key,KEY_ALGORITHM); | ||
| return secretKey; | ||
| } | ||
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| /** | ||
| * 加密数据 | ||
| * @param data 待加密数据 | ||
| * @return byte[] 加密后的数据 | ||
| * */ | ||
| public static String encrypt(String data, String key) throws Exception{ | ||
| if(StringUtil.isBlank(data)){ | ||
| return ""; | ||
| } | ||
| byte[] encrypt = encrypt(data.getBytes(), key.getBytes()); | ||
| return parseByte2HexStr(encrypt); | ||
| } | ||
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| /** | ||
| * 加密数据 | ||
| * @param data 待加密数据 | ||
| * @param key 密钥 | ||
| * @return byte[] 加密后的数据 | ||
| * */ | ||
| public static byte[] encrypt(byte[] data,byte[] key) throws Exception{ | ||
| //还原密钥 | ||
| Key k=toKey(key); | ||
| /** | ||
| * 实例化 | ||
| * 使用 PKCS7PADDING 填充方式，按如下方式实现,就是调用bouncycastle组件实现 | ||
| * Cipher.getInstance(CIPHER_ALGORITHM,"BC") | ||
| */ | ||
| Cipher cipher=Cipher.getInstance(CIPHER_ALGORITHM); | ||
| //初始化，设置为加密模式 | ||
| cipher.init(Cipher.ENCRYPT_MODE, k); | ||
| //执行操作 | ||
| return cipher.doFinal(data); | ||
| } | ||
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| /** | ||
| * 解密数据 | ||
| * @param data 待解密数据 | ||
| * @return byte[] 解密后的数据 | ||
| * */ | ||
| public static String decrypt(String data, String key) throws Exception{ | ||
| if(StringUtil.isBlank(data)){ | ||
| return null; | ||
| } | ||
| byte[] dataByte = parseHexStr2Byte(data); | ||
| if(dataByte == null || dataByte.length < 1){ | ||
| return null; | ||
| } | ||
| byte[] decrypt = decrypt(dataByte, key.getBytes()); | ||
| return new String(decrypt, "UTF-8"); | ||
| } | ||
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| /** | ||
| * 解密数据 | ||
| * @param data 待解密数据 | ||
| * @param key 密钥 | ||
| * @return byte[] 解密后的数据 | ||
| * */ | ||
| public static byte[] decrypt(byte[] data,byte[] key) throws Exception{ | ||
| //欢迎密钥 | ||
| Key k =toKey(key); | ||
| /** | ||
| * 实例化 | ||
| * 使用 PKCS7PADDING 填充方式，按如下方式实现,就是调用bouncycastle组件实现 | ||
| * Cipher.getInstance(CIPHER_ALGORITHM,"BC") | ||
| */ | ||
| Cipher cipher=Cipher.getInstance(CIPHER_ALGORITHM); | ||
| //初始化，设置为解密模式 | ||
| cipher.init(Cipher.DECRYPT_MODE, k); | ||
| //执行操作 | ||
| return cipher.doFinal(data); | ||
| } | ||
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| /** | ||
| * 将16进制转换为二进制 | ||
| * | ||
| * @param hexStr 字符串 | ||
| * @return 字节数组 | ||
| */ | ||
| public static byte[] parseHexStr2Byte(String hexStr) { | ||
| if (hexStr.length() < 1) { | ||
| return null; | ||
| } | ||
| byte[] result = new byte[hexStr.length() / 2]; | ||
| for (int i = 0; i < hexStr.length() / 2; i++) { | ||
| int high = Integer.parseInt(hexStr.substring(i * 2, i * 2 + 1), 16); | ||
| int low = Integer.parseInt(hexStr.substring(i * 2 + 1, i * 2 + 2), 16); | ||
| result[i] = (byte) (high * 16 + low); | ||
| } | ||
| return result; | ||
| } | ||
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| /** | ||
| * 将二进制转换成16进制 | ||
| * | ||
| * @param buf 字节数组 | ||
| * @return 字符串 | ||
| */ | ||
| public static String parseByte2HexStr(byte buf[]) { | ||
| StringBuffer sb = new StringBuffer(); | ||
| for (int i = 0; i < buf.length; i++) { | ||
| String hex = Integer.toHexString(buf[i] & 0xFF); | ||
| if (hex.length() == 1) { | ||
| hex = '0' + hex; | ||
| } | ||
| sb.append(hex.toUpperCase()); | ||
| } | ||
| return sb.toString(); | ||
| } | ||
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| } |
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