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AES加密
import javax.crypto.*; import javax.crypto.spec.*; public class AES { public static void main(String[] args) throws Exception { /* 加密用的Key 可以用26个字母和数字组成,最好不要用保留字符,虽然不会错,至于怎么裁决,个人看情况而定 */ String cKey = "1234567890abcDEF"; //需要加密的字串 String cSrc = "http://www.mamicode.com/我的MSN:miaozu@msn.com,QQ:68524621" ; //加密 long lStart = System.currentTimeMillis(); String enString = AES.Encrypt(cSrc, cKey); System.out.println("加密后的字串是:" + enString); long lUseTime = System.currentTimeMillis() - lStart; System.out.println("加密耗时:" + lUseTime + "毫秒"); //解密 lStart = System.currentTimeMillis(); String DeString = AES.Decrypt(enString, cKey); System.out.println("解密后的字串是:" + DeString); lUseTime = System.currentTimeMillis() - lStart; System.out.println("解密耗时:" + lUseTime + "毫秒"); } public static String Decrypt(String sSrc, String sKey) throws Exception { try { //判断Key是否正确 if (sKey == null) { System.out.print("Key为空null"); return null; } //判断Key是否为16位 if (sKey.length() != 16) { System.out.print("Key长度不是16位"); return null; } byte[] raw = sKey.getBytes("ASCII"); SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES"); Cipher cipher = Cipher.getInstance("AES"); cipher.init(Cipher.DECRYPT_MODE, skeySpec); byte[] encrypted1 = hex2byte(sSrc); try { byte[] original = cipher.doFinal(encrypted1); String originalString = new String(original); return originalString; } catch (Exception e) { System.out.println(e.toString()); return null; } } catch (Exception ex) { System.out.println(ex.toString()); return null; } } //判断Key是否正确 public static String Encrypt(String sSrc, String sKey) throws Exception { if (sKey == null) { System.out.print("Key为空null"); return null; } //判断Key是否为16位 if (sKey.length() != 16) { System.out.print("Key长度不是16位"); return null; } byte[] raw = sKey.getBytes("ASCII"); SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES"); Cipher cipher = Cipher.getInstance("AES"); cipher.init(Cipher.ENCRYPT_MODE, skeySpec); byte[] encrypted = cipher.doFinal(sSrc.getBytes()); return byte2hex(encrypted).toLowerCase(); } public static byte[] hex2byte(String strhex) { if (strhex == null) { return null; } int l = strhex.length(); if (l % 2 == 1) { return null; } byte[] b = new byte[l / 2]; for (int i = 0; i != l / 2; i++) { b[i] = (byte) Integer.parseInt(strhex.substring(i * 2, i * 2 + 2), 16); } return b; } public static String byte2hex(byte[] b) { String hs = ""; String stmp = ""; for (int n = 0; n < b.length; n++) { stmp = (java.lang.Integer.toHexString(b[n] & 0XFF)); if (stmp.length() == 1) { hs = hs + "0" + stmp; } else { hs = hs + stmp; } } return hs.toUpperCase(); } } 以上代码执行结果 加密后的字串是:e965a929ae598b701bc2bc4714164c27524aab4769f269c434c55b61e398600175a38e0a4794cdef9c0463a182d2cde3 加密耗时:672毫秒 解密后的字串是:我的MSN:miaozu@msn.com,QQ:68524621 解密耗时:0毫秒
AES加密
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